液态硅酮注射成型工艺和异常处理？

Liquid silicone injection molding is a high-precision and high-efficiency molding method. Silicone is injected into the mold through an injection molding machine and quickly solidified by high temperature and high pressure. The advantage of injection molding is that it can produce products with complex shapes and products of various colors.

Liquid Silicone Injection Molding

Introduction to liquid silicone injection molding process

Liquid silicone injection molding uses liquid silicone as the main raw material. The two-component material (Part A and Part B) is mixed with a screw and injected into the mold for vulcanization molding. This process can produce high-quality products with the advantages of no waste and automation. Liquid silicone products are soft and widely used to simulate human organs, medical silicone chest pads, etc. In addition, liquid silicone has good thermal stability, cold resistance, and electrical insulation properties. No poisonous substances are produced when burned. Therefore, it has become an irreplaceable material in producing and designing health products, automobiles, baby products, medical products, diving products, kitchen utensils, and seals.

Advantages of liquid silicone injection molding:

  • High precision
  • High production efficiency
  • Low loss
  • Higher level of automation
  • Low contamination rate

Disadvantages of liquid silicone injection molding:

  • High requirements for equipment and molds
  • High cost of equipment, molds, and materials
  • Sensitive to humidity

Liquid Silicone Injection Molding

Liquid Silicone Injection Molding Process Flow:

Liquid Silicone Injection Molding

The metering device first pumps a 1:1 mixture of LSR A and B components, distributes it to a static or dynamic mixer, and then distributes it to the metering cylinder of the injection molding machine. Once the two ingredients are mixed, the material can be injected into the corresponding mold. The screw conveyor in the injection cylinder is responsible for injecting and metering the mixed material.

Note: The metering cylinder and agitator temperature do not exceed 40°C.

ClassificationCausesCountermeasures
 

 

 

 

 

 

Bubble Stains

Insufficient vulcanizationExtended vulcanization time
The air is not completely evacuated.Fully evacuate the air from the portable tank
Air mixed inBe careful to prevent air from entering during the injection
Mold temperature is too highLower mold temperature and pay attention to mold temperature distribution
Mixing spotsAdjust injection speed, check agitator
 

 

 

 

 

 

Raw Edges

Too much injection volumeAdjust injection speed and increase clamping force
There is dust on the parting surfaceControl the workshop environment and close the protective cover during molding
Lower clamping forceIncrease clamping pressure
Injection pressure is highAdjust injection pressure
The holding time is too longSelect a suitable holding time
 

 

 

 

Expansion

Insufficient vulcanizationExtend the vulcanization time and increase the temperature
Insufficient molding pressureIncrease pressure
Generate bubblesFully remove the air from the portable tank
Uneven vulcanizationAdjust the heating device
 

 

 

Poor gloss

Insufficient vulcanizationExtend the vulcanization time and increase the temperature
Rough mold surfaceMold electroplating, replacement of release agent
 

Poor demoulding properties

Insufficient vulcanizationExtend the vulcanization time
Poor mold surfaceImprove mold
Uneven surface temperature distributionCheck heating method
Nozzle leakageNozzle wear and tearCheck the nozzle lock

In addition to material selection, mold development, and setting optimal parameters in the liquid silicone injection molding process, regular equipment maintenance and mold maintenance are also crucial. The production unit strictly controls each process to avoid unnecessary abnormalities and waste.

珠宝生活 provides a full range of cost-effective liquid 硅胶产品  and accurately recommends materials to customers, providing one-stop silicone product procurement and OEM/ODM solutions

