An apparatus for liquid rubber injection molding

Abstract

This utility model discloses a liquid rubber injection molding device, including a base. A motor is fixedly connected to the outer wall of the base, and a threaded rod is fixedly connected to the output end of the motor. A connecting block is threadedly connected to the outer wall of the threaded rod, and a first inclined block is fixedly connected to the top of the connecting block. In actual use, the motor, fixed to the outside, drives the threaded rod to rotate after startup, causing the threaded connecting block to move horizontally. When the connecting block moves, the first inclined block pushes the second inclined block. Guided by the limiting plate and the inner groove, the top block slides vertically upward along the inner hole of the lower mold, quickly removing the workpiece from the lower mold. This design solves the problems of difficult mold removal and low efficiency in existing liquid rubber injection molding devices. Traditional devices often rely on manual or complex mechanical structures for demolding, which is not only time-consuming and labor-intensive but also easily damages the mold and the finished product. This structure achieves automated ejection of injection molded parts through motor drive and inclined plane transmission.

Description

Technical Field

[0001] This utility model relates to the technical field of rubber production, specifically to an apparatus for liquid rubber injection molding. Background Technology

[0002] This liquid rubber injection molding apparatus is a specialized device for efficient molding of liquid rubber, mainly composed of a barrel, an injection system, a mold temperature control system, and a hydraulic drive system. The barrel stores the liquid rubber raw material and maintains a constant temperature through a heating device, ensuring the material retains its low viscosity and flow properties. Under hydraulic drive, the injection system injects the rubber from the barrel into a precision mold cavity at high pressure and high speed, utilizing the pre-set flow channel structure within the mold to fill complex-shaped products. The mold temperature control system precisely controls the mold temperature through a circulating heat transfer medium (such as hot oil or cold water), promoting rapid vulcanization and shaping of the rubber within the cavity, ensuring dimensional accuracy and surface quality. The apparatus is equipped with an intelligent control system that can monitor injection pressure, temperature, flow rate, and other parameters in real time, and automatically adjust process parameters, reducing manual intervention. This equipment is suitable for producing rubber products such as seals and shock absorbers, featuring high production efficiency, stable molding quality, and strong repeatability, and is widely used in the automotive, electronics, and medical industries.

[0003] A search revealed that Chinese patent CN217047265U discloses a device for liquid rubber injection molding. This patent describes a method that involves adding a demolding frame embedded in the inner wall of the injection molding mold, and adding equidistantly arranged telescopic springs at the points where the demolding frame connects to the inner walls of both ends of the bottom mold. This allows the demolding frame to be directly ejected outwards by the telescopic springs when the molded item is demolded, thus pushing the item outwards and avoiding the problem of the molded item getting stuck inside the mold during processing. This significantly improves the processing efficiency of the device.

[0004] In this solution, although demolding is achieved by popping out the demolding frame with a telescopic spring, which improves the demolding problem to a certain extent, there are still shortcomings. The elastic force of the telescopic spring is difficult to control precisely, which will lead to uneven force on the product during demolding, resulting in deformation or damage. In order to solve this technical problem, this utility model proposes a device for liquid rubber injection molding. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In this solution, although demolding is achieved by popping out the demolding frame with a telescopic spring, which improves the demolding problem to a certain extent, there are still shortcomings. The elastic force of the telescopic spring is difficult to control precisely, which will lead to uneven force on the product during demolding, resulting in deformation or damage. In order to solve this technical problem, this utility model proposes a device for liquid rubber injection molding.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a device for liquid rubber injection molding, comprising a base, a motor fixedly connected to the outer wall of the base, a threaded rod fixedly connected to the output end of the motor, a connecting block threadedly connected to the outer wall of the threaded rod, a first inclined block fixedly connected to the top of the connecting block, a top block slidably connected inside the base, a second inclined block fixedly connected to the bottom of the top block, and the second inclined block corresponding to the first inclined block, a lower mold provided above the base, an inner hole opened inside the lower mold, and the top block slidably connected inside the inner hole.

