Rotary blow molding molds - Production process flow, equipment selection and safety precautions

2026-01-30 11:02:01

Rotary blow molding molds are the core equipment for large-scale production of plastic hollow products. They are mainly adapted to rotary blow molding equipment. Through the continuous rotating mold structure and the extruded blank produced by the extruder, after processes such as blowing, cooling, and shaping, various plastic hollow containers can be batch-produced, covering small disposable beverage bottles, medium-sized packaging bottles for daily use, to large-capacity industrial containers of 20-30 liters and other specifications. They are widely used in fields such as food packaging, daily chemical products, pharmaceutical packaging, industrial chemicals, agricultural irrigation, and many others. The core advantage lies in that the rotary structure enables continuous operations such as blank grasping, blowing, cooling, and demolding. The mechanical repetition is strong, and the weight and size tolerance of the products can be precisely controlled. The production efficiency is increased by more than 60% compared to ordinary intermittent blow molding molds. They can also be adapted for single-layer to multi-layer composite product production and support special processes such as in-mold labeling (IML) and visual strips. This perfectly addresses the industry pain points of low production efficiency, poor product consistency, and insufficient batch production stability of traditional blow molding molds, making it the preferred mold type for medium-sized and large-scale hollow product production enterprises. With the upgrading of the plastic packaging industry towards efficiency, precision, and diversification, the application of rotary blow molding molds has become increasingly widespread. A standardized production system from mold design, raw material processing to finished product inspection has been formed, involving multiple core processes such as mold processing, heat treatment, assembly, and trial molding. The requirements for processing equipment accuracy, process parameter control, and safety protection are extremely high. However, many practitioners, Especially beginners, have many confusions in the production process norms, equipment selection adaptation, and safe operation of rotary blow molding molds. This article, based on the actual production of rotary blow molding molds, referring to industry technical standards and application cases, systematically outlines its standardized production process flow, scientific equipment selection techniques, and comprehensive safety precautions, in line with Baidu's indexing preferences. The content is detailed and practical, integrating core process parameters and industry key points, facilitating practitioners to directly copy and apply, and helping enterprises achieve efficient, precise, and safe production, promoting the high-quality development of the plastic hollow mold industry. The core of rotary blow molding mold production is "precise processing, uniform heat treatment, precise assembly, and stable trial molding". The production must strictly follow standardized procedures, taking into account the connectivity and standardization of each process, and focusing on controlling the processing accuracy of the mold and the uniformity of heat treatment.

 Equipment selection should be in line with the mold structure characteristics, production process, and production capacity requirements, highlighting high precision and high stability advantages. Safety precautions are key to preventing mechanical injuries, high-temperature burns, chemical corrosion, and equipment failures. The three are mutually reinforcing and indispensable. They are the core prerequisite for the efficient implementation and quality guarantee of rotary blow molding mold production. 

First, we will outline the standardized production process of the rotary blow molding mold. Considering its structural characteristics (consisting of six core components: mold body, cavity, cooling system, exhaust system, guiding mechanism, and locking mechanism), and referring to industry technical standards, the core process is divided into ten major steps: "raw material inspection and pre-treatment - mold design and programming - mold body processing - cavity processing - heat treatment - component assembly - cooling and exhaust system debugging - trial molding and adjustment - finished product inspection - packaging and delivery". Each step requires strict control of process parameters to prevent mold defects and poor product formation caused by random operations, ensuring that the produced molds meet industry standards and are suitable for various rotary blow molding equipment and hollow product production scenarios.

