CN217670855U - Automatic cut mouth of a river mould - Google Patents

Abstract

The utility model belongs to the technical field of the mould, more specifically relates to an automatic cut mouth of a river mould, including the front mould board that connects in order, back template and mould bottom plate, the front mould board is provided with the die cavity and the runner that is linked together with the die cavity, is the die joint between front mould board and the back template, is provided with the ejecting system who links to each other with the die cavity and be used for ejecting product on the mould bottom plate, still wears to locate the cutter system in the back template including the activity, and ejecting system links to each other with cutter system and drives cutter system along the motion of perpendicular to die joint direction in order to cut off being connected of runner and die cavity. The utility model discloses can realize automatic cutting the mouth of a river, and the cutter need not external power supply, and the structure is comparatively simple, and is with low costs.

Description

Automatic cut mouth of a river mould

Technical Field

The utility model belongs to the technical field of pipeline mould, more specifically relates to an automatic cut mouth of a river mould.

Background

The multi-cavity product of the PVC-U water supply pipe product mold has more glue inlets, so a large amount of manpower resources are needed for water gap shearing operation in the production process. The conventional operation at present is a technology of manually trimming a water gap and automatically cutting the water gap on a parting surface. Manual trimming of the water gap is not repeated; the automatic water gap cutting technology of the parting surface is easy to cause the size limitation of a mold and the complexity of external accessories due to the fact that the automatic water gap cutting technology needs to be matched with an injection molding machine, and a common automatic cutter can only simultaneously cut the water gap on the left and the right of a cavity, so that the automatic water gap cutting of multiple cavities can not be realized. Therefore, the die is not suitable for a multi-cavity die for PVC-U water supply pipe products.

According to the mold for automatically cutting off the water gap in the prior art, after a fixed mold and a movable mold are opened, a runner thimble is abutted to a runner, a product thimble is abutted to a product, a cylinder and an oil cylinder are respectively fixed on a baffle, the cylinder is hung and buckled with a cutter bar, the oil cylinder is hung and buckled with an oil cylinder hanging plate, the oil cylinder hanging plate is fixed behind a sliding block seat through screws, the cutter bar penetrates through a hole of the sliding block seat to slide, so that a cutter fixed on the cutter bar to move, when an ejector plate is jacked by an external injection molding machine, a pressing block is lifted, a pouring gate of the runner is jacked, at the moment, the cylinder drives the cutter bar to move to drive the cutter to cut off the pouring gate of the runner, then the ejector plate resets, the pressing block also resets, a control valve of the cylinder controls the cylinder to retreat, so that the pressing block is jacked and reset through the ejector plate, and the controller valve controls the advance and retreat of the cylinder to realize the purpose of automatically cutting off the pouring gate in the mold. However, such a scheme needs to drive the cutter bar and the cutter to move through an external cylinder, which increases the size and cost of the mold, and the complicated structure of the mold will bring higher failure rate and maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome at least one defect among the above-mentioned prior art, provide an automatic cut mouth of a river mould, it is integrated with the mould structure degree of depth, does not need external power, and the structure is comparatively simple, and the cost is lower.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides an automatic cut mouth of a river mould, including the front mould board that connects in order, back template and bottom plate, the front mould board is provided with the die cavity and the runner that is linked together with the die cavity, be the die joint between front mould board and the back template, be provided with the ejection system who links to each other with the die cavity and be used for ejecting product on the bottom plate of the mould, still wear to locate the cutter system in the back template including the activity, ejection system links to each other with cutter system and drives cutter system along the motion of perpendicular to die joint direction in order to cut off being connected of runner and die cavity.

Through with the cutter system integration on the mould in this scheme, and drive by the ejection system of mould, do not need external power device to drive the cutter system, such mould structure is comparatively simple compact, greatly reduced the manufacturing cost of mould, and theoretical the fault rate is lower, and cost of maintenance is lower.

