An injection mold with a ramp ejection mechanism
By designing an inclined ejection mechanism, automatic demolding of injection molds is achieved through the use of electric telescopic rods and inclined plane transmission, which solves the problems of increased cost and limited use caused by motor drive in existing technologies, and improves production efficiency and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI XINDALI MOLD BASE MOULD CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-16
AI Technical Summary
Existing injection molds lack automatic ejection and demolding functions, relying on additional drive devices such as motors, which increases equipment costs and limits their use.
The inclined ejection mechanism uses an electric telescopic rod to move the upper mold up and down. Through the cooperation of push block, contact block, slider and inclined block, the ejection rod can be automatically locked and unlocked, realizing automatic demolding of injection molded parts.
It achieves automatic and stable demolding after injection molding, reducing equipment costs, improving production efficiency, avoiding workpiece damage, and enhancing the level of automation.
Smart Images
Figure CN224360599U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with a sloping ejection mechanism. Background Technology
[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. However, existing injection molds still have certain shortcomings, such as:
[0003] The application CN202320535874.1, entitled "An Injection Mold for Easy Demolding," includes a worktable. Two side plates are fixedly installed on the top of the worktable, and a top plate is fixedly installed on the top of the two side plates. An upper mold is provided below the top plate, and a lower mold is fixedly installed in the middle of the top of the worktable. A demolding assembly is provided inside the worktable. The demolding assembly includes a motor fixedly installed on the inner bottom wall of the worktable, a gear fixedly installed on the output end of the motor, and a rotating cylinder rotatably installed on the inner bottom wall of the worktable and to the right of the motor. A toothed ring that meshes with the gear is fixedly installed on the surface of the rotating cylinder, and a threaded block is threadedly installed on the inner wall of the rotating cylinder.
[0004] The demolding function of the above-mentioned injection mold relies on additional driving devices such as motors, and cannot achieve automatic demolding through pure mechanical linkage. After the injection molding operation is completed, the motor drives the gears and the drum to rotate, causing the threaded block to move upward, thereby ejecting and demolding. When the contact block contacts the reset switch, the reset switch will send a signal to the controller, which will then control the motor to shut off. By adding a motor and other devices to demold the device, automatic demolding cannot be achieved, and the cost of the equipment is also increased, resulting in limitations in use. In view of this, an injection mold with a sloping ejection mechanism is proposed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide an injection mold with a sloping ejection mechanism to solve the problem mentioned in the background art that existing injection molds do not have an automatic ejection and demolding function.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection mold with a sloping ejection mechanism, comprising a base, on which a lower mold is fixedly mounted, and an upper mold adapted to the lower mold is disposed above the lower mold;
[0007] The base has support legs at its four corners. An ejector rod is slidably installed on the base and extends into the inner cavity of the lower mold. Support columns are symmetrically arranged in pairs on the top surface of the base, and a top plate is fixedly installed on the top of the support columns. An electric telescopic rod is fixedly installed on the top surface of the top plate, and the output shaft of the electric telescopic rod slides through the top plate. The output end of the electric telescopic rod is fixedly connected to the top surface of the upper mold.
[0008] The above technical solution facilitates the stable and effective ejection of the workpiece after injection molding.
[0009] As a preferred technical solution of this utility model, the bottom surface of the base is symmetrically provided with two fixing plates, and the two fixing plates are respectively located on the left and right sides of the ejector rod. A sliding rod is slidably provided through the fixing plate, and a limit block is fixedly installed at the inner end of the sliding rod. A movable plate is provided on the inner side of the limit block, and the movable plate is fixedly installed at the bottom end of the ejector rod. Limit slots are opened on both the left and right sides of the movable plate, and the limit slots are movably inserted into the limit block.
[0010] By adopting the above technical solution, the position of the movable plate and the ejector rod can be restricted through the cooperation of the limiting block and the limiting slot, so as to prevent the ejector rod from moving unexpectedly during the injection molding process and ensure the stability of the injection molding process.
[0011] As a preferred technical solution of this utility model, push blocks are fixedly installed on the left and right sides of the upper mold, and a movable plate is provided on the outer side of the push blocks. The movable plate passes through the through groove opened on the base, and the movable plate is slidably connected to the through groove in the lateral direction. The inner side of the movable plate is fixedly connected to the outer end of the slide rod. A contact block is fixedly installed on the upper end of the inner side of the movable plate, and the bottom surface of the contact block is an inclined surface that matches the outer side of the top surface of the push block.
[0012] By adopting the above technical solution, when the upper mold moves up and down, the push block pushes the contact block or moves away from the push block, so that the moving plate drives the slide rod and the limit block to move, realizing the insertion or separation of the limit block and the limit slot, which facilitates the locking and unlocking of the ejector rod.
