A mold structure for zero degree mold release

Abstract

The utility model discloses a die structure of zero degree ejection, including front mould and back mould, the front mould includes: panel, the panel is embedded with bottom die, be provided with a plurality of convex push table on the bottom die, through setting up a plurality of independent extrusion insert combination formed conical extrusion body of the front mould, through setting up a plurality of independent extrusion insert combination formed conical extrusion body of the front mould, utilize conical extrusion body cooperation conical cavity to carry out extrusion operation to the front mould kernel, and the front mould kernel is in compression state, when the die opens, and the conical extrusion body releases the extrusion of the front mould kernel, and the front mould kernel steel resets, and its inner wall separates from the outer wall of the shaped product, effectively prevent the shaped product from being pulled or dragged in demolding and the outer wall is hurt.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic molds, specifically a mold structure with zero-degree ejection. Background Technology

[0002] Plastic molds are a type of composite mold used in compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding. The coordinated changes in the mold's punch, die, and auxiliary molding systems allow for the production of a series of plastic parts of different shapes and sizes. They mainly include a die with a variable cavity, consisting of a die assembly base plate, die components, and die assembly clamping plates; and a punch with a variable core, consisting of a punch assembly base plate, punch components, punch assembly clamping plates, cavity cut-off components, and side cut-off plates.

[0003] However, with traditional plastic products, the mold can easily scratch the surface of the molded product during demolding, which affects the appearance of the molded product and fails to meet the product's appearance requirements. Utility Model Content

[0004] The purpose of this invention is to provide a mold structure with zero-degree demolding, so as to solve the problem mentioned in the background art that the mold is easy to scratch the surface of the molded product.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mold structure for zero-degree ejection includes a front mold and a rear mold, wherein the front mold and the rear mold are connected in an opening and closing manner, characterized in that the front mold includes:

[0007] A panel, on which a bottom mold is embedded, and on which a plurality of protruding push platforms are provided;

[0008] Plate A, with elastic bodies provided at the four corners where the plate A contacts the panel, the elastic bodies protruding from the plate A, so that a pre-compression gap is formed between the panel and the plate A, and a conical cavity is provided on the plate A;

[0009] A conical extrusion body is formed by combining several independent extrusion inserts. The conical extrusion body is located below several pushers. Each pusher corresponds to one of the extrusion inserts. The conical extrusion body has an extrusion cavity in the middle and slides back and forth in the conical cavity.

[0010] The front mold core is located inside the extrusion cavity. When the mold performs the mold closing action, the pusher on the bottom mold pushes the conical extrusion body forward horizontally to form a clamping and extrusion on the front mold core, and the front mold core is in a contracted state. When the mold opens, the conical extrusion body slides backward horizontally to release the extrusion on the front mold core, and the inner wall of the front mold core separates from the outer wall of the molded product.

[0011] In one embodiment, clearance grooves are provided at the four corners of the panel, and the elastic body is provided in a one-to-one correspondence with the clearance groove. A protruding post is provided behind the elastic body. The length of the elastic body and the protruding post is greater than the depth of the clearance groove. The top of the elastic body abuts against the bottom of the clearance groove to form an elastic support effect for the panel.

[0012] In one embodiment, the elastomer is configured as an elastic rubber or a spring, and the width of the preload gap is at least 0.1 cm.

[0013] In one embodiment, the conical cavity is horizontally disposed on the A plate, and the front end width of the conical cavity is smaller than the rear end width, forming an effect where the lower part of the cavity is inclined backward in the horizontal direction. When the mold opens, the conical extrusion body moves backward along the inclined surface below the conical cavity, releasing the clamping and extrusion on the front mold core.

[0014] In one embodiment, the rear mold includes a B plate, a base, and a square iron disposed between the B plate and the base, wherein the B plate is located at the front end of the square iron and the base is located at the rear end of the square iron.

[0015] In one embodiment, a sliding groove is provided on the B plate, and a mold core is provided at the center of the sliding groove. The mold core extends forward into the front mold core and forms a closed product forming cavity, which is the mold closing state.

[0016] In one embodiment, a matching push plate is fitted on the mold core. The push plate is movable back and forth and connected to the mold core. When the mold performs the mold closing action, the push plate is hidden in the sliding groove and the push plate is flush with the opening of the sliding groove. When the mold opens, the push plate moves forward to push the molded product to perform the demolding action.

