Mold pressing mold suitable for rubber head bolt

Abstract

The utility model belongs to the technical field of rubber head bolt processing, and provides a mould pressing mould suitable for a rubber head bolt. The mold comprises a main mold, an upper mold and a lower top plate which are matched with one another, the main mold comprises a main body and a plurality of barrier strips; the main body is of an integrally-formed structure, a plurality of special-shaped through holes are formed in the main body in an array mode, and the shapes and the sizes of the special-shaped through holes are matched with the shapes and the sizes of rubber head bolts to be machined. The barrier strips are uniformly fixed on the upper surface of the main body at intervals; the upper die is of a flat plate structure and is arranged on the upper surface of the main body during die assembly, and a gap is formed between the peripheral wall of the upper die and the inner side wall of any one of the barrier strips; a plurality of protrusions are arranged on the lower top plate in an array mode, and the protrusions and the special-shaped through holes are arranged in a one-to-one correspondence mode during demolding. The mold has the technical advantages that the demolding is simple, and the appearance of a processed product has no defect.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber head bolt processing, in particular to a molding die suitable for rubber head bolts. Background Art

[0002] The rubber head bolt is a widely used connecting component, which consists of a bolt and vulcanized rubber covering the bolt head.

[0003] The processing of the rubber head part of the existing rubber head bolt is mostly based on a semi-open molding die. The so-called semi-open mold is: the mold part corresponding to the rubber head structure of the rubber head bolt, the side plates on the four sides are essentially independent of each other, and only the triangular ribs fixed on the outer sides of the two adjacent side plates are used to abut and fix the corresponding side plates.

[0004] However, although this type of semi-open mold has the advantage of low mold cost, during the processing of the rubber head bolts, the internal pressure inside the mold is relatively high due to the glue material when filling and closing the mold. For the semi-open mold fixed only with triangular ribs, there is a risk of the mold expanding outward due to force. On the one hand, due to the deformation of the mold under force, it is also difficult to demold the processed rubber head bolts; on the other hand, the deformation of the mold causes glue overflow, which in turn causes the finished rubber head bolts to have appearance defects, thus affecting normal use. Utility Model Content

[0005] The utility model aims to provide a

[0006] In order to achieve the above purpose, the utility model proposes the following technical solutions:

[0007] A die pressing mold suitable for rubber head bolts, comprising: a main mold, an upper mold and a lower top plate that cooperate with each other;

[0008] The main mold includes a main body and a plurality of baffles; the main body is an integrally formed structure, and a plurality of special-shaped through holes are arranged in an array on the main body, and the shape and size of the special-shaped through holes are adapted to the shape and size of the rubber head bolts to be processed; the baffles are fixed on the upper surface of the main body at uniform intervals;

[0009] The upper mold is a flat plate structure, which is arranged on the upper surface of the main body when the mold is closed, and a gap is arranged between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles;

[0010] The lower top plate is provided with a plurality of protrusions in an array, and the protrusions are arranged in one-to-one correspondence with the special-shaped through holes during demoulding.

[0011] Furthermore, it comprises a plurality of buffer sleeves; the buffer sleeves are adapted and inserted into the special-shaped through holes one by one, and correspond to the thread positions of the rubber head bolts to be processed.

[0012] Furthermore, the buffer sleeve is a plastic sleeve.

[0013] Furthermore, the size range of the gap between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles is: 3-5mm.

[0014] Furthermore, the main body includes a lower main body and an upper main body which are stacked and fixed from bottom to top; the lower main body corresponds to the threaded position of the rubber head bolt to be processed; and the upper main body corresponds to the remaining position of the rubber head bolt to be processed.

[0015] Furthermore, the lower body is provided with a circle of chamfers, and the circle of chamfers is located on the outer side wall of the lower body adjacent to the upper body.

[0016] Furthermore, a limit frame is fixedly provided on the outer periphery of the lower top plate; the limit frame is fitted with an interference sleeve on the lower part of the main body.

