Injection mold with automatic demolding function

Abstract

The utility model provides an automatic demolding injection mold, and relates to the technical field of injection molds. A mold groove is formed in the device shell, a lower mold is arranged in the mold groove, an ejection mechanism is arranged at the bottom of the lower mold, and an upper mold is arranged in the ejection plate; the inner side of the top plate is connected with an ejection mechanism, the ejection mechanism comprises a limiting shaft, the top of the limiting shaft is provided with an upper attaching pad, the middle of the limiting shaft is provided with a lower attaching pad, the bottom of the limiting shaft is provided with a fixing base, the inner side of the fixing base is provided with a connecting rod, the top of the connecting rod is provided with an ejection rod, and the top of the ejection rod is connected with the lower mold. When a workpiece is formed after injection molding is completed, the top plate can drive the upper mold to ascend, at the moment, the top plate can also push the upper attaching pad to ascend, so that the limiting shaft drives the ejector rod to ascend, the lower mold is driven by the ejector rod to ascend, attachment between the mold groove and the upper mold and the injection molding workpiece is broken, and the injection molding workpiece can be demolded in the first time; and the problem that the material of the injection molding workpiece is bonded with the mold cavity is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an automatic demolding injection mold. Background Technology

[0002] An automatic demolding injection mold is a type of mold that automatically ejects the molded plastic product from the mold during the injection molding process. Through various mechanisms and devices, it replaces traditional manual demolding methods, greatly improving production efficiency, product quality, and the degree of automation. However, existing automatic demolding injection molds have some shortcomings, such as:

[0003] Application No.: CN202320171987.8 describes an injection mold with automatic demolding. This equipment uses a dual-axis, large-area demolding rod to ensure linear demolding and prevent excessive pressure on a single point during demolding, which could cause product deformation. However, in actual use, the equipment requires external force to demold the injection molded workpiece, which may prevent immediate demolding. This could lead to prolonged contact between the workpiece and the mold, causing adhesion and resulting in demolding failure due to material adhesion.

[0004] Therefore, we propose an automatic demolding injection mold to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold with automatic demolding, so as to solve the problem mentioned in the background art that the current injection molds on the market are difficult to demold the workpiece in a timely manner.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection mold for automatic demolding, comprising a device shell and a top plate disposed on the top of the device shell, wherein the top of the device shell is provided with four sets of piston shafts, and the piston shafts are slidably connected to the top plate;

[0007] The device housing has a mold groove inside, and a lower mold is provided inside the mold groove. An ejection mechanism is provided at the bottom of the lower mold, and an upper mold is provided inside the top plate.

[0008] The inner side of the top plate is connected to the ejection mechanism, and the ejection mechanism includes a limiting shaft. The top of the limiting shaft is provided with an upper fitting pad, the middle of the limiting shaft is provided with a lower fitting pad, and the bottom of the limiting shaft is installed with a fixed seat. The inner side of the fixed seat is provided with a connecting rod, the top of the connecting rod is provided with an ejection rod, and the top of the ejection rod is connected to the lower mold.

[0009] By pressing down the upper mold with the top plate, the bottom of the top plate can be pressed against the lower bonding pad, which in turn causes the limiting shaft to lower the fixing seat and ejector rod, etc. The ejector rod then causes the lower mold to press against the bottom of the mold groove. Thus, the upper mold, mold groove, and lower mold form the injection cavity. When the workpiece is formed after injection molding, the top plate will cause the upper mold to rise. At this time, the top plate will also push the upper bonding pad to rise, which in turn causes the limiting shaft to rise, causing the lower mold to rise under the action of the ejector rod. This causes the mold groove and the upper mold to disconnect from the injection molded workpiece, allowing the injection molded workpiece to be demolded immediately and avoiding the problem of material sticking to the mold groove.

[0010] As a preferred technical solution of this utility model, the top plate is provided with injection holes and air pressure holes, and the bottom of the injection holes and air pressure holes are connected to the upper mold, and the air pressure holes are one-way air outlet valve structures.