[0013] As a preferred embodiment of this utility model, the ejector rods are arranged in a rectangular array with multiple rods evenly distributed.
[0014] By adopting the above technical solution, it is easy to apply uniform force to the injection molded part during the ejection process, avoid deformation or damage to the injection molded part due to uneven force, and improve the ejection effect.
[0015] As a preferred embodiment of this utility model, a spring is sleeved on the outer side of the ejector rod, and the top end of the spring is fixedly connected to the bottom surface of the base, and the bottom end of the spring is fixedly connected to the top surface of the movable plate.
[0016] By adopting the above technical solution, the spring can drive the ejector rod and the movable plate to reset after the ejector rod completes the ejection action, which facilitates the next injection molding operation.
[0017] As a preferred embodiment of this utility model, a tension spring is sleeved on the outer side of the slide rod, and the inner side of the tension spring is fixedly connected to the outer side of the fixed plate, and the outer end of the tension spring is fixedly connected to the inner side of the moving plate.
[0018] By adopting the above technical solution, the tension spring can generate tension on the moving plate, and when the push block does not apply a pushing force, it can drive the moving plate, slide rod and limit block to reset, ensuring the stable cooperation between the limit block and the limit slot.
[0019] As a preferred technical solution of this utility model, a slider is provided above the contact block, and the top surface of the slider is laterally slidably connected to the bottom surface of the top plate. The bottom surface of the slider is an inclined surface that matches the inner side of the top surface of the push block, and the outer side of the slider is fixedly connected to one end of the connecting frame. The connecting frame passes through the through groove and is laterally slidably connected to the through groove. The connecting frame slides through the fixed plate, and an inclined block is fixedly installed at the other end of the connecting frame. The inner side of the inclined block is movably abutting against the movable seat fixedly installed on the bottom surface of the movable plate, and the inner side of the inclined block and the side of the movable seat are inclined surfaces that match each other.
[0020] By adopting the above technical solution, when the upper mold moves upward to open the mold, the push block will push the slider to move, which will drive the inclined block to move through the connecting frame. The inclined block and the movable seat cooperate to push the movable plate and the ejector rod to move upward, realizing the ejection of the injection molded part. The inclined plane cooperates with the transmission, the transmission is smooth and the ejection efficiency is high.
[0021] Compared with the prior art, the beneficial effects of this utility model are: the injection mold with the inclined ejection mechanism can ensure that the workpiece is automatically ejected and demolded after injection molding, and ensure stable and effective injection molding operation. The demolding operation is fully automatic and no additional electrical control operation is required, which helps to reduce equipment operating costs.
[0022] 1. The upper mold is moved up and down by the electric telescopic rod to realize the mold closing and opening operations. When the mold is closed, the push block on the upper mold separates from the contact block downward, so that the moving plate drives the slide rod and the limit block to move. The limit block is inserted into the limit slot of the moving plate to lock the ejector rod and prevent the ejector rod from moving accidentally during the injection process.
[0023] 2. When the mold is opened, the upper mold moves upward, the push block pushes the contact block, the moving plate drives the slide rod and the limit block to move outward, the limit block separates from the limit slot, releasing the lock on the ejector rod, at the same time the push block continues to move upward to push the slider to move, and drives the inclined block to move through the connecting frame. The inclined block and the movable seat cooperate to push the movable plate and the ejector rod to move upward, ejecting the injection molded part;
[0024] 3. After ejection, the electric telescopic rod drives the upper mold to move downward to the initial position. Under the action of the spring, the ejection rod and the movable plate are reset, which facilitates the next injection operation. The whole ejection process is highly automated, the ejection is stable and reliable, improves production efficiency, and avoids workpiece damage that may be caused by manual removal. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0026] Figure 2 This is a schematic diagram of the connection structure between the base, the lower mold, and the fixing plate of this utility model;
[0027] Figure 3 This is a schematic diagram of the cross-sectional connection structure between the ejector rod, the base, and the lower mold of this utility model;
[0028] Figure 4 This is a schematic diagram of the connection structure between the upper mold and the push block of this utility model;
[0029] Figure 5 This is a schematic diagram of the connection structure between the fixing plate, the sliding rod, and the connecting plate of this utility model.
