Core pulling device for injection mold

Abstract

The utility model discloses a core pulling device for an injection mold, and belongs to the technical field of injection molding equipment. Comprising a truncated cone; the two rotating plates are rotationally arranged on the outer side of the circular truncated cone; the vertical plate is fixedly arranged at the top of the rotating plate, and two stand columns are fixedly arranged at the top of the vertical plate; the lifting assembly is arranged at the top of the vertical plate; the core pulling assembly is slidably arranged on the outer side of the stand column; wherein the core pulling assembly comprises a core pulling rod, the core pulling rod is arranged on the inner side of the core pulling seat in a sliding mode, and the core pulling assembly is driven by the lifting assembly to slide along the stand column to conduct position adjustment. The position of the core-pulling rod can be adjusted, so that the problems that the angle of the core-pulling rod is difficult to adjust according to injection molding working conditions and different injection molding processes are difficult to adapt are effectively solved, and the effect of conveniently adjusting the angle of the core-pulling rod is achieved.

Description

Technical Field

[0001] This application relates to the field of injection molding equipment technology, and more specifically, to a core-pulling device for injection molds. Background Technology

[0002] A core-pulling device is a structure used to deal with undercuts in injection molds. Undercuts refer to the presence of side holes, grooves, or protrusions on the parting surface of the product that are different from the mold opening direction. These shapes can prevent the product from being smoothly demolded from the mold. The core-pulling device designs the cores that form these side shapes to be movable and pulls them out before demolding, thereby preventing the product from getting stuck in the mold and ensuring smooth demolding.

[0003] In related technologies, to address the problem that core-pulling devices in injection molds cannot demold injection molded parts with internal injection thread grooves, for example, patent CN219294623U provides a core-pulling device and injection mold for injection molds. This device inserts the injection threaded portion of a spiral core-pulling rod into the injection cavity to form the required threaded injection molded part within the cavity. The driving threaded portion of the spiral core-pulling rod is then connected to a fixed base. The spiral core-pulling rod can rotate relative to the fixed base, thereby driving the injection threaded portion to move away from the injection cavity, thus completing the demolding of the injection molded part and simultaneously completing the injection molding of the part. This solves the problem that existing injection molds are unsuitable for injection molding and demolding of injection molded parts with internal thread grooves.

[0004] Although the existing technical solutions mentioned above can achieve the effect of moving the injection thread away from the injection cavity by setting the drive thread part, the core pull rod can only be set on one side of the injection mold by the fixed seat. It is difficult to adjust the angle of the core pull rod according to the injection conditions and it is difficult to adapt to different injection molding processes.

[0005] In view of this, we propose a core-pulling device for injection molds. Utility Model Content

[0006] The purpose of this application is to provide a core-pulling device for injection molds, which can effectively solve the problem in the prior art that the core-pulling rod is difficult to adjust the angle according to the injection molding conditions and is difficult to adapt to different injection molding processes.

[0007] This application provides a core-pulling device for injection molds, comprising:

[0008] Frustum;

[0009] Two rotating plates are rotatably positioned on the outer side of the frustum;

[0010] An upright plate is fixedly installed on the top of the rotating plate, and two upright columns are fixedly installed on the top of the upright plate;

[0011] The lifting assembly is located at the top of the upright plate;

[0012] The core-pulling assembly is slidably mounted on the outside of the column;

[0013] The core-pulling assembly includes a core-pulling rod, which is slidably disposed inside the core-pulling base. The core-pulling assembly is driven by the lifting assembly to slide along the column for position adjustment. The core-pulling rod is driven by an external force to trigger the core-pulling action.

[0014] As an optional solution to the technical solution of this application, a gear ring is fixedly provided on the outer side of the frustum, one side of the two rotating plates is fixedly provided by a fixing pin, a gear is rotatably provided between the two rotating plates, the outer side of the gear meshes with the outer side of the gear ring, and a drive motor A is fixedly provided on the top of the rotating plate for driving the gear to rotate.