相关职位

Introduction to Silicone Manufacturing Silicone manufacturing is a specialized industry that requires a deep understanding of material science, chemical engineering, and environmental management. As a leading silicone factory, we pride ourselves on our ability to create custom silicone products tailored to the unique needs of our wholesale clients. This article delves into the manufacturing process, health and safety considerations, and the management strategies that ensure the highest standards of quality and compliance. 1. The Manufacturing Process of Silicone 1.1 Overview of the Manufacturing Process The silicone manufacturing process involves the transformation of raw silicone materials into finished products through curing and vulcanization. Curing refers to the process where silicone compounds harden through the addition of heat or moisture, while vulcanization involves the use of catalysts to speed up the hardening process. Over the years, we have perfected these processes to ensure the production of durable and high-quality silicone products. Curing with Peroxides During the vulcanization process employing peroxides, peroxides are incorporated into the silicone compound, which triggers a reaction leading to material solidification. This approach is renowned for its dependability and its capability to attain broad hardness levels in the end products. It is applicable for general silicone rubber goods, like those used in wires and cables, and also for oil-resistant and solvent-resistant silicone rubbers. Vulcanization with Platinum Catalysts On the other hand, vulcanization using a platinum catalyst is a more specialized process that allows for exceptional control of the reaction and produces items with superior purity and performance. This method is particularly suited for manufacturing custom silicone products that require high precision and consistency. It is ideal for products where environmental protection and hygiene conditions are of higher concern, such as food-grade silicone products and medical devices. 1.2 Chemical Composition and Volatile Emissions The chemical composition of silicone materials includes base polymers, fillers, and additives. Additives play a crucial role in enhancing the properties of silicone products, such as flexibility, heat resistance, and UV stability. Curing agents and catalysts are essential for initiating and controlling the polymerization reactions that lead to the formation of the silicone product. 1.3 Common Volatiles in Silicone Manufacturing During the manufacturing process, various volatile organic compounds (VOCs) can be emitted, including methyl siloxanes and other siloxane oligomers. These emissions can have environmental and health implications, which is why our silicone factory has implemented stringent measures to minimize their release. 2. Health, Safety, and Environmental Impact 2.1 Health and Safety Risks in the Manufacturing Environment The health and safety of our workers is paramount. In the silicone manufacturing environment, exposure to uncured silicone, catalysts, and other chemicals can pose risks. Therefore, we have established safety measures and protocols that include the use of personal protective equipment (PPE) and regular health check-ups for our employees. 2.2 Impact of Volatiles on the Environment The release of volatiles into the environment can contribute to air pollution and have long-term effects on ecosystems. As a responsible silicone factory, we are committed to reducing our environmental footprint by adopting advanced technologies that minimize VOC emissions and by recycling waste materials whenever possible. 2.3 Regulatory Compliance and Standards Adherence to regulations is a cornerstone of our operations. Both national and international standards, such as those set by the European Union's REACH regulations and the United States' EPA guidelines, dictate the allowable levels of VOC emissions and the safety measures that must be in place. Our silicone factory is fully compliant with these standards, ensuring that our operations are both safe and environmentally responsible. 3. Management Strategies 3.1 Implementing Safety Measures and Protocols To safeguard our workers and the environment, we have implemented a range of safety measures and protocols. These include the use of closed-loop systems to capture and treat emissions, regular equipment maintenance to prevent leaks, and comprehensive training programs for our staff. 3.2 Advancements in Process and Material Technology Innovation is at the heart of our silicone manufacturing process. We continuously invest in research and development to improve our manufacturing processes and material technologies. This includes exploring new catalysts that reduce VOC emissions and developing silicone compounds with enhanced properties for applications like silicone lunch boxes and water bottles. 3.3 Regulatory Compliance and Environmental Management Our commitment to regulatory compliance extends beyond mere adherence to standards. We actively engage with regulatory bodies to ensure that our practices are not only compliant but also contribute to the development of more stringent environmental protections. Our environmental management system is certified to ISO 14001, demonstrating our dedication to sustainable practices. 4. Conclusion Silicone manufacturing is a complex process that requires a delicate balance between product quality, worker safety, and environmental responsibility. As a silicone factory specializing in custom silicone products, we are committed to maintaining the highest standards across all aspects of our operations. By investing in advanced technologies, adhering to strict safety protocols, and prioritizing environmental stewardship, we ensure that our silicone products meet the needs of our wholesale clients while also protecting the health of our workers and the planet.
优质有机硅制造：兼顾安全性和可持续性
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Celebrating Success and Looking Forward: Shenzhen Jewelives Industrial Co., Ltd.'s Annual Gala
Liquid Silicone Injection Molding
液态硅酮注射成型工艺和异常处理？
Custom Silicone Products
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