Injection mold for plastic parts on steering wheel

Abstract

The utility model relates to injection mold technical field discloses a kind of steering wheel upper plastic injection mold, including base, main body two, main body one and the template one and template two of sliding connection in the top of main body two, the lock head with spring in bottom, top with press column is connected in the front side slot of template one, slot is equipped with notch two, the conical body with notch is fixed in the front side of template two, when lock head is inserted into slot and is locked into notch to realize quick-release locking, the top rod driven by rotating column, internal thread, ball screw and fixed plate is equipped in base, and top rod connects mould groove to eject forming piece.The utility model realizes the quick assembly and disassembly of mould by the cooperation of lock head and conical body, solves the problem of forming piece demolding difficulty using mechanical ejecting mechanism, improves production efficiency, and guarantees product quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for a plastic part on a steering wheel. Background Technology

[0002] As an important control component of a car, the steering wheel often integrates various plastic functional and decorative parts, such as button panels, trim covers, and overlays. These plastic parts are produced using injection molding. During the injection molding process, the structural design of the mold directly affects production efficiency and product quality. Traditional injection molds often use bolt connections for mold closing and fixing. Although this connection method is stable, when cleaning, repairing, or replacing the mold core, it is necessary to use tools to disassemble the bolts one by one. The operation process is cumbersome and time-consuming, resulting in long downtime and seriously affecting the production cycle.

[0003] Furthermore, due to the complex structure of the plastic parts of the steering wheel and the high requirements for surface finish, after injection molding and cooling, the plastic parts often shrink and tightly wrap around the mold core, generating a large adhesion force. Existing simplified molds lack effective auxiliary demolding mechanisms, and operators often need to use tools to manually pry and remove the parts. This method is not only time-consuming and labor-intensive, but also leaves scratches on the surface of the plastic parts or causes deformation and damage to the parts, thereby reducing the yield of finished products and making it difficult to meet the requirements of high-quality production.

[0004] Therefore, this utility model proposes an injection mold for plastic parts on a steering wheel to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems existing in the injection molds for plastic parts on steering wheels, such as cumbersome and inefficient operation during mold assembly and disassembly, difficulty in demolding the molded plastic parts, and damage to the product surface, this utility model aims to provide an injection mold for plastic parts on steering wheels with an improved structure that can effectively solve the above problems.

[0006] This utility model provides an injection mold for a plastic part on a steering wheel, comprising: a base, a second main body fixedly connected to the top of the base, a first main body disposed on the top of the second main body, a first template and a second template slidably connected to the top of the second main body, and a quick-release locking structure located between the first template and the second template.

[0007] The template has a slot on its front side, and a lock head is connected to the upper and lower sides of the slot. A spring is fixedly connected to the bottom of the lock head, and a push post is fixedly connected to the top of the lock head. The slot inside the template also has a recess. A cone is fixedly connected to the front side of the template, and a lock opening is provided on the upper and lower sides of the cone.

[0008] Furthermore, the first template, the second template, the cone, and the lock head are connected by the cone being inserted into the slot on the front side of the first template. The lock head is engaged in the lock opening under the action of the spring to complete the fixed connection. The push post is pressed by force to retract the lock head into the second recess so as to separate it from the lock opening, thereby achieving rapid assembly and disassembly of the mold.

[0009] Preferably, a fixing plate is connected inside the base, and a top rod is fixedly connected to the top of the fixing plate. The top rod is connected to the mold groove inside the first template and the second template. A ball screw is fixedly connected to the bottom of the fixing plate, and a rotating column is fixedly connected to the bottom of the ball screw. An internal thread is fixedly connected inside the rotating column. The rotating column is connected to the ball screw through the internal thread and drives the ball screw to rotate, thereby realizing the automatic ejection of the molded part by mechanical transmission.

[0010] Preferably, the top four sides of the second main body are fixedly connected with tenons, and the bottom four sides of the first main body are provided with mortises that are adapted to the tenons. The first main body and the second main body are connected by the tenons and the mortises to ensure the stability and positioning accuracy of the external main frame connection.

