Forming die
By designing a mold for injection molding, the problem of changing the position of the central ring and difficulty in taking out the worm gear is solved, and the stable positioning of the central ring and the smooth molding and ejection of the worm gear are achieved, which improves the stability and efficiency of the molding process.
Patent Information
- Application Number
- CN202420894642.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the injection molding process, the position of the central ring is prone to change, resulting in problems with the different axes of the rotating shaft and the central ring, and it is difficult to remove the worm gear after forming.
A molding mold is designed, including a chassis, rings, cover plates and top rods. The plastic injection is injected through step-by-step injection molding, and the worm gear shaft and tooth portion are formed simultaneously, and the central ring positioning and worm gear ejection are achieved through the positioning groove and top rod.
The stable positioning of the central ring and the smooth forming and ejection of the worm gear are achieved, improving the stability and efficiency of the forming process.
Smart Images
Figure CN222610281U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding, in particular to a molding die. Background Art
[0002] The windshield wiper used in the car uses a worm to drive the worm wheel to rotate and drive the wiper arm to swing. In order to reduce the weight of the whole vehicle and facilitate lubrication operations, the worm wheel used is often set to be partly aluminum alloy and partly solidified plastic. This method improves the processing efficiency of the worm wheel, and during processing, the aluminum alloy middle ring is often processed first. The middle ring has a convex portion formed on the outer wall and a groove formed on the inner circumference. During injection molding, the operator places the middle ring in the mold and then performs injection molding. In actual operation, it is found that the position of the middle ring is easy to change, which easily causes the problem of the rotating shaft and the middle ring being out of axial alignment, and it is inconvenient to remove the worm wheel after molding. Utility Model Content
[0003] The utility model provides a molding die to solve the above-mentioned deficiencies of the prior art, facilitates the molding of the worm gear, can position the middle ring during molding, and also facilitates the ejection of the worm gear, and has strong practicality.
[0004] In order to achieve the purpose of this utility model, the following technologies are proposed:
[0005] A molding die includes a chassis, a plurality of mounting convex plates are arranged on the outer periphery of the chassis, a lower extension tube is arranged extending downwardly from the chassis, the lower end of the lower extension tube is closed, a ring is arranged on the chassis, a plurality of convex parts are arranged on the outer periphery of the ring, the convex parts are mounted on the mounting convex plates by screws, a plurality of molding teeth are arranged on the inner periphery of the ring, a cover is arranged on the upper end of the ring, an upper extension tube is coaxially molded on the cover, an end cover is arranged on the outer end of the upper extension tube, a feed pipe is connected to the end cover, a feed branch pipe is connected to the cover, a rotating seat is arranged on the lower end of the lower extension tube, a screw rod is rotatably arranged on the rotating seat, a rotating cap is arranged on the lower end of the screw rod, a moving disk is screwed on the screw rod, a plurality of ejector rods are arranged on the moving disk, and the ejector rods are passed through the chassis. The lower extension tube and the upper extension tube can be used for injection molding of the worm gear shaft, and the molding teeth on the inner wall of the ring facilitate the molding of the worm gear teeth, and the present scheme is to inject plastic by step-by-step injection molding, so as to simultaneously mold the worm gear shaft and the tooth part. In order to position the middle ring, it is necessary to open a plurality of positioning grooves at its lower end. When the push rod is passed through the middle ring, the middle ring can be positioned, and the gear can also be pushed out by moving the push rod.
[0006] Furthermore, a plurality of air holes are provided on the end cover, and the arrangement of the air holes facilitates the discharge of air therein during injection molding, thereby avoiding the presence of a large number of holes in the worm gear shaft, which would affect the strength of the worm gear shaft.
[0007] Furthermore, a lower sealing ring is provided at the lower end of the ring member, and a sealing ring groove is provided on the upper wall of the chassis, and the lower sealing ring passes through the sealing ring groove to improve the sealing effect and avoid glue overflow.
[0008] Furthermore, in order to improve the sealing effect, an upper sealing ring is provided at the upper end of the ring member, and the cover plate is located inside the upper sealing ring.
[0009] Furthermore, a plurality of support plates are installed on the cover plate, a waist-shaped hole is opened at the outer end of the support plate, a movable outer rod is passed through the waist-shaped hole, a pair of limiting nuts are provided at the upper end of the movable outer rod, the limiting nuts are located on the upper and lower sides of the support plate, a pull plate is provided at the lower end of the movable outer rod, a plurality of extended support plates are installed on the movable plate, a U-shaped groove is opened at the outer end of the extended support plate, the lower end of the movable outer rod is passed through the U-shaped groove, and when injection molding, the movable outer rod is provided due to the characteristic that the movable plate is located at the lower end, and the cover plate is fixed by the movable outer rod.
[0010] The advantages of the above technical solution are:
[0011] The utility model is convenient for molding the worm gear and can also ensure the strength of the worm gear, and is also convenient for ejecting the worm gear after molding. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.
[0013] Figure 1 The three-dimensional structure of one embodiment is shown Figure 1 .
[0014] Figure 2 The three-dimensional structure of one embodiment is shown Figure 2 .
[0015] Figure 3 A three-dimensional structural diagram of the chassis is shown.
[0016] Figure 4 A three-dimensional structural diagram of the ring is shown.
