KR100856751B1 - The method for manufacturing and apparatus for catapulting and molding insert cloth - Google Patents

Abstract

According to the present invention, the fabric is fixed by vacuum and fixing pins, and after injection molding of the cloth insert, the product is cut by a hot wire provided in the upper mold to separate the upper and lower molds, and then the product is removed by a mill pin to precisely fix the cloth. The present invention relates to an economic injection molding method and a mold structure of cloth inserts by integrating a cutting process of a product.

Injection molding. Cloth insert vacuum injection. mold.

Description

The method for manufacturing and apparatus for catapulting and molding insert cloth}

1 is a detailed cross-sectional view of the cloth insert vacuum injection mold of the present invention;

Figure 2 is a detailed cross-sectional view of the cloth insert vacuum injection mold of the present invention

Figure 3 is a side cross-sectional view of the lower mold and the intermediate mold of the present invention combined

4 is a detailed cross-sectional view of the lower mold and the intermediate mold of the present invention combined;

Figure 5 is a side cross-sectional detail of the molded article taken out from the mold of the present invention

Figure 6 is a front cross-sectional view of the finished molded article taken out of the mold of the present invention

Figure 7 Detailed view of the upper mold bottom of the present invention

Figure 8 is a detailed view of the bottom mold of the present invention

<Description of the Drawings>

Upper mold (1), lower mold (2), upper mold inner 100, fixing pin 101, upper mold fixing part 103, vacuum suction port 110, vacuum suction tube 111, hot wire 150,

Lower mold inner 200, fixing pin groove 201, lower mold fixing part 203, lower upper sealing plate 205, lower lower sealing plate 206, hydraulic cylinder support 207, resin inlet 209, resin injection Nozzle 210, up and down hydraulic cylinder 240, mill pin 250, resin injection pipe 290

The present invention is one of the manufacturing apparatus for automobile interior materials, and the cloth insert vacuum injection molding method and mold for fixing the fabric by vacuum insert and at the same time by installing a hot wire inside the mold to injection molding and fusion cutting the injection molded product at the same time It's about structure.

In general, molded products manufactured by injection molding while inserting cloth are mainly used as interior materials for automobiles, such as door trims, fillers, trunk mats, package trims, and headliners.These are commonly used according to low-priced national cars, small cars, and medium and large luxury cars. The interior material may be said to be different in material and composition from each other.

In other words, it is possible to use interior materials that are injection-molded only with synthetic resin, or interior materials with a part of a soft cloth (skin material) attached to the surface of synthetic resin.Other models can be bonded to the entire surface of the substrate. It is also possible to use the trimmed together or to bond the high-quality cloth to the synthetic resin surface for better touch, and then wrap the edge of the cloth on the inner surface of the base material.

Looking at the general manufacturing method of the automotive interior materials, the method of attaching the cloth after the injection molding of the automotive interior material is a method of manually attaching to the exterior of the automotive interior material by adhesive, and after the first injection molding, the fabric is laminated on the molding surface Later, there is a method of injection molding again, and a method of manufacturing a vehicle interior material with fabric attached at the same time by embedding cloth, but in the first case, it is inexpensive by hand, and in the second case, the quality is good, but the inconvenience of having to injection mold twice In the third case, there are injection high and low pressure injection methods and high pressure injection methods. The low pressure injection method is low pressure when injecting the injection liquid, while high pressure is applied when forming the substrate by pressing a cloth into the mold by inserting a cloth into the mold. need.

This low pressure injection method has high productivity because the molding of automobile interior material and the adhesion of cloth are performed at the same time. However, when the skin surface of the cloth is fabric or non-woven fabric, the interior material that has many angled step parts in the product has a high-pressure press pressure. There is a problem that the injection liquid is soaked out on the surface of the cloth by the high pressure when pressed to the upper mold to solve this problem.

For example, Korean Patent Publication No. 1997-0009920 supplies a fabric skin material between two molding dies before molding, and fixes the edges of the fabric skin material, and then on one side of the fabric skin material. The manufacturing method of the automotive interior part which comprises the process of supplying the resin material of the heat-melting state to the formed cavity, and completely closing the two molding dies, and compressing and cooling and solidifying the resin material and the fabric skin material integrally. It is,

Korean Patent Laid-Open Publication No. 2003-0004885 discloses a step of spraying water on the surface of the skin material before the skin material input step, and then inserts the skin material and presses the bonding process and the cooling process while blocking moisture by the injection heat. High pressure injection molding method is described,

Korean Patent Laid-Open Publication No. 2001-0073714 discloses an upper and lower mold having a forming surface limited to a size capable of forming a flat portion of a substrate, and an auxiliary mold for forming a side edge of the substrate on the upper mold. It describes a molding method of a car interior material and its molding apparatus which are operated in the state of the injection molding process and the bonding process of the skin material in the state that the gap is corrected.

