Automobile brake pad extrusion die capable of shortening tail shrinkage length

Abstract

The utility model discloses an automobile brake pad extrusion die capable of reducing the tail length, which comprises a guide plate, a die surface, a die cavity, a guide hole and a die surface, the guide hole is formed in the top of the guide plate and used for guiding aluminum flow to enter the die cavity, the die surface is mounted at the bottom of the guide plate, the die cavity communicated with the guide hole is formed in the die surface, and the die surface is used for hot extrusion forming of a brake pad. The hole wall of the flow guide hole is gradually shrunk inwards from top to bottom, a plane section is reserved on the hole wall of an inlet of the flow guide hole, and a cambered surface section is arranged on the hole wall of an outlet of the flow guide hole and used for maintaining stability of aluminum flow and reducing the tail shrinking length. Through the arrangement of the plane section and the cambered surface section, aluminum flow can stably flow into the cavity, and the hole wall gradually shrinks inwards from top to bottom, so that the aluminum flow cannot be accumulated at the outlet of the flow guide hole, the flow dead angle is reduced, and the aluminum flow in the cavity is uniformly distributed and is stable in flow speed at the moment; therefore, shrinkage at the tail end is avoided when the brake pad is formed, and the production quality of the brake pad is guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to an automobile brake pad extrusion die with a shortened tail length. Background Art

[0002] Automobile brake pads, also known as brake skins, are an important part of the vehicle braking system. In today's context where engine technology is increasingly difficult to improve and power battery efficiency is unsatisfactory, lightweight technology is a common basic technology for both traditional fuel vehicles and new energy vehicles. Due to the development of the new energy industry, demand is growing rapidly. At present, the extrusion process of brake pad products must be completed through extrusion dies;

[0003] like Figure 5 As shown, the inlet and outlet of the guide area of ​​the current brake pad extrusion die are usually rectangles with rounded corners, and the inlet is small and the outlet is large, so that when the aluminum flows through the guide area and is pressed into the cavity, the aluminum flow accumulates at the outlet, there is a flow dead corner, and the flow of the aluminum flow becomes unstable, resulting in the formation of a shrinkage tail at the tail end of the brake pad and a decrease in the yield rate.

[0004] Therefore, it is necessary to invent a kind of automobile brake pad extrusion die with shortened tail length to solve the above problems. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes an automobile brake pad extrusion die with shortened tail length. By setting the plane section and the arc section, the aluminum flow can flow smoothly into the cavity, and the hole wall gradually shrinks inward from top to bottom, so that the aluminum flow will not accumulate at the outlet of the guide hole, and the flow dead corner is reduced. At this time, the aluminum flow in the cavity is evenly distributed and the flow rate is stable, thereby avoiding the formation of a tail at the tail end when the brake pad is formed, thereby ensuring the production quality of the brake pad.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automobile brake pad extrusion die with a shortened tail length, comprising a guide plate, a guide hole is opened on the top of which, for guiding aluminum flow into the cavity;

[0009] A die surface is installed at the bottom of the guide plate, and has a cavity in the interior thereof which is connected with the guide hole and is used for hot extrusion molding of the brake pad;

[0010] The hole wall of the guide hole gradually shrinks inward from top to bottom, and a plane section is reserved on the hole wall at the entrance of the guide hole, and an arc section is arranged on the hole wall at the exit, so as to maintain the stability of the aluminum flow and reduce the length of the shrinkage tail.

[0011] Preferably, a first discharge hole communicating with the mold cavity is also provided inside the mold surface.

[0012] Preferably, the extrusion die further comprises a pad installed at the bottom of the die surface, and a second discharge hole communicating with the die cavity is provided inside the pad.

[0013] Preferably, the mold cavity is connected with the second discharge hole through the first discharge hole, the three are arranged as a whole in a stepped shape, and the hole wall at the entrance of the first discharge hole is chamfered.

[0014] Preferably, the top inlet of the guide hole is arranged in a rectangular shape, and the periphery of the hole wall is chamfered.

[0015] Preferably, the outlet of the guide hole is arranged in a plum blossom shape, and a horizontal section is reserved between the outlet and the cavity.

[0016] Preferably, the guide plate, the mold surface, and the backing plate are all configured to be disc-shaped, and all three are made of H13 mold steel.

[0017] Compared with the prior art, the above technical solution of the utility model has the following beneficial effects:

[0018] The utility model enables the aluminum flow to flow into the guide hole at a uniform speed through the plane section and the arc section in the guide hole, and guides the flow direction of the aluminum flow, so that the aluminum flow flows smoothly into the cavity, and the hole wall gradually shrinks inward from top to bottom, so that the aluminum flow will not accumulate at the outlet of the guide hole, effectively reducing the flow dead angle of the aluminum flow, and making the aluminum flow entering the cavity evenly distributed with a stable flow rate, thereby avoiding the formation of a shrinkage tail at the tail end when the brake pad is formed, ensuring the production quality of the brake pad and improving its yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a three-dimensional diagram of the utility model;

[0022] Figure 3 It is an exploded view of the utility model;

[0023] Figure 4 It is a cross-sectional view of the utility model;

[0024] Figure 5 It is a structural schematic diagram of an existing brake pad extrusion die.

[0025] Description of reference numerals:

[0026] 1 guide plate;

[0027] 2 guide holes, 21 plane segments, 22 arc segments;

[0028] 3 mold surface, 31 mold cavity, 32 first discharge hole;

[0029] 4 pad, 41 second discharge hole. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] The utility model provides Figure 1-4 The extrusion die of a brake pad with a shortened tail length is shown, comprising a guide plate 1, a guide hole 2 is provided on the top of the guide plate, and is used to guide the aluminum flow into the cavity 31;

[0032] The die surface 3 is installed at the bottom of the guide plate 1, and has a cavity 31 in the interior thereof which is connected with the guide hole 2 and is used for hot extrusion molding of the brake pad;

[0033] The hole wall of the guide hole 2 gradually shrinks inward from top to bottom, and a plane section 21 is reserved at the hole wall at the entrance of the guide hole 2, and a curved surface section 22 is provided at the hole wall at the exit, so as to maintain the stability of the aluminum flow and reduce the length of the shrinkage tail.