[0017] Furthermore, the size range of the gap between the limiting frame and the lower part of the main body is: 2-4mm.

[0018] Furthermore, the upper die is provided with a plurality of lifting holes, and the lifting holes are used for lifting the upper die.

[0019] Furthermore, it comprises a plurality of lifting ears; the lifting ears are welded and fixed to an opposite outer side wall of the main mold; and an opposite outer side wall of the lower top plate.

[0020] Beneficial effects:

[0021] The technical solution provides a compression mold suitable for rubber head bolts to improve the technical defects of the current semi-open molds, such as the difficulty in demoulding and the defects in product appearance during processing.

[0022] The mold includes: a main mold, an upper mold and a lower top plate that cooperate with each other. The main mold includes a main body and a plurality of baffles; the main body is an integrated structure, and a plurality of special-shaped through holes are arranged in an array on it, and the shape and size of the special-shaped through holes are adapted to the shape and size of the rubber head bolts to be processed; the baffles are evenly spaced and fixed on the upper surface of the main body. The upper mold is a flat plate structure, which is arranged on the upper surface of the main body when the mold is closed, and a gap is provided between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles. A plurality of protrusions are arranged in an array on the lower top plate, and the protrusions are arranged one by one with the special-shaped through holes when demolding. Based on this, when processing the rubber head bolts, since the main body used to form the main structure of the rubber head bolts in the main mold is an integrated structure; therefore, the mold will not be deformed when subjected to a large internal pressure during the filling process. The overflow of glue caused by the deformation of the mold and the influence on the external structure of the rubber head bolts are avoided. At the same time, a lower top plate structure is also provided. At this time, when demolding, it is only necessary to remove the upper mold first and stack the main mold on the lower top plate. Specifically, since a gap is provided between the outer peripheral wall of the upper mold and the inner wall of any of the baffles, the difficulty of removing the upper mold is reduced. At the same time, the protrusions on the lower top plate are placed corresponding to the special-shaped through holes on the main mold, and demolding can be performed by applying downward pressure to the main mold, thereby further reducing the difficulty of demolding.

[0023] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0024] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0026] Figure 1 is a top view of the upper mold described in this embodiment;

[0027] Figure 2 is a cross-sectional view of the main mold described in this embodiment;

[0028] Figure 3 is a top view of the main mold described in this embodiment;

[0029] Figure 4 It is a three-dimensional view of the lower top plate described in this embodiment.

[0030] The reference numerals in the figure are: 1 is an upper mold, 2 is a main mold, 3 is a lower top plate, 4 is a limiting frame; 11 is a hanging hole, 21 is an upper body, 22 is a lower body, 23 is a special-shaped through hole, 24 is a buffer sleeve, 25 is a stop bar, 26 is a first lifting ear, 31 is a protrusion, and 41 is a second lifting ear. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the utility model belongs.

[0032] The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprise" include the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] In the conventional vulcanization production of rubber-head bolts, due to the large variety, simple structure and large production quantity of rubber-head bolts, rubber-head bolts are generally designed as semi-open compression molds. The molds with this structure are economical and affordable. However, the four sides of the mold are independent side panels, and triangular ribs are welded on the outside of the side panels to support the side panels. When the rubber-head bolt mold with this structure is filled with glue and molded, due to the high pressure inside the mold, the four side panels are easily forced to expand outward, and the triangular ribs welded on the outside cannot withstand the synchronous deformation outward. When removing the mold, the side panels are forced to deform and get stuck to each other, which makes it very difficult to remove the product. The product size cannot be guaranteed, and the service life of the mold is also very short. The four sides of the product leak glue, and the appearance quality of the product after trimming is poor. Based on this, the present embodiment aims to provide a compression mold suitable for rubber-head bolts to improve the above-mentioned technical defects at the same time.

