Injection mold for bumper

Abstract

The utility model discloses an injection mold for bumpers, which comprises a rear mold, an upper mold, a lower mold, an upper mold, an upper mold, a lower mold, an upper mold and a lower mold, and is characterized in that the rear mold is provided with an ejector plate connected with a cap; the limiting device comprises a reset piece and a sliding assembly, the reset piece is arranged on the ejector plate and is in linkage with the ejector plate, a sliding groove is formed in the reset piece, part of the sliding assembly is fixedly connected with the rear mold, and the reset piece is sleeved with the sliding assembly which can selectively move in the sliding groove; and the ejector plate is suitable for driving the reset piece to move after the injection mold is opened and enabling the reset piece to abut against the inner wall of the sliding groove so as to limit the moving distance of the ejector plate. According to the injection mold for the bumper, the cap can be partially reset through the limiting device, and the synchronous mold closing distance is reduced.

Description

Technical Field

[0001] The present application relates to the field of molds, and particularly to an injection mold for a bumper. Background Art

[0002] In the related art, the front and rear bumpers of vehicles are both injection molded. In order to ensure that the parting lines at both ends of the product do not leak out and the ejector block marks are not obvious, the mold mostly adopts an inner parting structure and a front mold part-taking structure. For the mold structure with inner parting and front mold part-taking, the cap needs to be opened and closed synchronously throughout the process. Due to the large stroke and long lever arm of the cap, it is easy for the cap to drop under the action of gravity, resulting in problems such as scratches on the parting surface and burrs on the product edge. Summary of the Utility Model

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the present application is to provide an injection mold for a bumper, which can partially reset the cap through a limiting device and reduce the synchronous mold closing distance.

[0004] The injection mold for a bumper according to an embodiment of the present application includes: a rear mold, on which an ejector plate connected to the cap is provided; a limiting device, which includes a reset member and a sliding assembly. The reset member is provided on the ejector plate and is linked with the ejector plate. A chute is formed on the reset member. Part of the sliding assembly is fixedly connected to the rear mold. The sliding assembly is sleeved on the reset member and can selectively move in the chute. Wherein the ejector plate is adapted to drive the reset member to move after the injection mold is opened and make the reset member abut against the inner wall of the chute to limit the moving distance of the ejector plate.

[0005] The injection mold for a bumper according to an embodiment of the present application is provided with a limiting device, which can include a reset member and a sliding assembly. The reset member can be connected to the ejector plate, and a chute cooperating with the sliding assembly is formed on the reset member. When the ejector plate drives the reset member to move after the injection mold is opened, the sliding assembly limits the moving distance of the ejector plate by abutting against the inner wall of the chute, thereby realizing partial reset of the cap, reducing the distance between the cap and the rear mold and the deformation amount of the connecting arm under the influence of the gravity of the cap, and improving the reliability of the injection mold.

[0006] In some embodiments of the present application, the sliding assembly includes: a first sliding member, the first sliding member is fixedly connected to the rear mold, and a first sliding portion and a first through hole are formed on the first sliding member; a second sliding member, a second sliding portion slidably connected to the first sliding portion is formed on the second sliding member, and a second through hole corresponding to the first through hole is also formed on the second sliding member; wherein the second sliding member is suitable for moving toward the slide groove when the injection mold is opened; and the reset member is respectively penetrated through the first through hole and the second through hole.

[0007] In some embodiments of the present application, the first sliding portion is configured as one of a slider and a slide rail, and the second sliding portion is configured as the other of the slider and the slide rail.

[0008] In some embodiments of the present application, the limiting device also includes: an elastic member, which is arranged on the side of the second sliding member away from the reset member, and one end of the elastic member abuts against the second sliding member, and the other end of the elastic member abuts against the rear mold.

[0009] In some embodiments of the present application, the injection mold also includes: a front mold, on which a guide member is provided, the guide member extends toward the rear mold, and at least a portion of the guide member is sequentially passed through the second sliding member and the first sliding member; wherein the second sliding member is suitable for sliding along the guide member and disengaging from the sliding groove when the injection mold is closed.

[0010] In some embodiments of the present application, the guide member has a first extension section and a second extension section, the first extension section is connected to the front mold and extends horizontally toward the rear mold, and the second extension section is arranged at the free end of the first extension section and extends obliquely toward the rear mold.

