Plastic gear injection molding mold
Through the cooperation of the forming mechanism and cutting knife in the mold body, the problem that existing molds can only produce single-size plastic gears, achieving multi-size production and efficient cutting of excess parts, and improving the production efficiency and quality of plastic gears.
Patent Information
- Application Number
- CN202422068386.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-26
AI Technical Summary
Existing injection molds can only produce single-size plastic gears, and the residual excess raw materials during the injection molding process lead to protrusions, affecting production efficiency.
The molding mechanism in the mold body is adopted, including the die core, the rotating shaft, the servo motor and the cutting knife. The die core is replaced by the hydraulic cylinder, and the servo motor drives the cutting knife to cut off the excess parts, and the die core is maintained with the pressure plate and the defined groove.
The production of multi-size plastic gears is achieved, which improves production efficiency and ensures injection molding quality, and avoids the residue of excess parts.
Smart Images
Figure CN223236828U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of production and processing of plastic gears, in particular to an injection molding die for plastic gears. Background Art
[0002] Plastic gears are primarily used for transmissions. Made of plastic, they are increasingly used in mechanical transmissions. Plastic gears are typically produced using injection molding, a process that combines both injection and molding. The advantages of injection molding include high production speed, high efficiency, automated operation, and a wide variety of designs and colors.
[0003] The existing technology has the following deficiencies: when the existing injection molding mold is used to injection mold plastic gears, it can usually only be used to inject and produce plastic gears of a single size. At the same time, due to the residual raw material between the injection port and the molded plastic gear, redundant protrusions will be formed on the surface of the plastic gear. The redundant parts on the surface of the plastic gear cannot be quickly removed, which increases the production process of the plastic gear and thus affects the production efficiency of the plastic gear. Utility Model Content
[0004] The purpose of the utility model is to provide a plastic gear injection molding mold, in which the mold core remains stable during the injection molding process by limiting the fixed plate through the pressure plate and the limiting groove. The operation of the hydraulic cylinder can facilitate the staff to replace the mold core, so that the device can be used for the production of plastic gears of different sizes. At the same time, the servo motor works through the meshing action between the rotating gear and the movable gear rod, so that the cutting knife can cut the excess part generated between the plastic gear and the injection molding tube, so as to solve the above-mentioned shortcomings in the technology.
[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic gear injection molding mold, comprising a mold body, and further comprising:
[0006] The molding mechanism is arranged on the inner side and the outer wall of one end of the mold body and is used for injection molding the plastic gear;
[0007] The molding mechanism includes a mold core and a rotating shaft. The mold core is arranged at the inner bottom of the mold body. Fixed plates are fixedly installed at the bottom of the outer walls of both ends of the mold core. A hydraulic cylinder is provided at the bottom of the mold core. The rotating shaft is provided on the outer wall of one end of the mold body. A servo motor is provided on one side of the rotating shaft. A rotating gear is fixedly sleeved on the outer side of the rotating shaft. A movable gear rod is meshed with the top of the rotating gear. A cutting knife is fixedly installed at one end of the movable gear rod. The bottom surface of the cutting knife is movably connected to the top surface of the mold core.
[0008] Preferably, the mold body includes a lower template, and guide columns are fixedly installed at the four corners of the top of the lower template. A placement groove is opened on the inner wall of the top of the lower template, and the inner wall of the placement groove is movably connected to the outer wall of the mold core.
[0009] Preferably, limiting grooves are provided at both ends of the placement groove, the inner walls of the two limiting grooves are movably connected to the outer walls of the two fixed plates respectively, the outer side of the guide column is movably sleeved with an upper template, and the inner wall of the upper template is fixedly installed with an injection molding tube.
[0010] Preferably, pressure plates are fixedly installed at both ends of the bottom of the upper template, the outer walls of the two pressure plates are movably connected to the inner walls of the two limiting grooves respectively, and the bottoms of the two pressure plates are movably connected to the tops of the two fixed plates respectively.
[0011] Preferably, the inner top of the lower template is fixedly connected to the hydraulic cylinder, and the output end of the hydraulic cylinder passes through the bottom inner wall of the placement groove and is movably connected to the bottom of the mold core.
[0012] Preferably, the inner side of the top of the outer wall at one end of the lower template is movably connected to the movable gear rod, and one side of the top of the outer wall at one end of the lower template is fixedly connected to the servo motor, and the servo motor and the rotating shaft are connected through an output shaft.
[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:
[0014] 1. The fixed plate can be limited by the pressing plate and the limiting groove, so that the mold core can remain stable inside the placement groove during the injection molding process. The operation of the hydraulic cylinder allows the mold core to be ejected upward from the placement groove, which makes it convenient for workers to replace the mold core, thereby allowing the device to be used for the production of plastic gears of different sizes. At the same time, the servo motor rotates the rotating shaft. Through the meshing action between the rotating gear and the movable gear rod, the cutting knife can cut the excess part between the plastic gear and the injection molding tube, thereby improving the production efficiency of plastic gears.
