A kind of ball head dust cover borderless mold

Abstract

The present invention proposes a ball head dust cover edgeless mold, comprising an upper mold, a middle mold, a lower mold, and a pad, wherein the upper mold comprises an upper mold plate and a plurality of upper mold cores, and the plurality of upper mold cores are respectively installed in a plurality of upper mold cavities; the middle mold comprises a middle mold plate and a plurality of middle mold cores, and the plurality of middle mold cores correspond to the plurality of upper mold cores one by one and are respectively installed in the plurality of middle mold cavities, and the middle mold core is provided with a hollow cavity; the lower mold comprises a lower mold plate and a plurality of lower mold cores, and the lower mold plate is provided with a plurality of lower mold cavities, and the plurality of lower mold cores correspond to the plurality of middle mold cores one by one and are respectively installed in the plurality of lower mold cavities, and the lower mold core is provided with a vertically penetrating center hole, and a movable mold core is movably installed in the center hole; in the mold closing state, the upper mold core, the lower mold core, and the movable mold core extend into the middle mold core to cooperate to form a molding cavity, and a gap is left between the movable mold core and the upper mold core. The present invention is a cold runner injection edgeless mold, which can be vulcanized quickly and saves vulcanization time.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a borderless mold for a ball head dust cover. Background Art

[0002] The existing ball head dust cover mold structure is generally molded in a compression molding manner, which cannot achieve edgeless. The subsequent tearing edge process is cumbersome, increasing labor costs. There is also the problem of rotting bubbles caused by the inability to exhaust air. The loading and unloading time is long, and the auxiliary time required is long, so the production capacity is low, resulting in the high cost of the ball head dust cover. It is urgent to design a ball head dust cover mold with higher production capacity. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a borderless mold for a ball head dust cover.

[0004] The invention provides a rimless mold for a ball head dust cover, comprising an upper mold, a middle mold, a lower mold, and a pad arranged in sequence from top to bottom, wherein:

[0005] The upper mold comprises an upper mold plate and a plurality of upper mold cores, the upper mold plate is provided with a plurality of upper mold cavities, and the plurality of upper mold cores are respectively installed in the plurality of upper mold cavities;

[0006] The middle mold comprises a middle mold plate and a plurality of middle mold cores, the middle mold plate is provided with a plurality of middle mold cavities vertically penetrating therethrough, the plurality of middle mold cores respectively correspond to the plurality of upper mold cores one by one and the plurality of middle mold cores are respectively installed in the plurality of middle mold cavities, and the middle mold cores are provided with a hollow cavity;

[0007] The lower mold comprises a lower mold plate and a plurality of lower mold cores, the lower mold plate is provided with a plurality of lower mold cavities, the plurality of lower mold cores correspond to the plurality of middle mold cores one by one and the plurality of lower mold cores are respectively installed in the plurality of lower mold cavities, the lower mold core is provided with a vertically penetrating center hole, and a movable mold core is movably installed in the center hole;

[0008] The backing plate is provided with a plurality of mounting grooves corresponding to the plurality of lower mold cores one by one, and a push rod for lifting the movable mold core is installed in the mounting groove, and a spring is sleeved outside the push rod;

[0009] In the mold closing state, the upper mold core, the lower mold core and the movable mold core extend into the middle mold core to cooperate to form a molding cavity, and a gap is left between the movable mold core and the upper mold core.

[0010] Preferably, the upper mold core is stepped near the middle mold core, the top of the hollow cavity of the middle mold core is stepped and the step is matched with the step of the upper mold core, and in the mold closing state, the step surface of the middle mold core is completely fitted with the step surface of the hollow cavity.

[0011] Preferably, a frustum-conical groove is provided at the top of the lower mold core, and the movable mold core is clamped in the frustum-conical groove and completely fits with the frustum-conical groove surface.

[0012] Preferably, the lower mold core is provided with an annular frustum extending outward, and the bottom end of the hollow cavity of the middle mold core is provided with an annular inclined surface matched with the annular frustum. In the mold closing state, the annular turntable is completely fitted with the annular inclined surface.

