Injection device of injection molding machine for rubber product production

Abstract

The utility model relates to the technical field of rubber injection molding machines, and provides an injection device of an injection molding machine for rubber product production, which comprises an injection cylinder and a mounting base, and further comprises a sleeve rod, a threaded sleeve is rotatably mounted at the left end of the sleeve rod, a threaded rod is movably arranged on the left side in the sleeve rod, and the threaded rod is in threaded connection with the threaded sleeve; the piston is mounted in the syringe in a sliding manner; by means of the technical scheme, the problems that in the prior art, an injection device drives the injection piston to move through rotation of the rotating disc to achieve injection operation, due to the fact that the rotating speed of the rotating disc is constant, when rotation of the rotating disc is converted into linear motion of the injection piston, the moving speed of the injection piston changes continuously, and the injection efficiency is affected are solved. And meanwhile, the problems that an injection piston in the device cannot be replaced, the injection piston is abraded after being used for a long time, and the injection operation is influenced when the injection piston is not replaced in time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber injection molding machines, and specifically, to an injection device of an injection molding machine for rubber product production. Background Art

[0002] An injection molding machine, also known as an injection molding press or injection molding equipment, is the main equipment that injects thermoplastic or thermosetting materials into a mold under a certain pressure after heating, melting and maintaining a flowing state, and forms plastic products with the required shapes after cooling and shaping. Its working principle is similar to that of a syringe used for injection. With the thrust of a screw (or plunger), the molten plastic in a plasticized state is injected into a closed mold cavity, and the product is obtained after curing and shaping.

[0003] The patent with the publication number of CN 216442994 U discloses an injection device of a plastic injection molding machine, including a mounting base and an injection barrel. A driving motor is installed on the top of the mounting base, a rotating disk is installed at the top end of the output end of the driving motor, a strip-shaped sliding groove is formed on the top of the rotating disk, an adjusting moving block is slidably installed in the strip-shaped sliding groove, a linkage rotating column is installed on the top of the adjusting moving block, an injection piston is slidably installed in the injection barrel, and an injection connecting rod is installed on the side of the injection piston. The above injection device drives the injection piston to move through the rotation of the rotating disk to realize the injection operation. Since the rotation speed of the rotating disk is constant, when the rotation of the rotating disk is converted into the linear motion of the injection piston, the moving speed of the injection piston will continuously change. Therefore, it will cause uneven injection and affect the injection effect. At the same time, the injection piston in the above device cannot be replaced. The injection piston will be worn after long-term use, and if it is not replaced in time, it will affect the injection operation. Summary of the Utility Model

[0004] The utility model provides an injection device of an injection molding machine for rubber product production, which solves the problems in the related art that the injection device drives the injection piston to move through the rotation of the rotating disk to realize the injection operation. Since the rotation speed of the rotating disk is constant, when the rotation of the rotating disk is converted into the linear motion of the injection piston, the moving speed of the injection piston will continuously change. Therefore, it will cause uneven injection and affect the injection effect. At the same time, the injection piston in the above device cannot be replaced. The injection piston will be worn after long-term use, and if it is not replaced in time, it will affect the injection operation.

[0005] The technical solution of the utility model is as follows:

[0006] An injection device of an injection molding machine for rubber product production, including an injection barrel and a mounting base, further including:

[0007] A sleeve rod, a threaded sleeve is rotatably installed at the left end of the sleeve rod, a threaded rod is movably arranged on the left side inside the sleeve rod, and the threaded rod is screwed with the threaded sleeve;

[0008] A piston, the piston is slidably installed in the syringe barrel, and the threaded rod is detachably and fixedly connected to the piston;

[0009] A reciprocating lead screw, the reciprocating lead screw is installed on the right side inside the sleeve rod, a first mounting plate is screwed on the reciprocating lead screw, the first mounting plate is fixedly connected to the sleeve rod, a second mounting plate is rotatably installed at the left end of the reciprocating lead screw, and the second mounting plate is fixed above the mounting base through a support rod;

[0010] A vertical plate, a driving motor is fixed at the top of the right wall of the vertical plate, the power shaft of the driving motor passes through the vertical plate through a bearing and is fixedly connected to the right end of the reciprocating lead screw, and guide shafts are symmetrically fixed between the vertical plate and the second mounting plate, and the guide shafts slidably penetrate the first mounting plate.

[0011] Preferably, a lead screw nut is fixed at the central position of the first mounting plate, and the lead screw nut is screwed with the reciprocating lead screw.

[0012] Preferably, a guide groove is formed through the right side of the sleeve rod, the second mounting plate is slidably installed in the guide groove, and the first mounting plate is fixed at the right end of the guide groove.

[0013] Preferably, a threaded cap is screwed on the right side of the syringe barrel, and the threaded rod slidably penetrates the threaded cap.

