CN201881517U - injection mold - Google Patents

Abstract

The utility model discloses an injection mold, it includes a cover half, a movable mould, a fixed plate, one goes up the liftout plate, an at least product thimble and at least one delay thimble. The movable die and the fixed die are arranged oppositely, and a cavity and a runner are enclosed when the dies are assembled; a clamping space is arranged between the upper ejection plate and the lower ejection plate; the middle part of the delay thimble is provided with a clamping part which protrudes outwards, and the clamping part can be movably clamped in the clamping space. The utility model discloses injection mold can be corresponding in the runner in the shaping product formation runner waste material, and when the die sinking, the product thimble can support the product earlier, makes product and runner waste material separation, then postpones the thimble ejecting with the runner waste material again to improve production efficiency.

Description

injection mold

technical field

The utility model relates to a mold, in particular to an injection mold.

Background technique

Please refer to Fig. 8, which is a schematic diagram of a demoulding state of a conventional mold 10'. This existing mold 10' includes a certain mold (not shown), a movable mold 20', an upper ejector plate 30', a product ejector pin 40' fixed on the upper ejector plate 30', and a lower ejector plate 50' And a lower ejector pin 60' fixed on the lower ejector plate 50'. The fixed mold and the movable mold 20' are arranged correspondingly, and the molding cavity is surrounded when the mold is closed, and the raw material is injected into the cavity from the runner and cooled to make the product 81 and the runner waste 91; when the mold is opened, the product thimble 40' is pushed out Ejecting the bottom of the product 81 , the lower ejector pin 60 ′ corresponds to ejecting the bottom of the runner waste 91 ; the product ejector 40 ′ and the lower ejector 60 ′ eject the product 81 and the runner waste 91 together.

However, the product 81 obtained by the above-mentioned existing mold 10' tends to stick together with the runner waste 91, and must be manually separated and reprocessed to meet the production requirements, thereby prolonging the production time and not conducive to improving production efficiency.

Utility model content

The purpose of the utility model is to provide an injection mold which can automatically separate products and flow channel waste to improve production efficiency.

In order to achieve the above object, the injection mold of the utility model includes a fixed mold, a movable mold, a fixed plate, an upper ejector plate, a lower ejector plate, at least one product thimble and at least one delayed thimble. The movable mold is set opposite to the fixed mold. When the mold is closed, the movable mold and the fixed mold surround the molding cavity and flow channel. The movable mold is provided with a product ejector hole communicating with the cavity and a delayed ejector hole communicating with the flow channel. And the undercut groove communicated with the flow channel; the fixed plate is arranged under the movable mold and forms a movable space with the movable mold, and a top block is arranged on the fixed plate; the upper ejector plate can be movably installed on the In the activity space; the lower ejector plate is fixed below the upper ejector plate, and the lower ejector plate and the upper ejector plate form a clamping space, and the lower ejector plate is provided with a through hole communicating with the clamping space; the product One end of the thimble is fixed by the upper ejector plate and the lower ejector plate, and the other end can extend into the ejector pin hole of the product; There is a clamping part that protrudes outward, and the clamping part is movably clamped in the clamping space. The upper end of the delay ejector pin can be inserted into the delay ejector pin hole, and the other end can eject the plate from the bottom when the mold is closed. The through hole protrudes and abuts against the top block.

As mentioned above, when the injection mold of the utility model is molding the product, it will correspondingly form runner waste in the runner and form an undercut in the undercut groove. When the mold is opened, the product ejector will first touch the product, so that the product and The undercut is fixed on the movable mold to separate the runner waste, and then the ejector pin is delayed to eject the runner waste and the undercut, thereby improving production efficiency.

As a further improvement, the clamping space can be provided between the upper and lower ejection plates.

The clamping space can also be set on the upper ejection plate.

The clamping space can also be set on the lower ejection plate.

Description of drawings

Fig. 1 is a cross-sectional view when the utility model injection mold is clamped;

Fig. 2 is a schematic diagram of a movable mold and a fixed mold of the injection mold shown in Fig. 1;

Fig. 3 is a schematic diagram of a state of the injection mold opening process of the utility model;

Fig. 4 is the schematic diagram of the mold opening state of the injection mold of the present invention;

Fig. 5 is a schematic diagram of the clamping space of the injection mold of the present invention;

Fig. 6 is a schematic diagram of the second embodiment of the clamping space of the injection mold of the present invention;

Fig. 7 is a schematic diagram of a third embodiment of the clamping space of the injection mold of the present invention;

Fig. 8 is a schematic diagram of a state when the existing mold is opened.

The reference signs in the figure are explained as follows:

Injection mold 100 fixed mold 10

Moving mold 20 Product thimble hole 21

Delay Ejector Hole 22 Undercut Slot 23

Fixed plate 30 Top block 31

Activity space 32 Upper ejection board 40

Bottom ejector plate 50 Through hole 51

Holder Space 52 Product Ejector 60

Delay thimble 70 Holder 71

Cavity 80 Product 81

Runner 90 Runner Waste 91

Back button 92

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

1, the utility model injection mold 100 includes a fixed mold 10, a movable mold 20, a fixed plate 30, an upper ejector plate 40, a lower ejector plate 50, at least one product thimble 60 and at least one delay thimble 70.

