High-precision plastic gear injection mold

Abstract

The high-precision plastic gear injection mold comprises a bottom plate, a female mold is fixedly installed on the outer wall of the top of the bottom plate, a discharging assembly is installed in the female mold, the discharging assembly comprises pushing rods inserted into the female mold in a sliding mode, the outer walls of the tops of the multiple pushing rods are coaxially and fixedly provided with ejecting blocks, and the ejecting blocks are arranged on the outer walls of the tops of the multiple pushing rods. The multiple material pushing rods are distributed in a groove of the female die at equal intervals, one ends of the bottoms of the multiple material pushing rods are fixedly connected with the same connecting plate, multiple springs are fixedly connected between the connecting plate and the female die, and the multiple material pushing rods are sleeved with the multiple springs correspondingly. An extension rod is fixedly connected to each of the two sides of the outer wall of the top of the connecting plate, a supporting frame is fixedly connected to the outer wall of the top of the bottom plate, the discharging assembly is arranged, when the male die is driven to move upwards, a gear finished product attached to the interior of the female die can be pushed out of the groove, and therefore it is guaranteed that the gear taking process is more convenient.

Description

Technical Field

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

[0002] An injection mold is a tool for producing plastic products. The heated and melted plastic is injected into the mold cavity inside the injection mold by an injection molding machine under high pressure, and then cooled and solidified to obtain a molded product. This processing method is also commonly used in the production of plastic gears.

[0003] After searching, the utility model with Chinese patent announcement number CN214448092U discloses a high-precision plastic injection mold, which includes a movable mold and a fixed mold, the fixed mold is provided with a plurality of guide columns, the movable mold is provided with a plurality of guide holes that are mutually plugged with the plurality of guide holes, the guide holes are provided with buffer blocks, and the guide columns are inserted into the guide holes and abut against the buffer blocks.

[0004] After the above device is produced, it will be attached to one of the molds, and the removal process is relatively difficult, so there is room for improvement. Utility Model Content

[0005] The purpose of the utility model is to provide a high-precision plastic gear injection mold to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision plastic gear injection mold, including a base plate, characterized in that: a die is fixedly installed on the top outer wall of the base plate, a discharge assembly is installed in the die, the discharge assembly includes a push rod slidably inserted inside the die, a plurality of push rods are coaxially fixed with push blocks on the top outer walls, and a plurality of push rods are equidistantly distributed in the groove of the die, a plurality of push rods are fixedly connected to the same connecting plate at one end of the bottom, a plurality of springs are fixedly connected between the connecting plate and the die, a plurality of springs are respectively sleeved on the outside of a plurality of push rods, and an extension rod is fixedly connected to both sides of the top outer wall of the connecting plate.

[0007] As a further preferred embodiment of the present technical solution, the top outer wall of the base plate is fixedly connected to a support frame, a hydraulic cylinder is fixedly installed on the top outer wall of the support frame, a punch is coaxially fixed to the output end of the hydraulic cylinder, and a pull rod is fixedly connected to the outer walls on both sides of the punch, and the two pull rods correspond to the two extension rods respectively.

[0008] When the punch is driven to move upward, the finished gear attached to the die can be pushed out of the groove, thereby ensuring that the gear picking process is more convenient. The two pull rods move synchronously with the punch, and then the pull rods contact the top of the extension rod and drive it to move upward. The two extension rods drive the connecting plate to move upward synchronously, and the connecting plate drives multiple push rods to move out of the groove of the die, and the gear on the top can be pushed out of the groove. In addition, when multiple push rods apply external force synchronously, it can also ensure that the gear will not be damaged by strong squeezing due to uneven force. When the punch drops again, the spring will recover, and the interface drives the push rod back to its original position.

[0009] As a further preferred embodiment of the technical solution, a stabilizing rod is slidably inserted into each of the four corners of the punch, and both ends of the stabilizing rods are respectively fixedly connected to the base plate and the support frame, and a reinforcement rod is fixedly connected to the outside of the four corners of the punch, and the four reinforcement rods can be just mounted on the outside of the die.

[0010] By starting the hydraulic cylinder to drive the punch to move downward, the punch can be more stable under the restriction of the stabilizer bar, and with multiple reinforcement rods, the fit between the punch and the die is more precise, which is beneficial to improving the accuracy of gear manufacturing.

[0011] As a further preferred embodiment of the present technical solution, one end of the bottom of the four reinforcement rods is arranged to be in an inclined state.

[0012] As a further preferred embodiment of the present technical solution, a plurality of feed ports are provided in the middle of the punch, and the plurality of feed ports all penetrate the punch.

