Injection mold for brake pedal combined part

Abstract

The utility model relates to a brake pedal combined part injection mold which comprises a fixed mold fixing plate, a fixed mold plate, a movable mold plate, cushion blocks and a movable mold fixing plate which are arranged from top to bottom, the cushion blocks are fixedly connected to the four corners of the top of the movable mold fixing plate, the movable mold plate is fixedly connected to the tops of the cushion blocks, the fixed mold plate is arranged right above the movable mold plate, and the movable mold plate is arranged right above the fixed mold plate. The top of the fixed mold plate is fixedly connected with a fixed mold fixing plate, a profiled groove is formed in the top of the movable mold plate, and the bottom of the fixed mold plate protrudes to form a mold core part used for being inserted into the profiled groove. The utility model relates to the technical field of injection molds. According to the injection mold for the brake pedal combined part, through the arranged demolding assembly, automatic demolding in the demolding procedure after molding of the brake pedal combined part is completed can be achieved, the injection mold does not need to be additionally assembled with a power assembly used for pushing the top plate to move, and therefore the use cost of the injection mold is reduced; the practicability of the injection mold is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a brake pedal assembly part. Background Art

[0002] As the name implies, the brake pedal is a pedal that restricts power, that is, the pedal of the foot brake (service brake). The brake pedal is used to decelerate and stop the vehicle. It is one of the five major operating components of an automobile. It is used very frequently. How the driver controls it directly affects driving safety.

[0003] According to the injection mold for a brake pedal assembly part disclosed in Chinese Patent Publication No. CN216941639U, the utility model discloses an injection mold for a brake pedal assembly part, which relates to the technical field of injection molds. From top to bottom, there are a fixed mold fixing plate, a fixed mold plate, a moving mold plate, a spacer block and a moving mold fixing plate. Guide pillars and guide sleeves are arranged around. The injection-molded parts are a pedal and a connecting piece. There are three side demolding structures. An upper template and a lower template are respectively fixedly installed between the fixed mold plate and the moving mold plate. A thimble fixing plate and a top plate are arranged below the moving mold plate. Thimbles are fixedly installed at the upper end of the thimble fixing plate; the utility model designs an injection mold for the combined parts of the brake pedal. Three side demolding structures are required to achieve smooth demolding during demolding. Technicians designed two parts of structural components on the mold to achieve demolding. The stroke is short, the demolding effect is good, two sets of combined parts can be realized in one injection, and they are arranged axially symmetrically for mass production, and the efficiency is relatively high. There is a heat preservation structure inside the mold, which further improves the injection quality.

[0004] According to the above patent, when demolding finally, a machine is used to push the top plate so that the thimble pushes out the injection-molded parts, resulting in that a separate power component for pushing the top plate to move needs to be set during the use of the injection mold, increasing the installation difficulty and operation steps of the injection mold, thereby increasing the use cost of the injection mold. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an injection mold for a brake pedal assembly part, so as to solve the technical problems mentioned in the above background art.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] The injection mold for the brake pedal assembly part includes a fixed mold fixing plate, a fixed mold plate, a moving mold plate, a spacer block, and a moving mold fixing plate arranged from top to bottom. At the four corners of the top of the moving mold fixing plate, spacer blocks are fixedly connected. At the top of the spacer blocks, a moving mold plate is fixedly connected. A fixed mold plate is arranged directly above the moving mold plate. At the top of the fixed mold plate, a fixed mold fixing plate is fixedly connected. A mold cavity is formed at the top of the moving mold plate, and a core part for inserting into the mold cavity is formed by a protrusion at the bottom of the fixed mold plate. A demolding assembly is arranged between the moving mold plate and the moving mold fixing plate.

[0008] Further, the demolding assembly includes a top plate, a return spring, a thimble part, and a positioning post. Spring grooves are formed at the four corners of the bottom of the top plate, and a return spring is arranged between the top plate and the moving mold fixing plate. Positioning posts are fixedly connected to the four corners of the top of the top plate. The top of the positioning post penetrates through the moving mold plate and extends upward. A thimble part for demolding is arranged at the top of the top plate.

[0009] Further, the thimble part includes a thimble, a thimble rod, and a tension spring. The bottom of the thimble rod is fixedly connected to the top plate. A plug rod part is formed by a protrusion at the top of the thimble rod. A thimble is slidably sleeved on the outer side wall of the plug rod part. A tension spring is arranged between the thimble and the plug rod part.

[0010] Further, a slot communicating with the mold cavity is formed at the bottom of the moving mold plate, and a thimble is slidably sleeved in the slot.

[0011] Further, a limiting part is formed by a protrusion at the top of the thimble, and an avoidance groove for placing the limiting part is formed at the top of the slot.