[0011] Preferably, the first template is fixedly connected to the front and rear sides with cylinders, and the bottom of the first body and the top of the second body are respectively provided with slots adapted to the cylinders. The first template and the second template slide into the interior of the second body through the cylinders and are fixed together with the slots at the bottom of the first body to ensure the stability of the internal mold assembly installation.

[0012] Preferably, a baffle is slidably connected inside the first mold plate. The baffle slides within the grooves inside the first mold plate and the second mold plate. The sliding baffle can flexibly divide the internal space of the mold to adapt to injection molding requirements of different specifications or quantities.

[0013] Preferably, the top of the main body has a hole that extends through to the surfaces of the template and the template, and a round cover is rotatably connected to the hole. The hole serves as an injection inlet, and the round cover is used to seal the hole when not in the injection molding state.

[0014] Preferably, a rotating shaft is rotatably connected to the round cover, and the rotating shaft assists the round cover to rotate on the top of the main body, so as to realize the convenient opening and closing of the round cover.

[0015] Preferably, a handle is fixedly connected to the top of the round cover, which facilitates the operator to grip and apply force to operate the round cover.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model solves the problem of cumbersome operation and low efficiency in the assembly and disassembly of injection molds in the prior art by setting a quick-release locking mechanism composed of a lock head, spring, push post and cone between template one and template two. It achieves the convenient effect of automatic locking by simply pushing in and quick separation by pressing, which significantly improves the efficiency of mold assembly and disassembly and reduces the labor intensity of operators.

[0018] 2. This utility model solves the problems of jamming, difficulty in manual removal, and damage to the product surface of molded plastic parts during demolding by setting a mechanical ejection mechanism consisting of a rotating column, internal thread, ball screw, and ejector rod inside the base. It achieves the effect of smoothly and evenly ejecting the molded parts by rotation drive, effectively ensuring the integrity and surface quality of the plastic parts and improving the production yield.

[0019] 3. This utility model solves the problem of fixed and single injection space in existing molds, which cannot flexibly adapt to different specifications or quantities of injection needs, by setting a sliding baffle inside the template. It achieves the effect of freely dividing the mold cavity space according to actual production needs, realizing simultaneous injection of multiple molds or adjusting the injection volume, thus enhancing the versatility and practicality of the mold. Attached Figure Description

[0020] Figure 1 A perspective view of an injection mold for a plastic part on a steering wheel according to this utility model;

[0021] Figure 2 This is a front view of an injection mold for a plastic part on a steering wheel, as proposed in this utility model.

[0022] Figure 3 This is a split view of the main body two in the injection mold of a plastic part on a steering wheel according to the present invention;

[0023] Figure 4 This is a cross-sectional view of template one in an injection mold for a plastic part on a steering wheel, as proposed in this utility model.

[0024] Figure 5 for Figure 4 Enlarged view of point A;

[0025] Figure 6 This is a cross-sectional view of the base in the injection mold of a plastic part for a steering wheel, as proposed in this utility model.

[0026] Legend:

[0027] 1. Main body one; 2. Main body two; 3. Base; 4. Round cover; 5. Handle; 6. Template one; 7. Template two; 8. Cylinder; 9. Button; 10. Lock head; 11. Spring; 12. Notch two; 13. Cone; 14. Locking hole; 15. Rotating shaft; 16. Fixing plate; 17. Top rod; 18. Ball screw; 19. Rotating column; 20. Tenon column; 21. Baffle; 22. Internal thread. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 6 This utility model provides an injection mold for a plastic part on a steering wheel, which aims to solve the problems of cumbersome mold assembly and disassembly and difficulty in demolding the molded part in the prior art. Figure 1 and Figure 2As shown, the injection mold for the plastic part on the steering wheel includes a base 3 and a main body 2 fixedly connected to the top of the base 3. The main body 2 serves as the main support frame structure, with a main body 1 on top. The main body 1 acts as a top cover, working with the main body 2 to limit the internal mold. Tenons 20 are fixedly connected to the top of the main body 2. The bottom of the main body 1 has mortises around the perimeter that fit the tenons 20. The main body 1 and the main body 2 are connected through the tenons 20 and mortises, achieving quick and stable positioning and installation between them. Template 6 and template 7 are slidably connected to the top of the main body 2. Template 6 and template 7 are core components for forming the injection cavity. Cylinders 8 are fixedly connected to the front and rear sides of template 6. The bottom of the main body 1 and the top of the main body 2 have slots that fit the cylinders 8. Template 6... Template 2 7 slides into the interior of main body 2 2 via cylinder 8 and is fixed by engaging with the groove at the bottom of main body 1 to prevent mold displacement during injection molding. A baffle 21 is slidably connected inside template 1 6. The baffle 21 slides within the grooves inside template 1 6 and template 2 7. The baffle 21 is used to divide the space formed by template 1 6 and template 2 7 into multiple small spaces, thereby enabling simultaneous injection molding of more molds and improving production efficiency. A hole is opened at the top of main body 1, penetrating to the surface of template 1 6 and template 2 7. The hole serves as the inlet for the injection liquid. Two round covers 4 are rotatably connected to the holes. A rotating shaft 15 is rotatably connected to the two round covers 4. The rotating shaft 15 assists the round covers 4 to rotate at the top of main body 1. A handle 5 is fixedly connected to the top of the round cover 4. The handle 5 is used by the operator to hold and open and close the round cover 4.

