A demoulding device for injection moulding a dust cover for a steering shaft of a vehicle

Abstract

The utility model provides a kind of automobile steering shaft dust cover injection uses stripping device, including mould base, wherein: the mould base detachably installs core mould assembly, the core mould assembly includes fixed core mould and movable core mould, the movable core mould is slidably set in fixed core mould inside by spring assembly, and the spring assembly is fixedly connected with fixed core mould;The overall setting of the utility model, the automobile steering shaft dust cover finished product of injection molding can be stripped from main core mould by movable core mould, preliminary stripping is completed, at this time, the automobile steering shaft dust cover finished product of injection molding will be on movable core mould, so it will reduce the contact area of the automobile steering shaft dust cover finished product of injection molding and entire core mould, finally, the automobile steering shaft dust cover finished product of injection molding can be easily taken off from movable core mould.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, and in particular to a demolding device for injection molding of automotive steering shaft dust covers. Background Technology

[0002] The automotive steering shaft dust cover is a key protective component installed in the automotive steering system. It is mainly used to protect the steering shaft (the transmission component connecting the steering wheel and the steering gear) from external contaminants, while maintaining the lubrication performance and mechanical stability of the steering system.

[0003] Automotive steering shaft dust covers are made of flexible materials (such as rubber or thermoplastic elastomers) with a corrugated surface that can stretch to accommodate the movement of the steering shaft. They can be injection molded, resulting in high production efficiency and are environmentally friendly and recyclable. However, existing mold release devices for automotive steering shaft dust covers are very inconvenient for demolding during use due to their corrugated structure.

[0004] Therefore, it is essential to invent a demolding device for injection molding of automotive steering shaft dust covers that facilitates demolding. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides a demolding device for injection molding of automotive steering shaft dust covers. The technical solution adopted is as follows: a demolding device for injection molding of automotive steering shaft dust covers includes a mold base, wherein: a core mold assembly is detachably installed on the mold base, the core mold assembly includes a fixed core mold and a movable core mold, the movable core mold is slidably sleeved inside the fixed core mold by a spring assembly, and the spring assembly is fixedly connected to the fixed core mold;

[0006] The fixed core mold includes a support shaft, a main core mold, a combination groove, and a shaft hole. The main core mold is fixedly installed on one side of the mold base via the support shaft. Several combination grooves are evenly opened on the circumferential surface of the main core mold. The support shaft and the main core mold are coaxially connected by a shaft hole.

[0007] The movable core mold includes a firing pin, a connecting piece, a core module, and a limiting ring. The firing pin is slidably installed in the shaft hole, with both ends of the firing pin extending out of the shaft hole. The connecting piece is fixedly installed at the end of the firing pin away from the support shaft. Several core modules corresponding to the combination slots are evenly fixedly installed on the circumferential surface of the connecting piece. The core modules are slidably installed in the corresponding combination slots. The limiting ring is coaxially fixedly installed on the outside of the firing pin on the side close to the support shaft. The spring assembly is sleeved on the outside of the firing pin and is located between the limiting ring and the support shaft.

[0008] The core module and the main core module together form a complete core module.

[0009] The mold base has a coaxial through-hole, and the support shaft is installed in the mounting hole.

[0010] The mold base has several wire holes evenly arranged in a ring array on one side, with the mounting hole as the center.

[0011] The end of the support shaft away from the main mandrel is fixedly fitted with a flange corresponding to the wire hole, and fasteners are fixedly fitted between the flange and the wire hole.

[0012] The main core mold has a positioning groove at one end away from the support shaft that corresponds to the connecting piece. The positioning groove is connected to the shaft hole and each combination groove. The connecting piece is slidably installed in the positioning groove.

[0013] The spring assembly includes a support ring and a compression spring. The compression spring is coaxially fixedly mounted on one side of the support ring. The support ring and the compression spring are sleeved on the outside of the firing pin. The support ring is detachably connected to the flange. The end of the compression spring away from the support ring is coaxially in contact with the limiting ring.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] The overall design of this utility model allows the finished automotive steering shaft dust cover to be demolded from the main core mold via a movable core mold, completing the initial demolding. At this point, the finished automotive steering shaft dust cover will be on the movable core mold, which reduces the contact area between the finished automotive steering shaft dust cover and the entire core mold. Finally, the finished automotive steering shaft dust cover can be easily removed from the movable core mold. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall upper structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall bottom structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the unfolded structure of the core module of this utility model.