[0013] Preferably, a gasket is connected to the bottom end of the movable mold core.

[0014] Preferably, a plurality of shoulder bolts are installed at the edge of the middle template, and an annular groove arranged around the shoulder bolts is provided on the middle template on the side of the shoulder bolts close to the lower template, and a plurality of disc springs are installed in the annular groove.

[0015] The invention proposes a ball head dust cover edgeless mold, in which the mold core is designed as a movable insert, which is convenient for replacing the spare mold and improving efficiency; the invention is a cold runner injection edgeless mold, which can be vulcanized quickly and saves vulcanization time. Before injection, there is a gap between the movable mold core and the upper mold core, and the spring pushes the movable mold core upward through the gasket to close the gap for vacuuming. After injection, the movable mold core is pressed to death by the rubber pressure and the lower mold core to prevent rotting and improve product quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a rimless mold for a ball head dust cover proposed by the present invention;

[0017] Figure 2 for Figure 1 Middle AA section view;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 for Figure 2 Enlarged structural diagram at B in the middle. DETAILED DESCRIPTION

[0020] Reference Figure 1-Figure 4 The present invention provides a ball head dust cover edgeless mold, comprising an upper mold, a middle mold, a lower mold, and a pad 8 arranged in sequence from top to bottom, wherein:

[0021] The upper mold comprises an upper mold plate 1 and a plurality of upper mold cores 2. The upper mold plate 1 is provided with a plurality of upper mold cavities, and the plurality of upper mold cores 2 are respectively installed in the plurality of upper mold cavities.

[0022] The middle mold includes a middle mold plate 3 and multiple middle mold cores 4. The middle mold plate 3 is provided with multiple vertically penetrating middle mold cavities. The multiple middle mold cores 4 correspond to the multiple upper mold cores 2 one by one and are respectively installed in the multiple middle mold cavities. The middle mold cores 4 are provided with hollow cavities.

[0023] The lower mold includes a lower mold plate 5 and multiple lower mold cores 6. The lower mold plate 5 is provided with multiple lower mold cavities. The multiple lower mold cores 6 correspond one by one to the multiple middle mold cores 4 and the multiple lower mold cores 6 are respectively installed in the multiple lower mold cavities. The lower mold core 6 is provided with a vertically penetrating center hole. A movable mold core 7 is movably installed in the center hole, and a gasket 12 is connected to the bottom end of the movable mold core 7.

[0024] The backing plate 8 is provided with a plurality of mounting grooves 9 corresponding to the plurality of lower mold cores 6 , and a push rod 10 for lifting the movable mold core 7 is installed in the mounting groove 9 , and a spring 11 is sleeved on the outside of the push rod 10 .

[0025] In the mold closing state, the upper mold core 2 , the lower mold core 6 , and the movable mold core 7 extend into the middle mold core 4 to cooperate to form a molding cavity, and a gap is left between the movable mold core 7 and the upper mold core 2 .

[0026] The present invention designs the mold core as a movable insert, which is convenient for replacing the spare mold and improving efficiency; the present invention is a cold runner injection edgeless mold, which can be vulcanized quickly and save vulcanization time. Before injection, there is a gap between the movable mold core 7 and the upper mold core 2. The spring 11 pushes the movable mold core 7 upward through the gasket 12 to close the gap for vacuuming. After injection, the movable mold core 7 is pressed to death by the rubber pressure and the lower mold core 6 to prevent rotting and improve product quality and production efficiency.

[0027] In a specific embodiment, the upper mold core 2 is stepped near the middle mold core 4, the top of the hollow cavity of the middle mold core 4 is stepped and the step is matched with the step of the upper mold core 2. In the mold-closed state, the step surface of the middle mold core 4 is completely in contact with the step surface of the hollow cavity. The top of the lower mold core 6 is provided with an inverted truncated cone groove, and the movable mold core 7 is clamped in the inverted truncated cone groove and completely in contact with the inverted truncated cone groove surface. The lower mold core 6 is provided with an annular cone extending outward, and the bottom of the hollow cavity of the middle mold core 4 is provided with an annular inclined surface matched with the annular cone. In the mold-closed state, the annular turntable is completely in contact with the annular inclined surface. Through the above three angle differences, a better sealing effect is achieved.

