CN116922697A - Anti-shaping mould that bordures - Google Patents

Abstract

The invention provides a reverse-edging forming die which comprises an upper die and a lower die, wherein the lower die is provided with a lower film frame and a lower bottom plate, the lower film frame is provided with a die cavity matched with the upper die, a die core is arranged in the die cavity, a diaphragm is placed at the top of the die core, a first extrusion spring is arranged at the bottom of the die core, four sliding blocks which slide back and forth in the front-back left-right direction are respectively arranged around the film cavity, a first guide hole for sliding a shovel base is arranged on each sliding block, a second guide hole for sliding the shovel base is respectively arranged around the lower film frame, the shovel base is in sliding connection with the sliding blocks and the lower film frame through the first guide hole and the second guide hole and is fixed on the lower bottom plate, a second extrusion spring is arranged between the bottom of the lower film frame and the top of the lower bottom plate, and a reverse-edging bulge is arranged at the inner side of the top of the sliding blocks. Through shovel base combination extrusion spring design, drive the slider and remove towards the inboard when the mold core descends, rely on a set of power device to realize automatic anti-shaping of borduring, simple structure, degree of automation is high.

Description

Anti-shaping mould that bordures

Technical Field

The invention relates to the technical field of in-mold injection molding, in particular to a reverse edging forming mold.

Background

The principle of in-mold injection molding is that a printed film sheet is placed into an injection mold, and then gum is injected on the back surface of a diaphragm, so that the resin and the diaphragm are combined into a whole for curing and molding, and the resin and the diaphragm are integrated with printing, molding and injection molding process technologies into a whole, and are widely applied to decoration and function control panels of household appliances, automobile instrument panels, air-conditioning panels, mobile phone shells, lenses, washing machines, refrigerators and the like. The membrane reverse edge-wrapping modeling can effectively improve the overall appearance quality of the product, however, the current reverse edge-wrapping die is assembled up and down and the movement of the edge-wrapping sliding block depends on respective power devices, and the structure is complex and the production cost is high.

Disclosure of Invention

The invention aims to provide a reverse edging forming die which is used for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a form die of borduring in reverse, includes mould, lower mould, the lower mould is equipped with down membrane frame and lower plate, down membrane frame be equipped with last mould complex die cavity, the inside mold core that has of die cavity, the diaphragm is placed at the mold core top, the mold core bottom is equipped with first extrusion spring, four direction gliding sliders around each setting up around the membrane cavity, every all be provided with on the slider and supply shovel base gliding first guiding hole, down membrane frame respectively be provided with around and supply shovel base gliding second guiding hole, shovel base pass through first guiding hole and second guiding hole with slider and lower membrane frame sliding connection, and be fixed in the lower plate, be equipped with the second extrusion spring between lower membrane frame bottom and the lower plate top, the slider top inboard is equipped with the arch of borduring in reverse, the slider accompanies down membrane frame for shovel base up-and-down motion, down, the slider moves to the inboard and is close to the mold core, and upward, the slider moves and keeps away from outside.

Further, the upper die is provided with an upper bottom plate, a fixing plate and a male die from top to bottom.

Further, the first guide hole is inclined inwards from top to bottom, and the second guide hole is vertical from top to bottom.

Further, the first guide hole is a through hole with straight sides and semicircular sides, the second guide hole is a circular through hole, and when the device is not in operation, the inner semicircular side of the bottom of the first guide hole is overlapped with the inner semicircular side of the top of the second guide hole.

Further, the shovel base comprises an A section, a B section and a C section which are connected from top to bottom, wherein the A section is positioned in the first guide hole, the C section is positioned in the second guide hole, the B section is positioned in the second guide hole before die assembly, and the B section is positioned in the first guide hole after die assembly.

The beneficial effects of the invention are as follows:

1. according to the invention, through the design of combining the shovel base with the extrusion spring, the sliding block is driven to move inwards while the mold core descends, and the purpose of automatic reverse edge covering molding is realized by means of a set of power device.

2. The die disclosed by the invention is ingenious in design, simple in structure and high in automation degree.

Drawings

FIG. 1 is a schematic cross-sectional front view of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional front view of an embodiment of the present invention after mold closing;

FIG. 3 is an enlarged schematic view of a portion of the lower die of FIG. 1;

FIG. 4 is an enlarged schematic view of a portion of the lower die of FIG. 2;

FIG. 5 is a schematic view of the structure of FIG. 2 at D in a partially enlarged manner;

FIG. 6 is a cross-sectional view of a first pilot hole according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a second pilot hole according to an embodiment of the present invention.

In the figure: 1. the die comprises an upper die, 2, a lower die, 3, an upper bottom plate, 4, a fixing plate, 5, a male die, 6, a lower film frame, 7, a lower bottom plate, 8, a die cavity, 9, a die core, 10, a diaphragm, 11, a first extrusion spring, 12, a sliding block, 13, a shovel base, 14, a first guide hole, 15, a second guide hole, 16, a second extrusion spring, 17 and a reverse edge-wrapping protrusion.

