Integrated mould for coating PU (polyurethane) on surface of automobile armrest and foaming

Abstract

The invention relates to an automobile armrest skin coating PU foaming integrated mold which comprises an upper mold and a lower mold, the upper mold is provided with a PU foaming material injection nozzle, a floating mold is installed in the middle of the lower mold, a plurality of edge covering block assemblies are installed on the periphery of the upper face of the lower mold, and a plurality of hanging needles are further installed on the periphery of the upper face of the lower mold. The automobile armrest comprises a skin and a framework, a plurality of hole grooves are formed in the peripheral edge of the framework, the framework is adsorbed and fixed below the upper die, the periphery of the skin is hooked on the lower die through hanging needles, and the skin is adsorbed on the floating die. The mold has the advantages that the floating mold is designed in the middle of the lower mold to enable the skin to be folded upwards along the periphery of the framework, the periphery of the skin can be pressed on the outer side of the periphery of the framework in cooperation with the edge covering block, the injection holes are reserved in the middle of the framework to ensure that PU foaming materials are injected, and the PU foaming materials penetrate through the hole grooves in the periphery of the framework to make contact with the skin; and curing and bonding are formed after subsequent curing, so that integral forming of skin-coated PU foaming is realized, working procedures are saved, and efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of automobile interior decoration production equipment, and in particular to an automobile armrest skin-coated PU foaming integrated mold. Background Art

[0002] In the past, the production process of automobile armrests was to first foam the cavity of the skeleton and then cover the skin on the outside of the product. Even if the skeleton and skin were put into the mold for foaming together, it was impossible to achieve the fit of the skin around the skeleton. The surface of the skin needed to be coated with glue and then covered. Now, the integrated operation of covering the automobile armrest with PU skin is the current research direction. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a car armrest skin-covered PU foam integrated mold, which has a clever design, a reasonable and compact structure, and is easy to operate, and can be formed by skin-covering PU foam in one piece.

[0004] The technical solution of the present invention: A PU foam integrated mold for covering the skin of an automobile armrest, comprising an upper mold and a lower mold, wherein the middle of the lower part of the upper mold is designed as a product skeleton profiling surface, a plurality of vacuum suction cups are designed in the product skeleton profiling surface or pneumatic fingers are designed on both sides of the product skeleton profiling surface, a PU foaming material injection nozzle is arranged in the middle of the upper mold, a floating mold is designed and installed in the middle of the upper mold, a product skin profiling surface is designed on the floating mold, and a plurality of vacuum adsorption holes are also designed on the product skin profiling surface, a plurality of hemming block components are installed around the upper part of the lower mold, and a plurality of hanging pins are also installed around the upper part of the lower mold; The automobile armrest comprises a skin and a frame, a plurality of holes and grooves are arranged on the edge of the frame, the plurality of holes and grooves connect the inner and outer surfaces of the frame, an injection hole for a PU foam injection nozzle to extend into is reserved in the middle of the frame, and the skin is wrapped around the outer side of the frame; the skeleton contour surface of the product under the upper mold is fixed by adsorbing the skeleton by a plurality of vacuum suction cups or the skeleton is clamped by pneumatic fingers on both sides and the PU foam injection nozzle passes through the injection hole of the skeleton, the skin is hung on the lower mold by hanging hooks around, and a plurality of vacuum adsorption holes on the floating mold simultaneously adsorb the skin to fit the surface of the skin contour surface of the product.

[0005] When the upper mold and the lower mold are closed, the upper mold moves downward with the skeleton, the lower part of the skeleton fits on the surface of the skin, and the floating mold is pressed down to make the periphery of the skin turn up, and then the several edge block assemblies around the lower mold flip over, and the several edge block assemblies continue to fold the flanging of the skin and press it on the position around the skeleton to form an edge, and the edge of the skin is wrapped around the outside of several holes and grooves around the skeleton; at this time, a sealed foaming cavity is formed between the skeleton and the skin; the PU foaming material injection nozzle in the middle of the upper mold injects PU foaming material into the foaming cavity between the skeleton and the skin for foaming molding, and after foaming, the PU foaming material will pass through the several holes and grooves around the skeleton to bond to the edge of the skin; after waiting for the PU foaming material to be foamed and solidified, the upper mold rises to open the mold, and the floating mold pushes the product out of the material.