As a further improved structure form, the rear template is provided with a first slide way of which the axis is vertical to the parting surface, the end surface of the first slide way is connected with the flow passage, the cutter system comprises a cutter bar and a blade which are arranged in the first slide way in a sliding way, the blade is arranged at one end of the cutter bar, and the other end of the cutter bar is connected with the ejection system.

As a further improved structural form, the ejection system comprises a first ejection plate, a second ejection plate, an ejector pin and a driving mechanism for driving the first ejection plate and the second ejection plate to move, the first ejection plate and the second ejection plate are sequentially stacked on one side of the mold bottom plate close to the rear mold plate, one end of the ejector pin is connected with the first ejection plate, the other end of the ejector pin penetrates through the second ejection plate and the rear mold plate and is inserted into the cavity, and the second ejection plate is connected with the cutter bar.

As a further improved structural form, the driving mechanism comprises an ejection block and a limit screw, the ejection block penetrates through the die bottom plate and the first ejection plate and is connected with the second ejection plate, the first ejection plate is provided with a limit hole penetrating through the first ejection plate along the ejection direction, one end of the limit screw penetrates through the limit hole and is connected with the second ejection plate, and the other end of the limit screw and the end face of the limit hole, far away from the second ejection plate, are spaced.

As a further improved structure form, the limiting hole comprises a first through hole and a second through hole which are coaxially communicated, the first through hole is positioned on one side, away from the second ejector plate, of the first ejector plate, the second through hole is positioned on one side, close to the second ejector plate, of the first ejector plate, the diameter of the first through hole is larger than that of the head of the limiting screw, and the diameter of the head of the limiting screw is larger than that of the second through hole.

As a further improved structure form, the front template is further provided with a stop block system for controlling the opening and closing of the first slide way, and the stop block system is connected with the front template and driven by the front template to move along a direction parallel to the parting surface and far away from the first slide way.

As a further improved structural form, the stop block system comprises an insert, a slide block, an inclined guide post, a second slide way and an avoidance cavity, wherein the second slide way and the avoidance cavity are arranged on one side, close to the front template, of the rear template, the second slide way extends along a direction parallel to the parting surface, the avoidance cavity extends towards a direction far away from the front template, the slide block is arranged in the second slide way in a sliding mode, one end of the insert is connected with the slide block, the other end of the insert covers the end face of the first slide way, the inclined guide post penetrates through the slide block and is in sliding fit with the slide block, one end of the inclined guide post is connected with the front template, the other end of the inclined guide post is inserted into the avoidance cavity, and the axial lead of the inclined guide post is intersected with the parting surface.

As a further improved structural form, the cutter bar is detachably provided with a cutter frame, and the cutter blade is detachably arranged on the cutter frame.

As a further improved structure form, the structure further comprises a return pin, one end of the return pin is connected with the second ejector plate, and the other end of the return pin penetrates through the rear template and is connected with the front template.

As a further improved structure form, one end of the second slide way, which is far away from the first slide way, is provided with a limiting block.

Compared with the prior art, the beneficial effects are:

the utility model discloses an aspect begins first slide on the back template, and the cutter system wears to establish in first slip and can be driven by ejection system, and the two segmentation ejection motions of ejection system are respectively to cutter system and thimble effect, cut off the mouth of a river earlier and then ejecting product, have simplified the overall structure of taking automatic mouth of a river mould of cutting, and do not need external power to cutter system drive, have reduced the manufacturing cost of mould; on the other hand dog system drives through the motion of front template, also need not external power, can realize the closure to first slide, avoids the melt in the runner to get into and blocks up first slide in the first slide, guarantees the normal work of mould.

Drawings

Fig. 1 is a top view of an automatic nozzle cutting mold according to embodiment 1 of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is the internal structure schematic diagram of the automatic nozzle cutting mold according to embodiment 3 of the present invention.