[0011] In some embodiments of the present application, an included angle between an extension direction of the first extension segment and an extension direction of the second extension segment is α and satisfies: 10°≤α≤30°.

[0012] In some embodiments of the present application, the first extension section forms a limiting groove, and the limiting device also includes: a fixed block, which is arranged on the front mold, and one end of the fixed block is fixedly connected to the front mold, and the other end of the fixed block abuts against the inner wall of the limiting groove.

[0013] In some embodiments of the present application, the limiting device further includes: a pressing block, which is arranged on the front mold and is arranged opposite to the resetting member in the horizontal direction.

[0014] In some embodiments of the present application, the first sliding member is formed with a third through hole penetrating in the horizontal direction, the second sliding member is formed with a fourth through hole corresponding to the third through hole, and the guiding member is inserted through the third through hole and the fourth through hole.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic structural diagram of an injection mold according to an embodiment of the present application;

[0018] Figure 2 is Figure 1 an exploded view of the limit device in

[0019] Figure 3 is a schematic structural diagram of the limit device in the injection mold when the mold is closed according to an embodiment of the present application;

[0020] Figure 4 is a schematic structural diagram of the limit device in the injection mold when the mold is opened synchronously in place according to an embodiment of the present application;

[0021] Figure 5 is a schematic structural diagram of the limit device in the injection mold when the mold is opened according to an embodiment of the present application;

[0022] Figure 6 is a schematic structural diagram of the limit device in the injection mold when the mold is partially reset according to an embodiment of the present application;

[0023] Figure 7 is a schematic structural diagram of the limit device in the injection mold when the mold is closed according to an embodiment of the present application;

[0024] Figure 8 is a schematic structural diagram of the limit device in the injection mold when the mold starts to close synchronously according to an embodiment of the present application.

[0025] Reference numerals:

[0026] 10. Injection mold;

[0027] 11. Rear mold; 111. Ejector plate; 112. Connecting arm;

[0028] 12. Limit device; 121. Reset member; 1211. Chute;

[0029] 122. Sliding component; 1221. First sliding part; 1222. Second sliding part;

[0030] 1223. First sliding portion; 1224. First through hole; 1225. Second sliding portion; 1226. Second through hole;

[0031] 1227. Third through hole; 1228. Fourth through hole; 123. Elastic component;

[0032] 124. Guide component; 1241. First extension section; 1242. Second extension section; 1243. Limit groove;

[0033] 125. Fixed block; 126. Pressing block; 13. Front mold. Detailed implementation manner

[0034] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0035] Refer to the following Figures 1 - 8 Describe an injection mold 10 for a bumper according to an embodiment of the present application. The injection mold 10 includes a rear mold 11 and a limiting device 12. A thimble plate 111 connected to the cap is provided on the rear mold 11. The limiting device 12 includes a reset component 121 and a sliding component 122. The reset component 121 is arranged on the thimble plate 111 and is linked with the thimble plate 111. A sliding groove 1211 is formed on the reset component 121. Part of the sliding component 122 is fixedly connected to the rear mold 11. The sliding component 122 is sleeved on the reset component 121 and can selectively move in the sliding groove 1211. Among them, the thimble plate 111 is adapted to drive the reset component 121 to move after the injection mold 10 is opened and make the reset component 121 abut against the inner wall of the sliding groove 1211 to limit the moving distance of the thimble plate 111.

[0036] At present, the front and rear bumpers of vehicles are all injection molded. In order to ensure that the parting lines at both ends of the product do not leak out and the ejector marks are not obvious, the mold mostly adopts an internal parting structure and a front mold part-taking structure. For the mold structure with internal parting and front mold part-taking, the cap needs to open and close the mold synchronously throughout the process. Due to the large stroke and long lever arm of the cap, it is easy to cause the cap to drop under the action of gravity, resulting in problems such as scratches on the parting surface and burrs on the product edge.

[0037] Specifically, the injection mold 10 may include a rear mold 11 and a limiting device 12. A thimble plate 111 may be provided on the rear mold 11, and the thimble plate 111 can be connected to the cap. In a specific embodiment, the thimble plate 111 and the cap may be connected by a connecting arm 112. The cap may be located on the side of the rear mold 11 facing the front mold 13. The connecting arm 112 may penetrate through the rear mold 11, and one end of the connecting arm 112 can be connected to the cap, and the other end of the connecting arm 112 can be connected to the thimble plate 111, so as to realize the linkage between the thimble plate 111 and the cap. By moving the thimble plate 111 relative to the rear mold 11, the cap can be driven to move towards the front mold 13 or the rear mold 11.