[0015] As an optional solution to the technical solution of this application, the lifting assembly includes two reciprocating lead screws, each with a threaded moving block threaded on its outer side. The two threaded moving blocks are slidably disposed with respect to the outer side of the corresponding column. The bottom of each of the two reciprocating lead screws is fixedly disposed at the output end of the gearbox A. The gearbox A is driven by the drive motor A to rotate the two reciprocating lead screws.

[0016] As an optional solution to the technical solution of this application, both output ends of the drive motor A are provided with one-way bearings, the locking directions of the two one-way bearings are opposite, the inner rings of the two one-way bearings are fixedly disposed with the output ends of the drive motor A, the outer ring of one of the one-way bearings is fixedly disposed with the inner side of the bushing B fixed to the output end of the gearbox A, and the outer ring of the other one-way bearing is fixedly disposed with the inner side of the bushing A fixed to the gear drive shaft.

[0017] As an optional solution to the technical solution in this application, an adjustment component A is fixedly provided at the bottom of the core-pulling seat, which is used to drive the core-pulling seat to rotate and thereby adjust the orientation of the core-pulling rod.

[0018] As an optional solution to the technical solution of this application, the adjustment component A includes a rotating seat, which is fixedly disposed at the bottom of the core-pulling seat. The rotating seat rotates under the drive of the drive motor B, which is fixedly disposed at the bottom of the fixed seat. The fixed seat is fixedly disposed on the inner side of the adjustment component B, and the adjustment component B is disposed on the outer side of the threaded moving block, for driving the adjustment component A to rotate so as to adjust the pitch angle of the core-pulling component.

[0019] As an optional solution to the technical solution of this application, the adjustment component B includes two rotating columns. The sides of the two rotating columns that are close to each other are fixedly disposed on the outer side of the fixed base, and the sides of the two rotating columns that are far from each other are rotatably disposed on the inner side of the corresponding threaded moving block. One of the rotating columns is driven to rotate by an external force.

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] (1) This application uses a rotating plate and a lifting assembly. The rotating plate can drive the core-pulling assembly to rotate, and the lifting assembly can drive the core-pulling assembly to rise and fall, thus adjusting the position of the core-pulling rod. Therefore, it effectively solves the problem that the core-pulling rod is difficult to adjust the angle according to the injection molding conditions and is difficult to adapt to different injection molding processes, thereby achieving the effect of easy adjustment of the core-pulling rod angle.

[0022] (2) This application adjusts the orientation and pitch angle of the core-pulling rod by setting adjustment component A and adjustment component B at the bottom of the core-pulling assembly, and can adjust the angle of the core-pulling rod in all directions in conjunction with the rotating plate and lifting component. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a core-pulling device for injection molds disclosed in a preferred embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the frustum in the core-pulling device for injection molds disclosed in a preferred embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the lifting component in the core-pulling device for injection molds disclosed in a preferred embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the drive motor A in the core-pulling device for injection molds disclosed in a preferred embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the core-pulling component in the core-pulling device for injection molds disclosed in a preferred embodiment of this application;

