CN103407165B - A kind of manufacture method of ABS/PC duricrust casing - Google Patents

Abstract

The invention discloses a method for manufacturing an ABS/PC hard-shell box, which comprises the following steps: 1) through co-extrusion of an injection molding machine to obtain a composite plate with more than two layers; 2) at the head end of the co-extrusion die of the injection molding machine, Another PC film is attached to the surface of the PC sheet layer on the surface layer; 3) Cut the laminated composite sheet into pieces; 4) Heat the cut pieces of the composite sheet to obtain the ABS/PC hard shell box. Using the manufacturing method of the present invention, on the basis of the existing hard-shell box body formed by injection molding and co-extrusion of two layers of plastic materials, a layer of PC film is attached to the surface of the hard-shell box body, thereby increasing the rigidity of the hard-shell box body. Abrasion resistance of the surface. Because the PC coating is a flexible structure, it can also improve the impact resistance of the surface of the hard shell box, thereby achieving the purpose of prolonging the service life of the hard shell box.

Description

A kind of manufacturing method of ABS/PC hard shell box body

technical field

The invention relates to the field of cases and bags, in particular to a method for manufacturing an ABS/PC hard shell case.

Background technique

At present, the materials used in the suitcases on the market are generally nylon or plastic materials, including PP, ABS, PC and so on. Among them, suitcases made of nylon materials are collectively referred to as business suitcases, which are light in weight but easily damaged. In addition, suitcases made of plastic materials are collectively referred to as hard-shell boxes. Hard-shell boxes are generally formed in one piece and have good protection for the items in the box. However, the current hard shell box is generally formed by injection molding and co-extrusion of two layers of plastic materials. Although the hardness of the prepared hard shell box meets the user's requirements, the wear resistance and impact resistance are poor, resulting in a short service life of the box body.

Contents of the invention

In order to overcome the above disadvantages, the object of the present invention is to provide a method for manufacturing an ABS/PC hard shell box with strong wear resistance and impact resistance and long service life.

In order to achieve the above object, the present invention adopts the following technical solutions: a manufacturing method of an ABS/PC hard shell box, the manufacturing method comprising the following steps:

1) Injection-molded sheet: more than two layers of composite sheet are obtained by co-extrusion of an injection molding machine, one of which is an ABS sheet layer, and at least one PC sheet layer is a surface layer;

2) Bonding: At the head end of the co-extrusion die of the injection molding machine, another PC film is attached to the surface of the PC sheet layer, and then the bonded composite sheet is sent between the two extrusion rollers for extrusion bonding ;

3) Cutting: cutting the laminated composite sheet in step 2) into pieces according to the size of the luggage shell to obtain cut pieces of the composite sheet;

4) Heating forming: Preheat the cut piece of the composite plate obtained in step 3) to 40-60°C, then put the cut piece of the composite plate into the forming machine, and fix the four sides of the cut piece of the composite plate on the molding machine. In the lower mold cavity of the machine, cover the upper mold cavity, and then the lower mold is driven by the cylinder to move upward and push the cut piece to the upper mold. The upper mold and the lower mold cooperate to heat and shape the cut piece, and the cut piece is taken out to obtain the ABS/PC hard shell box.

In step 2) of the present invention, another PC film is attached to the surface of the composite sheet formed by the co-extrusion of the PC sheet layer and the ABS sheet layer at the head end of the co-extrusion die. Since the bonding position is close to the head end of the co-extrusion die, Therefore, the surface of the composite sheet formed by the co-extrusion of the PC sheet layer and the ABS sheet layer still retains a high co-extrusion temperature, so that another PC film and the composite sheet formed by the co-extrusion of the PC sheet layer and the ABS sheet layer The operation does not require additional heating, which simplifies the processing technology and improves the processing efficiency.

The present invention adopts the above manufacturing method, and attaches a layer of PC film on the surface of the traditional two-layer hard shell box, thereby increasing the wear resistance of the hard shell box surface. Because the PC coating is a flexible material, it can also improve the impact resistance of the surface of the hard shell box, thereby achieving the purpose of prolonging the service life of the hard shell box.

