JPH0457407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for preventing scratches and stains on extruded materials, which prevents scratches and dirt from adhering to required surfaces of extruded materials.

Prior Art and its Problems Immediately after extrusion molding, an extruded material is exposed from its front end to, for example, a roller table equipped with a plurality of rotatable free rollers and a slat connected thereto.
The material is placed on a conveyor such as a conveyor and sent forward, and once transferred onto a cooling table, it is further transported to a predetermined processing position for the next processing. Therefore, contact scratches or stains may occur on the extruded material during transportation by the above-mentioned transportation device, transfer to the cooling table, transfer from the cooling table to the next processing position, etc. . As a result, not only does the appearance of the extruded material deteriorate, but when this product is used in special equipment, the performance of the equipment may also be degraded. For example, when an extruded aluminum material is used while looking into the vacuum section of a vacuum device, if the surface that looks into the vacuum section has scratches or dirt, it may cause a decrease in the degree of vacuum inside the vacuum section. becomes. In order to prevent the above-mentioned scratches and stains, conventional methods have been to wrap carbon fiber around the rollers of roller tables, use carbon or Bakelite slats for slat conveyors, and use the cooling table moldings. The surface of the support part is covered with a carbon plate or Bakelite plate to prevent contact scratches or dirt from forming on the required surfaces of the mold material. However, preventing scratches and stains on the mold material using the above-mentioned method has the problem of high costs, and it has not been possible to completely prevent contact scratches and stains. Therefore, in order to prevent scratches and dirt from contacting the extruded material with the conveying device, etc., the extruded material is supported in a floating state so that the required surface of the same material does not come into contact with the conveying device during transportation. integrally extruding the prevention member from one extrusion opening including portions corresponding to both;
After extrusion molding, post-treatments such as cutting and heat treatment were performed before the above-mentioned prevention member was separated. In order to separate the prevention member from the mold material, a thin part is formed between the mold body and the scratch/stain prevention member during extrusion molding, and the prevention member is broken off or cut at this thin part. They were separated by However, in order to form a thin-walled portion during extrusion molding, it is necessary to complicate the shape of the extrusion opening of the die, which poses a problem in that the die manufacturing operation becomes difficult. Moreover, the overall shape of the molded material extruded from one extrusion opening becomes complicated, making it difficult to manufacture the molded material. Further, since there is an upper limit to the nature of extrusion molding in reducing the thickness of the thin portion, it has not been possible to easily remove the scratch/stain preventing member from the mold material.

An object of the present invention is to provide a method for preventing scratches and stains on an extruded material that solves the above problems.

In this specification, the term "aluminum" includes all aluminum alloys in addition to pure aluminum. Furthermore, in this specification, front and rear refer to FIG. 1, and the front refers to the left side in FIG. 1, and the rear refers to the opposite side. In addition, left and right refer to the front.

Means for Solving the Problems The method for preventing scratches and stains on extruded molded materials according to the present invention includes arranging a coiled molded material protection sheet between an extrusion die and a conveying device so as to be fed out forward; This method is characterized in that the sheet end is hooked to the front end of the molding material extruded from the extrusion opening of the die, and the sheet is fed out by advancing the molding material to cover a desired surface of the molding material with the sheet.

In the above, the conveying device is a roller on which the molding material extruded from the extrusion opening is first placed.
It is generally comprised of a table, a slat conveyor, etc. arranged in series in front of a roller table, but is not limited to this. Moreover, in the above, the extrusion mold material includes those made of all metals such as aluminum that can be subjected to extrusion processing. When the extruded mold material is made of aluminum, the mold material protection sheet is made of aluminum foil, heat-resistant paper, heat-resistant synthetic resin, or the like. Moreover, if these materials are used, the sheet will not be burned or deformed by heat even when the aluminum extruded material is subjected to aging treatment after extrusion processing. Further, the sheet may be peeled off before the aging treatment, or may cover the required surfaces of the mold material even after the aging treatment and at the time of packaging and shipping. This prevents scratches and dirt from forming on the required surfaces of the extruded material until it is actually used. Covering with the protective sheet is not limited to only the required surface of the extruded material, but other surfaces may also be covered with the protective sheet.

Example This example shows the case of preventing scratches or dirt from adhering to the required surfaces of a thick plate-like extruded aluminum material having a horizontally rectangular cross section.

FIG. 1 shows an extrusion processing device 1, a roller table 2 disposed in front of the extrusion processing device 1, and a slat disposed in front of the roller table 2.
An extrusion line with a conveyor 3 is shown. Although not shown, the slat conveyor 3
A cooling table for placing the extruded mold material is placed on the side. The front part of the slat conveyor 3 and the rear part of the cooling table overlap when viewed from the side.

