An injection molding cooling device for internal gears of printers

Abstract

The present invention proposes an injection molding cooling device for gears inside a printer, comprising a processing table, a top plate disposed above the processing table, the top plate being parallel to the processing table, columns fixedly connected to the four corners of the bottom of the top plate, the ends of the columns remote from the top plate being fixedly connected to the processing table, a forming punch parallel to the top plate, a hydraulic cylinder fixedly mounted on the top of the top plate, the piston of the hydraulic cylinder penetrating the top plate and fixedly connected to the forming punch; a forming die disposed below the forming punch, the hollow forming die having a heat dissipation cavity defined therein, and second joints fixedly mounted on both sides of the forming die. When in use, the present invention achieves multiple cooling of the molded part, effectively improving cooling efficiency, shortening the demolding cycle, and facilitating disassembly, assembly, maintenance, and replacement of the cooling elbow, thereby enhancing practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to an injection cooling device for an internal gear of a printer. Background Art

[0002] Plastic gears are made of plastic and are primarily used for mechanical transmission. They are widely used in various industries, including micromotors, electronics, automotive parts, home appliances, office supplies, toys, and crafts. In the production of printer gears, manufacturers often use injection molds. Existing injection molds accumulate a large amount of heat during the injection molding process. Traditional cooling methods mostly rely on natural cooling and cooling water immersion. The former is inefficient, resulting in long demolding times and significantly delaying production progress. The latter cannot evenly cool the molded part, significantly affecting molding quality. Furthermore, cooling water immersion can cause mold corrosion, shortening its service life and hindering the manufacturer's long-term development. To address these issues, we have proposed an injection cooling device for printer gears. Summary of the Invention

[0003] In order to solve the above deficiencies in the prior art, the present invention proposes an injection molding cooling device for an internal gear of a printer.

[0004] The technical solution of the present invention is achieved as follows: an injection molding cooling device for an internal gear of a printer, comprising a processing table, a top plate disposed above the processing table, the top plate being parallel to the processing table, columns fixedly connected to the four corners of the bottom of the top plate, the ends of the columns away from the top plate being fixedly connected to the processing table, a forming punch disposed below the top plate, the forming punch being parallel to the top plate, a hydraulic cylinder fixedly mounted on the top of the top plate, the piston column of the hydraulic cylinder penetrating the top plate and fixedly connected to the forming punch;

[0005] A forming die is arranged below the forming punch, and the forming die is hollow in design. A heat dissipation cavity is opened in the forming die, and a second joint is fixedly installed on both sides of the forming die, and the second joint is communicated with the inside of the heat dissipation cavity. A disc is coaxially arranged at the bottom of the forming die, and the disc is installed on the processing table. A boss is coaxially arranged on the top of the disc, and a plurality of support rods are arranged on the top of the boss, and the support rods are parallel to the axis of the boss, and the plurality of support rods are distributed circumferentially along the edge of the boss. A cooling elbow is arranged between the support rods, and the outer surface of the cooling elbow is fixedly connected to the support rods. A first joint is fixedly connected on both sides of the disc, and the first joint is respectively connected to the water inlet and the water outlet of the cooling elbow.

[0006] Preferably, pillars are fixedly connected to the four corners of the bottom of the processing table, connecting rods are provided between the pillars, and the connecting rods are fixedly connected to the pillars at both ends.

[0007] Preferably, a plurality of guide rods are provided on the top of the forming punch, the guide rods are parallel to the axis of the forming punch, and the plurality of guide rods are distributed circumferentially along the edge of the forming punch, one end of the guide rod passes through the outside of the top plate, and the other end of the guide rod is fixedly connected to the forming punch.

[0008] Preferably, an injection cavity is opened in the raised portion of the molding punch, discharge holes are opened at equal intervals at the bottom of the injection cavity, a feed channel is provided at the top of the injection cavity, a third joint is fixedly connected to one side of the molding punch, and the third joint is connected to the inside of the injection cavity through the feed channel.

[0009] Preferably, a plurality of connecting seats are fixedly installed on the outer surface of the forming die, fastening bolts are coaxially arranged inside the connecting seats, screw holes corresponding to the fastening bolts are opened on the top of the processing table, and the threaded portion of the fastening bolts passes through the disc and is connected to the screw holes.

[0010] Preferably, a fixing groove is coaxially provided on the boss, a cooling fan is fixedly installed in the fixing groove, and a ventilation groove corresponding to the fixing groove is opened on the top of the processing table, and the ventilation groove is connected to the inside of the fixing groove.

[0011] Compared with the prior art, the present invention, when in use, utilizes the second joint to circulate external cooling water into the heat dissipation cavity, thereby cooling the to-be-molded part in the forming die in all directions; utilizes the cooling elbow to be in close contact with the outside of the heat dissipation cavity, and then circulates cooling water inside the cooling elbow through the first joint to accelerate the dissipation of heat in the heat dissipation cavity, thereby realizing multiple cooling of the to-be-molded part, effectively improving the cooling efficiency, shortening the demolding cycle, and by providing a connecting seat, fastening bolts and screw holes, it is convenient for staff to disassemble, maintain and replace the cooling elbow, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a schematic structural diagram of an injection molding cooling device for internal gears of a printer proposed by the present invention.