[0011] The above technical solution enables the equipment to transfer materials through the injection hole, and to vent air through the air pressure hole when the air pressure inside the injection hole is too high, thereby increasing the stability of the equipment during injection molding.

[0012] As a preferred technical solution of this utility model, the upper mold and the lower mold are in the same vertical position, and the mold groove is provided with a mold cavity, and the mold groove is slidably fitted with the lower mold.

[0013] The above technical solution enables the lower mold to be more stable during lifting, thereby increasing the stability of the equipment during operation.

[0014] As a preferred technical solution of this utility model, a limiting groove is provided in the middle of the device shell, and the device shell is limited by the limiting groove and the mold groove. Furthermore, four sets of limiting sleeves are provided on the inner side of the top plate. The limiting sleeves are slidably connected to the limiting shaft, and the limiting sleeves are soft rubber sleeves that are fixedly connected to the top plate.

[0015] The above technical solution enables the top plate to be connected to the limiting shaft through the limiting sleeve when sliding, thereby making the limiting shaft more stable when sliding inside the top plate.

[0016] As a preferred technical solution of this utility model, the limiting sleeve drives the limiting shaft, connecting rod and ejector rod to rise and fall by pushing the upper and lower fitting pads, and the ejector rod passes through the bottom of the mold groove and is fixedly connected to the lower mold.

[0017] The above technical solution enables the top plate to be more stable when it drives the limit shaft and the ejector rod to rise and fall, thereby increasing the stability of the equipment during operation.

[0018] As a preferred technical solution of this utility model, the device housing is provided with a buffer damper, and the bottom of the limiting shaft is fixedly connected to the buffer damper through a fixed seat.

[0019] The above technical solution enables the device housing to be more stable when connected to the limiting shaft, thereby increasing the stability of the limiting shaft when it is raised or lowered.

[0020] As a preferred technical solution of this utility model, the top of the device housing is slidably connected to the limiting shaft, and the top of the device housing is fixedly connected to the piston shaft.

[0021] The above technical solution makes it easier to fix the position of the top plate by means of the piston shaft, thereby increasing the stability of the equipment during operation.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: by pressing down the upper mold through the top plate, the bottom of the top plate can be put into contact with the lower contact pad, which in turn causes the limiting shaft to drive the fixed seat and ejector rod to descend. The ejector rod then drives the lower mold to fit into the bottom of the mold groove, so that the upper mold, mold groove and lower mold form an injection groove. When the workpiece is formed after injection molding, the top plate will drive the upper mold to rise. At this time, the top plate will also push the upper contact pad to rise, which in turn causes the limiting shaft to drive the ejector rod to rise. The lower mold will rise under the action of the ejector rod, thereby breaking the mold groove and the upper mold from the injection molded workpiece. This allows the injection molded workpiece to be demolded immediately, avoiding the problem of material sticking to the mold groove of the injection molded workpiece.

[0023] Furthermore, by setting the limiting sleeve, the top plate can be connected to the limiting shaft through the limiting sleeve when sliding, so that the limiting shaft can be more stable when sliding inside the top plate.

[0024] Furthermore, by setting a buffer damping, the device housing can be made more stable when connected to the limit shaft, thereby increasing the stability of the limit shaft when it is raised or lowered. Attached Figure Description

[0025] Figure 1 This is a front view of the structure of this utility model;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the front cross-section of this utility model;

[0027] Figure 3 For the present utility model Figure 2 A magnified structural diagram at point A;

[0028] Figure 4 This is a three-dimensional structural diagram of the ejection mechanism of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the limiting shaft of this utility model.