[0034] The following is a further detailed introduction to the molding die for the rubber head bolts disclosed in the present invention in conjunction with the embodiments shown in the accompanying drawings.

[0035] like Figure 1-4 As shown, the mold includes: a main mold 2, an upper mold 1 and a lower top plate 3 that cooperate with each other. In terms of specific structural settings, the main mold 2 includes a main body and a plurality of baffles 25. Among them, the main body is an integrated molding structure, and a plurality of special-shaped through holes 23 are arranged in an array on it. The shape and size of the special-shaped through holes 23 are compatible with the shape and size of the rubber head bolts to be processed. The baffles 25 are fixed on the upper surface of the main body at uniform intervals. The upper mold 1 is a flat plate structure, which is arranged on the upper surface of the main body when the mold is closed, and a gap is provided between the outer peripheral wall of the upper mold 1 and the inner side wall of any of the baffles 25. A plurality of protrusions 31 are arranged in an array on the lower top plate 3. When demolding, the protrusions 31 are arranged one-to-one with the special-shaped through holes 23.

[0036] In the specific implementation, when the glue head bolt is injected, each bolt is placed in each of the special-shaped through holes 23 in turn, and then the glue is injected into the special-shaped through holes 23. At this time, since the position corresponding to the bolt in the special-shaped through hole 23 has been occupied by the bolt structure, the glue material will be filled to the position reserved for the glue head. Since the special-shaped through hole 23 is adapted to the rubber head bolt, the glue material will not flow to other areas in the special-shaped through hole 23 except the corresponding position of the rubber head. After the filling of glue is completed, the upper mold 1 is pressed down to close the mold, and after vulcanization, the lower top plate 3 is placed under the main mold 2, and the protrusions 31 are placed one by one with the special-shaped through holes 23. In this process, since the main body used to form the main structure of the rubber head bolt in the main mold is an integrated structure; therefore, the mold will not deform when subjected to a large internal pressure during the filling process. The overflow of glue caused by mold deformation and the influence on the external structure of the rubber head bolt are avoided. At the same time, a lower top plate structure is also set. At this time, when demolding, it is only necessary to remove the upper mold first and stack the main mold on the lower top plate. Specifically, since a gap is provided between the outer peripheral wall of the upper mold 1 and the inner wall of any of the baffles 25, the difficulty of removing the upper mold is reduced. At the same time, the protrusions on the lower top plate are placed corresponding to the special-shaped through holes on the main mold, and demolding can be performed by applying downward pressure to the main mold, thereby further reducing the difficulty of demolding.

[0037] In this embodiment, the size of the gap between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles is in the range of 3-5 mm. Preferably, the size of the gap between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles is 5 mm.

[0038] At the same time, in order to facilitate the alignment and installation of the lower top plate 3 during demoulding without affecting normal demoulding, a limit frame 4 is also provided. The limit frame 4 is fixed along the outer periphery of the lower top plate 3; and the limit frame 4 is fitted with the lower part of the main body in an interference sleeve. In this embodiment, the size range of the gap between the limit frame and the lower part of the main body is: 2-4mm. Preferably, the size of the gap between the limit frame and the lower part of the main body is: 3mm.

[0039] In order to facilitate the placement of the bolt, a chamfer is provided at the position where the screw rod and the bolt head are connected in the anisotropic through hole.

[0040] In order to avoid wear on the thread when processing the rubber head of the rubber head bolt. The mold is provided to also include a plurality of buffer sleeves 24. The buffer sleeves 24 are adapted to be inserted into the special-shaped through holes 23 one by one, and correspond to the thread positions of the rubber head bolts to be processed. At this time, the buffer sleeves 24 will prevent the bolt threads from directly contacting the metal mold and causing thread damage. Specifically, the material of the buffer sleeve in this embodiment is plastic, that is, the buffer sleeve 24 is a plastic sleeve.