[0038] The limiting device 12 may include a reset member 121 and a sliding assembly 122. The reset member 121 may be provided on the thimble plate 111, and the reset member 121 can be linked with the thimble plate 111. It can be understood that when the thimble plate 111 moves, the thimble plate 111 can drive the cap and the reset member 121 to move synchronously. A chute 1211 may be formed on the reset member 121. The chute 1211 may be recessed towards the radial direction of the reset member 121, and the chute 1211 can extend along the axial direction of the reset member 121 for a certain distance. Part of the sliding assembly 122 can be fixedly connected to the rear mold 11. Optionally, the sliding assembly 122 and the rear mold 11 may be detachably connected by screws or bolts, and the sliding assembly 122 can be sleeved on the reset member 121. The sliding assembly 122 can move in the chute 1211. It should be noted that part of the sliding assembly 122 is fixedly connected to the rear mold 11. When the thimble plate 111 moves, it can drive the reset member 121 to move, so that the reset member 121 slides relative to the sliding assembly 122, thereby ensuring that the sliding assembly 122 can move in the chute 1211.

[0039] Further, after the injection mold 10 is opened, the thimble plate 111 can move in a direction away from the front mold 13, thereby driving the reset member 121 to move synchronously. Since part of the sliding assembly 122 is in the chute 1211 at this time, when the reset member 121 moves, the chute 1211 can move relative to the sliding assembly 122. After moving a certain distance, the sliding assembly 122 can abut against the inner wall of the chute 1211, thereby restricting the continued movement of the reset member 121, and further restricting the movement of the thimble plate 111. Since the thimble plate 111 and the cap are linked, the cap can be partially reset, reducing the distance between the cap and the rear mold 11, thereby reducing the force on the connecting arm 112, and further reducing the deformation amount of the connecting arm 112 under the influence of the gravity of the cap, improving the product yield of the injection mold 10.

[0040] It should be noted that since the ejector plate 111 is connected to the reset member 121 and the connecting arm 112 respectively, when the ejector plate 111 moves away from the front mold 13 after the injection mold 10 is opened, the reset member 121 stops moving under the influence of the sliding assembly 122, thereby affecting the connecting arm 112 to stop moving. At this time, the cap moves a certain distance towards the rear mold 11 and then stops, but the cap is not fully reset. In this case, the distance between the cap and the rear mold 11 and the force on the connecting arm 112 can be reduced. In the prior art, during the opening and closing processes of the injection mold 10, the cap is not reset, and the distance between the cap and the rear mold 11 is relatively large, which easily causes problems such as sagging. If the cap is reset at this time, the cap can only fit completely on the surface of the rear mold 11, and it is easy to have problems of interference at the internal parting position during the subsequent closing process.

[0041] In short, the injection mold 10 for a bumper according to the embodiment of the present application is provided with a limiting device 12. The limiting device 12 may include a reset member 121 and a sliding assembly 122. The reset member 121 can be connected to the ejector plate 111, and a sliding groove 1211 cooperating with the sliding assembly 122 is formed on the reset member 121. When the ejector plate 111 drives the reset member 121 to move after the injection mold 10 is opened, the sliding assembly 122 restricts the moving distance of the ejector plate 111 by abutting against the inner wall of the sliding groove 1211, thereby realizing partial reset of the cap, reducing the distance between the cap and the rear mold 11 and the deformation amount of the connecting arm 112 under the influence of the gravity of the cap, and improving the reliability of the injection mold 10.