The mold comprises a front mold plate 100, a cavity 101, a runner 102, a rear mold plate 200, a first slide rail 201, a mold bottom plate 300, an ejection system 400, a first ejection plate 401, a second ejection plate 402, an ejector pin 403, a driving mechanism 404, an ejection block 4041, a limit screw 4042, a limit hole 405, a limit hole 4051, a first through hole 4052, a second through hole 4052, a cutter system 500, a cutter bar 501, a cutter blade 502, a cutter rest 503, a cutter rest 600, a stopper system 601, an insert 602, a slide block 603, an inclined guide column 604, a second slide rail 605, an avoidance cavity 606, a stopper 606 and a return pin 700.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Example 1:

as shown in fig. 1 to 3, a first embodiment of an automatic water gap cutting mold includes a front mold plate 100, a rear mold plate 200, and a mold base plate 300, which are connected in sequence, wherein the front mold plate 100 is provided with a cavity 101 and a runner 102 communicated with the cavity 101, a parting surface is formed between the front mold plate 100 and the rear mold plate 200, the mold base plate 300 is provided with an ejection system 400 connected with the cavity 101 and used for ejecting a product, and the mold base plate further includes a cutter system 500 movably penetrating through the rear mold plate 200, and the ejection system 400 is connected with the cutter system 500 and drives the cutter system 500 to move in a direction perpendicular to the parting surface so as to cut off the connection between the runner 102 and the cavity 101.

It should be noted that the automatic water gap cutting mold in this embodiment should also include other additional structures to achieve the complete mold function, and detailed description is omitted here.

The rear mold plate 200 in this embodiment is provided with a first slide 201 whose axis is perpendicular to the parting plane, the end surface of the first slide 201 is connected with the runner 102, the cutter system 500 includes a cutter bar 501 and a blade 502 slidably disposed in the first slide 201, the blade 502 is installed at one end of the cutter bar 501, and the other end of the cutter bar 501 is connected with the ejection system 400. Specifically, the blade 502 is aligned to one side of the runner 102 close to the cavity 101, and the ejector system 400 drives the cutter bar 501 and the blade 502 to slide along the first slide 201, so that the blade 502 is inserted into the joint of the runner 102 and the cavity 101, that is, the runner 102 and a product are separated, thus the automatic water gap cutting function is realized, the use of parts of a mold structure is reduced, and the mold manufacturing cost and the later maintenance cost can be reduced.

The ejection system 400 in this embodiment includes a first ejection plate 401, a second ejection plate 402, an ejector pin 403, and a driving mechanism 404 for driving the first ejection plate 401 and the second ejection plate 402 to move, the first ejection plate 401 and the second ejection plate 402 are sequentially stacked on one side of the mold base plate 300 close to the back mold plate 200, one end of the ejector pin 403 is connected to the first ejection plate 401, the other end of the ejector pin passes through the second ejection plate 402 and the back mold plate 200 and is inserted into the cavity 101, and the second ejection plate 402 is connected to the tool bar 501. The driving mechanism 404 drives the first ejector plate 401 and the second ejector plate 402 to perform ejection movement, so as to drive the cutter and the ejector pin 403 to move, thereby respectively cutting off the flow channel 102 and ejecting the product; it should be noted that the first ejector plate 401 and the second ejector plate 402 generally include a fixing plate and a supporting plate, which are well known in the art and will not be described in detail herein.

The driving mechanism 404 in this embodiment includes an ejection block 4041 and a limit screw 4042, the ejection block 4041 penetrates through the mold bottom plate 300 and the first ejector plate 401 and is connected to the second ejector plate 402, the first ejector plate 401 is provided with a limit hole 405 penetrating through the first ejector plate 401 along the ejection direction, one end of the limit screw 4042 passes through the limit hole 405 and is connected to the second ejector plate 402, and the other end of the limit screw 4042 and the limit hole 405 are separated from each other by a distance between end faces of the second ejector plate 402. In the specific implementation process, the ejecting block 4041 is connected with an external injection molding machine, the external injection molding machine is driven by the external injection molding machine, the external injection molding machine drives the ejecting block 4041 to move along the ejecting direction, so that the second ejecting plate 402 moves towards the direction close to the rear mold plate 200, in the process, the moving blade 502 is inserted into the position where the flow channel 102 is connected with the mold cavity 101, and the water gap is cut off, because a distance is reserved between the limiting hole 405 and the head of the limiting screw 4042, after the second ejecting plate 402 moves for a distance, the limiting screw 4042 is limited by the limiting hole 405, so that the first ejecting plate 401 and the ejector pin 403 are driven to move, and products are ejected.

