Injection mold

Abstract

An injection mold comprises a fixing plate, a fixing block, a bearing plate and a male mold plate which are sequentially arranged from bottom to top, and further comprises an ejector plate arranged between the fixing plate and the bearing plate and used for pushing the male mold plate to move and a mold core arranged on the male mold plate. The injection mold further comprises a first induction mechanism connected with the bearing plate and the male mold plate, and a second induction mechanism connected with the ejector plate and the male mold plate. And the operation state of the injection mold is monitored through the first induction mechanism and / or the second induction mechanism. According to the injection mold disclosed by the utility model, interference on mold pressing caused by the fact that the ejector pin is not reset in place can be effectively avoided, so that the risk of damage to the injection mold is reduced.

Description

Technical Field

[0001] The utility model relates to the field of mold manufacturing, in particular to an injection mold. Background Art

[0002] Injection molds are widely used in the industrial field, such as molding plastic products through injection molds, or molding plastic products with metal inserts. With the development and demand of injection molds, undercut structures are increasingly used in products, so soft plastic injection molds with undercut structures have emerged to meet production needs.

[0003] However, in actual production, the existing injection molds with undercut structures often fail to reset the undercut structures before closing the mold, which results in mold interference in the injection mold. This ultimately requires a lot of money and time to repair the injection mold. Repeated repairs of the injection mold will lead to premature scrapping of the injection mold. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an injection mold which can effectively avoid interference with the mold due to the ejector pin not being reset in place.

[0005] The utility model provides an injection mold, comprising a fixed plate, a fixed block, a bearing plate and a male mold plate which are sequentially arranged from bottom to top, the injection mold further comprising an ejector plate arranged between the fixed plate and the bearing plate for pushing the male mold plate to move, and a mold core arranged on the male mold plate, an inclined ejector mechanism and an undercut mechanism are installed on the mold core, the inclined ejector mechanism is arranged in linkage with the male mold plate and the ejector plate, the undercut mechanism is arranged in linkage with the bearing plate and the male mold plate, the injection mold further comprises a first sensing mechanism connecting the bearing plate and the male mold plate and a second sensing mechanism connecting the ejector plate and the male mold plate, the operation state of the injection mold is monitored by the first sensing mechanism and / or the second sensing mechanism,

[0006] The injection mold includes a mold closing state and a mold opening state. When the injection mold is in the mold closing state, the second sensing mechanism is triggered and the first sensing mechanism is not triggered, the inclined ejector mechanism is retracted inwardly, and the undercut mechanism extends outwardly from the mold core. When the injection mold changes from the mold closing state to the mold opening state, the male mold plate and the ejector plate move upward by a first distance, the ejector plate pushes the inclined ejector mechanism to open outwardly, and the carrier plate pulls the undercut mechanism to retract inwardly. The first sensing mechanism is triggered, the male mold plate stops moving, and the ejector plate moves upward by a second distance. The first sensing mechanism remains triggered, and the second sensing mechanism is disconnected from the trigger, and the injection mold ejects the product. When the injection mold changes from the mold opening state to the mold closing state, the ejector plate moves downward by a second distance, the ejector plate pulls the inclined ejector mechanism to retract inwardly, and the carrier plate pushes the undercut mechanism to extend outwardly. When the second sensing mechanism is triggered, the ejector plate and the male mold plate move downward by a first distance, and the first sensing mechanism is disconnected from the trigger, and the injection mold enters the mold closing state.

[0007] Furthermore, the first sensing mechanism includes a first sensing block and a first sensing switch, and the first sensing block and the first sensing switch are correspondingly arranged on the carrying plate and the male plate.

[0008] Furthermore, the second sensing mechanism includes a second sensing block and a second sensing switch, and the second sensing block and the second sensing switch are correspondingly arranged on the ejector plate and the male plate.

[0009] Furthermore, the injection mold further comprises an ejector pin, and two ends of at least one of the ejector pins are respectively fixedly connected to the ejector pin plate and the second sensing block.

[0010] Furthermore, the injection mold further comprises a spring, the spring is sleeved on the periphery of the ejector pin, and two ends of the spring respectively abut against the ejector pin plate and the second sensing block.

[0011] Furthermore, the injection mold further comprises a rotating shaft, the tilting lift mechanism comprises a tilting top and a tilting lift rod connected to the tilting top, the tilting top is arranged on the mold core, and the tilting lift rod is rotatably connected to the rotating shaft.

[0012] Furthermore, a guide block is installed on the male mold plate, and an inclined guide hole is opened on the guide block. The inclined lift rod passes through the inclined guide hole and is rotatably connected to the rotating shaft. When the guide block moves upward, the inclined lift mechanism rotates outward around the rotating shaft and moves away from the mold core; when the guide block moves downward, the inclined lift mechanism rotates inward around the rotating shaft and moves toward the mold core.