[0017] In one embodiment, the mold core includes a rear mold core and a plurality of control extrusion pieces and extrusion pieces disposed inside the rear mold core. The extrusion pieces are fixedly connected to the B plate. The plurality of control extrusion pieces are combined to form a tubular structure. The control extrusion pieces are sleeved on the extrusion pieces. There is a gap between the bottom of the rear mold core and the bottom of the sliding groove. The extrusion pieces are provided with a plurality of annular extrusion platforms. The annular extrusion platforms are outwardly extending conical structures. The inner wall of the control extrusion pieces is provided with extrusion grooves that are tangent to the annular extrusion platforms. The height of the extrusion pieces is less than the height of the internal cavity of the rear mold core.

[0018] When the mold is closed, the rear mold core and several control extrusion pieces move backward. The extrusion groove on the inner wall of the control extrusion piece slides along the annular extrusion table, forming a support and expansion state for the several control extrusion pieces. At the same time, the extrusion pieces expand and control the rear mold core.

[0019] When the mold opens, the rigid shrinkage force of the rear mold core pushes the extruder forward to reset, and the outer wall of the rear mold core detaches from the inner wall of the molded product.

[0020] In one embodiment, a pressure plate and a support column are slidably disposed behind the push plate. One end of the support column is connected to the pressure plate, and the other end of the support column passes through plate B and is connected to the push plate. A hydraulic cylinder is connected to the bottom of the pressure plate. When the mold performs mold closing or mold opening actions, the hydraulic cylinder drives the pressure plate to move back and forth.

[0021] In one embodiment, a push rod slide is provided on the mold core along the length direction of the mold core, and a push rod is provided in the push rod slide. The push rod is used to assist in demolding the molded product.

[0022] The ejector slide passes through the rear mold core, the extrusion part, and the B plate. The rear end of the ejector rod passes through the ejector slide and is connected to the pressure plate. When the mold performs the mold opening and closing actions, the pressure plate moves the ejector rod backward in conjunction with the ejector rod, and the ejector rod slides until it is flush with the front opening of the ejector slide.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. The above-mentioned zero-degree demolding mold structure uses a conical extrusion body formed by combining several independent extrusion inserts in the front mold. The conical extrusion body, in conjunction with the conical cavity, extrudes the front mold core. The front mold core is in a compressed state. When the mold opens, the conical extrusion body releases the pressure on the front mold core, and the front mold core rigidly returns to its original position. Its inner wall separates from the outer wall of the molded product, effectively preventing the molded product from being pulled or dragged on the outer wall during demolding.

[0025] 2. Several control extrusion parts and extrusion parts are set on the rear mold. The extrusion parts are equipped with several annular extrusion platforms, and the control extrusion parts are equipped with extrusion grooves that are tangent to the annular extrusion platforms. The annular extrusion platforms are conical structures. When the mold is closed, the control extrusion parts move, and the extrusion grooves slide a certain distance along the annular extrusion platforms to form an expansion support state for several control extrusion parts. At the same time, the control extrusion parts form an outward expansion control for the rear mold core. When the mold is opened, the rear mold moves away from the front mold, and the rear mold core and several control extrusion parts rigidly shrink and reset. Under the reset force, they slide forward to the initial position. At this time, the outer wall of the rear mold core separates from the inner wall of the molded product to prevent damage to the inner wall of the molded product during demolding. Attached Figure Description

[0026] Figure 1 This is a schematic cross-sectional view of a mold structure for zero-degree demolding according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the bottom mold, front mold core, conical extrusion body, and mold core structure of a zero-degree demolding mold structure according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of a conical extrusion body structure for a zero-degree demolding mold structure according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the internal structure of plate A in a mold structure for zero-degree demolding according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the panel structure in a mold structure for zero-degree demolding according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the mold core and conical cavity of a mold structure for zero-degree demolding according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the mold closing state of the front mold and the rear mold in a mold structure for zero-degree demolding according to an embodiment of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of a zero-degree ejection mold structure, specifically a control type extruder and an extruder, according to an embodiment of this utility model. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0035] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediary component present. Conversely, when a component is said to be "directly" connected to another component, there is no intermediary component.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example 1

