Injection mold for gear parts

Abstract

The present invention relates to the technical field of injection molds, and specifically to an injection mold for a gear part, comprising a fixed mold base, the fixed mold base being provided with a molding groove, one side of the fixed mold base being connected to an injection molding device in communication with the molding groove; a movable mold base, the movable mold base being fixedly mounted with a molding protrusion, one side of the movable mold base being connected to a hydraulic drive device; a fixing mechanism being connected between the fixed mold base and the movable mold base for automatically fixing the movable mold base to the fixed mold base; when the movable mold base and the fixed mold base are engaged, the fixing mechanism fixes the movable mold base to the fixed mold base and automatically releases the fixing of the movable mold base to the fixed mold base after a set time. The present invention can automatically fix and separate the movable mold base to and from the fixed mold base through the provision of the fixing mechanism, eliminating the need for manual fixing and release of the movable mold base. This is not only convenient to operate, but also requires less manpower, thereby significantly reducing the use of injection molds and the processing costs of gear parts.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for a gear part. Background Art

[0002] Injection molding is a method of producing industrial products, usually by using thermoplastics or thermosetting materials to make plastic products of various shapes using plastic molding molds.

[0003] Plastic gear parts are mostly formed using injection molds. Existing injection molds for gear processing mainly include a movable mold and a fixed mold. When the movable mold and the fixed mold are in the clamped state, a cavity is formed between the movable mold and the fixed mold. After the rubber is squeezed into the cavity from the injection port, it is heated and vulcanized in the mold to achieve molding. Finally, the mold is opened to take out the final molded product. Due to the high injection pressure during the injection molding process, in order to avoid positional displacement of the movable mold during injection molding, it is necessary to fix the movable mold after clamping the mold and then release the fixation of the movable mold before opening the mold. At present, the movable mold is mostly fixed and released by manual control, which is not only cumbersome to operate, but also takes up a lot of manpower, thereby significantly increasing the use of injection molds and the processing cost of gear parts.

[0004] To this end, an injection mold for a gear part is proposed. Summary of the Invention

[0005] The object of the present invention is to provide an injection mold for a gear part, which can automatically fix the movable mold base to the fixed mold base and separate it from the fixed mold base through the setting of a fixing mechanism, without the need for manual fixing and releasing of the movable mold, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An injection mold for a gear part, comprising a fixed mold base, wherein the fixed mold base is provided with a molding groove, and one side of the fixed mold base is connected to an injection molding device in communication with the molding groove;

[0008] A movable die base, on which a forming protrusion is fixedly mounted, and one side of the movable die base is connected to a hydraulic drive device;

[0009] A fixing mechanism is connected between the fixed mold base and the movable mold base to automatically fix the movable mold base to the fixed mold base;

[0010] When the movable mold base and the fixed mold base are in mold closing, the fixing mechanism fixes the movable mold base to the fixed mold base for a set time and then automatically releases the fixation of the fixed mold base to the movable mold base.

[0011] Starting the hydraulic drive equipment can drive the movable mold base and the molding convex head to move back and forth in the horizontal direction. When the movable mold base is engaged with the fixed mold base and the molding convex head is inserted into the corresponding molding groove, the injection molding equipment can be started to perform injection molding. When the movable mold base and the fixed mold base are engaged, the fixing mechanism fixes the movable mold base to the fixed mold base, thereby preventing the position of the movable mold base from shifting due to excessive injection pressure during injection molding. After a set time, the fixation of the fixed mold base to the movable mold base is automatically released. At this time, the gear part has been formed in the molding groove, which makes it convenient for the hydraulic drive equipment to drive the movable mold base and the molding convex head to move to the side away from the fixed mold base and remove the molded gear part. The setting of the fixing mechanism can automatically fix the movable mold base to the fixed mold base and separate it from the fixed mold base. There is no need to manually fix and release the movable mold. It is not only easy to operate, but also occupies less manpower, thereby significantly reducing the use of injection molds and the processing cost of gear parts.

[0012] Preferably, the fixing mechanism includes a top seat fixedly mounted on the top wall of the fixed mold seat, a cylinder fixedly mounted on the top wall of the top seat, a piston rod fixedly mounted on the output end of the cylinder, a limiting plate mounted on the bottom end of the piston rod, and the bottom end of the limiting plate extends to the lower side of the top seat, a limiting groove cooperating with the limiting plate is provided on the top wall of the movable mold seat, a fixing block is fixedly mounted on the outer side wall of the movable mold seat close to the fixed mold seat, a piezoelectric ceramic piece cooperating with the fixing block is fixedly mounted on the outer side wall of the fixed mold seat close to the movable mold seat, and the piezoelectric ceramic piece is electrically connected to the cylinder, and a delay component is connected to the cylinder.