[0014] Figure 2 This is a schematic diagram of the specific structure of the molding die, disc and processing table of the injection molding cooling device for the internal gear of a printer proposed by the present invention.

[0015] Figure 3 This is a schematic diagram of the internal structure of a molding die of an injection molding cooling device for an internal gear of a printer proposed by the present invention.

[0016] Figure 4 This is a schematic diagram of the internal structure of a molding punch of an injection molding cooling device for an internal gear of a printer proposed by the present invention.

[0017] In the figure: 1. Processing table; 2. Top plate; 3. Column; 4. Forming punch; 5. Hydraulic cylinder; 6. Forming die; 7. Connecting seat; 8. Disc; 9. Fastening bolts; 10. Boss; 11. Support rod; 12. Cooling elbow; 13. First joint; 14. Fixing groove; 15. Cooling fan; 16. Screw hole; 17. Ventilation groove; 18. Cooling cavity; 19. Second joint; 20. Injection cavity; 21. Discharge hole; 22. Third joint; 23. Feed channel; 24. Support; 25. Guide rod; 26. Connecting rod. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] See also Figure 1-4 The present invention provides a technical solution: an injection molding cooling device for gears inside a printer, comprising a processing table 1, a top plate 2 is provided above the processing table 1, the top plate 2 is parallel to the processing table 1, four corners of the bottom of the top plate 2 are fixedly connected to columns 3, one end of the column 3 away from the top plate 2 is fixedly connected to the processing table 1, a forming punch 4 is provided below the top plate 2, the forming punch 4 is parallel to the top plate 2, a hydraulic cylinder 5 is fixedly installed on the top of the top plate 2, a piston column of the hydraulic cylinder 5 passes through the top plate 2 and is fixedly connected to the forming punch 4, the hydraulic cylinder 5 is used to drive the forming punch 4 to move up and down, and then cooperate with the forming die 6 to facilitate the injection molding work;

[0020] A forming die 6 is provided below the forming convex die 4. The forming die 6 is hollow in design. A heat dissipation cavity 18 is provided in the forming die 6. Second joints 19 are fixedly installed on both sides of the forming die 6. The second joint 19 is connected to the inside of the heat dissipation cavity 18. A disc 8 is coaxially provided at the bottom of the forming die 6. The disc 8 is installed on the processing table 1. A boss 10 is coaxially provided on the top of the disc 8. A plurality of support rods 11 are provided on the top of the boss 10. The support rods 11 are parallel to the axis of the boss 10, and the plurality of support rods 11 are distributed circumferentially along the edge of the boss 10. A cooling elbow 12 is provided between the support rods 11. The outer surface of the cooling elbow 12 It is fixedly connected to the support rod 11, and a first joint 13 is fixedly connected on both sides of the disc 8. The first joint 13 is respectively connected to the water inlet and the water outlet of the cooling elbow 12. The second joint 19 is used to circulate external cooling water into the heat dissipation cavity 18, so as to cool the to-be-molded part in the forming die 6 in all directions. By setting the cooling elbow 12 to be tightly attached to the outer side of the heat dissipation cavity 18, and then using the first joint 13 to circulate cooling water inside the cooling elbow 12, the heat dissipation in the heat dissipation cavity 18 is accelerated, thereby realizing multiple cooling of the to-be-molded part, effectively improving the cooling efficiency and shortening the demoulding cycle.

[0021] Furthermore, the four corners of the bottom of the processing table 1 are fixedly connected to pillars 24, and connecting rods 26 are provided between the pillars 24. The connecting rods 26 are fixedly connected to the pillars 24 at both ends. The pillars 24 are used to support the processing table 1 and its connecting parts. By providing the connecting rods 26, the supporting strength of the pillars 24 is enhanced, and the stability of the structure is improved.

[0022] Furthermore, a plurality of guide rods 25 are provided on the top of the forming punch 4. The guide rods 25 are parallel to the axis of the forming punch 4, and the plurality of guide rods 25 are distributed circumferentially along the edge of the forming punch 4. One end of the guide rod 25 passes through the outside of the top plate 2, and the other end of the guide rod 25 is fixedly connected to the forming punch 4. By providing the guide rods 25, the forming punch 4 will not deviate when it is moved up and down, thereby further improving the stability of the structure.

[0023] Furthermore, an injection cavity 20 is opened in the raised part of the molding punch 4, and discharge holes 21 are intermittently and evenly spaced at the bottom of the injection cavity 20. A feed channel 23 is provided at the top of the injection cavity 20. A third joint 22 is fixedly connected to one side of the molding punch 4. The third joint 22 is connected to the inside of the injection cavity 20 through the feed channel 23, and is connected to the discharge pipe of the external injection molding machine through the third joint 22. The material is passed into the injection cavity 20 and then passed out through the discharge hole 21 into the molding die 6, thereby realizing the injection molding work.

