A brake pad pre-press forming mechanism for preventing mold displacement and a press containing the same

Abstract

This utility model relates to the field of brake pad molding technology, and in particular to a brake pad pre-compression molding mechanism and a press containing the same for preventing mold displacement. The mechanism includes: a middle plate mold with several molding holes for containing liquid raw materials; a punch head located directly above the pre-compression molding station and installed at the bottom of the lower power seat for pre-compressing the raw materials in the molding holes of the middle plate mold; and an anti-displacement mechanism including a mechanical fork arm that slides horizontally relative to the power unit mounting base. The mechanical fork arm retracts to avoid rotation of the turntable and extends to vertically limit the middle plate mold, preventing displacement caused by the inertia of the punch head during retraction. This invention addresses the technical problems of low molding efficiency and easy displacement of the middle plate mold caused by the punch head lifting it after pre-compression molding, which are common in existing brake pad pre-compression molding mechanisms and presses.

Description

Technical Field

[0001] This utility model relates to the field of brake pad molding technology, and in particular to a brake pad pre-compression molding mechanism for preventing mold displacement and a press containing the same. Background Technology

[0002] Pre-forming presses are the first forming step in the brake pad production process. Their core purpose is to press the mixed brake pad raw materials at room temperature or low temperature into a mixture with a certain strength, specific shape, and weight before hot pressing. Although the pre-forming press is not the final hot pressing equipment, it is fundamental to ensuring the stability, consistency, and high efficiency of brake pad quality production. A good pre-forming process can significantly reduce the scrap rate in the hot pressing process, thereby improving the performance of the final product. Conventional pre-forming machines generally only have the single function of pre-forming, resulting in low overall efficiency in the brake pad pre-forming operation.

[0003] The prior art discloses a brake pad forming device, a new patent with publication number CN212372796U, which discloses a forming lower mold, a forming upper mold on the top of the forming lower mold, a mounting plate on the top of the forming upper mold, mounting holes on all four sides of the top of the mounting plate, mounting pins in the inner cavity of the mounting holes, and positioning grooves on all four sides of the top of the forming lower mold. The technologies mentioned above, including the aforementioned technical solutions, still have many problems, such as: the pre-pressing operation requires the addition of different raw materials, pre-pressing, and then demolding; the operation of traditional single-station presses, including those mentioned in the comparative documents, is sequential, with feeding, pressing, demolding, and resetting performed in order. When any action is performed, other stations are waiting, resulting in low production efficiency; feeding, pressing, and demolding functions need to be completed using different equipment, which occupies a large space; in some pre-pressing molds, if the perpendicularity between the punch head and the forming hole of the middle plate mold is inconsistent during the lifting process after the punch head has finished pressing, the punch head will frequently lift the middle plate mold, causing it to move away from the positioning point and resulting in equipment shutdown. Utility Model Content

[0004] The purpose of this utility model is to provide a brake pad pre-compression molding mechanism and a press containing the mechanism to prevent mold displacement, so as to solve the technical problems of low molding efficiency and easy displacement of the middle plate mold caused by the punch head after pre-compression molding in the prior art brake pad pre-compression molding mechanism and press.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A brake pad pre-compression molding mechanism for preventing mold displacement includes:

[0007] The medium plate mold has several forming holes for containing liquid raw materials, and its bottom can be detachably inserted into the pre-pressing station of the turntable.

[0008] The punch head is located directly above the pre-pressing station and installed at the bottom of the pressing power seat to pre-press the raw material in the forming hole of the middle plate mold. The pressing power seat is fixedly installed relative to the ground.

[0009] The anti-displacement mechanism includes a mechanical fork arm that is slidably mounted relative to the power unit mounting base in the horizontal direction. The power unit mounting base is fixedly mounted relative to the ground. The mechanical fork arm retracts to avoid the rotation of the turntable and extends to limit the middle plate mold in the vertical direction to prevent the middle plate mold from being displaced by inertia when the punch head rises.

[0010] Furthermore, the middle plate mold includes a mold body and mold side portions located on both sides of the mold body. The free end of the mechanical fork arm consists of two protruding pressure fork portions. When the two pressure fork portions extend into position, they are located directly above the mold side portions and in contact with their upper surface.

[0011] Furthermore, the upper surface of the side of the mold side is set as an inclined surface, and the inclination direction of the inclined surface increases with the distance from the mechanical fork arm. The bottom surface of the pressure fork of the pressure fork part is set as an inclined surface, and the inclination direction of the inclined surface decreases with the distance from the middle plate mold.

