Silicone Rubber Injection Molding

Silicone Rubber Injection Molding

ISO Class 8 Clean Room
Quality Control
Low & High Volume Manufacturing
Competitive Price
Reliability and Stability

Silicone rubber injection molding has more than a half-century history since the late 1970s. There are two molding ways of silicone rubber injection molding process: Liquid Silicone Rubber Injection Molding (LSR) and Solid Silicone Rubber Molding. There are thousands of applications of silicone rubber injection molding in various industries like medical, automotive, electronics, etc.

As the one of professional silicone injection molding companies, Packson has been working with silicone rubber injection moldnig for many years. Especially for liquid silicone rubber injection molding, we have become OEMs supplier of BD medical for producing medical rubber cathethers. We have the capability to offer liquid silicone rubber injection molding service that start from prototyping to serial production manufacturing.

At Packson, we have equipped with more than 9 liquid silicone rubber injection molding machines with ISO class 8 cleanroom that meets the need of medical contract manufacturing. We are able to provide quick, high-quality service and our professional engineering team who has rich experience in medical plastic parts&liquid silicone rubber injection molding, to help you in the whole project process. Contact Packson today if you need liquid silicone rubber injection molding service.

Silicone Rubber Injection Molding Video

Silicone Rubber Injection Molding Details and Options

                                                                                 Silicone Injection Molding Details and Options
Lead timeMake your mind in real in 10-30 days; including 24-hour quote responses with design-for-manufacturing (DFM) feedback
What kind of products should Choose LSRDrug delivery systems
Skin contact devices
Syringe stoppers
How to Choose LSR/HCR in your projectDetermining whether LSR or HCR injection moulding is the best choice for your project depends largely on how much production you will need. In general, HCR injection molding is better applied for small volume production. On the contrary, LSR injection molding is more suitable for massive production.
LSR VS TPEAdvantages:
Reasonable wall thicknesses
Cored uniform wall thickness
No sharp corners
Gradual transition from thick to thin thickness
Not for high heat or extreme cold applications
Not inherently UV stable
Need to follow conventional good plastic part design guidelines


Consumer Products;

Special Applications;

Medical And Healthcare Consumables And Devices

Benefits of LSR in Medical areasHigh Biocompatibility
Inorganic and hypoallergenic nature
Lack of odor/taste
Ozone & UV-safe
Thermal stability
Lifetime service of the part
Benefits of LSR SolutionReduce waste
Leverage the material's characteristics
Deliver consistently high precision parts and components
And all of these at global competitive conditions
Mold CavitiesSingle, Multi-cavity, and Family molds;
Machines Available200 press tonnage
Inspection and Certification OptionsISO9001,ISO13485,ISO 7&8 Medical Clean Room Molding
Mold LifeLess than 5000 shots
The Tolerances in the SteelMaintain the tolerance ±0.005mm/0.002inch
The Tolerances in the partMaintain the tolerance ±0.01mm/0.005inch
MaterialStandard Silicone
Medical-grade silicone
Optical-grade silicone
Mold FinishPM-FO TO & F1
SP1 C1 TO A2
Other OptionsConsultative Design and Tool Services for free
Final Finishing Options
Quick-turn shipping in as fast as 1 day

Custom Silicone Rubber Injection Molding Service For Your Business

Liquid silicone rubber injection molding parts have the feature of durability with good tensile strength and are used to high volume, tight tolerance. Therefore it is widely used in various industries especially for medical parts.

Here are the advantages of liquid silicone rubber:

  • Excellent insulating properties, good for tight tolerance/precision components

  • Good tensile strength  with high/low-temperature extremes

  • Good resistance for water, oxidation also some chemical solutions like acids.

Silicone Rubber Injection Molding Process

Silicone Rubber Injection Molding Process
  • The silicone dousing unit starts in two parts

Composed A and composed B pumps one Part A silicone and one Part B silicone via separate hoses to the static mixer. Cylinder A contains the basic material. while cylinder B contains a catalyst. In addition,  color is pumped to the static mixer via another hose. The mixed components are then fed into the throat of the injection molding barrel by way of a shut-off valve. This is the whole silicone rubber injection molding process.

  • Sealing against the Silicone Rubber Molded Parts

Once the silicone material is inside the barrel, a shot of the cool mixed silicone advances to the mold as the nozzle seals firmly against the silicone rubber liquid mold.

  • Injection

The nozzle shut-off valve opens and a measured shot of cool liquid silicone is injected into a hot (275F to 390F) clamped silicone rubber molded parts.

  • Barrel retracts from the mold

The nozzle shut-off valve opens and the barrel retracts from the silicone rubber liquid mold, while the screw begins to build another measured shot of cold liquid silicone.

  • Closes and repeats the procedure

After the cycle is complete, the mold opens and the piece and flashing can be taken off automatically or by an individual worker.  After that, the mold closes and repeats the procedure.

  • Post-molding process

After removing the article from the mold, the post-molding process may include demisting, post-curation, inspection, and packing.

Silicone Rubber injection Molding Application

Silicone Rubber injection Molding Application

Molding Parts

-Silicone rubber injection molding can be qpplied in molding parts. Moulded part is a good way for low quantity production from dozen to hundred of the part even millions of parts. The molding part is better than the part machined by CNC or 3D printing with the same material. The right choice for resin used in the molding part allows for a wide range of properties. Mold is essential medial for the molding part. So molds machined by CNC and Wire cut EDM with high precision and tolerance are enable make thousands of parts.


-We cercitified with ISO9001, ISO13485 and equipped with ISO 8 medical cleanroom molding

Rapid Prototye

-Rapid processing mold with low cost and enable to make molded products with 10 days at a competitive price.

Packson - Your Injection Moulding Manufacturer
Your Expert in Injection Molding

ISO Class 8 Clean Room

Equipped with clean room and certificated with ISO 13485 and ISO 9001, we are able to hanlde your medical OEMS production.

Quality Control

We will check color, appearnce and tolerance by qulity control at every step during manufacturing process.

Low & High Volume Manufacturing

Except long run production, we also can provide better solution for your low-volume production by prototyping tooling.

Competitive Price

Our good investments in euipments and QC system help us to get greater efficiency and higher quality which decrease reject ratio. All these make us send parts to you on time with competitive cost.

Reliability and Stability

Our 24 hours|3 shifts production system help your parts get into market quickly and steadily.

Contact US






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