[0013] When the movable mold base and the fixed mold base are closed, the fixed block is pressed against one side of the top base and squeezes the piezoelectric ceramic piece. When the piezoelectric ceramic piece is squeezed, it will generate current and start the cylinder. When the power of the cylinder is too large, multiple piezoelectric ceramic pieces can be set to power the cylinder together. After the cylinder is started, it will drive the piston rod to drive the limit plate to move downward and insert the bottom end of the limit plate into the limit groove on the top wall of the movable mold base, so that the movable mold base can be fixedly connected to one side of the fixed mold base, thereby preventing the position of the movable mold base from shifting due to excessive injection pressure during injection molding. The delay component connected to the cylinder can control the power-on time of the cylinder. After the cylinder is powered off, the piston rod retracts and resets upward and drives the limit plate to move to the upper side of the limit groove, so that the hydraulic drive equipment can drive the movable mold base and the molding protrusion to move to the side away from the fixed mold base and remove the molded gear parts.

[0014] Preferably, the delay component includes a power connection block slidably installed in the fixed mold base, a slide groove cooperating with the power connection block is provided in the fixed mold base, a guide rod penetrating the power connection block is fixedly installed in the slide groove, a first electromagnet for attracting the power connection block to move upward is fixedly installed on the top wall inside the slide groove, and the piezoelectric ceramic piece is electrically connected to the first electromagnet, two connectors cooperating with the power connection block are symmetrically installed on the inner wall of the slide groove, and the two connectors are electrically connected to the cylinder, and the two connectors are electrically connected to the driving power supply.

[0015] When the piezoelectric ceramic piece is squeezed, it will generate current and energize the first electromagnet. When the first electromagnet is energized, it will generate magnetism and attract the power block to move upward until it contacts the bottom end of the first electromagnet. At this time, the power block connects the two connectors and connects the circuit connected to the cylinder. After the piezoelectric ceramic piece stops generating current, the power block will slide down along the side wall of the connector and the slide groove due to its own gravity. When the power block moves downward, it will continue to connect the two connectors. At this time, the driving power supply connected to the two connectors energizes the cylinder, so the cylinder can be continuously energized for the set time. When the power block slides to the bottom, it will disconnect from the two connectors and the driving power supply. At this time, the cylinder is completely powered off, and the cylinder can be automatically started and shut down without manual control. It has a high degree of automation and is easy to use.

[0016] Preferably, a mounting block is slidably installed in the fixed mold base, and two joints are fixedly installed on the bottom end of the mounting block. A movable groove that cooperates with the mounting block and the two joints is provided in the fixed mold base. A reciprocating screw rod that passes through the mounting block is rotatably installed in the movable groove, and the mounting block and the reciprocating screw rod are threadedly engaged with each other. The top end of the reciprocating screw rod extends to the upper side of the fixed mold base, and the top end of the fixed mold base is provided with a fixing component for fixing the reciprocating screw rod.

[0017] The mounting block and the reciprocating screw are threadedly engaged with each other, so when the reciprocating screw is rotated, the mounting block can drive the two joints to move up and down, thereby adjusting the length of the two joints in the slide groove, and the time for connecting the two joints when the power block moves downward can be adjusted, thereby adjusting the starting time of the cylinder. The starting time of the cylinder and the time for the fixed connection between the movable mold base and the fixed mold base can be adjusted according to the cooling time of the gear parts after injection molding. It has a wide range of applications and good use effect.

[0018] Preferably, the fixing assembly includes a fixing seat fixedly mounted on the top wall of the fixed mold seat, and the top end of the reciprocating screw extends to the upper side of the fixing seat, a turntable is slidably mounted on the top end of the reciprocating screw, a rectangular slider is fixedly mounted on the bottom wall of the turntable, and the bottom end of the rectangular slider is inserted into the top end of the reciprocating screw, a rectangular slide groove is provided in the reciprocating screw for cooperating with the rectangular slider, a plurality of positioning rods are elastically connected to the bottom wall of the turntable, and a plurality of positioning grooves that cooperate with the positioning rods are evenly provided on the top wall of the fixing seat.

[0019] Pull the turntable and positioning rod upward and pull the positioning rod to the upper side of the fixed seat. At this time, the turntable and positioning rod can be rotated freely. Due to the action of the rectangular slider, rotating the turntable and positioning rod can drive the reciprocating screw to rotate. After the rotation is completed, release the turntable. At this time, the turntable will move downward due to its own weight. After the bottom end of the part of the positioning rod is inserted into the positioning groove on the top wall of the fixed seat, the positioning rod, turntable and reciprocating screw can be prevented from rotating. The reciprocating screw can be rotated conveniently and the reciprocating screw can be fixed conveniently and quickly. It is easy to use.

