Headrest support injection mold

Abstract

The present invention discloses a headrest bracket injection mold, comprising a fixed mold, a movable mold, a first inclined top block, a second inclined top block and a third top block; the third top block is horizontally slidably arranged in the movable mold, the first inclined top block and the second inclined top block are obliquely slidably arranged in the movable mold and the lower ends thereof are both in contact with the lower mold plate; the first inclined top block is provided with a first outer profile matching the middle outer side of the frame of the headrest bracket, and a second outer profile matching the middle inner side of the pillar of the headrest bracket; the second inclined top block is provided with a third outer profile matching the inner side of the end of the pillar of the headrest bracket, the end of the third top block is provided with a fourth outer profile matching the middle inner edge of the frame of the headrest bracket, and the fourth outer profile is spliced ​​with the first outer profile. The headrest bracket injection mold of the present invention can simultaneously solve the problems of exposed clamping wires and barbs hindering product demoulding, making the headrest bracket easy to demould and beautiful.

Description

Technical Field

[0001] The invention relates to injection molding, in particular to an injection mold for a headrest bracket. Background Art

[0002] The existing headrest bracket 200, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a frame 201 and a support 202. The frame 201 is a ring-shaped closed structure. The upper end of the support 202 is connected to the middle of the upper side of the frame 201, and the lower end of the support 202 extends outward. Figure 2 As shown, the traditional injection mold for molding this headrest bracket usually uses the center line of the pillar 202 as the dividing line a, and makes a row position 301, 302 on both sides of the dividing line a. After the injection molding is completed, the rows 301, 302 on both sides of the dividing line a are away from each other, thereby realizing the demoulding of the headrest bracket 200.

[0003] However, since the dividing line a between the two rows 301 and 302 is located on the center line of the headrest bracket 2002, a clip line will be generated on the dividing line a after injection molding, and the pillar 202 of the headrest bracket 200 will be exposed when in use, so this clip line will seriously affect the aesthetics of the headrest bracket 200. In order to eliminate this clip line or hide this clip line, a special mold needs to be designed. However, since the middle outer edge 201a, the middle inner side 201b and the inner end 202a of the pillar 202 of the frame 201 of the headrest bracket 200 are all barbed, these barbs will hinder the demoulding of the product. Therefore, the existing molds cannot solve the problem of the exposed clip line and the barbs hindering the demoulding of the product at the same time. Summary of the invention

[0004] The purpose of the present invention is to provide a headrest bracket injection mold which can solve the problems of exposed clamping wires and barbs hindering product demoulding, making it easy to demould the headrest bracket and having an aesthetically pleasing headrest bracket.

[0005] In order to achieve the above-mentioned purpose, the headrest bracket injection mold provided by the present invention comprises a fixed mold, a movable mold, a first inclined top block, a second inclined top block and a third top block; the third top block is horizontally slidably penetrated in the movable mold, the first inclined top block and the second inclined top block are obliquely slidably arranged in the movable mold and the lower ends are both in contact with the lower mold plate; the first inclined top block is provided with a first outer profile matching the middle outer side of the frame of the headrest bracket, and a second outer profile matching the middle inner side of the pillar of the headrest bracket; the second inclined top block is provided with a third outer profile matching the inner side of the end of the pillar of the headrest bracket, and the end of the third top block is provided with a fourth outer profile matching the middle inner edge of the frame of the headrest bracket, and the fourth outer profile is spliced ​​with the first outer profile; the profile of the fixed mold, the profile of the movable mold, the first outer profile and the second outer profile of the first inclined top block, the third outer profile of the second inclined top block and the fourth outer profile of the third top block form a cavity for injection molding the headrest bracket.

[0006] Compared with the prior art, the present invention sets a first inclined top block, a second inclined top block and a third top block, and sets a first outer surface and a second outer surface on the first inclined top block, sets a third outer surface on the second inclined top block, and sets a fourth outer surface on the third top block. Since the first inclined top block, the second inclined top block and the third top block can all move and leave the headrest bracket during demolding, the barbs on the headrest bracket can be prevented from hindering the demolding of the product by setting three slide positions, so that the mold can be demolded smoothly. Moreover, since this structure does not form a clamping line on the pillar of the headrest bracket, the aesthetics of the headrest bracket is greatly improved.

[0007] Preferably, a guide rib is provided on one side of the first lift block, the movable mold is provided with a first guide hole arranged in an inclined manner, and a guide groove matched with the guide rib is provided in the first guide hole. The guide rib cooperates with the guide groove to enable the first lift block to slide on the movable mold more stably and accurately.

