RU2572458C1 - Method for production of top cover for washing machine - Google Patents

Abstract

FIELD: textiles, paper.

SUBSTANCE: plate of chipboard (CB) with a laminated coating is placed in a mould and connected along the contour with an edge strip frame made of casting polymeric material, with a connecting profile made on the inner contour of the edge strip frame. The CB plate is preliminary purified, and the protecting or binding material or their mixture is applied to the ends. The CB plate is placed in a mould preheated to a temperature of 50 to 80°C, and moulding of an edge strip frame is carried out under the pressure of from 400 to 600 bar. The generated bonding profile is made with a depth of 0.1 to 1.5 of the CB plate thickness. The lower shelf of the bonding profile is made with a thickness of at least 0.2 of the CB plate thickness. The cover is kept in the mould for at least 50 seconds and removed from the mould.

EFFECT: provision of flowing the casting material into the pores and chips of the CB plate, improved productivity and service life, prevention of separation of the chipboard material particles from the CB plate, reduction of deformation.

6 cl, 3 dwg

Description

The invention relates to methods for manufacturing the top cover for a washing machine, and is also suitable for the manufacture of covers for household appliances, in particular, covers for dishwashers.

A known method of manufacturing countertops, which consists in the fact that they take two concentric edging frames and between them establish a plate of wood chipboard (chipboard). The outer bezel is designed for design, and the inner bezel contains protrusions and clips for fixing the plate of chipboard and bezel frames to each other. A flexible insulating gasket is inserted along the edge of the upper and lower surface of the chipboard plate and the edging frame. [one]

The disadvantage of this method is that a flexible insulating gasket does not provide reliable sealing of the ends of the plate from the chipboard from possible ingress of liquid or liquid vapor, which leads to swelling of the plate.

A known method of manufacturing countertops for washing machines, which consists in the fact that a plate of chipboard is inserted into the groove of a flexible edging frame. The groove of the edging frame is located on the inner contour of the edging frame and is wider than the overall dimensions of the chipboard plate. Then, through the holes in the lower flange of the edging frame groove, a sealing material (for example, on a silicone base) is injected between the ends of the chipboard plate and the inner surface of the groove. [2]

This manufacturing of the top cover for the washing machine also does not ensure the tightness of the ends of the plate from chipboard, requires additional equipment and equipment, which leads to an increase in energy consumption and labor intensity of the manufacturing process, an increase in material consumption, and a decrease in quality and productivity.

Closest to the proposed one is a method of manufacturing a top cover for a washing machine, in which a laminated chipboard plate is placed in a mold and then connected by a connecting profile to a edging frame made of injection-molded polymer material during injection molding of the edging frame. The connecting profile with its shelves covers along the contour the ends, upper and lower edges of the surface of the laminated particleboard plate. [3]

This method of manufacturing a top cover for a washing machine is essentially similar to the claimed method, but with known injection molding parameters it does not provide filling of chips and pores on the surfaces and ends of a chipboard plate formed by sawing a chipboard with a laminated coating. During operation, it is possible for liquid vapor to penetrate into the plate from the chipboard through microroughnesses, chips, pores, which leads to swelling of the chipboard plate and a decrease in its service life. In addition, when a melt of a polymeric material is exposed to a chipboard plate during casting of the edging frame, particles of particleboard material detach from surfaces and ends, and their removal to the front surface of the edging frame leads to a decrease in the yield of suitable products. Due to the fact that the lid has large overall dimensions, and when the casting material cools down, significant shrinkage occurs, this leads to deformation (warping and twisting) of the chipboard plate and the edging frame.

The objective of the invention is to improve the quality and reduce marriage in the manufacture of the top cover for the washing machine.

The technical result to which the invention is directed is to ensure that the injection material flows into the pores and chips of a laminated particleboard chipboard, increase productivity and service life, prevent tearing particles of chipboard from a laminated particleboard chipboard, and reduce deformation.

The specified technical result is achieved in that a method of manufacturing a top cover for a washing machine, in which a plate of chipboard with a laminated coating is placed in the mold and connected along the contour with a edging frame made of injection-molded polymeric material, a connecting profile made on the inner contour of the edging framework, during injection molding, the binding profile covers the ends and edges of the upper and lower surfaces of the laminated particleboard plate and the finished top cover for washing The machine is removed from the mold according to the invention, the plate from the chipboard with a laminated coating is pre-cleaned and a protective or binder material, or a mixture thereof, is applied to the ends, then the plate from the chipboard with a laminated coating is placed in a preheated to a temperature of from 50 to 80 ° C mold and cast the edging frame under pressure from 400 to 600 bar, while the resulting binder profile is performed with a depth of 0.1 to 1.5 thickness of the chipboard plate with a laminated coating, and the lower shelf of the binder profile t with a thickness equal to at least 0.2 of the thickness of the laminated particleboard plate, then the top cover for the washing machine is kept in the mold for at least 50 s and removed from the mold.

