High-precision transmission gear injection mold

Abstract

The utility model discloses a high-precision transmission gear injection mold, relates to the technical field of gear injection molds, and aims to solve the problems that injection molding of plastic products is difficult due to the fact that mold scales are not cleaned for a long time and an injection molding opening is easy to block, and the mold scales may be adhered to the products to influence the appearance and cause the product quality. The device comprises a fixed die and a movable die, and the fixed die is arranged at the front end of the movable die; the mold cavity is integrally formed in the fixed mold, an injection molding pipe is arranged at the upper end of the fixed mold and communicates with the interior of the mold cavity, a cutting pipe is integrally formed on one side of the exterior of the injection molding pipe and communicates with the interior of the injection molding pipe, and an ejector rod is movably arranged at the front end of the cutting pipe; the front end of the ejector rod is in an arc shape, the ejector rod can penetrate through the cutting pipe to extend into the injection molding pipe, a water inlet pipe is arranged at the rear end of the ejector rod, and the water inlet pipe communicates with a nozzle at the front end of the ejector rod.

Description

Technical Field

[0001] The utility model relates to the technical field of gear injection molds, in particular to a high-precision transmission gear injection mold. Background Art

[0002] At present, molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material.

[0003] Usually, after the gear mold is injected, a layer of mold scale will be generated on the surface of the mold. The generation of mold scale is related to both materials and processes. The components of mold scale are small molecule additives such as flame retardants and lubricants, and may also be oligomers caused by thermal degradation. If the mold scale is not cleaned for a long time, it is easy to block the injection port, causing difficulties in injection molding of plastic products. It may also adhere to the product and affect the appearance. As a foreign body contamination, it may also affect the electrical performance of the product. Therefore, we proposed a high-precision transmission gear injection mold to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a high-precision injection mold for transmission gears, so as to solve the problem in the above-mentioned background technology that if the mold deposit is not cleaned for a long time, the injection port is easily blocked, which makes it difficult to inject plastic products, and the mold deposit may also adhere to the product and affect the appearance. As a foreign body contamination, it may also affect the electrical performance of the product.

[0005] To achieve the above object, the utility model provides the following technical solutions: a high-precision transmission gear injection mold, comprising a fixed mold and a movable mold, wherein the fixed mold is arranged at the front end of the movable mold;

[0006] Also includes:

[0007] A mold cavity is integrally formed and arranged inside a fixed mold; an injection molding tube is arranged at the upper end of the fixed mold, and the injection molding tube is connected to the mold cavity; a cutting tube is integrally formed on one side of the outside of the injection molding tube, and the cutting tube is connected to the inside of the injection molding tube; a push rod is movably arranged at the front end of the cutting tube, the front end of the push rod is arranged in an arc shape, and the push rod can pass through the cutting tube and extend to the inside of the injection molding tube; a water inlet pipe is arranged at the rear end of the push rod, and the water inlet pipe is connected to the nozzle at the front end of the push rod;

[0008] A through hole is integrally formed and arranged at the lower part of the interior of the fixed mold, and the through hole is connected to the interior of the mold cavity. An electric push rod is fixed to the inner bottom end of the through hole, and the electric push rod is engaged in the interior of the through hole. A telescopic rod is arranged at the upper end of the electric push rod, and a closing cover is arranged at the upper end of the telescopic rod. The shape of the upper end of the closing cover is consistent with the shape of the bottom of the mold cavity, and the electric push rod drives the telescopic rod to drive the closing cover to move up and down. A drainage groove is arranged on one side of the through hole, and the drainage groove is connected to the bottom of the fixed mold, and a water outlet pipe is arranged at the other end of the drainage groove.

[0009] Preferably, a screw is provided on one side of the front end of the fixed mold, and the screw is driven by a motor. A threaded hole is provided on one side of the surface of the movable mold, and the screw is threadedly connected to the threaded hole, and the movable mold moves back and forth at the front end of the fixed mold through the rotation of the screw. A sliding rod is provided on the front end surface of the fixed mold, and two sliding rods are symmetrically provided. A circular hole is provided on the front end surface of the movable mold, and the sliding rod is slidably engaged with the circular hole.

[0010] Preferably, a one-way plate is provided at the connection between the cutting tube and the injection tube, the one-way plate is opened and closed at the connection between the cutting tube and the injection tube through a connecting piece, and a return spring is provided inside the connecting piece.