[0015] 2. The mold core can be installed and fixed through the placement groove, and the guide column can limit the movement of the upper template, so that the upper template can stably suppress and limit the mold core, thereby ensuring the stability of the injection molding work, avoiding the offset during the injection molding process, and ensuring the quality of plastic gear injection molding. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 It is a front vertical sectional view of the present utility model.
[0019] Figure 3 This is an exploded view of the three-dimensional structure of the mold body of the present invention.
[0020] Figure 4 This is an exploded view of the three-dimensional structure of the forming mechanism of the present invention.
[0021] Description of reference numerals:
[0022] 1. Mold body; 101. Lower mold plate; 102. Placement slot; 103. Limiting slot; 104. Guide column; 105. Upper mold plate; 106. Injection tube; 107. Press plate;
[0023] 2. Molding mechanism; 201. Mold core; 202. Fixed plate; 203. Hydraulic cylinder; 204. Movable gear rod; 205. Cutting knife; 206. Rotating shaft; 207. Servo motor; 208. Rotating gear. DETAILED DESCRIPTION
[0024] The utility model provides Figure 1 The plastic gear injection molding mold shown includes a mold body 1 and also includes:
[0025] The molding mechanism 2 is arranged on the inner side and one end outer wall of the mold body 1 and is used for injection molding the plastic gear.
[0026] In order to facilitate the injection molding of plastic gears, such as Figure 1-2 and Figure 4 As shown, the molding mechanism 2 includes a mold core 201 and a rotating shaft 206. The mold core 201 is arranged at the inner bottom of the mold body 1. The bottom of the outer walls of both ends of the mold core 201 are fixedly installed with a fixed plate 202. A hydraulic cylinder 203 is arranged at the bottom of the mold core 201. The rotating shaft 206 is arranged on the outer wall of one end of the mold body 1. A servo motor 207 is arranged on one side of the rotating shaft 206. A rotating gear 208 is fixedly sleeved on the outer side of the rotating shaft 206. A movable gear rod 204 is meshed and installed on the top of the rotating gear 208. A cutting knife 205 is fixedly installed on one end of the movable gear rod 204. The bottom surface of the cutting knife 205 is movably connected to the top surface of the mold core 201. By replacing different mold cores 201, plastic gears of different sizes can be produced. After the injection molding is completed, the servo motor 207 works through the meshing action between the rotating gear 208 and the movable gear rod 204 to push the cutting knife 205 to cut the excess part of the top of the plastic gear.
[0027] In order to conveniently install and fix the mold core 201, Figure 1-3 As shown, the mold body 1 includes a lower template 101, and guide columns 104 are fixedly installed at the four corners of the top of the lower template 101. A placement groove 102 is opened on the inner wall of the top of the lower template 101. The inner wall of the placement groove 102 is movably connected to the outer wall of the mold core 201. Different mold cores 201 can be placed through the placement groove 102, and then by replacing the mold core 201, the device can produce plastic gears of different sizes.
[0028] In order to keep the core 201 stable during the injection molding process, Figure 2-4 As shown, limiting grooves 103 are provided at both ends of the placement groove 102, and the inner walls of the two limiting grooves 103 are movably connected to the outer walls of the two fixed plates 202 respectively. The upper template 105 is movably sleeved on the outer side of the guide column 104, and the inner wall of the upper template 105 is fixedly installed with an injection tube 106. Pressure plates 107 are fixedly installed at both ends of the bottom of the upper template 105, and the outer walls of the two pressure plates 107 are movably connected to the inner walls of the two limiting grooves 103 respectively. The bottoms of the two pressure plates 107 are movably connected to the tops of the two fixed plates 202 respectively. The pressure plates 107 and the limiting grooves 103 can fix the fixed plates 202, so that the mold core 201 can remain stable inside the placement groove 102 during the injection molding process.
[0029] In order to conveniently replace the mold core 201, Figure 2 As shown, the inner top of the lower template 101 is fixedly connected to the hydraulic cylinder 203, and the output end of the hydraulic cylinder 203 passes through the bottom inner wall of the placement groove 102 and is movably connected to the bottom of the core 201. The hydraulic cylinder 203 can push the core 201 upward from the inside of the placement groove 102, which can facilitate the staff to replace the core 201.
[0030] In order to keep the cutting blade 205 stable during the movement, Figure 2-4 As shown, the inner side of the top of the outer wall at one end of the lower template 101 is movably connected to the movable gear rod 204, and one side of the top of the outer wall at one end of the lower template 101 is fixedly connected to the servo motor 207. The servo motor 207 is connected to the rotating shaft 206 through the output shaft transmission. The lower template 101 can limit the movement of the movable gear rod 204. The servo motor 207 works through the meshing action between the rotating gear 208 and the movable gear rod 204, so that the cutting knife 205 can move stably along the top surface of the lower template 101, so that the cutting knife 205 can stably cut the excess part of the plastic gear.