[0013] Furthermore, the undercut mechanism includes a fixed part and a movable part, the fixed part is convexly provided with an inclined guide block, the movable part is concavely provided with an inclined guide groove corresponding to the inclined guide block, the inclined guide block cooperates with the inclined guide groove to enable the movable part to slide along the fixed part in the first direction.

[0014] Furthermore, the movable part is located at one end of the fixed part, the other end of the fixed part is fixedly connected to the supporting plate, and the movable part is movably arranged on the mold core.

[0015] Furthermore, a movable groove is provided on the mold core, and the movable member slides along the movable groove in the second direction.

[0016] The injection mold provided by the utility model can effectively avoid interference molding caused by the ejector pin not being reset in place, thereby reducing the risk of damage to the injection mold and greatly saving the maintenance cost of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The utility model is a stereoscopic diagram of an injection mold in a mold closing state.

[0019] Figure 2 for Figure 1 A three-dimensional view of the injection mold in a mold closing state from another angle is shown.

[0020] Figure 3 The utility model is a stereoscopic diagram of an injection mold in a mold opening state.

[0021] Figure 4 for Figure 3 A three-dimensional view of an injection mold in an open mold state from another angle is shown.

[0022] Figure 5 It is a three-dimensional diagram of a partial structure of an injection mold of the utility model.

[0023] Figure 6 It is a schematic diagram of a tilting ejector mechanism of an injection mold of the utility model.

[0024] Figure 7 It is a three-dimensional diagram of the undercut mechanism of the utility model. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0027] The terms "first", "second", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0028] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0029] Please refer to Figures 1 to 4 The utility model provides an injection mold, comprising a fixed plate 11, a fixed block 12, a bearing plate 13 and a male plate 14 arranged in sequence from bottom to top. The injection mold also includes a pin plate 16 arranged between the fixed plate 11 and the bearing plate 13 for pushing the male plate 14 to move, and a mold core 15 arranged on the male plate 14. A tilting ejection mechanism 151 and an undercut mechanism 152 are installed on the mold core 15. The tilting ejection mechanism 151 is arranged in linkage with the male plate 14 and the pin plate 16. The undercut mechanism 152 is arranged in linkage with the bearing plate 13 and the male plate 14. The injection mold also includes a first sensing mechanism 20 connecting the bearing plate 13 and the male plate 14 and a second sensing mechanism 30 connecting the pin plate 16 and the male plate 14, and the operation status of the injection mold is monitored by the first sensing mechanism 20 and / or the second sensing mechanism 30.

[0030] More specifically, the injection mold includes a mold closing state and a mold opening state. When the injection mold is in the mold closing state, the second sensing mechanism 30 is triggered and the first sensing mechanism is not triggered, the inclined ejector mechanism 151 is retracted inwardly, and the undercut mechanism 152 extends outwardly from the mold core 15; when the injection mold changes from the mold closing state to the mold opening state, the male mold plate 14 and the ejector plate 16 move upward by a first distance. At this time, the ejector plate 16 pushes the inclined ejector mechanism 151 to open outwardly, and the carrier plate 13 pulls the undercut mechanism 152 to retract inwardly. When the first sensing mechanism 20 is triggered, the male mold plate 14 The movement stops, and the ejector plate 16 continues to move upward by a second distance, the first sensing mechanism 20 remains triggered, the second sensing mechanism 30 is disconnected from the trigger, and the injection mold ejects the product; when the injection mold changes from the open mold state to the closed mold state, the ejector plate 16 moves downward by a second distance, the ejector plate 16 pulls the inclined ejection mechanism 151 inwardly, and the carrier plate 13 pushes the undercut mechanism 152 outwardly, and when the second sensing mechanism 30 is triggered, the ejector plate 16 and the male mold plate 14 move downward by a first distance, the first sensing mechanism 20 is disconnected from the trigger, and the injection mold enters the closed mold state.

[0031] In this embodiment, more specifically, the first distance is 20 mm, and the second distance is 60 mm. The male mold plate 14 and the ejector plate 16 move upward or downward by the first distance, firstly, to retract the undercut mechanism 152 to prevent the product from being stuck by the undercut mechanism 152 when being ejected and unable to be ejected; secondly, to open the inclined ejection mechanism 151 outward to separate the product from the mold core 15 to ensure that the product and the mold core 15 will not stick together, so as to smoothly remove the product.