[0006] The lower end of the floating mold is supported and installed in the middle of the lower mold through a plurality of floating cylinders.

[0007] The hemming assembly comprises an hemming block and a flipping mechanism, wherein the flipping mechanism is mounted on the outer side of the lower die, the hemming block is mounted on the front end of the flipping mechanism, and the flipping mechanism controls the hemming block to perform a directional flipping hemming action.

[0008] The edge binding block may be designed with a strip groove for avoiding hanging needles.

[0009] The automobile armrest includes a skin, a frame and a PU foam material. A plurality of holes and grooves are arranged on the edge of the frame, the plurality of holes and grooves connect the inner and outer surfaces of the frame, an injection hole for a PU foam material injection nozzle to be inserted is reserved in the middle of the frame, the skin is coated on the outer side of the frame, and the frame and the skin are filled with PU foam material. The PU foam material passes through the plurality of holes and grooves of the frame and is cured and bonded to the edge of the skin.

[0010] The advantages of the present invention are ingenious design, reasonable and compact structure, and simple operation. The floating mold designed in the middle of the lower mold can enable the skin to be folded upward along the skeleton, and the edging block can press the edging of the skin around the skeleton to the outside of the skeleton. The injection hole is reserved in the middle of the skeleton to ensure the injection of PU foam material. Several holes and grooves are designed around the skeleton to allow the PU foam material to pass through and contact the skin, and form a cured bond after subsequent curing. There is no need to coat the skin with an adhesive separately, and the skin can be covered with PU foam in one piece, saving processes and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the mold clamping state of the present invention.

[0012] Figure 2 It is a vertical sectional schematic diagram of the present invention.

[0013] Figure 3 It is a longitudinal sectional schematic diagram of the present invention.

[0014] Figure 4It is a schematic diagram of the lower mold of the present invention.

[0015] Figure 5 It is a schematic diagram of the upper mold of the present invention.

[0016] Figure 6 It is a simplified schematic diagram of the epidermis of the present invention after placement.

[0017] Figure 7 It is a simplified schematic diagram of the state in which the upper mold of the present invention carries the skeleton and presses down the skin on the lower mold and the floating mold sinks.

[0018] Figure 8 It is a simplified schematic diagram of the skeleton outer periphery skin edge wrapping state and a simplified schematic diagram of the PU foam material injection nozzle injection state of the present invention. DETAILED DESCRIPTION

[0019] Refer to the attached Figure 1-8 A PU foam integrated mold for covering the skin of an automobile armrest, comprising an upper mold 1 and a lower mold 2. The middle of the lower part of the upper mold 1 is designed as a product skeleton profiling surface, and a plurality of vacuum suction cups are designed in the product skeleton profiling surface or pneumatic fingers are designed on both sides of the product skeleton profiling surface. A PU foaming material injection nozzle 11 is arranged in the middle of the upper mold 1, and a floating mold 3 is designed and installed in the middle of the upper part of the lower mold 2. The upper part of the floating mold 3 is designed as a product skin profiling surface and a plurality of vacuum adsorption holes are also designed on the product skin profiling surface. A plurality of edging block components 4 are installed around the upper part of the lower mold 2, and a plurality of hanging pins 5 are also installed around the upper part of the lower mold 2. The automobile armrest comprises The skin 6 and the skeleton 7 are provided with a plurality of holes and grooves 71 around the edge of the skeleton 7, the plurality of holes and grooves 71 connect the inner and outer surfaces of the skeleton 7, an injection hole 72 for the PU foam injection nozzle 11 to extend into is reserved in the middle of the skeleton 7, and the skin 6 is wrapped around the outer side of the skeleton 7; the skeleton 7 is fixed by adsorbing by a plurality of vacuum suction cups in the product skeleton profiling surface below the upper mold 1, or the skeleton 7 is clamped by pneumatic fingers on both sides and the PU foam injection nozzle 11 passes through the injection hole 72 of the skeleton 7, the skin 6 is hung on the lower mold 2 by the hanging needles 5 around, and the plurality of vacuum adsorption holes on the floating mold 3 simultaneously adsorb the skin 6 to fit the surface of the product skin profiling surface.