[0012] Furthermore, the slope of the upper surface of the side is the same as the slope of the bottom surface of the pressure fork of the pressure fork portion.

[0013] Furthermore, the bottom of the middle plate mold is provided with several positioning holes, which are inserted and installed in conjunction with positioning pins on the turntable.

[0014] Furthermore, the mechanical fork arm also includes a connecting part and a transition part. The connecting part is integrally connected to one end of the two pressure forks through the transition part. The distance between the two pressure forks is greater than the width of the connecting part. A side clearance surface is provided on the inner side of the end of the pressure fork part, and a bottom clearance surface is provided on the bottom surface of the end of the pressure fork part.

[0015] Furthermore, the bottom end of the connecting part of the mechanical fork arm away from the transition part is slidably mounted on a slide rail on the upper surface of the power unit mounting base. The power unit is also mounted on the power unit mounting base, and the power end of the power unit is fixedly mounted relative to the connecting part.

[0016] Furthermore, the width of the connecting part is L, the distance between the two pressure forks is H, the width of the two pressure forks is N, the length of the two pressure forks is K, the total length of the mechanical fork arm is M, and the thickness of the connecting part is S, wherein: H = (0.95~1.15)L, H = (7.5~8)N, M = (1.2~1.8)K, M = (1.4~1.8)L, N = S.

[0017] Furthermore, the slope of the bottom surface of the pressing fork is 1:β, 48<β<52.

[0018] A press, comprising the aforementioned brake pad pre-compression molding mechanism for preventing mold displacement, further comprising:

[0019] The turntable is mounted on its bottom and rotates relative to the ground via a rotating shaft, and is driven to rotate by its corresponding power mechanism;

[0020] The turntable has four operating positions, corresponding to the first feeding position, the second feeding position, the pre-pressing and forming position, and the cold block removal position. The first feeding position, the second feeding position, the pre-pressing and forming position, and the cold block removal position are arranged sequentially at 90° intervals along the turntable axis. The first feeding position and the second feeding position are used to add raw materials into the forming holes in the middle plate mold. The pre-pressing and forming position is used to pre-press and form the raw materials in the forming holes of the middle plate mold. The cold block removal position is used to remove the pre-pressed raw material blocks.

[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0022] (1). This utility model positions the middle plate mold of the pre-pressing forming station by setting an anti-displacement mechanism, while avoiding the rotation of the turntable, thus avoiding the phenomenon that the conventional middle plate mold is easily lifted by the punch head and caused to shift, thereby reducing the failure rate and ensuring production efficiency; through the structural design of the mold side of the middle plate mold and the inclined surface cooperation between it and the mechanical fork arm of the anti-displacement mechanism, the middle plate mold is fully limited, avoiding the noise caused by the middle plate mold being lifted by the punch head; by setting the size limitation relationship between the pressure fork part, transition part and connecting part of the mechanical fork arm, it is beneficial to decompose the pressure of the middle plate mold into two components, reduce the single-point stress, and at the same time take into account the strength and bending stiffness of the mechanical fork arm;

[0023] (2). This utility model adopts a press with an anti-displacement mechanism, which integrates feeding, pre-pressing and demolding functions into one machine. It eliminates the serial process of traditional presses. Through the rotation of the turntable, four processes can be operated at the same time. When one process is pressing, other processes are feeding or demolding, which greatly speeds up the production cycle and shortens the cycle time. At the same time, the pre-pressing station is fixed and independent. Its pressure system is not affected by feeding and demolding actions, thus ensuring product consistency. In addition, the functions of feeding, pressing and demolding are integrated into one rotating platform, which greatly saves the space occupied by the equipment. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the press of this utility model;

[0025] Figure 2 This is a schematic diagram of the main structure of the press of this utility model;

[0026] Figure 3 This is a three-dimensional structural schematic diagram of the plate mold of this utility model from a top view.

[0027] Figure 4 This is a three-dimensional structural diagram of the plate mold of this utility model from a bottom-view perspective;

[0028] Figure 5 This is a top view of the mechanical fork arm of this utility model.

[0029] Figure 6 This is a schematic diagram of the main structure of the mechanical fork arm of this utility model.

