CN101347978A

CN101347978A - Ejecting mechanism

Info

Publication number: CN101347978A
Application number: CNA2007100249828A
Authority: CN
Inventors: 马升仓
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2007-07-16
Filing date: 2007-07-16
Publication date: 2009-01-21

Abstract

The invention discloses a knockout mechanism that is used for knocking a product out of a core and a cavity, wherein, the knockout mechanism comprises a set of top plates that are arranged in a top plate groove formed by depression of the cavity, the top plates comprise at least one limited stepped hole and a return pin. The limited stepped hole is sleeved and provided with a screw, and a knockout spring that is sleeved on the screw is compressed and held in a spring hole formed by extension and depression of the top plate groove; the return pin is movably held in a return pin hole of the core, one end of the return pin supports the top plates, the other end interferes with the return spring, and the return spring is held in a spring groove formed by depression of the bottom of the return pin hole. The mechanism uses simple springs to replace a complicated ejector pin and ejector block mechanism, thus simplifying the mould structure and reducing the mould cost.

Description

Ejecting mechanism

[technical field]

The relevant a kind of ejecting mechanism of the present invention, especially a kind of mechanism that ejects the male and female die of thermoplastic product disengaging mould.

[background technology]

In the process of mould design; run into some special plastic molded products (as: Transparent Parts) through regular meeting, high especially to appearance requirement, necessary no thimble vestige; the back cutter trade can not appear; conventional design is to adopt the jacking block top board to eject, and so just make the very complicated of mould structure change: it comprises upper and lower liftout plate, foot pad at least; bottom plate; therefore increase Mould design time and machining period, influence die quality and die trial time, and then die cost is improved.

In view of above-mentioned, be necessary to develop a kind of ejecting mechanism simple in structure, eject plastic cement products and break away from the male and female die.

[summary of the invention]

Therefore, purpose of the present invention promptly provides a kind of ejecting mechanism, ejects plastic cement products and breaks away from the male and female die, in order to solve the baroque problem that mould uses the jacking block top board to be brought in the prior art.

For reaching above-mentioned purpose, the invention provides a kind of ejecting mechanism, eject product and break away from the male and female die, wherein, this ejecting mechanism comprises that one is mounted on the interior top board of top board groove that this mother module core is recessed to form, this top board comprises at least one limited step hole, and in order to wearing screw, and sheathed ejector spring compression is located in by this top board groove and extends in the spring eye of depression on this screw; And a return pin, activity is contained in the return pin-and-hole of this male model benevolence, and the one end peaks at above-mentioned top board, other end negotiation return spring, and this return spring is contained in the spring groove that this return pin-and-hole bottom notch becomes.

Compared to prior art, the simple spring of ejecting mechanism utilization of the present invention has replaced complicated thimble jacking block mechanism, promptly replaced the ejecting force of moulding board with spring force, saved the lower roof plate ejecting mechanism (comprising upper and lower liftout plate, foot pad, bottom plate) of going up of the prior art, simplify mould structure, reduce Mould design time and machining period, shorten opening period, reduce die cost.

For making purpose of the present invention, structural feature and function thereof there are further understanding, cooperate diagram to be described in detail as follows now:

[description of drawings]

Fig. 1 is that ejecting mechanism of the present invention is in the matched moulds state diagram.

Fig. 2 is ejecting mechanism of the present invention and die, schematic diagram when template is separated.

Fig. 3 is that the present invention is in die sinking tool state diagram fully.

Fig. 4 is that the present invention is in the state diagram of complete die sinking tool.

[specific embodiment]

Consult Fig. 1 and Fig. 2 in the lump, this ejecting mechanism is mounted between the male and

female die

7,2, wherein, this mother module core 2 comprises at least one guide pillar 23, and in order to the moving direction of this ejecting mechanism that leads, and this mother module core 2 caves inward into a top board groove 21 by die joint, the top board 3 that holds this ejecting mechanism, these top board groove 21 bottoms are extended and caved in at least one spring eye 22, and caster 1 and these spring eye 22 coaxial hearts extension depression one screws 11, and are sealed with the screw 4 of sheathed ejector spring 40; Again, this male model benevolence 7 caves inward into a return pin-and-hole 71 with this screw 11 and spring eye 22 coaxial hearts by die joint, return pin 5 is held in activity, and this return pin-and-hole 71 extends depression one spring groove 81 away from an end of die joint, in order to take in the return spring 50 that ejects return pin 5, in the present embodiment, this spring groove 81 extends to male model plate 8 by male model benevolence 7.

