DE102009025366A1 - Long fiber reinforced thermoplastic material profile preparing method for automobile i.e. car, involves manufacturing thermoplastic resin through extruder, where resin is selected from group consisting of polyolefin and polyamide - Google Patents

Abstract

The method involves manufacturing a thermoplastic resin through an extruder, where the thermoplastic resin is selected from a group consisting of polyolefin, polyamide, acrylonitrile butadiene styrene (ABS) and polyethylene terephthalate, and fiber is selected from a group consisting of glass fiber, basalt textile, carbon fiber and an aramid fiber. Outer circumference of a bottom roll (202) and a top roll (201) is designed to be in a shape of a profile section (401). A plastic sheet is laminated on top and lower parts of an extruded product. An independent claim is also included for a long fiber reinforced thermoplastic profile preparing device.

Description

CROSS-REFERENCE (E) TO RELATED APPLICATIONS

The present invention claims the priority of Korean Patent Application No. 10-2008-0057647 filed on Jun. 19, 2008 and incorporated herein by reference.

BACKGROUND OF THE INVENTION

Field of the invention

The The present invention relates to a method for producing a long fiber reinforced thermoplastic profile and a device for this; and more particularly, a method of manufacturing a long fiber reinforced thermoplastic profile using an LFT-D (long fiber reinforced thermoplastic direct compounding) process and a roll forming process combined and economical and sequential the long fiber reinforced thermoplastic profile with less deterioration and a device for it.

Description of the state of the technology

One Profile is used for building constructions and vehicles and by extruding steel, aluminum or a plastic compound or produced by roll forming the same.

at the roll forming process is a continuously supplied Leaf material gradually in a circular cross-sectional shape brought by passing through roller stands which are arranged continuously so that the profile is made or both ends are welded to one Manufacture tube.

typically, For example, the rolls used in the roll forming process have a convex roll and a concave roller through which a pressing part and a non-pressing part are optionally arranged so that the sheet material gradually is brought into a desired shape by passing through the Roller pairs is performed. The rollers can be restrictive to be used when working with metals.

One Long fiber reinforced thermoplastic (hereinafter referred to as "LFT") is used for vehicle components, such as an impact beam and a leaf frame that is thin and light in weight and having excellent strength characteristics. The LFT is manufactured by an LFT-D process.

First For example, the LFT is made to have a leaf shape. Of the leaf-shaped LFT is heated in an oven, with a reinforcing sheet coated and then by a High-pressure molding device in the impact beam and shaped like that. However, there is a problem that the physical properties during heating be deteriorated in the oven.

SUMMARY OF THE INVENTION

A Embodiment of the present invention is directed to a method for producing an LFT profile, the LFT-D method and a roll forming process so combined that it is economical and consecutive the long fiber reinforced thermoplastic profile with less deterioration and to provide a device therefor.

Around to achieve the object of the present invention, the present invention The invention relates to a method for producing an LFT (long fiber reinforced thermoplastic) profile ready to use the LFT profile sequentially by using a roll forming roll and an LFT-D (long fiber reinforced thermoplastic direct compounding) extruder, comprising a first extruder and a second extruder and includes: a) preparing a thermoplastic resin compound by melting and kneading a thermoplastic resin and a Additive in the first extruder; b) producing an LFT Kneading the prepared thermoplastic resin compound and continuous fibers or staple fibers in the second extruder; c) producing an extruded LFT product of a desired size and mold by continuously extruding the LFT using an extrusion mold; and d) producing a profile with a desired size and shape by passing of the extruded LFT product through the roll forming roll and subsequent cutting the same using a cutting part.

BRIEF DESCRIPTION OF THE DRAWINGS

1 FIG. 10 is a schematic diagram showing a device for manufacturing an LFT profile according to an embodiment of the present invention and the manufactured profile in cross section. FIG.

2 FIG. 12 is a schematic diagram showing roll forming rolls according to an embodiment of the present invention and the formed profile in cross section. FIG.

100

LFT-D extruder

101

thermoplastic Resin and additive

102

first extruder

103

continuous fiber

104

second extruder

105

extrusion die

200

Rolling molding

201

upper roller

202

lower roller

203

Press room

300

cutting part

400

profile

401

Profile 1

DESCRIPTION SPECIFIC EMBODIMENTS

The Advantages, features and aspects of the invention will become apparent from the following Description of the embodiments with reference to the attached drawings, which will be explained below.