[0020] Preferably, a first cavity is provided on the top of the fixed mold base, a first piston is slidably installed in the first cavity, a second cavity is provided in the fixed mold base, a second piston is slidably installed in the second cavity, a connecting pipe is connected to the opposite ends of the first cavity and the second cavity, a connecting rod is fixedly installed on the outer wall of one side of the mounting block, and the end of the connecting rod away from the mounting block is fixedly connected to the second piston, and a plurality of indicator lines that cooperate with the first piston are evenly arranged on the top wall of the fixed mold base, and the indicator lines are all located on the upper side of the first cavity.

[0021] When the mounting block drives the two joints to move upward, it will drive the connecting rod and the second piston to move upward. When the second piston moves upward, the gas in the second chamber can be injected into the first chamber through the connecting pipe and push the first piston to move toward the end away from the second chamber. When the mounting block drives the two joints to move downward, it will drive the connecting rod and the second piston to move downward. When the second piston moves downward, the gas in the first chamber can be sucked into the second chamber through the connecting pipe and pull the first piston to move toward the end close to the second chamber. The movement of the first piston in the first chamber and the position of the first piston can be intuitively observed through the indicator line, which makes it easy to quickly understand the positions of the mounting block and the two joints, thereby further facilitating the adjustment of the starting time of the cylinder.

[0022] Preferably, the bottom end of the piston rod is connected to a fixed plate, and a limit plate is fixedly installed on the bottom end of the fixed plate, a lifting groove that cooperates with the fixed plate is opened in the top seat, a limit slider is fixedly installed on the bottom end of the piston rod, and a limit groove that cooperates with the limit slider is opened in the fixed plate.

[0023] The limiting plate and the fixing plate are slidably connected to the bottom end of the piston rod, so the limiting plate and the fixing plate will not act on the piston rod after being subjected to a lateral thrust, thereby preventing the piston rod from bending and breaking after being subjected to a lateral force.

[0024] Preferably, the bottom wall of the limiting plate close to the fixed mold base is an inclined surface.

[0025] This makes it easier for the limiting plate to be inserted into the limiting groove on the top wall of the movable mold base when it moves downward.

[0026] Preferably, a plurality of second electromagnets cooperating with the movable mold base are evenly installed in the fixed mold base, the second electromagnets are electrically connected to the cylinder, and the second electromagnets are located on the side close to the movable mold base, a plurality of annular cooling grooves are evenly opened in the fixed mold base, and the annular cooling grooves are evenly arranged on the outside of the second electromagnets, and the annular cooling grooves are commonly connected to a circulating water cooling device.

[0027] After the cylinder is energized, the second electromagnet is energized. When the second electromagnet is energized, it can generate magnetism and suck the movable mold base tightly to one side of the fixed mold base, which can not only improve the stability of the movable mold base after it is fixed, but also prevent the movable mold base from rebounding after colliding with the fixed mold base.

[0028] Preferably, an annular sealing block is fixedly mounted on the outer side wall of the fixed mold base close to the movable mold base, an annular sealing groove cooperating with the annular sealing block is opened on the movable mold base, and a sealing gasket is fixedly mounted on the inner side wall of the annular sealing groove.

[0029] After the movable mold base is fixed to one side of the fixed mold base, the annular sealing block is inserted into the annular sealing groove and is in close contact with the sealing gasket, thereby improving the sealing performance of the connection between the movable mold base and the fixed mold base, thereby further improving the injection molding effect of the gear parts.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The setting of the fixing mechanism can automatically fix the movable mold base to the fixed mold base and separate it from the fixed mold base, eliminating the need for manual fixing and releasing of the movable mold. This is not only convenient to operate but also requires less manpower, thereby significantly reducing the use of injection molds and the processing cost of gear parts.

[0032] 2. The setting of the delay component can automatically start and shut down the cylinder without manual control, with a high degree of automation and easy use.

[0033] 3. The time for connecting the two joints when the power block moves downward can be adjusted, so that the starting time of the cylinder can be adjusted. The starting time of the cylinder and the time for the fixed connection between the movable mold base and the fixed mold base can be adjusted according to the cooling time of the gear parts after injection molding. It has a wide range of applications and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the overall structure of the mold part of the present invention;

[0035] Figure 2 It is a side structural cross-sectional view of the present invention;

[0036] Figure 3 For the present invention Figure 2 A magnified view of the structure of part A;

[0037] Figure 4 For the present invention Figure 2 A magnified view of the structure of part B;

[0038] Figure 5 For the present invention Figure 4 A magnified view of the structure of part C.