[0031] It also includes a quick-release locking assembly set between template 1 6 and template 2 7. Template 1 6 has a slot on its front side, and a lock head 10 is connected to the upper and lower sides of the slot. The lock head 10 is a movable locking component. A spring 11 is fixedly connected to the bottom of the lock head 10, and a push post 9 is fixedly connected to the top of the lock head 10. The spring 11 is used to provide a reset elastic force for the lock head 10, and the push post 9 is used to receive external pressing pressure to drive the lock head 10 to move. A recess 2 12 is also opened in the slot inside template 1 6. The recess 2 12 provides space for the lock head 10 to retract. A cone 13 is fixedly connected to the front side of template 2 7. The cone 13 is an insertion fitting component. Locking slots 14 are opened on the upper and lower sides. The position of the locking slots 14 corresponds to the lock head 10 and is used to receive the lock head 10 to achieve a snap-fit.

[0032] When connecting template 16 and template 27, align the cone 13 on template 27 with the slot on the front of template 16 and insert it. Since the two locking heads 10 in the slot of template 16 are close together, the conical front of the cone 13 will first press against the locking head 10, causing the locking head 10 to be compressed by the spring 11 and retract its front end into the recess 22. As the cone 13 is continuously inserted, when the locking port 14 on the cone 13 moves to the position of the locking head 10, the spring 11 returns to its original position and pushes the locking head 10 into the locking port 14. Inside, the automatic locking and fixing of template 1 6 and template 2 7 is completed, realizing the rapid splicing of the mold and greatly improving the assembly efficiency. When it is necessary to separate template 1 6 and template 2 7 to remove the molded plastic part, the operator only needs to press the push post 9. The push post 9 squeezes the rear end of the locking head 10, and the locking head 10 squeezes the spring 11 again and retracts the front end into the recess 2 12. At this time, the locking head 10 and the locking mouth 14 disengage, and template 2 7 can be easily removed from template 1 6, realizing convenient disassembly of the mold.

[0033] like Figure 6 As shown, in a preferred embodiment, in order to achieve automatic ejection and demolding of the molded plastic part, a fixed plate 16 is connected inside the base 3, and an ejector rod 17 is fixedly connected to the top of the fixed plate 16. Each ejector rod 17 is connected to the mold groove inside the first mold plate 6 and the second mold plate 7. The position of the ejector rod 17 corresponds to the mold cavity and is used to directly apply ejection force to the molded part. A ball screw 18 is fixedly connected to the bottom of the fixed plate 16, and a rotating column 19 is fixedly connected to the bottom of the ball screw 18. An internal thread 22 is fixedly connected inside the rotating column 19. The rotating column 19 is connected to the ball screw 18 through the internal thread 22. The rotating column 19 serves as a power input end and can be powered by a handwheel or a motor. The rotating column 19 drives the ball screw 18 to rotate, thereby driving the fixed plate 16 and the ejector rod 17 to perform linear lifting and lowering movements.