[0042] In some embodiments of the present application, the sliding assembly 122 may include a first sliding member 1221 and a second sliding member 1222. The first sliding member 1221 can be fixedly connected to the rear mold 11, and a first sliding portion 1223 and a first through hole 1224 may be formed on the first sliding member 1221. A second sliding portion 1225 may be formed on the second sliding member 1222, and the second sliding portion 1225 can be slidably connected to the first sliding portion 1223. In some embodiments, the first sliding portion 1223 is configured as one of a slider and a slide rail, and the second sliding portion 1225 is configured as the other of a slider and a slide rail. Specifically, the first sliding portion 1223 can be configured as a slide rail, and the second sliding portion 1225 can be configured as a slider. A second through hole 1226 may also be formed on the second sliding member 1222, and the second through hole 1226 can be correspondingly arranged with the first through hole 1224. The reset member 121 can pass through the first through hole 1224 and the second through hole 1226 respectively. Since the first sliding portion 1223 and the second sliding portion 1225 can slide relative to each other, when the injection mold 10 is opened, the second sliding member 1222 can move towards the inside of the sliding groove 1211, so that a part of the sliding assembly 122 is received in the sliding groove 1211.

[0043] In some embodiments of the present application, the limiting device 12 may further include an elastic member 123, which may be arranged on the side of the second sliding member 1222 away from the reset member 121, and one end of the elastic member 123 may be able to abut against the second sliding member 1222, and the other end of the elastic member 123 may be able to abut against the rear mold 11. When the injection mold 10 is opening, the elastic member 123 may provide an elastic force to the second sliding member 1222 toward the slide groove 1211, thereby causing the second sliding member 1222 to move toward the slide groove 1211, ensuring that in the subsequent partial reset process, the second sliding member 1222 may be able to abut against the inner wall of the slide groove 1211.

[0044] In some embodiments of the present application, the injection mold 10 may further include a front mold 13, on which a guide member 124 may be provided, and the guide member 124 and the front mold 13 may be fixed by a fixing block 125, and the guide member 124 may extend toward the rear mold 11, and at least a portion of the guide member 124 may be sequentially passed through the second sliding member 1222 and the first sliding member 1221, and during the mold opening process of the injection mold 10, the sliding assembly 122 may move along the guide member 124, and the second sliding member 1222 may slide along the guide member 124 and disengage from the slide groove 1211 when the injection mold 10 is molded. Similarly, The second sliding member 1222 can also slide along the guide member 124 and move toward the slide groove 1211 when the injection mold 10 is opened. Therefore, the guide member 124 can guide the second sliding member 1222, and the guide member 124 can also limit the sliding assembly 122 during the mold closing process, wherein the first sliding member 1221 can be formed with a third through hole 1227 that penetrates in the horizontal direction, and the second sliding member 1222 is formed with a fourth through hole 1228 that corresponds to the third through hole 1227, and the guide member 124 can be respectively penetrated through the third through hole 1227 and the fourth through hole 1228.

[0045] Further, the guide member 124 may have a first extension section 1241 and a second extension section 1242. The first extension section 1241 can be connected to the front mold 13, and the first extension section 1241 can extend horizontally toward the rear mold 11. The second extension section 1242 can be provided at the free end of the first extension section 1241, and the second extension section 1242 can extend obliquely toward the rear mold 11. Specifically, the second extension section 1242 can extend obliquely toward the chute 1211. Wherein, the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 is α, satisfying the relation: 10° ≤ α ≤ 30°, that is, the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 can be any value between 10° and 30°. For example, the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 can be, but is not limited to, 10°, 15°, 20°, 25°, 30°, etc. When the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 is too small, in order to ensure that the second sliding member 1222 can move toward the chute 1211, it is necessary to increase the length of the second extension section 1242. When the second extension section 1242 is too long, it will interfere with the rear mold 11 and affect the mold closing of the injection mold 10. When the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 is too large, it will increase the friction between the second sliding member 1222 and the second extension section 1242, reducing the service life of the sliding assembly 122. Therefore, setting the included angle between the extending direction of the first extension section 1241 and the extending direction of the second extension section 1242 within the above range can ensure that the second extension section 1242 can play a guiding role for the second sliding member 1222.

[0046] In some embodiments of the present application, a limiting groove 1243 may be formed on the first extension section 1241. The limiting device 12 may further include a fixing block 125. The fixing block 125 can be provided on the front mold 13, and one end of the fixing block 125 can be fixedly connected to the front mold 13. Optionally, the fixing block 125 and the front mold 13 can be detachably connected by screws or bolts. The other end of the fixing block 125 can be abutted against the inner wall of the limiting groove 1243, so as to fix the first extension section 1241 to the front mold 13. The limiting device 12 may further include a pressing block 126. The pressing block 126 can be provided on the front mold 13, and the pressing block 126 can be disposed opposite to the reset member 121 in the horizontal direction. When the injection mold 10 is closed, the pressing block 126 can be abutted against the reset member 121 to prevent damage caused by collision between the reset member 121 and the front mold 13.