[0039] In the figure: 1. Fixed mold base; 2. Moving mold base; 3. Molding protrusion; 4. Molding groove; 5. Injection molding equipment; 6. Hydraulic drive equipment; 7. Top seat; 8. Cylinder; 9. Piston rod; 10. Limit plate; 11. Limit groove; 12. Fixed block; 13. Piezoelectric ceramic plate; 14. Power block; 15. Slide; 16. Guide rod; 17. First electromagnet; 18. Connector; 19. Mounting block; 20. Movable groove; 21. Reciprocating screw; 22. Fixed seat; 23. Turntable; 24. Positioning rod; 25. Positioning groove; 26. First cavity; 27. First piston; 28. Second cavity; 29. ​​Second piston; 30. Connecting pipe; 31. Connecting rod; 32. Fixed plate; 33. Lifting groove; 34. Limiting slider; 35. Limiting slide; 36. Second electromagnet; 37. Annular cooling groove; 38. Annular sealing block. DETAILED DESCRIPTION

[0040] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] See also Figures 1 to 5 The present invention provides an injection mold for a gear part, and the technical solution is as follows:

[0044] An injection mold for a gear part includes a fixed mold base 1, a molding groove 4 is provided on the fixed mold base 1, and an injection molding device 5 connected to the molding groove 4 is connected to one side of the fixed mold base 1;

[0045] A movable die base 2, on which a forming protrusion 3 is fixedly mounted, and one side of the movable die base 2 is connected to a hydraulic drive device 6;

[0046] A fixing mechanism is connected between the fixed mold base 1 and the movable mold base 2 to automatically fix the movable mold base 2 to the fixed mold base 1;

[0047] When the movable mold base 2 and the fixed mold base 1 are closed, the fixing mechanism fixes the movable mold base 2 to the fixed mold base 1 and automatically releases the fixation of the fixed mold base 1 to the movable mold base 2 after a set time.

[0048] When the movable mold base 2 and the fixed mold base 1 are closed, the fixing mechanism fixes the movable mold base 2 to the fixed mold base 1, thereby preventing the position of the movable mold base 2 from being offset due to excessive injection pressure during injection molding. After a set time, the fixing mechanism of the fixed mold base 1 to the movable mold base 2 is automatically released after the set time. At this time, the gear part has been formed in the molding groove 4, which makes it convenient for the hydraulic driving device 6 to drive the movable mold base 2 and the molding protrusion 3 to move to a side away from the fixed mold base 1 and remove the molded gear part. The setting of the fixing mechanism can automatically fix the movable mold base 2 to the fixed mold base 1 and separate it from the fixed mold base 1, without the need for manual fixing and releasing of the movable mold. It is not only convenient to operate, but also takes up less manpower, thereby significantly reducing the use of the injection mold and the processing cost of the gear part.

[0049] As an embodiment of the present invention, refer to Figure 2 、 Figure 3 and Figure 4 The fixing mechanism includes a top seat 7 fixedly mounted on the top wall of the fixed die seat 1, a cylinder 8 fixedly mounted on the top wall of the top seat 7, a piston rod 9 fixedly mounted on the output end of the cylinder 8, a limit plate 10 mounted on the bottom end of the piston rod 9, and the bottom end of the limit plate 10 extends to the lower side of the top seat 7, a limit groove 11 cooperating with the limit plate 10 is provided on the top wall of the movable die seat 2, a fixed block 12 is fixedly mounted on the outer side wall of the movable die seat 2 close to the fixed die seat 1, a piezoelectric ceramic piece 13 cooperating with the fixed block 12 is fixedly mounted on the outer side wall of the fixed die seat 1 close to the movable die seat 2, and the piezoelectric ceramic piece 13 is electrically connected to the cylinder 8, and a delay component is connected to the cylinder 8.