[0028] The following are the labeling instructions in the diagram: 1. Frustum; 11. Gear ring; 12. Mounting base; 13. Base plate; 2. Rotating plate; 21. Gear; 211. Bushing A; 22. Fixing pin; 3. Vertical plate; 31. Column; 4. Lifting assembly; 41. Reciprocating screw; 42. Threaded moving block; 5. Core pulling assembly; 51. Core pulling rod; 52. Core pulling seat; 53. Mounting block; 54. Electric push rod; 6. Drive motor A; 61. Gearbox A; 611. Bushing B; 62. One-way bearing; 7. Adjusting assembly A; 71. Rotating seat; 72. Drive motor B; 73. Fixing base; 8. Adjusting assembly B; 81. Drive motor C; 82. Gearbox B; 83. Rotating column. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1 , Figure 2 and Figure 5 This application discloses a core-pulling device for injection molds, including a frustum 1. A mounting base 12 is fixedly disposed on the top of the frustum 1, and a base plate 13 is fixedly disposed on the bottom of the frustum 1. Two rotating plates 2 are rotatably disposed on the outer side of the frustum 1. A vertical plate 3 is fixedly disposed on the top of the rotating plate 2. Two columns 31 are fixedly disposed on the top of the vertical plate 3. A lifting assembly 4 is disposed on the top of the vertical plate 3. A core-pulling assembly 5 is slidably disposed on the outer side of the columns 31. The core-pulling assembly 5 includes a core-pulling rod 51, which is slidably disposed on a core-pulling base 52. Inside, the core-pulling assembly 5 is driven by the lifting assembly 4 to slide along the column 31 for position adjustment. The core-pulling rod 51 is driven by external force to trigger the core-pulling action. For example, two electric push rods 54 can be fixedly installed on the outside of the core-pulling seat 52 so that the two electric push rods 54 drive the core-pulling rod 51 to trigger the core-pulling action. The core-pulling rod 51 can be installed on the inside of the core-pulling seat 52 by the mounting block 53. The mounting block 53 has a core-pulling hole on its inner side, and a sealing gasket is provided on the inner side of the core-pulling hole. The inner side of the sealing gasket matches the shape of the core-pulling rod 51.

[0031] The equipment can be installed in a suitable position via the base plate 13. The mounting base 12 can be used to install the injection mold. During core pulling, the core pulling rod 51 is driven to slide inside the core pulling base 52 by two electric push rods 54, thereby pulling the core pulling rod 51 out of the injection mold.

[0032] When adjusting the position of the core-pulling rod 51, the two rotating plates 2 drive the upright plate 3 and the column 31 to rotate, thereby driving the core-pulling assembly 5 to rotate, so that the core-pulling rod 51 rotates to a suitable position. Then, the lifting assembly 4 drives the core-pulling assembly 5 to slide along the column 31, thereby driving the core-pulling rod 51 to adjust to a suitable height, so as to facilitate the position adjustment of the core-pulling rod 51 to adapt to different injection molding processes.

[0033] Reference Figure 1 , Figure 3 and Figure 4 A gear ring 11 is fixedly installed on the outer side of the truncated cone 1. One side of the two rotating plates 2 is fixedly installed by a fixing pin 22. A gear 21 is rotatably installed between the two rotating plates 2. The outer side of the gear 21 meshes with the outer side of the gear ring 11. A drive motor A6 is fixedly installed on the top of the rotating plate 2 to drive the gear 21 to rotate. The lifting assembly 4 includes two reciprocating screws 41. A threaded moving block 42 is threadedly installed on the outer side of each of the two reciprocating screws 41. The two threaded moving blocks 42 are slidably installed on the outer side of the corresponding column 31. The bottom of the two reciprocating screws 41 is fixed. Located at the output end of gearbox A61, gearbox A61 is driven by drive motor A6 to rotate two reciprocating lead screws 41. Both output ends of drive motor A6 are equipped with one-way bearings 62, and the locking directions of the two one-way bearings 62 are opposite. The inner rings of the two one-way bearings 62 are fixed to the output end of drive motor A6. The outer ring of one one-way bearing 62 is fixed to the inner side of bushing B611, which is fixed to the output end of gearbox A61, and the outer ring of the other one-way bearing 62 is fixed to the inner side of bushing A211, which is fixed to the drive shaft of gear 21.