Japanese Patent Laid-Open Publication No. 2001-0104019 discloses a lower mold having a recessed portion formed on a molding surface for forming a rib having a predetermined thickness from a base bottom, and a pair of first upper molds separated by a boundary between the positions of the recessed portions of the lower mold. And a second rod mold and an insert rod for forming a rim insertion groove of the skin material on the rib part while being operatively protruded by a cylinder in the molding surface between the first and second molds, and inserting the skin material into the insertion groove. Bonding device and joining method of the base material for automobile interior and the skin material composed of the cylinder itself for elevating the insert rod and the cylinder for elevating the first upper mold separately from the second upper mold,

Republic of Korea Patent Publication No. 0164016 is a decorative pattern sheet is sandwiched between a pair of molding molds with holes formed and a molding mold formed with an injection hole facing each other, the decorative pattern sheet is heated and softened by a heating apparatus, and decorated The pattern sheet is brought into tight contact with the cavity surface of the mold based on the pressure difference generated by the exhaust of the mold through the hole, and the molten resin is molded through the inlet to form a patterned product on the basis of the decorative pattern sheet. A heating apparatus is provided for use in a method for simultaneously patterning injection molding into a mold, wherein the heating apparatus heats and softens the decorative pattern sheet to supply heat to the decorative pattern sheet. The heating position facing the decorative pattern sheet, and the heating element is At the same time as the injection molding consisting of heating body moving means for moving the heating body in a positional relationship in which the heating surfaces of the heating elements are not parallel to each other between the heating position and the non-intense position between non-intensity positions which are moved away from the space. An apparatus and method for forming a pattern are described,

Publication No. 10-0226301 discloses a step of supplying a skin material between a pair of molds, between a skin material holding frame movable in a direction perpendicular to the mold closing direction and a skin support frame moving in the mold closing direction. Maintaining the skin material, supplying a predetermined thermoplastic melt, and closing the mold to form a multilayer molded article, wherein at least one movable member movable forward and backward in the mold closing direction is formed on the mold surface. After the supply of the resin melt is retracted in the mold blocking direction and at least one ejector is ejected on the skin material holding frame to fold the edge of the skin material toward the center of the mold, the movable member to the mold surface Although a method for producing a multilayer molded article is described in which the edge of the skin material is folded and molded to the rear of the resin body,

Conventional techniques as described above are complicated in the process, it is difficult to adhere the cloth to a certain shape of the synthetic resin fabric produced by a conventional injection method, and even if the wrinkles in the skin layer of the fabric formed on the surface of the synthetic resin It is formed, or the embossing is generated, the quality is reduced, it is difficult to make the thickness of the resin layer even during the pressing process, the fabric is easily detached after a certain time, there is a problem that must go through the process of cutting the edge of the product after molding come.

The present invention is to solve the above problems, the patent application Nos. 10-2003-14011 and 10-2003-73301, 10-2005-19077, the applicant filed before the injection of the invention As an improvement of the molding method and the apparatus,

The cloth is fixed with vacuum and fixing pins, and after injection molding of the cloth insert, the product is cut with a hot wire provided in the upper mold, the upper and lower molds are separated, and the product is removed and removed with a mill pin. It is a technical object of the present invention to provide an economical cloth insert vacuum injection molding method and a mold structure by integrating a cutting process.

In order to achieve the above object, the present invention comprises an upper mold (1) and a fixed lower mold (2) corresponding to the upper mold (1) to be advanced back and forth,

The upper mold (1) is provided on the upper mold support 103 formed on the upper side, the upper mold inner portion 100 formed in the lower center of the upper mold support 103, and one side of the upper mold support (103) Two heaters 180 and the upper mold support 103 is formed spaced apart a predetermined interval, a plurality of fixing pins 101 is fixed to the cloth and provided with a spring on the back, and one side of the upper mold support 103 A vacuum suction port 110 formed in the vacuum suction port 110 connected to an external vacuum pump, connected to the vacuum suction port 110 and penetrated to the upper mold inner 100, and the upper mold inner 100. Is connected to the two heaters 180 provided on one side of the upper mold support 103 and consists of a heating wire 150 installed in the shape of a product,