[0030] In the diagram: 100, turntable; 101, first loading station; 102, second loading station; 103, pre-pressing station; 104, cold block removal station; 105, rotating shaft; 200, middle plate mold; 201, mold body; 202, mold side; 203, upper side surface; 204, forming hole; 205, positioning hole; 300, punch head; 400, mechanical fork arm; 401, connecting part; 402, transition part; 403, pressure fork part; 404, side clearance surface; 405, inner transition surface; 406, bottom clearance surface; 407, pressure fork bottom surface; 500, slide rail; 600, power unit mounting base; 700, support; 800, lower pressure power base. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0038] This utility model primarily addresses the problems of low production efficiency and high failure rate commonly found in existing brake pad preforming presses. Conventional brake pad preforming equipment has limited functionality, with each process, such as feeding, preforming, and demolding, being a sequential operation, which restricts production efficiency. Furthermore, the punch head 300 is prone to lifting the middle plate mold 200 during retraction, causing malfunctions and downtime. The technical solution of this application is as follows:

[0039] Example 1

[0040] A brake pad pre-compression molding mechanism for preventing mold displacement includes three main parts: a middle plate mold 200, a punch head 300, and an anti-displacement mechanism. The punch head 300 and the anti-displacement mechanism are both installed at the pre-compression molding station 103 and do not rotate synchronously with the turntable 100. The structure of each part is described in detail below.

[0041] See appendix Figure 2 and 4 The medium plate mold 200 has several forming holes 204 for receiving liquid raw materials, and its bottom is detachably inserted into the pre-pressing forming station 103 of the turntable 100. Specifically, the bottom of the medium plate mold 200 is provided with several positioning holes 205, which are inserted into the turntable 100 in cooperation with positioning pins. It should be noted that the medium plate mold 200 is not vertically positioned because it needs to be moved during demolding. Therefore, if the turntable 100 is to be used to automate each process, positioning the medium plate mold 200 with positioning pins is the optimal choice. The medium plate mold 200 includes a mold body 201 and mold side portions 202 located on both sides of the mold body 201. The height of the mold side portions 202 is significantly lower than the height of the mold body 201. The forming holes 204 are formed by the downward indentation of the upper surface of the mold body 201. The number of forming holes 204 can be set according to requirements.

[0042] The punch head 300 is located directly above the pre-pressing station 103 and installed at the bottom of the pressing power base 800 to pre-press the raw material in the forming hole 204 of the middle plate mold 200. The pressing power base 800 is fixedly installed relative to the ground. It can be understood that the pressing power base 800 can be a column or other support base. The pressing power unit is installed on the pressing power base 800, and the punch head 300 is installed on the power end of the pressing power unit. The pressing power unit can generally be a hydraulic cylinder or other power equipment that moves in the vertical direction.