[0020] When the upper mold 1 and the lower mold 2 are closed, the upper mold 1 moves downward with the skeleton 7, and the lower part of the skeleton 7 is attached to the surface of the skin 6, and the floating mold 3 is pressed down and sunk, and the lower mold makes the periphery of the skin 6 be flanged upward, and then the several edging block assemblies 4 around the lower mold 2 are turned over, and the several edging block assemblies 4 continue to fold the flange of the skin 6 and press it on the position around the skeleton 7 to form an edging, and the edging of the skin 6 is wrapped around the outside of several holes 71 around the skeleton 7; at this time, a sealed foaming cavity is formed between the skeleton 7 and the skin 6; the PU foaming material injection nozzle 11 in the middle of the upper mold 1 injects PU foaming material into the foaming cavity between the skeleton 7 and the skin 6 for foaming molding, and after foaming, the PU foaming material will pass through the several holes 71 around the skeleton 7 to bond to the edging of the skin 6; after waiting for the PU foaming material to be foamed and solidified, the upper mold 1 rises to open the mold, and the floating mold 3 pushes the product out of the material.

[0021] The lower end of the floating mold 3 is supported and installed in the middle of the lower mold 2 through a plurality of floating cylinders 31 .

[0022] The hemming block assembly 4 includes an hemming block 41 and a flipping mechanism 42. The flipping mechanism 42 is installed on the outside of the lower mold 2. The hemming block 41 is installed at the front end of the flipping mechanism 42. The flipping mechanism 42 controls the hemming block 41 to perform a directional flipping hemming action.

[0023] The edge-wrapping block 41 may be designed with a strip groove 43 for avoiding the hanging needle 5 .

[0024] The automobile armrest includes a skin 6, a frame 7 and a PU foam material. A plurality of holes and grooves 71 are arranged on the edge of the frame 7. The plurality of holes and grooves 71 connect the inner and outer surfaces of the frame 7. An injection hole 72 is reserved in the middle of the frame 7 for the PU foam material injection nozzle 11 to extend into. The skin 6 is coated on the outer side of the frame 7. The frame 7 and the skin 6 are filled with PU foam material. The PU foam material passes through the plurality of holes and grooves 71 of the frame 7 and is cured and bonded to the edge around the skin 6 for curing.

[0025] When the present invention is used, the vacuum suction cup or pneumatic finger on the upper mold is used to fix the skeleton, the PU foam material injection nozzle on the upper mold is used to inject the foam material, and an injection hole is also reserved on the skeleton, and the PU foam material injection nozzle can pass through the injection hole; the skin is first placed on the lower mold and the floating mold through the hanging needle, and the floating mold then attracts the skin through the negative pressure of the vacuum adsorption hole, so that the skin is closely attached to the product skin profiling surface, so that the skin and the skeleton are initially fixed and placed; the mold is closed below, and the upper mold is pressed down on the skin with the skeleton, and the skeleton and the skin are squeezed and sealed around one circle and a foaming cavity is formed between the two. The upper mold continues to press down to make the floating mold go down, and the floating mold goes down in the middle of the lower mold, so that the skin is surrounded by the immovable lower mold. The mold is pushed upward, so that the four sides of the skin are automatically folded, and the edge block components around the lower mold control the edge block to flip the folded skin and continue to fold it around the outer edge of the frame to form an edge, and the edge is wrapped outside the several hole grooves reserved for the frame; the PU foam injection nozzle below extends into the foaming cavity through the injection hole, and a certain amount of PU foam is injected into the foaming cavity. During the foaming process, the PU foam will expand and pass through the several slots reserved around the frame and contact the edge of the skin. Once the PU foam is cured, a cured bond will be formed, so that the edge is firmly wrapped around the outside of the frame to form a finished product. Subsequently, the upper mold moves upward to open the mold, and the floating mold is reset by the floating cylinder, so that the floating mold can discharge the product together.

