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.
在线联系供应商
Other supplier products
 |
Gardening Injection Molding | Keyplast brings every concept into a reality, not only for every client, but also for our own development in all areas, especially in gardening ind... |
 |
Insert Molding | Insert MoldingService Insert molding is one category of custom injection moldingthat allows preformed parts or components, usually metal inserts, ... |
 |
Plastic Injection Molding | What is plastic injection molding? Plastic Injection molding is a molding method that combines injection and molding. The advantages of plastic inj... |
 |
What is the Difference Between Overmolding and Insert Molding? | What Is the Difference between Insert Molding and Overmolding Plastic injection molding is one of the most widely used processes for manufacturi... |
 |
Market Status Of China's Mold Manufacturing Industry | In recent years, due to the continuous improvement of China's industrialization, China has become a major mold manufacturing country and a major mo... |
Same products
 |
90度弯管机GT-WGQD90 | 卖方: 肇庆古雷特科技有限公司 | * 说明 GT-WGQD90自动弯管机加热元件自动弯管90度。适用于管式发热管，双腿弯管90度。 * 主要细节 1.自动进给发热管、自动弯管、自动卸载弯管发热管。 2、加热器最大弯曲长度... |
 |
GT-ATH201自动上下料退火机 (无水冷） | 卖方: 肇庆古雷特科技有限公司 | * 描述短路型退火机，主要用于发热管进行退火，其经过缩管后，表面很硬，如果不进行退火，弯曲位置过小，很容易被折断或开裂，退火后，使发热管变软.该机采用干式变压器，配有气动夹紧机构，将管材夹紧在两... |
 |
GT-LS202 拉伸机 | 卖方: 肇庆古雷特科技有限公司 | * 描述 拉伸机主要针对收缩后长度不等的加热器，需要拉伸至相同长度。该机采用液压系统，拉伸稳定，效率高。 * 主要细节 1.对于长度小于2米的加热器，机器可以自动进料，自动卸料（如果长度超过2... |
 |
GT-CG30PLC 自动车管机 | 卖方: 肇庆古雷特科技有限公司 | * 描述 GT-CG30PLC自动车管机机是管式加热器的高效设备。机器自动修剪加热器两端。 * 主要细节 1、自动送料、自动对中； 2、自动切边、自动下料； 3、具有报警指示； 4、... |
 |
DS-JB Manual Paper Cake Cup/Tray Forming Machine | 卖方: Wenzhou Desu Machinery Co., Ltd. | DS-JB Manual Paper Cake Cup/Tray Forming Machine Advantanges: Customzied shape and sizeEasy to ... |
