Die structure and die capable of automatically cutting off water gap
By designing a mold structure with automatic water breaking ports, and using the coordinated movement of the thimble plate and the delayed thimble, the rapid and clean cutting of the plastic product water opening material and the product body is achieved, solving the problems of low production efficiency and product damage caused by manual shearing, and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202421972615.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the injection molding process of plastic products, the product body and the water outlet material have not been separated when the product is ejected, resulting in manual shearing, which consumes labor and time, increases production costs, and may damage the product.
Design a mold structure with automatic water cutout, including mold kernel, product thimble, water outlet thimble, delayed thimble and thimble plate. The thimble plate drives the movement of product thimble and water outlet thimble through the thimble plate, and use the delayed thimble to promote the water outlet thimble to achieve rapid and clean cutting of water outlet materials and products.
It improves the processing efficiency of separation of product body and water outlet material, reduces the uncertainty of manual operation, reduces production costs, and protects the aesthetics and structural integrity of the product.
Smart Images
Figure CN222987478U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold gate cutting, and particularly relates to a mold structure and a mold for automatically breaking gates. Background Art
[0002] For a plastic product processed by an injection molding process in a mold, during the ejection process, the product body and the gate part during feeding are not yet separated, so that the product body and the gate material at the gate form a whole. In order to obtain qualified plastic products, the operator must cut off this part of the gate material. This process not only consumes the labor force and time of the staff, increases the production cost, but also, due to the uncertainty of manual operation, is very likely to cause unnecessary damage to the plastic product, affecting its overall aesthetics and structural integrity. Summary of the Utility Model
[0003] The main purpose of the utility model is to propose a mold structure and a mold for automatically breaking gates, aiming to improve the processing efficiency of separating the product body and the gate material by the operator.
[0004] To achieve the above purpose, the mold structure for automatically breaking gates proposed by the utility model includes a mold core, a product ejector pin, a gate ejector pin, a delay ejector pin and an ejector plate. The product ejector pin, the gate ejector pin and the delay ejector pin are installed on the ejector plate. The ejector plate drives the product ejector pin, the gate ejector pin and the delay ejector pin to move. The product ejector pin acts on the product in the mold core. The gate ejector pin acts on the gate material and separates the gate material from the product. The gate ejector pin abuts against the delay ejector pin. A cavity is provided in the ejector plate. The delay ejector pin is movably arranged in the cavity. The height of the cavity is a preset height H. After the ejector plate drives the product ejector pin to move the preset height H, the delay ejector pin is pushed, and the delay ejector pin pushes the gate ejector pin to move.
[0005] In an embodiment, a limiting part is formed at the connection between the gate ejector pin and the delay ejector pin, and the limiting part is movably arranged in the cavity.
[0006] In an embodiment, the ejector plate includes a first ejector plate and a second ejector plate connected to each other. The first ejector plate is located on the side of the second ejector plate away from the mold core. One end of the product ejector pin is connected to the second ejector plate. The cavity includes a first half cavity and a second half cavity that communicate with each other. The first half cavity is provided in the second ejector plate, and the second half cavity is provided in the first ejector plate.
[0007] In one embodiment, the mold core has a sprue and a cold slug well provided in the sprue. The cold slug well has an undercut groove, and one end of the sprue ejector pin away from the delay ejector pin is movably connected within the sprue.
[0008] In one embodiment, a first connecting portion is provided on one side of the sprue ejector pin close to the delay ejector pin, and a second connecting portion is provided on one side of the delay ejector pin close to the sprue ejector pin. The first connecting portion connects the second connecting portion. The second connecting portion is movably provided within the second half cavity, and the first connecting portion is movably provided within the cavity.
[0009] In one embodiment, the first half cavity includes a first limiting section and a first through hole that communicate with each other. The outer diameter of the first limiting section is greater than the outer diameter of the first connecting portion; and / or, the second half cavity includes a second limiting section and a second through hole that communicate with each other. The outer diameter of the second limiting section is greater than the outer diameter of the second connecting portion.
[0010] In one embodiment, the mold structure with automatic sprue break also includes a bottom plate, which is located on the side of the ejector plate away from the mold core. The bottom plate has a through hole for installing the machine table ejector rod.
[0011] In one embodiment, the mold structure with automatic sprue break also includes a backing plate, which is located between the mold core and the ejector plate. The ejector pin passes through the backing plate and is inserted into the mold core, and the sprue ejector pin passes through the backing plate and is inserted into the mold core.
