Two Shot Molding

Two shot molding, also called double shot moulding, dual shot injection molding，multi shot injection molding or 2k injection moulding is one category of injection molding using two different thermoplastic materials to produce injection molded parts in two colors or two components in the two shot injection molding process to producetwin shot mouldingin large quantities quickly, economically and efficiently. Multi shot molding has characteristics as below:

Two component injection molding, co-injection, two colour injection mouldingand muti-component injection are all variants of advanced molding techniques.

A combination of hard plastics and soft materials.

Two-step process is executed in a single press cycle.

Combine two or more components to eliminate additional assembly costs.

Keyplast plastic injection molding manufacturer also provides overmolding injection molding, insert injection molding and materials used in injection moulding with cheap prices. Contact us now!

Two Shot Molding Process

Two shot injection molding has two stages in the whole process.

Firstly one shot of materials is injected into a mold and cooled to form a solid part. Secondly, the mold opens and rotates 180 degrees and then closes. The second shot of materials is injected into the mold, through or around the first molded part. After sufficient cooling, the mold opens and the multi-resin molded part is ejected. 2 shot moulding has key factors as below:

Melting temperature for the materials

Wall temperature for the mold

Injection speed for the molded parts

Delay time between injections

Temperature of the components

Two Shot Injection Molding Design Guide

The mold used in two shot molding consists of different tool sets. In rotating platen settings, these two shot injection molding tools share the same core, but different cavities. The runner must be designed to close during its inactive forming step.

Wall thickness is an important two shot molding designconsideration when designing parts for a number of reasons:

Due to the molding pressure from the second step, the substrate wall should be thick enough to withstand the force without collapsing.

Walls should not exceed traditional thickness guidelines to produce effects attributable to irregular cooling.

To ensure accurate and thorough flow of 2k molding material into all parts of the cavity, the wall thickness should not fall below a certain minimum value.

Ideally, materials should be injected in a certain order, taking into account the following factors:

The first shot should be the harder plastic of the two.

If transparent and opaque materials are used, inject transparent materials first.

Generally speaking, the material with higher temperature is injected first.

For mold frame and insert design:

Make sure the mold can be rotated 180 degrees.

Any insertion should be symmetric.

The push rod plate and thimble are stabilized by a return spring to prevent damage during mold rotation.

The cooling system of double shot molding must be able to function adequately on the first and second shots.

As one of the most professional two shot molding companyand plastic mold maker china, Keyplast offers custom plastic injection moulding, two shot molding video, plastic injection china, etc. Keyplast sincerely invite you to visit our company and establish long-term business relationship with us. Contact us to know more.

Other supplier products

	Two Shot Molding	Two shot moulding, also called double shot injection molding, double shot moulding, multi shot injection molding or 2k injection moulding is one ca...
	Plastic Injection Molding	What is plastic injection molding? Plastic Injection molding is a molding method that combines injection and molding. The advantages of plastic sma...
	Over Molding	Over molding is a special plastic molding process. Overmolding insert moldingis similar to the two-color molding or two-shot molding process. Metal...
	Injection Molding Surface Finish	Injection Molding Surface Finish Do not use the finest whetstone, sandpaper, or abrasive polishing paste at the beginning of mold polishing, as yo...
	Injection Mold Design Engineering	Injection Mold Design Engineering Injection mold engineeringis a procedure at the first stage of injection molding process, which develops the inj...

All supplier products

Same products

	Air-Cooled Water-Cooled Drum Cooler Machine	Seller: Hebei Guoning Heavy Industry Manufacturing Co., Lt	Air-Cooled Water-Cooled Drum Cooler Machine TheFoundry Sand Drum Coolerby Guoning is a high-perf...
	Voc tail gas treatment equipment For Lost Foam Casting	Seller: Hebei Guoning Heavy Industry Manufacturing Co., Lt	Voc tail gas treatment equipment For Lost Foam Casting TheVOC Exhaust Gas Treatment SystemforLos...
	Airbag 3D vibration table	Seller: Hebei Guoning Heavy Industry Manufacturing Co., Lt	Airbag 3D vibration table (molding) The3D Vibration Tablefor Lost Foam Castingis designed forsan...
	Bottom-turning hydraulic box turner machine	Seller: Hebei Guoning Heavy Industry Manufacturing Co., Lt	Bottom-turning hydraulic box turner machine The hydraulic box flipping machine mainly consists o...
	Water ring sand temperature cooler	Seller: Hebei Guoning Heavy Industry Manufacturing Co., Lt	Water ring sand temperature cooler Main technical parameters Size: φ2000/φ2500/φ290...