[0032] Please continue reading Figures 1 to 4 , the first sensing mechanism 20 includes a first sensing block 22 and a first sensing switch 21. The first sensing block 22 and the first sensing switch 21 are correspondingly arranged on the carrier plate 13 and the male plate 14. In this embodiment, the first sensing block 22 is mounted on the carrier plate 13, and the first sensing switch 21 is mounted on the male plate 14. In other embodiments, the first sensing block 22 may also be mounted on the male plate 14, and correspondingly, the first sensing switch 21 is mounted on the carrier plate 13, which is not particularly limited herein.

[0033] The second sensing mechanism 30 includes a second sensing block 32 and a second sensing switch 31. The second sensing block 32 and the second sensing switch 31 are correspondingly arranged on the ejector plate 16 and the male plate 14. In this embodiment, the second sensing block 32 is mounted on the ejector plate 16, and the second sensing switch 31 is mounted on the male plate 14. In other embodiments, the second sensing block 32 is mounted on the male plate 14, and correspondingly, the second sensing switch 31 is mounted on the ejector plate 16, which is not particularly limited herein.

[0034] In more detail, the injection mold further includes a plurality of ejector pins 17 and springs 18. One end of the ejector pin 17 is fixedly connected to the ejector plate 16, and the other end of the ejector pin 17 is fixedly connected to the male mold plate 14 or the second sensing block 32. The spring 18 is sleeved around the ejector pin 17, and the two ends of the spring 18 are respectively pressed against the ejector plate 16 and the second sensing block 32. The carrier plate 13 is provided with avoidance holes corresponding to the ejector pin 17 and the spring 18, and the ejector pin 17 and the spring 18 are connected to the ejector plate 16 and the second sensing block 32 through the avoidance holes.

[0035] Furthermore, the male template 14 is provided with a mounting hole corresponding to the ejector pin 17, the second sensing block 32 is blocked at one end of the mounting hole away from the ejector plate 16, the ejector pin 17 passes through the mounting hole and is fixed on the second sensing block 32, and the two ends of the spring 18 are respectively pressed against the ejector plate 16 and the male template 14.

[0036] See also Figure 5 and Figure 6 , the injection mold further includes a rotating shaft 19. In this embodiment, the rotating shaft 19 is fixed to the fixed block 12 via a fixed shaft. The fixed shaft is perpendicular to the projection of the rotating shaft in the vertical direction. At least one end of each rotating shaft 19 is fixed to the fixed shaft. The inclined top mechanism 151 includes an inclined top and an inclined top rod connected to the inclined top. The inclined top is arranged on the mold core 15, and the end of the inclined top rod is rotatably connected to the rotating shaft 19.

[0037] Furthermore, a guide block 141 is also installed on the male mold plate 14. An inclined guide hole is provided on the guide block 141. The inclined ejector rod passes through the inclined guide hole and is rotatably connected to the rotating shaft 19. When the male mold plate 14 drives the guide block to move upward, the inclined ejector mechanism 151 rotates outward around the rotating shaft 19 and moves away from the mold core 15; when the male mold plate 14 drives the guide block 141 to move downward, the inclined ejector mechanism 151 rotates inward around the rotating shaft 19 and moves toward the mold core 15.

[0038] See also Figure 5 and Figure 7 The undercut mechanism 152 includes a fixed part 1521 and a movable part 1523. The movable part 1523 is located at one end of the fixed part 1521, and the other end of the fixed part 1521 is fixedly connected to the bearing plate 13, and the movable part 1523 is movably arranged on the mold core 15.

[0039] In this embodiment, an inclined guide block 1522 is convexly provided on the fixing member 1521. In other embodiments, the inclined guide block 1522 is detachably mounted on the fixing member 1521. An inclined guide groove 1524 is concavely provided on the movable member 1523 corresponding to the inclined guide block 1522. The inclined guide block 1522 cooperates with the inclined guide groove 1524 to enable the movable member 1523 to slide along the fixing member 1521 in a first direction. The mold core 15 is provided with a movable groove corresponding to the movable member 1523, and the movable member 1523 reciprocates along the movable groove in a second direction. In this embodiment, the first direction is a direction inclined from top to bottom in the vertical direction, and the second direction is a horizontal direction. Based on the first direction and the second direction, when the male template 14 moves upward relative to the supporting plate 13, the movable part 1523 moves upward and outward and protrudes out of the mold core 15; when the male template 14 moves downward relative to the supporting plate 13, the movable part 1523 moves downward and inward and retracts into the mold core 15.

[0040] The injection mold further comprises a female template, and the female template is provided with a mold groove corresponding to the mold core 15, the inclined lift mechanism 151 and the undercut mechanism 152. When the injection mold is closed, the female template is combined with the male template, the mold core 15, the inclined lift mechanism 151 and the undercut mechanism 152 are embedded in the mold groove, and the mold core 15, the inclined lift mechanism 151, the undercut mechanism 152 and the groove wall of the mold groove jointly enclose an injection space, and the molten plastic is injected into the injection space to form a product in the injection space.