[0014] Preferably, a through groove is formed at the central position of the threaded cap, and the diameter of the through groove is larger than the outer diameter of the sleeve rod.

[0015] Preferably, an installation cylinder is fixed at the central position of the right wall of the piston, and the left end of the threaded rod is inserted into the installation cylinder.

[0016] Preferably, a limiting plate is fixed on the left side of the threaded rod, a screw sleeve is sleeved on the outer side of the left side of the threaded rod, and the screw sleeve is screwed with the outer wall of the installation cylinder.

[0017] Preferably, the driving motor is a stepper motor or a servo motor.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, the driving motor drives the reciprocating lead screw to rotate, thereby driving the piston to work, enabling the piston to move at a constant speed, ensuring uniform injection, improving injection quality. At the same time, the threaded rod is connected to the sleeve rod through the threaded sleeve, so the extension length of the threaded rod can be adjusted by rotating the threaded sleeve, and then the moving length of the piston can be controlled to realize the adjustment of the injection volume.

[0020] 2. The threaded nut provided in the utility model can be removed from the right side of the syringe barrel, so as to facilitate the removal of the piston. When the piston is severely worn after long-term use and needs to be replaced, rotate the screw sleeve to separate the screw sleeve from the mounting cylinder, and then directly pull out the threaded rod from the mounting cylinder, so as to remove the piston for replacement and ensure the injection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] Figure 1 is a three-dimensional view of the external structure of the present utility model;

[0023] Figure 2 is a three-dimensional view of the internal structure of the syringe barrel of the present utility model;

[0024] Figure 3 is a three-dimensional view of the structure at the top right of the mounting base of the present utility model;

[0025] Figure 4 is a three-dimensional view of the internal structure of the sleeve rod of the present utility model;

[0026] Figure 5 is a three-dimensional view of the structure at the connection position between the threaded rod and the piston of the present utility model.

[0027] In the figure: 1. Syringe barrel; 2. Mounting base; 3. Sleeve rod; 4. Threaded sleeve; 5. Threaded rod; 6. Piston; 7. Threaded nut; 8. Reciprocating lead screw; 9. First mounting plate; 10. Second mounting plate; 11. Vertical plate; 12. Driving motor; 13. Guide shaft; 14. Support rod; 15. Guide groove; 16. Mounting cylinder; 17. Limiting plate; 18. Screw sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0029] Embodiment 1

[0030] As Figures 1 to 4 shown, this embodiment proposes:

[0031] An injection device for an injection molding machine for producing rubber products, including a syringe barrel 1 and a mounting base 2, and further including:

[0032] The sleeve rod 3 is rotatably installed with a threaded sleeve 4 at the left end. Inside the left side of the sleeve rod 3, a threaded rod 5 is movably arranged, and the threaded rod 5 is threadedly connected to the threaded sleeve 4;

[0033] A piston 6 is slidably installed in the syringe barrel 1, and the threaded rod 5 is detachably and fixedly connected to the piston 6;

[0034] A reciprocating lead screw 8 is installed on the right side inside the sleeve rod 3. A first mounting plate 9 is threaded on the reciprocating lead screw 8. The first mounting plate 9 is fixedly connected to the sleeve rod 3. The left end of the reciprocating lead screw 8 is rotatably installed with a second mounting plate 10, and the second mounting plate 10 is fixed above the mounting base 2 through a support rod 14;

[0035] A vertical plate 11 has a driving motor 12 fixed to the top of the right wall. The power shaft of the driving motor 12 passes through the vertical plate 11 through a bearing and is fixedly connected to the right end of the reciprocating lead screw 8. Guide shafts 13 are symmetrically fixed between the vertical plate 11 and the second mounting plate 10, and the guide shafts 13 slidably penetrate the first mounting plate 9.

[0036] A lead screw nut is fixed at the center position of the first mounting plate 9, and the lead screw nut is threadedly connected to the reciprocating lead screw 8.

[0037] A guide groove 15 is formed through the right side of the sleeve rod 3. The second mounting plate 10 is slidably installed in the guide groove 15, and the first mounting plate 9 is fixed at the right end of the guide groove 15.

[0038] The driving motor 12 is a stepper motor or a servo motor.

[0039] In this embodiment, the driving motor 12 is set to drive the reciprocating lead screw 8 to rotate. The reciprocating lead screw 8 drives the sleeve rod 3 to move back and forth through the first mounting plate 9. The sleeve rod 3 drives the piston 6 to move back and forth through the threaded rod 5, so as to realize the injection operation of rubber. By setting the driving motor 12 to drive the reciprocating lead screw 8 to rotate, and thus drive the piston 6 to work, the piston 6 can move at a constant speed, ensuring uniform injection and improving the injection quality. At the same time, the threaded rod 5 is connected to the sleeve rod 3 through the threaded sleeve 4. Therefore, the extension length of the threaded rod 5 can be adjusted by rotating the threaded sleeve 4, and then the moving length of the piston 6 can be controlled to realize the adjustment of the injection volume. When it is necessary to adjust the extension length of the threaded rod 5, hold the threaded rod 5 with one hand to prevent the threaded rod 5 from deflecting when rotating the threaded sleeve 4, and rotate the threaded sleeve 4 with the other hand to drive the threaded rod 5 to move. The driving motor 12 adopts a stepper motor or a servo motor, which can control its own rotation speed, so as to adjust the injection rate and meet different injection requirements.