[0028] In a specific embodiment, Figure 4 As shown, a plurality of shoulder bolts 13 are installed at the edge of the middle template 3, and an annular groove arranged around the shoulder bolts 13 is provided on the middle template 3 at the side of the shoulder bolts 13 close to the lower template 5, and a plurality of disc springs 14 are installed in the annular groove. The disc springs 14 and the shoulder bolts 13 are used to exhaust air between the templates. When the press does not apply force, the disc springs 14 bounce up the middle template 3, thereby achieving an exhaust effect between the middle template 3 and the lower template 5.

[0029] 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. A ball head dust cover edgeless mold, characterized in that: It comprises an upper die, a middle die, a lower die and a backing plate (8) which are arranged in sequence from top to bottom, wherein: The upper mold comprises an upper mold plate (1) and a plurality of upper mold cores (2); a plurality of upper mold cavities are formed on the upper mold plate (1); and the plurality of upper mold cores (2) are respectively installed in the plurality of upper mold cavities; The middle mold comprises a middle mold plate (3) and a plurality of middle mold cores (4); the middle mold plate (3) is provided with a plurality of middle mold cavities extending vertically therethrough; the plurality of middle mold cores (4) correspond to the plurality of upper mold cores (2) one by one and the plurality of middle mold cores (4) are respectively installed in the plurality of middle mold cavities; the middle mold cores (4) are provided with a hollow cavity; The lower mold comprises a lower mold plate (5) and a plurality of lower mold cores (6); the lower mold plate (5) is provided with a plurality of lower mold cavities; the plurality of lower mold cores (6) correspond one to one with the plurality of middle mold cores (4); and the plurality of lower mold cores (6) are respectively installed in the plurality of lower mold cavities; the lower mold core (6) is provided with a vertically penetrating center hole; a movable mold core (7) is movably installed in the center hole; A plurality of mounting grooves (9) corresponding one to one with the plurality of lower mold cores (6) are formed on the backing plate (8), a push rod (10) for lifting the movable mold core (7) is installed in the mounting groove (9), and a spring (11) is sleeved on the outside of the push rod (10); In the mold closing state, the upper mold core (2), the lower mold core (6), and the movable mold core (7) extend into the middle mold core (4) to cooperate to form a molding cavity, and a gap is left between the movable mold core (7) and the upper mold core (2); The bottom end of the movable mold core (7) is connected to a gasket (12); A plurality of shoulder bolts (13) are installed at the edge of the middle template (3), and an annular groove arranged around the shoulder bolts (13) is provided on the middle template (3) at a side of the shoulder bolts (13) close to the lower template (5), wherein a plurality of disc springs (14) are installed in the annular groove.

2. The ball head dust cover edgeless mold according to claim 1, characterized in that: The upper mold core (2) is stepped near the middle mold core (4), the top of the hollow cavity of the middle mold core (4) is stepped and the step is matched with the step of the upper mold core (2), and in the mold closing state, the step surface of the middle mold core (4) is completely fitted with the step surface of the hollow cavity.

3. The ball head dust cover edgeless mold according to claim 1, characterized in that: The top of the lower mold core (6) is provided with an inverted frustum groove, and the movable mold core (7) is clamped in the inverted frustum groove and completely fits with the surface of the inverted frustum groove.

4. The ball head dust cover edgeless mold according to any one of claims 1 to 3, characterized in that: The lower mold core (6) is provided with an annular cone extending outward, and the bottom end of the hollow cavity of the middle mold core (4) is provided with an annular inclined surface matched with the annular cone. In the mold closing state, the annular turntable is completely fitted with the annular inclined surface.

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