[0030] In the diagram: 1. Base; 2. Lower mold; 3. Upper mold; 4. Support leg; 5. Ejector rod; 6. Support column; 7. Top plate; 8. Electric telescopic rod; 9. Fixed plate; 10. Slide rod; 11. Limiting block; 12. Movable plate; 13. Limiting slot; 14. Push block; 15. Moving plate; 16. Through slot; 17. Tension spring; 18. Contact block; 19. Slider; 20. Connecting frame; 21. Inclined block; 22. Movable seat; 23. Spring. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Please see Figure 1 - Figure 5The present invention provides a type of injection mold with an inclined ejection mechanism, comprising a base 1, on which a lower mold 2 is fixedly mounted. A controller for controlling various electrical devices is provided on the base 1. An upper mold 3, adapted to the lower mold 2, is located above the lower mold 2. The upper mold 3 has an injection channel for the flow of injection molding materials. Support legs 4 are provided at the four corners of the bottom surface of the base 1. Ejection rods 5 are longitudinally slidably mounted on the base 1 and slide through into the inner cavity of the lower mold 2. Multiple ejection rods 5 are evenly arranged in a rectangular array. Support columns 6 are symmetrically arranged in pairs on the top surface of the base 1, and a top plate 7 is fixedly mounted on the top of each support column 6. An electric telescopic rod 8 is fixedly mounted on the top surface of the top plate 7, and the output shaft of the electric telescopic rod 8 slides through the top plate 7. The output end of the electric telescopic rod 8 is fixedly connected to the top surface of the upper mold 3.
[0033] Two fixed plates 9 are symmetrically arranged on the bottom surface of the base 1, and the two fixed plates 9 are located on the left and right sides of the ejector rod 5 respectively. A sliding rod 10 is slidably arranged on the fixed plate 9, and a limit block 11 is fixedly installed on the inner end of the sliding rod 10. A movable plate 12 is arranged on the inner side of the limit block 11, and the movable plate 12 is fixedly installed on the bottom end of the ejector rod 5. Limit slots 13 are opened on both the left and right sides of the movable plate 12, and the limit slots 13 are movably inserted into the limit block 11.
[0034] Push blocks 14 are fixedly installed on the left and right sides of the upper mold 3, and a movable plate 15 is provided on the outer side of the push block 14. The movable plate 15 passes through the through groove 16 opened on the base 1, and the movable plate 15 is slidably connected to the through groove 16. The inner side of the movable plate 15 is fixedly connected to the outer end of the slide rod 10. A contact block 18 is fixedly installed on the upper end of the inner side of the movable plate 15, and the bottom surface of the contact block 18 is an inclined surface that matches the outer side of the top surface of the push block 14.
[0035] A spring 23 is fitted on the outer side of the ejector rod 5, and the top end of the spring 23 is fixedly connected to the bottom surface of the base 1, and the bottom end of the spring 23 is fixedly connected to the top surface of the movable plate 12.
[0036] A tension spring 17 is sleeved on the outer side of the slide rod 10, and the inner side of the tension spring 17 is fixedly connected to the outer side of the fixed plate 9, and the outer end of the tension spring 17 is fixedly connected to the inner side of the movable plate 15.
[0037] A slider 19 is provided above the contact block 18, and the top surface of the slider 19 is laterally slidably connected to the bottom surface of the top plate 7. The bottom surface of the slider 19 is an inclined surface that matches the inner side of the top surface of the push block 14. The outer side of the slider 19 is fixedly connected to one end of the connecting frame 20. The connecting frame 20 passes through the through groove 16 and is laterally slidably connected to the through groove 16. The connecting frame 20 slides through the fixed plate 9, and an inclined block 21 is fixedly installed at the other end of the connecting frame 20. The inner side of the inclined block 21 is movably abutting against the movable seat 22 fixedly installed on the bottom surface of the movable plate 12, and the inner side of the inclined block 21 and the side of the movable seat 22 are inclined surfaces that match each other.
[0038] Working principle: During operation, the upper mold 3 is moved up and down by the electric telescopic rod 8 on the top plate 7 to realize the mold closing and opening operations;
[0039] When the mold is closed, the upper mold 3 moves downward, and the push blocks 14 on both sides move away from the contact blocks 18 on the moving plate 15. Under the pulling force of the tension spring 17 on the outside of the slide rod 10, the moving plate 15 drives the slide rod 10 and the limiting block 11 to move inward, so that the limiting block 11 is inserted into the limiting slot 13 on the movable plate 12 at the bottom of the ejector rod 5, thereby locking the ejector rod 5 and preventing the ejector rod 5 from moving accidentally during the injection process.