Raw material inspection and pre-treatment are the foundation of production, directly determining the hardness, wear resistance, service life and forming accuracy of the rotary blow molding mold. They must be strictly controlled throughout the process. The raw materials mainly include two types: one is the mold base material, which should preferentially use high-quality alloy structural steel (such as 45# steel, Cr12MoV, H13, etc.). During the entry, the material certificate and mechanical performance report should be verified. Spectroscopic analysis and hardness testing methods should be adopted to confirm that the purity, hardness and toughness of the steel meet the design requirements, and to prevent the entry of steel with excessive impurities or uneven material. Among the cavity parts, Cr12MoV steel with strong wear resistance and small thermal deformation should be preferred to ensure that the mold does not wear easily during long-term continuous operation; the second is auxiliary materials, including heat treatment medium (quenching oil, tempering agent), assembly fasteners (high-strength bolts, pins), seals (high-temperature and wear-resistant seals), cooling water pipes, etc. The inspection of auxiliary materials should be free from deterioration and damage, and the specifications should be consistent with the design requirements, meeting the assembly and usage needs of the mold. After inspection, the various raw materials are pre-treated: the mold base material undergoes forging and annealing treatment to eliminate internal stress of the steel and reduce the risk of subsequent processing deformation. The annealing temperature is controlled at 700-750℃, and it is held for 2-3 hours, then cooled naturally to room temperature; the fasteners undergo anti-rust treatment, the seals undergo cleaning and lubrication treatment, and the cooling water pipes undergo pressure testing to ensure no leakage. The spare parts are ready.

Mold design and programming are the pre-core link of the production of rotary blow molding molds, directly determining the rationality of the mold structure, the stability of the forming process and the accuracy of the product. They need to be precisely completed based on the product specifications, blow molding equipment parameters and production process requirements. The mold design focuses on four points: first, cavity design, according to the shape and size tolerance requirements of the product, design the appropriate cavity structure, reserve reasonable shrinkage allowance (the plastic shrinkage rate is controlled at 0.5%-2.0%, adjusted according to the plastic material), the surface of the cavity should be smooth, with a roughness Ra ≤ 0.8μm, to avoid scratches and burrs on the product surface; second, cooling system design, combined with the continuous operation characteristics of rotary blow molding, design a uniform cooling water path, using a ring-shaped or spiral-shaped cooling structure, to ensure uniform cooling of each part of the cavity and reduce the risk of product cooling deformation, the diameter of the cooling water path is controlled at 8-12mm, the spacing is controlled at 30-50mm; third, exhaust system design, in the areas prone to bubble generation at the edge and corner of the cavity, design reasonable exhaust grooves, the width of the exhaust groove is controlled at 0.02-0.05mm, the depth is controlled at 0.01-0.03mm, to ensure that the air in the mold blank is smoothly discharged during blowing, avoiding defects such as bubbles and depressions in the product; fourth, guiding and locking mechanism design, adapting to the continuous rotation characteristics of the rotary blow molding equipment, design high-precision guiding mechanisms, the guiding accuracy is controlled at ±0.01mm, the locking mechanism adopts a toggle link structure, to ensure that the mold is closed tightly and the force is uniform, avoiding mold loosening or misalignment during rotation. After design, 3D modeling is carried out using CAD/CAM software to generate processing drawings, and then imported into the CNC processing equipment to complete processing programming. The programming needs to precisely set the processing path and cutting parameters to ensure processing accuracy and efficiency, and adapt to the precise processing requirements of the subsequent mold body and cavity. 

Mold body processing is the fundamental step in mold forming, with the focus on controlling the size accuracy, flatness and perpendicularity of the mold body to ensure the accuracy of subsequent cavity processing and assembly. The pre-treated mold base material is sent to the CNC lathe and milling machine for rough and finish machining: First, perform rough machining to remove excess materials and reserve 0.3-0.5mm of finish machining allowance. The rough machining speed is controlled at 800-1200r/min, and the feed rate is controlled at 0.2-0.3mm/r. Then, perform finish machining on key parts such as the end face, outer circle, and installation surface of the mold body to ensure that the size error of the mold body is controlled within ±0.01mm, the flatness is ≤ 0.005mm/m, and the perpendicularity is ≤ 0.008mm/m. After processing, the mold body surface is polished and deburred to remove processing marks and ensure a smooth surface without protrusions. During the mold body processing, real-time monitoring of processing accuracy is required. Precision measuring tools such as dial indicators and micrometers are used for detection. Any deviations found are promptly adjusted to the processing parameters to avoid processing defects.

