Double-layer injection mold for hot runner

Abstract

The utility model relates to the field of injection molds, in particular to a hot runner double-layer injection mold which comprises a workbench, the device comprises a workbench, and further comprises a servo motor, a gear, a feeding pipe, a tooth groove and a hot runner extrusion head, supporting rods are arranged at the corners of the upper surface of the workbench, a top cover is arranged on the top surfaces of the supporting rods, the right side of the lower surface of the top cover is rotationally connected with one end of a two-way screw, and the outer surface of the two-way screw is connected with two symmetrical moving seats in a penetrating and threaded mode; a lower mold box is mounted on the left side surface of the lower side moving seat; by arranging the servo motor, the output end of the servo motor can drive the gear to rotate during operation, and the gear can be matched with the tooth groove in the surface of the feeding pipe during rotation, so that the feeding pipe is driven to move up and down, and the height position of the hot runner extrusion head at the bottom of the feeding pipe is adjusted; and therefore, different injection molding requirements can be met.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to hot runner double-layer injection molds. Background Technology

[0002] A hot runner double-layer injection mold is a type of mold that uses a heating device to prevent the molten material in the runner from solidifying. It is mainly used for plastic injection molding. The characteristic of this type of mold is that during the injection molding process, heating or insulation methods keep the plastic in the gating system in a molten state. Each time the mold is opened, only the plastic part needs to be removed, without removing the solidified material from the runner.

[0003] Existing hot runner double-layer injection molds have fixed extrusion heads that cannot be raised or lowered according to the specific structure of the injection mold. This results in certain limitations during injection, low matching degree with the mold, and thus affects injection efficiency and injection quality.

[0004] Therefore, addressing the issue that existing hot runner double-layer injection molds have fixed extrusion heads that cannot be adjusted according to the specific mold structure, resulting in limitations during injection molding and low mold compatibility, thus affecting injection efficiency and quality, a hot runner double-layer injection mold can be designed. By incorporating a servo motor, its output end drives a gear to rotate during operation. This gear engages with the toothed grooves on the surface of the feed tube, causing the feed tube to move up and down. This allows for adjustment of the height of the hot runner extrusion head at the bottom of the feed tube, enabling it to adapt to different injection molding requirements. Utility Model Content

[0005] To overcome the problem that the existing hot runner double-layer injection mold has a fixed extrusion head that cannot be raised or lowered according to the specific structure of the injection mold, resulting in certain limitations during injection, low matching degree with the mold, and thus affecting injection efficiency and injection quality.

[0006] The technical solution of this utility model is as follows: a hot runner double-layer injection mold, including a worktable; it also includes a servo motor, gears, a feed tube, toothed grooves, and a hot runner extruder head. Support rods are provided at the corners of the upper surface of the worktable, and a top cover is provided on the top surface of the support rods. One end of a bidirectional screw is rotatably connected to the right side of the lower surface of the top cover. Two symmetrical movable seats are threaded through the outer surface of the bidirectional screw. A lower mold box is installed on the left side surface of the lower movable seat, and an upper mold box is installed on the left side surface of the upper movable seat. A servo motor is provided near the center of the upper surface of the top cover, and a gear is connected to the output end of the servo motor. A feed tube is slidably connected to the center of the upper surface of the top cover. A toothed groove is opened on the right side surface of the feed tube, and the gear meshes with the toothed groove. The bottom of the feed tube passes through the upper mold box and is connected to the hot runner extruder head.

[0007] Preferably, by setting a servo motor, its output end drives the gear to rotate during operation. When the gear rotates, it cooperates with the tooth groove on the surface of the feeding tube, thereby driving the feeding tube to move up and down. This achieves the height adjustment of the hot runner extruder head at the bottom of the feeding tube, thus adapting to different injection molding needs. This solves the problem that the extruder head of the existing hot runner double-layer injection mold is fixed in setting and cannot be raised and lowered according to the specific structure of the injection mold, resulting in certain limitations during injection molding, low matching degree with the mold, and thus affecting injection molding efficiency and injection molding quality.