[0009] Preferably, a pair of sliding grooves are provided on the upper part of the base, and sliding plates are fixedly connected to both outer walls of the lower mold, and the sliding plates are slidably connected inside the sliding grooves. A pair of pins are provided on the outside of the base, and a pair of insertion holes are provided inside the base, with the pins slidably connected inside the insertion holes.

[0010] Preferably, a bracket is fixedly connected to the top of the base, an electric push rod is fixedly connected to the top of the bracket, and a pressure plate is fixedly connected to the output end of the electric push rod, with the pressure plate corresponding to the slide groove.

[0011] Preferably, a pair of limiting rods are fixedly connected to the top of the pressure plate, a limiting ring is fixedly connected to the upper outer wall of the limiting rod, and a spring is fixedly connected to the bottom wall of the limiting ring. The other end of the spring is fixedly connected to a housing, and the housing is slidably connected to the outer wall of the limiting rod. At the same time, the output end of the electric push rod passes through the housing and extends to the pressure plate.

[0012] Preferably, an injection port is fixedly connected inside the outer shell, an insert plate is fixedly connected to the bottom of the injection port, and a slot is opened on the top of the lower mold, with the insert plate inserted into the slot.

[0013] Preferably, the base has an inner groove, and the two side walls below the top block are fixedly connected to limit plates, which are slidably connected within the inner groove.

[0014] (III) Beneficial Effects

[0015] This invention provides an apparatus for liquid rubber injection molding. It has the following beneficial effects:

[0016] (1) The motor is fixed on its outer side. After starting, it drives the threaded rod to rotate, causing the threaded connecting block to move horizontally. When the connecting block moves, the first inclined block pushes the second inclined block. Under the guidance of the limiting plate and the inner groove, the top block slides vertically upward along the inner hole of the lower mold and quickly removes the workpiece from the lower mold. This design solves the problems of difficult mold removal and low efficiency of existing liquid rubber injection molding devices. Traditional devices mostly rely on manual or complex mechanical structures for demolding, which is not only time-consuming and labor-intensive, but also easily damages the mold and finished product. This structure realizes automated ejection of injection molded parts through motor drive and inclined plane transmission. At the same time, the smooth upward movement of the top block can avoid deformation of the finished product, ensure product quality, reduce labor costs, and effectively improve the production efficiency and stability of liquid rubber injection molding.

[0017] (2) The sliding plates on both sides of the lower mold and the sliding grooves on the base form a sliding guide structure. During installation, the sliding plates are aligned with the sliding grooves and pushed in to achieve quick positioning of the lower mold. Inserting the pins through the holes on the base securely fixes the lower mold, preventing displacement during injection molding. During disassembly, the pins are pulled out, and the sliding plates can be pulled out along the sliding grooves to complete the quick disassembly of the lower mold. This design solves the problem of cumbersome and time-consuming mold installation and disassembly in traditional liquid rubber injection molding devices. In the past, devices mostly used bolt fastening, and each time the mold was changed, a lot of time was spent tightening the bolts, which seriously affected production efficiency. This design enables the equipment to quickly switch between different specifications of molds, significantly improving production flexibility. It is especially suitable for multi-variety, small-batch production scenarios, while reducing the labor intensity and operation difficulty of workers. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the external structure of the lower mold of this utility model.