[0038] Please see Figures 1-8 A zero-degree ejection mold structure includes a front mold 100 and a rear mold 200, which are connected by an opening mechanism. The front mold 100 is a fixed mold, and the rear mold 200 is a movable mold. The front mold 100 includes: a panel 1, on which a bottom mold 11 is embedded, the bottom mold 11 being located on the bottom surface of the panel 1, and a plurality of protruding pushers 12 on the bottom mold 11; a feed inlet 300 on the panel 1 for the entry of raw materials, the feed inlet 300 being connected to a product forming cavity 9; and an A plate 2, with springs at the four corners of the A plate 2 in contact with the panel 1. The elastic body 3 protrudes from the A plate 2, forming a pre-compression gap 10 between the panel 1 and the A plate 2. The A plate 2 has a conical cavity 21. A conical extrusion body 4 is formed by combining several independent extrusion inserts 3. The conical extrusion body 4 is arranged opposite to several pushers 12. In this embodiment, there are six extrusion inserts 3, which combine to form the conical extrusion body 4. The height of the conical extrusion body 4 is less than that of the conical cavity 21. When the mold opens and closes, the conical extrusion body 4 moves back and forth within the conical cavity 21. The pushers 12 and the extrusion inserts 3 The conical extrusion body 4 has an extrusion cavity 41 in the middle. When the conical cavity 21 moves towards the panel 1, the six extrusion inserts 3 separate outwards, and the diameter of the conical cavity 21 increases. When the conical cavity 21 moves towards the A plate 2, the six extrusion inserts 3 close inwards, and the diameter of the conical cavity 21 decreases. The conical extrusion body 4 slides back and forth within the conical cavity 21. The front mold core 5 is made of steel material with a designed thickness and extrusion reset effect. The front mold core 5 is located within the extrusion cavity 41. When the mold performs the mold closing action, the rear mold 200 moves towards... The front mold 100 moves in the direction of compression and is squeezed. The elastic body 3 between the panel 1 and the A plate 2 is compressed and deformed, the pre-compression gap 10 is reduced, and the pusher 12 on the bottom mold 11 pushes the conical extrusion body 4 forward horizontally. The conical extrusion body 4 slides to the bottom of the conical cavity 21, forming a squeezing and clamping effect on the front mold core 5. At this time, the front mold core 5 is in a squeezed and contracted state. When the mold opens, the elastic body 3 resets, the pre-compression gap 10 is reset to its initial value, and the conical extrusion body 4 slides backward horizontally to release the squeezing of the front mold core 5, so as to demold the molded product.

[0039] Please see Figures 1-6The panel 1 has four corner relief grooves 13, and elastic bodies 3 are correspondingly arranged in the relief grooves 13. The elastic bodies 3 are located in the relief grooves 13, and protruding posts are provided below the elastic bodies 3. The height of both is greater than the depth of the relief grooves 13, forming an elastic support effect for the panel 1. The elastic bodies 3 are made of elastic rubber or springs. In this embodiment, the elastic bodies 3 are made of elastic rubber. The width of the pre-compression gap 10 is at least 0.1 cm. In this embodiment, the width of the pre-compression gap 10 is set to 0.5 cm. When the pusher 12 on the bottom mold 11 pushes the conical extrusion body 4 forward horizontally, the conical extrusion body 4 slides to the bottom of the conical cavity 21 with a maximum stroke of 0.5 cm. The conical cavity 21 is horizontally arranged on the A plate 2. The front width of the conical cavity 21 is smaller than the rear width, forming an effect of tilting backward along the horizontal direction below the cavity. When the mold opens, the conical extrusion body 4 moves backward along the inclined surface below the conical cavity 21, releasing the clamping and extrusion on the front mold core 5, and the front mold core 5 is rigidly reset.

[0040] In this way, by setting a conical extrusion body 4 formed by a combination of several independent extrusion inserts 3 in the front mold 100, the conical extrusion body 4 and the conical cavity 21 are used to extrude the front mold core 5. At this time, the front mold core 5 is in a compressed state. When the mold is opened, the conical extrusion body 4 releases the extrusion on the front mold core 5, and the front mold core 5 is rigidly reset. Its inner wall separates from the outer wall of the molded product, effectively preventing the molded product from being pulled or dragged on the outer wall during demolding.