Cavity processing is the core process in the production of rotary blow molding molds, directly determining the forming quality and dimensional accuracy of the products. High-precision processing equipment must be used, and processing process parameters must be strictly controlled. Cavity processing should primarily adopt high-precision equipment such as CNC lathes, electrical discharge machining (EDM) machines, and wire cutting machines. The processing flow is divided into three steps: rough processing to remove excess materials from the cavity, leaving a 0.1-0.2mm allowance for semi-finishing; semi-finishing to initially shape the cavity contour, correcting deviations from rough processing, and leaving a 0.03-0.05mm allowance for finishing; and finishing using electrical discharge machining or high-speed milling to precisely process the cavity contour and surface, ensuring that the cavity size error is controlled within ±0.005mm, with a surface roughness of Ra ≤ 0.8μm, and rounding the cavity edges with a radius of 0.5-1.0mm to avoid stress concentration and cracking in the products. For complex-shaped cavities, five-axis联动 CNC processing equipment is required to ensure processing accuracy and molding effect. During the processing， cutting fluid is injected to reduce processing temperature， minimize tool wear and deformation， and the cutting fluid needs to be replaced regularly to maintain cleanliness. 

Heat treatment is a key process for enhancing the hardness， wear resistance， toughness， and service life of rotary blow molding molds. It requires formulating a reasonable heat treatment process based on the material of the mold base， strictly controlling the heat treatment temperature， time， and cooling rate to avoid defects such as deformation and cracking in the molds. The core of heat treatment consists of two steps： quenching and tempering. Some high-precision molds may require additional aging treatment： quenching treatment， sending the processed mold body and cavity to the heat treatment furnace， slowly heating to 850-950℃ (adjusting according to the material of the steel， with Cr12MoV steel controlled at 900-920℃)， holding for 1-2 hours to fully austenitize the steel， then quickly placing it in quenching oil for cooling， cooling to room temperature， and then removing for cleaning to remove surface quenching oil residues； tempering treatment， sending the quenched mold body and cavity back to the heat treatment furnace， heating to 200-300℃， holding for 2-3 hours， using a slow cooling method to eliminate quenching stress， improving the toughness of the mold， and avoiding brittle cracking of the mold after tempering. After tempering， the hardness of the mold needs to reach HRC58-62， ensuring that the mold has sufficient wear resistance and compressive strength； aging treatment， for high-precision molds， aging treatment is carried out after tempering， with a temperature control of 150-180℃ and a holding time of 4-6 hours， further eliminating internal stress， stabilizing the mold size， and avoiding deformation during subsequent use. After heat treatment， hardness and deformation tests are conducted on the molds. Unqualified molds need to undergo heat treatment again until they meet the standards. 

Component assembly is a crucial step in the production process of rotary blow molding molds, requiring precise and secure assembly of all components, smooth movement, and good sealing. It must also meet the continuous operation requirements of rotary blow molding equipment. The assembly process should follow the principles of "assembling from inside out, starting with smaller parts and then larger ones, precise positioning, and step-by-step debugging". The core steps include: First, assembly of the guiding mechanism, precisely installing the guide rods and guide sleeves on the mold body to ensure smooth guidance without jamming or loosening, with the guiding clearance controlled within 0.005-0.01mm; Second, assembly of the cavity, precisely installing the heat-treated cavities on the mold body and fixing them with high-strength bolts, with the tightening torque controlled at 25-35N·m to ensure precise positioning of the cavities without misalignment or loosening, and the cavity clearance controlled within 0.01-0.02mm; Third, assembly of the cooling and exhaust system, precisely installing the cooling water pipes and exhaust grooves, using sealing rings at the water pipe interfaces to ensure no leakage, and cleaning the exhaust grooves to remove any debris; Fourth, assembly of the clamping mechanism, installing toggle links, clamping cylinders, etc., adjusting the clamping force to ensure the mold closes tightly, with uniform force distribution, and no loosening during rotation; Fifth, assembly of other components, installing demolding mechanisms, positioning mechanisms, etc., to ensure coordinated movement of all components and compatibility with the operation rhythm of the rotary blow molding equipment. During the assembly process, precise measuring tools should be used to monitor the assembly accuracy in real time. Any misalignment or loosening issues should be promptly adjusted. After assembly, manually rotate the mold to check the movement flexibility, ensuring no jamming or abnormal sounds.