[0008] Preferably, the movable mold is provided with a second guide hole which is arranged obliquely, and the second inclined lift block is slidably arranged in the second guide hole. The second guide hole can guide the second inclined lift block, so that the second inclined lift block can slide more stably on the movable mold.

[0009] Preferably, the headrest bracket injection mold further comprises a driving block, the driving block is fixedly connected to the fixed mold, and the driving block drives the third top block to leave the first inclined top block. The driving block is arranged to drive the third top block, so that the third top block can slide along with the movement of the movable mold, and then the headrest bracket can be automatically separated, thereby achieving the purpose of demoulding.

[0010] Specifically, the driving block is provided with an inclined driving column, the third top block is provided with an inclined hole, and the driving column is slidably inserted into the inclined hole. The driving column cooperates with the inclined hole, so that the power of the vertical movement of the movable mold drives the horizontal sliding of the third top block, thereby effectively driving the third top block to separate from the headrest bracket.

[0011] Preferably, a first guide block is provided at the lower end of the first inclined lift block, a first slide groove is provided in the first guide block, and the lower end of the first inclined lift block is slidably provided in the first slide groove; a second guide block is provided at the lower end of the second inclined lift block, a second slide groove is provided in the second guide block, and the lower end of the second inclined lift block is slidably provided in the second slide groove. The sliding cooperation between the first guide block and the first inclined lift block and the sliding cooperation between the second guide block and the second inclined lift block can make the first inclined lift block and the second inclined lift block more smoothly when tilting and sliding, thereby improving the stability of each component during demoulding.

[0012] Preferably, the movable mold includes a first mold body and a second mold body, the mold cavity corresponding to the frame of the headrest bracket is located on the first mold body, the mold cavity corresponding to the pillar of the headrest bracket is located on the second mold body, and the fixed mold is molded on the first mold body and the second mold body. By molding the fixed mold on the first mold body and the second mold body, the outer side of the pillar of the entire headrest bracket can be located within the mold surface of the fixed mold, thereby avoiding the generation of clamping lines.

[0013] Specifically, an elastic element is provided between the third top block and the movable mold, and the elastic force of the elastic element can make the third top block slide out automatically, thereby separating it from the headrest bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a headrest bracket of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the headrest bracket of the present invention from another angle.

[0016] Figure 3 It is a state diagram of the existing headrest bracket being demoulded by means of a sliding position.

[0017] Figure 4 It is a structural schematic diagram of a headrest bracket mold of the present invention.

[0018] Figure 5 It is a schematic diagram of the exploded structure of the headrest bracket mold of the present invention.

[0019] Figure 6 It is a cross-sectional view of the headrest bracket mold of the present invention when the mold is closed.

[0020] Figure 7It is a cross-sectional view of the headrest bracket mold of the present invention when the mold is opened. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0022] like Figure 4 , Figure 5 and Figure 6 As shown, the headrest bracket injection mold 100 of the present invention includes a fixed mold 1, a movable mold 2, a first inclined top block 3, a second inclined top block 4 and a third top block 5; the movable mold 2 includes a first mold body 2a and a second mold body 2b, the third top block 5 is horizontally slidably penetrated in the first mold body 2a, the first inclined top block 3 and the second inclined top block 4 are obliquely slidably arranged in the second mold body 2b and the lower ends are both slidably in contact with the lower mold plate 101; the lower side of the first inclined top block 3 is provided with a first outer surface 31 matching the middle outer edge 201a of the frame 201 of the headrest bracket 200, and the upper surface of the first inclined top block 3 is provided with a middle outer edge 201a of the support 202 of the headrest bracket 200. The outer side of the upper end of the second inclined top block 4 is provided with a third outer surface 41 matching the inner side of the end of the pillar 202 of the headrest bracket 200, and the inner end of the third top block 5 is provided with a fourth outer surface 51 matching the middle inner edge of the frame 201 of the headrest bracket 200, and the fourth outer surface 51 is spliced ​​with the first outer surface 31; the surface 1a of the fixed mold 1, the surface 2c of the movable mold 2, the first outer surface 31 and the second outer surface 32 of the first inclined top block 3, the third outer surface 41 of the second inclined top block 4 and the fourth outer surface 51 of the third top block 5 form a cavity for injection molding the headrest bracket 200. The mold cavity corresponding to the frame 201 of the headrest bracket 200 is located on the first mold body 2a, and the mold cavity corresponding to the pillar 202 of the headrest bracket 200 is located on the second mold body 2b, and the fixed mold 1 is molded on the first mold body 2a and the second mold body 2b. By molding the fixed mold 1 above the first mold body 2a and the second mold body 2b, the outer side of the pillar 202 of the entire headrest bracket 200 can be located within the mold surface of the fixed mold 1, thereby avoiding the generation of clamping lines.