[0008] Preferably, a drive motor is installed on the bottom surface of the worktable corresponding to the position of the bidirectional screw, and the output end of the drive motor is connected to the bottom surface of the bidirectional screw.

[0009] Preferably, a bearing is embedded in the upper surface of the worktable at the position corresponding to the bidirectional screw, and the outer surface of the bottom shaft of the bidirectional screw is connected to the inner ring surface of the bearing.

[0010] Preferably, a limiting seat is provided on the left side surface of both the lower mold box and the upper mold box, and a limiting rod is provided on the upper surface of the worktable at the position corresponding to the limiting seat. The top of the limiting rod is connected to the bottom of the top cover, and the limiting seat and the limiting rod are slidably connected.

[0011] Preferably, positioning holes are provided at the bottom corners of the upper mold box, and positioning rods are provided at the top corners of the lower mold box, with the positioning rods matching the positioning holes.

[0012] Preferably, the outer surface of the positioning rod is covered with a rubber sleeve, and the top of the rubber sleeve has a rounded corner design.

[0013] Preferably, the bottom surface of the workbench is equipped with support legs at the corners, and the bottom surface of the support legs is equipped with pads.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting a servo motor, its output end drives the gear to rotate during operation. When the gear rotates, it interacts with the toothed grooves on the surface of the feeding tube, thereby driving the feeding tube to move up and down. This achieves the height adjustment of the hot runner extruder head at the bottom of the feeding tube, thus adapting to different injection molding needs. This solves the problem that the extruder head of the existing hot runner double-layer injection mold is fixed in setting and cannot be raised or lowered according to the specific structure of the injection mold, resulting in certain limitations during injection molding, low matching degree with the mold, and thus affecting injection molding efficiency and injection molding quality. Attached Figure Description

[0016] Figure 1The diagram shown is a three-dimensional structural schematic of the hot runner double-layer injection mold of this utility model;

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the hot runner double-layer injection mold limiting seat of this utility model;

[0018] Figure 3 The diagram shown is a bottom-view perspective view of the upper mold box of the hot runner double-layer injection mold of this utility model.

[0019] Figure 4 The diagram shown is a schematic of the bidirectional screw structure of the hot runner double-layer injection mold of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Support rod; 3. Top cover; 4. Bidirectional screw; 5. Moving seat; 6. Lower mold box; 7. Upper mold box; 8. Servo motor; 9. Gear; 10. Feed pipe; 11. Gear groove; 12. Hot runner extruder head; 13. Drive motor; 14. Bearing; 15. Limit seat; 16. Limit rod; 17. Positioning hole; 18. Positioning rod; 19. Rubber sleeve; 20. Support leg; 21. Gasket. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-4This utility model provides an embodiment of a hot runner double-layer injection mold, including a worktable 1; it also includes a servo motor 8, a gear 9, a feed pipe 10, a toothed groove 11, and a hot runner extrusion head 12. Support rods 2 are provided at the corners of the upper surface of the worktable 1. A top cover 3 is provided on the top surface of the support rods 2. One end of a bidirectional screw 4 is rotatably connected to the right side of the lower surface of the top cover 3. Two symmetrical movable seats 5 are threadedly connected to the outer surface of the bidirectional screw 4. A lower mold box 6 is installed on the left side of the lower movable seat 5, and an upper mold box 7 is installed on the left side of the upper movable seat 5. A servo motor 8 is located near the center of the upper surface of the top cover 3. The output end of the servo motor 8 is connected to the gear 9. A feed pipe 10 is slidably connected to the center of the upper surface of the top cover 3. A toothed groove 11 is provided on the right side surface, and a gear 9 meshes with the toothed groove 11. The bottom of the feed tube 10 passes through the upper mold box 7 and is connected to the hot runner extruder head 12. By setting a servo motor 8, its output end will drive the gear 9 to rotate during operation. When the gear 9 rotates, it will cooperate with the toothed groove 11 on the surface of the feed tube 10, thereby driving the feed tube 10 to move up and down. This realizes the height adjustment of the hot runner extruder head 12 at the bottom of the feed tube 10, so that it can adapt to different injection molding needs. This solves the problem that the extruder head of the existing hot runner double-layer injection mold is fixed in setting and cannot be raised and lowered according to the specific structure of the injection mold, resulting in certain limitations during injection molding, low matching degree with the mold, and thus affecting injection molding efficiency and injection molding quality.