[0017] Figure 5 A three-dimensional structural diagram of the cover plate is shown. DETAILED DESCRIPTION
[0018] like Figure 1~Figure 5As shown, a molding die comprises a chassis 1, a plurality of mounting convex plates 10 are arranged on the outer periphery of the chassis 1, a lower extension tube 11 is arranged extending downwardly from the chassis 1, the lower end of the lower extension tube 11 is closed, a ring 2 is arranged on the chassis 1, a plurality of convex portions 20 are arranged on the outer periphery of the ring 2, the convex portions 20 are mounted on the mounting convex plate 10 by screws, a plurality of molding teeth 22 are arranged on the inner periphery of the ring 2, a cover plate 3 is arranged on the upper end of the ring 2, an upper extension tube 11 is coaxially formed on the cover plate 3 Tube 31, the outer end of the upper extension tube 31 is provided with an end cover, a plurality of air holes 33 are opened on the end cover, a feed pipe 32 is connected to the end cover, a feed branch pipe 30 is connected to the cover plate 3, a rotating seat 44 is installed at the lower end of the lower extension tube 11, a screw rod 45 is rotatably provided on the rotating seat 44, a rotating cap 46 is provided at the lower end of the screw rod 45, a moving disk 47 is screwed on the screw rod 45, a plurality of push rods 48 are provided on the moving disk 47, and the push rods 48 are passed through the chassis 1. A plurality of support plates 4 are mounted on the cover plate 3, a waist-shaped hole 40 is formed at the outer end of the support plate 4, a movable outer rod 41 is passed through the waist-shaped hole 40, a pair of limiting nuts 42 are formed at the upper end of the movable outer rod 41, the limiting nuts 42 are located at the upper and lower sides of the support plate 4, a pull plate 43 is formed at the lower end of the movable outer rod 41, a plurality of extended support plates 49 are mounted on the movable plate 47, a U-shaped groove 50 is formed at the outer end of the extended support plate 49, and the lower end of the movable outer rod 41 is passed through the U-shaped groove 50.
[0019] The lower end of the ring 2 is provided with a lower sealing ring, the upper wall of the bottom plate 1 is provided with a sealing ring groove 12, and the lower sealing ring is inserted into the sealing ring groove 12. The upper end of the ring 2 is provided with an upper sealing ring 21, and the cover plate 3 is located in the upper sealing ring 21.
[0020] When operating this embodiment, the operator first places the aluminum middle ring on the chassis 1, and before placing it, the height of the push rod 48 needs to be adjusted by the screw rod 45 so that the push rod 48 passes through the positioning groove of the middle ring.
[0021] After the middle ring is placed, the cover plate 3 is placed on the upper end of the ring 2 .
[0022] Then, the movable outer rod 41 is pushed inwardly so that the lower end of the movable outer rod 41 is inserted into the U-shaped groove 50 .
[0023] Then, the distance between the moving plate 47 and the bottom plate 1 is adjusted by the screw rod 45 , and during the adjustment, a cover 3 is provided on the upper end of the ring 2 so as to be stable and sealed.
[0024] Then, glue is injected into the cavity of the mold through the feed pipe 32 and the feed branch pipe 30 .
[0025] After the glue is cured, the distance between the movable plate 47 and the bottom plate 1 is reduced by the screw rod 45 , and when it is reduced, the movable outer rod 41 is first moved out of the U-shaped groove 50 , and the cover plate 3 is opened, and then the worm gear is pushed out by the ejector rod 48 .
[0026] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.
Claims
1. A molding die, characterized in that: The invention comprises a chassis (1), wherein the outer periphery of the chassis (1) is provided with a plurality of mounting convex plates (10), the chassis (1) is provided with a downwardly extending lower extension tube (11), the lower end of the lower extension tube (11) is closed, a ring member (2) is provided on the chassis (1), the outer periphery of the ring member (2) is provided with a plurality of convex portions (20), the convex portions (20) are mounted on the mounting convex plates (10) by means of screws, a plurality of molded teeth (22) are provided on the inner periphery of the ring member (2), a cover plate (3) is provided on the upper end of the ring member (2), and a coaxially molded An upper extension tube (31) is provided with an end cover at the outer end of the upper extension tube (31), the end cover is connected to a feed pipe (32), the cover plate (3) is connected to a feed branch pipe (30), a rotating seat (44) is installed at the lower end of the lower extension tube (11), a screw rod (45) is rotatably provided on the rotating seat (44), a rotating cap (46) is provided at the lower end of the screw rod (45), a moving disk (47) is screwed on the screw rod (45), a plurality of push rods (48) are provided on the moving disk (47), and the push rods (48) are passed through the bottom plate (1).
2. The molding die according to claim 1, characterized in that: The end cover is provided with a plurality of ventilation holes (33).
3. The molding die according to claim 1, characterized in that: A lower sealing ring is provided at the lower end of the ring member (2), a sealing ring groove (12) is provided on the upper wall of the bottom plate (1), and the lower sealing ring is inserted into the sealing ring groove (12).
4. The molding die according to claim 1, characterized in that: An upper sealing ring (21) is provided at the upper end of the ring member (2), and the cover plate (3) is located inside the upper sealing ring (21).
5. The molding die according to claim 1, characterized in that: A plurality of support plates (4) are mounted on the cover plate (3), a waist-shaped hole (40) is formed at the outer end of the support plate (4), a movable outer rod (41) is inserted into the waist-shaped hole (40), a pair of limit nuts (42) are provided at the upper end of the movable outer rod (41), the limit nuts (42) are located at the upper and lower sides of the support plate (4), a pull plate (43) is provided at the lower end of the movable outer rod (41), a plurality of extended support plates (49) are mounted on the movable plate (47), a U-shaped groove (50) is formed at the outer end of the extended support plate (49), and the lower end of the movable outer rod (41) is inserted into the U-shaped groove (50).