[0013] As a further preferred embodiment of the present technical solution, cooling channels are provided inside the concave mold and the punch, and two connecting ports are provided on the outer walls of one end of the concave mold and the punch, and the two connecting ports are respectively connected to the two ends of the cooling channel.

[0014] As a further preferred embodiment of the present technical solution, a stabilizing sleeve is fixedly connected to the outer walls on both sides of the die, and the two extension rods are slidably inserted into the two stabilizing sleeves respectively.

[0015] The utility model provides a high-precision plastic gear injection mold, which has the following beneficial effects:

[0016] (1) The utility model sets a discharge assembly, which can push the finished gear attached to the die out of the groove when the punch is driven to move upward, thereby ensuring that the gear is taken out more conveniently. The two pull rods move synchronously with the punch, and then the pull rods contact the top of the extension rod and drive it to move upward. The two extension rods drive the connecting plate to move upward synchronously, and the connecting plate drives multiple push rods to move out of the groove of the die, so that the gear on the top can be pushed out of the groove. In addition, when multiple push rods apply external force synchronously, it can also ensure that the gear will not be damaged by strong squeezing due to uneven force. When the punch drops again, the spring will also recover, and the interface drives the push rod back to its original position.

[0017] (2) The utility model provides a stabilizing rod and a reinforcing rod, and starts the hydraulic cylinder to drive the punch to move downward. The punch can be more stable under the restriction of the stabilizing rod, and the combination of multiple reinforcing rods makes the fit between the punch and the die more precise, which is beneficial to improving the accuracy of manufacturing gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0020] Figure 3 It is an enlarged structural diagram of the discharge assembly of the utility model;

[0021] Figure 4 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0022] In the figure: 1. bottom plate; 2. die; 3. support frame; 4. hydraulic cylinder; 5. punch; 6. stabilizing rod; 7. reinforcing rod; 8. feed port; 9. connecting port; 10. discharge assembly; 101. push rod; 102. connecting plate; 103. spring; 104. extension rod; 105. pull rod; 106. stabilizing sleeve; 107. ejecting block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model provides a technical solution: Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, a high-precision plastic gear injection mold includes a base plate 1, characterized in that: a die 2 is fixedly installed on the top outer wall of the base plate 1, a discharge assembly 10 is installed in the die 2, the discharge assembly 10 includes a push rod 101 slidably inserted inside the die 2, and a plurality of push rods 101 are coaxially fixed with a push block 107 on the top outer walls, and a plurality of push rods 101 are equidistantly distributed in the groove of the die 2, a plurality of push rods 101 are fixedly connected to the same connecting plate 102 at one end of the bottom, a plurality of springs 103 are fixedly connected between the connecting plate 102 and the die 2, a plurality of springs 103 are respectively sleeved on the outside of the plurality of push rods 101, and an extension rod 104 is fixedly connected to both sides of the top outer wall of the connecting plate 102.

[0025] The top outer wall of the bottom plate 1 is fixedly connected to a support frame 3, the top outer wall of the support frame 3 is fixedly installed with a hydraulic cylinder 4, a punch 5 is coaxially fixed to the output end of the hydraulic cylinder 4, and the outer walls on both sides of the punch 5 are fixedly connected with a pull rod 105, and the two pull rods 105 correspond to the two extension rods 104 respectively.

[0026] The two pull rods 105 move synchronously with the punch 5, and then the pull rod 105 contacts the top of the extension rod 104 and drives it to move upward. The two extension rods 104 drive the connecting plate 102 to move upward synchronously, and the connecting plate 102 drives multiple push rods 101 to move out of the groove of the die 2, and the gear on the top can be pushed out of the groove. In addition, multiple push rods 101 apply external force synchronously, which can also ensure that the gear will not be damaged by strong squeezing due to uneven force. When the punch 5 drops again, the spring 103 will also recover, and the interface drives the push rod 101 back to its original position, and so on.

[0027] like Figure 1 and Figure 2 As shown, a stabilizing rod 6 is slidably inserted into each of the four corners of the punch 5, and both ends of the stabilizing rods 6 are fixedly connected to the base plate 1 and the support frame 3 respectively. A reinforcing rod 7 is fixedly connected to the outside of the four corners of the punch 5, and the four reinforcing rods 7 can be just mounted on the outside of the die 2.

[0028] The bottom ends of the four reinforcing rods 7 are all arranged in an inclined state, so that the sleeve installation work is more convenient during the initial installation.

[0029] Start the hydraulic cylinder 4 to drive the punch 5 to move downward. The punch 5 can be more stable under the restriction of the stabilizing rod 6. In addition, with the cooperation of multiple reinforcing rods 7, the cooperation between the punch 5 and the die 2 is more precise, which is beneficial to improve the accuracy of manufacturing gears.