[0050] When the movable mold base 2 and the fixed mold base 1 are closed, the fixed block 12 is pressed against one side of the top seat 7 and squeezes the piezoelectric ceramic piece 13. When the piezoelectric ceramic piece 13 is squeezed, it will generate current and start the cylinder 8. When the power of the cylinder 8 is too large, multiple piezoelectric ceramic pieces 13 can be set to jointly power the cylinder 8. After the cylinder 8 is started, it will drive the piston rod 9 to drive the limit plate 10 to move downward and insert the bottom end of the limit plate 10 into the limit groove 11 on the top wall of the movable mold base 2, so that the movable mold base 2 can be fixedly connected to one side of the fixed mold base 1, thereby preventing the position of the movable mold base 2 from being offset due to excessive injection pressure during injection molding. The delay component connected to the cylinder 8 can control the power-on time of the cylinder 8. After the cylinder 8 is powered off, the piston rod 9 retracts and resets upward and drives the limit plate 10 to move to the upper side of the limit groove 11, so that the hydraulic drive device 6 can drive the movable mold base 2 and the molding protrusion 3 to move to the side away from the fixed mold base 1 and remove the molded gear parts.

[0051] As an embodiment of the present invention, refer to Figure 2 and Figure 4 The delay component includes a power block 14 slidably installed in the fixed mold base 1, and a slide groove 15 is opened in the fixed mold base 1 to cooperate with the power block 14. A guide rod 16 is fixedly installed in the slide groove 15 and is arranged through the power block 14, so that the power block 14 can only move vertically up and down. A first electromagnet 17 for attracting the power block 14 to move upward is fixedly installed on the top wall inside the slide groove 15, and the piezoelectric ceramic piece 13 is electrically connected to the first electromagnet 17. Two connectors 18 that cooperate with the power block 14 are symmetrically installed on the inner wall of the slide groove 15, and the two connectors 18 are electrically connected to the cylinder 8, and the two connectors 18 are electrically connected to the driving power supply.

[0052] When the piezoelectric ceramic piece 13 is squeezed, it will generate current and energize the first electromagnet 17. When the first electromagnet 17 is energized, it will generate magnetism and attract the power block 14 to move upward until it contacts the bottom end of the first electromagnet 17. At this time, the power block 14 connects the two connectors 18 and connects the circuit connected to the cylinder 8. After the piezoelectric ceramic piece 13 stops generating current, the power block 14 will slide down along the connectors 18 and the side walls of the slide groove 15 due to its own gravity. When the power block 14 moves downward, it will continue to connect the two connectors 18. At this time, the driving power supply connected to the two connectors 18 energizes the cylinder 8, so the cylinder 8 can be continuously energized for the set time. When the power block 14 slides to the bottom, it will disconnect from the two connectors 18 and the driving power supply. At this time, the cylinder 8 is completely powered off, and the cylinder 8 can be automatically started and shut down without manual control. It has a high degree of automation and is easy to use.

[0053] As an embodiment of the present invention, refer to Figure 2 and Figure 4 A mounting block 19 is slidably installed in the fixed mold base 1, and the two joints 18 are fixedly installed at the bottom end of the mounting block 19. A movable groove 20 is provided in the fixed mold base 1 to cooperate with the mounting block 19 and the two joints 18. A reciprocating screw rod 21 that passes through the mounting block 19 is rotatably installed in the movable groove 20, and the mounting block 19 and the reciprocating screw rod 21 are threadedly engaged with each other. The top end of the reciprocating screw rod 21 extends to the upper side of the fixed mold base 1, and a fixing component for fixing the reciprocating screw rod 21 is provided at the top of the fixed mold base 1.

[0054] The mounting block 19 and the reciprocating screw 21 are threadedly engaged with each other, so when the reciprocating screw 21 is rotated, the mounting block 19 can drive the two joints 18 to move up and down, thereby adjusting the length of the two joints 18 in the slide groove 15, and the time for connecting the two joints 18 when the power block 14 moves downward can be adjusted, thereby adjusting the starting time of the cylinder 8. The starting time of the cylinder 8 and the time for the movable mold base 2 to be fixedly connected to the fixed mold base 1 can be adjusted according to the cooling time of the gear parts after injection molding. It has a wide range of applications and good use effect.

[0055] As an embodiment of the present invention, refer to Figure 2 、 Figure 4 and Figure 5 The fixed assembly includes a fixed base 22 fixedly mounted on the top wall of the fixed mold base 1, and the top end of the reciprocating screw 21 extends to the upper side of the fixed base 22, and a turntable 23 is slidably mounted on the top end of the reciprocating screw 21. A rectangular slider is fixedly mounted on the bottom wall of the turntable 23, and the bottom end of the rectangular slider is inserted into the top end of the reciprocating screw 21. A rectangular slide groove that cooperates with the rectangular slider is opened in the reciprocating screw 21, and a plurality of positioning rods 24 are elastically connected to the bottom wall of the turntable 23. A plurality of positioning grooves 25 that cooperate with the positioning rods 24 are evenly opened on the top wall of the fixed base 22.