This ejecting mechanism comprises that one ejects the top board 3 of product 6, place in the above-mentioned top board groove 21, it comprises at least one limited step hole 32, wear a screw 4 and sealed with above-mentioned screw 11, an and sheathed ejector spring 40 on this screw 4, these ejector spring 40 compressions are located in the spring eye 22 of this mother module core 2, are used to limit the ejection stroke of top board 3; Again, the guide pillar 23 of the also corresponding above-mentioned mother module core 2 of this top board 3 is offered at least one dowel hole 31, wears for this guide pillar 23, in order to the moving direction of this top board 3 of guide-localization when matched moulds or the die sinking.Moreover, this ejecting mechanism also comprises a return pin 5, this return pin 5 is movably placed in the return pin-and-hole 71 of above-mentioned male model benevolence 7, and these return pin 5 one ends peak at the top board 3 of limited step hole 32 peripheries, the return spring 50 in the above-mentioned spring groove 81 is located in other end negotiation, be used to delay the ejection cycle of top board 3, prevent that product 6 from gluing male model benevolence 7 and being difficult for taking-up when die sinking, and the elastic force of this return spring 50 be greater than the elastic force of above-mentioned ejector spring 40.

During die sinking, consult Fig. 3, at first diastole of return spring 50, return pin 5 pass return pin-and-hole 71 and continue to head on screw 4 and the top board 3 of this screw 4 peripheries, and product 6 breaks away from male model benevolence 7 simultaneously, when treating complete die sinking (with reference to Fig. 4), return pin 5 breaks away from top board 3, ejector spring 40 diastoles, and top board 3 moves down along the direction of leading 23, this moment, product 6 disengaging mother module cores 2 negotiated until screw 4 and limited step hole 32.

During matched moulds, return pin 5 heads on top board 3, ejector spring 40 compressions, be contained in fully in the top board groove 21 until this top board 3, this moment, screw 4 was concordant with this top board 3, continued matched moulds, return pin 5 pressurizeds are return return pin-and-hole 71 gradually, and return spring 50 compressions are concordant with male model benevolence 7 until return pin 5.

In sum, the simple spring of ejecting mechanism utilization of the present invention has replaced complicated thimble jacking block mechanism, has saved the lower roof plate ejecting mechanism of going up of the prior art, simplify mould structure, reduce Mould design time and machining period, shorten opening period, reduce die cost.

Claims

1, a kind of ejecting mechanism, the pushing tow product breaks away from the male and female die, wherein, this mother module core caves in into a top board groove, this top board groove extends and caves in at least one spring eye, and the screw coaxial with this spring eye that cave in extended in this spring eye bottom, and this male model benevolence caves in into a return pin-and-hole with the coaxial heart of this screw, and this return pin-and-hole bottom notch one spring groove, this is characterized in that: comprise

One top board is mounted in the above-mentioned top board groove, and it comprises at least one limited step hole, wears the screw of a sheathed ejector spring and sealed with above-mentioned screw, and this ejector spring compression is located in the above-mentioned spring eye;

One return pin, activity are contained in the above-mentioned return pin-and-hole, and an end peaks at above-mentioned top board, and other end negotiation is contained in the return spring in the above-mentioned spring groove.

2, ejecting mechanism as claimed in claim 1 is characterized in that: this mother module core also comprises at least one guide pillar, and this top board be to offering at least one dowel hole by guide pillar, and activity is installed with these guide pillars.

3, ejecting mechanism as claimed in claim 1 is characterized in that: this screw is recessed to form along this spring eye extension by caster.

4, ejecting mechanism as claimed in claim 1 is characterized in that: this spring groove extends to the male model plate by male model benevolence.