The limiting hole 405 in this embodiment includes a first through hole 4051 and a second through hole 4052 that are coaxially communicated, the first through hole 4051 is located on one side of the first ejector plate 401 away from the second ejector plate 402, the second through hole 4052 is located on one side of the first ejector plate 401 close to the second ejector plate 402, the diameter of the first through hole 4051 is greater than the diameter of the head of the limiting screw 4042, and the diameter of the head of the limiting screw 4042 is greater than the diameter of the second through hole 4052. Therefore, the limit screw 4042 is equivalent to a secondary ejection structure, the limit screw 4042 always moves along with the second ejection plate 402, and in the front-section movement process of the second ejection plate 402, the head of the limit screw 4042 moves in the first through hole 4051 until the head of the limit screw 4042 contacts the end of the second through hole 4052, and the limit screw 4042 is clamped, so that the first ejection plate 401 is driven to perform ejection movement; the structure is simple, excessive power devices cannot be added, and the manufacturing cost of the die is greatly reduced.

The front mold plate 100 in this embodiment is further provided with a stopper system 600 for controlling the opening and closing of the first slide 201, and the stopper system 600 is connected to the front mold plate 100 and driven by the front mold plate 100 to move along a direction parallel to the parting plane and away from the first slide 201.

Specifically, the stop system 600 includes an insert 601, a slider 602, an oblique guide pillar 603, a second slide way 604 and an avoidance cavity 605, the second slide way 604 and the avoidance cavity 605 are disposed on one side of the rear mold plate 200 close to the front mold plate 100, the second slide way 604 extends in a direction parallel to the parting surface, the avoidance cavity 605 extends in a direction away from the front mold plate 100, the slider 602 is slidably disposed in the second slide way 604, one end of the insert 601 is connected to the slider 602, the other end of the insert 601 covers the end surface of the first slide way 201, the insert 601 is flush with one side of the rear mold plate 200 close to the front mold plate 100, the oblique guide pillar 603 penetrates through the slider 602 and is in sliding fit with the slider 602, one end of the oblique guide pillar 603 is connected to the front mold plate 100, the other end of the oblique guide pillar 603 is inserted into the avoidance cavity 605, and the axial lead of the oblique guide pillar 603 intersects with the parting surface. Specifically, the inclined guide post 603 inclines away from the first slide 201 from the front mold plate 100 to the rear mold plate 200, initially, the insert 601 covers the end of the first slide 201 and receives the runner 102, so as to prevent the melt in the runner 102 from entering the first slide 201, when the mold is opened, the front mold plate 100 moves away from the rear mold plate 200 to drive the inclined guide post 603 to move in the same direction, in this process, the slider 602 slides out in the direction away from the first slide 201 under the action of the inclined guide post 603, and simultaneously drives the insert 601 to move away from the runner 102 and the first slide 201, the runner 102 is exposed in front of the blade 502 in the first slide 201, and then the blade 502 can cut off the nozzle under the driving of the ejection system 400.