[0056] Pull the turntable 23 and the positioning rod 24 upward and pull the positioning rod 24 to the upper side of the fixed seat 22. At this time, the turntable 23 and the positioning rod 24 can be rotated freely. Due to the action of the rectangular slider, rotating the turntable 23 and the positioning rod 24 can drive the reciprocating screw 21 to rotate. After the rotation is completed, the turntable 23 is released. At this time, the turntable 23 will move downward due to its own weight. After the bottom end of the positioning rod 24 is partially inserted into the positioning groove 25 on the top wall of the fixed seat 22, the positioning rod 24, the turntable 23 and the reciprocating screw 21 can be prevented from rotating. The reciprocating screw 21 can be conveniently rotated and the reciprocating screw 21 can be fixed conveniently and quickly, which is easy to use.

[0057] As an embodiment of the present invention, refer to Figure 2 and Figure 4 A first cavity 26 is provided on the top of the fixed mold base 1, and a first piston 27 is slidably installed in the first cavity 26. A second cavity 28 is provided in the fixed mold base 1, and a second piston 29 is slidably installed in the second cavity 28. A connecting pipe 30 is connected to the opposite ends of the first cavity 26 and the second cavity 28. A connecting rod 31 is fixedly installed on the outer wall of one side of the mounting block 19, and the end of the connecting rod 31 away from the mounting block 19 is fixedly connected to the second piston 29. A plurality of indicator lines that cooperate with the first piston 27 are evenly arranged on the top wall of the fixed mold base 1, and the indicator lines are all located on the upper side of the first cavity 26.

[0058] When the mounting block 19 drives the two joints 18 to move upward, it will drive the connecting rod 31 and the second piston 29 to move upward. When the second piston 29 moves upward, the gas in the second chamber 28 can be injected into the first chamber 26 through the connecting pipe 30 and push the first piston 27 to move toward the end away from the second chamber 28. When the mounting block 19 drives the two joints 18 to move downward, it will drive the connecting rod 31 and the second piston 29 to move downward. When the second piston 29 moves downward, the gas in the first chamber 26 can be sucked into the second chamber 28 through the connecting pipe 30 and pull the first piston 27 to move toward the end close to the second chamber 28. The movement of the first piston 27 in the first chamber 26 and the position of the first piston 27 can be intuitively observed through the indicator line. Therefore, it is convenient to quickly understand the position of the mounting block 19 and the two joints 18, thereby further facilitating the adjustment of the starting time of the cylinder 8.

[0059] As an embodiment of the present invention, refer to Figure 2 and Figure 3 The bottom end of the piston rod 9 is connected to a fixed plate 32, and the limit plate 10 is fixedly installed on the bottom end of the fixed plate 32. A lifting groove 33 that cooperates with the fixed plate 32 is opened in the top seat 7. A limit slider 34 is fixedly installed on the bottom end of the piston rod 9, and a limit slide groove 35 that cooperates with the limit slider 34 is opened in the fixed plate 32.

[0060] The limit plate 10 and the fixed plate 32 are slidably connected to the bottom end of the piston rod 9. Therefore, the limit plate 10 and the fixed plate 32 will not act on the piston rod 9 after being subjected to a lateral thrust, thereby preventing the piston rod 9 from bending and breaking after being subjected to a lateral force.

[0061] As an embodiment of the present invention, refer to Figure 2 and Figure 3 The bottom wall of the limiting plate 10 close to the fixed mold base 1 is an inclined surface.

[0062] This makes it easier for the limiting plate 10 to be inserted into the limiting groove 11 on the top wall of the movable mold base 2 when it moves downward.

[0063] As an embodiment of the present invention, refer to Figure 2 and Figure 4 A plurality of second electromagnets 36 cooperating with the movable mold base 2 are evenly installed in the fixed mold base 1. The second electromagnets 36 are all electrically connected to the cylinder 8, and the second electromagnets 36 are all located on the side close to the movable mold base 2. A plurality of annular cooling grooves 37 are evenly opened in the fixed mold base 1, and the annular cooling grooves 37 are evenly arranged on the outside of the second electromagnets 36. The annular cooling grooves 37 are commonly connected to a circulating water cooling device. The circulating water cooling device continuously passes cooling water into the annular cooling grooves 37 to prevent the temperature of the second electromagnet 36 from continuing to rise after power is applied.

[0064] After the cylinder 8 is energized, the second electromagnet 36 is energized. After the second electromagnet 36 is energized, it can generate magnetism and suck the movable mold base 2 tightly to one side of the fixed mold base 1, which can not only improve the stability of the movable mold base 2 after being fixed, but also prevent the movable mold base 2 from rebounding after colliding with the fixed mold base 1.