[0043] See appendix Figure 1-2 and attached Figure 5-6The anti-displacement mechanism includes a mechanical fork arm 400, which is slidably mounted horizontally relative to a power unit mounting base 600. The power unit mounting base 600 is fixedly mounted relative to the ground. It can be understood that the power unit mounting base 600 is mounted on a support 700, which can be a platform set on the ground. The reciprocating motion of the mechanical fork arm 400 is driven by a power unit mounted on the power unit mounting base 600. The power unit can be a cylinder or other linear drive components. The mechanical fork arm 400 retracts to avoid the rotation of the turntable 100, and extends to limit the vertical movement of the middle plate mold 200 to prevent the middle plate mold 200 from being displaced by inertia when the punch head 300 rises. Specifically, the mechanical fork arm 400 is configured as a Y-shaped structure. More specifically, the two free ends of the Y-shape are U-shaped structures, and the two free ends are two protruding pressure fork portions 403. When the two pressure fork portions 403 are extended into place, they are located directly above the mold side portion 202 and in contact with its upper surface. The upper side surface 203 of the mold side portion 202 is set as an inclined surface, and the inclination direction of the inclined surface increases with the distance from the mechanical fork arm 400. The bottom surface 407 of the pressure fork portion 403 is set as an inclined surface, and the inclination direction of the inclined surface decreases with the distance from the middle plate mold. The slope of the upper side surface 203 is the same as the slope of the bottom surface 407 of the pressure fork portion 403. Specifically, when the pressure fork portion 403 moves closer to the middle plate mold 200, the bottom surface of the pressure fork portion 403 and the upper side surface 203 of the mold side portion 202 are parallel and get closer and closer. When the pressure fork portion 403 extends into place, it contacts and presses against the mold side portion 202. The mechanical fork arm 400 also includes a connecting part 401 and a transition part 402. At the junction of the pressure fork part 403 and the transition part 402, the outer side is set as a slope, and the inner side is set as an inner transition surface 405. The inner transition surface 405 is set as a rounded corner to maximize stress dispersion and minimize the stress concentration factor. The connecting part 401 is integrally connected to one end of the two pressure fork parts 403 through the transition part 402. The distance between the two pressure fork parts 403 is greater than the width of the connecting part 401. The inner side of the end of the pressure fork part 403 is provided with a side clearance surface 404, and the bottom surface of the end of the pressure fork part 403 is provided with a bottom clearance surface 406. As can be seen from the attached drawings, both the side clearance surface 404 and the bottom clearance surface 406 are set as slopes to ensure that the pressure fork part 403 is safer when it approaches the middle plate mold 200 and to prevent side scraping caused by processing errors.The bottom end of the connecting part 401 of the mechanical fork arm 400 away from the transition part 402 is slidably mounted on the slide rail 500 on the upper surface of the power unit mounting base 600. The slide rail 500 is configured as a T-shaped structure. The power unit is also mounted on the power unit mounting base 600. The power end of the power unit is fixedly mounted relative to the connecting part 401. Although it is not shown in the attached figure, the installation position of the power unit and how it works can be clearly understood through the above text description. It will not be elaborated further here. The width of the connecting part 401 is L, the distance between the two pressing fork parts 403 is H, the width of each of the two pressing fork parts 403 is N, the length of each of the two pressing fork parts 403 is K, the total length of the mechanical fork arm 400 is M, and the thickness of the connecting part 401 is S, wherein: H = (0.95~1.15)L, H = (7.5~8)N, M = (1.2~1.8)K, M = (1.4~1.8)L, N = S, and the slope of the pressing fork bottom surface 407 of the pressing fork part 403 is... With a ratio of 1:β, 48<β<52, by setting the dimensional limitation relationship between the pressing fork part 403 of the mechanical fork arm 400, the transition part 402, and the connecting part 401, it is beneficial to decompose the pressure of the middle plate mold 200 into two component forces, reduce single-point stress, and at the same time take into account the strength and bending stiffness of the mechanical fork arm 400. More specifically, by limiting the size and proportional relationship of each part, stress concentration is significantly reduced, fatigue failure is avoided, torsional stiffness and stability are improved, and bending efficiency is improved.

[0044] Example 2

[0045] See appendix Figure 1 and 2 A press includes a brake pad pre-compression forming mechanism for preventing mold displacement as described above, and further includes: a turntable 100, the bottom of which is rotatably mounted relative to the ground via a rotating shaft 105, and driven to rotate by a corresponding power mechanism. The rotation of the turntable 100 is conventional and will not be elaborated further. The turntable 100 has four operating positions, corresponding to a first loading position 101, a second loading position 102, a pre-compression forming position 103, and a cold-formed block removal position 104. It should be understood that the first loading position 101, the second loading position 102, the pre-compression forming position 103, and the cold-formed block removal position 104 are all fixed positions relative to the ground; that is, the position of each position is constant. The turntable mold 200 is positioned at whichever position it rotates to. Figure 1The diagram shows the positions of the four processes when the turntable 100 rotates to a certain position. The first loading station 101, the second loading station 102, the pre-pressing and forming station 103, and the cold block removal station 104 are arranged sequentially at 90° intervals along the axis of the turntable 100. The first loading station 101 and the second loading station 102 are used to add raw materials into the forming holes 204 in the middle plate mold 200. The pre-pressing and forming station 103 is used to pre-press and form the raw materials in the forming holes 204 of the middle plate mold 200. The cold block removal station 104 is used to remove the pre-pressed raw material blocks.

[0046] When using the press of this utility model for brake pad pre-pressing, the first feeding station, the second feeding station, the pre-pressing station, and the cold block removal station can be carried out simultaneously. The first feeding station and the second feeding station are used to add brake pad raw materials. After each process is completed, the turntable rotates 90°. When the middle plate mold rotates to the pre-pressing station, the mechanical fork arm extends, the pressure fork part presses the middle plate mold, the punch head is pre-pressed and then rises, and then the mechanical fork arm retracts, and the turntable continues to rotate to the next station.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake pad pre-compression molding mechanism for preventing mold displacement, characterized in that, include: The medium plate mold (200) has several forming holes (204) for containing liquid raw materials, and its bottom can be detachably inserted into the pre-pressing station (103) of the turntable (100). The punch head (300) is located directly above the pre-pressing station (103) and installed at the bottom of the pressing power seat (800) to pre-press the raw material in the forming hole (204) of the middle plate mold (200). The pressing power seat (800) is fixedly installed relative to the ground. The anti-displacement mechanism includes a mechanical fork arm (400) which is slidably mounted relative to a power unit mounting base (600) in the horizontal direction. The power unit mounting base (600) is fixedly mounted relative to the ground. The mechanical fork arm (400) retracts to avoid rotation of the turntable (100) and extends to limit the middle plate mold (200) in the vertical direction to prevent the middle plate mold (200) from being displaced by inertia when the punch head (300) rises.

