Lining band mold structure and lining band

Abstract

The utility model provides a lining belt die structure which comprises an upper die body and a lower die body, a vulcanized lining belt die cavity is formed when the upper die body and the lower die body are combined, the section of the vulcanized lining belt die cavity is in a U shape, and the vulcanized lining belt die cavity comprises a horizontal section in the middle and two side edges which are obliquely symmetrical and extend upwards. The thickness of the side edge is gradually reduced in the extending direction, and the tail end of the top is an arc face. The arc surface ensures that the wing end of the lining belt product is not tangent to the elevation angle of the residual glue, so that extension tearing of two wings of the lining belt when the waste glue is torn off is avoided, the edge of the wing end is thickened through the arc closing edge, a thickness difference is formed between the wing end and the residual glue part, the waste glue is easy to tear off, the phenomenon of bad tooth shape of the lining belt product is avoided, and the service life of the lining belt product is prolonged. And the yield of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel accessories and manufacturing, in particular to a structure of a liner die and a liner. Background Art

[0002] A tire liner, also known as a flap or bead filler, is an important component of an automobile tire. It is designed to separate the inner tube from the rim, preventing the inner tube from being worn or damaged due to direct contact with the rim. In addition, the liner can also prevent the bead of the outer tire from jamming the inner tube, ensuring the normal use and safe driving of the tire. Tire liners are usually divided into two types: flat liners and curved liners. Their design features are rubber molded products with a thicker middle part and gradually thinning wings from the inside to the outside. They need to be molded with the help of a mold. The traditional preparation process often uses a special vulcanization mold to vulcanize at high temperature and then take out the liner product, and then remove the residual rubber overflowing from the wings by manual tearing or trimming with a cutter. The traditional liner forming sleeve mold is divided into an upper die body and a lower die groove. The lower die groove includes a lower cavity and side plates arranged on both sides of the lower cavity. However, since the upper edge of the traditional side plate is in a gradually decreasing thickness style, its end is tangent to the mold closing surface, and the thickness is relatively thin, the excess rubber during rubber pressing will overflow from the upper edge of the side plate to form residual rubber. Due to the limited mold accuracy and the wear of the mold closing surface, the overflowing residual rubber is often uneven in thickness, resulting in the phenomenon that the operator is prone to tear the wing end of the liner or have tooth-like defects at the wing end when removing the waste rubber. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a structure of a liner die, which overcomes the situation of tearing the wing end of the liner or having tooth-like defects at the wing end when removing the waste rubber, improves the processing performance and quality requirements of the liner, and ensures the product qualification rate.

[0004] To solve the above technical problems, the utility model provides a structure of a liner die, including an upper die body and a lower die body. When the upper die body and the lower die body are molded together, a vulcanized liner die cavity is formed. The cross-section of the vulcanized liner die cavity is in a "U" shape, including a horizontal section in the middle and two inclined and symmetric sides extending upward. The thickness of the side gradually decreases along its extending direction and the top end is an arc surface.

[0005] In a preferred embodiment: the lower die body includes a mold closing surface and a lower cavity recessed along the thickness direction of the mold closing surface. In the molded state, the top of the arc surface is higher than the mold closing surface.

[0006] In a preferred embodiment: the curvature rate of the arc surface is not greater than 135 and not less than 90.

[0007] In yet another preferred embodiment, a liner is included. The liner is vulcanized and formed using a liner mold structure described in any one of the above embodiments. The liner is a ring body corresponding to the rim groove, and its cross-section is adapted to the vulcanized liner mold cavity.

[0008] In yet another preferred embodiment, the liner includes a middle section of the liner located at the bottom and wing ends connected to both sides of the middle section of the liner and extending upward.

[0009] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0010] The present utility model provides a liner mold structure. By designing the top ends of both sides of the vulcanized liner mold cavity into arc surfaces, it is ensured that the wing ends of the liner product do not tangent to the residual glue elevation angle, thereby avoiding the extension tear of both wings of the liner when tearing off the waste glue. And through the arc edge closing, the edges of the wing ends are thickened, forming a thickness difference between the wing ends and the residual glue part. This not only makes it easier to tear off the waste glue but also eliminates the phenomenon of tooth-shaped defects in the liner product, improving the yield rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view illustration of the side plate of the existing lower mold body;

[0012] Figure 2 It is an illustration of the poor tear of the edge of the liner wing end;

[0013] Figure 3 It is an illustration of the tooth-shaped defect of the edge of the liner wing end;

[0014] Figure 4 It is a top view illustration of the lower mold body of the present utility model;

[0015] Figure 5 For Figure 4 partial enlarged view;