[0034] As another preferred embodiment, in order to improve the smoothness and positioning accuracy of the baffle 21 sliding inside the mold, the side wall of the baffle 21 and the groove side wall inside the template 1 6 and template 2 7 adopt a precision sliding fit. The movement of the baffle 21 can flexibly adjust the size of the segmented space inside the mold to adapt to the injection molding requirements of plastic parts of different specifications.

[0035] As a preferred embodiment, in order to facilitate the injection of molding raw materials and the observation and cleaning of the inside of the mold, the hole at the top of the main body 1 is designed to be a sufficiently large operating port. The round cover 4 above the hole can be flexibly rotated through the rotating shaft 15. The handle 5 on the round cover 4 is designed in accordance with ergonomics, making it easy for operators to grip and apply force. After the injection molding is completed, the round cover 4 can be opened through the handle 5 to clean the mold or assist in heat dissipation.

[0036] Working principle: Before using this mold to produce steering wheel plastic parts through injection molding, the mold needs to be assembled and fixed first. The operator uses the main body 2 as a support to ensure its stability. The top of the main body 2 is fixedly connected with tenons 20 around the perimeter. The bottom of the main body 1 has mortises around the perimeter that fit the tenons 20. The operator aligns the main body 1 with the main body 2. Through the tight connection of the tenons 20 and the mortises, the main body 1 and the main body 2 are assembled into a stable external frame structure. Then, the internal mold components are installed. Template 1 6 and Template 2 7 are the core molding components. The front and rear sides are fixedly connected with cylinders 8. The bottom of the main body 1 and the top of the main body 2 are respectively opened with slots that fit the cylinders 8. The operator slides the template 1 6 and Template 2 7 into the interior of the main body 2 through the cylinders 8 and makes the cylinders 8 engage with the slots at the bottom of the main body 1, thereby completing the positioning and fixing of the template 1 6 and Template 2 7 within the main frame.

[0037] During the assembly of template 6 and template 7, the quick-release locking mechanism designed in this utility model plays a crucial role. Template 6 has a slot on its front side, with lock heads 10 connected to the upper and lower sides of the slot. A spring 11 is fixedly connected to the bottom of the lock head 10, and a push post 9 is fixedly connected to the top of the lock head 10. A recess 12 is also provided inside the slot of template 6. A cone 13 is fixedly connected to the front side of template 7, with locking slots 14 on the upper and lower sides of the cone 13. When it is necessary to connect template 6 and template 7, the cone 13 on template 7 is aligned with the slot on the front side of template 6 and inserted. Because the two lock heads 10 inside the slot of template 6 are close together, the cone 13... The front part of the cone 13 presses against the locking head 10, causing the locking head 10 to squeeze the spring 11 and retract its front end into the recess 12. As the cone 13 is continuously inserted, when the locking port 14 on the cone 13 moves to the position of the locking head 10, the spring 11 resets and pushes the locking head 10 into the locking port 14, thus completing the automatic locking and fixing of the template 1 6 and the template 2 7. This process does not require any additional tools and can be completed by pushing in, which greatly improves the efficiency of mold assembly. If it is necessary to adjust the internal space of the mold to accommodate multi-mold injection, the space composed of the template 1 6 and the template 2 7 can be divided into multiple independent small spaces by sliding the baffle 21 connected inside the template 1 6.

[0038] When the injection molding operation begins, the operator holds the handle 5 to open the round cover 4, exposing the hole that runs from the top of the main body 1 through to the surface of the mold. The injection material is injected through the hole. After the injection is completed, the round cover 4 is rotated by the rotating shaft 15 to close the hole. After the plastic part cools and solidifies, the demolding operation is required. At this time, the press post 9 is pressed first. The press post 9 presses the rear end of the locking head 10. The locking head 10 presses the spring 11 again and retracts the front end into the recess 12. At this time, the locking head 10 is disengaged from the locking opening 14, and the template 2 7 can be separated from the template 6 and taken out.