The lower mold 2 is located above the lower mold fixing part 203,

The lower mold fixing part 203 is fixedly installed on the upper part of the lower mold inner part 200 and the lower mold inner part 200 formed on the upper part of the lower mold fixing part 203 is formed to penetrate the resin into the mold The resin injection hole 209 and the resin injection nozzle 210 are formed to be spaced apart from each other at a lower portion of the lower mold inner portion 200 to penetrate through the inner upper portion of the lower mold inner portion 200 to be molded. Is formed on the left and right sides of the plurality of mil pins 250 and push the product upwards and the lower mold fixing portion 203,

A lower upper plate 205 formed at a lower portion of the plurality of mill pins 250 to fix the lower upper plate 205, a lower lower plate 206 formed at a lower portion of the lower upper plate 205, and the lower mold fixing portion 203. It is formed on the left and right and up and down hydraulic cylinder 240 to move the upper and lower sealing plates 205 and 206 supporting the mill pin 250 up and down, and is formed in the lower portion of the upper and lower hydraulic cylinder 240, vertical hydraulic cylinder 240 A hydraulic cylinder support 207 for fixing the resin, a resin injection nozzle 210 installed at the center of the lower mold fixing part 203 for injecting resin into the lower mold interior 200, and the resin nozzle 210. The mold is composed of a resin inlet 209 for injecting a resin into the resin nozzle 210 and the bottom insert of the present invention relates to a cloth insert vacuum injection molding method and a mold structure.

The coating of the cloth on the curved part of the side of the injection-molded article of the present invention is introduced into the upper mold (1) so that the cloth is fixed to the upper mold (1) using a conventional cloth guide Robert (not shown) formed on one side After entering into the upper mold inner 100 and fixed with the fixing pin 101, an external vacuum pump (not shown) is operated to absorb the cloth into the upper mold inner 100 and at the same time the upper mold 1 After operating the moving hydraulic press (not shown) to advance the upper mold (1) toward the lower mold (2) and coalesce, the resin inlet 209, the resin injection pipe 290 and the resin nozzle 210 of the lower mold (2) After injection molding through (), (the resin injection port 209 and the resin injection pipe 290 and the resin nozzle 210 may be provided with a separate heater to adjust the viscosity of the resin)

After cutting the product with the heating wire installed inside the upper mold, the upper mold is reversed, the upper and lower molds are detached, and then the product is detached with the lower mold's milpin.

At this time, the surface of the injection-molded article formed with projections such as embossing may be uniformly adhered (coated) to the surface of the injection-molded article. .

Hereinafter, the present invention will be described in detail through examples.

Example

1st process (cloth insert process)

1 and 2, in the state in which the upper and lower molds (1, 2) are spaced apart, through the cloth guide Robert (not shown) in the inner lower portion of the upper mold (2) formed on the upper of the lower mold (2) After the cloth is introduced into the upper mold inner 100 of the upper mold 1 and fixed with the fixing pin 101,

After operating the moving hydraulic press (not shown) to close the upper mold (1) to the lower mold (2), and then reverse the upper mold (1) spaced about 10mm,

By operating an external vacuum pump (not shown) to the vacuum suction port 110 of the upper mold support 103, the vacuum suction port 110 is connected to the vacuum suction port 110 and formed through the upper mold inner 100 through the vacuum suction pipe 111 By adsorbing the cloth into the upper mold interior 100 by the same time, as shown in Figures 3 and 4, by operating the moving hydraulic (not shown) of the upper mold (1) to advance the upper mold (1) toward the lower mold (2). Then coalesce,

2nd process (resin injection and molding process)

Resin is injected into the space between the upper mold inner part 100 and the lower mold inner part 200 through the resin inlet 209, the resin inlet tube 290, and the resin nozzle 210 of the lower mold 2. When the amount of resin injection set by the controller (not shown) installed outside the mold is injected and is equal to or greater than a predetermined time or a predetermined pressure (set), it is installed inside the upper mold 1 and is heated in the heat of the heating wire connected to the heater 180. Heat-cut the edge of the molded product by

3rd process (demolition process)

5 and 6, when the moving oil pressure (not shown) of the upper mold 100 is reversed to reverse the upper mold (1), the molded product cut in the lower mold 200 remains At this time, when the two upper and lower hydraulic cylinders 240 formed on the left and right sides of the lower mold inner 200 are raised, the lower upper and lower pressure plates 205 and the lower lower and lower plates 206 connected to the upper and lower hydraulic cylinders 240 are raised together. The plurality of mill pins 250 fixed to the upper portion of the lower upper plate 205 are raised to the lower part of the molded product through the lower mold inner part 200 and push the molded product to remove the molded product to insert a plurality of transitions. After the injection molded article is manufactured, the process returns to the first step and the vacuum injection molded article is repeatedly inserted into the fabric.