[0030] In the diagram: 1. Device housing; 2. Piston shaft; 3. Top plate; 4. Upper mold; 5. Injection hole; 6. Air pressure hole; 7. Mold groove; 8. Mold cavity; 9. Lower mold; 10. Limiting shaft; 11. Limiting sleeve; 12. Upper bonding pad; 13. Lower bonding pad; 14. Fixed seat; 15. Buffer damping; 16. Connecting rod; 17. Ejector rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] To address the problem of immediate and automatic demolding of injection-molded workpieces in existing technologies, the following solution is disclosed. Please refer to [link / reference]. Figures 1-5 This utility model provides a technical solution: an injection mold with automatic demolding, including a device shell 1 and a top plate 3 disposed on the top of the device shell 1. The top of the device shell 1 is provided with four sets of piston shafts 2, and the piston shafts 2 are slidably connected to the top plate 3.

[0033] The device housing 1 has a mold groove 7 inside, and a lower mold 9 is provided inside the mold groove 7. The bottom of the lower mold 9 is provided with an ejection mechanism, and an upper mold 4 is provided inside the top plate 3.

[0034] The inner side of the top plate 3 is connected to the ejection mechanism, and the ejection mechanism includes a limiting shaft 10. The top of the limiting shaft 10 is provided with an upper fitting pad 12, the middle of the limiting shaft 10 is provided with a lower fitting pad 13, and the bottom of the limiting shaft 10 is provided with a fixed seat 14. The inner side of the fixed seat 14 is provided with a connecting rod 16, the top of the connecting rod 16 is provided with an ejection rod 17, and the top of the ejection rod 17 is connected to the lower mold 9.

[0035] When the top plate 3 is driven to rise and fall, it will also drive the upper mold 4 to rise and fall. After the upper mold 4 descends and fits against the top of the mold groove 7, the upper mold 4 and the lower mold 9 are located in the sealed mold cavity 8 formed by the top plate 3 and the mold groove 7. When the top plate 3 descends, it will also push the lower fitting pad 13 to descend, thereby causing the limiting shaft 10 to descend. The limiting shaft 10 drives the lower mold 9 to descend through the connecting rod 16 and the ejector rod 17, thereby causing the lower mold 9 to descend to the bottom of the mold groove 7, so that the injection hole 5 can transfer the material to the mold cavity 8 for injection molding.

[0036] The top plate 3 is provided with injection hole 5 and air pressure hole 6, and the bottom of injection hole 5 and air pressure hole 6 are connected to the upper mold 4. The air pressure hole 6 is a one-way air valve structure. The upper mold 4 and the lower mold 9 are in the same vertical position. The mold groove 7 is provided with mold cavity 8, and the mold groove 7 is slidably fitted with the lower mold 9.

[0037] The device housing 1 is provided with a limiting groove in the middle, and the device housing 1 is limited by the limiting groove and the mold groove 7. The top plate 3 is provided with four sets of limiting sleeves 11. The limiting sleeves 11 are slidably connected to the limiting shaft 10, and the limiting sleeves 11 are soft rubber sleeves that are fixedly connected to the top plate 3.

[0038] The limiting sleeve 11 drives the limiting shaft 10, connecting rod 16 and ejector rod 17 to rise and fall by pushing the upper fitting pad 12 and the lower fitting pad 13, and the ejector rod 17 passes through the bottom of the mold groove 7 and is fixedly connected to the lower mold 9.

[0039] The device housing 1 is equipped with a buffer damper 15 inside, and the bottom of the limiting shaft 10 is fixedly connected to the buffer damper 15 through the fixing seat 14. The top of the device housing 1 is slidably connected to the limiting shaft 10, and the top of the device housing 1 is fixedly connected to the piston shaft 2.

