CN100542778C

CN100542778C - Push-out mechanism for plastic jetting mold

Info

Publication number: CN100542778C
Application number: CNB2005100342442A
Authority: CN
Inventors: 杜健生
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2005-04-15
Filing date: 2005-04-15
Publication date: 2009-09-23
Anticipated expiration: 2025-04-15
Also published as: CN1846967A

Abstract

The present invention discloses a kind of push-out mechanism for plastic jetting mold, and this ejecting mechanism comprises: first assembly, second assembly, taper pin, thimble, shutter, pull bar and push rod; First assembly and second assembly stack successively, taper pin one end is fixed in first assembly, the other end passes first assembly vertically and extends, thimble one end is fixed in second assembly, the other end also passes first assembly vertically and extends, what shutter was movable is installed in first assembly and second assembly, pull bar one end is fixed on the mould, the other end passes second assembly and this end is provided with the flange that is placed in slidably in first assembly, this flange is kept out this second assembly, limit the sliding distance of this second assembly, push rod one end can pass second assembly and replace first assembly.This ejecting mechanism has reduced the product whiting, and can easily complex-shaped product be ejected, and simple in structure, easy to operate.

Description

Push-out mechanism for plastic jetting mold

[technical field]

The invention relates to a kind of push-out mechanism for plastic jetting mold.

[background technology]

The plastic injecting mold of general single cylinder injection, ejecting of its plastic parts is to rely on length long and the thinner thimble of diameter once ejects, every pair of plastic injecting mold has a plurality of thimbles.Fig. 1 is a kind of profile that is in the plastic injecting mold of die opening state, this plastic injecting mold (not label) comprises a die 50, one punch 51 and an ejecting mechanism 52, this die 50 is fixed in upper bearing plate 53, this punch 51 is connected with lower support plate 55 by connector 54, form a cavity therebetween and accommodate ejecting mechanism 52, ejecting mechanism 52 comprises first push pedal 530, second push pedal 531, thimble 532, return guide pillar 533, spring 534 and push rod 535, thimble 532 is fixed in second push pedal 531 and can passes first push pedal 530 and punch 51, return guide pillar 533 is fixed in first push pedal 530, spring 534 is placed on the return guide pillar 533, one end is replaced punch 51, the other end supports first push pedal 530, and push rod 535 slidably passes lower support plate 55 and replaces second push pedal 531.When push rod 535 is subjected to drive when replacing ejecting mechanism 52 and advancing, thimble 532 thereupon before so that with plastic parts top die face from punch 51, so that be removed, this moment, spring 534 was in contraction state, when push rod 535 retreats, the elastic force of spring 534 orders about first push pedal 530 and also retreats and drive thimble 532 and retreat, and is back to original position until whole ejecting mechanism 52, enters the next round circulation.

This push-out mechanism for plastic jetting mold is simple in structure, the right thimbles that all use, and it ejects, and strength is excessive to be caused stress to concentrate easily and the phenomenon that product (plastic parts) bleaches occurs, and is difficult for being ejected when the shape of product complexity.

[summary of the invention]

In view of above content, be necessary to provide a kind of push-out mechanism for plastic jetting mold that the product whiting is easy to eject complex-shaped product again that reduces.

A kind of push-out mechanism for plastic jetting mold, this ejecting mechanism comprises: first assembly, second assembly, taper pin, thimble, shutter, pull bar and push rod, first assembly and second assembly stack successively, taper pin one end is fixed in first assembly, the other end passes first assembly vertically and extends, thimble one end is fixed in second assembly, the other end also passes first assembly vertically and extends, what shutter was movable is installed in first assembly and second assembly, pull bar one end is fixed on the mould, the other end passes second assembly and this end is provided with the flange that is placed in slidably in first assembly, this flange is kept out this second assembly, limit the sliding distance of this second assembly, push rod one end can pass second assembly and replace first assembly.

Compared with prior art, described push-out mechanism for plastic jetting mold is by the taper pin that is fixed in first assembly and be fixed in the thimble of second assembly, eject by two-part product is ejected, because of the taper pin top identical with the shape of product contact-making surface, reduced the product whiting, and can easily complex-shaped product be ejected, this ejecting mechanism is simple in structure, and is easy to operate.

[description of drawings]

Below, will enumerate preferred embodiment this push-out mechanism for plastic jetting mold will be described.

Fig. 1 is the cutaway view of a kind of existing push-out mechanism for plastic jetting mold when being in die opening state;

Fig. 2 is the cutaway view of the push-out mechanism for plastic jetting mold of preferred embodiment of the present invention when being in the mold closing state;

Fig. 3 is the cutaway view of the push-out mechanism for plastic jetting mold of preferred embodiment of the present invention when being in die opening state.

[specific embodiment]

The present invention's preferred embodiment discloses a kind of push-out mechanism for plastic jetting mold.