[0011] Preferably, a fixing block is provided on one side of the injection molding tube, the fixing block is located at the front end of the cutting tube, and the ejector rod is movably engaged inside the fixing block, and the fixing block is fixed to one side of the injection molding tube by a fixing rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. An injection tube is arranged at the upper end of the fixed mold, and a cutting tube is arranged on one side of the injection tube. The cutting tube is connected to the inside of the injection tube, and a retractable ejector rod is arranged at the front end of the cutting tube. The water inlet pipe is connected to the ejector rod. After the injection molding of the gear mold is completed, the molded gear can be taken out, and then the mold is closed again. The ejector rod is extended from the cutting tube into the inside of the injection tube, and the one-way plate inside the injection tube is opened, and cleaning liquid is poured into the inside of the mold cavity, so as to clean the mold cavity and the water outlet to prevent mold scale from slowly accumulating too much and affecting the accuracy of gear molding.

[0014] 2. By setting a through hole at the bottom of the mold cavity and setting an electrically driven closing cover inside the through hole, the closing cover has the same shape and structure as the bottom of the mold cavity. When the gear is injection molded, the through hole can be closed, and then the cleaning liquid can be poured in to move the closing cover downward to expose the drainage groove on one side, so that the cleaning liquid can be connected to the mold scale and discharged from the drainage groove together. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is the front view of the fixed mold structure of the utility model;

[0017] Figure 3 It is an enlarged view of the structure at A of the utility model;

[0018] Figure 4 It is an enlarged view of the structure at B of the utility model;

[0019] In the figure: 1. fixed mold; 2. mold cavity; 3. sliding rod; 4. screw; 5. motor; 6. threaded hole; 7. round hole; 8. movable mold; 9. injection tube; 10. cutting tube; 11. through hole; 12. closing cover; 13. electric push rod; 14. telescopic rod; 15. drainage trough; 16. water outlet pipe; 17. one-way plate; 18. fixed rod; 19. ejector rod; 20. water inlet pipe; 21. fixed block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-4 , the utility model provides an embodiment: a high-precision transmission gear injection mold, comprising a fixed mold 1 and a movable mold 8, the fixed mold 1 is arranged at the front end of the movable mold 8;

[0022] Also includes:

[0023] The mold cavity 2 is integrally formed and arranged inside the fixed mold 1. An injection tube 9 is arranged at the upper end of the fixed mold 1, and the injection tube 9 is connected to the inside of the mold cavity 2. A cutting tube 10 is integrally formed on the outer side of the injection tube 9, and the cutting tube 10 is connected to the inside of the injection tube 9. A push rod 19 is movably arranged at the front end of the cutting tube 10. The front end of the push rod 19 is arranged in an arc shape, and the push rod 19 can pass through the cutting tube 10 and extend to the inside of the injection tube 9. A water inlet pipe 20 is arranged at the rear end of the push rod 19, and the water inlet pipe 20 is connected to the nozzle at the front end of the push rod 19.

[0024] The through hole 11 is integrally formed and arranged at the lower part of the interior of the fixed mold 1, and the through hole 11 is connected to the interior of the mold cavity 2. An electric push rod 13 is fixed to the bottom end of the interior of the through hole 11, and the electric push rod 13 is engaged in the interior of the through hole 11. A telescopic rod 14 is arranged at the upper end of the electric push rod 13, and a closing cover 12 is arranged at the upper end of the telescopic rod 14. The shape of the upper end of the closing cover 12 is consistent with the shape of the bottom of the mold cavity 2, and the electric push rod 13 drives the telescopic rod 14 to drive the closing cover 12 to move up and down. A drainage groove 15 is arranged on one side of the through hole 11, and the drainage groove 15 is connected to the bottom of the fixed mold 1, and a water outlet pipe 16 is arranged at the other end of the drainage groove 15.

[0025] After the injection molding of the gear mold is completed, the molded gear can be taken out, and then the mold can be closed again, and the push rod 19 is extended from the cutting tube 10 into the interior of the injection tube 9, and the one-way plate 17 inside the injection tube 9 is pushed open, and cleaning liquid is poured into the interior of the mold cavity 2 to clean the mold cavity 2 and the water outlet. Then, the closing cover 12 can be moved downward to expose the drainage groove 15 on one side, so that the cleaning liquid can be connected with the mold scale and discharged from the drainage groove 15 together.

[0026] See also Figure 1 A screw rod 4 is provided on one side of the front end of the fixed mold 1, and the screw rod 4 is driven by a motor 5. A threaded hole 6 is provided on one side of the surface of the movable mold 8. The screw rod 4 is threadedly connected to the threaded hole 6, and the movable mold 8 moves back and forth at the front end of the fixed mold 1 through the rotation of the screw rod 4. A sliding rod 3 is provided on the front end surface of the fixed mold 1, and two sliding rods 3 are symmetrically provided. A circular hole 7 is provided on the front end surface of the movable mold 8, and the sliding rod 3 is slidably engaged with the circular hole 7, so as to close the mold between the movable mold 8 and the fixed mold 1.