The cooling and exhaust system debugging is a crucial step to ensure the stability of mold usage and the quality of product formation. It needs to be completed before the mold trial run to avoid defects such as uneven cooling of the products and air bubbles during the trial run. Cooling system debugging: Connect the cooling water pipe to the external cooling equipment, introduce cooling water (with the temperature controlled at 15-25℃), adjust the cooling water flow rate to 5-10L/min, check for no leakage in the cooling water path, and use a thermometer to detect the temperature of each part of the cavity to ensure uniform temperature and a temperature difference controlled within ±2℃, avoiding excessive temperature differences that cause product deformation; Exhaust system debugging: Introduce compressed air (pressure controlled at 0.3-0.5MPa) into the cavity, check the exhaust effect of the exhaust groove, ensure smooth air discharge without blockage, and adjust the size of the exhaust groove to avoid excessive air discharge causing surface air lines on the products or insufficient air discharge resulting in bubble residue. After the debugging is completed, make a debugging record, retain the debugging parameters, and use them for reference and adjustment in subsequent production processes.

Mold trial and adjustment are key processes to verify the quality of the mold and optimize the molding parameters. They need to be combined with the corresponding rotary blow molding equipment to simulate the actual production scenario and complete the mold trial and defect adjustment. Before the mold trial, check the assembly accuracy of the mold, the sealing performance of the cooling and exhaust system, clean the surface debris and oil stains of the cavity, and apply a release agent (selecting a release agent suitable for the plastic material to avoid contaminating the products); During the mold trial, use the same plastic raw material as in actual production (such as PE, PP, PET, etc.), adjust the parameters of the blow molding equipment (extrusion temperature, mold thickness, blowing pressure, blowing time, cooling time), extrude the mold blank, rotate the mold to grasp the mold blank, blow and form, cool and shape, and remove the product after demolding. During the mold trial, focus on observing the product quality, and check for mold defects: If the product shows size deviations, adjust the cavity size or assembly accuracy; If the product has air bubbles, clean the exhaust groove or adjust the exhaust parameters; If the product shows uneven cooling or deformation, adjust the flow rate of the cooling water path or the temperature of the cooling water; If the product has scratches or burrs, polish the cavity surface or adjust the demolding mechanism. After the mold trial is qualified, perform final adjustment on the mold to remove assembly marks and burrs, clean the cavity, and ensure the mold surface is smooth and tidy; If the mold trial is not qualified, repeat the debugging and adjustment until the mold is qualified for stable batch production. 

The final inspection of the finished product is the last line of defense for the rotating blow molding molds before they leave the factory. A complete quality control system throughout the process must be established to ensure that the products meet industry standards and customer requirements. Refer to the industry inspection norms for implementation. The inspection content mainly includes four categories: First, appearance inspection, checking that the mold surface has no scratches, burrs, cracks, rust, etc., the cavity surface is smooth, the assembly parts are not loose or misaligned, and the cooling water pipes and exhaust grooves are not blocked; Second, precision inspection, using precision measuring tools such as three-coordinate measuring instruments and dial indicators to detect the mold size, cavity size, guiding accuracy, and locking accuracy, ensuring that all precision indicators meet the design requirements, with size errors controlled within ±0.005mm; Third, performance inspection, testing the mold hardness (reaching HRC58-62), wear resistance, and sealing performance, checking for no leakage in the cooling system, smooth exhaust in the exhaust system, uniform force on the locking mechanism, and flexible and smooth rotation without jamming; Fourth, compatibility inspection, installing the mold on the corresponding rotating blow molding equipment for small-scale trial production, inspecting the molding quality of the products, ensuring uniform product size, smooth surface, no bubbles, deformation, scratches, etc. Qualified products can then proceed to the packaging stage; Unqualified products need to be disassembled, problems identified, reworked, heat-treated, or reassembled until they are qualified, and prevent the production of unqualified products. 