[0041] In order to facilitate the processing of the mold, the main body includes a lower main body 22 and an upper main body 21 which are stacked and fixed from bottom to top. The lower main body 22 corresponds to the threaded position of the rubber head bolt to be processed; the upper main body 21 corresponds to the remaining position of the rubber head bolt to be processed. Specifically, the fixing method between the two is welding. Further, in order to facilitate the alignment of the lower main body 22 and the upper main body 21 during welding and fixing, a circle of chamfers is provided on the lower main body 22, and the circle of chamfers is located on the outer side wall adjacent to the lower main body 22 and the upper main body 21. Specifically, the size of the circle of chamfers is C5.

[0042] As a specific implementation, in order to facilitate the assembly and disassembly of the various parts of the mold during mold closing and demolding, a plurality of lifting ears are also provided. Specifically, the lifting ear is welded and fixed to a relatively outer side wall of the main mold, namely the first lifting ear 26. The lifting ear is also welded and fixed to a relatively outer side wall of the lower top plate; in order to limit the installation of the lower top plate 3, based on the design of the limit frame, in this embodiment, it is specifically welded on the limit frame 4, namely the second lifting ear 41. Since the thickness of the upper mold 1 is relatively small, it is not convenient to weld the lifting ears, so a plurality of lifting holes 11 are provided on the upper mold 1, and the upper mold 1 is hoisted through the lifting holes 11.

[0043] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A die for molding rubber head bolts, characterized in that: include: Main mold, upper mold and lower top plate that cooperate with each other; The main mold includes a main body and a plurality of baffles; the main body is an integrally formed structure, and a plurality of special-shaped through holes are arranged in an array on the main body, and the shape and size of the special-shaped through holes are adapted to the shape and size of the rubber head bolts to be processed; the baffles are fixed on the upper surface of the main body at uniform intervals; The upper mold is a flat plate structure, which is arranged on the upper surface of the main body when the mold is closed, and a gap is arranged between the outer peripheral wall of the upper mold and the inner side wall of any of the baffles; The lower top plate is provided with a plurality of protrusions in an array, and the protrusions are arranged in one-to-one correspondence with the special-shaped through holes during demoulding.

2. The molding die for rubber head bolts according to claim 1, characterized in that: It comprises a plurality of buffer sleeves; the buffer sleeves are adapted and inserted into the special-shaped through holes one by one and correspond to the thread positions of the rubber head bolts to be processed.

3. The molding die for rubber head bolts according to claim 2, characterized in that: The buffer sleeve is a plastic sleeve.

4. The molding die for rubber head bolts according to claim 1, characterized in that: The size range of the gap between the outer peripheral wall of the upper mold and the inner side wall of any of the blocking strips is: 3-5mm.

5. The molding die for rubber head bolts according to claim 1, characterized in that: The main body comprises a lower main body and an upper main body which are fixedly stacked from bottom to top; the lower main body corresponds to the thread position of the rubber head bolt to be processed; and the upper main body corresponds to the remaining position of the rubber head bolt to be processed.

6. The molding die for rubber head bolts according to claim 5, characterized in that: The lower body is provided with a circle of chamfers, and the circle of chamfers is located on the outer side wall of the lower body adjacent to the upper body.

7. The molding die for rubber head bolts according to claim 1, characterized in that: A limit frame is fixedly provided on the outer periphery of the lower top plate; the limit frame is fitted with an interference sleeve at the lower part of the main body.

8. The molding die for rubber head bolts according to claim 7, characterized in that: The size range of the gap between the limiting frame and the lower part of the main body is: 2-4mm.

9. The molding die for rubber head bolts according to claim 1, characterized in that: The upper die is provided with a plurality of lifting holes, and the lifting holes are used for lifting the upper die.

10. The molding die for rubber head bolts according to claim 1, characterized in that: It comprises a plurality of lifting ears which are welded and fixed on an opposite outer side wall of the main mold and an opposite outer side wall of the lower top plate.

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