[0027] See also Figure 3 A one-way plate 17 is provided at the connection between the cutting tube 10 and the injection tube 9. The one-way plate 17 is opened and closed at the connection between the cutting tube 10 and the injection tube 9 through a connecting piece, and a return spring is provided inside the connecting piece. The one-way plate 17 can seal between the cutting tube 10 and the injection tube 9.

[0028] See also Figure 3 A fixing block 21 is provided on one side of the injection tube 9, the fixing block 21 is located at the front end of the cutting tube 10, and the ejector rod 19 is movably engaged inside the fixing block 21, and the fixing block 21 is fixed to one side of the injection tube 9 by the fixing rod 18, so as to fix the ejector rod 19.

[0029] Working principle: After the gear injection molding is completed, the gear is first taken out of the mold cavity 2, and then the movable mold 8 is closed again, the push rod 19 is manually inserted into the interior of the cutting tube 10, and the front end of the push rod 19 is used to push open the one-way plate 17, so that the front end of the push rod 19 extends to the interior of the injection tube 9, and then the cleaning liquid is injected into the push rod 19 through the water inlet pipe 20, and sprayed out from the nozzle at the front end of the push rod 19. The cleaning liquid flows into the mold cavity 2 along the injection tube 9, cleans the mold scale inside the mold cavity 2, and brings the mold scale into the interior of the through hole 11. At the same time, the electric push rod 13 is started, and the closing cover 12 is moved downward to expose the drain groove 15, so that the cleaning liquid and the mold scale flow from the drain groove 15 into the water outlet pipe 16 for discharge.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-precision transmission gear injection mold, comprising a fixed mold (1) and a movable mold (8), wherein the fixed mold (1) is arranged at the front end of the movable mold (8); Features: Also includes: A mold cavity (2) is integrally formed and arranged inside a fixed mold (1); an injection molding tube (9) is arranged at the upper end of the fixed mold (1), and the injection molding tube (9) is connected to the inside of the mold cavity (2); a cutting tube (10) is integrally formed on the outer side of the injection molding tube (9), and the cutting tube (10) is connected to the inside of the injection molding tube (9); a push rod (19) is movably arranged at the front end of the cutting tube (10); the front end of the push rod (19) is arranged in an arc shape, and the push rod (19) can pass through the cutting tube (10) and extend to the inside of the injection molding tube (9); a water inlet pipe (20) is arranged at the rear end of the push rod (19), and the water inlet pipe (20) is connected to a nozzle at the front end of the push rod (19); A through hole (11) is integrally formed and arranged at the lower part of the interior of the fixed mold (1), and the through hole (11) is connected to the interior of the mold cavity (2). An electric push rod (13) is fixed to the bottom end of the interior of the through hole (11), and the electric push rod (13) is engaged in the interior of the through hole (11). A telescopic rod (14) is arranged at the upper end of the electric push rod (13), and a closing cover (12) is arranged at the upper end of the telescopic rod (14). The shape of the upper end of the closing cover (12) is consistent with the shape of the bottom of the mold cavity (2), and the electric push rod (13) drives the telescopic rod (14) to drive the closing cover (12) to move up and down. A drainage groove (15) is arranged on one side of the through hole (11), and the drainage groove (15) is connected to the bottom of the fixed mold (1), and a water outlet pipe (16) is arranged at the other end of the drainage groove (15).

2. A high-precision transmission gear injection mold according to claim 1, characterized in that: A screw rod (4) is provided on one side of the front end of the fixed mold (1), and the screw rod (4) is driven by a motor (5). A threaded hole (6) is provided on one side of the surface of the movable mold (8), and the screw rod (4) is threadedly connected to the threaded hole (6). The movable mold (8) moves forward and backward at the front end of the fixed mold (1) through the rotation of the screw rod (4). A sliding rod (3) is provided on the front end surface of the fixed mold (1), and two sliding rods (3) are symmetrically provided. A circular hole (7) is provided on the front end surface of the movable mold (8), and the sliding rod (3) is slidably engaged with the circular hole (7).

3. A high-precision transmission gear injection mold according to claim 1, characterized in that: A one-way plate (17) is provided at the connection between the cutting tube (10) and the injection tube (9); the one-way plate (17) is opened and closed at the connection between the cutting tube (10) and the injection tube (9) through a connecting piece, and a return spring is provided inside the connecting piece.

4. The high-precision transmission gear injection mold according to claim 1, characterized in that: A fixing block (21) is provided on one side of the injection tube (9), the fixing block (21) is located at the front end of the cutting tube (10), and the push rod (19) is movably engaged inside the fixing block (21), and the fixing block (21) is fixed to one side of the injection tube (9) by a fixing rod (18).

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