CN201291572Y

CN201291572Y - Secondary ejection mechanism of plastic helical gear injection mold

Info

Publication number: CN201291572Y
Application number: CNU2008203030140U
Authority: CN
Inventors: 冉启刚; 翁经鸿
Original assignee: Zunyi Qunjian Plastics Products Co ltd
Current assignee: Zunyi Qunjian Plastics Products Co ltd
Priority date: 2008-11-28
Filing date: 2008-11-28
Publication date: 2009-08-19
Anticipated expiration: 2018-11-28

Abstract

The utility model discloses a plastic helical gear injection mold secondary ejection mechanism, which comprises an upper push plate, a lower push plate and a movable template, wherein the movable template is provided with a through hole capable of passing through an injection molding machine ejector rod, the inner side of the lower push plate is fixed with a swing rod fixing block, a swing rod with a positioning pin is arranged in the swing rod fixing block, the lower end of the swing rod is provided with a limit pin, and the lower end of the swing rod and the limit pin are positioned in a cavity of the movable template; a lower ejector rod is fixed on the lower push plate, the upper end of the lower ejector rod is fixedly connected with a cavity fixing plate, and a cavity is fixed at the upper end of the cavity fixing plate; an upper ejector rod is fixed on the upper push plate, and the upper end of the upper ejector rod penetrates through the mold core fixing plate and the mold core. The utility model discloses a secondary ejection mechanism all cores that mould the piece earlier all deviate from, mould in the profile of tooth die cavity of a mould one side, then with the direct ejecting piece of moulding of ejector pin. Therefore, the quality of the plastic part can be ensured, and the structure of the mold can be simplified.

Description

Plastic beveled wheel injection mold secondary ejecting mechanism

Technical field

The utility model relates to a kind of mould ejecting mechanism, especially a kind of plastic beveled wheel injection mold secondary ejecting mechanism.

Background technology

At present, the stripping means that the plastic beveled wheel injection mold is commonly used generally has two kinds: a kind of is directly to eject, do not adopt any special ejecting device, it is little that this release mode only is suitable for the helical gear inclination angle, the situation that transverse tooth thickness is thin, directly pushing method can damage plastic helical teeth part quality unavoidably in push, influences the use of goods in the later stage but theoretically; Another kind of mode is a kind of rotating mechanism of design, mold cavity is fixed on the two-direction thrust bearing, during the demoulding because the package power effect, plastic wraps in tightly and does rectilinear motion on the core, and die cavity rotates under goods profile of tooth ramp effect power, thereby make goods deviate from die cavity smoothly, utilize other release mode that product is released from core again; Its advantage of this stripping means is to guarantee the quality of product, but the mould structure complexity, mold cooling system the comparison difficulty is set, increased the difficulty of mould design.

The utility model content:

The purpose of this utility model is: a kind of plastic beveled wheel injection mold secondary ejecting mechanism is provided, and it is simple in structure, cost is lower, and can guarantee the injection mold secondary liftout attachment of plastic beveled wheel product quality, to overcome the deficiencies in the prior art.

The utility model is achieved in that plastic beveled wheel injection mold secondary ejecting mechanism, comprise push pedal, push pedal down, moving platen, on moving platen, be provided with a through hole that can pass the injection machine push rod, be provided with the fork of band alignment pin in the inboard of push pedal down, lower end at fork is provided with spacer pin, and the lower end of fork and spacer pin are in the cavity of moving platen; Also be fixed with a lower push rod in the push pedal down, the upper end of lower push rod is fixing to be connected with impression bolster, and the upper end of impression bolster is fixed with die cavity; Be fixed with upper ejector pin in last push pedal, core fixing plate and core are passed in the upper end of upper ejector pin.

Inboard in push pedal down is provided with the fork fixed block, and the alignment pin of fork is fixed on the fork fixed block.

Owing to adopted technique scheme, compared with prior art, the utility model has adopted secondary ejecting mechanism, earlier all cores of plastic is all deviate from, and plastic is stayed in the profile of tooth die cavity of dynamic model one side, directly ejects plastic with push rod then.Because the back size decreases is shunk in the plastic cooling, and certain clearance is arranged between die cavity, thereby deviates from die cavity smoothly, can guarantee that like this quality of plastic can be simplified mould structure again.Of the present utility model simple in structure, with low cost, result of use is good.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is installed the partial structurtes schematic diagram of fork for the utility model;

Accompanying drawing 3 is a use schematic diagram of the present utility model.

The specific embodiment

Embodiment of the present utility model: the structure of plastic beveled wheel injection mold secondary ejecting mechanism as shown in Figure 1, produce push pedal 1, push pedal 3 down, moving platen 4, on moving platen 4, be provided with a through hole, injection machine push rod 13 passes this through hole and contacts with following push pedal 3, inboard in push pedal 3 is down fixed fork fixed block 7 by screw, alignment pin 6 with fork 2 is installed in the fork fixed block 7 again, install spacer pin 5 in the lower end of fork 2, and the lower end and the spacer pin 5 of fork 2 all is installed in the cavity of moving platen 4; Down with bolt a lower push rod 10 is being installed in the push pedal 3 then, the upper end of lower push rod 10 is fixing to be connected with impression bolster 8, the fixing die cavity 9 in the upper end of impression bolster 8; Install push rod 11 in last push pedal 1, core fixing plate 12 and core 14 are passed in the upper end of upper ejector pin 11, can eject plastic.

In use, after injection mo(u)lding is finished, injection machine push rod 13 pushes down push pedal 3, make down push pedal 3 drive fork 2, lower push rod 10 and upper ejector pin 11 move together, core 14 begins to deviate from, after moving certain distance, at this moment core 14 is all deviate from, spacer pin 5 on the fork 2 run into the upper plate of moving platen 4 and be stuck carried out spacing, injection machine push rod 13 continues to push down push pedal 3 and moves, because spacer pin 5 is subjected to the restriction of moving platen 4, the direction that fork 2 begins to do shown in arrow among Fig. 3 is moved, fork 2 drives upward push pedal 1 and upper ejector pin 11 moves, and behind the thickness of distance greater than die cavity 9 that last push pedal 1 is moved, plastic breaks away from die cavity 9 fully.Matched moulds carries out the injection moulding of following one-period then.

Claims

1. plastic beveled wheel injection mold secondary ejecting mechanism, comprise push pedal (1), push pedal (3) down, moving platen (4), on moving platen (4), be provided with a through hole that can pass injection machine push rod (13), it is characterized in that: the fork (2) that is provided with band alignment pin (6) in the inboard of push pedal (3) down, be provided with spacer pin (5) in the lower end of fork (2), the lower end of fork (2) and spacer pin (5) are in the cavity of moving platen (4); Also be fixed with a lower push rod (10) in the push pedal (3) down, the upper end of lower push rod (10) is fixing to be connected with impression bolster (8), and the upper end of impression bolster (8) is fixed with die cavity (9); Be fixed with upper ejector pin (11) in last push pedal (1), core fixing plate (12) and core (14) are passed in the upper end of upper ejector pin (11).

2. plastic beveled wheel injection mold secondary ejecting mechanism according to claim 1 is characterized in that: the inboard in push pedal (3) down is provided with fork fixed block (7), and the alignment pin (6) of fork (2) is fixed on the fork fixed block (7).