[0012] In one embodiment, the mold structure with automatic sprue break also includes a guide pillar. One end of the guide pillar is connected to the bottom plate, and the other end passes through the ejector plate and is inserted into the backing plate. The ejector plate can slide along the extending direction of the guide pillar.
[0013] The present utility model also proposes a mold, including the mold structure with automatic sprue break as described in any one of the above embodiments.
[0014] In the technical solution of the present utility model, when the ejector plate drives the product ejector pin to move and eject the product, the delay ejector pin is synchronously driven to drive the sprue ejector pin to move towards the direction close to the mold core. Due to the time difference in the ejection between the product ejector pin and the delay ejector pin and the sprue ejector pin, the sprue material and the product are cut off by the shear force, realizing a fast and clean sprue break, thereby improving the processing efficiency of the separation of the product body and the sprue material. Description of the Drawings
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.
[0016] Figure 1 It is a structural cross-sectional view of an embodiment of the mold structure with an automatic water break for the present invention;
[0017] Figure 2 is Figure 1 a partial enlarged view of part A in
[0018] Figure 3 is Figure 1 a partial enlarged view of part B in
[0019] Explanation of the reference numerals in the drawings:
[0020] 1. Mold core; 11. Sprue; 111. Cold slug well; 1111. Undercut groove; 2. Product ejector pin; 21. Limiting part; 22. Sprue ejector pin; 221. First connecting part; 23. Delay ejector pin; 231. Second connecting part; 3. Ejector plate; 31. Cavity; 311. First half cavity; 3111. First limiting section; 3112. First through hole; 312. Second half cavity; 3121. Second limiting section; 3122. Second through hole; 32. First ejector plate; 33. Second ejector plate; 4. Bottom plate; 41. Through hole; 5. Backing plate; 6. Ejector guide pin; 7. Support pillar.
[0021] The realization, functional features and advantages of the purpose of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments
[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0024] In addition, if the description involves "first", "second", etc. in the embodiments of the present utility model, the descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0025] For a plastic product processed by an injection molding process in a mold, during the ejection process, the product body and the gate 11 part during feeding have not been separated yet, so that the product body and the gate material at the gate 11 form a whole. In order to obtain a qualified plastic product, the operator must cut off this part of the gate material. This process not only consumes the labor and time of the staff, increases the production cost, but also, due to the uncertainty of manual operation, is very likely to cause unnecessary damage to the plastic product, affecting its overall aesthetics and structural integrity.
[0026] The present utility model provides a mold structure for automatically cutting off the gate.
[0027] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the mold structure for automatically cutting off the gate includes a mold core 1, a product ejector pin 2, a gate ejector pin 22, a delay ejector pin 23, and an ejector plate 3. The product ejector pin 2, the gate ejector pin 22, and the delay ejector pin 23 are installed on the ejector plate 3. The ejector plate 3 drives the product ejector pin 2, the gate ejector pin 22, and the delay ejector pin 23 to move. The product ejector pin 2 acts on the product in the mold core 1. The gate ejector pin 22 acts on the gate material and separates the gate material from the product. The gate ejector pin 22 abuts against the delay ejector pin 23. A cavity is provided in the ejector plate 3. The delay ejector pin 23 is movably disposed in the cavity. The height of the cavity is a preset height H. After the ejector plate 3 drives the product ejector pin 2 to move the preset height H, it pushes the delay ejector pin 23. The delay ejector pin 23 pushes the gate ejector pin 22 to move;
[0028] In this embodiment, the ejector plate 3 is arranged at a relative interval with respect to the mold core 1. The product ejector pin 2 is used to eject the product out of the mold core 1, and the sprue ejector pin 22 is used to eject the sprue material out of the mold core 1. One end of the product ejector pin 2 is connected to the ejector plate 3, and the other end of the product ejector pin 2 is movably inserted into the mold core 1. One end of the delay ejector pin 23 and the sprue ejector pin 22 is movably connected to the ejector plate 3, and the other end of the sprue ejector pin 22 is movably inserted into the mold core 1. The ejector plate 3 has a cavity 31 inside, and the height of the cavity 31 can be set to a preset height H, and the preset height H can be set according to the actual internal situation of the mold structure. The ejector plate 3 can be used to drive the product ejector pin 2 to move a preset height H and then eject the product in the mold core 1. The sprue material and the product body are cut off by shear force. At this time, the ejector plate 3 just contacts the delay ejector pin 23, so that the ejector plate 3 can drive the product ejector pin 2, the delay ejector pin 23 and the sprue ejector pin 22 to move simultaneously, and further enable the sprue ejector pin 22 to eject the sprue material out of the mold core 1, and further can realize quickly and cleanly disconnecting the product and the sprue 11, thereby improving the processing efficiency of separating the product body and the sprue material.
