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Liquid Silicone Rubber Mold Design with Cold Runner
Liquid silicone rubber molds, also known as L-type molds or silicone injection molds, are molds designed according to the feeding system of liquid silicone rubber material, the state of silicone material, the mold runner system and the type of silicone molding machine, etc. They have the advantages of saving LSR material, long mold life, high
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Description
LSR Injection Mold with Cold Runner System
ISR Injection Mold’s Cold Runner system plays the same role as Hot Runner system for Plastic Injection Molding.According tomold runner system.ISR injection molding can be classified into two types:cold runner ISR mold and hot runner liouid silicone mold.
Cold runner system of Liquid Injection Mold keeps the liquid silicone cold until the Liquid Silicone Rubber inject into the hot cavities of the mold. So cold runner system can save a lot of material. Reduce waste.
In LSR imjection mold, there are piston plate, manifold and insulation plaste where the cold runner system is located. Cooling watechannel and piston needle valve consititute the cold runner system. Both play important parts in LSR injection molding process”ooling water keep running in the channel in order to prevent liguid silicone material from curing. And the piston needle valvecontrols accurate amount of raw material uniformly flowing to cavities and ensure a high quality LSR part.
YJC provids one-stop liquid silicone molding process service Including
1.Bridge tooling
2.Functional prototyping
3.Low-volume production
4.Production
5.Various stocked liquid silicone,from FDA to medical silicone certified
Overview of Liquid Silicone Injection Molding
LSR Moulding is a manufacturing process that involves injecting liquid silicone into a mold cavity under high pressure.
The LSR injection Molding process is similar to plastic injection molding but uses liquid silicone instead of plastic. The liquid silicone is cured in the mold cavity to produce the final product.
Liquid Silicon Injection Molding has become a popular manufacturing technique in recent years because of its ability to produce high-quality rubber products with tight tolerances and complex geometries.
The process is ideal for producing small to medium-sized parts in large volumes.
There are the following forms during liquid silicone injection mould design:
1) Hot Runner with Edge Gate
It is a waste of materials, simple design, low cost, and mostly used for large products.
2) Cold Runner with Needle Valve
It can realize automation and short cycle.
3) Cold runner without Needle Valve
Due to the high expansion coefficient of LSR, it will expand when heated, but it will shrink slightly when cooled, so the parts can not keep accurate side distance in the mold. Therefore, cold channel processing can be used, LSR should keep low temperature and fluidity, cold channel adopts closed system, in the injection cycle, the closed system uses “sealing needle” or “needle valve” in each channel to control the accurate measurement of LSR material.
Free Engineer Early involvement/Design Support (DFM).
Custom Liquid Silicone Rubber Mold LSR Plastic Injection Molding Design with Cold Runner
Liquid Silicone Rubber Mold Design with Cold Runner
In liquid silicone rubber mold design, there are the following forms:
1) Hot Runner
It is a waste of materials, simple design, low cost, and mostly used for large products.
2) Cold Runner with Needle Valve
It can realize automation and short cycle.
3) Cold runner without needle valve
Due to the high expansion coefficient of LSR, it will expand when heated, but it will shrink slightly when cooled, so the parts can not keep accurate side distance in the mold. Therefore, cold channel processing can be used, LSR should keep low temperature and fluidity, cold channel adopts closed system, in the injection cycle, the closed system uses “sealing needle” or “needle valve” in each channel to control the accurate measurement of LSR material.
LSR Iniection Mold Cold Runner Svstem Main Function
- Save time and material within LSR project.
- Higher-quality liquid silicone part production.
- LSR cold runner mold is beneficial to large volume production.
- Liquid injection mold with cold runner can accelerate production andits mold service time is longer.
LSR and LIM’s Benefits
1.LSR is transparent, durable, and ultraviolet and stain resistant.Compared with common rubber, LSR can withstand extreme high and low temperatures, can used in hot and cold environments.
2.LSR can be molded to varying wall thicknesses, within the same part, enabling ease of manufacturing for complex devices, ideal for intricate designs and close-tolerance parts.
3.LSR is liquid fluid, can molded to different thickness easily, can achieve strict tolerance. It’s a better choice for high precision and difficult structure products.
4.LSR Injection Mold’s designs are simplified, as liquid silicone rubber flows readily into very thin cross section. Liquid Injection Mold’s surfaces do not have to be highly polished.
5.LSR Injection Mold’s cure cycle is shot, as the silicone is fully cured, the product is finished with no or less flashing, which can improve efficiency.
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