CN210525741U

CN210525741U - Ejection mechanism for injection mold

Info

Publication number: CN210525741U
Application number: CN201921108739.9U
Authority: CN
Inventors: 黎小鹤
Original assignee: Dongguan Guanglian Plastic Mold Products Co ltd
Current assignee: Dongguan Guanglian Plastic Mold Products Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-15
Anticipated expiration: 2029-07-16

Abstract

An ejection mechanism for an injection mold, comprising: roof, upper thimble board, lower floor thimble board and bottom plate, the bottom plate has the driving lever, and the upper end of driving lever has the kink, has the slip track in the thimble board of lower floor, has the slider in the slip track, and the lower extreme of driving lever passes the slider has first gag lever post between lower floor's thimble board and the bottom plate, has the second gag lever post between upper thimble board and the roof, is connected through the kicking bar between upper thimble board and the bottom plate, and the middle part of kicking bar has synchronous bulge loop, the slider with the upper end butt of synchronous bulge loop. The ejection mechanism can meet the requirements of synchronous ejection and accurate ejection position, ensures that the stress direction is consistent with the ejection direction, and has the advantages of simple structure, stable use, long service life and low maintenance cost.

Description

Ejection mechanism for injection mold

Technical Field

The utility model relates to an ejection mechanism especially relates to an ejection mechanism that injection mold used.

Background

In general, the ejection of the finished product from the mold is accomplished in one step, whether by a single or multiple component ejection mechanism. However, due to the special shape of the product or the requirement in mass production, if the product is still in the mold cavity after one ejection or cannot be automatically dropped, another ejection operation needs to be added. Such a design of the ejection action is called double ejection. Currently, manufacturers commonly employ two types of ejection mechanisms: a rocker structure and a spring structure.

As shown in fig. 1, the ejection mechanism of the rocker structure includes: the ejector pin plate comprises a top plate 101, an upper ejector pin plate 102, a lower ejector pin plate 103 and a bottom plate 104, wherein the top plate 101 is connected with the bottom plate 104 through a guide column 105, an impact rod 106 is arranged on the top plate 101, a warping plate 107 is arranged in the lower ejector pin plate 103, the impact rod 106 is just opposite to one end of the warping plate 107, a limiting rod 108 is further arranged between the lower ejector pin plate 103 and the top plate 101, and an ejector bar 109 is arranged between the lower ejector pin plate 103 and the bottom plate 104. The ejector rod 109 is used for driving the lower ejector plate 103 to move towards a direction away from the bottom plate 104, so that the lower ejector plate 103 and the bottom plate 104 are separated from each other until the impact rod 106 is in contact with one end of the warping plate 107, and primary ejection is completed; and the lower ejector plate 103 is continuously moved, the striking rod 106 pushes one end of the warping plate 107 to drive the warping plate 107 to rotate, the other end of the warping plate pushes the upper ejector plate 102, the upper ejector plate 102 and the lower ejector plate 103 are separated from each other until the top plate 101 is contacted with the limiting rod 108, and secondary ejection is completed. The wane structure can satisfy upper ejector plate and lower floor ejector plate synchronous ejection (upper ejector plate and lower floor ejector plate synchronous motion when ejecting for the first time promptly), solves the product and goes out sunken each ejecting deformation problem because of ejecting out the asynchronous item that exists. The wane structure adopts the lever principle through the striking to part the thimble board by force when the secondary is ejecting and realizes that the secondary is ejecting, nevertheless because the direction structure reason of atress, secondary ejection mechanism wearing and tearing are serious, need carry out periodic replacement, simultaneously because the reason of ejecting striking leads to the template to have the deformation, and the plane degree, the position degree and the relevant precision of mould change, have increased the unstable factor in mould later stage production process.

