KR20030091878A - The methode of door manufacture and the plastics door - Google Patents

Abstract

PURPOSE: A synthetic resin door and a method for manufacturing the synthetic resin door are provided to easily manufacture the synthetic resin door by an injection-molding method, to freely handle for the light weight, to protect a heat insulating material foamed and kept from the outside by integrally molding a frame of a constant thickness to four sides of the door, and to improve the side appearance of the door. CONSTITUTION: A synthetic resin door(1) is composed of a frame(2) of a constant thickness made from hard synthetic resin and formed into a square shape to have a heat insulating material housing space therein; front and rear sheet materials(3,3') integrally attached to front and rear sides with placing the frame between the front and rear sheet materials and composed of a metal steel plate or a hard synthetic resin sheet body; thick section components formed to some parts of both sides of the frame to install a connecting hinge and a locking member applied to the door; and a heat insulating material(5) foamed and filled in the heat insulating material housing space and integrated with the frame.

Description

Synthetic resin door and its manufacturing method {THE METHODE OF DOOR MANUFACTURE AND THE PLASTICS DOOR}

The present invention relates to a synthetic resin door formed by a mold and a manufacturing method thereof.

More specifically, it is easy to manufacture due to foam molding and is light in weight, so it is easy to handle, and integrally forms a rim of a predetermined thickness on all sides of the door to protect the heat-insulating material stored inside from the outside and the side of the door. To improve aesthetics,

By placing thick parts locally on both sides of the rim, the hinge and locking member to be applied to the door can be applied stably and firmly. It can be manufactured to be robust to increase the reliability of the product.

There are three types of general doors that have been used in the prior art.

Firstly, there is a wooden door formed by forming a frame made of wood, applying adhesive on both sides, and then attaching plywood, which is used by screwing the door frame and the hinge. There is a problem with leaving

Each corner of the door touches the door frame and wears out the gap, and it is not sealed with the door frame due to the warp of the wood itself. The problem is that the door's life is shortened due to its unstable structure and corrosion.

Second, there is an entrance door that combines a glass window with a frame made of aluminum sash, which does not have the problem of twisting of the door itself or loosening of the screw part combined with the hinge. When the glass window is broken, the glass window has to be replaced from time to time, and the inside of the glass is a problem for security.

Lastly, there is a steel door formed by forming a frame made of wood, inserting honeycomb into the inside, applying adhesive on both sides, bonding the steel plate, and bolting a frame of "H" type to the periphery of the steel door. ,

Due to its complicated structure, the manufacturing cost is high because of its high manufacturing cost, and it is difficult to install, and there is also a problem in installation. There was a problem that I had to look bad and have to replace radish.

Recently, various types of molding doors are manufactured using synthetic resins to replace wooden doors.

Synthetic resin door is mainly made of extruded PVC, ABS or fiber-reinforced plastic material to make the door frame, attach decorative sheet film on the surface, and expand the synthetic resin inside the door or fill the honeycomb paper reinforcement The wooden wick is placed on the outside and cut and sold according to the size required by the consumer.

Such a synthetic resin door has advantages of durability, dimensional stability and moisture resistance superior to wood doors, but it is manufactured by integrally plywood by inserting a wooden core between two panels molded of synthetic resin, and the edges of both panels The core is inserted in between and is integrally bonded by an adhesive, and the panel and the core are arranged in parallel with each other.

Accordingly, since the joint portion of the panel and the core is exposed to the outside, there is a high possibility of breakage, and in particular, there has been a chronic problem in that the adhesive state is destroyed by moisture or the like.

On the other hand, in order to solve such a chronic problem, there has been a structure in which an edge neck is additionally attached to the front end face of the door, but the door has the same state that the adhesive state of the edge neck is destroyed. Of course, there is a problem that the aesthetic appearance is deteriorated due to the attachment of the edge neck, the cost increases with the addition of the process in the manufacturing process.

In addition, the wooden wick closing the side of the door is not formed as a single body, but is composed of an adhesive, so that the aesthetics are poor and the supporting force and durability are weak, which is easily broken by external force, thereby causing the internal insulation to be exposed to the outside.

In addition, the hinge and the locking member should be applied to the wood wick, so that the thickness must be thickened to give sufficient support strength, thereby causing inconvenience in handling and an increase in manufacturing cost due to an increase in weight.

