3D full-curved-surface refrigerator door body and manufacturing technology thereof

Abstract

The invention discloses a 3D full-curved-surface refrigerator door body and a manufacturing technology thereof, and relates to the technical field of refrigerator door bodies. The refrigerator door body sequentially comprises a door lining, a polyurethane foaming layer, a door shell support frame and a composite door shell from inside to outside, the position between the door lining and the door shell support frame is filled with a polyurethane foaming layer, door decoration strips are fixed to the upper end and the lower end of the door lining, two sides of the door decoration strips are connected with the door lining and the door shell support frame, the composite door shell is formed through hot bending of a composite base plate, the composite base body sequentially comprises a PET protection film, a hardened oleophobic lyophobic coating, a PMMA layer, a PC layer and a PC printing layer from outside to inside, and the PMMA layer and the PC layer make a PMMA / PC composite board to beused through a composite co-extrusion device, after the PMMA layer is hardened, the pencil hardness above 4H can be achieved, product scratch-prevention properties are ensured, the PC layer can ensureenough toughness, the whole impact strength is ensured, and the composite door shell is uniform in wall thicknesses, easy to punch, high in hardness, high wear resistance and easy to form.

Description

technical field [0001] The invention belongs to the technical field of refrigerator doors, and in particular relates to a 3D full-curved refrigerator door and a manufacturing process thereof. Background technique [0002] At present, the shape of the refrigerator door shell is usually flat or single-curved, and it is an assembled structure, while the 3D full-curved integrated door shell usually has the problem of uniform wall thickness molding, especially the molding problem of the patterned door shell. The usual 3D full-curved integrated door shell uses materials and molding methods, generally in the following ways: [0003] Method 1: Use the color coating process to make a patterned steel plate, and then form it into a 3D full-curved refrigerator door shell through deep drawing; [0004] Method 2: After the surface of the colored pre-coated steel plate is transferred to the pattern by heat transfer printing, it is formed into a 3D full-curved refrigerator door shell by de...

AI Technical Summary

Problems solved by technology

[0006] If method 1 is used, the color-coated steel plate is formed by deep drawing, and the steel plate is stretched too large, especially if it reaches more than 40mm, there are the following defects: ① The uniform wall thickness of the steel plate base material is destroyed, and the thin wall part of the excessive stretching is easy Cracking; ②PVC or PET color film attached to the surface of the color steel plate, when the full curved surface is stretched and deformed, there is a risk of color film cracking at the position of deep drawing and corner wrapping

③The surface decoration pattern is a flat effect, which cannot achieve three-dimensional and dynamic effects

The above defects lead to the failure of the product to meet the appearance requirements, and the defect rate is high;

[0007] If method 2 is adopted, the color pre-coated steel plate is transferred to the steel plate with the pattern transferred by heat transfer printing process, and the stretched size of the steel plate is too large, especially if it reaches more than 40mm, there are the following defects: ① The uniform wall thickness of the steel plate base material is destroyed, and the wall The thin part is easy to crack, ②The ink may be roughened or cracked at the position of bending, deep drawing and corner wrapping

③The surface decoration pattern is a flat effect, which cannot achieve three-dimensional and dynamic effects

The above defects lead to the failure of the product to meet the appearance requirements, and the defect rate is high; at the same time, the cost is high

[0008] If method 3 is adopted, ABS plastic is integrally injection molded after adding color masterbatch, because the size of the refrigerator door is large, the one-time mold cost is high, the injection molding process requires high requirements, special dyeing materials need to be purchased, and the appearance protection requirements during production are high; at the same time, the overall ABS injection molding can make a variety of color door shells with dyeing materials, but it cannot make the appearance pattern of the door body

[0009] Therefore, under the trend of pursuing personalization and customization of products, existing refrigerator steel door shells or plastic injection molded door shells have defects in manufacturing molding and appearance decoration patterns

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