CN103909624B

CN103909624B - Mould enter plastic structure

Info

Publication number: CN103909624B
Application number: CN201310005145.6A
Authority: CN
Inventors: 刘冬飞
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2016-06-29
Anticipated expiration: 2033-01-08
Also published as: CN103909624A

Abstract

A kind of mould enter plastic structure, it is applied in plastic mould, and described plastic mould has die and die cavity, and the plastic structure that enters of this mould includes: taper pin, and it has taper pin top and taper pin rod, the product after the conflict molding of described taper pin top；Runner, it is located on described die to pass through for molten plastic；Cast gate, it is located on described die and is connected between described runner and die cavity, and this cast gate is provided with a bottom surface and is connected to two sides of this bottom surface, and this cast gate is around described taper pin top.Inventive die enter plastic structure, when adding the product of glass fibre in molding material, what not only solve product enters glue problem, but also has the effect of ejecting product.

Description

Mould enter plastic structure

[technical field]

The present invention relates to a kind of mould structure, what be specifically related to a kind of mould enters plastic structure.

[background technology]

The plastic parts of product can use plastic mould to be shaped, for instance for the plastic parts such as shell of electronic product.Universal due to electronic product, also becomes widely studied problem for the improvement of plastic mould.

When the appearance of forming plastic cement product, attractive in appearance for appearance, side should not be adopted to enter glue and pin mark enters glue；And when if the material of product is add glass fibre in plastics, for instance for polyamide adds glass fibre, after the cooling of product and runner, reason due to product material, product and runner can be hardening, hide with Cornu Bovis seu Bubali and hide into the structure of glue into glue or thimble, all cannot be broken on cast gate top.

In view of this, what be necessary a kind of new mould of exploitation in fact enters plastic structure, with the problem solving cannot be broken on cast gate top after interpolation glass fibre in above-mentioned material.

[summary of the invention]

Therefore, what it is an object of the invention to provide a kind of mould enters plastic structure, and the plastic structure that enters of this mould can solve the problem that in the material of product after interpolation glass fibre, cast gate not easily pushes up disconnected problem.

In order to achieve the above object, the mould of the present invention enter plastic structure, it is applied in plastic mould, and described plastic mould has die and die cavity, and the plastic structure that enters of this mould includes:

Taper pin, it has taper pin top and taper pin rod, the product after the conflict molding of described taper pin top；

Runner, it is located on described die to pass through for molten plastic；

Cast gate, it is located on described die and is connected between described runner and die cavity, and this cast gate is provided with a bottom surface and is connected to two sides of this bottom surface, and this cast gate is around described taper pin top.

It is preferred that the descending transition gradually of the sectional area of described cast gate, so that molten plastic quickly fills with mold cavity forming product.

It is preferred that described cast gate is extended at described taper pin top, to facilitate described taper pin and die breaking molding.

It is preferred that with mould die sinking direction for vertical direction, described taper pin is S1 in the stroke that exits of horizontal direction, and it is S2 that the width of described cast gate is extended at taper pin top, and the width of described cast gate is S3, then S1 > S2+S3, so that taper pin exits cast gate ejecting product completely.

Compared to prior art, inventive die enter plastic structure, when molding material is added the product of glass fibre, after mould matched moulds, taper pin top and die breaking sealing, molten plastic is made to fill die cavity shaped article, after mould die sinking, while taper pin exits back cast gate, also product is upwards ejected, making product separate with cast gate, the plastic structure that enters of this mould not only solves cast gate not easily by the problem that top is disconnected, but also has the effect of ejecting product.

[accompanying drawing explanation]

What Fig. 1 illustrated inventive die enters plastic structure in the schematic diagram of mould matched moulds state.

Fig. 2 illustrates the schematic diagram entering plastic structure one side of inventive die.

Fig. 3 illustrates the schematic diagram entering plastic structure another side of inventive die.