[0041] Example 2

[0042] Please see Figure 1 , Figure 6-7A zero-degree ejection mold structure, the rear mold 200 includes a B plate 6, a base 7, and two square iron blocks 8 disposed between the B plate 6 and the base 7. The two square iron blocks 8 are respectively disposed on opposite sides between the B plate 6 and the base 7, forming a separation support for the B plate 6 and the base 7, and also forming a clearance area between the B plate 6 and the base 7. Multiple positioning rods are disposed within the clearance area, with both ends of the positioning rods fixedly connected to the B plate 6 and the base 7 respectively. The B plate 6 is located at the front end of the square iron blocks 8, and the base 7 is located at the rear end of the square iron blocks 8. A sliding mechanism is provided on the B plate 6. The center of the sliding groove 61 is provided with a mold core 62, which extends forward into the front mold core 5 and forms a closed product forming cavity 9, which is the mold-closed state. A matching push plate 63 is fitted on the mold core 62. The push plate 63 is movable back and forth and connected to the mold core 62. When the mold performs the mold-closing action, the push plate 63 is hidden in the sliding groove 61 and the push plate 63 is flush with the opening of the sliding groove 61. When the mold performs the mold-opening action, the push plate 63 moves forward to push the formed product on the mold core 62 to perform the demolding action. The mold core 62 includes a rear mold core 30 and a mold core 62. The rear mold core 30 contains several control-type extrusion pieces 40 and 50. Extrusion pieces 50 are fixedly connected to the B plate 6 and located in the middle of the sliding groove. The rear mold core 30 is a tubular structure closed at one end. The control-type extrusion pieces 40 and 50 are all located inside the rear mold core 30. The rear mold core 30 can move back and forth along the sliding groove 61. The control-type extrusion pieces 40 are separable and can be combined to form a tubular structure. The control-type extrusion pieces 40 are sleeved on the extrusion pieces 50 and can move back and forth. The bottom of the rear mold core 30 is flush with the bottom of the sliding groove 61. There is a gap, which is the distance that the rear mold core 30 moves back and forth. When the rear mold core 30 moves backward, several control extrusion parts 40 move backward simultaneously. This is the mold closing state. Several annular extrusion platforms 501 are provided on the extrusion parts 50. The annular extrusion platform 501 is an outwardly extending inclined conical structure. The front diameter of the annular extrusion platform 501 is smaller than the rear diameter. The control extrusion parts 40 are provided with extrusion grooves 401 that are tangent to the annular extrusion platforms 501. The extrusion grooves 401 are also conical grooves. The height of the extrusion parts 50 is smaller than the height of the internal cavity of the rear mold core 30.

[0043] When the mold is closed, the rear mold core 30 moves backward under force, and at the same time, several control extrusion parts 40 move backward in conjunction. When the control extrusion parts 40 move apart, they are separated, forming an outward extrusion and expansion of the extrusion parts 40. At the same time, the extrusion parts 40 expand and control the rear mold core 30. The rear mold core 30 is made of steel material with designed thickness and rigidity.

[0044] Please see Figure 1 and Figure 6-7A pressure plate 65 and a support column 66 are slidably arranged behind the push plate 63. One end of the support column 66 is connected to the pressure plate 65, and the other end of the support column 66 passes through plate B 6 and is connected to the push plate 63. A hydraulic cylinder is provided at the bottom of the pressure plate 65. The telescopic ejector rod of the hydraulic cylinder is fixedly connected to the pressure plate 65. When the mold performs mold closing or mold opening actions, the telescopic ejector rod of the hydraulic cylinder moves back and forth, driving the pressure plate 65 to move back and forth. An ejector rod slide 621 is provided on the mold core 62 along the length direction of the mold core 62. An ejector pin 64 is provided inside 621. The ejector pin 64 is used to assist in demolding the molded product. The ejector pin slide 621 passes through the rear mold core 30, the mold core 62 and the B plate 6. The rear end of the ejector pin 64 passes through the ejector pin slide 621 and is connected to the pressure plate 65. When the mold performs the mold closing action, the pressure plate 65 moves backward in conjunction with the ejector pin 64. The ejector pin 64 slides until it is flush with the front opening of the ejector pin slide 621. The pressure plate 65 moves back and forth along the positioning rod in the clearance area. The clearance area is the space for the pressure plate 65 to move to prevent the pressure plate 65 from shaking.

[0045] Thus, a zero-degree demolding mold structure is achieved by setting several control extrusion pieces 40 and extrusion pieces 50 on the rear mold 200. The extrusion pieces 50 are provided with several annular extrusion platforms 501, and the control extrusion pieces 40 are provided with extrusion grooves 401 that are tangential to the annular extrusion platforms 501. The annular extrusion platforms 501 are conical structures. When the mold is closed, the control extrusion pieces 40 move, and the extrusion grooves 401 slide a certain distance along the annular extrusion platforms 501, forming an expansion support state for the several control extrusion pieces 40. At the same time, the control extrusion pieces 40 form an outward expansion control for the rear mold core 30. When the mold is opened, the rear mold 200 moves away from the front mold 100, and the rear mold core 30 and the several control extrusion pieces 40 rigidly shrink and reset. Under the reset force, they slide forward to the initial position. At this time, the outer wall of the rear mold core 30 detaches from the inner wall of the molded product to prevent damage to the inner wall of the molded product during demolding.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mold structure for zero-degree demolding, comprising a front mold and a rear mold, characterized in that, The front mold includes: A panel, on which a bottom mold is embedded, and on which a plurality of protruding push platforms are provided; Plate A, with elastic bodies provided at the four corners where the plate A contacts the panel, the elastic bodies protruding from the plate A, so that a pre-compression gap is formed between the panel and the plate A, and a conical cavity is provided on the plate A; A conical extrusion body is formed by combining several independent extrusion inserts. The conical extrusion body is located below several pushers. Each pusher corresponds to one of the extrusion inserts. The conical extrusion body has an extrusion cavity in the middle and slides back and forth in the conical cavity. The front mold core is located inside the extrusion cavity. When the mold performs the mold closing action, the pusher on the bottom mold pushes the conical extrusion body forward horizontally to form a clamping and extrusion on the front mold core, and the front mold core is in a contracted state. When the mold opens, the conical extrusion body slides backward horizontally to release the extrusion on the front mold core, and the inner wall of the front mold core separates from the outer wall of the molded product.