During the packaging and shipping process, it is necessary to ensure both product protection and transportation safety. Measures should be taken to prevent damage to the molds, rusting, and loosening of components during transportation and storage. Use waterproof, moisture-proof, and shock-proof packaging materials (such as foam, waterproof films, wooden packaging boxes), seal the molds, apply anti-rust oil on the surface of the molds to prevent rusting; seal the cooling water pipes and exhaust grooves with sealing plugs to prevent foreign objects from entering; package the components separately, mark the specifications and uses, for easy subsequent assembly. After packaging, mark the product model, specifications, cavity size, material, heat treatment parameters, production date, qualified mark, and transportation precautions (strictly prohibit squeezing, moisture-proof, keep away from high temperatures, handle with care) on the packaging to facilitate subsequent storage, transportation and acceptance; at the same time, keep product production records, testing records, and process parameter records to facilitate subsequent traceability and ensure that the quality of each batch of products can be traced. 

In addition to adhering to the production process procedures, the selection techniques and safety precautions for rotary blow molding equipment also need to be mastered. Reasonable equipment selection is the prerequisite for improving production efficiency, ensuring product quality, and controlling production costs. Safety compliance is the bottom line of production. Both are indispensable. At the same time, they are in line with the development trend of the plastic mold industry towards precision, efficiency, and environmental protection. 

In terms of selection, the core principles to follow are "matching the mold processing technology, considering both accuracy and production capacity, controlling costs, facilitating operation and maintenance, and complying with environmental protection". Based on the enterprise's production scale, mold specifications (cavity size and quantity), and production capacity requirements, four key points should be considered. This is to meet the needs of different scale production enterprises. Refer to industry application cases: First, match the core processing technology, prioritize selecting high-precision processing equipment and heat treatment equipment. Numerical control processing equipment should primarily use five-axis联动 numerical milling machines and high-precision electrical discharge machining machines， which have the characteristics of high precision， stable operation， and high processing efficiency. They can precisely process complex cavities and mold structures， with processing accuracy controlled within ±0.005mm. The heat treatment furnace should have precise temperature control function (temperature range 700-1000℃)， be able to achieve gradient heating and insulation， have good temperature uniformity inside the furnace， be equipped with ventilation and exhaust devices， and comply with environmental protection requirements. At the same time， it should be equipped with precision detection equipment (three-coordinate measuring instruments， hardness testers， dial indicators)， ensuring that processing accuracy and product quality can be detected and controlled. Second， meet the production capacity requirements. For small-scale， small-batch customized production (average daily production of 5-20 molds)， semi-automatic production equipment can be selected， such as semi-automatic numerical milling machines， manual electrical discharge machining machines， and semi-automatic heat treatment furnaces. These have low investment costs， simple operation， and are suitable for beginners or small-scale production enterprises. For medium-scale, large-batch standardized production (average daily production of 20 or more molds)， it is recommended to choose fully automatic and intelligent production equipment. Adopt PLC control systems and human-machine interface operations， which can achieve integrated operations of mold design， programming， processing， and detection， significantly improving production efficiency， reducing manual intervention， and ensuring product consistency. At the same time， it can be combined with automatic grinding equipment and automatic cleaning equipment to further enhance the production automation level. Third， consider equipment accuracy and quality. Rotating blow molding molds have extremely high requirements for production equipment precision. When selecting， priority should be given to equipment with high precision， stable operation， and low failure rate. Core components (such as the lead screw and guide rail of the numerical control equipment， and the heating tube and temperature sensor of the heat treatment furnace) have reliable quality， ensuring the long-term operation stability of the equipment and reducing product scrap rate. At the same time， attention should be paid to the energy-saving and environmental protection of the equipment， especially the heat treatment furnace and processing equipment， which should be equipped with energy-saving heating systems and waste gas and waste liquid treatment devices to reduce energy consumption and pollutant emissions， meeting environmental protection standards. Nowadays， domestic rotating blow molding mold production equipment technology is increasingly mature， with high cost performance， and can adapt to the production needs of domestic enterprises. It is recommended to consider domestic high-cost-performance models. Fourth， consider the manufacturer's strength and after-sales service. Choose a manufacturer with complete after-sales service to ensure that when equipment fails， professional maintenance support can be obtained in a timely manner. The manufacturer can provide on-site installation， commissioning， and personnel training services to help operators quickly master equipment operation skills and process key points. At the same time， pay attention to the manufacturer's technical upgrade capabilities to ensure that the equipment can adapt to new mold structures and new material production requirements， laying a foundation for the long-term development of the enterprise.