In the present invention, because the hardness of the ABS sheet layer is greater than that of the PC sheet layer on the surface, when the customer needs a hard shell box with a higher hardness, the thickness of the ABS sheet layer can be appropriately increased, and when the customer needs a hard shell box with a lower hardness , can appropriately reduce the thickness of the ABS sheet layer or increase the thickness of the surface PC sheet layer.

The composite board obtained by co-extruding the injection molding machine in the step 1) also includes another PC board layer as the bottom layer, thereby further improving the quality of the prepared hard-shell box.

The thermoforming operation in step 4) is as follows: the thermoforming operation in step 4) is: preheat the cut pieces of the composite sheet obtained in step 3) to 40-60°C, and then heat the composite sheet Put the cut pieces into the molding machine, fix the four sides of the cut pieces of the composite plate in the lower mold cavity of the molding machine, and then cover the upper mold cavity. The temperature of the lower mold is 40-60°C, and the temperature of the upper mold cavity is 430- 460°C, then place the upper mold above the cut piece, the lower mold is driven by the cylinder to move up and push the cut piece to the upper mold, the upper mold and the lower mold cooperate to make the cut piece hot-pressed; after the cut piece is formed, the lower mold resets , the upper mold is removed, and then the molded ABS/PC hard shell box is taken out. Through the above thermoforming process, the cutting pieces of the composite plate are processed into the ABS/PC hard shell box material of the present invention.

When the cut pieces are fixed on the forming machine, the lower mold is cooled by circulating water to 40-60°C.

By adopting the manufacturing method of the present invention, on the basis of the existing hard shell box body formed by co-extrusion of two layers of plastic materials, a layer of PC film is attached to the surface of the hard shell box body, thereby increasing the surface area of the hard shell box body. wear resistance. Because the PC coating is a flexible material, it can also improve the impact resistance of the surface of the hard shell box, thereby achieving the purpose of prolonging the service life of the hard shell box. At the same time, the PC film is directly attached to the co-extruded two or more layers of plastic materials that have just been co-extruded, using the co-extrusion residual temperature of the two or more layers of co-extruded plastic materials, no additional heating is required, and the processing technology is simple.

detailed description

Below in conjunction with specific embodiment the present invention is described in further detail:

A kind of manufacturing method of ABS/PC hard case of the present invention, described manufacturing method comprises the following steps:

1) Injection-molded sheet: more than two layers of composite sheet are obtained by co-extrusion of an injection molding machine, one of which is an ABS sheet layer, and at least one PC sheet layer is a surface layer;

2) Bonding: At the head end of the co-extrusion die of the injection molding machine, another PC film is attached to the surface of the PC sheet layer, and then the attached composite sheet is sent between the two extrusion rollers for extrusion bonding ;

3) Cutting: cutting the laminated composite sheet in step 2) into pieces according to the size of the luggage shell to obtain cut pieces of the composite sheet;

4) Heating forming: Preheat the cut piece of the composite plate obtained in step 3) to 40-60°C, then put the cut piece of the composite plate into the forming machine, and fix the four sides of the cut piece of the composite plate on the molding machine. In the lower mold cavity of the machine, cover the upper mold cavity, and then the lower mold is driven by the cylinder to move upward and push the cut piece to the upper mold. The upper mold and the lower mold cooperate to heat and shape the cut piece, and the cut piece is taken out to obtain the ABS/PC hard shell box.

Example 1

1) Injection-molded sheet: Two-layer composite sheet is obtained by co-extrusion of an injection molding machine, in which the lower layer is an ABS sheet layer, and the surface layer is a PC sheet layer;

2) Bonding: At the head end of the co-extrusion die of the injection molding machine, another PC film is attached to the surface of the PC sheet layer, and then the attached composite sheet is sent between the two extrusion rollers for extrusion bonding ;

3) Cutting: cutting the laminated composite sheet in step 2) into pieces according to the size of the luggage shell to obtain cut pieces of the composite sheet;

4) Heating forming: Preheat the cut pieces of the composite plate obtained in step 3) to 40-60°C, then put the cut pieces of the composite plate into the forming machine, and fix the four sides of the cut pieces of the composite plate on the forming machine In the lower mold cavity, cover the upper mold cavity, the lower mold is cooled to 40-60°C by circulating water, the temperature of the upper mold cavity is 430-460°C, and then the upper mold is placed on the cutting piece, driven by the cylinder The mold moves up and pushes the cutting piece to the upward mold, and the upper mold and the lower mold cooperate to make the cutting piece hot-pressed; after the cutting piece is formed, the lower mold is reset, the upper mold is removed, and then the formed ABS/PC hard case Body removed.

