CN217098678U

CN217098678U - Injection mold without injection molding mark

Info

Publication number: CN217098678U
Application number: CN202220866491.8U
Authority: CN
Inventors: 金文杰
Original assignee: Ningbo Wanjin Electric Appliance Co ltd
Current assignee: Ningbo Wanjin Electric Appliance Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-02
Anticipated expiration: 2032-04-14

Abstract

The utility model provides a no injection mold of trace of moulding plastics, including the mould body, the upper end from the top down of mould body has set gradually apron, hot runner plate, front mould, and the centre of apron upper end is provided with the runner cover that passes hot runner plate, front mould, is equipped with feedstock channel in the runner cover, is equipped with the pneumatic needle valve that is used for switching the discharge gate of feedstock channel lower extreme in the runner cover. The utility model has the advantages that: the traceless injection molding can be realized, so that the product has no dotted trace and the subsequent manual removal process is not needed.

Description

Injection mold without injection molding mark

Technical Field

The utility model relates to a mould, in particular to injection mold of no trace of moulding plastics.

Background

The injection mold is a tool for producing plastic products, and the injection molding is a processing method used for batch production of parts with complex shapes, and specifically, the injection mold injects heated and melted plastic into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification.

In the process of producing a product by using an injection mold, a front mold is separated from a rear mold, a punctiform residue is generally left at an injection opening, the appearance of the product is influenced, the use of the product is also influenced, the product needs to be manually removed at the later stage, and even if the defect is left after manual removal.

SUMMERY OF THE UTILITY MODEL

【1】 Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a no injection mold of trace of moulding plastics can realize no trace and mould plastics, makes the product not have the punctiform vestige, need not subsequent artifical process of getting rid of.

【2】 Technical scheme for solving problems

The utility model provides a no injection mold of trace of moulding plastics, which comprises a die body, the upper end from the top down of mould body has set gradually apron, hot runner plate, front mould, the centre of apron upper end is provided with passes the hot runner plate the sprue bush of front mould, be equipped with feedstock channel in the sprue bush, be equipped with in the sprue bush and be used for the switch the pneumatic needle valve of the discharge gate of feedstock channel lower extreme, the needle of pneumatic needle valve will when the discharge gate is closed, the lower terminal surface of needle with the lower terminal surface of sprue bush flushes.

It can be understood that when the injection molding raw material is injected into the feeding channel, the valve needle of the pneumatic needle valve is lifted, the valve needle does not block the discharge hole any more, and the injection molding raw material enters the mold cavity; when injection molding raw materials are injected, a valve needle of the pneumatic needle valve descends and blocks a discharge hole, and at the moment, the lower end face of the valve needle is flush with the lower end face of the sprue bush, so that no point-like trace which is generally left by injection molding exists in an injection molded product.

The utility model discloses further preferred scheme: the upper end of the hot runner plate is provided with a groove, a wire harness and a heating ring surrounding the sprue bush are arranged in the groove, the front end of the cover plate is provided with a junction box, and the wire harness is connected with the heating ring and the junction box.

It will be appreciated that the junction box is connected to a power source and the junction box heats the heating coil via the wire harness to heat the injected molding material.

Further, the groove comprises a runner groove which surrounds the sprue bush and extends downwards, the heating ring is arranged between the sprue bush and the runner groove, and a wire groove used for placing the wire harness is formed in the front end of the runner groove along the width direction of the hot runner plate.

It can be understood that the front end of the downward extending part of the runner groove is provided with a forward concave containing groove, more heating rings can be placed on the downward extending runner groove from top to bottom, the heating range and the heating effect are improved, and the wire harness placed in the wire groove is connected with the heating rings and the junction box along the wire groove.

Furthermore, the upper end of the cover plate is provided with an opening communicated with the groove, the top end of the opening is fixed with a sealing cover through a screw, and the upper end face of the sealing cover is flush with the upper end face of the cover plate.

It will be appreciated that the openings communicate with the recesses and may also be used to place wiring harnesses to give more room.

Furthermore, the air pipe joint of the pneumatic needle valve penetrates through the sprue bush and extends to the opening, and an outlet pipe orifice is arranged on the lower side of the front end of the groove.

It can be understood that the air pipe connected with the air pipe joint can go out from the outlet pipe after passing through the opening and the wire groove.

Further, the part of the sprue bush, which is positioned in the runner groove, is provided with annular grooves at equal intervals from top to bottom.

