An improved rubber bushing edgeless mold

Abstract

The present invention discloses an improved rubber bushing borderless mold, wherein the top of the lower mold core is provided with the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position, the first lower mounting position is provided with a first lower sealing rib arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib arranged in an annular manner around the first lower sealing rib. Through the above-mentioned improved rubber bushing borderless mold with optimized design, sealing ribs are provided at the positions where the upper and lower mold cores cooperate with the skeleton, and after the mold is closed, the template cooperates with the skeleton through the sealing ribs to prevent rubber from overflowing from the edge of the skeleton, thereby improving the injection molding quality and reducing the generation of flash.

Description

Technical Field

[0001] The invention relates to the technical field of rubber bushing processing, in particular to an improved rubber bushing borderless mold. Background Art

[0002] The rubber bushing product has rubber between the inner and outer frames, and the frame material is usually 20 steel. Before the improvement, the mold had no sealing structure, no vacuum structure, and a total of 4 partings, resulting in 4 flash edges, which required manual tearing of the flash edges and machine sanding. The existing front rubber bushing mold has the following problems:

[0003] 1. The bushing mold has no sealing structure and adopts the tearing and sanding process design. There are 4 flash edges, and the subsequent process requires manual tearing, which has low production efficiency;

[0004] 2. The bushing mold has no vacuum structure. In order to exhaust the air in the cavity, the vulcanization equipment opens the mold 1-2mm after the rubber injection is completed, and uses the opened gap to exhaust. When the mold is opened with a gap, the rubber under high pressure in the cavity will overflow from the analysis gap, causing the thickness and area of ​​the flash to increase, increasing the difficulty of tearing the edge and wasting rubber. The manual tearing process has low efficiency, high cost and unstable product quality. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention provides an improved rubber bushing edgeless mold.

[0006] The improved rubber bushing edgeless mold proposed by the present invention comprises: an upper mold plate, a middle mold plate, a lower mold plate, an upper mold core, and a lower mold core;

[0007] The upper template, the middle template, and the lower template are stacked in sequence, the upper template is provided with a first installation opening, the middle template is provided with a second installation opening, and the lower template is provided with a third installation opening, the first installation opening, the second installation opening, and the third installation opening are connected in sequence, the upper mold core is installed in the first installation opening, the lower mold core is installed in the third installation opening, and the upper mold core, the lower mold core and the inner wall of the second installation opening jointly form a cavity;

[0008] A first upper mounting position and a second upper mounting position are provided at the bottom of the upper mold core, the second upper mounting position is arranged in an annular manner around the first upper mounting position, a flow channel communicating with the mold cavity is provided on the upper mold core and the flow channel is located between the first upper mounting position and the first lower mounting position, a first upper sealing rib arranged in an annular manner is provided on the first upper mounting position, and a second upper sealing rib arranged in an annular manner around the first upper sealing rib is provided on the second upper mounting position;

[0009] The top of the lower mold core is provided with the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position, the first lower mounting position is provided with a first lower sealing rib arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib arranged in an annular manner around the first lower sealing rib.

[0010] Preferably, the first upper mounting position is provided with a first positioning protrusion extending downward.

[0011] Preferably, an upper mounting groove is provided on the upper mold core, an upper insert is provided in the upper mounting groove, and the first positioning protrusion is located at the bottom of the upper insert.

[0012] Preferably, the first lower mounting position is provided with a second positioning protrusion extending upward.

[0013] Preferably, an annular positioning protrusion is further provided on the top of the lower mold core, the annular positioning protrusion is arranged in a ring around the second positioning protrusion, and the second lower mounting position is arranged around the annular positioning protrusion.

[0014] Preferably, a lower mounting groove is provided on the lower mold core, a lower insert is provided in the lower mounting groove, and the second positioning protrusion is located at the top of the lower insert.

[0015] Preferably, it also includes a lower pad, which is located at the bottom of the lower mold plate and the lower mold core abuts against the lower pad.

[0016] Preferably, an air extraction hole is provided on the side wall of the cavity.

[0017] Preferably, it also includes a flow channel plate, which is located at the top of the upper template, and an air channel is provided at the bottom of the flow channel plate, and the air channel is connected to the flow channel.