[0012] Further, the length of the thimble is the same as the length of the slot;

[0013] When the positioning post is squeezed by the fixed mold plate until the end is flush with the top of the moving mold plate, the bottom of the top plate contacts the moving mold fixing plate, and the thimble is separated from the thimble rod.

[0014] Further, the volume of the core part is smaller than the volume of the mold cavity, so that when the moving mold plate and the fixed mold plate are fitted together, the core part and the mold cavity cooperate to form a cavity for shaping.

[0015] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0016] 1. For the injection mold for the brake pedal assembly part, through the arranged demolding assembly, automatic demolding can be realized in the demolding process after the shaping of the brake pedal assembly part, so that there is no need to assemble an additional power assembly for pushing the top plate to move during the use of the injection mold, thereby reducing the use cost of the injection mold and improving the practicability of the injection mold;

[0017] 2. The injection mold for the brake pedal assembly can delay the demolding process of the brake pedal assembly through the set ejector pin component, avoiding the part being squeezed and damaged by the interference of the side demolding structure when the ejector pin component jacks up the part for demolding, which can further improve the practicability of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the injection mold for the brake pedal assembly of the present invention.

[0020] Figure 2 It is a schematic structural diagram of the initial state of the injection mold for the brake pedal assembly of the present invention.

[0021] Figure 3 It is a schematic internal structural diagram of the injection mold for the brake pedal assembly of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the spring groove in the injection mold for the brake pedal assembly of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the ejector pin component in the injection mold for the brake pedal assembly of the present invention.

[0024] In the figure, 1, fixed mold fixing plate; 2, fixed template; 3, moving template; 4, spacer block; 5, moving mold fixing plate; 6, mold cavity; 7, core part; 8, demolding assembly; 81, top plate; 82, return spring; 83, ejector pin component; 831, ejector pin; 832, ejector rod; 833, tension spring; 84, positioning column; 9, spring groove; 10, inserting rod part; 11, inserting slot; 12, limiting part; 13, avoiding groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will further describe the present invention in detail with reference to the drawings.

[0026] Embodiment:

[0027] Refer to Figure 1 - Figure 5, the injection mold for the brake pedal assembly parts disclosed by the present utility model includes a fixed mold fixing plate 1, a fixed mold plate 2, a moving mold plate 3, a spacer block 4, and a moving mold fixing plate 5 arranged from top to bottom. Four corners of the top of the moving mold fixing plate 5 are fixedly connected with spacer blocks 4. The top of the spacer blocks 4 is fixedly connected with the moving mold plate 3. A fixed mold plate 2 is arranged directly above the moving mold plate 3. The top of the fixed mold plate 2 is fixedly connected with the fixed mold fixing plate 1. A mold cavity 6 is formed at the top of the moving mold plate 3. A core part 7 for inserting into the mold cavity 6 is formed by a protrusion at the bottom of the fixed mold plate 2. A demolding assembly 8 is arranged between the moving mold plate 3 and the moving mold fixing plate 5.

[0028] In this embodiment, the initial state of the mold is as Figure 2 shown. When using the mold, the moving mold fixing plate 5 is pushed close to the fixed mold fixing plate 1 by a machine, and then the moving mold plate 3 is made to fit with the fixed mold plate 2, so as to form a cavity for injection molding between the moving mold plate 3 and the fixed mold plate 2.

[0029] After the brake pedal assembly is formed, the moving mold fixing plate 5 moves driven by the machine, separating the moving mold plate 3 from the fixed mold plate 2. Subsequently, the side demolding structure starts to demold. During the demolding process of the side demolding structure, the arranged demolding assembly 8 will gradually apply pressure to the injection molded part as the demolding time increases. Until the side demolding structure is completely separated from the part, the demolding assembly 8 will also eject the part, enabling the part to be completely demolded.

[0030] The automatic demolding of the part is realized by using the demolding assembly 8, eliminating the need for setting additional power components, effectively reducing the installation difficulty of the mold, reducing the use cost of the mold, and making the injection mold for the brake pedal assembly parts more practical.

[0031] Among them, the above-mentioned side demolding structure is the same as the first side demolding structure, the second side demolding structure, and the third side demolding structure in the Chinese patent publication number CN216941639U. Since it is not within the scope of improvement of this application, it will not be elaborated too much.

[0032] In a further preferred embodiment of the present utility model, as Figure 2 shown, the demolding assembly 8 includes a top plate 81, a return spring 82, a thimble part 83, and a positioning column 84. Spring grooves 9 are formed at the four corners of the bottom of the top plate 81, and a return spring 82 is arranged between the top plate 81 and the moving mold fixing plate 5. Four corners of the top of the top plate 81 are fixedly connected with positioning columns 84. The top of the positioning columns 84 penetrates through the moving mold plate 3 and extends upward. A thimble part 83 for demolding is arranged at the top of the top plate 81.

