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Structural design and precautions of left and right Haval sliders of plastic mold "two-color mo

Time：2023-02-16 08:46:12 / Popularity： / Source：

First color Material: PA6 + GF30%
Secondary color Village quality: TPE
Above two materials have good adhesion.
Structural design 
As picture shows:
Shape of product has LOGO and logo, and there is a straight body surface, all of which use two sliders to pull core.
Structural design 
Soft rubber TPE joint is on the side of female mold, and side of male mold can be completely consistent.
As picture shows:
Structural design 
Hard glue adopts 3 points of glue to ensure roundness of product.
Soft rubber mouth cannot have a glue feeding point, so 2 points of diving are used to feed glue.
Structural design 
As picture shows:
Soft TPE into glue style.
Structural design 
As picture shows:
Primary and secondary color hot runner styles
Structural design 
As picture shows:
Second color feeds glue, open hot runner turns submersible feed, and sprue adopts a spring-pulling needle to ensure that runner remains on back mold side,
Note: Addition of a spring under pulling needle is also a slight innovation in design.
Structural design 
As picture shows:
When slider withdraws full distance, ejector plate on injection molding machine is used to push ejector plate to push ejector pin, so that spring is preloaded, so that second color cold runner is ejected.
Note: Withdrawal distance of slider needs to be very precise, and tolerance is controlled within ±0.5mm.
Structural design 
As picture shows:
Product ejection style.
Mould design 
As picture shows:
Overall structure of mold Figure 1
Mould design 
As picture shows:
The overall structure of mold Figure 2
Mould design 
As picture shows:
Injection position of the first color and second color of injection molding machine.
Mould design 
As picture shows:
Side plan view of movable mold, after the first color is produced, it is rotated 180 degrees, and then second color is produced.
Mould design 
As picture shows:
When second color of soft TPE is injected, but the first color of hard plastic should be avoided in area where there is no sealing position.
Mould design 
Mould design attention points:
1. Shrinkage rate of product is based on PA6+30%GF;
2. Front mold inserts must be cooled with additional water channels;
3. Slider waterway should match front die waterway;
4. In order to prevent hard glue from being pulled too tightly during mold opening process, it will pull product and cause dislocation of second-color wrapping glue.
5. Reset of top plate structure and accuracy of sliding block cooperation ensure reliability of reset. A micro switch is added to thimble plate, and a thread is added to the top of top stick hole, and an injection molding machine is used for reset.
Last article：Injection Molding Process Technical Guide Next article：Two-color injection mold design for electric shaver battery cover

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