Claims

1. A PU foaming integrated mold for covering the skin of an automobile armrest, characterized in that: It includes an upper mold and a lower mold. The middle of the lower part of the upper mold is designed as a product skeleton profiling surface. A plurality of vacuum suction cups are designed inside the product skeleton profiling surface or pneumatic fingers are designed on both sides of the product skeleton profiling surface. A PU foaming material injection nozzle is arranged in the middle of the upper mold. A floating mold is designed and installed in the middle of the lower mold. The floating mold is designed as a product skin profiling surface and a plurality of vacuum adsorption holes are also designed on the product skin profiling surface. A plurality of edging block components are installed around the lower mold. A plurality of hanging pins are also installed around the lower mold. The automobile armrest includes a skin , a skeleton, a plurality of holes and grooves are arranged at the edge of the skeleton, the plurality of holes and grooves connect the inner and outer surfaces of the skeleton, an injection hole for the PU foam injection nozzle to extend into is reserved in the middle of the skeleton, and the skin is covered on the outer side of the skeleton; the skeleton is fixed by a plurality of vacuum suction cups in the product skeleton profiling surface under the upper mold, or the skeleton is clamped by pneumatic fingers on both sides and the PU foam injection nozzle passes through the injection hole of the skeleton, the skin is hung on the lower mold by hanging hooks, and a plurality of vacuum adsorption holes on the floating mold simultaneously adsorb the skin to fit the surface of the product skin profiling surface.

2. The one-piece mold for covering the PU foam with the skin of the automobile armrest according to claim 1, characterized in that: When the upper mold and the lower mold are closed, the upper mold moves downward with the skeleton, the lower part of the skeleton fits on the surface of the skin, and the floating mold is pressed down to make the periphery of the skin turn up, and then the several edge block assemblies around the lower mold flip over, and the several edge block assemblies continue to fold the flanging of the skin and press it on the position around the skeleton to form an edge, and the edge of the skin is wrapped around the outside of several holes and grooves around the skeleton; at this time, a sealed foaming cavity is formed between the skeleton and the skin; the PU foaming material injection nozzle in the middle of the upper mold injects PU foaming material into the foaming cavity between the skeleton and the skin for foaming molding, and after foaming, the PU foaming material will pass through the several holes and grooves around the skeleton to bond to the edge of the skin; after waiting for the PU foaming material to be foamed and solidified, the upper mold rises to open the mold, and the floating mold pushes the product out of the material.

3. The one-piece PU foaming mold for covering the skin of an automobile armrest according to claim 1, characterized in that: The lower end of the floating mold is supported and installed in the middle of the lower mold through a plurality of floating cylinders.

4. The one-piece PU foaming mold for covering the skin of an automobile armrest according to claim 1, characterized in that: The hemming assembly comprises an hemming block and a flipping mechanism, wherein the flipping mechanism is mounted on the outer side of the lower die, the hemming block is mounted on the front end of the flipping mechanism, and the flipping mechanism controls the hemming block to perform a directional flipping hemming action.

5. The one-piece PU foaming mold for covering the skin of an automobile armrest according to claim 4, characterized in that: The edge binding block may be designed with a strip groove for avoiding hanging needles.

6. A vehicle armrest according to any one of claims 1 to 5, characterized in that: The automobile armrest includes a skin, a frame and a PU foam material. A plurality of holes and grooves are arranged on the edge of the frame, the plurality of holes and grooves connect the inner and outer surfaces of the frame, an injection hole for a PU foam material injection nozzle to be inserted is reserved in the middle of the frame, the skin is coated on the outer side of the frame, and the frame and the skin are filled with PU foam material. The PU foam material passes through the plurality of holes and grooves of the frame and is cured and bonded to the edge of the skin.

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