A production mold for elastic pad

Abstract

The utility model belongs to the technical field of rail transit accessories, and relates to a production mold for an elastic pad, including a hinged bottom plate and a cover plate, an outer convex block surrounding the cavity is arranged on the bottom plate outside the cavity, an upper convex block matching the cavity is arranged on the inner surface of the cover plate, and a center plane matching the center convex block, a left plane matching the left convex block, and a right plane matching the right convex block are arranged on the inner surface of the upper convex block; when the mold is closed, the outer convex block is sealed and connected to the inner surface of the cover plate outside the upper convex block, the center plane and the center convex block, the left plane and the left convex block, and the right plane and the right convex block are gap-matched, and the center convex block, the center plane, the left convex block, the left plane, the right convex block, and the right plane are respectively provided with exhaust holes. The production mold for the elastic pad provided by the utility model has no flash on the formed elastic pad, thereby saving the trimming process.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit accessories and relates to a production mould for an elastic pad. Background Art

[0002] Elastic pads are important components of high-speed rail fasteners. They are used between rails and concrete sleepers to buffer the high-speed vibration and impact generated when vehicles pass through the rails, and to protect the roadbed and sleepers. Existing elastic pads are generally made of polyurethane foam.

[0003] The existing production mold of the elastic pad includes a hinged base plate and a cover plate, and a cavity for molding the elastic pad is set on the base plate. Since the gas in the cavity needs to be discharged during polyurethane foaming, there is a gap for exhaust after the base plate and the cover plate are molded together. However, while exhausting, the slurry will also overflow from the gap, resulting in flash on the molded elastic pad. After molding, the flash needs to be cut off by a tool. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a production mold for an elastic pad. The molded elastic pad has no flash, thus saving the trimming process.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A production mold for an elastic pad comprises a base plate and a cover plate which are hingedly connected to each other, wherein the base plate is provided with a cavity for forming the elastic pad, the cavity is provided with a center protrusion for forming the center hole of the elastic pad, and left and right protrusions for forming the mounting hole of the elastic pad, an outer protrusion surrounding the cavity is provided on the base plate outside the cavity, an upper protrusion matching the cavity is provided on the inner surface of the cover plate, and a center plane matching the center protrusion, a left plane matching the left protrusion, and a right plane matching the right protrusion are provided on the inner surface of the upper protrusion; when the mold is closed, the outer protrusion is sealed and connected to the inner surface of the cover plate outside the upper protrusion, the center plane and the center protrusion, the left plane and the left protrusion, and the right plane and the right protrusion are clearance-matched, and the center protrusion, the center plane, the left protrusion, the left plane, the right protrusion and the right plane are respectively provided with exhaust holes.

[0007] In the above-mentioned production mold of an elastic pad, the exhaust holes on the central protrusion, the central plane, the left protrusion, the left plane, the right protrusion and the right plane are all centrally arranged, and the axis of the exhaust hole is arranged perpendicular to the bottom plate or the cover plate.

[0008] In the above-mentioned production mold of the elastic pad, the central protrusion is provided with a central groove, the left protrusion is provided with a left groove, and the right protrusion is provided with a right groove. Preferably, the central groove and the central protrusion, the left groove and the left protrusion, and the right groove and the left protrusion are respectively of the same shape and are centrally arranged.

[0009] In the above-mentioned production mold of an elastic pad, the central groove is a concentric annular groove of the central protrusion, and a concentric planar groove is arranged on the central plane. The radial dimension of the planar groove is smaller than the inner diameter dimension of the central groove.

[0010] In the above-mentioned production mold of the elastic pad, the upper protrusion is provided with a concave-convex texture structure for forming the friction texture of the elastic pad.

[0011] In the above-mentioned production mold of the elastic pad, the central plane, the left plane and the right plane are in the same plane as the plane where the inner surface of the cover plate is located.

[0012] In the above-mentioned production mold of the elastic pad, a mounting seat is extended outwardly from the side of the bottom plate opposite to the hinged side, and a quick clamp for fixing the cover plate is provided on the mounting seat.