By installing a plurality of molds as described above, several products can be injection molded at the same time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a detailed cross-sectional view of the cloth insert vacuum injection mold in the open state of the present invention, FIG. 2 is a detailed cross-sectional view of the cloth insert vacuum injection mold in the open state of the present invention, and FIG. 3 is combined with a lower mold and an intermediate mold of the present invention. 4 is a cross-sectional detail view of the lower mold and the intermediate mold of the present invention, FIG. 5 is a side cross-sectional detail drawing of the molded article completed in the mold of the present invention, and FIG. 6 is completed in the mold of the present invention. Fig. 7 is a detailed cross-sectional detail view of a molded article, Fig. 7 shows a bottom detailed view of the upper mold of the present invention, and Fig. 8 shows a detailed plan of the lower mold of the present invention. 100, the fixing pin 101, the upper mold fixing part 103, the vacuum suction port 110, the vacuum suction pipe 111, the heating wire 150, the heater 180, the lower mold inner 200, the fixing pin groove 201 ), Lower mold fixing part 203, lower upper sealing plate 205, lower lower sealing plate 206, hydraulic cylinder support 207, resin inlet 209, water It can be seen that the holding mouth nozzle 210, the up and down hydraulic cylinder 240, the mill pin 250, the resin injection pipe 290.

Looking at the structure, as shown in Figures 1 and 2, the present invention is located on one side (lower) of the upper mold (1) and the upper mold (1) is moved forward and backward, corresponding to the upper mold (1) Fixed lower mold (2), and one side of the upper mold (1) is composed of a conventional cloth guide Robert (not shown) formed so that the cloth is fixed to the upper inside of the upper mold (2),

The upper mold (1) is provided on the upper mold support 103 formed on the upper side, the upper mold inner portion 100 formed in the lower center of the upper mold support 103, and one side of the upper mold support (103) Two heaters 180 and the upper mold support 103 is formed at regular intervals apart, a plurality of fixing pins 101 are fixed to the cloth and provided with a spring on the back, and one side of the upper mold support 103 A vacuum suction port 110 formed in the vacuum suction port 110 connected to an external vacuum pump, connected to the vacuum suction port 110 and penetrated to the upper mold inner 100, and the upper mold inner 100. Is connected to the two heaters 180 provided on one side of the upper mold support 103 and consists of a heating wire 150 installed in a product shape,

The lower mold 2 is located above the lower mold fixing part 203,

The lower mold fixing part 203 is fixedly installed on the upper lower mold 200 and the lower mold support 203 is formed to be spaced apart at regular intervals, and corresponds to the fixing pin 101 provided in the upper mold support 103 A plurality of fixing pin groove 201,

A resin inlet 209 and a resin injection nozzle 210 formed through one side of the lower mold inner part 200 formed on the lower mold fixing part 203 to inject resin into the mold, and the lower mold inner part. A plurality of mil pins 250 formed to be spaced apart at a predetermined interval from the lower part 200 and pushed upwards and downwards through the inner upper portion of the lower mold inner part 200 after molding and pushed out to the upper part of the lower mold, and the lower mold height Formed on the left and right sides of the government unit 203,

A lower upper plate 205 formed at a lower portion of the plurality of mill pins 250 to fix the lower upper plate 205, a lower lower plate 206 formed at a lower portion of the lower upper plate 205, and the lower mold fixing portion 203. It is formed on the left and right and up and down hydraulic cylinder 240 to move the upper and lower sealing plates 205 and 206 supporting the mill pin 250 up and down, and is formed in the lower portion of the upper and lower hydraulic cylinder 240, vertical hydraulic cylinder 240 A hydraulic cylinder support 207 for fixing the resin, a resin injection nozzle 210 installed at the center of the lower mold fixing part 203 for injecting resin into the lower mold interior 200, and the resin nozzle 210. ) Is a cloth insert vacuum injection mold structure composed of a resin injection hole 209 connected to the resin injection pipe 290 to inject resin.

In addition, the inner side of the lower mold (2) can be used to form a conventional cooling device (not shown) for protecting the resin inlet 209 and the resin injection nozzle 210 from the heat generated during resin injection, which It can selectively form and use according to resin injection amount.

In the present invention as described above, after fixing the cloth by vacuum, injection molding, and then fusion cutting with a hot wire installed in the mold to produce an injection-molded article, and does not perform a separate cutting process to reduce the manufacturing time and equipment cost savings Not only that, there is an effect that can be made of high-quality molded products.