[0018] In the present invention, the improved rubber bushing borderless mold proposed, the top of the lower mold core is provided with the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position, the first lower mounting position is provided with a first lower sealing rib arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib arranged in an annular manner around the first lower sealing rib. Through the above-mentioned optimized and designed improved rubber bushing borderless mold, sealing ribs are arranged at the positions where the upper and lower mold cores cooperate with the skeleton, and after the mold is closed, the template cooperates with the skeleton through the sealing ribs to prevent rubber from overflowing from the edge of the skeleton, improve the injection molding quality, and reduce the generation of flash. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of an improved rubber bushing edgeless mold.

[0020] Figure 2 It is a schematic diagram of the local structure of the inner and outer skeletons installed in the cavity.

[0021] Figure 3 It is a schematic diagram of the local structure of the flow channel plate and the upper template. DETAILED DESCRIPTION

[0022] like Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of an improved rubber bushing edgeless mold proposed by the present invention. Figure 2 This is a schematic diagram of the partial structure of the inner and outer frames installed in the cavity. Figure 3 It is a schematic diagram of the local structure of the flow channel plate and the upper template.

[0023] Reference Figures 1 to 3 The improved rubber bushing edgeless mold proposed by the present invention comprises: an upper mold plate 1, a middle mold plate 2, a lower mold plate 3, an upper mold core 4, and a lower mold core 5;

[0024] The upper mold plate 1, the middle mold plate 2, and the lower mold plate 3 are sequentially stacked, the upper mold plate 1 is provided with a first installation opening, the middle mold plate 2 is provided with a second installation opening, and the lower mold plate 3 is provided with a third installation opening, the first installation opening, the second installation opening, and the third installation opening are sequentially connected, the upper mold core 4 is installed in the first installation opening, the lower mold core 5 is installed in the third installation opening, and the upper mold core 4, the lower mold core 5 and the inner wall of the second installation opening jointly form a cavity 101;

[0025] A first upper mounting position and a second upper mounting position are provided at the bottom of the upper mold core 4, the second upper mounting position is arranged in an annular manner around the first upper mounting position, a flow channel 102 communicating with the mold cavity 101 is provided on the upper mold core 4, and the flow channel 102 is located between the first upper mounting position and the first lower mounting position, a first upper sealing rib 41 arranged in an annular manner is provided on the first upper mounting position, and a second upper sealing rib 42 arranged in an annular manner around the first upper sealing rib 41 is provided on the second upper mounting position;

[0026] The top of the lower mold core 5 is provided with the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position, the first lower mounting position is provided with a first lower sealing rib 51 arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib 52 arranged in an annular manner around the first lower sealing rib 51.

[0027] During the specific working process of the improved rubber bushing borderless mold of this embodiment, the inner and outer skeletons of the annular structure are placed in the mold cavity in advance, and the upper and lower ends of the inner skeleton are respectively against the first upper mounting position and the first lower mounting position, so that the first upper sealing rib and the first lower sealing rib are against the two ends of the inner skeleton, and the outer skeleton is sleeved on the outside of the inner skeleton, and its upper and lower ends are respectively against the second upper mounting position and the second lower mounting position, so that the second upper sealing rib and the second lower sealing rib are against the two ends of the outer skeleton, forming an injection cavity between the inner and outer skeletons, and the flow channel of the upper mold core is connected to the injection cavity. After the mold is closed, the sealing rib is pressed on the skeleton and cooperates with the skeleton seal to prevent rubber from overflowing from the edge of the skeleton.

[0028] In this embodiment, the proposed improved rubber bushing borderless mold has the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position provided on the top of the lower mold core, the first lower mounting position is provided with a first lower sealing rib arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib arranged in an annular manner around the first lower sealing rib. Through the above-mentioned optimized and designed improved rubber bushing borderless mold, sealing ribs are provided at the positions where the upper and lower mold cores cooperate with the skeleton, and after the mold is closed, the template cooperates with the skeleton through the sealing ribs to prevent rubber from overflowing from the edge of the skeleton, improve the injection molding quality, and reduce the generation of flash.

[0029] In order to facilitate the positioning of the inner skeleton, in a specific embodiment, the first upper mounting position is provided with a first positioning protrusion extending downward; correspondingly, the first lower mounting position is provided with a second positioning protrusion extending upward; the upper and lower ends of the inner skeleton are respectively sleeved on the outside of the first positioning protrusion and the second positioning protrusion to achieve positioning.

[0030] In order to improve the applicability and service life of the mold, an upper mounting groove is provided on the upper mold core 4, an upper insert 6 is provided in the upper mounting groove, and the first positioning protrusion is located at the bottom of the upper insert 6; similarly, a lower mounting groove is provided on the lower mold core 5, a lower insert 7 is provided in the lower mounting groove, and the second positioning protrusion is located at the top of the lower insert 7.