[0031] When the plastic gear is injection molded, the mold core 201 is placed in the placement groove 102 at the top of the lower mold plate 101, and the fixed plates 202 at both ends can be placed in the two limiting grooves 103 respectively. Then, the upper mold plate 105 is moved toward the lower mold plate 101 along the guide column 104. When the upper mold plate 105 contacts the lower mold plate 101, the pressure plates 107 at both ends of the bottom of the upper mold plate 105 can be inserted into the two limiting grooves 103 and press the two fixed plates 202, so that the mold core 201 remains stable during the injection molding process. Then, the injection molding operation can be performed into the mold core 201 through the injection molding tube 106, so that the plastic gear can be injection molded inside the mold core 201. When the injection molding is completed, the upper mold plate 105 is separated from the lower mold plate 101, and then the servo motor 207 works to rotate the rotating shaft 206, which can drive the rotating gear 208 to rotate. The meshing action between the wheel parts causes the movable gear rod 204 to move toward the mold core 201, so that the cutting knife 205 can move along the top surface of the lower template 101, so that the cutting knife 205 can cut the excess part generated at the contact position between the plastic gear and the injection tube 106. After the cutting is completed, the servo motor 207 rotates in the opposite direction, so that the cutting knife 205 can be stored in the outer wall of one end of the lower template 101, thereby improving the production efficiency of the plastic gear. When plastic gears of different sizes need to be produced, the hydraulic cylinder 203 can push the mold core 201 upward from the inside of the placement groove 102, which can facilitate the staff to replace the mold core 201, thereby improving the adaptability of the mold. This embodiment specifically solves the problem in the prior art that the mold cannot conveniently produce plastic gears of different sizes and cannot conveniently remove excess parts, which affects the production efficiency of the plastic gear.
[0032] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A plastic gear injection molding mold, comprising a mold body (1), characterized in that: Also includes: A molding mechanism (2) is arranged on the inner side and one end outer wall of the mold body (1) and is used for injection molding the plastic gear; The molding mechanism (2) comprises a mold core (201) and a rotating shaft (206); the mold core (201) is arranged at the inner bottom of the mold body (1); fixed plates (202) are fixedly installed at the bottom of the outer walls of both ends of the mold core (201); a hydraulic cylinder (203) is arranged at the bottom of the mold core (201); the rotating shaft (206) is arranged on the outer wall of one end of the mold body (1); a servo motor (207) is arranged on one side of the rotating shaft (206); a rotating gear (208) is fixedly sleeved on the outer side of the rotating shaft (206); a movable gear rod (204) is meshed with and installed on the top of the rotating gear (208); a cutting knife (205) is fixedly installed on one end of the movable gear rod (204); the bottom surface of the cutting knife (205) is movably connected to the top surface of the mold core (201).
2. The plastic gear injection molding die according to claim 1, characterized in that: The mold body (1) comprises a lower mold plate (101), the four corners of the top of the lower mold plate (101) are fixedly mounted with guide columns (104), the top inner wall of the lower mold plate (101) is provided with a placement groove (102), and the inner wall of the placement groove (102) is movably connected to the outer wall of the mold core (201).
3. The plastic gear injection molding die according to claim 2, characterized in that: Both ends of the placement groove (102) are provided with limiting grooves (103), the inner walls of the two limiting grooves (103) are movably connected to the outer walls of the two fixed plates (202), the outer side of the guide column (104) is movably sleeved with an upper template (105), and the inner wall of the upper template (105) is fixedly installed with an injection molding tube (106).
4. The plastic gear injection molding die according to claim 3, characterized in that: Both ends of the bottom of the upper template (105) are fixedly installed with pressure plates (107), the outer walls of the two pressure plates (107) are movably connected to the inner walls of the two limiting grooves (103), and the bottoms of the two pressure plates (107) are movably connected to the tops of the two fixed plates (202).
5. The plastic gear injection molding die according to claim 2, characterized in that: The inner top of the lower template (101) is fixedly connected to the hydraulic cylinder (203), and the output end of the hydraulic cylinder (203) passes through the bottom inner wall of the placement groove (102) and is movably connected to the bottom of the mold core (201).
6. The plastic gear injection molding die according to claim 2, characterized in that: The inner side of the top of the outer wall at one end of the lower template (101) is movably connected to the movable gear rod (204), and one side of the top of the outer wall at one end of the lower template (101) is fixedly connected to the servo motor (207). The servo motor (207) is connected to the rotating shaft (206) through an output shaft transmission.