See also Fig. 2 and Fig. 3, the ejecting mechanism of the preferred embodiment of this creation is used for plastic injecting mold, this plastic injecting mold comprises the first housing 1, the second housing 2 and ejecting mechanism 3, the first housing 1 and the second housing 2 coaxial settings, ejecting mechanism 3 movable being assemblied in the second housing 2.

The first housing 1 comprises a die 10 and a upper bearing plate 12, these die 10 1 ends are fixed in upper bearing plate 12, inside recessed formation one die benevolence face 102 among the other end, a feeding mouth 124 and a feed channel 122 are established in upper bearing plate 12 middle parts, and this feed channel 122 passes die 10 and extends to die benevolence face 102.

The second housing 2 comprises a punch 20, these punch 20 1 ends are fixed in a lower support plate 24 by a connector 22, this three surrounds an accommodation space 26 in order to accommodate ejecting mechanism 3, the outwards outstanding punch benevolence face 202 that forms among punch 20 other ends, die benevolence face 102 shapes of this punch benevolence face 202 and die 10 are consistent also can to form a die cavity (not label) in order to forming plastic cement spare (not label).The middle part is respectively equipped with centre hole and taper pin hole (figure does not show) along the axis both sides, die cavity is directed reach in this centre hole and taper pin hole, and lower support plate 24 middle parts are provided with an opening 242.

Ejecting mechanism 3 comprises first assembly (not label), a plurality of taper pins 35 of second assembly (not label), a plurality of thimble 36, a plurality of shutter 37 and push rod 38.First assembly is made up of first push pedal 30 and first panelling 31, second assembly is made up of second push pedal 33 and second panelling 34, first push pedal 30, first panelling 31, second push pedal 33 and second panelling 34 stack successively and are arranged at accommodation space 26 and can move vertically in it, first push pedal 30 closes on punch 20, the second panellings 34 and closes on lower support plate 24.First push pedal 30 and first panelling 31 link into an integrated entity by fixture such as screw (figure does not show) etc.Second push pedal 33 and second panelling 34 also link into an integrated entity by fixture such as screw (figure does not show) etc., and its middle part is provided with opening 334, the second push pedals 33 and also is arranged with a plurality of containing holes 332 vertically.

Taper pin 35 is a brace, roughly be fixed in one of first push pedal 30 end by taper pin seat 352 vertically, its diameter near one of taper pin seat 352 end is slightly less than the top, the shape on its top is identical with the shape of plastic parts especially its complex region, realize the function that it ejects so that can well fit during contact, and can reduce the phenomenon that plastic parts bleaches preferably because the contact-making surface of taper pin 35 and plastic parts is big, the shape that this taper pin 35 is axial and the taper pin hole of punch are roughly the same, the top tilts slightly towards the medial axis direction of punch 20, when first push pedal 30 and first panelling 31 when ejecting the motion of position or retracted position its taper pin hole of slidably passing punch 20 middle parts towards die cavity advance or away from.

Thimble 36 is the elongated shape straight-bar, it comprises root 362 and outside 364, root 362 is fixed in second push pedal 33, outside 364 extend axially from root 362 and to pass first panelling 31 and first push pedal 30, when first push pedal 30 and first panelling 31 when ejecting the motion of position or retracted position its centre hole that slidably passes punch 20 middle parts towards die cavity advance or away from.

Shutter 37 is arranged at first panelling 31 and second push pedal, 33 two ends, it comprises head and afterbody, head is fixedly installed in first panelling 31, afterbody is placed in the containing hole 332 of second push pedal 33 and with it and closely cooperates, thereby first panelling 31 and second push pedal 33 can be linked into an integrated entity, this shutter 37 is selected from standard component.

Push rod 38 is the transmission device of ejecting mechanism 3, it also is provided with vertically, one end can pass respectively support plate 24 under the second housing 2 opening 242, second panelling 34 and second push pedal 33 opening 334 and replace first panelling 31, the other end and driving mechanism (figure does not show) link to each other and can move back and forth.

This ejecting mechanism 3 further comprises and is symmetricly set in a returning device 39 more than the first assembly two ends, this returning device 39 is made up of return guide pillar 392 and respective springs 394 in the present embodiment, one of return guide pillar 392 end is installed on first push pedal 30, the other end extends in the accommodation space 26, spring 394 is placed on this return guide pillar 37, first push pedal, 30, one ends that one end is replaced ejecting mechanism 3 support punch 20.

This ejecting mechanism 3 also further comprises a plurality of pull bars 4, and one of this pull bar 4 end is fixed in support plate 24 under the second housing 2, and this end extends a mobile jib 41 vertically, and the other end of this mobile jib 41 is provided with flange 40.The two ends of second push pedal 33 and second panelling 34 are provided with the through hole 306 of allowing that pull bar 4 passes through, the diameter of this through hole 306 is a bit larger tham the diameter of the mobile jib 41 of pull bar 4, first push pedal 30 and first panelling, 31 two ends also are provided with the through hole 308 of allowing that flange 40 passes through, these through hole 308 diameters are a bit larger tham the diameter of the flange 40 of pull bar 4, through hole 306 and through hole 308 pass to the mobile jib 41 of allowing pull bar 4 mutually and relatively move in it, flange 40 is placed in the through hole 308 and can props up second push pedal 33, the other end is fixed in support plate 24 under the second housing 2, when ejecting mechanism 3 ejects towards plastic parts after the position moves the distance identical with the mobile jib 41 of pull bar 4, the flange 40 of this pull bar 4 is replaced second push pedal 33 and is held second push pedal 33, blocks it and moves ahead with ejecting mechanism 3.