[0019] Figure 4 This is an exploded structural diagram of the mold base and core mold assembly of this utility model.

[0020] Figure 5 This is an exploded structural diagram of the core mold assembly of this utility model.

[0021] Figure 6 This is a partially enlarged structural diagram of point A of this utility model.

[0022] In the picture:

[0023] 1. Mold base, 2. Mounting hole, 3. Threaded hole, 4. Support shaft, 5. Main core mold, 6. Combination groove, 7. Shaft hole, 8. Positioning groove, 9. Flange, 10. Impact pin, 11. Connecting piece, 12. Core module, 13. Limiting ring, 14. Supporting ring, 15. Compression spring, 16. Fastener. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Example

[0028] Reference Figure 1-6 A demolding device for injection molding of a dust cover for an automotive steering shaft includes a mold base 1, wherein: a core mold assembly is detachably installed on the mold base 1, the core mold assembly includes a fixed core mold and a movable core mold, the movable core mold is slidably sleeved inside the fixed core mold by a spring assembly, and the spring assembly is fixedly connected to the fixed core mold;

[0029] Specifically, the fixed core mold includes a support shaft 4, a main core mold 5, a combination groove 6, and a shaft hole 7. The main core mold 5 is fixedly installed on one side of the mold base 1 via the support shaft 4. Several combination grooves 6 are evenly opened on the circumference of the main core mold 5 so that the core module 12 can be separated from the main core mold 5 through the combination grooves 6. The support shaft 4 and the main core mold 5 are coaxially provided with shaft holes 7 to provide installation space for the striker 10 and limit the striker 10 to ensure the stability and smoothness of the striker 10 during movement.

[0030] Specifically, the movable core mold includes a striker 10, a connecting piece 11, a core module 12, and a limiting ring 13. The striker 10 is slidably installed in the shaft hole 7 so that when the mold is opened, the striker 10 forces the core module 12 to slide along the combination groove 6 on the main core mold 5, thereby misaligning the core module 12 with the main core mold 5 and demolding the finished automotive steering shaft dust cover from the main core mold 5. Both ends of the striker 10 extend from the shaft hole 7. The connecting piece 11 is fixedly installed at the end of the striker 10 away from the support shaft 4 so that the connecting piece 11 can be used to fix the core module 12 to the main core mold 5. Module 12 performs simultaneous control and ensures the stability between each core module 12 and the main core mold 5. Several core modules 12 corresponding to the combination groove 6 are uniformly fixedly installed on the circumferential surface of the connecting piece 11 so that the finished car steering shaft dust cover can be taken off the main core mold 5 by the movement of the core module 12. The core module 12 is slidably installed in the corresponding combination groove 6. The limiting ring 13 is coaxially fixedly installed on the outside of the impact pin 10 near the support shaft 4. The spring assembly is sleeved on the outside of the impact pin 10 and is located between the limiting ring 13 and the support shaft 4.

[0031] Specifically, the core module 12 and the main core module 5 together form a complete core module.

[0032] Specifically, the mold base 1 has a coaxial through-hole 2, and the support shaft 4 is installed in the mounting hole 2 to facilitate the positioning and disassembly of the core mold assembly.

[0033] Specifically, a number of threaded holes 3 are evenly arranged in a ring array on one side of the mold base 1 with the mounting hole 2 as the center. A flange 9 corresponding to the threaded hole 3 is fixedly installed at the end of the support shaft 4 away from the main core mold 5. Fasteners 16 (such as bolts) are fixedly installed between the flange 9 and the threaded hole 3 to fix the core mold assembly and ensure the stability of the core mold assembly installed on the mold base 1, while facilitating the disassembly of the core mold assembly later.

[0034] Specifically, the main core mold 5 has a positioning groove 8 corresponding to the connecting piece 11 at one end away from the support shaft 4. The positioning groove 8 is connected to the shaft hole 7 and each combination groove 6. The connecting piece 11 is slidably installed in the positioning groove 8 to provide installation space for the connecting piece 11 and to ensure the flatness of the assembly between the connecting piece 11, the core module 12 and the main core mold 5.