[0022] In the diagram: 1. Base; 2. Bracket; 3. Lower mold; 4. Inner hole; 5. Motor; 6. Threaded rod; 7. Connecting block; 8. Inclined block one; 9. Inclined block two; 10. Top block; 11. Limiting plate; 12. Inner groove; 13. Slide groove; 14. Slide plate; 15. Insertion hole; 16. Electric push rod; 17. Pressure plate; 18. Outer shell; 19. Limiting rod; 20. Limiting ring; 21. Spring; 22. Injection port; 23. Insert plate; 24. Slot; 25. Pin. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] Example 1: A device for liquid rubber injection molding includes a base 1, a motor 5 fixedly connected to the outer wall of the base 1, a threaded rod 6 fixedly connected to the output end of the motor 5, a connecting block 7 threadedly connected to the outer wall of the threaded rod 6, a first inclined block 8 fixedly connected to the top of the connecting block 7, a top block 10 slidably connected inside the base 1, a second inclined block 9 fixedly connected to the bottom of the top block 10, and the second inclined block 9 corresponding to the first inclined block 8, a lower mold 3 is provided above the base 1, an inner hole 4 is opened inside the lower mold 3, and the top block 10 is slidably connected inside the inner hole 4, a bracket 2 fixedly connected to the top of the base 1, an electric push rod 16 fixedly connected to the top of the bracket 2, a pressure plate 17 fixedly connected to the output end of the electric push rod 16, and the pressure plate 17 is opposite to the slide groove 13. A pair of limiting rods 19 are fixedly connected to the top of the pressure plate 17. A limiting ring 20 is fixedly connected to the outer wall above the limiting rods 19, and a spring 21 is fixedly connected to the bottom wall of the limiting ring 20. The other end of the spring 21 is fixedly connected to the outer shell 18. The outer shell 18 is slidably connected to the outer wall of the limiting rods 19. At the same time, the output end of the electric push rod 16 passes through the outer shell 18 and extends to the pressure plate 17. An injection port 22 is fixedly connected inside the outer shell 18. An insert plate 23 is fixedly connected to the bottom of the injection port 22. A slot 24 is opened at the top of the lower mold 3, and the insert plate 23 is inserted into the slot 24. An inner groove 12 is opened inside the base 1. Limiting plates 11 are fixedly connected to both sides below the top block 10, and the limiting plates 11 are slidably connected in the inner groove 12.

[0026] After the motor 5 starts, it drives the threaded rod 6 to rotate, causing the connecting block 7 to move smoothly in the horizontal direction. The inclined block 8 on the top of the connecting block 7 moves synchronously. When the inclined block 8 contacts the inclined block 9 at the bottom of the top block 10, under the action of the inclined surface, the top block 10 slides vertically upward along the inner hole 4 of the lower mold 3 under the guidance and constraint of the limiting plate 11 and the inner groove 12, and always remains parallel to the inner wall of the lower mold 3. At this time, the electric push rod 16 starts, pushing the pressure plate 17 down. The limiting rod 19, spring 21 and outer shell 18 on the pressure plate 17 move down synchronously. The insert plate 23 at the bottom of the outer shell 18 inserts into the slot 24 of the lower mold 3 first, completing the initial positioning of the mold. Subsequently, liquid rubber is injected into the lower mold 3 through the injection port 22. The electric push rod 16 is started again, the pressure plate 17 continues to press down, the spring 21 is compressed, providing a stable pressing force to shape the liquid rubber. After molding is completed, motor 5 starts again, and inclined block 8 further pushes inclined block 9. The top block 10 continues to move upward to smoothly eject the injection molded part. The entire mold removal process is efficient and smooth. Compared with the traditional manual mold removal method, it improves work efficiency, significantly shortens the production cycle of a single product, and reduces labor intensity.

[0027] Example 2: The difference between this example and Example 1 is that a pair of sliding grooves 13 are provided on the top of the base 1, and sliding plates 14 are fixedly connected to both outer walls of the lower mold 3, and the sliding plates 14 are slidably connected to the inside of the sliding grooves 13. A pair of pins 25 are provided on the outside of the base 1, and a pair of insertion holes 15 are provided inside the base 1, and the pins 25 are slidably connected to the inside of the insertion holes 15.

[0028] When installing the lower mold 3, simply align the two side slide plates 14 with the grooves 13 of the base 1 and slide them smoothly into place. The grooves 13 guide the mold for precise positioning. Then, quickly insert the pins 25 into the holes 15 of the base 1. The pins 25 then securely fix the lower mold 3 to the base 1. For disassembly, pull out the pins 25, and the slide plates 14 slide out along the grooves 13 in the opposite direction. The entire process requires no tools. Compared to traditional bolt fixing, this method improves installation efficiency and significantly reduces mold replacement time. It is particularly suitable for multi-variety, small-batch liquid rubber injection production scenarios, effectively improving the equipment's versatility and production flexibility.