2. The brake pad pre-compression molding mechanism for preventing mold displacement according to claim 1, characterized in that, The middle plate mold (200) includes a mold body (201) and mold side parts (202) located on both sides of the mold body (201). The free end of the mechanical fork arm (400) is two protruding pressure fork parts (403). When the two pressure fork parts (403) are extended into place, they are located directly above the mold side parts (202) and in contact with its upper surface.

3. The brake pad pre-compression molding mechanism for preventing mold displacement according to claim 2, characterized in that, The upper side surface (203) of the mold side part (202) is set as an inclined surface, and the inclination direction of the inclined surface is increasingly higher as it moves away from the mechanical fork arm (400). The bottom surface (407) of the pressure fork part (403) is set as an inclined surface, and the inclination direction of the inclined surface is increasingly lower as it moves away from the middle plate mold.

4. The brake pad pre-compression molding mechanism for preventing mold displacement according to claim 3, characterized in that, The slope of the upper surface (203) of the side is the same as the slope of the bottom surface (407) of the pressure fork part (403).

5. A brake pad pre-compression molding mechanism for preventing mold displacement according to claim 4, characterized in that, The bottom of the middle plate mold (200) is provided with several positioning holes (205), which are inserted and installed in cooperation with the positioning pins on the turntable (100).

6. A brake pad pre-compression molding mechanism for preventing mold displacement according to claim 5, characterized in that, The mechanical fork arm (400) further includes a connecting part (401) and a transition part (402). The connecting part (401) is integrally connected to one end of the two pressing fork parts (403) through the transition part (402). The distance between the two pressing fork parts (403) is greater than the width of the connecting part (401). A side clearance surface (404) is provided on the inner side of the end of the pressing fork part (403), and a bottom clearance surface (406) is provided on the bottom surface of the end of the pressing fork part (403).

7. A brake pad pre-compression molding mechanism for preventing mold displacement according to claim 6, characterized in that, The bottom end of the connecting part (401) of the mechanical fork arm (400) away from the transition part (402) is slidably mounted on the slide rail (500) on the upper surface of the power unit mounting base (600). The power unit is also mounted on the power unit mounting base (600), and the power end of the power unit is fixedly mounted relative to the connecting part (401).

8. A brake pad pre-compression molding mechanism for preventing mold displacement according to claim 7, characterized in that, The width of the connecting part (401) is L, the distance between the two pressure fork parts (403) is H, the width of the two pressure fork parts (403) is N, the length of the two pressure fork parts (403) is K, the total length of the mechanical fork arm (400) is M, and the thickness of the connecting part (401) is S, wherein: H=(0.95~1.15)L, H=(7.5~8)N, M=(1.2~1.8)K, M=(1.4~1.8)L, N=S.

9. A brake pad pre-compression molding mechanism for preventing mold displacement according to claim 8, characterized in that, The slope of the bottom surface (407) of the pressing fork part (403) is 1:β, 48<β<52.

10. A press comprising a brake pad pre-compression molding mechanism for preventing mold displacement as described in any one of claims 1-9, characterized in that, Also includes: A turntable (100) is mounted on its bottom relative to the ground via a rotating shaft (105) and is driven to rotate by its corresponding power mechanism; The turntable (100) has four operating material positions, corresponding to the first feeding station (101), the second feeding station (102), the pre-pressing station (103), and the cold block removal station (104), respectively. The first feeding station (101), the second feeding station (102), the pre-pressing station (103), and the cold block removal station (104) are arranged sequentially at 90° intervals along the axis of the turntable (100). The first feeding station (101) and the second feeding station (102) are used to add raw materials into the forming holes (204) in the middle plate mold (200). The pre-pressing station (103) is used to pre-press the raw materials in the forming holes (204) of the middle plate mold (200). The cold block removal station (104) is used to remove the pre-pressed raw material blocks.

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