The present invention has been made in consideration of the above circumstances,

The purpose of the present invention is easy to manufacture through injection molding, light weight and easy to handle, and by molding the rim of a certain thickness integrally on all sides of the door to increase the durability and to protect the insulation to be foamed inside from the outside and To improve the side aesthetics of the door,

Locally placed thick parts on both sides of the frame so that the hinge and the locking member to be applied to the door can be applied stably and firmly, thereby preventing corrosion of the metal part due to condensation phenomenon and firm adhesion by foaming of the synthetic resin The present invention provides a synthetic resin door and a method of manufacturing the same, which can be manufactured firmly, thereby increasing the reliability of the product.

Hereinafter, the configuration and manufacturing process of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a device that is applied to manufacture a synthetic resin door of the present invention.

2 to 5 are manufacturing process diagrams for explaining the manufacturing method of the present invention.

6 is a cross-sectional view of the door molded by the present invention.

Figure 7 is a cross-sectional view showing another configuration example of the present invention.

※ Explanation of code about main part of drawing ※

1: door 2: border

2 ': Insulation space 3, 3': Front and back plate

4, 4 '; Thickening 5: Insulation

10: lower mold 20: middle mold

21: space part 30: core

31, 32: recessed part 40: upper mold

1 is an exploded perspective view showing an apparatus applied to manufacture a synthetic resin door of the present invention, Figures 2 to 5 is a manufacturing process diagram for explaining the manufacturing method of the present invention. Figure 6 shows a cross-sectional view of the door molded by the present invention,

The synthetic resin door 1 of the present invention,

A border (2) having a predetermined thickness formed of a rectangular frame shape so as to be provided with a heat insulating material receiving space (2 ') inside of a hard synthetic resin material;

Front and back plates (3) (3 '), which are integrally attached to the front and rear surfaces with the edge (2) interposed therebetween and composed of a metal steel plate or a hard synthetic resin plate;

Thick parts (4) and (4 ') for installing a connecting hinge and a locking member which are formed at both sides of the edge (2) and applied to the door;

Foam insulation is filled in the heat insulating material receiving space (2 ') is to include a heat insulating material (5) integrally configured with the edge (2).

The manufacturing method for manufacturing the synthetic resin door 1 of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 5.

The space 21 has a rectangular space 21 of the same size as the size of the door 1 on the lower mold 10 and the intermediate mold 20 is configured to be bisected if necessary. The first plate member P1 made of metal or hard synthetic resin constituting one of the front and rear plate members 3 and 3 'of the door 1 is mounted therein, and the insulating material accommodating space 2' and the concave portion are placed. A first step S1 of setting the core 30 for forming the thick portions 4 and 4 'through the 31 and 32;

A second step (S2) of filling a hard thermosetting synthetic resin material for forming an edge (2) in a gap formed between the space portion (21) and the edge of the core (30);

The upper mold 40 is set on the intermediate mold 20 where the second step S2 is completed, and then heated to a predetermined temperature to harden a material for forming an edge, thereby integrating with the first plate P1. A third step S3;

In the state in which the third step S3 is completed, the upper mold 40, the core 30, and the middle mold 20 are demolded, and the first plate material P1 is attached to the bottom surface of the lower mold 10. (4) a fourth step (S4) to remain only;

A fifth step (S5) of filling the foamable insulating material into the insulating material receiving space 2 'of the edge 2 and placing the first plate P1 on the upper surface of the edge 2 so that the insulating material is hermetically received. Wow;

Set the upper mold 40 on the first plate (P1) of the fifth step (S5) and heated to a predetermined temperature to the edge (2) and the second plate through the heat insulating material (5) formed by foaming and curing the heat insulating material A sixth step S6 of integrally binding P2 to form a complete door 1;

The upper and lower molds 40 and 10 are disassembled to constitute a seventh step of drawing out the door 1 in which molding is completed.

7 is a view showing another configuration of the present invention in the case of a door having a packing for the purpose of soundproofing, windproof insects, etc. in the rim to form a groove for inserting the packing in the rim inside the middle mold 20 The packing core piece (C) is applied to form the groove for inserting the packing, which is a simple commercial change structure, without departing from the spirit of the present invention.

Referring to the production method of the present invention having the above manufacturing step in more detail.

The first plate member P1 is accommodated in the space portion 21 of the intermediate mold 20 mounted on the lower mold 10 in a state of being precisely cut to meet the standard of the door 1 and space portion 21. When the core 30 is retracted, the core 30 generates a space portion through which the material does not penetrate when the hard thermosetting synthetic resin material is charged in the second step through the core 30, so that the insulation receiving space 2 ′ is provided.