[0039] Subsequently, the mechanical ejection mechanism inside the base 3 begins to operate to assist in demolding. The base 3 is internally connected to a fixed plate 16, with ejector rods 17 fixedly connected to the top of the fixed plate 16. Each ejector rod 17 is connected to a mold groove inside template 1 6 and template 2 7. A ball screw 18 is fixedly connected to the bottom of the fixed plate 16, and a rotating column 19 is fixedly connected to the bottom of the ball screw 18. An internal thread 22 is fixedly connected inside the rotating column 19. The operator drives the rotating column 19 to rotate via a handwheel or motor. The rotating column 19 connects to the ball screw 19 via the internal thread 22. The ball screw 18 is connected to and drives the ball screw 18 to rotate. Because the ball part of the ball screw 18 is fixedly connected to the fixed plate 16 and the fixed plate 16 is restricted from rotating by the guide rod 17, when the rotating column 19 drives the ball screw 18 to rotate, the ball part on the ball screw 18 drives the fixed plate 16 to make an upward linear motion. The fixed plate 16 drives the ejector rod 17 to push the molded plastic part upward, thereby realizing the automatic release of the plastic part, avoiding the damage to the parts caused by manual prying, and improving the demolding efficiency and product quality.

Claims

1. A plastic injection mold for a steering wheel, comprising a base (3), a second main body (2) fixedly connected to the top of the base (3), a first main body (1) disposed on the top of the second main body (2), and a first template (6) and a second template (7) slidably connected to the top of the second main body (2); Its features are, The template (6) has a slot on its front side, and a lock head (10) is connected to the upper and lower sides of the slot. A spring (11) is fixedly connected to the bottom of the lock head (10), and a push post (9) is fixedly connected to the top of the lock head (10). A recess (12) is also provided inside the slot of the template (6). A cone (13) is fixedly connected to the front side of the template (7). Locking openings (14) are provided on the upper and lower sides of the cone (13). The cone (13) is inserted into the slot on the front side of the template (6). The lock head (10) is inserted into the locking opening (14) under the action of the spring (11) to complete the fixed connection between the template (6) and the template (7). The push post (9) is used to press the lock head (10) to retract into the recess (12) and separate it from the locking opening (14).

2. The injection mold for a plastic part on a steering wheel according to claim 1, characterized in that, The base (3) is internally connected to a fixing plate (16), and a top rod (17) is fixedly connected to the top of the fixing plate (16). The top rod (17) is connected to the mold groove inside the template one (6) and the template two (7). A ball screw (18) is fixedly connected to the bottom of the fixing plate (16), and a rotating column (19) is fixedly connected to the bottom of the ball screw (18). An internal thread (22) is fixedly connected inside the rotating column (19). The rotating column (19) is connected to the ball screw (18) through the internal thread (22) and drives the ball screw (18) to rotate.

3. The injection mold for a plastic part on a steering wheel according to claim 1, characterized in that, The top four sides of the second main body (2) are fixedly connected with tenon columns (20), and the bottom four sides of the first main body (1) are provided with mortises that are adapted to the tenon columns (20). The first main body (1) and the second main body (2) are connected by the tenon columns (20) and the mortises.

4. The injection mold for a plastic part on a steering wheel according to claim 1, characterized in that, The template (6) is fixedly connected to the front and rear sides with cylinders (8). The bottom of the main body (1) and the top of the main body (2) are respectively provided with slots that fit the cylinders (8). The template (6) and the template (7) slide into the interior of the main body (2) through the cylinders (8) and are fixed together with the slots at the bottom of the main body (1).

5. The injection mold for a plastic part on a steering wheel according to claim 1, characterized in that, A baffle (21) is slidably connected inside the template one (6), and the baffle (21) slides within the grooves inside the template one (6) and the template two (7).

6. The injection mold for a plastic part on a steering wheel according to claim 1, characterized in that, The top of the main body (1) has a hole that extends through to the surfaces of the template (6) and the template (7), and a round cover (4) is rotatably connected to the hole.

7. The injection mold for a plastic part on a steering wheel according to claim 6, characterized in that, A rotating shaft (15) is rotatably connected to the round cover (4), and the rotating shaft (15) assists the round cover (4) to rotate on the top of the main body (1).

8. The injection mold for a plastic part on a steering wheel according to claim 6, characterized in that, A handle (5) is fixedly connected to the top of the round cover (4).

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