CN103909624A

CN103909624A - Plastic feeding structure of die

Info

Publication number: CN103909624A
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: 2014-07-09
Anticipated expiration: 2033-01-08
Also published as: CN103909624B

Abstract

A plastic feeding structure of a die is used in a plastic die, and the plastic die has a die core and a cavity. The plastic feeding structure of the die comprises: an inclined pin, wherein the inclined pin has an inclined pin top and an inclined pin rod, and the inclined pin top contacts a molded product; a channel arranged on the die core in order to realize the flow-through of a molten plastic; and a cast gate arranged on the die core and connected between the channel and the cavity, wherein the cast gate is provided with a bottom surface and two side surfaces connected to the bottom surface, and the cast gate encircles the inclined pin top. During molding a product of a material containing glass fibers, the plastic feeding structure of the die solves the plastic feeding problem of the product, and has a product ejection effect.

Description

Mould enter plastic structure

[technical field]

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

[background technology]

The plastic parts of product can use plastic mould to carry out moulding, for example, be the plastic parts such as the shell of electronic product.Due to popularizing of electronic product, also become the problem of broad research for the improvement of plastic mould.

In the time of the appearance of forming plastic cement product, attractive in appearance for appearance, should not adopt side to enter glue and pin mark enters glue; And if the material of product is while adding glass fibre in plastics, for example, add glass fibre in polyamide, after product and runner are cooling, due to the cause of product material, product and runner meeting hardening, hide and hide into the structure of glue into glue or thimble with ox horn, all cannot be by disconnected cast gate top.

In view of this, be in fact necessary to develop a kind of plastic structure that enters of new mould, cast gate cannot be pushed up to disconnected problem to solve after adding glass fibre in above-mentioned material.

[summary of the invention]

Therefore, the object of this invention is to provide a kind of plastic structure that enters of mould, the entering plastic structure and can solve in the material of product and add after glass fibre of this mould, cast gate is difficult for the disconnected problem in top.

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

Taper pin, it has taper pin top and taper pin bar, the product after the conflict moulding of described taper pin top;

Runner, it is located on described die and passes 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 in two sides of this bottom surface, and this cast gate is around described taper pin top.

Preferably, the descending transition gradually of the sectional area of described cast gate, so that molten plastic is full of rapidly mold cavity forming product.

Preferably, described cast gate is extended at described taper pin top, to facilitate described taper pin and die breaking moulding.

Preferably, take mould die sinking direction as vertical direction, described taper pin is S1 in the stroke that exits of horizontal direction, the width that described cast gate is extended at taper pin top is S2, the width of described cast gate is S3, and S1>S2+S3, so that taper pin exits cast gate ejecting product completely.

Compared to prior art, mould of the present invention enter plastic structure, add the product of glass fibre in moulding material time, after mould matched moulds, taper pin top and die breaking sealing, make molten plastic fill die cavity shaped article, after mould die sinking, when taper pin exits cast gate backward, also product is upwards ejected, product is separated with cast gate, and the plastic structure that enters of this mould has not only solved the disconnected problem in cast gate difficult quilt top, but also has the effect of ejecting product.

[accompanying drawing explanation]

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

Fig. 2 illustrates the schematic diagram that enters plastic structure one side of mould of the present invention.

Fig. 3 illustrates the schematic diagram that enters plastic structure another side of mould of the present invention.

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

[specific embodiment]

Refer to shown in Fig. 1, Fig. 2 and Fig. 3, what it had illustrated respectively mould of the present invention enters plastic structure in the schematic diagram that enters plastic structure one side of the schematic diagram of mould matched moulds state, mould of the present invention and the schematic diagram that enters plastic structure another side of mould of the present invention.

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

Taper pin 200, it has taper pin top 210 and taper pin bar 220, the product 300 after the 210 conflict moulding of described taper pin top;

Runner 400, it is located on described die 100 and passes 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 in two sides 520 of this bottom surface 510, side 520 connects described runner 400 one of in these two sides 520, 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 in the time entering die cavity, produce acceleration, be conducive to be full of rapidly die cavity, the first condensation of molten plastic after moulding in cast gate 500, with near closed hollow ring, prevent that molten plastic from flowing backwards, avoid cavity pressure to decline too fast, so that produce shrinkage cavity or depression on product 300.

Wherein, the descending transition gradually of the sectional area of described cast gate 500, so that molten plastic is full of rapidly 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 moulding, in the present embodiment, the width that described cast gate 500 is extended at taper pin top 210 is greater than 0.5mm.

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

Please jointly consult shown in Fig. 1, Fig. 2 and Fig. 3, when after mould matched moulds, taper pin top 210 and die 100 breaking sealings, 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, when taper pin 200 exits cast gate 500 backward, also product 300 is upwards ejected, and product 300 is separated easily with cast gate 500.

Mould of the present invention enter plastic structure, add the product 300 of glass fibre in moulding material time, what not only solved 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 structure, and convenient adjusting of cast gate 500 sizes, be beneficial to the moulding of product 300.

Claims

Mould enter a plastic structure, be applied in plastic mould, described plastic mould has die and die cavity, it is characterized in that, the plastic structure that enters of this mould comprises:

Taper pin, it has taper pin top and taper pin bar, the product after the conflict moulding of described taper pin top;

Runner, it is located on described die and passes 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 in two sides of this bottom surface, and this cast gate is around described taper pin top.
Mould according to claim 1 enter plastic structure, it is characterized in that, the descending transition gradually of sectional area of described cast gate, so that molten plastic is full of rapidly mold cavity forming product.
Mould according to claim 1 enter plastic structure, it is characterized in that, described cast gate is extended at described taper pin top, to facilitate described taper pin and die breaking moulding.
Mould according to claim 3 enter plastic structure, it is characterized in that, take mould die sinking direction as vertical direction, described taper pin is S1 in the stroke that exits of horizontal direction, the width that described cast gate is extended at taper pin top is S2, the width of described cast gate is S3, and S1>S2+S3, so that taper pin exits product and cast gate completely.