[0023] Please see Figures 1-4 In this embodiment, a drive motor 13 is installed on the bottom surface of the workbench 1 at the position corresponding to the bidirectional screw 4. The output end of the drive motor 13 is connected to the bottom surface of the bidirectional screw 4. By setting the drive motor 13, its output end will drive the bidirectional screw 4 to rotate during operation. When the bidirectional screw 4 rotates, it can drive the two moving seats 5 to move synchronously in opposite directions, thereby facilitating the control of the mold opening accuracy of the upper mold box 7 and the lower mold box 6. A bearing 14 is embedded and installed on the upper surface of the workbench 1 at the position corresponding to the bidirectional screw 4. The outer surface of the bottom rotating shaft of the bidirectional screw 4 is connected to the inner ring surface of the bearing 14. By setting the bearing 14, the bidirectional screw 4 can be improved. To improve rotational stability and reduce the workload of the drive motor 13, thereby increasing the service life of the equipment, limit seats 15 are provided on the left side surfaces of both the lower mold box 6 and the upper mold box 7. Limit rods 16 are provided on the upper surface of the worktable 1 at the positions corresponding to the limit seats 15. The top of the limit rods 16 is connected to the bottom of the top cover 3. The limit seats 15 and the limit rods 16 are slidably connected. By setting the limit seats 15 and the limit rods 16, when the upper mold box 7 and the lower mold box 6 move, the limit seats 15 will slide synchronously on the outer surface of the limit rods 16. The limit rods 16 will then restrict the sliding direction of the limit seats 15, thereby improving the stability of the movement of the upper mold box 7 and the lower mold box 6.

[0024] Please see Figures 1-4 In this embodiment, positioning holes 17 are provided at the corners of the bottom surface of the upper mold box 7, and positioning rods 18 are provided at the corners of the upper surface of the lower mold box 6. The positioning rods 18 match the positioning holes 17. By setting the positioning holes 17 and positioning rods 18, the upper mold box 7 and the lower mold box 6 can be connected, improving the connection accuracy between the two and thus improving the injection molding quality. The outer surface of the positioning rods 18 is covered with rubber sleeves 19. The top of the rubber sleeves 19 is designed with rounded corners. By setting the rubber sleeves 19, after the positioning rods 18 are inserted into the positioning holes 17, the rubber sleeves 19 will be squeezed, thereby enabling the positioning rods 18 to be tightly connected with the positioning holes 17. Support legs 20 are provided at the corners of the bottom surface of the worktable 1, and pads 21 are provided on the bottom surface of the support legs 20. By setting the support legs 20 and pads 21, the overall stability of the device during use can be improved, and the anti-slip effect can be improved.

[0025] During operation, the drive motor 13 drives the bidirectional screw 4 to rotate at its output. The rotation of the bidirectional screw 4 causes the two moving seats 5 to move synchronously in opposite directions, facilitating control of the mold opening accuracy of the upper mold box 7 and the lower mold box 6. The bearing 14 improves the stability of the bidirectional screw 4's rotation, reducing the workload on the drive motor 13 and thus increasing the equipment's lifespan. The limit seat 15 and limit rod 16 allow the limit seat 15 to slide synchronously on the outer surface of the limit rod 16 as the upper mold box 7 and lower mold box 6 move. The limiting rod 16 restricts the sliding direction of the limiting seat 15, thereby improving the stability of the movement of the upper mold box 7 and the lower mold box 6. By setting the positioning hole 17 and the positioning rod 18, the upper mold box 7 and the lower mold box 6 can be connected, improving the connection accuracy and thus improving the injection molding quality. By setting the rubber sleeve 19, after the positioning rod 18 is inserted into the positioning hole 17, the rubber sleeve 19 will be squeezed, thereby enabling the positioning rod 18 to be tightly connected to the positioning hole 17. By setting the support leg 20 and the pad 21, the overall stability of the device during use can be improved, and the anti-slip effect can be enhanced.