[0065] As an embodiment of the present invention, refer to Figure 2 and Figure 4 An annular sealing block 38 is fixedly installed on the outer wall of the fixed mold base 1 close to the movable mold base 2. An annular sealing groove that cooperates with the annular sealing block 38 is opened on the movable mold base 2, and a sealing gasket is fixedly installed on the inner wall of the annular sealing groove.

[0066] After the movable mold base 2 is fixed to one side of the fixed mold base 1, the annular sealing block 38 is inserted into the annular sealing groove and is in close contact with the sealing gasket, thereby improving the sealing performance of the connection between the movable mold base 2 and the fixed mold base 1, thereby further improving the injection molding effect of the gear parts.

[0067] Working principle: Starting the hydraulic drive device 6 can drive the movable mold base 2 and the molding protrusion 3 to move back and forth horizontally. When the movable mold base 2 is closed with the fixed mold base 1 and the molding protrusion 3 is inserted into the corresponding molding groove 4, the injection molding equipment 5 can be started to perform injection molding. When the movable mold base 2 is closed with the fixed mold base 1, the fixed block 12 is pressed against one side of the top seat 7 and squeezes the piezoelectric ceramic piece 13. After the piezoelectric ceramic piece 13 is squeezed, it will generate current and energize the first electromagnet 17. After the first electromagnet 17 is energized, it will generate magnetism and attract the power block 14 to move upward until it contacts the bottom end of the first electromagnet 17. At this time, the power block 14 connects the two connectors 18 and connects the circuit connected to the cylinder 8. After the piezoelectric ceramic piece 13 stops generating current, the power block 14 will slide down along the side wall of the connector 18 and the slide groove 15 due to its own gravity. When the power block 14 moves downward, it will continue to connect the two connectors 18 and connect the circuit connected to the cylinder 8. Therefore, the cylinder 8 can be continuously energized for the set time. After the cylinder 8 is started, it will drive the piston rod 9 to drive the limit plate 10 to move downward and insert the bottom end of the limit plate 10 into the limit groove 11 on the top wall of the movable mold base 2, so that the movable mold base 2 can be fixedly connected to one side of the fixed mold base 1, thereby preventing the position of the movable mold base 2 from being offset due to excessive injection pressure during injection molding. When the power block 14 slides to the bottom, the connection with the two joints 18 will be disconnected. At this time, the cylinder 8 is powered off. After the cylinder 8 is powered off, the piston rod 9 retracts and resets upward and drives the limit plate 10 to move to the upper side of the limit groove 11, thereby facilitating the hydraulic drive device 6 to drive the movable mold base 2 and the molding protrusion 3 to move to the side away from the fixed mold base 1 and remove the molded gear parts. The setting of the fixing mechanism can automatically fix the movable mold base 2 to the fixed mold base 1 and separate it from the fixed mold base 1, without the need for manual fixing of the movable mold and releasing the fixation of the movable mold. It is not only convenient to operate, but also takes up less manpower, thereby significantly reducing the use of the injection mold and the processing cost of the gear parts.