According to the The present invention provides a method for producing a LFT (long fiber reinforced Thermoplastic) profile providing the LFT profile sequentially by using a roll forming roll and an LFT-D (long fiber reinforced thermoplastic direct compounding) extruder, comprising a first extruder and a second extruder and includes: a) preparing a thermoplastic resin compound by melting and kneading a thermoplastic resin and a Additive in the first extruder; b) producing an LFT Kneading of the produced thermoplastic resin compound and of Continuous fibers or staple fibers in the second extruder; c) manufacture an extruded LFT product with a desired Size and shape by continuous extrusion the LFT using an extrusion die; and d) manufacturing a profile with a desired size and mold by passing the extruded LFT product through the roll forming roll and then cutting it using a cutting part.

Of the LFT-D extruder includes the first and second extruders. Provided it is possible the thermoplastic resin and the additive to melt and knead and then to the second extruder to convict, the first extruder is not special limited. And if it is possible, the thermoplastic resin compound and the continuous fibers or staple fibers To knead, the second extruder is not particularly limited.

Of the first and second extruders are according to their Functions separated. Preferably, each extruder is provided several times. However, only one extruder can be used, which includes all functions.

The Thermoplastic resin can be one or more of a group of Polyolefin, polyamide, ABS resin, polyethylene terephthalate and the like. Preferably, the thermoplastic resin is polyolefin.

Of the Additive may be one or more of a group of an antioxidant, a heat stabilizer, a pigment, a dispersant, a compatibilizer and the like.

The Continuous fiber or staple fiber can be one or more of a group a glass fiber, a basalt fiber, a carbon fiber, a Aramid fiber and the like. Preferably, the continuous fiber or staple fiber made of a fiberglass by a surface treatment is processed for polyolefin.

Preferably For example, the extrusion die has a cross-sectional shape and a size on, similar to or identical to a cross-sectional shape and a size of a profile to be produced are.

The Roll forming roll consists of an upper roll, a lower roll and a press room (a space between the upper and lower rollers). The upper and lower rollers form a pair that together turn, and outer surfaces of the Upper and lower rollers are designed so that the baling chamber has a cross-sectional shape similar to or identical with that of a profile to be produced.

If the upper and lower rollers are turned, the outer ones Surfaces of the upper and lower rolls and the pressing space are not changed.

It It is preferable that three or more roll forming rolls are provided and each temperature thereof gradually from the extruder is lowered. For example, in the case of three roll forming rolls the temperature of the roll forming rolls in turn from the next lying about 200 ° C to the extruder, 150 ° C and 100 ° C.

The plurality of roll forming rolls may be designed so that all the pressing spaces thereof have the same cross-sectional shape as a profile to be produced or have different cross-sectional shapes which are gradually smaller, so that the pressing space of the last roll forming roll has the same cross-sectional shape as the profile to be produced.

The upper and lower rollers and the pressing space can according to the Shape and size of the profile to be produced differently be designed.

Optional may be a drawing unit (for pulling the extruded product at a constant speed) at one end of the rolled molding be arranged. In this case causes a faulty Percentage is reduced.

One Plastic sheet can optionally on an upper before the roll forming process and a bottom surface of the extruded LFT product layered and then the extruded LFT product is through treats the roll forming.

The Profile can as a construction profile, a complex rectangular material or a vehicle crash beam and the like become.

A Device for producing the LFT profile according to present invention includes a LFT-D extruder with a first and a second extruder, a roll forming roll and a Cutting part, which are arranged in order so that they are consecutive create the LFT profile.

Of the first and second extruders are according to their Functions separated. Preferably, each extruder is provided several times. However, only one extruder can be used, which includes all functions.

1 FIG. 10 is a schematic diagram showing a device for manufacturing an LFT profile according to an embodiment of the present invention and the manufactured profile in cross section. FIG.

The like in 1 The apparatus for producing the LFT profile shown includes an LFT-D extruder 100 , a rolled part 200 and a cutting part 300 , The LFT-D extruder 100 includes a first extruder 102 and a second extruder 104 and the rolled molding 200 includes an upper roller 201 , a lower roller 202 and a press room 203 ,

The first extruder 102 is provided with a single screw, so a thermoplastic resin and an additive 101 to melt and knead and then to the second extruder 104 to convict.

Provided a processing temperature and RPM (revolutions per minute) Melting and kneading are the same as those that are typical for the thermoplastic resin used and the one used Additive are used, these are not particularly limited. Preferably, these are within such a value range, that is a deterioration of the thermoplastic resin compound minimized and the kneading is carried out uniformly.

