Die

Abstract

The utility model provides a mold used for manufacturing a carbon fiber hub center cover, the carbon fiber hub center cover comprises a cover body and a plurality of clamping feet, the cover body and the clamping feet are integrally formed through carbon fibers, the cover body is in a disc shape, and the clamping feet are annularly distributed on the edge of the back face of the cover body at intervals and used for being connected with a hub in a buckled mode; the mold comprises an upper mold body, a lower mold body and a sliding piece, a containing groove is formed in the top face of the lower mold body, a boss is arranged on the bottom face of the containing groove, a separable ejector block is arranged in the center of the boss, and the sliding piece comprises a plurality of sliding blocks which are annularly arranged on the peripheral side of the boss and can slide in the radial direction. According to the mold, the multiple sliding blocks capable of sliding in the radial direction are arranged in the lower mold body, the mold cavities for forming the clamping feet are formed between the sliding blocks and the bosses in the middle, the mold cavities for forming the cover bodies are formed between the bosses of the upper mold body and the lower mold body and the ejector blocks and the sliding blocks, the product manufacturing process difficulty is low, and the product manufacturing cost is low.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile hub accessories, and more particularly to a mold. BACKGROUND

[0002] The automobile hub center cover is also called a hub center decorative cover, which is generally arranged at the center of the hub to decorate the hub and cover the center of the hub. Most of the existing hub center covers have complex structures, and generally need to be fastened on the hub by the elastic force of multiple springs, which has complicated manufacturing procedures, high manufacturing cost, complicated installation and low safety performance. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a carbon fiber hub center cover and a mold thereof, which have simple structure, are easy to install and have good safety performance.

[0004] To achieve the above-mentioned purpose, the application adopts the technical scheme of providing a carbon fiber hub center cover, which comprises a cover body and multiple clamping legs formed integrally by carbon fiber. The cover body is disc-shaped, and the multiple clamping legs are arranged on the edge of the back surface of the cover body in a ring-shaped and spaced manner to fasten the hub.

[0005] In one embodiment, the clamping leg has a first end connected to the cover body and a second end away from the cover body. The thickness of the first end of the clamping leg gradually increases from the second end to the first end. The second end of the clamping leg is provided with a reverse buckle for fastening the hub, and the side wall of the reverse buckle is provided with a guide slope.

[0006] In one embodiment, the back surface of the cover body is recessed to form a circular groove. An annular support surface is formed on the peripheral side of the back surface of the cover body at the outer periphery of the groove. The clamping legs are arranged on the support surface in a ring-shaped and uniformly spaced manner.

[0007] In one embodiment, the bottom of the first end of the clamping leg extends to the edge of the side wall of the groove.

[0008] A mold is used to manufacture the above-mentioned carbon fiber hub center cover. The mold comprises an upper mold, a lower mold and a sliding member. The top surface of the lower mold is provided with a receiving groove. The bottom surface of the receiving groove is provided with a boss. The center of the boss is provided with a separable top block. The sliding member comprises multiple sliding blocks arranged in a ring-shaped manner on the outer peripheral side of the boss and capable of radially sliding. The bottom surface of the upper mold, the sliding member, the top surface of the boss and the top surface of the top block jointly form a first cavity for forming the cover body. A second cavity for forming multiple clamping legs is arranged between the inner side wall of the sliding member and the outer peripheral wall of the boss. The second cavity is in communication with the first cavity. The first cavity and the second cavity constitute a hub center cover cavity. The top block is used to eject the formed part formed in the hub center cover cavity.

[0009] In one embodiment, the upper part of the sliding member is a hollow circular truncated cone, the bottom surface of the upper die is concave and has a locking groove adapted to the circular truncated cone, the locking groove locks the sliding member when the upper die and the lower die are closed; the inner side wall of the circular truncated cone, the end surface of the top of the convex block, the end surface of the top of the top block and the top wall of the locking groove form the first cavity.

[0010] In one embodiment, the inner side wall of the sliding member is circumferentially spaced and has a concave first groove, the outer peripheral wall of the convex block is circumferentially spaced and has a second groove, and the first groove and the second groove form the second cavity.

[0011] In one embodiment, the number of the sliding blocks is three, and the inner peripheral wall of each sliding block is spaced and has the same number of first grooves.