Besides:

laminated chipboard plate has a thickness of 6 to 16 mm;

the edging frame is made of injection-molded polymeric material - ABS plastic or polypropylene;

a laminated-coated chipboard plate is cleaned mechanically or by air;

as a protective material use varnish or paint, or a primer, and as a binder material - glue;

the material deposited on the ends of the laminated chipboard plate is dried.

These signs are significant and interrelated with the formation of a stable set of signs sufficient to obtain the specified technical result, including:

placing a plate of chipboard with a laminated coating in the mold and connecting it along the contour with the edging frame made of injection-molded polymeric material, a binding profile made on the inner contour of the edging frame during injection molding. In this case, the binding profile covers the ends and edges of the upper and lower surfaces of the laminated particleboard plate. Preliminary cleaning and applying to the ends of the protective or binder material or their mixture. These signs prevent the separation of particles of particleboard material from the ends of the chipboard plate with a laminated coating during injection molding of ABS plastic or polypropylene, which eliminates the removal of particles of particleboard material on the front surface of the edging frame;

placing a laminated chipboard plate into a mold preheated to a temperature of 50 to 80 ° C significantly reduces the exposure time in the mold and increases productivity;

the implementation of the process of casting the edging frame under pressure from 400 to 600 bar ensures leakage of the casting material in microroughness, chips, pores of the ends of the plate from chipboard with a laminated coating, thereby improving the quality of the lid;

the implementation of the binder profile with a depth of 0.1 to 1.5 of the thickness of the laminated chipboard plate, and the lower shelf of the bonding profile with a height of at least 0.2 the thickness of the laminated chipboard plate, allows to increase the longevity of the lid, preventing the entry of liquid vapor laminated wood chipboard plates in wood material, preserving specified strength characteristics;

the exposure of the manufactured upper cover for the washing machine in the mold for at least 50 s eliminates warping and bloating of the edging frame, provides its high-quality surface, in particular, the gloss of the edging frame and the absence of tightenings.

The stated essence of the claimed invention is illustrated by the drawings shown in FIG. 1-3:

in FIG. 1 is a perspective view of a top cover for a washing machine - top view;

in FIG. 2 - top view;

in FIG. 3 is a section AA in FIG. one.

The top cover for the washing machine contains: a plate 1 made of chipboard with a laminated coating, a fringing 2 frame made of injection-molded polymer material, a binder 3 profile fringing 2 frames, a protective or binding material, or a mixture of 4.

A method of manufacturing a top cover for a washing machine is as follows.

A pre-cut plate 1 made of laminated particleboard with a laminated coating, before laying into the mold, is cleaned of particles of wood-shaving material, which after sawing are on the laminated particleboard plate 1 with a laminated coating at its ends. Then, a protective or binder material, or a mixture of them, is applied to the ends of the laminated particleboard plate 1, or a mixture of them 4. After that, the laminated particleboard plate 1 is laid in a mold preheated from 50 to 80 ° C (in a strictly defined place), consisting of a fixed and movable half-matrix mounted on an injection molding machine (not shown). They close the mold and inject the injection molding polymer material - ABS plastic or polypropylene. A laminated particleboard plate 1 with a laminated coating with a 2 rim frame is connected along the contour by covering the ends and edges of the upper and lower surfaces of the laminated particleboard plate 1 with a binder 3 profile during casting of the 2 rim frame under pressure from 400 to 600 bar. In this case, the resulting binder 3 profile is performed with a depth of 0.1 to 1.5 thickness of the plate 1 from chipboard with a laminated coating, and the lower shelf 5 of the binder 3 profile is made with a height equal to at least 0.2 thickness of the plate 1 of chipboard with a laminated coating. Then, the manufactured top cover for the washing machine is kept in the mold for at least 50 s and is removed from it.

A laminated-coated chipboard plate 1 has a thickness of 6 to 16 mm. Edging 2 frame is made of ABS plastic or polypropylene. The laminated-coated chipboard plate 1 is cleaned mechanically or by air. As a protective material applied to the ends of the laminated chipboard plate, varnish or paint or a primer is used, and glue is used as a binder. The material deposited on the ends of the chipboard plate is dried.

An example implementation of the method.