2. The mold structure for zero-degree demolding according to claim 1, characterized in that, The panel has clearance grooves at its four corners, and the elastic body is provided in a one-to-one correspondence with the clearance groove. A protruding post is provided behind the elastic body. The length of the elastic body and the protruding post is greater than the depth of the clearance groove. The top of the elastic body abuts against the bottom of the clearance groove to form an elastic support effect for the panel.

3. The mold structure for zero-degree demolding according to claim 1, characterized in that, The elastomer is configured as an elastic rubber or a spring, and the width of the pre-compression gap is at least 0.1 cm.

4. The mold structure for zero-degree demolding according to claim 1, characterized in that, The conical cavity is horizontally positioned on plate A. The front end of the conical cavity is narrower than the rear end, creating an effect where the lower part of the cavity slopes backward in the horizontal direction. When the mold opens, the conical extrusion body moves backward along the inclined surface below the conical cavity, releasing the clamping and extrusion on the front mold core.

5. The mold structure for zero-degree demolding according to claim 1, characterized in that, The rear mold includes a B plate, a base, and a square iron plate disposed between the B plate and the base. The B plate is located at the front end of the square iron plate, and the base is located at the rear end of the square iron plate.

6. The mold structure for zero-degree demolding according to claim 5, characterized in that, The B plate has a sliding groove, and a mold core is set in the center of the sliding groove. The mold core extends forward into the front mold core and forms a closed product forming cavity, which is the mold closing state.

7. The mold structure for zero-degree demolding according to claim 6, characterized in that, The mold core is fitted with a matching push plate, which can be moved back and forth and connected to the mold core. When the mold performs the mold closing action, the push plate is hidden in the sliding groove and the push plate is flush with the opening of the sliding groove. When the mold opens, the push plate moves forward to push the molded product to perform the demolding action.

8. The mold structure for zero-degree demolding according to claim 7, characterized in that, The mold core includes a rear mold core and several control extrusion pieces and extrusion pieces disposed inside the rear mold core. The extrusion pieces are fixedly connected to the B plate. The several control extrusion pieces are combined to form a tubular structure. The control extrusion pieces are sleeved on the extrusion pieces. There is a gap between the bottom of the rear mold core and the bottom of the sliding groove. Several annular extrusion platforms are provided on the extrusion pieces. The annular extrusion platforms are conical structures extending outward. The inner wall of the control extrusion pieces is provided with extrusion grooves that are tangent to the annular extrusion platforms. The height of the extrusion pieces is less than the height of the internal cavity of the rear mold core. When the mold is closed, the rear mold core and several control extrusion pieces move backward. The extrusion groove on the inner wall of the control extrusion piece slides along the annular extrusion table, forming a support and expansion state for the several control extrusion pieces. At the same time, the extrusion pieces expand and control the rear mold core. When the mold opens, the rigid shrinkage force of the rear mold core pushes the extruder forward to reset, and the outer wall of the rear mold core detaches from the inner wall of the molded product.

9. The mold structure for zero-degree demolding according to claim 8, characterized in that, A pressure plate and a support column are slidably arranged behind the push plate. One end of the support column is connected to the pressure plate, and the other end of the support column passes through plate B and is connected to the push plate. A hydraulic cylinder is connected to the bottom of the pressure plate. When the mold performs mold closing or mold opening actions, the hydraulic cylinder drives the pressure plate to move back and forth.

10. The mold structure for zero-degree demolding according to claim 9, characterized in that, The mold core is provided with a push rod slide along the length direction of the mold core, and a push rod is provided in the push rod slide. The push rod is used to assist in demolding the molded product. The ejector slide passes through the rear mold core, the extrusion part, and the B plate. The rear end of the ejector rod passes through the ejector slide and is connected to the pressure plate. When the mold performs the mold opening and closing actions, the pressure plate moves the ejector rod backward in conjunction with the ejector rod, and the ejector rod slides until it is flush with the front opening of the ejector slide.

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