[0030] like Figure 1 and Figure 2 As shown, a plurality of feed ports 8 are provided in the middle of the punch 5 , and the plurality of feed ports 8 all penetrate the punch 5 .

[0031] Cooling channels are arranged inside the concave die 2 and the convex die 5. Two connecting ports 9 are arranged on the outer walls of one end of the concave die 2 and the convex die 5. The two connecting ports 9 are respectively connected to the two ends of the cooling channels.

[0032] The molten raw material enters the molding cavity from the feed port 8, and then the gear is cooled and plasticized by a cooling component.

[0033] like Figure 2 and Figure 3 As shown, a stabilizing sleeve 106 is fixedly connected to the outer walls on both sides of the die 2, and the two extension rods 104 are slidably inserted in the two stabilizing sleeves 106 respectively, so that the state of the extension edge 104 is more stable, which is conducive to improving its service life.

[0034] The utility model provides a high-precision plastic gear injection mold, and the specific working principle is as follows:

[0035] When the device is working, the punch 5 is driven downward by starting the hydraulic cylinder 4. The punch 5 can ensure its state to be more stable under the restriction of the stabilizing rod 6, and cooperate with multiple reinforcement rods 7 to make the cooperation between the punch 5 and the die 2 more precise, which is beneficial to improve the precision of manufacturing the gear. The molten raw material enters the molding cavity from the feed port 8, and then the gear is cooled and plasticized by the cooling component. Then, the punch 5 is driven upward by controlling the hydraulic cylinder 4, and the two pull rods 105 move synchronously with the punch 5. Then the pull rods 105 and the top of the extension rod 104 contact and drive it to move upward. The two extension rods 104 drive the connecting plate 102 to move upward synchronously. The connecting plate 102 drives multiple push rods 101 to move out of the groove of the die 2, and the gear on the top can be pushed out of the groove. When multiple push rods 101 apply external force synchronously, it can also ensure that the gear will not be damaged by strong extrusion due to uneven force. When the punch 5 drops again, the spring 103 will also recover, and the interface drives the push rod 101 back to its original position, thus reciprocating.

[0036] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision plastic gear injection mold, comprising a base plate (1), characterized in that: A die (2) is fixedly mounted on the top outer wall of the bottom plate (1), a discharge assembly (10) is mounted in the die (2), the discharge assembly (10) comprises a push rod (101) slidably inserted inside the die (2), a plurality of push rods (101) are coaxially fixed with a push block (107) on the top outer walls, and the plurality of push rods (101) are equidistantly distributed in the groove of the die (2), a plurality of bottom ends of the plurality of push rods (101) are fixedly connected to the same connecting plate (102), a plurality of springs (103) are fixedly connected between the connecting plate (102) and the die (2), the plurality of springs (103) are respectively sleeved on the outside of the plurality of push rods (101), and an extension rod (104) is fixedly connected to both sides of the top outer wall of the connecting plate (102).

2. A high-precision plastic gear injection mold according to claim 1, characterized in that: The top outer wall of the base plate (1) is fixedly connected to a support frame (3), the top outer wall of the support frame (3) is fixedly mounted with a hydraulic cylinder (4), a punch (5) is coaxially fixed to the output end of the hydraulic cylinder (4), and both sides of the outer wall of the punch (5) are fixedly connected to a pull rod (105), and the two pull rods (105) correspond to the two extension rods (104) respectively.

3. A high-precision plastic gear injection mold according to claim 2, characterized in that: Each of the four corners of the male mold (5) is slidably connected to a stabilizing rod (6), and the two ends of the plurality of stabilizing rods (6) are respectively fixedly connected to the bottom plate (1) and the support frame (3). Each of the four corners of the male mold (5) is fixedly connected to a reinforcing rod (7) on the outside, and the four reinforcing rods (7) can be exactly sleeved on the outside of the female mold (2).

4. A high-precision plastic gear injection mold according to claim 3, characterized in that: One end of the bottom of the four reinforcement rods (7) is arranged in an inclined state.

5. A high-precision plastic gear injection mold according to claim 2, characterized in that: A plurality of feed openings (8) are provided in the middle of the male mold (5), and the plurality of feed openings (8) all penetrate the male mold (5).

6. A high-precision plastic gear injection mold according to claim 1, characterized in that: The concave mold (2) and the convex mold (5) are both provided with cooling channels inside, and the outer walls of one end of the concave mold (2) and the convex mold (5) are both provided with two connecting ports (9), and the two connecting ports (9) are respectively connected to the two ends of the cooling channel.

7. A high-precision plastic gear injection mold according to claim 1, characterized in that: The outer walls on both sides of the concave mold (2) are fixedly connected to a stabilizing sleeve (106), and the two extension rods (104) are respectively slidably inserted into the two stabilizing sleeves (106).

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