The plastic parts moulding finishes before the not die sinking taking-up, second panelling 34 of ejecting mechanism 3 faces by support plate 24 under the second housing 2, the flange 40 of pull bar 4 is placed in the through hole 308, when needing to take out plastic parts after the die sinking, push rod 38 is stressed to be replaced first panelling 31 and promotes it and advance, because of shutter 37 links into an integrated entity first panelling 31 and second push pedal 33, thereby moving first push pedal 30 of forward (FWD) before first panelling 31, first panelling 31, the whole advanced in unison of second push pedal 33 and second panelling 34, also promote taper pin 35 and thimble 36 moves ahead, beginning first section ejects, this moment, the spring 38 of returning device 39 was in compressive state, push rod 38 continues to move ahead and holds second push pedal 33 until pull bar 4, so that second push pedal 33 is stopped, under the continuation ejection of push rod 38, first panelling 31 continues to move ahead, shutter 37 is with from second push pedal 33, the thimble 36 that is fixed thereon also stops to move ahead and no longer plastic parts is implemented and ejected, this moment, taper pin 35 still moved with the advance the puck of first panelling 31 and first push pedal 30, entering second section ejects, until plastic parts is ejected from die cavity, this process medi-spring 38 further is compressed.Afterwards, push rod 38 is recalled with driving mechanism, return motion is done in elastic force ejection first push pedal 30 of spring 38, first push pedal 30 promotes first panelling 31 and does synchronous return motion, the afterbody of shutter 37 is pressed in the containing hole 332 of second push pedal 33, so second push pedal 33 and second panelling 34 also are pushed towards the origin-location motion until resetting the circulation of preparation beginning next round.

Claims

1. push-out mechanism for plastic jetting mold, it is characterized in that: this ejecting mechanism comprises:

First assembly;

Second assembly, itself and above-mentioned first assembly stack successively;

Taper pin, the one end is fixed in first assembly, and the other end extends vertically;

Thimble, the one end is fixed in second assembly, and the other end also passes first assembly vertically and extends;

Shutter, what it was movable is installed in first assembly and second assembly;

Pull bar, the one end is fixed on the mould, and the other end passes second assembly and this end is provided with the flange that is placed in slidably in first assembly, and this flange is kept out this second assembly, limits the sliding distance of this second assembly;

Push rod, one end can pass second assembly, and to replace first assembly reciprocating.

2. as using the mould of ejecting mechanism as described in the claim 1, it is characterized in that: this plastic injecting mold comprises that a die, is fixed in a lower support plate and surrounds the punch of an accommodation space with this connector and lower support plate by a connector, this die is with the coaxial setting of punch and can form a die cavity, and described ejecting mechanism is placed in this accommodation space.

3. mould as claimed in claim 2 is characterized in that: an end of described pull bar is fixed in lower support plate.

4. mould as claimed in claim 3, it is characterized in that: described this ejecting mechanism further comprises returning device, this returning device is made up of return guide pillar and spring, return guide pillar one end is installed on first assembly, the other end extends in the accommodation space vertically, spring is placed on this return guide pillar, and an end is replaced ejecting mechanism first assembly, and an end supports punch.

5. mould as claimed in claim 4, it is characterized in that: described this first assembly comprises first push pedal and first panelling, it links into an integrated entity by fixture, second assembly comprises second push pedal and second panelling, it also links into an integrated entity by fixture, first push pedal, first panelling, second push pedal and second panelling stack successively and are arranged at accommodation space and can move the contiguous punch of first push pedal, the contiguous lower support plate of second panelling vertically in it.

6. mould as claimed in claim 5 is characterized in that: described this fixture is a screw.

7. mould as claimed in claim 6 is characterized in that: described this taper pin is fixed in one of first push pedal end by a taper pin seat, and its diameter near one of taper pin seat end is slightly less than the top, and punch can be passed in its top, and shape is identical with the shape of plastic parts.

8. mould as claimed in claim 7 is characterized in that: described this second push pedal is provided with containing hole vertically.

9. mould as claimed in claim 8, it is characterized in that: described this shutter is arranged at first panelling and the second push pedal two ends, it comprises head and afterbody, head is fixedly installed in first panelling, afterbody is placed in the containing hole of above-mentioned second push pedal and with it and closely cooperates, can leave or be pressed into this containing hole when being subjected to suitable power, this shutter links into an integrated entity first panelling and second push pedal when this afterbody is pressed in the containing hole.