The second extruder 104 is equipped with a twin screw so as to feed a continuous fiber 103 and those from the first extruder 104 kneading introduced thermoplastic resin compound and then continuously extruding an LFT product having a desired size and shape by extruding the LFT by using an extrusion die 105 manufacture.

The endless fiber 103 is cut in the kneading process into a long fiber of a desired size so that it passes through the extrusion die 105 extruded product with sufficient strength, and the long fiber is subjected to high shear stress in the extruder.

The extruded product 106 has a cross-sectional shape, an outer shape and a size that are similar to an end profile to be produced. However, since the extruded product 106 is widened by the spring force of the long fiber, it does not have the same as the final profile.

The extruded product 106 is in the rolled part 200 introduced, the three roll forming rolls, each from the upper roll 201 , the bottom roller 202 and the press room 203 exist, and through the upper and lower rollers 201 and 202 pressed while being cooled slowly, thereby having the same cross-sectional shape, the same outer shape and the same size as the end profile, and then through the cutting part 300 cut into a desired length, creating a continuous profile 400 produced according to the present invention.

2 FIG. 12 is a schematic diagram showing roll forming rolls according to an embodiment of the present invention and the formed profile in cross section. FIG.

The roll forming roll consists of the upper roll 201 , the bottom roller 202 and the press room 203 , The product extruded through the LFT-D extruder 106 is so in the press room 203 Introduced it through the top and bottom rollers 201 and 202 is pressed, making it the same cross-sectional shape, the same outer shape and the same size as the baling chamber 203 and then through the cutting part 300 cut into a desired length, whereby a final profile-1 401 ge is prepared according to the present invention.

According to the Present invention, it is possible to provide a method for Producing a long fiber reinforced thermoplastic profile, which combines an LFT-D process and a roll forming process and sparingly and sequentially the long fiber reinforced Produces thermoplastic profile with less deterioration, and a Provide device for it.

While the present invention with reference to the specific embodiments will be apparent to those skilled in the art that various changes and modifications can be made without departing from the Spirit and scope of the invention as set forth in the following claims is defined to depart.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - KR 10-2008-0057647 [0001]

Claims (11)

Method for producing an LFT (long fiber reinforced Thermoplastic) profile, which successively the LFT profile by using a roll forming roll and an LFT-D (long fiber reinforced thermoplastic direct compounding) extruder, comprising a first extruder and a second extruder and includes: a) Preparation of a thermoplastic resin compound by melting and kneading a thermoplastic resin and a Additive in the first extruder; b) making an LFT by kneading the prepared thermoplastic resin compound and continuous fibers or staple fibers in the second extruder; c) Producing an extruded LFT product with a desired one Size and shape by continuous extrusion the LFT using an extrusion die; and d) manufacture a profile with a desired size and mold by passing the extruded LFT product through the roll forming roll and then cutting it using a cutting part. The method of claim 1, wherein the thermoplastic Resin one or more of a group consisting of polyolefin, Polyamide, ABS resin and polyethylene terephthalate. The method of claim 1, wherein the additive one or more of a group consisting of an antioxidant, a heat stabilizer, a dispersant, a compatibilizer and a pigment. The method of claim 1, wherein the fiber is a or more of a group consisting of glass fiber, basalt fiber, Carbon fiber and aramid fiber is. The method of claim 1, wherein the extrusion die has a cross-sectional shape with that of the manufactured profile is identical. The method of claim 1, wherein the upper and the lower roll of the roll forming roll are arranged so that they facing each other and turned together, and outer Surfaces of the upper and lower rollers are designed in this way are that a pressing space between the upper and the lower roller has the same cross-sectional shape as the profile produced. The method of claim 1, wherein the roll forming roll is provided in at least three sentences. The method of claim 7, wherein each temperature the roll forming rolls from the extruder gradually becomes lower. The method of claim 1, wherein an upper and a lower surface of the extruded article prepared in d) Produce be coated with a plastic sheet and then the extruded product with the plastic sheet through the roll forming roll is passed. The method of claim 1, wherein the profile is a Construction profile, a complex rectangular material or a vehicle impact beam is. Apparatus for producing an LFT (long fiber reinforced Thermoplastic) profile comprising an LFT-D (long fiber reinforced thermoplastic direct compounding) extruder with a first extruder and a second extruder, a roll forming roll and a cutting part, which are arranged in order so that they sequentially produce the LFT profile.