Detailed Description

The invention will be further described with reference to the accompanying drawings, in conjunction with the specific embodiments, but the scope of the invention is not limited to the description. Any modification, equivalent replacement, improvement, etc. made within the gist of the present invention should be included in the scope of protection of the present invention.

It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component, merely for convenience and clarity in assisting in describing embodiments of the present invention.

Referring to fig. 1 to 5, a reverse edging injection mold comprises an upper mold 1 and a lower mold 2, wherein the upper mold 1 is provided with an upper bottom plate 3, a fixing plate 3 and a male mold 5 from top to bottom; the lower die 2 is provided with a lower film frame 6 and a lower bottom plate 7, the lower film frame 6 is provided with a die cavity 8 matched with the male die 5, a die core 9 is arranged in the die cavity 8, a diaphragm 10 is placed at the top of the die core 9, a first extrusion spring 11 is arranged at the bottom of the die core 9, four sliding blocks 12 which slide back and forth in four directions are respectively arranged around the die cavity 8, each sliding block 12 is provided with a first guide hole 14 which inclines inwards, the periphery of the lower film frame 6 is provided with a second vertical guide hole 15, a shovel base 13 is in sliding connection with the sliding blocks 12 and the lower film frame 6 through the first guide holes 14 and the second guide holes 15, the shovel base 13 is fixed on the lower bottom plate 7, a second extrusion spring 16 is arranged between the bottom of the lower film frame 6 and the top of the lower bottom plate 7, and the inner side of the top of the sliding block 12 is provided with a reverse edge-wrapping bulge 17.

In a specific embodiment, the first guide hole 14 is a through hole with straight sides and semicircular sides, the cross section of which is shown in fig. 6, and the second guide hole 15 is a circular through hole, the cross section of which is shown in fig. 7, and before clamping, the semicircular side on the inner side of the bottom of the first guide hole 14 overlaps with the semicircular side on the inner side of the top of the second guide hole 15.

In one embodiment, referring to fig. 1 to 4, the shovel base 13 includes a section a, a section B and a section C that are connected from top to bottom, wherein the section a is located in the first guide hole 14, the section C is located in the second guide hole 15, and the section B is located in the second guide hole 15 before mold clamping and in the first guide hole 14 after mold clamping.

In operation, after the membrane 10 is put on the mold core 9, the membrane is softened by a heating unit (not shown), the upper mold and the lower mold are clamped, the male mold 4 downwardly extrudes the mold core 9, the first extrusion spring 11 at the bottom of the mold core 9 is compressed, the mold core 9 descends, meanwhile, the first extrusion spring 11 is in force transmission, the lower mold frame 6 is compressed, then the second extrusion spring 15 is extruded, the sliding block 12 descends along with the lower mold frame 6, the shovel base section B enters the first guide hole 14 to generate forward thrust so that the sliding block 12 (shown by an arrow in fig. 2) moves inwards to be close to the mold core 9, the reverse wrapping action is realized, 180-degree bending of the membrane is completed under the clearance of the mold design, the structure of the membrane reverse wrapping is formed, the sliding block 12 ascends along with the lower mold frame 6 after the pressure release, the shovel base section B returns to the second guide hole 15, reverse thrust is generated, the sliding block 12 moves outwards to be far away from the mold core 9, and finally the mold core 9 is opened smoothly.

Claims (5)

1. The utility model provides a form die of borduring, its characterized in that, including last mould, lower mould, the lower mould is equipped with down membrane frame and lower plate, down membrane frame be equipped with last mould complex die cavity, there is the mold core in the die cavity inside, the diaphragm is placed at the mold core top, the mold core bottom is equipped with first extrusion spring, the membrane cavity respectively sets up four direction round trip sliding sliders around, every all be provided with on the slider and supply shovel base gliding first guiding hole, down membrane frame respectively be provided with around and supply shovel base gliding second guiding hole, shovel base pass through first guiding hole and second guiding hole with slider and lower membrane frame sliding connection, and be fixed in the lower plate, be equipped with the second extrusion spring between lower membrane frame bottom and the lower plate top, the slider top inboard is equipped with the arch of borduring, the slider accompanies down membrane frame for shovel base up-down motion, during down, the slider moves to the inboard and is close to the mold core, during upward, the slider moves outwards and keeps away from the mold core.

2. The reverse hemming forming die of claim 1 wherein the upper die is provided with an upper base plate, a fixing plate and a male die from top to bottom.

3. The reverse hemming forming die of claim 1 wherein the first guide hole is inclined inwardly from top to bottom and the second guide hole is vertical.

4. A reverse hemming forming die according to claim 3 wherein the first guide hole is a through hole with straight sides and semicircular sides, the second guide hole is a circular through hole, and the semicircular side on the inner side of the bottom of the first guide hole overlaps with the semicircular side on the inner side of the top of the second guide hole before die assembly.

5. The reverse hemming forming die of claim 1 wherein the spade base includes a section a, a section B and a section C connected from top to bottom, the section a being located in the first guide hole, the section C being located in the second guide hole, the section B being located in the second guide hole before clamping and in the first guide hole after clamping.