Take plate 1 from a chipboard with a laminated coating with overall dimensions of 500 by 300 mm and a thickness of 10 mm, clean, including the ends, of wood-shaving particles by suction with a vacuum cleaner. Apply protective material 4 (quick-drying varnish) to the ends and for convenience of further work with the laminated-coated chipboard plate 1, the protective material 4 is dried. Place the plate 1 of the chipboard with a laminated coating in a mold (not shown), preheated to a temperature of from 50 to 80 ° C, in a precisely installed place. The mold is closed and the molten ABS plastic is injected into the mold, the temperature of which in the zone of the nozzle is 270 ° C. The edging 2 frame is cast under a pressure of 400 bar, connecting the edging 2 frame with the plate 1 from chipboard with a laminated coating with a binder 3 profile. The binder 3 profile encompasses along the contour the ends and edges of the upper and lower surfaces of the laminated particleboard plate 1. The resulting binder 3 profile is performed with a depth of 0.1 to 1.5 of the thickness of the plate 1 from chipboard with a laminated coating. The lower shelf of the binder profile 3 is performed with a height equal to at least 0.2 the thickness of the plate 1 from chipboard with a laminated coating. The manufactured top cover for the washing machine is held in the mold for at least 50 seconds, and the finished top cover for the washing machine is removed from the mold.

In the same way, the top cover for the washing machine is made using various materials, material combinations and casting modes:

use a plate 1 of chipboard with a laminated coating with a thickness of 6 to 16 mm;

edging frame 2 is made of injection-molded polymeric material - ABS plastic or polypropylene;

the ends of the laminated-coated chipboard plate 1 are coated with a protective or binding material or mixture in any percentage of protective and binding material;

as a protective material use varnish or paint, or a primer. As a binder, glue is used;

the edging 2 frame is cast under a pressure of 600 bar;

the resulting binder 3 profile is made with a depth of 0.1 to 1.5 times the thickness of the laminated chipboard plate, and the lower shelf of the 3 profile binder is made with a thickness equal to at least 0.2 of the thickness of the laminated chipboard plate;

held in the mold for at least 50 s and the finished top cover for the washing machine is removed from the mold.

The tests of the manufacturing method of the upper cover for the washing machine showed that when casting the border 2 of the frame and connecting it to the plate 1 from chipboard with a laminated coating under pressure from 400 to 600 bar in the mold, the injection material flows into the pores and chips of the plate from Particleboard, increases productivity and service life, prevents the separation of particles of particleboard material from the plate 1 from particleboard with a laminated coating, reduces warpage of the top cover for the washing machine.

The manufacture of the top cover for a washing machine under a pressure of less than 400 bar in the mold does not provide a high production yield of the finished product, since such pressure is not enough for high-quality product formation and flow of injection material in microroughness, chips, pores of the ends of the plate 1 from laminated particleboard . The manufacture of the top cover for a washing machine under a pressure of more than 600 bar in the mold also does not provide high quality and high production yield of the finished product, since at this pressure the edge surfaces of plate 1 are deformed from the laminated particleboard.

Information sources

1. Application for invention EP 0672368.

2. Application for invention GB 2330524.

3. Application for invention EP 1544346.

Claims (6)

1. A method of manufacturing a top cover for a washing machine, in which a plate of chipboard with a laminated coating is placed in the mold and connected along the contour with the edging frame made of injection-molded polymeric material, a connecting profile made on the inner contour of the edging frame during the casting process under pressure, the binding profile covers the ends and edges of the upper and lower surfaces of the laminated particleboard plate and the finished top cover for the washing machine is removed from the injection mold, which distinguishes I mean that the plate made of chipboard with a laminated coating is pre-cleaned and a protective or binder material, or a mixture of them, is applied to the ends, then a plate of chipboard with a laminated coating is placed in a mold pre-heated to a temperature of 50 to 80 ° C and cast a fringing frame under pressure from 400 to 600 bar, while the resulting binding profile is performed with a depth of 0.1 to 1.5 thickness of the chipboard plate with a laminated coating, and the lower shelf of the connecting profile is made with a thickness equal to at least 0.2 layer thickness laminated chipboards, in addition, the top cover for the washing machine is kept in the mold for at least 50 s and then removed from the mold. 2. The method according to p. 1, characterized in that the plate of chipboard with a laminated coating has a thickness of from 6 to 16 mm 3. The method according to p. 1, characterized in that the edging frame is made of injection-molded polymer material - ABS plastic or polypropylene. 4. The method according to p. 1, characterized in that the plate of chipboard with a laminated coating is cleaned mechanically or by air. 5. The method according to p. 1, characterized in that as a protective material using varnish or paint, or a primer, and as a binder material - glue. 6. The method according to p. 1, characterized in that the material deposited on the ends of the laminated chipboard plate is dried.

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