[0012] In one embodiment, the bottom end of the convex block is provided with a base, the bottom surface of the lower die is provided with a mounting groove adapted to the base, the base is fixed in the mounting groove, and the bottom of the accommodating groove is provided with a through hole for the convex block to pass through; the top block comprises a large-diameter section and a small-diameter section coaxially arranged, the large-diameter section and the small-diameter section are both circular truncated cones with a large upper part and a small lower part, the convex block is internally provided with a first chamber adapted to the large-diameter section and a second chamber adapted to the small-diameter section, the convex block is provided with an annular platform on the inner peripheral wall of the first chamber, the large-diameter section abuts against the annular platform, and the bottom surface of the base is provided with a through hole in communication with the second chamber.

[0013] In one embodiment, the bottom surface of the accommodating groove is provided with a plurality of convex strips, the bottom surface of the sliding block is provided with a sliding groove in sliding cooperation with the convex strips, and the plurality of convex strips are circumferentially spaced along the outer peripheral side of the convex block.

[0014] The carbon fiber hub center cover provided by the application has the advantages that, compared with the prior art, the carbon fiber hub center cover of the application is provided with a plurality of clamping feet for clamping the hub at the back of the cover body in a ring shape and at intervals, the cover body and the plurality of clamping feet are integrally formed of carbon fiber material, the entire hub center cover is made of carbon fiber, the safety performance is improved, the overall structure is simple, the installation operation is convenient, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0016] Figure 1A perspective view of the carbon fiber wheel hub center cap provided in an embodiment of this application;

[0017] Figure 2 for Figure 1 A three-dimensional view of the carbon fiber wheel hub center cap from another perspective.

[0018] Figure 3 A perspective view of the mold provided in the embodiments of this application;

[0019] Figure 4 for Figure 3 Explosion diagram of the mold shown Figure 1 ;

[0020] Figure 5 for Figure 3 The longitudinal sectional view of the mold shown;

[0021] Figure 6 for Figure 3 Explosion diagram of the mold shown Figure 2 ;

[0022] Figure 7 for Figure 6 Exploded view of the sliding component in the mold shown;

[0023] Figure 8 for Figure 6 A three-dimensional view of the boss in the mold shown;

[0024] Figure 9 for Figure 8 The longitudinal sectional view of the boss shown;

[0025] Figure 10 for Figure 3 A 3D view of the mold shown;

[0026] Figure 11 for Figure 3 The diagram shows the structure of the mold when it is opened.

[0027] The following are the labeling elements in the figure:

[0028] 10 - carbon fiber wheel hub center cap; 100 - cover body; 200 - clamping leg; 110 - groove; 120 - support surface; 201 - first end; 202 - second end; 210 - undercut; 220 - guide slope; 30 - mold; 31 - upper mold; 32 - lower mold; 33 - slide; 34 - boss; 35 - top block; 36 - base; 37 - guide assembly; 310 - locking groove; 320 - accommodating groove; 321 - mounting groove; 322 - protrusion; 330 - slider; 331 - circular table; 332 - first groove body; 333 - first annular step; 334 - sliding groove; 340 - second groove body; 341 - first chamber; 342 - second chamber; 343 - second annular step; 351 - large diameter section; 352 - small diameter section; 360 - through hole. DETAILED DESCRIPTION

[0029] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0033] Please refer to Figure 1 , Figure 2The carbon fiber hub center cover 10 provided by the embodiment of the present application will be described. The carbon fiber hub center cover 10 comprises a cover body 100 and a plurality of clamping legs 200. The cover body 100 and the plurality of clamping legs 200 are integrally formed by carbon fiber. The cover body 100 is in the shape of a disc as a whole, and a vehicle logo or other logo can be arranged on the front surface of the cover body 100. The plurality of clamping legs 200 are arranged in a ring shape and at intervals on the edge of the back surface of the cover body 100. The carbon fiber hub center cover 10 can be buckled to the hub through the plurality of clamping legs 200, so that the spring type buckling can be avoided, and the safety is improved. In the embodiment, the number of the clamping legs 200 is six, and the six clamping legs 200 are arranged in a circumferential direction on the back surface of the cover body 100. It can be understood that the number of the clamping legs 200 can also be set to other numbers.

[0034] The carbon fiber hub center cover 10 provided by the present application has the plurality of clamping legs 200 arranged in a ring shape and at intervals on the back surface of the cover body 100 for buckling the hub, the cover body 100 and the plurality of clamping legs 200 are integrally formed by carbon fiber material, the entire hub center cover is made of carbon fiber, the safety is improved, the installation operation is convenient, the overall structure is simple, and the manufacturing cost is low.