[0034] When adjusting the position of the core-pulling rod 51, the output end of the drive motor A6 rotates forward. Under the unidirectional effect of the one-way bearing 62, the bushing A211 rotates, which in turn drives the gear 21 to rotate. The gear 21 meshes with the gear ring 11, which in turn drives the two rotating plates 2 to rotate. The two rotating plates 2 drive the upright plate 3 and the column 31 to rotate, which in turn drives the core-pulling assembly 5 to rotate, so that the core-pulling rod 51 rotates to the appropriate position. Then, the output end of the drive motor A6 rotates in reverse. Under the unidirectional effect of the one-way bearing 62, the bushing B611 rotates, which makes the gearbox A61 run. This drives the two reciprocating screws 41 to rotate. The two reciprocating screws 41 are threadedly engaged with the two threaded moving blocks 42, which slide along the two columns 31. This causes the core-pulling assembly 5 to slide along the columns 31, thereby adjusting the core-pulling rod 51 to the appropriate height. This facilitates the position adjustment of the core-pulling rod 51 to adapt to different injection molding processes.

[0035] Reference Figure 1 and Figure 5An adjusting component A7 is fixedly installed at the bottom of the core-pulling seat 52. This component drives the core-pulling seat 52 to rotate, thereby adjusting the orientation of the core-pulling rod 51. The adjusting component A7 includes a rotating seat 71, which is fixedly installed at the bottom of the core-pulling seat 52. The rotating seat 71 rotates under the drive of a drive motor B72, which is fixedly installed at the bottom of a fixed seat 73. The fixed seat 73 is fixedly installed inside the adjusting component B8, which is located outside the threaded moving block 42. The adjusting component B8 drives the adjusting component A7 to rotate, thereby adjusting the orientation of the core-pulling assembly 51. The pitch angle adjustment component B8 includes two rotating columns 83. The sides of the two rotating columns 83 that are close to each other are fixedly set to the outer side of the fixed base 73, and the sides of the two rotating columns 83 that are far from each other are rotatably set to the inner side of the corresponding threaded moving block 42. One of the rotating columns 83 is driven to rotate by an external force. A gearbox B82 can be set on the outer side of one of the rotating columns 83, and the output end of the gearbox B82 is fixedly set to the outer side of the rotating column 83, so that the gearbox B82 can drive the rotating column 83 to rotate under the drive of the drive motor C81.

[0036] After the position and height of the core-pulling rod 51 are adjusted, the rotating seat 71 can be driven to rotate by the drive motor B72, thereby driving the core-pulling assembly 5 to rotate and adjusting the orientation of the core-pulling rod 51. Then, the gearbox B82 driven by the drive motor C81 drives a rotating column 83 to rotate, thereby driving the fixed seat 73 to rotate, so that the fixed seat 73 drives the top core-pulling assembly 5 to rotate and adjust the pitch angle of the core-pulling rod 51. Two rotating columns 83 are provided to increase the stability of the fixed seat 73 when it rotates.

[0037] In summary, when the core-pulling device for injection molds disclosed in this application is used to adjust the position of the core-pulling rod 51, the output end of the drive motor A6 rotates forward. Under the unidirectional effect of the one-way bearing 62, the bushing A211 rotates, thereby driving the gear 21 to rotate. The gear 21 meshes with the gear ring 11, thereby driving the two rotating plates 2 to rotate. The two rotating plates 2 drive the upright plate 3 and the column 31 to rotate, thereby driving the core-pulling assembly 5 to rotate, so that the core-pulling rod 51 rotates to the appropriate position. Then, the output end of the drive motor A6 reverses, and under the unidirectional effect of the one-way bearing 62, the bushing B611 rotates, thereby running the gearbox A61, driving the two... When the reciprocating lead screw 41 rotates, the two reciprocating lead screws 41 are threadedly engaged with the two threaded moving blocks 42, causing the two threaded moving blocks 42 to slide along the two columns 31, which in turn causes the core-pulling assembly 5 to slide along the columns 31, thereby adjusting the core-pulling rod 51 to a suitable height. The drive motor B72 drives the rotating seat 71 to rotate, which in turn drives the core-pulling assembly 5 to rotate, adjusting the orientation of the core-pulling rod 51. Then, the drive motor C81 drives the gearbox B82 to rotate a rotating column 83, which in turn drives the fixed seat 73 to rotate, causing the fixed seat 73 to drive the top core-pulling assembly 5 to rotate, adjusting the pitch angle of the core-pulling rod 51, which facilitates the position adjustment of the core-pulling rod 51 to adapt to different injection molding processes.