[0040] Embodiment 2

[0041] As Figures 2 to 5 shown, based on the same concept as the above Embodiment 1, this embodiment also proposes:

[0042] A threaded cap 7 is screwed to the right side of the syringe barrel 1, and the threaded rod 5 slides through the threaded cap 7.

[0043] A through groove is provided at the central position of the threaded cap 7, and the diameter of the through groove is larger than the outer diameter of the sleeve rod 3.

[0044] A mounting cylinder 16 is fixed at the central position of the right wall of the piston 6, and the left end of the threaded rod 5 is inserted into the mounting cylinder 16.

[0045] A limiting plate 17 is fixed on the left side of the threaded rod 5, and a screw sleeve 18 is sleeved on the outer part of the left side of the threaded rod 5. The screw sleeve 18 is screwed to the outer wall of the mounting cylinder 16.

[0046] In this embodiment, the provided threaded cap 7 can be removed from the right side of the syringe barrel 1, so as to facilitate the removal of the piston 6. When the piston 6 is severely worn after long-term use and needs to be replaced, the screw sleeve 18 is rotated so that the screw sleeve 18 is disengaged from the mounting cylinder 16, and then the threaded rod 5 is directly pulled out of the mounting cylinder 16, so as to remove the piston 6 for replacement. The installation process is opposite to the disassembly process.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection device of an injection molding machine for producing rubber products, comprising an injection cylinder (1) and a mounting base (2), characterized in that: Also includes: A sleeve rod (3), a threaded sleeve (4) being rotatably mounted on the left end of the sleeve rod (3), a threaded rod (5) being movably arranged on the left side inside the sleeve rod (3), and the threaded rod (5) being threadedly connected to the threaded sleeve (4); A piston (6), the piston (6) being slidably mounted in the injection barrel (1), the threaded rod (5) being detachably fixedly connected to the piston (6); a reciprocating screw (8), the reciprocating screw (8) being mounted on the right side inside the sleeve rod (3), a first mounting plate (9) being screwed onto the reciprocating screw (8), the first mounting plate (9) being fixedly connected to the sleeve rod (3), a second mounting plate (10) being rotatably mounted on the left end of the reciprocating screw (8), the second mounting plate (10) being fixed above the mounting base (2) via a support rod (14); A vertical plate (11), a driving motor (12) is fixed on the top of the right wall of the vertical plate (11), a power shaft of the driving motor (12) passes through the vertical plate (11) through a bearing and is fixedly connected to the right end of the reciprocating screw (8), a guide shaft (13) is symmetrically fixed between the vertical plate (11) and the second mounting plate (10), and the guide shaft (13) slides through the first mounting plate (9).

2. The injection device of an injection molding machine for producing rubber products according to claim 1, characterized in that: A lead screw nut is fixed at the center of the first mounting plate (9), and the lead screw nut is threadedly connected to the reciprocating lead screw (8).

3. The injection device of the injection molding machine for producing rubber products according to claim 1, characterized in that: A guide groove (15) is formed through the right side of the sleeve rod (3), the second mounting plate (10) is slidably mounted in the guide groove (15), and the first mounting plate (9) is fixed to the right end of the guide groove (15).

4. The injection device of an injection molding machine for producing rubber products according to claim 1, characterized in that: A threaded cap (7) is threadedly connected to the right side of the injection barrel (1), and the threaded rod (5) slides through the threaded cap (7).

5. The injection device of the injection molding machine for producing rubber products according to claim 4, characterized in that: A through slot is provided at the center of the threaded cap (7), and the diameter of the through slot is greater than the outer diameter of the sleeve rod (3).

6. The injection device of an injection molding machine for producing rubber products according to claim 1, characterized in that: A mounting cylinder (16) is fixed at the center of the right wall of the piston (6), and the left end of the threaded rod (5) is inserted into the mounting cylinder (16).

7. The injection device of the injection molding machine for producing rubber products according to claim 6, characterized in that: A limiting plate (17) is fixed on the left side of the threaded rod (5), and a threaded sleeve (18) is sleeved on the outside of the left side of the threaded rod (5), wherein the threaded sleeve (18) is threadedly connected to the outer wall of the mounting tube (16).

8. The injection device of an injection molding machine for producing rubber products according to claim 1, characterized in that: The driving motor (12) is a stepping motor or a servo motor.

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