[0029] In this embodiment, the mold structure for automatically cutting off the sprue further includes a driving member for driving the ejector plate 3 to move. The driving member can be set as a machine table ejector rod, and the driving member is connected to the ejector plate 3.
[0030] In the technical solution of the present utility model, when the ejector plate 3 is used to drive the product ejector pin 2 to move and eject the product, the delay ejector pin 23 is synchronously driven to drive the sprue ejector pin 22 to move in the direction close to the mold core 1. Due to the time difference in the ejection between the product ejector pin 2 and the delay ejector pin 23 and the sprue ejector pin 22, the sprue material and the product are cut off by shear force, realizing quickly and cleanly cutting off the sprue, and further improving the processing efficiency of separating the product body and the sprue material.
[0031] As Figure 1 and Figure 2 shown, in this embodiment, a limiting portion 21 is formed at the connection of the sprue ejector pin 22 and the delay ejector pin 23, and the limiting portion 21 is movably arranged in the cavity 31.
[0032] In this embodiment, one side of the ejector plate 3 for installing the sprue ejector pin 22 and the delay ejector pin 23 has a cavity 31. One end of the sprue ejector pin 22 and the delay ejector pin 23 assembled with the ejector plate 3 has a limiting portion 21, and the limiting portion 21 is movably arranged in the cavity 31, so that after the ejector plate 3 moves a preset height H, the sprue ejector pin 22 and the delay ejector pin 23 are driven to move towards the sprue 11 after a delay. Specifically, in the direction of movement of the product ejector pin 2, by limiting that the distance for the ejector plate 3 to drive the product ejector pin 2 to move and eject the product is the same as the preset height H of the cavity 31, when the ejector plate 3 drives the product ejector pin 2 to eject the product in the mold core 1, the ejector plate 3 just contacts the delay ejector pin 23, so that the ejector plate 3 can drive the product ejector pin 2, the delay ejector pin 23 and the sprue ejector pin 22 to move simultaneously, and further the sprue ejector pin 22 can eject the sprue material out of the mold core 1.
[0033] In this embodiment, in the axial direction of the delay ejector pin 23, the length of the cavity 31 is greater than the length of the limiting portion 21.
[0034] As Figure 1 and Figure 2 shown, in this embodiment, the ejector plate 3 includes a first ejector plate 32 and a second ejector plate 33 which are connected to each other. The first ejector plate 32 is located on the side of the second ejector plate 33 away from the mold core 1. One end of the product ejector pin 2 is connected to the second ejector plate 33. The cavity 31 includes a first half-cavity 311 and a second half-cavity 312 which are communicated with each other. The first half-cavity 311 is arranged in the second ejector plate 33, and the second half-cavity 312 is arranged in the first ejector plate 32.
[0035] In this embodiment, in order to make it more convenient for the limiting portion 21 to move in the cavity 31, the cavity 31 is provided to include a first half-cavity 311 and a second half-cavity 312 which are communicated with each other. The first half-cavity 311 is arranged in the second ejector plate 33, and the second half-cavity 312 is arranged in the first ejector plate 32. In the axial direction of the delay ejector pin 23, the length dimension of the second half-cavity 312 is greater than the length dimension of the first half-cavity 311. When the ejector plate 3 drives the product ejector pin 2 to move, the limiting portion 21 moves in the first half-cavity 311 and the second half-cavity 312. When the ejector plate 3 drives the product ejector pin 2 to eject the product in the mold core 1, the limiting portion 21 just abuts against the bottom wall of the second half-cavity 312, so that the first ejector plate 32 starts to drive the delay ejector pin 23 and the sprue ejector pin 22 to move towards the sprue 11.
[0036] As Figure 1 and Figure 3As shown, in this embodiment, the mold core 1 has a sprue gate 11 and a cold slug well 111 provided in the sprue gate 11. The cold slug well 111 has an undercut groove 1111. One end of the sprue gate ejector pin 22 away from the delay ejector pin 23 is movably connected within the sprue gate 11.
[0037] In this embodiment, the mold core 1 has a sprue gate 11 and a cold slug well 111 provided in the sprue gate 11. The cold slug well 111 has an undercut groove 1111 for limiting the sprue gate material within the cold slug well 111. The undercut groove 1111 can be an annular groove. When the ejector pin 21 separates the product from the mold core 1, due to the resistance provided by the undercut groove 1111, the sprue gate material remains stationary within the cold slug well 111, and thus the sprue gate material and the product body are cut off by the shear force.