[0040] Working principle: When using this automatic demolding injection mold, first connect the equipment power supply and the power grid, and at the same time connect the top plate 3 to the lifting mechanism, so that the top plate 3 is in contact with the top of the mold groove 7 under the drive of the lifting mechanism, so that the upper mold 4 and the lower mold 9 are located in the sealed mold cavity 8 formed by the top plate 3 and the mold groove 7. When the top plate 3 descends, it will also push the lower contact pad 13 to descend, thereby causing the limiting shaft 10 to descend. The limiting shaft 10 drives the lower mold 9 to descend through the connecting rod 16 and the ejector rod 17, so that the lower mold 9 descends to the bottom of the mold groove 7, thereby allowing the injection hole 5 to transfer the material to the mold cavity 8 for injection molding;

[0041] After the workpiece is injection molded, the lifting mechanism will drive the top plate 3 to rise, so that the top plate 3 rises along the piston shaft 2. Then the top plate 3 will also fit with the upper bonding pad 12, thereby pushing the upper bonding pad 12 and the limiting shaft 10 to rise. This causes the limiting shaft 10 to drive the fixed seat 14, the connecting rod 16 and the ejector rod 17 to rise. The ejector rod 17 will also push the lower mold 9 to rise from the mold groove 7, thereby causing the lower mold 9 to lift the injection molded workpiece, so that the injection molded workpiece is demolded from the inside of the mold groove 7.

[0042] When the top plate 3 pushes the upper bonding pad 12 or the lower bonding pad 13, it will push the upper bonding pad 12 or the lower bonding pad 13 through the limiting sleeve 11. When the limiting shaft 10 is raised and lowered, the buffer damping 15 will also limit the limiting shaft 10, thereby avoiding the problem of the limiting shaft 10 shifting and causing demolding failure.

[0043] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An injection mold for automatic demolding, comprising a device housing (1) and a top plate (3) disposed on the top of the device housing (1), wherein the top of the device housing (1) is provided with four sets of piston shafts (2), and the piston shafts (2) are slidably connected to the top plate (3); Its features are: The device housing (1) is provided with a mold groove (7) inside, and a lower mold (9) is provided inside the mold groove (7). The bottom of the lower mold (9) is provided with an ejection mechanism, and an upper mold (4) is provided inside the top plate (3). The top plate (3) is connected to the ejection mechanism on the inner side, and the ejection mechanism includes a limiting shaft (10). The top of the limiting shaft (10) is provided with an upper fitting pad (12), the middle of the limiting shaft (10) is provided with a lower fitting pad (13), and the bottom of the limiting shaft (10) is provided with a fixed seat (14). The inner side of the fixed seat (14) is provided with a connecting rod (16), the top of the connecting rod (16) is provided with an ejection rod (17), and the top of the ejection rod (17) is connected to the lower mold (9).

2. The injection mold with automatic demolding according to claim 1, characterized in that, The top plate (3) is provided with an injection hole (5) and an air pressure hole (6) at the top. The bottom of the injection hole (5) and the air pressure hole (6) are connected to the upper mold (4), and the air pressure hole (6) is a one-way air outlet valve structure.

3. The injection mold with automatic demolding according to claim 2, characterized in that, The upper mold (4) and the lower mold (9) are in the same vertical position, and the mold groove (7) is provided with a mold cavity (8), and the mold groove (7) slides and fits with the lower mold (9).

4. The injection mold with automatic demolding according to claim 3, characterized in that, The device housing (1) is provided with a limiting groove in the middle, and the device housing (1) is limited by the limiting groove and the mold groove (7). The top plate (3) is provided with four sets of limiting sleeves (11) on the inner side, and the limiting sleeves (11) are slidably connected to the limiting shaft (10).

5. The injection mold with automatic demolding according to claim 4, characterized in that, The limiting sleeve (11) drives the limiting shaft (10), connecting rod (16) and ejector rod (17) to rise and fall by pushing the upper fitting pad (12) and the lower fitting pad (13), and the ejector rod (17) passes through the bottom of the mold groove (7) and is fixedly connected to the lower mold (9).

6. The injection mold with automatic demolding according to claim 5, characterized in that, The device housing (1) is provided with a buffer damper (15) inside, and the bottom of the limiting shaft (10) is fixedly connected to the buffer damper (15) through a fixing seat (14).

7. The injection mold with automatic demolding according to claim 6, characterized in that, The top of the device housing (1) is slidably connected to the limiting shaft (10), and the top of the device housing (1) is fixedly connected to the piston shaft (2).

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