[0013] In the above-mentioned production mold of the elastic pad, a plurality of mutually cooperating positioning protrusions and positioning grooves are arranged between the bottom plate and the cover plate. Preferably, the positioning protrusions and positioning grooves are arranged at the corner positions.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model provides a production mold for an elastic pad, an upper convex block matching the cavity is added to the cover plate, and an outer convex block matching the cover plate is added to the bottom plate. During production, the upper convex block is embedded in the cavity, and the cover plate and the outer convex block are sealed and connected, so that the periphery of the cavity is sealed without generating flash. At the same time, the utility model sets a central plane, a left plane and a right plane on the upper convex block, and uses multiple exhaust holes to meet the exhaust requirements during production.

[0016] 2. The utility model further provides a center groove on the center protrusion, a left groove on the left protrusion, and a right groove on the right protrusion. By providing the above grooves, the exhaust capacity can be further increased. At the same time, the overflowed material can flow into the grooves to avoid the formation of flash on the inner side of the center hole and the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure numerals: 1, base plate; 2, cover plate; 3, cavity; 4, center protrusion; 5, left protrusion; 6, right protrusion; 7, outer protrusion; 8, upper protrusion; 9, center plane; 10, left plane; 11, right plane; 12, exhaust hole; 13, center groove; 14, left groove; 15, right groove; 16, plane groove; 17, mounting seat; 18, quick clamp; 19, positioning protrusion; 20, positioning groove. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings. Figure 1 :

[0020] A production mold for an elastic pad comprises a bottom plate 1 and a cover plate 2 which are hinged to each other, wherein a cavity 3 for forming the elastic pad is arranged in the bottom plate 1, a central protrusion 4 for forming a central hole of the elastic pad, a left protrusion 5 and a right protrusion 6 for forming a mounting hole of the elastic pad are arranged in the cavity 3, an outer protrusion 7 surrounding the cavity 3 is arranged on the bottom plate 1 outside the cavity 3, an upper protrusion 8 matching the cavity 3 is arranged on the inner surface of the cover plate 2, and a central protrusion 8 matching the central hole is arranged on the inner surface of the upper protrusion 8. The central plane 9 matched with the core protrusion 4, the left plane 10 matched with the left protrusion 5, and the right plane 11 matched with the right protrusion 6; when the mold is closed, the outer protrusion 7 is sealed and connected with the inner surface of the cover plate 2 outside the upper protrusion 8, and the central plane 9 and the central protrusion 4, the left plane 10 and the left protrusion 5, and the right plane 11 and the right protrusion 6 are loosely matched, and the central protrusion 4, the central plane 9, the left protrusion 5, the left plane 10, the right protrusion 6 and the right plane 11 are respectively provided with exhaust holes 12.

[0021] When in use, the polyurethane material is injected into the mold cavity 3, and then the cover plate 2 is covered for foaming. After the mold is closed, the upper protrusion 8 is embedded in the mold cavity 3, and the cover plate 2 and the outer protrusion 7 form a sealed connection. During the foaming process, the material cannot overflow from the periphery, thereby avoiding the generation of flash. The exhaust structure of this embodiment is: during foaming, the gas in the mold cavity 3 enters the corresponding exhaust holes 12 through the gaps between the central plane 9 and the central protrusion 4, the left plane 10 and the left protrusion 5, and the right plane 11 and the right protrusion 6.

[0022] In this embodiment, the exhaust holes 12 on the central protrusion 4, the central plane 9, the left protrusion 5, the left plane 10, the right protrusion 6 and the right plane 11 are all centrally arranged, and the axis of the exhaust hole 12 is arranged perpendicular to the bottom plate 1 or the cover plate 2.

[0023] In this embodiment, the gaps between the central plane 9 and the central protrusion 4, the left plane 10 and the left protrusion 5, and the right plane 11 and the right protrusion 6 are preferably only for gas to pass through, which can reduce the amount of material overflow.