[0024] Furthermore, a plurality of connecting seats 7 are fixedly installed on the outer surface of the forming die 6, and a fastening bolt 9 is coaxially arranged inside the connecting seat 7. A screw hole 16 corresponding to the fastening bolt 9 is opened on the top of the processing table 1, and the threaded portion of the fastening bolt 9 passes through the disc 8 and is connected to the screw hole 16. By providing the connecting seat 7, the fastening bolt 9 and the screw hole 16, it is convenient to disassemble and assemble the forming die 6 and the disc 8, and it is convenient for the staff to inspect and maintain the interior.

[0025] Furthermore, a fixing groove 14 is coaxially provided on the boss 10, and a cooling fan 15 is fixedly installed in the fixing groove 14. A ventilation groove 17 corresponding to the fixing groove 14 is provided on the top of the processing table 1. The ventilation groove 17 is connected to the inside of the fixing groove 14. The cooling fan 15 in the fixing groove 14 is used to discharge the heat accumulated in the forming die 6 through the ventilation groove 17, thereby further improving the cooling effect.

[0026] Specifically, when the present invention is in use, the staff first connects the third joint 22 to the discharge pipe of the injection molding machine, and then connects the first joint 13 and the second joint 19 to the external cooling water source, and then starts the hydraulic cylinder 5 to drive the forming punch 4 downward to contact the forming die 6, and the material passes through the feed channel 23 and the injection cavity 20 and out through the discharge hole 21, thereby realizing the injection molding work, and then starts the external water pump to respectively pass the cooling water source into the heat dissipation cavity 18 and the cooling elbow 12. Under the circulation flow of the cooling water source, the heat is quickly dissipated, thereby realizing multiple cooling of the molded parts.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding cooling device for an internal gear of a printer, comprising a processing table (1), characterized in that: A top plate (2) is provided above the processing table (1), the top plate (2) is parallel to the processing table (1), four corners of the bottom of the top plate (2) are fixedly connected to columns (3), one end of the column (3) away from the top plate (2) is fixedly connected to the processing table (1), a forming punch (4) is provided below the top plate (2), the forming punch (4) is parallel to the top plate (2), a hydraulic cylinder (5) is fixedly installed on the top of the top plate (2), and the piston column of the hydraulic cylinder (5) passes through the top plate (2) and is fixedly connected to the forming punch (4); A forming die (6) is provided below the forming convex die (4), the forming die (6) is of hollow design, a heat dissipation cavity (18) is provided in the forming die (6), second joints (19) are fixedly installed on both sides of the forming die (6), the second joints (19) are connected to the inside of the heat dissipation cavity (18), a disc (8) is coaxially provided at the bottom of the forming die (6), the disc (8) is installed on the processing table (1), and a boss (10) is coaxially provided on the top of the disc (8). A plurality of support rods (11) are provided on the top of the boss (10), the support rods (11) are parallel to the axis of the boss (10), and the plurality of support rods (11) are distributed circumferentially along the edge of the boss (10), a cooling bend (12) is provided between the support rods (11), the outer surface of the cooling bend (12) is fixedly connected to the support rods (11), and first joints (13) are fixedly connected to both sides of the disc (8), and the first joints (13) are respectively connected to the water inlet and the water outlet of the cooling bend (12); A plurality of guide rods (25) are provided on the top of the forming punch (4), the guide rods (25) are parallel to the axis of the forming punch (4), and the plurality of guide rods (25) are distributed circumferentially along the edge of the forming punch (4), one end of the guide rod (25) passes through the outside of the top plate (2), and the other end of the guide rod (25) is fixedly connected to the forming punch (4); An injection cavity (20) is provided in the raised portion of the forming convex mold (4), discharge holes (21) are provided at intervals and equal intervals at the bottom of the injection cavity (20), a feed channel (23) is provided at the top of the injection cavity (20), and a third joint (22) is fixedly connected to one side of the forming convex mold (4), and the third joint (22) is communicated with the interior of the injection cavity (20) through the feed channel (23).

2. The injection molding cooling device for the internal gear of the printer according to claim 1, characterized in that: The four corners of the bottom of the processing table (1) are fixedly connected to pillars (24), connecting rods (26) are provided between the pillars (24), and the connecting rods (26) are fixedly connected to the pillars (24) at both ends.

3. The injection molding cooling device for the internal gear of the printer according to claim 1, characterized in that: A plurality of connecting seats (7) are fixedly mounted on the outer surface of the forming die (6), a fastening bolt (9) is coaxially arranged inside the connecting seat (7), a screw hole (16) corresponding to the fastening bolt (9) is opened on the top of the processing table (1), and the threaded portion of the fastening bolt (9) passes through the disc (8) and is connected to the screw hole (16).

4. The injection molding cooling device for the internal gear of a printer according to claim 1, characterized in that: A fixing groove (14) is coaxially provided on the boss (10), a cooling fan (15) is fixedly installed in the fixing groove (14), and a ventilation groove (17) corresponding to the fixing groove (14) is provided on the top of the processing table (1), and the ventilation groove (17) is communicated with the interior of the fixing groove (14).

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