[0026] Through the above steps, by setting the servo motor 8, its output end will drive the gear 9 to rotate during operation. When the gear 9 rotates, it will cooperate with the toothed groove 11 on the surface of the feeding tube 10, thereby driving the feeding tube 10 to move up and down. This realizes the height position adjustment of the hot runner extruder head 12 at the bottom of the feeding tube 10, so that it can adapt to different injection molding needs. This solves the problem that the extruder head of the existing hot runner double-layer injection mold is fixed in use and cannot be raised and lowered according to the specific structure of the injection mold, resulting in certain limitations during injection molding, low matching degree with the mold, and thus affecting injection molding efficiency and injection molding quality.

Claims

1. A hot runner double-layer injection mold, comprising a worktable (1); characterized in that: It also includes a servo motor (8), gears (9), a feed tube (10), a toothed groove (11), and a hot runner extruder (12). Support rods (2) are provided at the corners of the upper surface of the worktable (1). A top cover (3) is provided on the top surface of the support rods (2). One end of a bidirectional screw (4) is rotatably connected to the right side of the lower surface of the top cover (3). Two symmetrical moving seats (5) are threaded through the outer surface of the bidirectional screw (4). A lower mold box (6) is installed on the left side surface of the lower moving seat (5). The upper mold box (7) is installed on the left side surface of the upper moving seat (5). A servo motor (8) is set near the center of the upper surface of the top cover (3). The output end of the servo motor (8) is connected to a gear (9). A feeding pipe (10) is slidably connected to the center of the upper surface of the top cover (3). A toothed groove (11) is opened on the right side surface of the feeding pipe (10). The gear (9) meshes with the toothed groove (11). The bottom of the feeding pipe (10) passes through the upper mold box (7) and is connected to a hot runner extruder (12).

2. The hot runner double-layer injection mold according to claim 1, characterized in that: A drive motor (13) is provided on the bottom surface of the workbench (1) at the position corresponding to the bidirectional screw (4), and the output end of the drive motor (13) is connected to the bottom surface of the bidirectional screw (4).

3. The hot runner double-layer injection mold according to claim 1, characterized in that: A bearing (14) is embedded in the upper surface of the worktable (1) at the position corresponding to the bidirectional screw (4), and the outer surface of the bottom shaft of the bidirectional screw (4) is connected to the inner ring surface of the bearing (14).

4. The hot runner double-layer injection mold according to claim 1, characterized in that: The left side surfaces of the lower mold box (6) and the upper mold box (7) are provided with limit seats (15), and the upper surface of the worktable (1) is provided with limit rods (16) corresponding to the position of the limit seats (15). The top of the limit rods (16) is connected to the bottom of the top cover (3), and the limit seats (15) and the limit rods (16) are slidably connected.

5. The hot runner double-layer injection mold according to claim 1, characterized in that: Positioning holes (17) are provided at the bottom corners of the upper mold box (7), and positioning rods (18) are provided at the top corners of the lower mold box (6). The positioning rods (18) match the positioning holes (17).

6. The hot runner double-layer injection mold according to claim 5, characterized in that: The outer surface of the positioning rod (18) is covered with a rubber sleeve (19), and the top of the rubber sleeve (19) is designed with rounded corners.

7. The hot runner double-layer injection mold according to claim 1, characterized in that: The bottom surface of the workbench (1) is provided with support legs (20) at the corners, and the bottom surface of the support legs (20) is provided with pads (21).

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