[0033] In this embodiment, by providing the top plate 81, the floating of the top plate 81 can be utilized to drive the movement of the ejector pin member 83, so that the ejector pin member 83 ejects the injection molded part out of the mold cavity 6 during the demolding process, completing the complete demolding of the part.

[0034] And by providing spring grooves 9 at the four corners of the bottom of the top plate 81, and connecting the spring grooves 9 and the moving mold fixing plate 5 through return springs 82, the top plate 81 will automatically reset when not being extruded, so that during the demolding process of the mold, the top plate 81 resets and drives the ejector pin member 83 to eject the part out of the mold cavity.

[0035] In a further preferred embodiment of the present utility model, as Figure 3 and Figure 5 shown, the ejector pin member 83 includes an ejector pin 831, a push rod 832 and a tension spring 833. The bottom of the push rod 832 is fixedly connected to the top plate 81. A plug rod portion 10 is formed by a protrusion at the top of the push rod 832. The ejector pin 831 is slidably sleeved on the outer side wall of the plug rod portion 10, and a tension spring 833 is provided between the ejector pin 831 and the plug rod portion 10.

[0036] In this embodiment, since the brake pedal combination part has a complex curved surface, after the brake pedal combination part is injection molded, it is necessary to first demold the side demolding structure. After the side demolding structure is completely demolded, the ejector pin member 83 ejects the part, so that the part will not be squeezed and damaged due to the interference of the side demolding structure. Therefore, during the demolding process of the injection molded part, the ejector pin member 83 needs to be delayed in demolding.

[0037] Therefore, by observing Figure 3 and Figure 5 it can be found that the push rod 832 and the ejector pin 831 are separately provided. At the same time, the top of the push rod 832 is connected to the ejector pin 831 through the plug rod portion 10, and a tension spring 833 is also provided between the plug rod portion 10 and the ejector pin 831. When the top plate 81 moves downward and drives the push rod 832 to separate from the ejector pin 831, the plug rod portion 10 stretches the tension spring 833, so that the tension spring 833 exerts a pulling force on the ejector pin 831, causing the ejector pin 831 to retract into the moving template 3, avoiding the ejector pin 831 protruding from the mold cavity 6 and affecting the shaping of the brake pedal combination part; and when the brake pedal combination part needs to be demolded after shaping, since there is a gap between the push rod 832 and the ejector pin 831, the reset of the top plate 81 will not cause the push rod 832 to push the ejector pin 831 to move upward. Instead, when the push rod 832 moves upward to contact the ejector pin 831, as the push rod 832 continues to move upward, it will push the ejector pin 831 to move upward, causing the ejector pin to eject the injection molded part out of the mold cavity 6, achieving the effect of delayed demolding.

[0038] In a further preferred embodiment of the present utility model, as Figure 3As shown, a slot 11 communicating with the mold cavity 6 is formed at the bottom of the moving template 3, and a ejector pin 831 is slidably sleeved in the slot 11.

[0039] In this embodiment, by forming a slot 11 communicating with the mold cavity 6 at the bottom of the moving template 3, it can be used to place the ejector pin 831, so that when the ejector pin 831 moves upward, the injection molded part in the mold cavity 6 can be lifted, and the brake pedal assembly can be completely demolded, which can improve the demolding efficiency of the brake pedal assembly.

[0040] In a further preferred embodiment of the present utility model, as Figure 3 shown, a limiting portion 12 is formed by protruding at the top of the ejector pin 831, and an avoidance groove 13 for placing the limiting portion 12 is formed at the top of the slot 11.

[0041] In this embodiment, since a tension spring 833 is provided between the ejector pin 831 and the ejector rod 832, when the ejector rod 832 moves downward, the ejector pin 831 will be pulled downward by the tension spring 833, so that the ejector pin 831 moves downward along the slot 11, causing a circular groove to be formed at the bottom of the mold cavity 6, resulting in the injection molded plastic flowing into the circular groove and affecting the shaping of the brake pedal assembly.

[0042] Therefore, it can be observed that Figure 3 by providing a limiting portion 12 at the top of the ejector pin 831 and forming an avoidance groove 13 for placing the limiting portion 12 at the top of the slot 11, when the ejector pin 831 is pulled by the tension spring 833, the limiting portion 12 of the ejector pin 831 will be supported by the avoidance groove 13, and the downward movement of the ejector pin 831 can be prevented through the support of the avoidance groove 13, so that the top of the ejector pin 831 is flush with the inner bottom wall of the mold cavity 6, thereby making the outer wall of the shaped brake pedal assembly smoother and improving the quality of the brake pedal assembly.