[0023] For example Figure 5As shown, a guide rib 32 is provided on one side of the first inclined lift block 3, and the movable mold 2 is provided with a first guide hole 21 which is arranged obliquely, and a guide groove 21a which cooperates with the guide rib 32 is provided in the first guide hole 21. The guide rib 32 cooperates with the guide groove 21a, so that the first inclined lift block 3 can slide on the movable mold 2 more stably and accurately. The movable mold 2 is provided with a second guide hole 22 which is arranged obliquely, and the second inclined lift block 4 is slidably arranged in the second guide hole 22. The second guide hole 22 can guide the second inclined lift block 4, so that the second inclined lift block 4 can slide on the movable mold 2 more stably. The first guide hole 21 and the second guide hole 22 are arranged obliquely in a direction close to each other.

[0024] Please see again Figure 5 , the headrest bracket injection mold 100 also includes a driving block 6, the driving block 6 is fixedly connected to the fixed mold 1, and the driving block 6 drives the third top block 5 to leave the first inclined top block 3. The driving block 6 is arranged to drive the third top block 5, so that the third top block 5 can slide along with the movement of the movable mold 2, and then can automatically leave the headrest bracket 200, so as to achieve the purpose of demoulding. Specifically, the driving block 6 is provided with an inclined driving column 61, and the outer end of the third top block 5 is connected to a connecting block 5a, and the connecting block 5a is provided with an inclined hole 52, and the driving column 61 is slidably inserted into the inclined hole 52. The driving column 61 cooperates with the inclined hole 52, so that the power of the vertical movement of the movable mold 2 can drive the horizontal sliding of the third top block 5, thereby effectively driving the third top block 5 to separate from the headrest bracket 200. An elastic element 7 is provided between the outer end of the third top block 5 and the outer side of the movable mold 2. Specifically, one end of the elastic element 7 abuts against the connecting block 5a, and the other end abuts against the outer side of the movable mold 2. The elastic element 7 is a compression spring; the elastic force of the elastic element 7 can make the third top block 5 slide out automatically, thereby separating it from the headrest bracket 200.

[0025] Please see again Figure 5 and Figure 6 The lower template 101 is provided with a first guide block 8 and a second guide block 9. The first guide block 8 is located at the lower end of the first inclined lift block 3. The first guide block 8 is provided with a first slide groove 81. The lower end of the first inclined lift block 3 is slidably arranged in the first slide groove 81. The second guide block 9 is located at the lower end of the second inclined lift block 4. The second guide block 9 is provided with a second slide groove 91. The lower end of the second inclined lift block 4 is slidably arranged in the second slide groove 91. The sliding cooperation between the first guide block 8 and the first inclined lift block 3 and the sliding cooperation between the second guide block 9 and the second inclined lift block 4 can make the first inclined lift block 3 and the second inclined lift block 4 tilt and slide more smoothly, thereby improving the stability of each component during demoulding.

[0026] Based on the above, combined with Figure 6 and Figure 7 As shown, the working principle of the headrest bracket 200 mold of the present invention is described in detail as follows:

[0027] When the molds are closed, the fixed mold 1 covers the first mold body 2a and the second mold body 2b, and the third top block 5 passes through the first mold body 2a horizontally. At this time, the driving column 61 of the driving block 6 is inserted into the inclined hole 52 of the third top block 5. The first inclined top block 3 is inserted into the second mold body 2b, and the first outer surface 31 of the first inclined top block 3 is spliced ​​with the fourth outer surface 51 of the third top block 5 to form the outer side of the lower edge of the frame 201 of the headrest bracket 200. The second inclined top block 4 is inserted into the second mold body 2b, and the third outer surface 41 of the second inclined top block 4 and the second outer surface 32 of the first inclined top block 3 are supported on the lower bottom surface of the pillar 202 of the headrest bracket 200.