[0029] Working principle: When using this liquid rubber injection molding device, the lower mold 3 is first slid into the groove 13 of the base 1 via the two side slide plates 14. The pin 25 is inserted and passes through the insertion hole 15 to fix the lower mold 3. Through their cooperation, the lower mold 3 can be quickly installed and disassembled, improving work efficiency. The motor 5 is started, which drives the threaded rod 6 to rotate, causing the threaded connecting block 7 to move horizontally. The inclined block 8 at the top of the connecting block 7 pushes the inclined block 9 at the bottom of the top block 10. Under the guidance of the limiting plate 11 and the inner groove 12, the top block 10 slides upward along the inner hole 4 of the lower mold 3 and remains parallel to the inner wall of the lower mold 3. At this time, the electric push rod 16 is started to push the pressure plate. When the pressure plate 17 is pressed down, the pressure plate 17, together with the limiting rod 19 and the spring 21, moves the outer shell 18 down together. At this time, the insert plate 23 at the bottom of the outer shell 18 will first insert into the slot 24. Then the electric push rod 16 stops working and adds liquid rubber into the lower mold 3 through the injection port 22. The electric push rod 16 is started again, which moves the pressure plate 17 down and presses the injection molded part into shape. The outer shell 18 is compressed by the elasticity of the spring 21. After the molding is completed, the motor 5 is started again, which pushes the first inclined block 8 upward to push the second inclined block 9, so that the top block 10 continues to move upward and ejects the injection molded part, thus facilitating mold removal. Through their cooperation, the effect of quick mold removal is achieved, which improves work efficiency.

[0030] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail (motor model: 39BYG001; electric actuator model: XTL100-500-24).

[0031] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. An apparatus for liquid rubber injection molding, characterized in that: The device includes a base (1), a motor (5) is fixedly connected to the outer wall of the base (1), a threaded rod (6) is fixedly connected to the output end of the motor (5), a connecting block (7) is threadedly connected to the outer wall of the threaded rod (6), a first inclined block (8) is fixedly connected to the top of the connecting block (7), a top block (10) is slidably connected inside the base (1), a second inclined block (9) is fixedly connected to the bottom of the top block (10), and the second inclined block (9) corresponds to the first inclined block (8). A lower mold (3) is provided above the base (1), an inner hole (4) is opened inside the lower mold (3), and the top block (10) is slidably connected inside the inner hole (4).

2. The apparatus for liquid rubber injection molding according to claim 1, characterized in that: A pair of sliding grooves (13) are provided on the top of the base (1). Slide plates (14) are fixedly connected to both outer walls of the lower mold (3), and the slide plates (14) are slidably connected to the inside of the sliding grooves (13). A pair of pins (25) are provided on the outside of the base (1). A pair of insertion holes (15) are provided inside the base (1), and the pins (25) are slidably connected to the inside of the insertion holes (15).

3. The apparatus for liquid rubber injection molding according to claim 2, characterized in that: The base (1) is fixedly connected to a bracket (2) at the top, and an electric push rod (16) is fixedly connected to the top of the bracket (2). A pressure plate (17) is fixedly connected to the output end of the electric push rod (16), and the pressure plate (17) corresponds to the slide groove (13).

4. The apparatus for liquid rubber injection molding according to claim 3, characterized in that: A pair of limiting rods (19) are fixedly connected to the top of the pressure plate (17). A limiting ring (20) is fixedly connected to the outer wall above the limiting rod (19), and a spring (21) is fixedly connected to the bottom wall of the limiting ring (20). A housing (18) is fixedly connected to the other end of the spring (21). The housing (18) is slidably connected to the outer wall of the limiting rod (19). At the same time, the output end of the electric push rod (16) passes through the housing (18) and extends to the pressure plate (17).

5. The apparatus for liquid rubber injection molding according to claim 4, characterized in that: An injection port (22) is fixedly connected inside the outer shell (18), and a plug plate (23) is fixedly connected to the bottom of the injection port (22). A slot (24) is opened on the top of the lower mold (3), and the plug plate (23) is inserted into the slot (24).

6. The apparatus for liquid rubber injection molding according to claim 5, characterized in that: The base (1) has an inner groove (12) inside. The two side walls below the top block (10) are fixedly connected to limit plates (11), and the limit plates (11) are slidably connected in the inner groove (12).

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