It can be understood that the heating ring can be placed in the ring groove, so that the heating ring is closer to the ring groove, and the heating effect is improved.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic view of a part of the structure of the present invention;

FIG. 4 is a partial perspective view of the present invention;

fig. 5 is an enlarged view of a portion a of fig. 4.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the utility model provides a no injection mold of trace of moulding plastics, it includes mould body 1, mould body 1's upper end from the top down has set gradually apron 2, hot runner plate 3, front mould 4, the centre of apron 2 upper end is provided with passes hot runner plate 3, the runner cover 7 of front mould 4, be equipped with feedstock channel in the runner cover 7, be equipped with the pneumatic needle valve 8 that is used for the discharge gate of switch feedstock channel lower extreme in the runner cover 7, when the needle of pneumatic needle valve 8 was closed the discharge gate, the lower terminal surface of needle flushed with the lower terminal surface of runner cover 7.

When injection molding raw materials are injected into the feeding channel, the valve needle of the pneumatic needle valve is lifted, the valve needle does not block the discharge hole any more, and the injection molding raw materials enter the mold cavity; when injection molding raw materials are injected, a valve needle of the pneumatic needle valve descends and blocks a discharge hole, and at the moment, the lower end face of the valve needle is flush with the lower end face of the sprue bush, so that no point-like trace which is generally left by injection molding exists in an injection molded product.

The utility model discloses a further preferred scheme: the upper end of the hot runner plate 3 is provided with a groove 6, a wire harness and a heating ring surrounding the sprue bush 7 are arranged in the groove 6, the front end of the cover plate 2 is provided with a junction box 5, and the wire harness is connected with the heating ring and the junction box 5.

The junction box is connected with a power supply, and the junction box heats the heating ring through a wire harness, so that the injected injection molding raw material is heated.

The groove 6 comprises a runner groove 6.1 which surrounds the sprue bush 7 and extends downwards, the heating ring is arranged between the sprue bush 7 and the runner groove 6.1, and a wire slot 6.2 used for placing a wire harness is arranged at the front end of the runner groove 6.1 along the width direction of the hot runner plate 3.

The front end of the downward extending part of the runner groove is provided with a containing groove which is concave forwards, more heating rings can be placed on the downward extending runner groove from top to bottom, the heating range and the heating effect are improved, and a wire harness placed in the wire groove is connected with the heating rings and the junction box along the groove.

The upper end of the cover plate 2 is provided with a hole communicated with the groove 6, the top end of the hole is fixed with a sealing cover 9 through a screw, and the upper end face of the sealing cover 9 is flush with the upper end face of the cover plate 2.

The opening is communicated with the groove and can be used for placing the wiring harness, so that a larger accommodating space is provided.

The air pipe joint of the pneumatic needle valve 8 penetrates through the sprue bush 7 and extends to the opening, and the lower side of the front end of the groove 6 is provided with an outlet pipe orifice 6.3.

The air pipe connected with the air pipe joint can be discharged from the pipe outlet after passing through the hole and the wire groove.

The part of the sprue bush 7 located in the runner channel 6.1 is provided with ring grooves 7.1 at equal intervals from top to bottom. The heating ring can be placed in the ring groove, so that the heating ring is closer to the ring groove, and the heating effect is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a no injection mold of mark of moulding plastics which characterized in that: including mould body (1), the upper end from the top down of mould body (1) has set gradually apron (2), hot runner plate (3), front mould (4), the centre of apron (2) upper end is provided with and passes hot runner plate (3) sprue bush (7) of front mould (4), be equipped with feedstock channel in sprue bush (7), be equipped with in sprue bush (7) and be used for the switch pneumatic needle valve (8) of the discharge gate of feedstock channel lower extreme, the needle of pneumatic needle valve (8) will when the discharge gate is closed, the lower terminal surface of needle with the lower terminal surface of sprue bush (7) flushes.

2. The injection mold without injection mark of claim 1, wherein: the upper end of the hot runner plate (3) is provided with a groove (6), a wire harness and a heating ring surrounding the sprue bush (7) are arranged in the groove (6), the front end of the cover plate (2) is provided with a junction box (5), and the wire harness is connected with the heating ring and the junction box (5).

3. The injection mold without injection mark of claim 2, wherein: recess (6) are including encircleing runner groove (6.1) of sprue bush (7) and downwardly extending, the heating collar set up in sprue bush (7) with between runner groove (6.1), the front end of runner groove (6.1) is followed the width direction of hot runner plate (3) is provided with and is used for placing wire casing (6.2) of pencil.

4. The injection mold without injection mark of claim 2, wherein: the upper end of the cover plate (2) is provided with an opening communicated with the groove (6), the top end of the opening is fixed with a sealing cover (9) through a screw, and the upper end face of the sealing cover (9) is flush with the upper end face of the cover plate (2).

5. The injection mold without injection mark of claim 4, wherein: the air pipe joint of the pneumatic needle valve (8) penetrates through the sprue bush (7) and extends to the opening, and a pipe outlet (6.3) is arranged on the lower side of the front end of the groove (6).

6. The injection mold without injection mark of claim 3, wherein: the part of the sprue bush (7) positioned in the runner groove (6.1) is provided with ring grooves (7.1) at equal intervals from top to bottom.