[0068] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the purpose of this technical solution based on the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more compatible with and in line with the technical solution of the present invention. It is a technical solution for the best application of this technical solution. The model of its product can be replaced and modified according to the technical parameters required. It is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0069] 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 mold for a gear part, comprising a fixed mold base (1), wherein the fixed mold base (1) is provided with a molding groove (4), and one side of the fixed mold base (1) is connected to an injection molding device (5) in communication with the molding groove (4); A movable die base (2), a forming protrusion (3) being fixedly mounted on the movable die base (2), and a hydraulic drive device (6) being connected to one side of the movable die base (2); A fixing mechanism is connected between the fixed mold base (1) and the movable mold base (2) for automatically fixing the movable mold base (2) to the fixed mold base (1); Its characteristics are: When the movable mold base (2) and the fixed mold base (1) are in mold closing, the fixing mechanism fixes the movable mold base (2) to the fixed mold base (1) for a set time and then automatically releases the fixing of the fixed mold base (1) to the movable mold base (2); The fixing mechanism includes a top seat (7) fixedly mounted on the top wall of the fixed mold seat (1), a cylinder (8) fixedly mounted on the top wall of the top seat (7), a piston rod (9) fixedly mounted on the output end of the cylinder (8), a limiting plate (10) mounted on the bottom end of the piston rod (9), and the bottom end of the limiting plate (10) extends to the lower side of the top seat (7), a limiting groove (11) cooperating with the limiting plate (10) is provided on the top wall of the movable mold seat (2), a fixing block (12) is fixedly mounted on the outer side wall of the movable mold seat (2) on the side close to the fixed mold seat (1), a piezoelectric ceramic piece (13) cooperating with the fixing block (12) is fixedly mounted on the outer side wall of the fixed mold seat (1) on the side close to the movable mold seat (2), and the piezoelectric ceramic piece (13) is electrically connected to the cylinder (8), and a delay component is connected to the cylinder (8); The delay assembly includes a power block (14) slidably mounted in the fixed mold base (1), a slide groove (15) cooperating with the power block (14) is provided in the fixed mold base (1), a guide rod (16) penetrating the power block (14) is fixedly mounted in the slide groove (15), a first electromagnet (17) for attracting the power block (14) to move upward is fixedly mounted on the top wall inside the slide groove (15), and the piezoelectric ceramic piece (13) is electrically connected to the first electromagnet (17), and two connectors (18) cooperating with the power block (14) are symmetrically mounted on the inner wall of the slide groove (15), and the two connectors (18) are electrically connected to the cylinder (8) in common; A mounting block (19) is slidably mounted in the fixed die base (1), and two joints (18) are fixedly mounted on the bottom end of the mounting block (19). A movable groove (20) is provided in the fixed die base (1) and cooperates with the mounting block (19) and the two joints (18). A reciprocating screw rod (21) penetrating the mounting block (19) is rotatably mounted in the movable groove (20), and the mounting block (19) and the reciprocating screw rod (21) are threadedly engaged with each other. The top end of the reciprocating screw rod (21) extends to the upper side of the fixed die base (1), and a fixing component for fixing the reciprocating screw rod (21) is provided at the top end of the fixed die base (1); The fixing assembly includes a fixing seat (22) fixedly mounted on the top wall of the fixed mold seat (1), and the top end of the reciprocating screw (21) extends to the upper side of the fixing seat (22), a turntable (23) is slidably mounted on the top end of the reciprocating screw (21), a rectangular slider is fixedly mounted on the bottom wall of the turntable (23), and the bottom end of the rectangular slider is inserted into the top end of the reciprocating screw (21), a rectangular slide groove is provided in the reciprocating screw (21) and cooperates with the rectangular slider, a plurality of positioning rods (24) are elastically connected to the bottom wall of the turntable (23), and a plurality of positioning grooves (25) are evenly provided on the top wall of the fixing seat (22) and cooperate with the positioning rods (24); A first cavity (26) is provided on the top of the fixed mold base (1), a first piston (27) is slidably installed in the first cavity (26), a second cavity (28) is provided in the fixed mold base (1), a second piston (29) is slidably installed in the second cavity (28), a connecting pipe (30) is connected to the opposite ends of the first cavity (26) and the second cavity (28), a connecting rod (31) is fixedly installed on the outer wall of one side of the mounting block (19), and the end of the connecting rod (31) away from the mounting block (19) is fixedly connected to the second piston (29), and a plurality of indicator lines that cooperate with the first piston (27) are evenly arranged on the top wall of the fixed mold base (1), and the indicator lines are all located on the upper side of the first cavity (26).

2. The injection mold for a gear part according to claim 1, characterized in that: The bottom end of the piston rod (9) is connected to a fixed plate (32), and a limit plate (10) is fixedly mounted on the bottom end of the fixed plate (32). A lifting groove (33) cooperating with the fixed plate (32) is provided in the top seat (7). A limit slider (34) is fixedly mounted on the bottom end of the piston rod (9), and a limit slide groove (35) cooperating with the limit slider (34) is provided in the fixed plate (32).

3. The injection mold for a gear part according to claim 1, characterized in that: The bottom wall of the limiting plate (10) on the side close to the fixed die seat (1) is an inclined surface.

4. The injection mold for a gear part according to claim 1, characterized in that: A plurality of second electromagnets (36) cooperating with the movable mold base (2) are evenly installed in the fixed mold base (1), the second electromagnets (36) are electrically connected to the cylinder (8), and the second electromagnets (36) are all located on a side close to the movable mold base (2), a plurality of annular cooling grooves (37) are evenly opened in the fixed mold base (1), and the annular cooling grooves (37) are evenly arranged on the outside of the second electromagnets (36), and the annular cooling grooves (37) are commonly connected to a circulating water cooling device.

5. The injection mold for a gear part according to claim 1, characterized in that: An annular sealing block (38) is fixedly mounted on the outer side wall of the fixed die base (1) close to the movable die base (2), an annular sealing groove cooperating with the annular sealing block (38) is formed on the movable die base (2), and a sealing gasket is fixedly mounted on the inner side wall of the annular sealing groove.

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