[0016] Figure 6 It is an illustration of the relative arrangement of the liner of the present utility model and the rim. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] The running-in situation between the upper die body 11' and the lower die body 13' of the existing liner die structure is as Figure 1 shown. When they are die-closed, a vulcanized liner die cavity 12' can be formed. The upper edge of the vulcanized liner die cavity 12' is in a gradually thinned style, and its end tangentially intersects with the die-closed surface a. In addition, due to its thin thickness, the excess rubber during the rubber pressing molding will overflow over the die-closed surface a to form overflowing residual rubber. Since the traditional preparation process often uses a special vulcanization mold to vulcanize at high temperature and then takes out the liner product, and then removes the residual rubber overflowing from the two-wing edges by manual tearing or cutter trimming, in actual use, due to limited mold accuracy, wear of the die-closed surface, etc., the overflowing waste rubber often has uneven thickness, resulting in the phenomenon that it is easy to tear the wing end of the liner or have tooth-shaped defects at the wing end when the operator removes the waste rubber, as Figures 2-3 shown.

[0021] Referring to Figure 4 shown, this embodiment provides a liner die structure. The liner die structure includes an upper die body 11 and a lower die body 13. The upper die body 11 and the lower die body 13 are detachably covered and connected. When the upper die body 11 and the lower die body 13 are die-closed, a vulcanization die cavity 12 for preparing a liner can be formed at their covering position. Specifically, the lower die body includes a die-closed surface a and a lower cavity recessed downward along the thickness direction of the die-closed surface a. When the upper die body 11 and the lower die body 13 are detachably covered and connected, a vulcanized liner die cavity 12 is formed. The cross-section of the vulcanized liner die cavity 12 is in a "U" shape (not fully shown in the figure), including a horizontal section in the middle and two symmetrically inclined and upwardly extending side edges. The thickness of the side edges gradually decreases along their extending direction and the top end is an arc surface b. Referring to Figure 5As shown, from the perspective of the spatial relative position relationship, the arc surface b of the vulcanized lining belt cavity bulges upward against the die closing direction of the die joint surface. From the perspective of the microscopic structure, the curvature of its curved surface is set to be not greater than 135 and not less than 90. Since the top of the arc surface b is higher than the die closing surface a, it can not only ensure that the wing edge of the lined belt product molded by die pressing does not tangent to the waste rubber elevation angle, but also the arc-shaped guiding surface formed at the end position of the lined belt can prevent the extension and tearing towards the two wings of the lined belt when tearing the waste rubber. In addition, since the end is the arc surface b and its thickness increases, there is a thickness difference at the connection and tearing position between the waste rubber and the arc surface b, and the waste rubber can be torn off more easily without leaving tooth-shaped defects.

[0022] In addition, the present utility model also provides a lined belt 21 vulcanized and formed by using the above-mentioned lined belt die structure. Refer to Figure 6 As shown, the lined belt 21 is a ring body corresponding to the rim groove. The ring body is tightly fitted with the rim groove and is used to separate the inner tube from the rim, prevent the inner tube from being damaged due to direct contact with the rim, prevent the bead of the outer tire from jamming the inner tube, and ensure the normal use and safe driving of the tire. From the external structure, the cross-section of the lined belt 21 is adapted to the vulcanized lined belt cavity and is in a "U" shape. Its structural composition includes a middle section 211 of the lined belt located at the bottom, and wing ends 212 connected to both sides of the middle section 211 of the lined belt and extending upward. The thickness of the wing ends 212 gradually decreases along its extending direction and the end is an arc surface.

[0023] As mentioned above, only the preferred specific implementation manners of the present utility model are described, but the design concept of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, making non-substantial modifications to the present utility model using this concept, shall fall within the scope of infringement of the protection scope of the present utility model.

Claims

1. A lining belt mold structure, characterized in that: The invention comprises an upper mold body (11) and a lower mold body (13). When the upper mold body (11) and the lower mold body (13) are molded together, a vulcanized lining mold cavity (12) is formed. The cross section of the vulcanized lining mold cavity (12) is "U"-shaped, including a horizontal section in the middle and two inclined symmetrical and upwardly extending side edges. The thickness of the side edges gradually decreases along the extension direction thereof and the top end is a circular arc surface (b).

2. A lining strip mold structure according to claim 1, characterized in that: The lower mold body (13) comprises a mold surface (a) and a lower mold cavity recessed along the thickness direction of the mold surface. In a mold-closed state, the top of the arc surface (b) is higher than the mold surface (a).

3. A lining strip mold structure according to claim 2, characterized in that: The curvature of the arc surface (b) is not greater than 135 and not less than 90.

4. A lining tape, characterized in that A lining strip mold structure as described in any one of claims 1 to 3 is used for vulcanization molding.

5. A lining tape according to claim 4, characterized in that: The lining strip (21) is a ring body corresponding to the rim groove, and its cross section is adapted to the vulcanized lining strip mold cavity (12).

6. A lining tape according to claim 5, characterized in that: The lining belt (21) comprises a lining belt middle section (212) located at the bottom and wing ends (211) connected to both sides of the lining belt middle section (212) and extending upward.

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