[0040] When the mold is opened, the electric telescopic rod 8 drives the upper mold 3 to move upward, and the push block 14 moves upward accordingly. The outer side of the push block 14 first contacts the inclined surface of the contact block 18 and pushes the moving plate 15 to slide outward, so that the slide rod 10 drives the limit block 11 to disengage from the limit slot 13 and releases the lock on the ejector rod 5. Then the inner side of the top surface of the push block 14 contacts the inclined surface of the slider 19 and pushes the slider 19 to move inward. The slider 19 drives the inclined block 21 to move through the connecting frame 20. The inclined block 21 cooperates with the inclined surface of the movable seat 22 on the bottom surface of the movable plate 12, pushing the movable plate 12 and the ejector rod 5 to move upward. The injection part in the lower mold 2 is ejected by multiple ejector rods 5 arranged in a rectangular array, realizing automatic demolding.
[0041] After ejection, the upper mold 3 moves down to reset, the push block 14 no longer applies force, and the moving plate 15 and the limiting block 11 reset and lock the ejection rod 5 under the action of the tension spring 17. At the same time, the spring 23 on the outside of the ejection rod 5 pulls the movable plate 12 and the ejection rod 5 down to reset, so that the bottom surface of the movable plate 12 abuts against the top surface of the inclined block 21, waiting for the next injection. The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An injection mold with a sloping ejection mechanism, comprising a base (1), on the top surface of which a lower mold (2) is fixedly mounted, and an upper mold (3) adapted to the lower mold (2) is disposed above the lower mold (2), characterized in that: Support legs (4) are provided at the four corners of the bottom surface of the base (1). An ejector rod (5) is provided longitudinally through the base (1) and slides through the inner cavity of the lower mold (2). Support columns (6) are provided symmetrically in pairs on the top surface of the base (1). A top plate (7) is fixedly installed at the top of the support column (6). An electric telescopic rod (8) is fixedly installed on the top surface of the top plate (7). The output shaft of the electric telescopic rod (8) slides through the top plate (7). The output end of the electric telescopic rod (8) is fixedly connected to the top surface of the upper mold (3).
2. The injection mold with a sloped ejection mechanism according to claim 1, characterized in that, The base (1) has two fixed plates (9) symmetrically arranged on its bottom surface, and the two fixed plates (9) are located on the left and right sides of the ejector rod (5) respectively. A sliding rod (10) is slidably arranged on the fixed plate (9), and a limit block (11) is fixedly installed on the inner end of the sliding rod (10). A movable plate (12) is arranged on the inner side of the limit block (11), and the movable plate (12) is fixedly installed on the bottom end of the ejector rod (5). Limit slots (13) are opened on both the left and right sides of the movable plate (12), and the limit slots (13) are movably inserted into the limit block (11).
3. The injection mold with a sloped ejection mechanism according to claim 2, characterized in that, Push blocks (14) are fixedly installed on the left and right sides of the upper mold (3), and a movable plate (15) is provided on the outer side of the push block (14). The movable plate (15) passes through the through groove (16) opened on the base (1), and the movable plate (15) and the through groove (16) are slidably connected laterally. The inner side of the movable plate (15) is fixedly connected to the outer end of the slide rod (10). A contact block (18) is fixedly installed on the upper end of the inner side of the movable plate (15), and the bottom surface of the contact block (18) is an inclined surface that matches the outer side of the top surface of the push block (14).
4. The injection mold with a sloped ejection mechanism according to claim 1, characterized in that, The ejector rods (5) are arranged in a rectangular array of multiple rods.
5. An injection mold with a sloped ejection mechanism according to claim 1, characterized in that, A spring (23) is sleeved on the outside of the ejector rod (5), and the top end of the spring (23) is fixedly connected to the bottom surface of the base (1), and the bottom end of the spring (23) is fixedly connected to the top surface of the movable plate (12).
6. An injection mold with a sloped ejection mechanism according to claim 2, characterized in that, A tension spring (17) is sleeved on the outer side of the slide rod (10), and the inner side of the tension spring (17) is fixedly connected to the outer side of the fixed plate (9), and the outer end of the tension spring (17) is fixedly connected to the inner side of the moving plate (15).
7. An injection mold with a sloped ejection mechanism according to claim 3, characterized in that, A slider (19) is provided above the contact block (18), and the top surface of the slider (19) is laterally slidably connected to the bottom surface of the top plate (7). The bottom surface of the slider (19) is an inclined surface that matches the inner side of the top surface of the push block (14). The outer side of the slider (19) is fixedly connected to one end of the connecting frame (20). The connecting frame (20) passes through the through groove (16), and the connecting frame (20) and the through groove (16) are laterally slidably connected. The connecting frame (20) slides through the fixed plate (9), and an inclined block (21) is fixedly installed at the other end of the connecting frame (20). The inner side of the inclined block (21) is movably abutting against the movable seat (22) fixedly installed on the bottom surface of the movable plate (12), and the inner side of the inclined block (21) and the side of the movable seat (22) are inclined surfaces that match each other.