[0035] The clamping leg 200 has opposite first and second ends 201 and 202. The first end 201 is connected to the cover body 100, and the second end 202 is an end away from the cover body 100. The thickness of the first end 201 of the clamping leg 200 gradually increases from the second end 202 to the first end 201, that is, the thickness of the first end 201 is gradually changed, and the closer to the cover body 100, the greater the thickness, so that the clamping leg 200 has higher structural strength.

[0036] The second end 202 of the clamping leg 200 is provided with an inverted buckle 210 away from the center of the cover body 100, and the inverted buckle 210 is buckled to the hub. The side wall of the inverted buckle 210 is provided with a guide slope 220, so that the clamping leg 200 is easily clamped into the hub through the guide slope 220, and then the inverted buckle 210 on the clamping leg 200 is smoothly buckled to the hub.

[0037] The back surface of the cover body 100 is recessed to form a groove 110, the cross section of the groove 110 is circular, and the connection between the bottom wall and the side wall of the groove 110 is smoothly transitioned. The back surface of the cover body 100 forms an annular support surface 120 around the groove 110, and the plurality of clamping legs 200 are arranged in a circumferential direction and at intervals on the support surface 120. In the embodiment, the number of the clamping legs 200 is six, and the six clamping legs 200 are arranged in a circumferential direction on the annular support surface 120 of the back surface of the cover body 100. It can be understood that the number of the clamping legs 200 can also be set to other numbers.

[0038] The bottom of the first end 201 of the clamping leg 200 extends to the edge of the sidewall of the groove 110, the bottom of the first end 201 of the clamping leg 200 is wider, and the connection between the clamping leg 200 and the cover body 100 is more stable and firm.

[0039] Referring to Figures 3 to 6 The mold 30 provided by the embodiment of the present application comprises an upper mold 31 and a lower mold 32 used in cooperation, and a sliding member 33. The upper mold 31 and the lower mold 32 are connected through a guide assembly 37, which can provide guidance for opening and closing of the mold 30. Specifically, a guide column is fixed at each of the four corners of the top surface of the lower mold 32, and a guide hole adapted to the guide column is arranged at the corresponding position of each of the four corners of the bottom surface of the upper mold 31, so that guidance for upward and downward movement during opening and closing of the mold can be provided.

[0040] Referring to Figures 4 to 6 The top surface of the lower mold 32 is provided with a receiving groove 320, the bottom surface of the receiving groove 320 is provided with a boss 34, and the center of the boss 34 is provided with a detachable top block 35. The sliding member 33 comprises a plurality of sliding blocks 330 arranged in the receiving groove 320, the plurality of sliding blocks 330 are arranged in a ring shape around the outer periphery of the boss 34 and can slide back and forth in the radial direction of the boss 34 in the receiving groove 320. The bottom surface of the upper mold 31, the sliding member 33, the top surface of the boss 34 and the top surface of the top block 35 jointly enclose a first cavity for forming a cover body. A second cavity for forming a plurality of clamping legs is arranged between the inner side wall of the sliding member 33 and the outer peripheral wall of the boss 34, and the second cavity is in communication with the first cavity, so that the first cavity and the second cavity combine to form a hub center cover cavity. That is, the side walls of both the sliding member 33 and the boss 34 are provided with groove bodies, so that a cavity for forming a clamping leg is enclosed between the side walls of the sliding member 33 and the boss 34; and a cavity for forming a cover body is jointly enclosed by the sliding member 33, the boss 34 and the top block 35 in between. After the carbon fiber raw material is placed in the mold 30 and heated and formed, the product can be pushed out of the lower mold 32 after the top block 35 is pushed.

[0041] Referring to Figures 5 to 7 and Figure 10The upper part of the sliding member 33 is a hollow circular truncated cone 331 which is large at the top and small at the bottom. The bottom surface of the upper mold 31 is recessed to form a locking groove 310 which is shaped to match the circular truncated cone 331. The end surface and the outer lateral wall of the top end of the circular truncated cone 331 are in close contact with the cavity wall of the locking groove 310. After the upper mold 31 and the lower mold 32 are closed, the sliding member 33 will not spread outwards to affect the formation of the cavity, and the locking groove 310 will lock and fix the sliding blocks 330. The upper end surface of the boss 34 is flush with the upper end surface of the top block 35. The height position of the upper end surface of the circular truncated cone 331 is set to be higher than the height position of the upper end surface of the boss 34. In this way, the first cavity can form the cover body and form a corresponding groove on the back surface of the cover body.