[0038] As Figure 1 and Figure 2 As shown, in this embodiment, a first connecting portion 221 is provided on one side of the sprue gate ejector pin 22 close to the delay ejector pin 23, and a second connecting portion 231 is provided on one side of the delay ejector pin 23 close to the sprue gate ejector pin 22. The first connecting portion 221 connects the second connecting portion 231 to form the limiting portion 21. The second connecting portion 231 is movably provided within the second half cavity 312, and the first connecting portion 221 is movably provided within the cavity 31.
[0039] In this embodiment, the first connecting portion 221 can be set as a first protruding portion that protrudes circumferentially along the sprue gate ejector pin 22 and is cylindrical, and the second connecting portion 231 can be set as a second protruding portion that protrudes circumferentially along the delay ejector pin 23 and is cylindrical. The cavity 31 can also be correspondingly set as an annular cavity, so that the limiting portion 21 moves more smoothly within the cavity 31.
[0040] In this embodiment, by providing the first connecting portion 221 to connect the second connecting portion 231 to form the limiting portion 21, the connection stability between the delay ejector pin 23 and the sprue gate ejector pin 22 is further improved.
[0041] As Figure 1 and Figure 2 As shown, in this embodiment, the first half cavity 311 includes a first limiting section 3111 and a first through hole 3112 that communicate with each other. The outer diameter of the first limiting section 3111 is greater than the outer diameter of the first connecting portion 221; and / or, the second half cavity 312 includes a second limiting section 3121 and a second through hole 3122 that communicate with each other. The outer diameter of the second limiting section 3121 is greater than the outer diameter of the second connecting portion 231.
[0042] In this embodiment, the inner wall of the first limiting section 3111 has a first contact surface. When the first contact surface abuts against the first connecting portion 221, the first connecting portion 221 is restricted by the first limiting section 3111 and stops moving further in the direction of the water inlet 11. In order to better limit the moving strokes of the first connecting portion 221 and the second connecting portion 231, the inner wall of the second limiting section 3121 on the side away from the first limiting section 3111 has a second contact surface. When the second contact surface abuts against the second connecting portion 231, the first ejector plate 32 starts to drive the delay ejector pin 23 to move, thereby restricting the moving stroke of the limiting portion 21 within the first half cavity 311 and the second half cavity 312.
[0043] In this embodiment, by setting the outer diameter of the first limiting section 3111 to be larger than the outer diameter of the first connecting portion 221, it is more convenient for the first limiting section 3111 to abut against the first connecting portion 221; by setting the outer diameter of the second limiting section 3121 to be larger than the outer diameter of the second connecting portion 231, it is more convenient for the second limiting section 3121 to abut against the second connecting portion 231.
[0044] As Figure 1 shown, in this embodiment, the mold structure for automatically breaking the water inlet further includes a bottom plate 4. The bottom plate 4 is located on the side of the ejector plate 3 away from the mold core 1, and the bottom plate 4 has a through hole 41 for installing the machine table ejector rod.
[0045] In this embodiment, in order to improve the connection stability between the machine table ejector rod and the bottom plate 4, by setting the bottom plate 4 to have a through hole 41, the machine table ejector rod passes through the bottom plate 4 through the through hole 41, so that the machine table ejector rod can drive the ejector plate 3 to move. It should be noted that the machine table ejector rod is not marked in the attached drawings of the specification.
[0046] As Figure 1 shown, in this embodiment, the mold structure for automatically breaking the water inlet further includes a backing plate 5. The backing plate 5 is located between the mold core 1 and the ejector plate 3. The product ejector pin 2 passes through the backing plate 5 and is inserted into the mold core 1, and the water inlet ejector pin 22 passes through the backing plate 5 and is inserted into the mold core 1.
[0047] In this embodiment, the backing plate 5 is used to check the flatness of the mold and trim the mold. The backing plate 5 also plays a role in protecting the mold and extending the service life of the mold. By setting the product ejector pin 2 to pass through the backing plate 5 and be inserted into the mold core 1, and the water inlet ejector pin 22 to pass through the backing plate 5 and be inserted into the mold core 1, the movement stability of the product ejector pin 2 and the water inlet ejector pin 22 relative to the mold core 1 is further improved.