What Fig. 4 illustrated inventive die enters plastic structure in the schematic diagram of mould die opening state.

[detailed description of the invention]

Referring to shown in Fig. 1, Fig. 2 and Fig. 3, what it depicted inventive die respectively enters plastic structure in the schematic diagram entering plastic structure another side of the schematic diagram of mould matched moulds state, the schematic diagram entering plastic structure one side of inventive die and inventive die.

The mould of the present invention enter plastic structure, it is applied in plastic mould, and described plastic mould has die 100 and die cavity (not shown), and in the present embodiment, the plastic structure that enters of this mould includes:

Taper pin 200, it has taper pin top 210 and taper pin rod 220, conflicts the product 300 after molding in described taper pin top 210；

Runner 400, it is located on described die 100 to pass through for molten plastic；

Cast gate 500, it is located on described die 100 and is connected between described runner 400 and die cavity, this cast gate 500 is provided with a bottom surface 510 and is connected to two sides 520 of this bottom surface 510, one side 520 in these two sides 520 connects described runner 400, another side 520 connects described die cavity, and this cast gate 500 is around described taper pin top 210, this cast gate 500 makes molten plastic produce acceleration when entering die cavity, be conducive to quickly filling with die cavity, after molding, the molten plastic in cast gate 500 first condenses, with near closed hollow ring, prevent molten plastic from flowing backwards, cavity pressure is avoided to decline too fast, so that producing shrinkage cavity or depression on product 300.

Wherein, the descending transition gradually of sectional area of described cast gate 500, so that molten plastic quickly fills with mold cavity forming product 300.

Wherein, described cast gate 500 is extended at described taper pin top 210, and to facilitate described taper pin 200 and die 100 breaking molding, in the present embodiment, the width of described cast gate 500 is extended more than 0.5mm in taper pin top 210.

Wherein, with described mould die sinking direction for vertical direction, described taper pin 200 is S1 in the ejection stroke of horizontal direction, it is S2 that the width of described cast gate 500 is extended at taper pin top 210, the width of described cast gate 500 is S3, then S1 > S2+S3, so that taper pin 200 exits cast gate 500 ejecting product 300 completely.

Please jointly consulting shown in Fig. 1, Fig. 2 and Fig. 3, when after mould matched moulds, taper pin top 210 and die 100 breaking sealing, molten plastic flows in cast gate 500 from runner 400, and cast gate 500 makes molten plastic fill rapidly die cavity shaped article 300.

Refer to shown in Fig. 4, when, after mould die sinking, under the effect that ejects of the ejecting mechanism of mould, taper pin 200 moves obliquely, while namely taper pin 200 exits back cast gate 500, also product 300 is upwards ejected, make product 300 and cast gate 500 be easily separated.

Inventive die enter plastic structure, when molding material is added the product 300 of glass fibre, what not only solve product 300 enters glue problem, make cast gate 500 disconnected by top easily, but also there is the effect of ejecting product 300, simple in construction, and the convenient adjustment of cast gate 500 size, be beneficial to the molding of product 300.

Claims

1. mould enter a plastic structure, be applied in plastic mould, described plastic mould has die and die cavity, it is characterised in that the plastic structure that enters of this mould includes:

Runner, it is located on described die to pass through for molten plastic；

2. mould according to claim 1 enter plastic structure, it is characterised in that the descending transition gradually of sectional area of described cast gate so that molten plastic quickly fills with mold cavity forming product.

3. mould according to claim 1 enter plastic structure, it is characterised in that described cast gate is extended at described taper pin top, to facilitate described taper pin and die breaking molding.

4. mould according to claim 3 enter plastic structure, it is characterized in that, with mould die sinking direction for vertical direction, described taper pin is S1 in the stroke that exits of horizontal direction, it is S2 that the width of described cast gate is extended at taper pin top, the width of described cast gate is S3, then S1 > S2+S3, so that taper pin exits product and cast gate completely.