Please continue to refer to Fig. 2, the movable mold 20 is arranged opposite to the fixed mold 10, when the mold is closed, the movable mold 20 and the fixed mold 10 surround the molding cavity 80 and the runner 90, and the movable mold 20 is provided with a hole communicating with the cavity 80 The product thimble hole 21 , the delay thimble hole 22 communicated with the flow channel 90 and the undercut groove 23 communicated with the flow channel 90 .

The fixed plate 30 is disposed under the movable mold 20 and forms a movable space 32 with the movable mold 20 , and a top block 31 is disposed on the fixed plate.

The upper ejector plate 40 is movably installed in the movable space 32; the lower ejector plate 50 is fixed below the upper ejector plate 40, and the lower ejector plate 50 and the upper ejector plate 40 enclose a clamping space 52 (as shown in FIG. 5 ), each of the upper and lower ejection plates 40 and 50 is provided with a through hole 51 communicating with the holding space 52 . In the present invention, the clamping space 52 can also be provided only on the upper ejector plate 40 (as shown in FIG. 6 ) or on the lower ejector plate 50 (as shown in FIG. 7 ).

One end of the product ejector pin 60 is fixed by the upper ejector plate 40 and the lower ejector plate 50, and the other end can be stretched into the product ejector pin hole 21.

The delay thimble 70 is movably installed on the lower ejector plate 50 and the upper ejector plate 40, and the middle part of the delay thimble 70 protrudes outward to form a clamping portion 71, which is movably clamped on the In the clamping space 52, the upper end of the delay ejector pin 70 can extend into the delay ejector pin hole 22, and the other end can extend from the through hole 51 of the lower ejector plate to abut against the ejector block 31 when the mold is closed.

Please continue to refer to Fig. 1, which is a cross-sectional view of the utility model injection mold 100 when closing the mold: raw materials are injected into the cavity 80 and the undercut groove 23 from the runner 90, and the product 81, the runner waste 91 and the undercut groove are obtained after cooling 92. One end of the product thimble 60 abuts against the bottom of the product 81, and the other end is fixed between the upper and lower ejector plates 40, 50;

Please refer to Fig. 1 and Fig. 3, when the injection mold 100 of the utility model is demolded, the upper and lower ejector plates 40, 50 move upwards, because the delay thimble 70 is not fixed and the product thimble 60 is fixed, so the delay thimble 70 is not fixed. The product thimble 60 will push out the product 81 upwards, so that the product 81 is separated from the runner waste 91 fixed on the movable mold 20 by the undercut 92 .

Please refer to Fig. 3 and Fig. 4, when the upper and lower ejector plates 40, 50 move upward to the position shown in Fig. 3, the lower ejector plate 50 pushes the clamping portion 71 so that the delayed ejector pin 70 is ejected upward together until The upper ejector plate 40 abuts against the male die 20 .

When the injection mold 100 of the utility model is closed, the upper ejector pin 40 moves downward together with the upper and lower ejector plates 40, 50; the delayed ejector pin 70 does not move downward at the beginning, and when the upper ejector plate 40 pushes against the holding part At 71 o'clock, the delay thimble 70 also moves down, until the lower end of the delay thimble 70 abuts against the top block 31 of the fixed plate 30 .

As mentioned above, the injection mold 100 of the present invention will form the runner waste 91 in the runner 90 and the undercut 92 in the undercut groove 23 when molding the product 81. When the mold is opened, the product thimble 60 will first Push against the product 81 to separate the product 81 from the runner waste 91 fixed on the movable mold 20 through the undercut 92, and then delay the ejector pin 70 to eject the runner waste 91 and the undercut 92, thereby improving production efficiency.

Claims (4)

1. an injection mold is used for automatic products of separated and runner waste material, comprises a cover half, a dynamic model, a fixed head, a upper ejector plate, liftout plate once, at least one product thimble and at least one delay thimble; The corresponding setting of this dynamic model with cover half, dynamic model and cover half surround die cavity and runner during matched moulds, offer the product centre hole that communicates with die cavity on this dynamic model; This fixed head be arranged at below the dynamic model and and dynamic model between form an activity space; Upper and lower liftout plate fixes, and is installed in movably in the activity space; Liftout plate was fixed under this product thimble one end was reached by upper ejector plate, and the other end can extend in the product centre hole; It is characterized in that: offer delay centre hole that communicates with runner and the back-off groove that communicates with runner on this dynamic model; This fixed head is provided with a jacking block; This time liftout plate and upper ejector plate are surrounded by and hold the space, and this upper and lower liftout plate offers respectively and holds the through hole that the space communicates; This delay thimble is installed in down on liftout plate and the upper ejector plate movably, its center has outwards convexed to form the holding section, the holding section is fastened in movably and holds in the space, and this delay thimble upper end can extend into and postpone in the centre hole, and the other end can be replaced with jacking block when matched moulds.

2. injection mold as claimed in claim 1 is characterized in that: the described space that holds can be located between the upper and lower liftout plate.

3. injection mold as claimed in claim 1 is characterized in that: the described space that holds can be located on the upper ejector plate.

4. injection mold as claimed in claim 1 is characterized in that: the described space that holds can be located at down on the liftout plate.

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