[0042] Specifically, the number of sliding blocks 330 is three, and the central angle of each sliding block 330 surrounded by the two side edges is 120 degrees. The three protrusions 322 are uniformly and circularly arranged in the accommodation groove 320 along the outer peripheral side of the boss 34. The bottom surface of the sliding block 330 is provided with a sliding groove 334 which is in sliding cooperation with the protrusion 322. The sliding block 330 realizes the action of being able to slide radially in the accommodation groove 320 through the sliding cooperation between the sliding groove 334 and the protrusion 322. After the product is formed, the sliding blocks 330 can be slid in the radial outward direction, so that the product is easily pushed out of the lower mold 32 by the top block 35.

[0043] Referring to Figures 6 to 8 The inner lateral wall of the sliding member 33 is circularly and spacedly provided with a first concave groove 332, and the outer peripheral wall of the boss 34 is circularly and spacedly provided with a second groove 340. The first groove 332 and the second groove 340 form a second cavity for forming a clamping leg. That is, the first groove 332 forms a cavity for the outer side part of the clamping leg, and the second groove 340 forms a cavity for the inner side part of the clamping leg. In one mode, the number of sliding blocks 330 is three, and the inner peripheral wall of each sliding block 330 is spacedly provided with the same number of first grooves 332. The clamping legs on the back surface of the cover body are provided with six, and each sliding block 330 is provided with two spaced first grooves 332. The boss 34 is provided with six second grooves 340.

[0044] Referring to Figures 6 to 9 The inner peripheral wall of the sliding member 33 is formed with a first annular step 333 near the top end, and the top end of the first groove 332 extends to the step surface of the top end of the first annular step 333. The outer peripheral wall of the boss 34 is formed with a second annular step 343 near the top end, and the second annular step 343 is flush with the step surface of the top end of the second annular step 343. The top end of the second groove 340 extends to the step surface of the top end of the second annular step 343. The first annular step 333 and the second annular step 343 are provided so that the thickness of the edge part of the cover body of the formed carbon fiber hub center cover 10 is larger, the structural strength of the center cover as a whole is improved, and the safety is higher.

[0045] The top block 35 comprises a large-diameter section 351 and a small-diameter section 352 coaxially arranged, both of which are circular truncated cones 331 with the large-diameter section 351 being larger than the small-diameter section 352 from top to bottom. The bottom surface of the small-diameter section 352 is provided with a blind groove. The boss 34 is provided with a first cavity 341 adapted to the large-diameter section 351 and a second cavity 342 adapted to the small-diameter section 352, which are in communication with each other. The boss 34 is provided with an annular table on the inner circumferential wall of the first cavity 341, and the large-diameter section 351 abuts against the annular table. The bottom surface of the base 36 is provided with a through hole 360 in communication with the second cavity 342. In this way, the ejector rod can be inserted into the second cavity 342 of the boss 34 through the through hole 360 and then into the blind groove in the bottom surface of the top block 35, so as to eject the top block 35 from the boss 34, thereby achieving the operation of pushing the product out of the lower mold 32. That is, the longitudinal section of the top block 35 is in the shape of T as a whole, and the large-diameter section 351 and the small-diameter section 352 are arranged in a structure of large at the top and small at the bottom, which is conducive to the smooth ejection of the top block 35 from the boss 34.

[0046] The bottom end of the boss 34 is provided with the base 36, and the bottom surface of the lower mold 32 is provided with a mounting groove 321 adapted in size and profile to the base 36. The base 36 is fixedly installed in the mounting groove 321 by screws. The bottom surface of the base 36 is flush with the bottom surface of the lower mold 32, or the base 36 is completely accommodated in the mounting groove 321. The bottom surface of the base 36 is provided with a through hole 360 in communication with the second cavity 342. In this way, the external ejector rod can be inserted into the boss 34 through the through hole 360 to push the top block 35 out of the boss 34, thereby completing the pushing out of the product roughcast.

[0047] Specifically, the cross section of the base 36 is a truncated triangle, that is, three angles of an equilateral triangle are respectively truncated, and the truncated portions are smoothly transitioned, having three straight edges and three arc-shaped edges. In this way, the base 36 can be installed and fixed in the lower mold 32 without distinguishing the installation direction.

[0048] The base 36 and the boss 34 can be a split structure or an integral structure. In the present embodiment, the base 36 and the boss 34 are an integral structure.

