Email:info@eoexport.com Liaoning EO Technology Co.,Ltd

Liaoning EO Technology Co.,Ltd

The Difference Between Two Times Forming Mould And Double Color Mould

Double-color mold: Two kinds of plastic materials in the same injection molding machine injection molding, divided into two times, but the product only die once mold.
In general this molding process is also called double injection molding, usually by a set of molds, and the need for specialized Two-color injection molding machine. Package Plastic mold (two times): Two kinds of plastic materials are not necessarily in the same injection molding machine injection molding, divided into two times, the product from a set of molds out of the mold, and then put into another set of molds for the second injection molding.
Therefore, generally this molding process is usually done by 2 sets of molds, without the need for specialized Two-color injection molding machine.
Overview of two-time molding mould (plastic mould) and Two-color mould
Two mold in the design should pay attention to the positioning of hard rubber parts, the need to be reliable sealing glue and on the plastic parts have a reverse slope hole to prevent the deformation of the gel.
Double-color mold is now increasingly popular in the market, in this process can make the appearance of the product more beautiful, easy to change color and can not spray, but expensive, technical requirements high. 1. The two shapes of cavity are different, forming 1 kinds of products respectively.
And the two shapes of the core are exactly the same. 2. Before and after the die with the center rotation 180o, must match.
This check action must be done at design time. 3. Note the position of thimble hole, the minimum distance of 210mm. The large mould shall be suitably increased in number of the top stick holes. And, because the injection molding machine itself with the thimble is not long enough, so our mold must be designed with a long thimble, thimble long out mold base 150mm or so.
2 locating rings must be designed on the back die bottom plate. 4. The total thickness of the front die panel plus a plate must not be less than 170mm.
Please take a closer look at the other reference data for this type of injection molding machine, such as the maximum modulus thickness, the minimum modulus thickness, and the distance between the top rod holes. 5. The water port of the Sanbanxi mold is best designed to be able to automatically demoulding action.
Special attention should be paid to the soft glue mouth demoulding action is reliable. 6. The depth of the front side sprue should not exceed 65mm.
The distance from the top of the sprue to the center of the mold is not less than 150mm. 7. In the design of the second injection of the cavity, in order to avoid cavity plug (or rub) the first time has been formed a good plastic products, you can design a part of the space.
However, we must carefully consider the strength of each seal, that is: in injection molding, whether there will be in the large injection pressure, plastic deformation, resulting in a second injection may have the possibility of a batch front?
8. Injection molding, the first injection molding product size can be slightly larger, so that it can be in the second molding with another cavity pressure tighter to achieve the role of sealing gum.
9. Note that in the second injection, plastic flow will be impulsive the first time has formed a good product, so that its plastic deformation? If this is possible, we must try to improve it.
10. Before the A, b plate close the mold, should pay attention to the front die slider or lifter will be first reset and pressure bad products? So, we must find ways to make the A, B plate before the die, after the slider or LIFET can be reset.
11. Two cavity and core's water arrangement is as full as possible and balanced. 12.99% of the situation is the first injection molded parts of the hard rubber, and then injection molded parts of the soft plastic products.
Because the soft rubber is easy to deform. 13. In order to make the two kinds of plastic "sticky" tighter, consider the material between the "sticky" and mold surface roughness.
Dual-color injection molding has a special TPU, and the smoother the surface of the mold, they "sticky" more tightly.
14. Pay attention to the positioning of the model before and after, all inserted, by the face of the slope drop as much as possible, to 0.1mm or more. 

Copyright © Liaoning EO Technology Co.,Ltd All Rights Reserved.
QR Code