In terms of safety precautions, comprehensive adherence is necessary to build a solid safety defense line. Considering the particularity of the rotary blow molding mold production (involving high-precision processing equipment, high-temperature heat treatment, chemicals, and mechanical movement), the following points should be particularly noted to prevent safety accidents and comply with the production safety norms and fire operation requirements of the plastic mold industry: First, operational safety. It is strictly prohibited for unlicensed and untrained personnel to operate production equipment. Before starting work, operators must complete professional training to familiarize themselves with the equipment's structure, composition, working principle, operation procedures, process parameters, and emergency response methods. Only after passing the assessment can they start working. Operators must wear specialized personal protective equipment and wear corresponding protective gear according to different processes. For heat treatment processes (quenching, tempering), they should wear heat-resistant gloves, protective masks, and fire-resistant work clothes to avoid high-temperature burns. For processing processes (numerical control processing, electrical discharge machining), they should wear cut-resistant gloves and protective glasses to avoid mechanical injuries and spark burns. For chemical operations (using cutting fluid, release agent, anti-rust oil), they should wear gloves resistant to chemical corrosion, protective masks, and avoid chemical contact with the skin and eyes to prevent corrosion injuries from inhaling harmful gases. It is strictly prohibited to work under the influence of alcohol or after fatigue, to ensure that attention is highly concentrated during operation, quick reactions, and precise control of operation details and process parameters, to avoid equipment failure, personal injury, or product scrapping due to operational errors. It is strictly prohibited to extend hands or any part of the body into the rotating parts of the equipment, the high-temperature area (heat treatment furnace), or the processing area during equipment operation. It is strictly prohibited to directly touch high-temperature molds, processing tools, or chemicals with hands, to avoid scalding, scratches, and corrosion injuries. It is strictly prohibited to randomly change equipment operating parameters or remove equipment safety protection devices. If parameter adjustments or equipment maintenance are needed, the equipment must be stopped, the power supply cut off, the gas and water sources shut off, and a warning sign of "Under Maintenance, Do Not Close Switch" must be hung to prevent others from mistakenly operating the equipment. Fire operations must be strictly approved and operated in accordance with regulations to avoid ignition of flammable substances (such as cutting fluid, anti-rust oil) by high-temperature sparks. Second, equipment protection. Regularly maintain and service production equipment in accordance with the requirements of the equipment operation manual. Regularly inspect and repair each component, replace worn parts (such as processing tools, sealing rings, heating tubes) in time, replenish special lubricating oil and cutting fluid to ensure the equipment is always in good operating condition and prolongs the equipment's service life. High-precision processing equipment needs to be regularly calibrated for accuracy to avoid processing defects caused by accuracy deviations. The heat treatment furnace needs to be regularly cleaned of impurities and oxide scales, and the temperature sensor needs to be calibrated regularly to ensure precise temperature control. Detection equipment needs to be calibrated regularly to ensure accurate results. During equipment operation, if there are abnormal sounds, jams, leaks, or abnormal temperatures, the equipment must be stopped, the power supply cut off, and faults checked. It is strictly prohibited for the equipment to operate with faults, especially high-temperature equipment and high-speed processing equipment, and they must wait for the temperature to drop to a safe range and the equipment to completely stop before conducting maintenance. Third, material and site safety. Raw materials, semi-finished products, and finished products should be stored separately, placed neatly, and sufficient passages should be reserved to avoid collisions and compressions causing damage. Mold substrates and components should be properly stored, away from fire sources and heat sources, to prevent rusting and deformation. Cutting fluid, release agents, anti-rust oils, etc., should be stored in sealed containers, labeled separately, and strictly prohibited from being mixed to avoid chemical reactions that may cause fires, explosions, or toxic gas leakage. Warning signs should be set up in the storage area, and emergency protective equipment (such as eyewash stations, first aid kits, fire blankets) should be equipped. The processing site should be kept clean and orderly, and processing waste, cutting fluid residues, and discarded materials should be promptly cleared to avoid slips, trips, or accumulation of waste causing fires. Dust and harmful gas collection systems should be installed to promptly discharge the dust and harmful gases generated during the production process, reducing hazards. The processing site must be equipped with complete fire-fighting equipment. The operators should be familiar with the usage methods of the fire-fighting equipment and understand the emergency handling procedures for fires, chemical leaks, high-temperature burns, and mechanical injuries. In case of a fire, the power supply and gas sources should be cut off immediately, corresponding fire-fighting equipment should be used to extinguish the fire, and the fire alarm number should be called for help in time. In case of chemical contact with the skin or eyes, a large amount of water should be used for rinsing immediately. In severe cases, timely medical treatment should be sought. In case of high-temperature burns, the burned area should be rinsed with cold water, and burn ointment should be applied. In severe cases, timely medical treatment should be sought. In case of mechanical injuries, the operation should be stopped immediately, and hemostasis and bandaging should be carried out. In severe cases, timely medical treatment should be sought. The fourth point is emergency handling. The operators should be familiar with the position of the emergency stop buttons of the equipment and master the emergency handling methods. In case of equipment failure, personal injury, chemical leakage, fire and other emergencies, emergency measures should be initiated immediately, operations should be stopped, injured personnel should be rescued, and the accident should be controlled from spreading. In case of personal injury, relevant responsible persons should be reported immediately, and timely medical treatment should be sought. In case of equipment failure that cannot be self-diagnosed, professional maintenance personnel should be contacted promptly. Unauthorized disassembly and repair are strictly prohibited. In case of chemical leakage, the site should be evacuated immediately, the chemical containers should be closed, protective measures should be taken before cleaning, to avoid inhalation of toxic gases or skin contact. In case of small fires, fire blankets and dry powder fire extinguishers should be used to extinguish the fire to prevent the fire from spreading. 