[0031] In other specific design methods, in order to facilitate the positioning of the exoskeleton, an annular positioning protrusion 53 is also provided on the top of the lower mold core 5. The annular positioning protrusion 53 is arranged in a ring around the second positioning protrusion, and the second lower mounting position is arranged around the annular positioning protrusion 53; the exoskeleton is sleeved on the outside of the annular positioning protrusion.

[0032] In other specific implementations, the mold of this embodiment further includes a lower pad 8 , which is located at the bottom of the lower mold plate 3 , and the lower mold core 5 abuts against the lower pad 8 .

[0033] In the specific use of the mold of this embodiment, in order to prevent the sealing ribs from hindering the discharge of air in the cavity after the mold is closed, the air in the mold ring can be extracted through the runner before injection molding. At the same time, during injection molding, the negative pressure in the cavity will suck the injection rubber to reduce the generation of bubbles in the finished product.

[0034] In order to facilitate the exhaust of the cavity before injection molding, in other specific embodiments, an exhaust hole is provided on the side wall of the cavity 101; preferably, the mold of this embodiment also includes a runner plate 9, the runner plate 9 is located on the top of the upper mold plate 1, and an air channel 103 is provided at the bottom of the runner plate 9, and the air channel 103 is connected to the runner 101; before injection molding, the air in the mold ring is discharged through the runner and the air channel at the same time, so as to improve the exhaust efficiency and ensure the vacuum degree of the cavity before injection molding.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An improved rubber bushing edgeless mold, characterized in that: include: An upper mold plate (1), a middle mold plate (2), a lower mold plate (3), an upper mold core (4), and a lower mold core (5); An upper mold plate (1), a middle mold plate (2), and a lower mold plate (3) are sequentially stacked; a first mounting opening is provided in the upper mold plate (1), a second mounting opening is provided in the middle mold plate (2), and a third mounting opening is provided on the lower mold plate (3); the first mounting opening, the second mounting opening, and the third mounting opening are sequentially connected; an upper mold core (4) is installed in the first mounting opening, and a lower mold core (5) is installed in the third mounting opening; the upper mold core (4), the lower mold core (5), and the inner wall of the second mounting opening jointly form a mold cavity (101); A first upper mounting position and a second upper mounting position are provided at the bottom of the upper mold core (4), the second upper mounting position is arranged in an annular manner around the first upper mounting position, a flow channel (102) communicating with the mold cavity (101) is provided on the upper mold core (4), and the flow channel (102) is located between the first upper mounting position and the first lower mounting position, the first upper mounting position is provided with a first upper sealing rib (41) arranged in an annular manner, and the second upper mounting position is provided with a second upper sealing rib (42) arranged in an annular manner around the first upper sealing rib (41); The top of the lower mold core (5) is provided with the first lower mounting position corresponding to the first upper mounting position and the second lower mounting position corresponding to the second upper mounting position, the first lower mounting position is provided with a first lower sealing rib (51) arranged in an annular manner, and the second lower mounting position is provided with a second lower sealing rib (52) arranged in an annular manner around the first lower sealing rib (51); The first upper mounting position is provided with a first positioning protrusion extending downward; An upper mounting groove is provided on the upper mold core (4), an upper insert (6) is provided in the upper mounting groove, and the first positioning protrusion is located at the bottom of the upper insert (6); The first lower mounting position is provided with a second positioning protrusion extending upward; A lower mounting groove is provided on the lower mold core (5), a lower insert (7) is provided in the lower mounting groove, and the second positioning protrusion is located at the top of the lower insert (7); An air extraction hole is provided on the side wall of the cavity (101); It also comprises a flow channel plate (9), the flow channel plate (9) being located at the top of the upper mold plate (1), and an air channel (103) being provided at the bottom of the flow channel plate (9), the air channel (103) being in communication with the flow channel (102).

2. The improved rubber bushing edgeless mold according to claim 1 is characterized in that: An annular positioning protrusion (53) is also provided on the top of the lower mold core (5), the annular positioning protrusion (53) is arranged in an annular manner around the second positioning protrusion, and the second lower mounting position is arranged around the annular positioning protrusion (53).

3. The improved rubber bushing edgeless mold according to claim 1 is characterized in that: It also includes a lower pad (8), which is located at the bottom of the lower mold plate (3), and the lower mold core (5) abuts against the lower pad (8).

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