Claims

1. A core-pulling device for injection molds, characterized in that, Include: Frustum (1); Two rotating plates (2) are rotatably positioned on the outside of the frustum (1); An upright plate (3) is fixedly installed on the top of the rotating plate (2), and two upright columns (31) are fixedly installed on the top of the upright plate (3); The lifting assembly (4) is located on the top of the upright plate (3); The core-pulling assembly (5) is slidably disposed on the outside of the column (31); The core-pulling assembly (5) includes a core-pulling rod (51), which is slidably disposed on the inner side of the core-pulling seat (52). The core-pulling assembly (5) is driven by the lifting assembly (4) to slide along the column (31) for position adjustment. The core-pulling rod (51) is driven by an external force to trigger the core-pulling action.

2. The core-pulling device for injection molds according to claim 1, characterized in that: A gear ring (11) is fixedly installed on the outer side of the truncated cone (1). One side of the two rotating plates (2) is fixedly installed by a fixing pin (22). A gear (21) is rotatably installed between the two rotating plates (2). The outer side of the gear (21) meshes with the outer side of the gear ring (11). A drive motor A (6) is fixedly installed on the top of the rotating plate (2) for driving the gear (21) to rotate.

3. The core-pulling device for injection molds according to claim 2, characterized in that: The lifting assembly (4) includes two reciprocating lead screws (41). Each of the two reciprocating lead screws (41) has a threaded moving block (42) threaded on its outer side. The two threaded moving blocks (42) are slidably disposed on the outer side of the corresponding column (31). The bottom of each of the two reciprocating lead screws (41) is fixedly disposed at the output end of the gearbox A (61). The gearbox A (61) is driven by the drive motor A (6) to rotate the two reciprocating lead screws (41).

4. The core-pulling device for injection molds according to claim 3, characterized in that: Both output ends of the drive motor A (6) are provided with one-way bearings (62), the locking directions of the two one-way bearings (62) are opposite, the inner rings of the two one-way bearings (62) are fixed to the output ends of the drive motor A (6), the outer ring of one of the one-way bearings (62) is fixed to the inner side of the bushing B (611) fixed to the output end of the gearbox A (61), and the outer ring of the other one-way bearing (62) is fixed to the inner side of the bushing A (211) fixed to the drive shaft of the gear (21).

5. The core-pulling device for injection molds according to claim 3, characterized in that: An adjustment component A (7) is fixedly provided at the bottom of the core-pulling seat (52) for driving the core-pulling seat (52) to rotate, thereby adjusting the orientation of the core-pulling rod (51).

6. The core-pulling device for injection molds according to claim 5, characterized in that: The adjustment component A (7) includes a rotating seat (71), which is fixedly disposed at the bottom of the core-pulling seat (52). The rotating seat (71) rotates under the drive of the drive motor B (72), which is fixedly disposed at the bottom of the fixed seat (73). The fixed seat (73) is fixedly disposed on the inner side of the adjustment component B (8), which is disposed on the outer side of the threaded moving block (42) and is used to drive the adjustment component A (7) to rotate so as to adjust the pitch angle of the core-pulling component (5).

7. The core-pulling device for injection molds according to claim 6, characterized in that: The adjustment component B (8) includes two rotating columns (83). The two rotating columns (83) are fixedly installed on the outside of the fixed base (73) on the side that is close to each other, and the two rotating columns (83) are rotatably installed on the inside of the corresponding threaded moving block (42) on the side that is far away from each other. One of the rotating columns (83) is driven to rotate by an external force.

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