[0047] In a specific implementation of the present application, when the injection mold 10 is closed, the reset member 121 and the guiding member 124 can respectively pass through the sliding assembly 122. The sliding assembly 122 can be located at the end of the reset member 121. When the injection mold 10 is opened in place synchronously, the sliding assembly 122 moves into the chute 1211 under the influence of the second extension section 1242, and the second sliding member 1222 is received in the chute 1211 under the influence of the elastic member 123. When the injection mold 10 is opened, the guiding member 124 is separated from the sliding assembly 122. When the injection mold 10 is reset, the second sliding member 1222 abuts against the inner wall of the chute 1211. When the injection mold 10 is closed, the guiding member 124 cooperates with the sliding assembly 122. When the injection mold 10 is closed synchronously, the sliding assembly 122 slides along the second extension section 1242 and disengages from the chute 1211.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0049] In the description of the present application, the "first feature" and "second feature" may include one or more of such features.

[0050] In the description of the present application, the meaning of "a plurality" is two or more.

[0051] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0052] In the description of the present application, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An injection mold for a bumper, characterized in that, include: A rear mold, wherein the rear mold is provided with an ejector plate connected to the cover cap; The limiting device includes a reset member and a sliding assembly, the reset member is arranged on the ejector plate and linked with the ejector plate, a slide groove is formed on the reset member, part of the sliding assembly is fixedly connected to the rear mold, the sliding assembly is sleeved on the reset member and can selectively move in the slide groove; wherein The ejector plate is suitable for driving the reset member to move after the injection mold is opened and making the reset member abut against the inner wall of the slide groove to limit the moving distance of the ejector plate.

2. The injection mold for a bumper according to claim 1, characterized in that, The sliding assembly comprises: a first sliding member, the first sliding member being fixedly connected to the rear mold, and having a first sliding portion and a first through hole formed thereon; A second sliding member, wherein the second sliding member is formed with a second sliding portion slidably connected to the first sliding portion, and the second sliding member is also formed with a second through hole corresponding to the first through hole; The second sliding member is suitable for moving toward the slide groove when the injection mold is opened; the reset member is respectively penetrated through the first through hole and the second through hole.

3. The injection mold for a bumper according to claim 2, characterized in that, The first sliding portion is configured as one of a slider and a slide rail, and the second sliding portion is configured as the other of the slider and the slide rail.

4. The injection mold for a bumper according to claim 2, characterized in that, The limiting device also includes: An elastic member is arranged on a side of the second sliding member away from the reset member, and one end of the elastic member abuts against the second sliding member, and the other end of the elastic member abuts against the rear mold.

5. The injection mold for a bumper according to any one of claims 2-4, characterized in that, Also includes: A front mold, wherein a guide member is disposed on the front mold, the guide member extends toward the rear mold, and at least a portion of the guide member is sequentially passed through the second sliding member and the first sliding member; in The second sliding member is suitable for sliding along the guide member and disengaging from the slide groove when the injection mold is closed.

6. The injection mold for a bumper according to claim 5, characterized in that, The guide member has a first extension section and a second extension section, the first extension section is connected to the front mold and extends horizontally toward the rear mold, and the second extension section is arranged at the free end of the first extension section and extends obliquely toward the rear mold.

7. The injection mold for a bumper according to claim 6, characterized in that, An included angle between an extending direction of the first extending section and an extending direction of the second extending section is α and satisfies: 10°≤α≤30°.

8. The injection mold for a bumper according to claim 6, characterized in that, The first extension section forms a limiting groove, and the limiting device further comprises: A fixed block is arranged on the front mold, and one end of the fixed block is fixedly connected to the front mold, and the other end of the fixed block abuts against the inner wall of the limiting groove.

9. The injection mold for a bumper according to claim 5, characterized in that, The limiting device also includes: A pressing block is arranged on the front mold and is arranged opposite to the resetting member in a horizontal direction.

10. The injection mold for a bumper according to claim 5, characterized in that, The first sliding member is formed with a third through hole extending through the first sliding member in a horizontal direction, the second sliding member is formed with a fourth through hole corresponding to the third through hole, and the guide member is passed through the third through hole and the fourth through hole.

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