[0035] Specifically, the spring assembly includes a support ring 14 and a compression spring 15. The compression spring 15 is coaxially fixed on one side of the support ring 14. The support ring 14 and the compression spring 15 are sleeved on the outside of the impact pin 10. The support ring 14 is detachably connected to the flange 9. The end of the compression spring 15 away from the support ring 14 is coaxially in contact with the limiting ring 13 so that when the mold is opened, the impact pin 10 is subjected to pressure, and the compression spring 15 is compressed by the limiting ring 13, causing the combination groove 6 on the main core mold 5 to slide, so that the core module 12 is misaligned with the main core mold 5, thereby demolding the finished car steering shaft dust cover from the main core mold 5. Then, after the impact pin 10 loses pressure, the core module 12 is automatically reset under the action of the compression spring 15 and combined with the main core mold 5.

[0036] In this embodiment, during use, a corresponding external mold is adapted to the outside of the core module 12 and the main core mold 5, so that a complete injection cavity for the automotive steering shaft dust cover is formed between the core module 12, the main core mold 5 and the external mold, and then injection molding is performed.

[0037] After injection molding is completed, open the outer mold and then push the impact pin 10 to move (e.g., push the impact pin 10 through an electric push rod), forcing the limiting ring 13 to compress the compression spring 15, causing the combination groove 6 on the main core mold 5 to slide, so that the core module 12 is misaligned with the main core mold 5, thereby demolding the finished car steering shaft dust cover from the main core mold 5. Finally, remove the finished car steering shaft dust cover from the core module 12.

[0038] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A demolding device for injection molding of a dust cover for an automotive steering shaft, characterized in that: Includes a mold base (1), wherein: a core mold assembly is detachably installed on the mold base (1), the core mold assembly includes a fixed core mold and a movable core mold, the movable core mold is slidably sleeved inside the fixed core mold through a spring assembly, and the spring assembly is fixedly connected to the fixed core mold; The fixed core mold includes a support shaft (4), a main core mold (5), a combination groove (6), and a shaft hole (7). The main core mold (5) is fixedly installed on one side of the mold base (1) via the support shaft (4). Several combination grooves (6) are evenly opened on the circumferential surface of the main core mold (5). The support shaft (4) and the main core mold (5) are coaxially connected by a shaft hole (7). The movable core mold includes a striker (10), a connecting piece (11), a core module (12), and a limiting ring (13). The striker (10) is slidably installed in the shaft hole (7). Both ends of the striker (10) extend out of the shaft hole (7). The connecting piece (11) is fixedly installed at the end of the striker (10) away from the support shaft (4). Several core modules (12) corresponding to the combination groove (6) are evenly fixedly installed on the circumferential surface of the connecting piece (11). The core modules (12) are slidably installed in the corresponding combination groove (6). The limiting ring (13) is coaxially fixedly installed on the outside of the striker (10) near the support shaft (4). The spring assembly is sleeved on the outside of the striker (10) and is located between the limiting ring (13) and the support shaft (4). The core module (12) and the main core module (5) together form a complete core module.

2. The demolding device for injection molding of a dust cover for an automotive steering shaft as described in claim 1, characterized in that: The mold base (1) has a coaxial through hole (2), and the support shaft (4) is installed in the mounting hole (2).

3. The demolding device for injection molding of a dust cover for an automotive steering shaft as described in claim 2, characterized in that: The mold base (1) has several wire holes (3) evenly arranged in a ring array on one side with the mounting hole (2) as the center.

4. The demolding device for injection molding of a dust cover for an automotive steering shaft as described in claim 3, characterized in that: The end of the support shaft (4) away from the main core mold (5) is fixedly installed with a flange (9) corresponding to the wire hole (3), and a fastener (16) is fixedly installed between the flange (9) and the wire hole (3).

5. The demolding device for injection molding of a dust cover for an automotive steering shaft as described in claim 4, characterized in that: The main core mold (5) has a positioning groove (8) corresponding to the connecting piece (11) at one end away from the support shaft (4). The positioning groove (8) is connected to the shaft hole (7) and each combination groove (6). The connecting piece (11) is slidably installed in the positioning groove (8).

6. The demolding device for injection molding of a dust cover for an automotive steering shaft as described in claim 4, characterized in that: The spring assembly includes a support ring (14) and a compression spring (15). The compression spring (15) is coaxially fixed on one side of the support ring (14). The support ring (14) and the compression spring (15) are sleeved on the outside of the firing pin (10). The support ring (14) is detachably connected to the flange (9). The end of the compression spring (15) away from the support ring (14) is coaxially in contact with the limiting ring (13).

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