[0028] When the mold is opened, the movable mold 2 moves downward, and the third top block 5 moves downward with the movable mold 2. Under the action of the inclined hole 52 and the driving column 61, the third top block 5 slides horizontally relative to the movable mold 2. At this time, the fourth outer surface 51 of the third top block 5 leaves the inner edge of the middle part of the headrest bracket 200; at the same time, the first inclined top block 3 is tilted upward relative to the movable mold 2 and the lower end of the first inclined top block 3 slides in the first slide groove 81. At this time, the first outer surface 31 leaves the outer middle part of the headrest bracket 200, and the second outer surface 32 pushes the bottom of the pillar 202 of the headrest bracket 200. At the same time, the lower end of the second inclined top block 4 slides in the second slide groove 91, and the third outer surface 41 pushes the bottom of the pillar 202 of the headrest bracket 200 and breaks away from the barb at the bottom of the end of the pillar 202 of the headrest bracket 200. When the first inclined ejector block 3, the second inclined ejector block 4 and the third ejector block 5 are all separated from the headrest bracket 200, the movable mold 2 continues to move downward so that the ejector pins on the lower mold plate 101 push the headrest bracket 200, so that the entire headrest bracket 200 is separated from the movable mold 2 and demolded smoothly.

[0029] Compared with the prior art, the present invention sets a first inclined top block 3, a second inclined top block 4 and a third top block 5, and sets a first outer surface 31 and a second outer surface 32 on the first inclined top block 3, sets a third outer surface 41 on the second inclined top block 4, and sets a fourth outer surface 51 on the third top block 5. Since the first inclined top block 3, the second inclined top block 4 and the third top block 5 can all move and leave the headrest bracket 200 during demolding, the three sliding positions can prevent the barbs on the headrest bracket 200 from hindering the demolding of the product, so that the mold can be demolded smoothly. Moreover, since this structure does not form a clamping line on the pillar 202 of the headrest bracket 200, the aesthetics of the headrest bracket 200 is greatly improved.

[0030] Other structures of the mold involved in the headrest bracket injection mold 100 of the present invention are well known to ordinary technicians in the field and will not be described in detail here.

[0031] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A headrest bracket injection mold, characterized in that: It comprises a fixed mold, a movable mold, a first inclined top block, a second inclined top block and a third top block; the third top block is horizontally slidably arranged in the movable mold, the first inclined top block and the second inclined top block are obliquely slidably arranged in the movable mold and the lower ends thereof are both in contact with the lower mold plate; the movable mold comprises a first mold body and a second mold body, the mold cavity corresponding to the frame of the headrest bracket is located on the first mold body, the mold cavity corresponding to the pillar of the headrest bracket is located on the second mold body, and the fixed mold is molded on the first mold body and the second mold body; the first inclined top block is provided with a first outer surface matching the outer middle part of the frame of the headrest bracket, and a second outer surface matching the inner middle part of the pillar of the headrest bracket; the second inclined top block is provided with a The third outer surface is matched with the inner side of the end of the support column of the frame, and the end of the third top block is provided with a fourth outer surface matching the inner edge of the middle part of the frame of the headrest bracket, and the fourth outer surface is spliced ​​with the first outer surface; the surface of the fixed mold, the surface of the movable mold, the first outer surface and the second outer surface of the first inclined top block, the third outer surface of the second inclined top block and the fourth outer surface of the third top block form a cavity for injection molding the headrest bracket; the headrest bracket injection mold also includes a driving block, which is fixedly connected to the fixed mold, and the driving block drives the third top block to leave the first inclined top block; the driving block is provided with an inclined driving column, and the third top block is provided with an inclined hole, and the driving column is slidably inserted into the inclined hole.

2. The headrest bracket injection mold according to claim 1, characterized in that: A guide rib is arranged on one side of the first inclined ejector block, and a first guide hole arranged in an inclined manner is opened in the movable mold. A guide groove matching the guide rib is arranged in the first guide hole.

3. The headrest bracket injection mold according to claim 1, characterized in that: The movable mold is provided with a second guide hole which is arranged obliquely, and the second inclined ejector block is slidably arranged in the second guide hole.

4. The headrest bracket injection mold according to claim 1, characterized in that: A first guide block is provided at the lower end of the first inclined lift block, a first slide groove is provided in the first guide block, and the lower end of the first inclined lift block is slidably provided in the first slide groove; a second guide block is provided at the lower end of the second inclined lift block, a second slide groove is provided in the second guide block, and the lower end of the second inclined lift block is slidably provided in the second slide groove.

5. The headrest bracket injection mold according to claim 1, characterized in that: An elastic element is arranged between the third top block and the movable mold.

Images