Among them, the thickness of the surface PC sheet layer and the lower ABS sheet layer in the ABS/PC hard shell box can be designed according to the needs of customers. When the customer needs a hard shell box with higher hardness, the thickness of the lower ABS sheet layer can be appropriately increased Thickness, when the customer needs a hard shell box with less hardness, the thickness of the lower ABS sheet layer can be appropriately reduced or the thickness of the surface PC sheet layer can be increased.

Example 2

1) Injection-molded sheet: A three-layer composite sheet is obtained through co-extrusion by an injection molding machine, in which the middle layer is an ABS sheet layer, the surface layer is a PC sheet layer, and the bottom layer is another PC sheet layer;

2) Bonding: At the head end of the co-extrusion die of the injection molding machine, another PC film is attached to the surface of the PC sheet layer on the surface layer, and then the attached composite sheet is sent between the two extrusion rollers for extrusion pressure fit;

3) Cutting: cutting the laminated composite sheet in step 2) into pieces according to the size of the luggage shell to obtain cut pieces of the composite sheet;

4) Heating forming: Preheat the cut pieces of the composite plate obtained in step 3) to 40-60°C, then put the cut pieces of the composite plate into the forming machine, and fix the four sides of the cut pieces of the composite plate on the forming machine In the lower mold cavity, cover the upper mold cavity, the lower mold is cooled to 40-60°C by circulating water, the temperature of the upper mold cavity is 430-460°C, and then the upper mold is placed on the cutting piece, driven by the cylinder The mold moves up and pushes the cutting piece to the upward mold, and the upper mold and the lower mold cooperate to make the cutting piece hot-pressed; after the cutting piece is formed, the lower mold is reset, the upper mold is removed, and then the formed ABS/PC hard case Body removed.

Among them, the thickness of the surface PC sheet layer, the middle ABS sheet layer and the bottom PC sheet layer of the ABS/PC hard shell box can be designed according to the customer's needs. When the customer needs a hard shell box with high hardness, it can be Appropriately increase the thickness of the middle ABS sheet layer; when the customer needs a hard shell box with low hardness, the thickness of the middle ABS sheet layer can be appropriately reduced, and it can also be done by increasing the thickness of the surface PC sheet layer or another PC sheet layer on the bottom. Adjustment.

Claims (2)

1. a manufacturing method of an ABS/PC hard shell casing, characterized in that: the manufacturing method may further comprise the steps: 1) Injection-molded sheet: more than two layers of composite sheet are obtained by co-extrusion of an injection molding machine, one of which is an ABS sheet layer, and at least one PC sheet layer is a surface layer; 2) Bonding: At the head end of the co-extrusion die of the injection molding machine, another PC film is attached to the surface of the PC sheet layer, and then the attached composite sheet is sent between the two extrusion rollers for extrusion bonding ; 3) Cutting: cutting the laminated composite sheet in step 2) into pieces according to the size of the luggage shell to obtain cut pieces of the composite sheet; 4) Heating forming: Preheat the cut pieces of the composite plate obtained in step 3) to 40-60°C, then put the cut pieces of the composite plate into the forming machine, and fix the four sides of the cut pieces of the composite plate on the forming machine The temperature of the lower mold is 40-60°C, the temperature of the upper mold cavity is 430-460°C, and then the upper mold is placed on the cutting piece, and the lower mold is driven by the cylinder to Move up and press the cut piece to the upward mold, the upper mold and the lower mold cooperate to make the cut piece hot-pressed; after the cut piece is formed, the lower mold is reset, the upper mold is removed, and then the formed ABS/PC hard shell box is taken out ; The composite board obtained by co-extruding the injection molding machine in the step 1) also includes another PC board layer as the bottom layer. 2. The manufacturing method of the plastic case shell according to claim 1, wherein when the cut pieces are fixed on the forming machine, the lower mold is cooled by circulating water to 40-60°C.