CN203092947U

CN203092947U - Plastic feeding structure of mold

Info

Publication number: CN203092947U
Application number: CN 201320006768
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: 2013-07-31
Anticipated expiration: 2023-01-08

Abstract

The utility model relates to a plastic feeding structure of a mold. The plastic feeding structure is applied to a plastic mold. The plastic mold is provided with a mold core and a die cavity. The plastic feeding structure of the mold comprises an oblique pin, a runner and a pouring gate, wherein the oblique pin is provided with an oblique pin top and an oblique pin rod, and the top of the oblique pin pushes against a molded product; the runner is arranged on the mold core and used for the molten plastic to pass through; and the pouring gate is arranged on the mold core and arranged between the runner and the die cavity, the pouring gate is provided with a bottom surface and two side surfaces which are connected to the bottom surface, and the pouring gate surrounds the top of the oblique pin. According to the plastic feeding structure of the mold, when the glass fiber is added in the molding material, not only can the plastic feeding problem of a product be solved, but also an effect for ejecting the product can be realized.

Description

Mould advance plastic structure

[technical field]

The utility model relates to a kind of mould structure, is specifically related to a kind of plastic structure that advances of mould.

[background technology]

The plastic parts of product can use plastic mould to carry out moulding, for example is plastic parts such as electronic product shell.Because popularizing of electronic product also becomes the problem of broad research at the improvement of plastic mould.

When the appearance of forming plastic cement product, attractive in appearance for appearance should not adopt the side to advance glue and pin mark advances glue; And if the material of product is when adding glass fibre in the plastics, for example to add glass fibre in the polyamide, after product and runner cool off, because the cause of product material, product and runner can hardening, with ox horn glue or the thimble into structure of glue of hiding of hiding into, and all can't the cast gate top is disconnected.

In view of this, be necessary in fact to develop a kind of plastic structure that advances of new mould, add in the above-mentioned material can't be with the disconnected problem in cast gate top behind the glass fibre to solve.

[summary of the invention]

Therefore, the purpose of this utility model provides a kind of plastic structure that advances of mould, this mould advance plastic structure can solve in the material of product add glass fibre after, cast gate is difficult for the disconnected problem in top.

In order to achieve the above object, mould of the present utility model advance plastic structure, it is applied in the plastic mould, described plastic mould has die and die cavity, the plastic structure that advances 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 the described die and passes through for molten plastic;

Cast gate, it is located on the described die and is connected between described runner and the 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 is so that molten plastic is full of the mold cavity forming product rapidly.

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

Preferably, be vertical direction with mould die sinking direction, described taper pin is S1 in the stroke that withdraws from of horizontal direction, the width that described cast gate is extended at the taper pin top is S2, the width of described cast gate is S3, then S1〉S2+S3, so that taper pin withdraws from cast gate fully and ejects product.

Compared to prior art, the utility model mould advance plastic structure, when in the moulding material, adding the product of glass fibre, behind the mould matched moulds, taper pin top and die breaking sealing, make molten plastic fill the die cavity shaped article, after the mould die sinking, when taper pin withdraws from cast gate backward, also product is upwards ejected, product is separated with cast gate, and the plastic structure that advances of this mould has not only solved the difficult problem of being broken by the top of cast gate, but also has the effect that ejects product.

[description of drawings]

What Fig. 1 illustrated the utility model mould advances the schematic diagram of plastic structure in mould matched moulds state.

Fig. 2 illustrates the schematic diagram that enters plastic structure one side of the utility model mould.

Fig. 3 illustrates the schematic diagram that enters the plastic structure another side of the utility model mould.

What Fig. 4 illustrated the utility model mould advances the schematic diagram of plastic structure in the mould die opening state.

[specific embodiment]

See also Fig. 1, Fig. 2 and shown in Figure 3, what it had illustrated the utility model mould respectively advances plastic structure in the schematic diagram of mould matched moulds state, the schematic diagram that enters plastic structure one side of the utility model mould and the schematic diagram that enters the plastic structure another side of the utility model mould.

Mould of the present utility model advance plastic structure, it is applied in the plastic mould, described plastic mould has die 100 and die cavity (figure does not show), in present embodiment, the plastic structure that advances 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 the described die 100 and passes through for molten plastic;

Cast gate 500, it is located on the described die 100 and is connected between described runner 400 and the 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 produce acceleration when advancing die cavity, help being full of rapidly die cavity, molten plastic elder generation condensation after the moulding in the cast gate 500 with near closed hollow ring, prevents that molten plastic from flowing backwards, it is too fast to avoid cavity pressure to descend, so that produce shrinkage cavity or depression on product 300.

Wherein, the descending transition gradually of the sectional area of described cast gate 500 is so that molten plastic is full of mold cavity forming product 300 rapidly.

Wherein, described cast gate 500 is extended at described taper pin top 210, and with convenient described taper pin 200 and die 100 breaking moulding, in present embodiment, the width of described cast gate 500 is extended greater than 0.5mm in taper pin top 210.

Wherein, with described mould die sinking direction is 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 then〉S2+S3, so that taper pin 200 withdraws from cast gate 500 fully and ejects product 300.

Please consult Fig. 1, Fig. 2 and shown in Figure 3 jointly, behind the mould matched moulds, taper pin top 210 and die 100 breaking sealings, molten plastic flows into from runner 400 in the cast gate 500, and cast gate 500 makes molten plastic fill die cavity shaped article 300 rapidly.

See also shown in Figure 4ly, after the mould die sinking, under the effect that ejects of the ejecting mechanism of mould, taper pin 200 moves obliquely, when promptly taper pin 200 withdraws from cast gate 500 backward, also product 300 is upwards ejected, and product 300 is separated at an easy rate with cast gate 500.

The utility model mould advance plastic structure, when in the moulding material, adding the product 300 of glass fibre, what not only solved product 300 advances the glue problem, make cast gate 500 disconnected by the top at an easy rate, but also has the effect that ejects product 300, simple in structure, and convenient adjusting of cast gate 500 sizes, be beneficial to the moulding of product 300.

Claims

A mould advance plastic structure, be applied in the plastic mould, described plastic mould has die and die cavity, it is characterized in that, the plastic structure that advances 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 the described die and passes through for molten plastic;

Cast gate, it is located on the described die and is connected between described runner and the 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 advance plastic structure, it is characterized in that the descending transition gradually of the sectional area of described cast gate is so that molten plastic is full of the mold cavity forming product rapidly.
Mould according to claim 1 advance plastic structure, it is characterized in that described cast gate is extended at described taper pin top, with convenient described taper pin and die breaking moulding.
4. mould according to claim 3 advances plastic structure, it is characterized in that, with mould die sinking direction is vertical direction, described taper pin is S1 in the stroke that withdraws from of horizontal direction, the width that described cast gate is extended at the taper pin top is S2, the width of described cast gate is S3, then S1〉S2+S3, so that taper pin withdraws from product and cast gate fully.