The knife holder 501 in this embodiment is detachably provided with a knife holder 503, and the blade 502 is detachably mounted on the knife holder 503. Specifically, the blade 502 is provided with a tenon, the tool holder 503 is provided with a mortise, and the blade 502 is joggled with the tool holder 503, so that the structure is convenient to disassemble and assemble, and meanwhile, a plurality of blades 502 can be installed on the tool holder 503 to realize the function of cutting off a plurality of water gaps simultaneously. The mortises are arranged on two sides of the tool holder 503 in the embodiment, that is, two blades 502 can be arranged on the tool holder 503, so that two water gaps can be cut off simultaneously. Of course, the number of the blades 502 may be set according to the requirement in the specific implementation process, which is not limited herein.

The present embodiment further includes a clip 700, wherein one end of the clip 700 is connected to the second ejector plate 402, and the other end thereof penetrates through the rear mold plate 200 and is connected to the front mold plate 100. When the molds are closed, the front mold plate 100 moves towards the rear mold plate 200, so that the second ejector plate 402 and the first ejector plate 401 are driven to reset through the return pin 700 to prepare for the next injection molding.

It should be noted that the number of cavities 101 and the number of cutter systems 500 are not limited in this embodiment, and in the specific implementation process, a plurality of cavities 101 and a plurality of cutter systems 500 may be disposed on the same mold to improve the production efficiency.

The working principle of the embodiment is as follows:

when the mold is closed, molten materials are poured into the cavity 101 from the runner 102 and cooled to form a product, an external injection molding machine drives the front mold plate 100 to open the mold, the front mold plate 100 drives the insert 601 to open the first slide 201, the runner 102 is exposed in front of the blade 502, then the injection molding machine pushes the ejection block 4041, the ejection block 4041 ejects the second ejection plate 402, so as to drive the cutter bar 501 and the blade 502 to move towards the front mold plate 100 to cut off a water gap, after the second ejection plate 402 moves for a certain distance, the limit screw 4042 is limited, the first ejection plate 401 moves towards the front mold plate 100 under the drive of the second ejection plate 402 to eject the product, after the rear injection molding machine pushes the front mold plate 100 to close the mold, the front mold plate 100 moves towards the rear mold plate 200, and the second ejection plate 402 and the first ejection plate 401 are driven to return through the return needle 700, so as to cyclically realize continuous injection molding work.

Example 2:

the difference between this embodiment and embodiment 1 is only that the driving mechanism 404 in this embodiment includes an ejection block 4041 and a limit screw 4042, the ejection block 4041 penetrates through the mold bottom plate 300 and the first ejection plate 401 and is connected to the second ejection plate 402, the second ejection plate 402 is provided with a third through hole, the limit screw 4042 penetrates through the second ejection plate 402 via the third through hole and is in sliding fit with the second ejection plate 402, a tail of the limit screw 4042 is connected to the first ejection plate 401, a head of the limit screw is located on a side of the second ejection plate 402 away from the first ejection plate 401 and has a gap with the second ejection plate 402, and a diameter of the third through hole is smaller than a diameter of the head of the limit screw 4042, so that a secondary ejection function of the ejection system 400 can also be realized.

Example 3:

as shown in fig. 4, a third embodiment of an automatic water gap cutting mold is provided, which is different from embodiment 1 or embodiment 2 only in that a limit block 606 is disposed at an end of the second slide way 604 far from the first slide way 201 in this embodiment to prevent the slide block 602 from falling off from the second slide way 604 of the mold.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An automatic water gap cutting die comprises a front die plate (100), a rear die plate (200) and a die bottom plate (300) which are sequentially connected, wherein the front die plate (100) is provided with a cavity (101) and a runner (102) communicated with the cavity (101), a parting surface is formed between the front die plate (100) and the rear die plate (200), and the die bottom plate (300) is provided with an ejection system (400) which is connected with the cavity (101) and used for ejecting a product; the mold is characterized by further comprising a cutter system (500) movably arranged in the rear mold plate (200) in a penetrating mode, wherein the ejection system (400) is connected with the cutter system (500) and drives the cutter system (500) to move along the direction perpendicular to the parting surface so as to cut off the connection between the flow channel (102) and the mold cavity (101).