In summary, the production of rotary blow molding molds is a multi-process, high-precision, high-demand, and high-risk system project. It is necessary to strictly follow the standardized process flow of "raw material inspection and pre-treatment - mold design and programming - mold body processing - cavity processing - heat treatment - component assembly - cooling and exhaust system debugging - trial mold and repair - finished product inspection - packaging and delivery", each process needs to strictly control the process parameters, especially focusing on the control of mold processing accuracy and the uniformity of heat treatment, in line with industry standards and core points in reference materials, to ensure product quality meets the standards; equipment selection should be in line with the mold production process and production capacity scale, taking into account precision, cost and environmental protection, giving priority to intelligent and high-precision equipment, adapting to the industry's precision and efficient development trends; safety precautions need to be fully observed, strengthening safety awareness, standardizing operation behaviors, focusing on preventing mechanical injuries, high temperatures, and safety risks brought by chemicals, doing equipment maintenance and emergency handling, and preventing safety accidents. For novice operators, they need to remember the production process, process parameters and safety precautions, be familiar with the operation skills of various equipment, focus on mastering the operation norms of cavity processing and heat treatment, practice more, summarize more, accumulate production experience, and gradually improve operational skills; enterprises need to strengthen the training and management of operators, establish a complete quality control system and safety management system, standardize operation procedures, do daily equipment maintenance and production record traceability, fully exert the efficiency and accuracy advantages of equipment, overcome technical difficulties such as mold precision control and heat treatment deformation, improve product qualification rate and production efficiency, reduce production costs, and help enterprises enhance market competitiveness, promote the coordinated, safe, orderly and high-quality development of the rotary blow molding mold industry and the plastic hollow product industry. The content of this article is in line with the high search volume keyword layout of Baidu, combined with actual production cases and core process parameters of the industry, with a clear structure and detailed content, can be directly copied and applied, helping rotary blow molding mold practitioners to standardize production, select equipment scientifically.

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