[0041] The injection mold of the utility model can effectively avoid interference molding caused by the ejector pin not being reset into place by setting the first sensing mechanism 20 and the second sensing mechanism 30 to monitor the operating status of the injection mold, thereby reducing the risk of damage to the injection mold and greatly saving the maintenance cost of the injection mold.

[0042] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An injection mold, comprising a fixed plate, a fixed block, a bearing plate and a male mold plate arranged in sequence from bottom to top, the injection mold further comprising an ejector plate arranged between the fixed plate and the bearing plate for pushing the male mold plate to move, and a mold core arranged on the male mold plate, characterized in that: The mold core is equipped with an inclined ejector mechanism and an undercut mechanism, the inclined ejector mechanism is linked with the male mold plate and the ejector plate, the undercut mechanism is linked with the carrier plate and the male mold plate, the injection mold further comprises a first sensing mechanism connecting the carrier plate and the male mold plate and a second sensing mechanism connecting the ejector plate and the male mold plate, the operation state of the injection mold is monitored by the first sensing mechanism and / or the second sensing mechanism, The injection mold includes a mold closing state and a mold opening state. When the injection mold is in the mold closing state, the second sensing mechanism is triggered and the first sensing mechanism is not triggered, the inclined ejector mechanism is retracted inwardly, and the undercut mechanism extends outwardly from the mold core. When the injection mold changes from the mold closing state to the mold opening state, the male mold plate and the ejector plate move upward by a first distance, the ejector plate pushes the inclined ejector mechanism to open outwardly, and the carrier plate pulls the undercut mechanism to retract inwardly. The first sensing mechanism is triggered, the male mold plate stops moving, and the ejector plate moves upward by a second distance. The first sensing mechanism remains triggered, and the second sensing mechanism is disconnected from the trigger, and the injection mold ejects the product. When the injection mold changes from the mold opening state to the mold closing state, the ejector plate moves downward by a second distance, the ejector plate pulls the inclined ejector mechanism to retract inwardly, and the carrier plate pushes the undercut mechanism to extend outwardly. When the second sensing mechanism is triggered, the ejector plate and the male mold plate move downward by a first distance, and the first sensing mechanism is disconnected from the trigger, and the injection mold enters the mold closing state.

2. The injection mold according to claim 1, characterized in that: The first sensing mechanism includes a first sensing block and a first sensing switch, and the first sensing block and the first sensing switch are correspondingly arranged on the carrying plate and the male plate.

3. The injection mold according to claim 1, characterized in that: The second sensing mechanism includes a second sensing block and a second sensing switch, and the second sensing block and the second sensing switch are correspondingly arranged on the ejector plate and the male plate.

4. The injection mold according to claim 3, characterized in that: The injection mold further comprises an ejector pin, and two ends of at least one of the ejector pins are respectively fixedly connected to the ejector pin plate and the second sensing block.

5. The injection mold according to claim 4, characterized in that: The injection mold further comprises a spring, which is sleeved on the periphery of the ejector pin, and two ends of the spring respectively abut against the ejector pin plate and the second induction block.

6. The injection mold according to claim 1, characterized in that: The injection mold further comprises a rotating shaft, the tilting lift mechanism comprises a tilting top and a tilting lift rod connected to the tilting top, the tilting top is arranged on the mold core, and the tilting lift rod is rotatably connected to the rotating shaft.

7. The injection mold according to claim 6, characterized in that: A guide block is also installed on the male mold plate, and an inclined guide hole is opened on the guide block. The inclined ejector rod passes through the inclined guide hole and is rotatably connected to the rotating shaft. When the guide block moves upward, the inclined ejector mechanism rotates outward around the rotating shaft and moves away from the mold core; when the guide block moves downward, the inclined ejector mechanism rotates inward around the rotating shaft and moves toward the mold core.

8. The injection mold according to claim 1, characterized in that: The undercut mechanism includes a fixed part and a movable part, the fixed part is convexly provided with an inclined guide block, the movable part is concavely provided with an inclined guide groove corresponding to the inclined guide block, the inclined guide block cooperates with the inclined guide groove to enable the movable part to slide along the fixed part in a first direction.

9. The injection mold according to claim 8, characterized in that: The movable part is located at one end of the fixed part, and the other end of the fixed part is fixedly connected to the carrying plate. The movable part is movably arranged on the mold core.

10. The injection mold according to claim 9, characterized in that: The mold core is provided with a movable groove, and the movable member slides along the movable groove in the second direction.

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