As shown in fig. 2, the ejection mechanism of the spring structure includes: the lifting mechanism comprises a top plate 201, an upper ejector plate 202, a lower ejector plate 203 and a bottom plate 204, wherein the top plate 201 is connected with the bottom plate 204 through a guide column 205, a spring 206 and an ejector rod 209 are arranged between the upper ejector plate 202 and the bottom plate 204, a first limiting rod 207 is arranged between the lower ejector plate 203 and the top plate 201, and a second limiting rod 208 is arranged between the upper ejector plate 202 and the top plate 201. The jacking rod 209 is used for driving the upper layer jacking needle plate 202 to move towards the direction away from the bottom plate 204, and the upper layer jacking needle plate 202 is driven to move towards the direction away from the bottom plate 204 under the action force of the spring 206 until the top plate 201 is contacted with the first limiting rod 207, so that the first jacking is completed; meanwhile, the ejector bar 209 separates the upper ejector plate 202 and the lower ejector plate 203 from each other until the second ejection is completed when the top plate 201 contacts the second stopper rod 208. The spring structure can utilize two gag lever posts to satisfy the requirement of ejecting accurate position location, but can't guarantee ejecting synchronous. The reason is that the structure drives the lower ejector plate to move by the spring elasticity, and because the spring elasticity of the ejector pin is delayed and the product is tightly held in the moment, the ejection is carried out for two times at the same time, so that the upper ejector plate and the lower ejector plate cannot meet the ejection synchronization, and the problems of ejection deformation and ejection depression exist in the ejection process. In addition, after the spring is used for a long time (the spring is always in an open compression state), metal fatigue is caused, and the whole using effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses technical scheme is to above-mentioned condition, provides an ejection mechanism that injection mold used in order to solve above-mentioned problem, ejection mechanism includes: roof, upper thimble board, lower floor thimble board and bottom plate, the roof upper strata thimble board lower floor's thimble board with the bottom plate is arranged in proper order, the bottom plate has the driving lever, the upper end of driving lever has the kink, the slip track has in the thimble board of lower floor, the slider has in the slip track, the lower extreme of driving lever passes the slider, lower floor thimble board with first gag lever post has between the bottom plate, upper strata thimble board with the second gag lever post has between the roof, upper strata thimble board with connect through the kicking bar between the bottom plate, the middle part of kicking bar has synchronous bulge loop, the slider with the upper end butt of synchronous bulge loop.

Further, the top plate is connected with the bottom plate through a guide post which passes through the upper layer ejector plate and the lower layer ejector plate,

furthermore, the number of the sliding tracks, the number of the sliding blocks and the number of the shifting rods are two, and the two sliding blocks are opposite to each other.

Further, the distance between the bent part and the sliding block is equal to the distance between the first limiting rod and the top plate.

Further, the sliding track is also provided with a fixing plate, the fixing plate is in an inverted U shape, the fixing plate is jointed with the upper end of the sliding block, and the fixing plate is parallel to the moving direction of the sliding block.

Further, the sliding track is also provided with a wear-resisting plate, the wear-resisting plate is in contact with the lower surface of the sliding block, and the wear-resisting plate is parallel to the moving direction of the sliding block.

After the technical scheme is adopted, the utility model discloses an effect is: the ejection mechanism with the structure can meet the requirements of synchronous ejection and accurate ejection position, ensures that the stress direction is consistent with the ejection direction, and has the advantages of simple structure, stable use, long service life and low maintenance cost.

Drawings

Fig. 1 is a schematic diagram of an ejection mechanism of a rocker structure in the prior art;

FIG. 2 is a schematic diagram of a prior art ejection mechanism of a spring configuration;

fig. 3 is a schematic view of the ejection mechanism according to the present invention.

Fig. 4 is a schematic view of the ejection mechanism according to the present invention in a first ejection state;

fig. 5 is a schematic view of the ejection mechanism according to the present invention in the second ejection state.

Detailed Description

It is specifically noted that the terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. All directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indicator is changed accordingly.

The technical solution of the present invention is further described below by way of examples:

the utility model provides an ejection mechanism that injection mold used, as shown in FIG. 3, ejection mechanism includes: a top plate 1, an upper ejector plate 2, a lower ejector plate 3, a bottom plate 4, a top plate 1, upper thimble board 2, lower floor thimble board 3 and bottom plate 4 are arranged in proper order, be connected through guide post 5 between roof 1 and the bottom plate 4, guide post 5 passes upper thimble board 2 and lower floor thimble board 3, bottom plate 4 has driving lever 6, the upper end of driving lever 6 has kink 61, horizontal slip track 30 has in the lower floor thimble board 3, slider 31 has in the slip track 30, slider 31 is passed to the lower extreme of driving lever 6, first gag lever post 7 has between lower floor thimble board 3 and the bottom plate 4, kink 61 equals the distance of first gag lever post 7 and roof 1 with slider 31, second gag lever post 8 has between upper roof board 2 and the roof 1, be connected through ejector bar 9 between upper roof board 2 and the bottom plate 4, ejector bar 9's middle part has synchronous bulge loop 91, slider 31 and synchronous bulge loop 91's upper end butt. As shown in fig. 4, the ejector rod 9 is used for driving the upper ejector plate 2 to move towards a direction away from the bottom plate 4, and the lower ejector plate 3 will move synchronously with the upper ejector plate 2 because the slide block 31 is abutted against the synchronous convex ring 91 until the first limiting rod 7 contacts with the top plate 1, so that the first ejection is completed; as shown in fig. 5, the upper ejector plate 2 continues to move, at this time, because the upper end of the shift lever 6 is bent, the bent portion 61 of the shift lever 6 shifts the slider 31, so that the slider 31 moves along the sliding track 30 and is separated from the synchronizing convex ring 91, the lower ejector plate 3 no longer moves synchronously with the upper ejector plate 2, the upper ejector plate 2 and the lower ejector plate 3 are separated from each other, until the second limiting rod 8 contacts with the top plate 1, and the second ejection is completed.

Specifically, with continued reference to fig. 3, in the present embodiment, there are two sliding tracks 30, two sliding blocks 31 and the shift lever 6, and the two sliding blocks 31 are opposite to each other. This ensures the stability of the synchronous movement of the lower ejector plate 3 and the upper ejector plate 2.

Specifically, the slide rail 30 further has therein a fixing plate 32, the fixing plate 32 has an inverted U-shape, the fixing plate 32 is engaged with the upper end of the slider 31, and the fixing plate 32 is parallel to the moving direction of the slider 31. The fixed plate 32 is pressed towards the sliding block 31, so that the sliding block 31 can be prevented from deflecting in the moving process, and the problem that the poking rod 6 fails to poke is solved.

Specifically, the sliding rail 30 further has a wear plate 33 therein, the wear plate 33 is in contact with a lower surface of the slider 31, and the wear plate 33 is parallel to the moving direction of the slider 31. The wear plate 33 can reduce the wear of the slider 31 and prolong the service life. In the present embodiment, the wear plate 33 is formed of a chromium alloy.

Therefore, the ejection mechanism with the structure can meet the requirements of synchronous ejection and accurate ejection position, and ensures that the stress direction is consistent with the ejection direction.

The above-mentioned embodiments are merely preferred examples of the present invention, and do not limit the scope of the present invention, so all equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.

Claims

1. An ejection mechanism for an injection mold, the ejection mechanism comprising: roof, upper ejector plate, lower floor ejector plate and bottom plate, the roof upper ejector plate lower floor ejector plate with the bottom plate arranges its characterized in that in proper order: the bottom plate has the driving lever, the upper end of driving lever has the kink, the slip track has in the thimble board of lower floor, the slider has in the slip track, the lower extreme of driving lever passes the slider, lower floor's thimble board with first gag lever post has between the bottom plate, upper layer thimble board with the second gag lever post has between the roof, upper layer thimble board with connect through the kicking bar between the bottom plate, the middle part of kicking bar has synchronous bulge loop, the slider with the upper end butt of synchronous bulge loop.

2. The ejection mechanism for an injection mold according to claim 1, characterized in that: the top plate is connected with the bottom plate through guide posts, and the guide posts penetrate through the upper ejector plate and the lower ejector plate.

3. The ejection mechanism for an injection mold according to claim 1, characterized in that: the sliding track, the sliding block and the shifting lever are two, and the two sliding blocks are opposite to each other.

4. The ejection mechanism for an injection mold according to claim 1, characterized in that: the distance between the bent part and the sliding block is equal to the distance between the first limiting rod and the top plate.

5. The ejection mechanism for an injection mold according to claim 1, characterized in that: the sliding rail is also provided with a fixing plate, the fixing plate is in an inverted U shape, the fixing plate is jointed with the upper end of the sliding block, and the fixing plate is parallel to the moving direction of the sliding block.

6. The ejection mechanism for an injection mold according to claim 1, characterized in that: the sliding track is also provided with a wear plate, the wear plate is in contact with the lower surface of the sliding block, and the wear plate is parallel to the moving direction of the sliding block.