Thereafter, the upper mold 40 is placed on the intermediate mold 20, and then heated to a predetermined temperature to harden the material for forming the rim 2, thereby being integrally coupled with the first plate member P1. When the upper mold 40, the core 30, and the intermediate mold 20 are demolded in the state, the first plate member P1 is attached to the bottom surface of the edge 2 on the lower mold 10, as shown in FIG. The semi-finished product remains.

In order to form a complete door by applying the heat insulating material 5 and the second plate P2 on the semi-finished product, a foamable heat insulating material is filled into the heat insulating material receiving space 2 'of the edge 2, and then the edge ( The first plate P1 is placed on the upper surface of 2) to close the inlet of the heat insulating material accommodation space 2 '.

In this state, when the upper mold 40 is set on the first plate P1 as shown in FIG. 5 and heated to a predetermined temperature, the heat insulating material foams and hardens to form the heat insulating material 5, and the heat insulating material 5 is a medium. As a result, the edge 2 and the second plate P2 are integrally bound to form the complete door 1 as shown in FIG. 6.

The present invention as described above is easy to manufacture and easy to handle through injection molding, easy to handle, and integrally formed a rim of a predetermined thickness on all sides of the door to protect the insulation to be foamed inside from the outside of the door Can improve the side aesthetics,

Locally thick parts on both sides of the rim allow the hinge and locking member to be applied to the door stably and firmly, and also prevent the corrosion of metal parts due to condensation and firm adhesion by foaming synthetic resin with excellent insulation effect. By making it firmly manufactured by to increase the reliability of the product.

Claims (2)

Before the door 1 in the space 21, the intermediate mold 20 having the rectangular space 21 having the same size as the size of the door 1 is placed on the lower mold 10, While mounting the first plate (P1) made of metal or hard synthetic resin constituting one of the back plate (3) (3 ') through the heat insulating material receiving space (2') and the recessed portion (31) (32) A first step S1 of setting the core 30 for forming the thick portion 4, 4 '; A second step (S2) of filling a hard thermosetting synthetic resin material for forming an edge (2) in a gap formed between the space portion (21) and the edge of the core (30); The upper mold 40 is set on the intermediate mold 20 where the second step S2 is completed, and then heated to a predetermined temperature to harden a material for forming an edge, thereby integrating with the first plate P1. A third step S3; In the state in which the third step S3 is completed, the upper mold 40, the core 10, and the middle mold 20 are demolded, and the first plate material P1 is attached to the bottom surface of the lower mold 10. (4) a fourth step (S4) to remain only; A fifth step (S5) of filling the foamable insulating material into the insulating material receiving space 2 'of the edge 2 and placing the first plate P1 on the upper surface of the edge 2 so that the insulating material is hermetically received. Wow; Set the upper mold 40 on the first plate (P1) of the fifth step (S5) and heated to a predetermined temperature and the edge (2) and the second plate through the heat insulating material (5) formed by foaming and curing the heat insulating material A sixth step S6 of integrally binding P2 to form a complete door 1; Method for manufacturing a synthetic resin door, characterized in that the upper and lower molds (40) (10) is separated by the seventh step of drawing out the door (1) after the molding is completed. A border (2) having a predetermined thickness formed of a rectangular frame shape so as to be provided with a heat insulating material receiving space (2 ') inside of a hard synthetic resin material; Front and back plates (3) (3 '), which are integrally attached to the front and rear surfaces with the edge (2) interposed therebetween and composed of a metal steel plate or a hard synthetic resin plate; Thick parts (4) and (4 ') for installing a connecting hinge and a locking member which are formed at both sides of the edge (2) and applied to the door; The insulating material accommodating space (2 ') is made of a hard synthetic resin material, characterized in that each of the foaming filled in the insulating material receiving space (2') comprises a heat insulating material (5) integrally formed with the edge (2). Border (2) of a predetermined thickness configured to have a rectangular frame shape to be provided; Front and back plates (3) (3 '), which are integrally attached to the front and rear surfaces with the edge (2) interposed therebetween and composed of a metal steel plate or a hard synthetic resin plate; Thick parts (4) and (4 ') for installing a connecting hinge and a locking member which are formed at both sides of the edge (2) and applied to the door; Synthetic resin door, characterized in that it comprises a heat insulating material (5) formed integrally with the rim (2) is filled with foam in the heat insulating material receiving space (2 ').