[0049] Referring to Figure 1 , Figures 4 to 6 and Figure 11 , the following describes the process of manufacturing the carbon fiber hub center cover 10 by using the mold 30 described in the above embodiments:

[0050] 1. Assemble the top block 35 into the boss 34 of the mold 30.

[0051] 2. Put the cut carbon fiber raw material into the mold 30 according to the process structure sequence.

[0052] 3、 Put the sliders 330 into the lower die 32 of the mold 30 in order according to the numbers marked on the surfaces of the sliders 330.

[0053] 4、 Put on the upper die 31, put the mold 30 into the press, and heat to form. Specifically, the mold 30 can be put into a vacuum hot-pressing tank to make the carbon fiber raw materials in the cavity solidify and form.

[0054] 5、 After a certain time of high temperature and high pressure, the resin curing is completed, that is, the resin curing reaction is completed.

[0055] 6、 After cooling, separate the upper die 31 and the lower die 32 of the mold 30 to obtain the product roughcast. First, move out the upper die 31, then radially slide out the sliders 330, push the top block 35, and take out the product roughcast from the lower die 32.

[0056] 7、 Perform surface treatment on the product roughcast to obtain the carbon fiber hub center cover 10. Specifically, oil can be sprayed on the surface of the product roughcast to form a protective layer on the surface of the center cover.

[0057] A plurality of sliders 330 that can slide radially are arranged in the lower die 32, and the sliders 330 and the middle boss 34 constitute a forming clamping leg cavity. The boss 34 of the upper die 31 and the lower die 32 and the top block 35 and the sliders 330 constitute a forming cover cavity. The product manufacturing process is low in difficulty, and the product manufacturing cost is low.

[0058] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mold for making a carbon fiber hub center cap, the carbon fiber hub center cap comprising a cap body integrally formed with carbon fiber and a plurality of clamping legs, the cap body being disc-shaped, and the plurality of clamping legs being circumferentially spaced apart on an edge of a back surface of the cap body for clamping a hub, characterized in that: The mold comprises an upper mold, a lower mold and a slider, the top surface of the lower mold is provided with a receiving groove, the bottom surface of the receiving groove is provided with a boss, the center of the boss is provided with a separable top block, the slider comprises a plurality of sliding blocks which are arranged in a ring around the outer circumferential side of the boss and can slide radially; the bottom surface of the upper mold, the slider, the top surface of the boss and the top surface of the top block jointly enclose a first cavity for forming the cover body, a second cavity for forming a plurality of clamping legs is arranged between the inner side wall of the slider and the outer circumferential wall of the boss, the second cavity is in communication with the first cavity, and the first cavity and the second cavity constitute a hub center cover cavity; the top block is used for ejecting the molded part formed in the hub center cover cavity.

2. The mold of claim 1, wherein: The upper part of the slider is a hollow circular truncated cone, the bottom surface of the upper mold is recessed to form a locking groove matched with the circular truncated cone, and each sliding block is locked by the locking groove when the upper mold and the lower mold are closed; the inner side wall of the circular truncated cone, the end surface of the top end of the boss, the end surface of the top end of the top block and the top wall of the locking groove enclose the first cavity.

3. The mold of claim 1, wherein: The inner side wall of the slider is provided with a concave first groove body arranged in a ring and spaced apart, the outer circumferential wall of the boss is provided with a second groove body arranged in a ring and spaced apart, and the first groove body and the second groove body enclose the second cavity.

4. The mold of claim 3, wherein: The number of the sliding blocks is three, and the same number of first groove bodies are arranged on the inner circumferential wall of each sliding block.

5. The mold of claim 1, wherein: The bottom end of the boss is provided with a base, the bottom surface of the lower mold is provided with a mounting groove matched with the base, the base is fixed in the mounting groove, and a through hole is formed in the groove bottom of the receiving groove for the boss to pass through; the top block comprises a large-diameter section and a small-diameter section arranged coaxially, the large-diameter section and the small-diameter section are both circular truncated cones with large upper part and small lower part, the boss is provided with a first chamber matched with the large-diameter section and a second chamber matched with the small-diameter section, the boss is provided with an annular table on the inner circumferential wall of the first chamber, the large-diameter section abuts against the annular table, and the bottom surface of the base is provided with a through hole in communication with the second chamber.

6. The mold of claim 1, wherein: The bottom surface of the receiving groove is provided with a plurality of protrusions, the bottom surface of the sliding block is provided with a sliding groove matched with the protrusions in sliding, and a plurality of protrusions are arranged in a ring and spaced apart along the outer circumferential side of the boss.

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