[0043] In a further preferred embodiment of the present utility model, as Figure 3 and Figure 4 shown, the length of the ejector pin 831 is the same as the length of the slot 11;

[0044] When the positioning post 84 is pressed by the fixed template 2 until its end is flush with the top of the moving template 3, the bottom of the top plate 81 contacts the moving mold fixing plate 5, and the ejector pin 831 is separated from the ejector rod 832.

[0045] In this embodiment, by making the length of the ejector pin 831 the same as the length of the slot 11, when the top plate 81 moves downward, the ejector pin 831 is separated from the ejector rod 832, so that when the top plate 81 moves upward and resets, the ejector rod 832 will not directly drive the ejector pin 831 to move upward, thus achieving the effect of delayed demolding of the ejector pin 831.

[0046] When the positioning post 84 is pressed by the fixed template 2 until the end is flush with the top of the moving template 3, the bottom of the top plate 81 contacts the moving die fixing plate 5, so that when the mold is closed, the ejector pin 831 can be retracted into the slot 11, and the limiting portion 12 enters the avoidance groove 13, keeping the inner bottom wall of the mold cavity 6 flat, which is used for better injection molding of the brake pedal assembly.

[0047] In a further preferred embodiment of the present invention, as Figure 3 shown, the volume of the core portion 7 is smaller than the volume of the mold cavity 6, so that when the moving template 3 is attached to the fixed template 2, the core portion 7 and the mold cavity 6 cooperate to form a cavity for shaping.

[0048] In this embodiment, by making the volume of the core portion 7 smaller than the volume of the mold cavity 6, when the moving template 3 is attached to the fixed template 2, a gap can be generated between the core portion 7 and the mold cavity 6, thereby forming a cavity for shaping the brake pedal assembly, and the plastic injected into the gap fills the gap and then cools and shapes to form the brake pedal assembly.

[0049] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. Injection mold for brake pedal combination components, including a fixed mold fixing plate (1), a fixed mold plate (2), a movable mold plate (3), a spacer block (4), and a movable mold fixing plate (5) arranged from top to bottom. At the four corners of the top of the movable mold fixing plate (5), spacer blocks (4) are fixedly connected. The top of the spacer blocks (4) is fixedly connected with the movable mold plate (3). A fixed mold plate (2) is arranged directly above the movable mold plate (3). The top of the fixed mold plate (2) is fixedly connected with the fixed mold fixing plate (1), characterized in that, A mold cavity (6) is formed at the top of the moving template (3), and a core portion (7) for inserting into the mold cavity (6) is formed by protruding at the bottom of the fixed template (2). A demolding assembly (8) is arranged between the moving template (3) and the moving mold fixing plate (5); The demolding assembly (8) includes a top plate (81), a return spring (82), a ejector pin member (83) and a positioning post (84). Spring grooves (9) are formed at the four corners of the bottom of the top plate (81), and a return spring (82) is arranged between the top plate (81) and the moving mold fixing plate (5). Positioning posts (84) are fixedly connected to the four corners of the top of the top plate (81). The top of the positioning post (84) penetrates through the moving template (3) and extends upward. An ejector pin member (83) for demolding is arranged on the top of the top plate (81); The ejector pin member (83) includes an ejector pin (831), an ejector rod (832) and a tension spring (833). The bottom of the ejector rod (832) is fixedly connected to the top plate (81). A plug rod portion (10) is formed by protruding at the top of the ejector rod (832). The ejector pin (831) is slidably sleeved on the outer side wall of the plug rod portion (10). A tension spring (833) is arranged between the ejector pin (831) and the plug rod portion (10).

2. The injection mold for the brake pedal assembly component according to claim 1, characterized in that, A slot (11) communicating with the mold cavity (6) is formed at the bottom of the moving template (3). The ejector pin (831) is slidably sleeved in the slot (11).

3. The injection mold for the brake pedal assembly component according to claim 2, wherein, A limiting portion (12) is formed by protruding at the top of the ejector pin (831). An avoidance groove (13) for placing the limiting portion (12) is formed at the top of the slot (11).

4. The injection mold for the brake pedal assembly component according to claim 3, characterized in that, The length of the ejector pin (831) is the same as the length of the slot (11); When the positioning post (84) is squeezed by the fixed template (2) until the end is flush with the top of the moving template (3), the bottom of the top plate (81) contacts the moving mold fixing plate (5), and the ejector pin (831) is separated from the ejector rod (832).

5. The injection mold for the brake pedal combination component according to claim 1, characterized in that, The volume of the core portion (7) is smaller than the volume of the mold cavity (6). When the moving template (3) is attached to the fixed template (2), the core portion (7) and the mold cavity (6) cooperate to form a cavity for shaping.

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