2. The automatic water gap cutting die according to claim 1, wherein the rear die plate (200) is provided with a first slide way (201) with an axis perpendicular to the parting plane, the end surface of the first slide way (201) is connected with the runner (102), the cutter system (500) comprises a cutter bar (501) and a blade (502) which are slidably arranged in the first slide way (201), the blade (502) is arranged at one end of the cutter bar (501), and the other end of the cutter bar (501) is connected with the ejection system (400).

3. The automatic water gap cutting die according to claim 2, wherein the ejection system (400) comprises a first ejection plate (401), a second ejection plate (402), an ejector pin (403), and a driving mechanism (404) for driving the first ejection plate (401) and the second ejection plate (402) to move, the first ejection plate (401) and the second ejection plate (402) are sequentially stacked on one side of the die bottom plate (300) close to the rear die plate (200), one end of the ejector pin (403) is connected to the first ejection plate (401), the other end of the ejector pin passes through the second ejection plate (402) and the rear die plate (200) and is inserted into the cavity (101), and the second ejection plate (402) is connected to the cutter bar (501).

4. The automatic water gap cutting die according to claim 3, wherein the driving mechanism (404) comprises an ejection block (4041) and a limit screw (4042), the ejection block (4041) penetrates through the die base plate (300) and the first ejection plate (401) and is connected with the second ejection plate (402), the first ejection plate (401) is provided with a limit hole (405) penetrating through the first ejection plate (401) along an ejection direction, one end of the limit screw (4042) penetrates through the limit hole (405) and is connected with the second ejection plate (402), and the other end of the limit screw (4042) is spaced from an end face, away from the second ejection plate (402), of the limit hole (405).

5. The automatic nozzle cutting die according to claim 4, wherein the limiting hole (405) comprises a first through hole (4051) and a second through hole (4052) which are coaxially communicated, the first through hole (4051) is located on one side of the first ejector plate (401) far away from the second ejector plate (402), the second through hole (4052) is located on one side of the first ejector plate (401) close to the second ejector plate (402), the diameter of the first through hole (4051) is larger than that of the head of the limiting screw (4042), and the diameter of the head of the limiting screw (4042) is larger than that of the second through hole (4052).

6. The automatic water gap cutting die according to claim 5, wherein a stopper system (600) for controlling the opening and closing of the first slide way (201) is further arranged on the front die plate (100), the stopper system (600) is connected with the front die plate (100) and is driven by the front die plate (100) to move along a direction parallel to the parting plane and away from the first slide way (201).

7. The automatic water gap cutting die according to claim 6, wherein the stopper system (600) comprises an insert (601), a slide block (602), an inclined guide post (603), a second slide way (604) and an avoidance cavity (605) which are arranged on one side of the rear die plate (200) close to the front die plate (100), the second slide way (604) extends in a direction parallel to the parting surface, the avoidance cavity (605) extends in a direction away from the front die plate (100), the slide block (602) is slidably arranged in the second slide way (604), one end of the insert (601) is connected with the slide block (602), the other end of the insert covers the end surface of the first slide way (201), the inclined guide post (603) penetrates through the slide block (602) and is in sliding fit with the slide block (602), one end of the inclined guide post (603) is connected with the front die plate (100), the other end of the inclined guide post is inserted in the avoidance cavity (605), and the axial lead of the inclined guide post (603) intersects with the parting surface.

8. The automatic water gap cutting die according to claim 7, wherein the knife bar (501) is detachably provided with a knife rest (503), and the blade (502) is detachably mounted on the knife rest (503).

9. The automatic nozzle cutting die according to claim 8, further comprising a return pin (700), wherein one end of the return pin (700) is connected to the second ejector plate (402), and the other end of the return pin (700) penetrates through the rear die plate (200) and is connected to the front die plate (100).

10. An automatic water gap cutting die according to any one of claims 7 to 9, wherein a limiting block (606) is arranged at one end of the second slide way (604) far away from the first slide way (201).

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