[0024] Further, the central protrusion 4 is provided with a central groove 13, the left protrusion 5 is provided with a left groove 14, and the right protrusion 6 is provided with a right groove 15. By providing the central groove 13, the left groove 14 and the right groove 15 to form an exhaust cavity, the exhaust capacity can be further increased. At the same time, the above grooves can also be used as a storage cavity for overflow materials. A small amount of overflowed materials will flow into the cavity to avoid the formation of flash on the inner side of the central hole and the mounting hole. Preferably, the central groove 13 and the central protrusion 4, the left groove 14 and the left protrusion 5, and the right groove 15 and the left protrusion 5 have the same shape and are centrally arranged.

[0025] Furthermore, in order to increase the exhaust capacity of the center bump 4 and the center plane 9, the center groove 13 is a concentric annular groove of the center bump 4, and a concentric planar groove 16 is provided on the center plane 9, and the radial dimension of the planar groove 16 is smaller than the inner diameter dimension of the center groove 13.

[0026] When it is necessary to produce an anti-skid elastic pad, the upper protrusion 8 is provided with a concave-convex texture structure of the friction texture of the molded elastic pad.

[0027] Preferably, the central plane 9 , the left plane 10 and the right plane 11 are in the same plane as the plane where the inner surface of the cover plate 2 is located.

[0028] A mounting seat 17 extends outward from the side of the base plate 1 opposite to the hinged side, and a quick clamp 18 for fixing the cover plate 2 is provided on the mounting seat 17. When the mold is closed, the cover plate 2 is covered and then fixed with the quick clamp 18 to ensure that the cover plate 2 and the external protrusion 7 form a sealing structure.

[0029] A plurality of mutually cooperating positioning protrusions 19 and positioning grooves 20 are provided between the base plate 1 and the cover plate 2. Preferably, the positioning protrusions 19 and positioning grooves 20 are provided at the corner positions. By providing the positioning protrusions 19 and positioning grooves 20, the accuracy of mold closing can be increased.

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A production mold for an elastic pad, comprising a base plate (1) and a cover plate (2) which are hinged to each other, wherein a cavity (3) for forming the elastic pad is arranged in the base plate (1), and a center convex block (4) for forming a center hole of the elastic pad, and a left convex block (5) and a right convex block (6) for forming a mounting hole of the elastic pad are arranged in the cavity (3), characterized in that: An outer convex block (7) surrounding the cavity (3) is arranged on the bottom plate (1) outside the cavity (3); an upper convex block (8) matching the cavity (3) is arranged on the inner surface of the cover plate (2); a central plane (9) matching the central convex block (4), a left plane (10) matching the left convex block (5), and a right plane (11) matching the right convex block (6) are arranged on the inner surface of the upper convex block (8); when the mold is closed, the outer convex block (7) is sealed and connected to the inner surface of the cover plate (2) outside the upper convex block (8); the central plane (9) and the central convex block (4), the left plane (10) and the left convex block (5), and the right plane (11) and the right convex block (6) are clearance-matched; and the central convex block (4), the central plane (9), the left convex block (5), the left plane (10), the right convex block (6), and the right plane (11) are respectively provided with exhaust holes (12).

2. A production mold for an elastic pad according to claim 1, characterized in that: The central convex block (4) is provided with a central groove (13), the left convex block (5) is provided with a left groove (14), and the right convex block (6) is provided with a right groove (15).

3. A production mold for an elastic pad according to claim 2, characterized in that: The central groove (13) is a concentric annular groove of the central protrusion (4), and a concentric planar groove (16) is provided on the central plane (9). The radial dimension of the planar groove (16) is smaller than the inner diameter dimension of the central groove (13).

4. The production mold of the elastic pad according to claim 1, characterized in that: The upper convex block (8) is provided with a concave-convex texture structure of a molded elastic pad friction texture.

5. The production mold of the elastic pad according to claim 1, characterized in that: The central plane (9), the left plane (10) and the right plane (11) are coplanar with the plane where the inner surface of the cover plate (2) is located.

6. The production mold of the elastic pad according to claim 1, characterized in that: A mounting seat (17) extends outwardly from a side of the bottom plate (1) opposite to the hinged side, and a quick clamp (18) for fixing the cover plate (2) is provided on the mounting seat (17).

7. The production mold of the elastic pad according to claim 1, characterized in that: A plurality of mutually matching positioning protrusions (19) and positioning grooves (20) are arranged between the bottom plate (1) and the cover plate (2).

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