[0034] In one embodiment, a first discharge hole 32 connected to the cavity 31 is further opened inside the mold surface 3. The extrusion mold also includes a pad 4 installed at the bottom of the mold surface 3 to provide additional support and ensure the strength of the extrusion mold. A second discharge hole 41 connected to the cavity 31 is opened inside the pad 4. The cavity 31 is connected to the second discharge hole 41 through the first discharge hole 32. The three are arranged as a whole in a stepped shape, which is used for extruding the brake pad after molding and ensuring the integrity of its surface. The hole wall at the entrance of the first discharge hole 32 is chamfered, and the chamfering process is adopted to increase the strength of the mold surface 3.

[0035] In one embodiment, the top entrance of the guide hole 2 is set to be rectangular, and the periphery of the hole wall is chamfered, which helps the aluminum flow to flow and exhaust during the extrusion process. At the same time, the resistance when the aluminum flow enters the guide hole 2 makes the flow rate of the aluminum flow stable.

[0036] In one embodiment, the outlet of the guide hole 2 is set to be plum blossom-shaped, and a horizontal section is reserved between the guide hole 2 and the cavity 31, which can further guide the aluminum flow so that the aluminum flow is evenly distributed and the flow rate is stable.

[0037] In one embodiment, the guide plate 1, the die surface 3, and the backing plate 4 are all configured to be disc-shaped, and all three are made of H13 die steel, so that the extrusion die is suitable for hot extrusion production at high temperatures.

[0038] The specific implementation mode is as follows: when the utility model is in use, aluminum flows through the guide hole 2 into the cavity 31, and then is formed into a brake pad and extruded through the first discharge hole 32 and the second discharge hole 41, and the cavity 31, the first discharge hole 32 and the second discharge hole 41 are arranged as a whole in a stepped shape, which can ensure that the surface of the formed brake pad is not affected during extrusion, thereby ensuring the quality of the finished product;

[0039] Specifically, the plane section 21 at the inlet of the guide hole 2 can allow the aluminum flow to flow into the guide hole 2 at a uniform speed, and the arc section 22 at the outlet can guide the flow direction of the aluminum flow so that the aluminum flow can flow smoothly into the cavity 31;

[0040] Furthermore, since the hole wall of the guide hole 2 gradually shrinks inward from top to bottom, that is, the inlet of the guide hole 2 is large and the outlet is small, the aluminum flow will not accumulate at the outlet of the guide hole 2, effectively reducing the flow dead angle of the aluminum flow, so that the aluminum flow entering the cavity 31 is evenly distributed and the flow rate is stable, thereby avoiding the formation of a shrinkage tail at the rear end of the brake pad, ensuring the production quality of the brake pad during hot extrusion production, and improving its yield rate;

[0041] This embodiment specifically solves the problem that the inlet and outlet of the guide area of ​​the current brake pad extrusion die in the prior art are usually rectangular with rounded corners, and the inlet is small and the outlet is large, so that when the aluminum flows through the guide area and is pressed into the cavity 31, the aluminum flow accumulates at the outlet, there is a flow dead corner, and the flow of the aluminum flow becomes unstable, resulting in the formation of a shrinkage tail at the tail end of the brake pad and a decrease in the yield.

[0042] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automobile brake pad extrusion die with a shortened tail length, characterized in that: include: A guide plate (1) having a guide hole (2) on the top thereof for guiding the aluminum flow into the mold cavity (31); A mold surface (3) is installed at the bottom of the guide plate (1), and has a mold cavity (31) in its interior that is connected to the guide hole (2) and is used for hot extrusion molding of the brake pad; The hole wall of the guide hole (2) gradually shrinks inward from top to bottom, and a plane section (21) is reserved on the hole wall at the entrance of the guide hole (2), and a curved surface section (22) is provided on the hole wall at the exit, so as to maintain the stability of the aluminum flow and reduce the length of the shrinkage tail.

2. The automobile brake pad extrusion die with shortened tail length according to claim 1, characterized in that: The mold surface (3) is also provided with a first discharge hole (32) in communication with the mold cavity (31).

3. The automobile brake pad extrusion die with shortened tail length according to claim 2, characterized in that: The extrusion die also includes a backing plate (4) mounted on the bottom of the die surface (3), and a second discharge hole (41) communicating with the die cavity (31) is provided inside the backing plate (4).

4. The automobile brake pad extrusion die with shortened tail length according to claim 3, characterized in that: The mold cavity (31) is connected to the second discharge hole (41) via the first discharge hole (32), and the three are arranged in a stepped shape as a whole, and the hole wall at the entrance of the first discharge hole (32) is chamfered.

5. The automobile brake pad extrusion die with shortened tail length according to claim 1, characterized in that: The top inlet of the guide hole (2) is arranged in a rectangular shape, and the periphery of the hole wall is chamfered.

6. The automobile brake pad extrusion die with shortened tail length according to claim 1, characterized in that: The outlet of the guide hole (2) is arranged in a plum blossom shape, and a horizontal section is reserved between the outlet and the cavity (31).

7. The automobile brake pad extrusion die with shortened tail length according to claim 3, characterized in that: The guide plate (1), the die surface (3), and the backing plate (4) are all configured in a disc shape, and all three are made of H13 die steel.

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