[0048] In this embodiment, the mold structure for automatically breaking the water inlet further includes a square iron 7. The square iron 7 is located on one side of the ejector plate 3, and the square iron 7 connects the bottom plate 4 and the backing plate 5. The square iron 7 is used to support the ejector plate 3 and the backing plate 5, and the square iron 7 is also used to fix the bottom plate 4.
[0049] As Figure 1 shown, in this embodiment, the mold structure of the automatic gate cutting mechanism further includes a center lifter 6. One end of the center lifter 6 is connected to the bottom plate 4, and the other end passes through the ejector plate 3 and is inserted into the backing plate 5. The ejector plate 3 can slide along the extending direction of the center lifter 6.
[0050] In this embodiment, the center lifter 6 is mainly used to provide precise positioning and guidance for the ejector plate 3, ensuring that the ejector plate 3 can slide smoothly along the axial direction of the center lifter 6 under the guidance of the center lifter 6, so that the product ejector pin 2 and the gate ejector pin 22 can maintain good balance and smoothness during the ejection action, thereby improving the stability and efficiency of the entire ejection process.
[0051] The present utility model also proposes a mold, which includes the mold structure of the automatic gate cutting mechanism. The specific structure of the mold structure of the automatic gate cutting mechanism refers to the above embodiment. Since this mold adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.
[0052] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A mold structure for an automatic water shut-off, characterized in that: include: A mold core, a product ejector, a sprue ejector, a time-delay ejector and an ejector plate, wherein the product ejector, the sprue ejector and the time-delay ejector are installed on the ejector plate, and the ejector plate drives the product ejector, the sprue ejector and the time-delay ejector to move, the product ejector acts on the product in the mold core, the sprue ejector acts on the sprue material and separates the sprue material from the product, the sprue ejector abuts against the time-delay ejector, a cavity is provided in the ejector plate, the time-delay ejector is movably arranged in the cavity, the height of the cavity is a preset height H, the ejector plate drives the product ejector to move the preset height H and then pushes the time-delay ejector, and the time-delay ejector drives the sprue ejector to move.
2. The mold structure of the automatic water shut-off according to claim 1, characterized in that: A limiting portion is formed at the connection between the nozzle ejector pin and the delay ejector pin, and the limiting portion can be movably arranged in the cavity.
3. The mold structure of the automatic water shut-off according to claim 2, characterized in that: The ejector plate includes a first ejector plate and a second ejector plate connected to each other, the first ejector plate is located on a side of the second ejector plate away from the mold core, one end of the product ejector is connected to the second ejector plate, the cavity includes a first half cavity and a second half cavity connected to each other, the first half cavity is provided on the second ejector plate, and the second half cavity is provided on the first ejector plate.
4. The mold structure of the automatic water shut-off according to claim 1, characterized in that: The mold core has a sprue and a cold material hole arranged in the sprue, the cold material hole has an undercut groove, and one end of the sprue ejector away from the delay ejector is movably connected to the sprue.
5. The mold structure of the automatic water shut-off according to claim 3, characterized in that: A first connection part is provided on the side of the nozzle ejector close to the delay ejector, and a second connection part is provided on the side of the delay ejector close to the nozzle ejector. The first connection part is connected to the second connection part, and the second connection part is movably provided in the second half cavity. The first connection part is movably provided in the cavity.
6. The mold structure of the automatic water shut-off according to claim 5, characterized in that: The first half cavity includes a first limiting section and a first through hole that are interconnected, and the outer diameter of the first limiting section is larger than the outer diameter of the first connecting part; and / or the second half cavity includes a second limiting section and a second through hole that are interconnected, and the outer diameter of the second limiting section is larger than the outer diameter of the second connecting part.
7. The mold structure of the automatic water shut-off according to any one of claims 1 to 6, characterized in that: The mold structure of the automatic water shut-off also includes a bottom plate, which is located on a side of the ejector plate away from the mold core, and has a through hole for installing a machine ejector rod.
8. The mold structure of the automatic water shut-off according to claim 7, characterized in that: The mold structure of the automatic water shut-off further includes a pad, which is located between the mold core and the ejector plate. The product ejector passes through the pad and is inserted into the mold core. The water outlet ejector passes through the pad and is inserted into the mold core.
9. The mold structure of the automatic water shut-off according to claim 8, characterized in that: The mold structure of the automatic water shut-off further comprises a middle trunk, one end of which is connected to the bottom plate, and the other end of which passes through the ejector plate and is inserted into the pad plate, and the ejector plate can slide along the extension direction of the middle trunk.
10. A mold, characterized in that: A mold structure comprising an automatic water shut-off port as described in any one of claims 1 to 9.