Claims (2)

In the vacuum injection molding method in which the cloth is inserted, 1st process (cloth insert process) With the upper and lower molds 1 and 2 spaced apart from each other, the upper part of the upper mold 1 is formed by a cloth guide Robert (not shown) on the inner lower part of the upper mold 2 formed on the upper part of the lower mold 2. After flowing into the mold 100 and fixed with the fixing pin 101, After operating the moving hydraulic press (not shown) to close the upper mold (1) to the lower mold (2), and then reverse the upper mold (1) by 10mm apart, By operating an external vacuum pump (not shown) to the vacuum suction port 110 of the upper mold support 103, the vacuum suction port 110 is connected to the vacuum suction port 110 and formed through the upper mold inner 100 through the vacuum suction pipe 111 By adsorbing the cloth into the upper mold inner 100 by the same time, by operating the moving hydraulic (not shown) of the upper mold (1) by advancing the upper mold (1) toward the lower mold (2), 2nd process (resin injection and molding process) Resin is injected into the space between the upper mold inner part 100 and the lower mold inner part 200 through the resin inlet 209, the resin inlet tube 290, and the resin nozzle 210 of the lower mold 2. When the amount of resin injection set by the controller (not shown) installed outside the mold is injected and is equal to or greater than a predetermined time or a predetermined pressure (set), it is installed inside the upper mold 1 and is heated in the heat of the heating wire connected to the heater 180. Heat-cut the edge of the molded product by 3rd process (demolition process) When the hydraulic press (not shown) of the upper mold 100 is operated in reverse, the upper mold 1 is reversed, and the product is formed and cut in the lower mold inner 200, and the lower mold inner 200 Raising the two upper and lower hydraulic cylinders 240 formed on the left and right sides of the upper and lower hydraulic plates 205 and the lower lower and lower plates 206 connected to the upper and lower hydraulic cylinders 240 together, the lower upper and lower plates 205 The plurality of mill pins 250 fixed to the upper portion of the lower mold 200 through the lower portion of the molded product is raised to push the molded product to remove the molded product to manufacture a multi-insert injection molded article is inserted into A vacuum injection molding method in which a cloth is inserted, characterized in that the process is returned to one step and repeatedly manufactured. The upper mold (1) to be moved forward and backward, located on one side (lower) of the upper mold (1), the fixed lower mold (2) corresponding to the upper mold (1), and the upper side on one side of the upper mold (1) In the cloth insert vacuum injection mold structure provided with a conventional cloth guide Robert (not shown) formed so that the cloth is fixed to the upper inside of the mold (2), The upper mold (1) is provided on the upper mold support 103 formed on the upper side, the upper mold inner portion 100 formed in the lower center of the upper mold support 103, and one side of the upper mold support (103) Two heaters 180 and the upper mold support 103 is formed at regular intervals apart, a plurality of fixing pins 101 are fixed to the cloth and provided with a spring on the back, and one side of the upper mold support 103 A vacuum suction port 110 formed in the vacuum suction port 110 connected to an external vacuum pump, connected to the vacuum suction port 110 and penetrated to the upper mold inner 100, and the upper mold inner 100. Is connected to the two heaters 180 provided on one side of the upper mold support 103 and consists of a heating wire 150 installed in the shape of a product, The lower mold (2) is located at the upper portion of the lower mold fixing portion (203), the lower mold inner portion 200 is fixedly installed on the upper lower mold fixing portion (203), and the predetermined distance apart from the lower mold support (203) is formed, a plurality of fixed corresponding to the fixing pins 101 provided on the upper mold support 103 pin groove 201 and the lower mold after molding is spaced apart a predetermined interval on the lower surface of the lower mold interior 200 It is formed on the left and right sides of the lower mold fixing part 203 and the plurality of mil pin 250 for pushing out the molded product formed through the inner upper portion of the inside 200 , the lower portion of the mil pin 250 A lower upper plate 205 to be formed and fixed, a lower lower plate 206 formed on the lower side of the lower upper plate 205, and left and right sides of the lower mold fixing part 203, and the mill pin 250. Vertical hydraulic cylinder for vertically moving the upper and lower sealing plates (205, 206) to support the And a hydraulic cylinder support 207 formed at a lower portion of the upper and lower hydraulic cylinders 240 to fix the upper and lower hydraulic cylinders 240, and installed at a central portion of the lower mold fixing portion 203 to lower the resin. It comprises a resin injection nozzle 210 for injecting the inside of the mold 200 and a resin inlet 209 connected to the resin nozzle 210 by a resin injection pipe 290 to inject resin. The cloth insert vacuum injection mold structure, characterized in that.

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