Although not shown in the drawings, the extrusion processing apparatus 1 includes an extrusion stem, a container, a die ring, an extrusion die, a cutter, and the like. On the upper surface of the roller table 2, a plurality of rotatable free rollers 4 whose axes are oriented in the left-right direction are provided at predetermined intervals in the front-rear direction. The conveying surface including the top of each free roller 4 is located at approximately the same height as the lower surface of the formed aluminum extruded material S extruded from the extrusion processing apparatus 1. roller table 2
A coiled aluminum foil 5 for protecting a profile (shaped material protection sheet) is disposed behind the last roller 4 in FIG. The width of the strip-shaped aluminum foil 6 fed out from the coiled aluminum foil 5 is wider than the width of the formed aluminum profile S extruded from the extrusion opening of the die of the extrusion processing device 1, so that it can cover the entire circumference of the profile S. It is spacious. The axis of the coiled aluminum foil 5 is parallel to the axis of the free roller 4 and located below this axis.
A small amount of strip-shaped aluminum foil 6 is unwound from the coil-shaped aluminum foil 5, and the front end portion of the strip-shaped aluminum foil 6 is placed on the rearmost free roller 4 (see the two-dot chain line in FIG. 2). Further, at a height position between the second free roller 4 from the rear and the third free roller 4 from the rear and at a predetermined distance above the free roller 4, there is a roller whose axial direction is the same as that of the free roller 4. A presser roller 7 that is rotatable parallel to the axial direction is arranged. The presser roller 7 is a roller
It is rotatably supported on the upper horizontal part 8a of a frame 8 which is erected astride the left and right edges of the table 2 and is shaped as seen from the front or rear via a support member 9 whose height can be adjusted. ing. A pair of first and second air blowing devices 11 and 12 on the left and right are arranged between the rearmost free roller 4 and the presser roller 7, with the former on the rear side. The first air blowing devices 11 are disposed below the upper end of the free roller 4 of the roller table 2, with air blowing ports facing upward, and with an interval wider than the width of the molding material S from each other.
The second air blowing devices 12 are arranged above the upper end of the molding material S, with their air outlets facing toward the other second air blowing devices 12, and with an interval wider than the width of the molding material S from each other. There is. The surface that includes the top surface of each slat 13 of the slat conveyor 3 covers all free surfaces of the roller table 2.
The upper end of the roller 4 is located at the same height as the included surface. Also, roller table 2 and slat
The height of each conveyor 3 is adjustable.

In such a configuration, the formed aluminum profile S extruded from the extrusion opening of the die of the extrusion processing apparatus 1 is first placed on the roller table 2 and sent forward by the extrusion force, and then transferred to the slat conveyor 3. It is placed on top and sent forward by the extrusion force and the driving force of the slat conveyor 3. It is preferable that the speed of the slat conveyor 3 is approximately equal to the extrusion speed so that the shapes S on the slat conveyor 3 do not shift relative to each slat 13. The length of the molded material S extruded from one aluminum billet is such that the front end is already placed on the slat conveyor 3 before the rear end is extruded from the extrusion opening.

First, when the front end of the formed aluminum shape material S extruded from the extrusion opening comes above the coiled aluminum foil 5, the end of the strip-shaped aluminum foil 6 that has been slightly let out is bent upward and the shape material S
(See the one-dot chain line in Figure 2). As the shape material S continues to move forward, the aluminum foil 6 is paid out forward, and the lower surface of the shape material S is covered with the aluminum foil S along the lower surface of the shape material S. When the aluminum foil 6 reaches above the first air blowing device 11, air is sprayed from this device 11 onto the portion of the aluminum foil 6 that extends laterally from the side edge of the shape material S. Then, the overhanging portion of the aluminum foil 6 is bent upward and placed against both sides of the molded material S, so that both sides are covered with the aluminum foil 6 (see FIG. 3). Further, when the shape material S moves forward and comes above the second air blowing device 12, air is blown onto the portion of the aluminum foil 6 that extends upward from the upper end of the shape material S using this device 12, and the aluminum foil 6 is bent inward,
It is placed on the upper surface of the mold material S, and the upper surface is covered with an aluminum foil 6 (see FIG. 4). In this state, the mold material S
When the aluminum foil 6 passes under the presser roller 7, the aluminum foil 6 is brought into close contact with the upper surface of the mold material S by the presser roller 7 (see FIG. 5). Therefore, the lower surface of the profile S is covered with aluminum foil 6 before being placed on the free roller 4 located at the rearmost position on the roller table 2, and since it is entirely wrapped in the aluminum foil 6, the free roller 4 Also, contact flaws and stains on the slat conveyor 3 with each slat 13 are prevented. The above operations are continued during extrusion molding, and the mold material S extruded from one aluminum billet is wrapped in aluminum foil 6 over its entire length. After the mold material S wrapped in aluminum foil 6 is placed entirely on the slat conveyor 3, it is transferred to a cooling table.
Then, place the required number of molds S on the cooling table.
After the shapes S have been loosened, they are subjected to straightening, cutting, etc., and then the aluminum foil 6 is peeled off and subjected to an aging treatment before being packed and shipped. Further, the product may be subjected to an aging treatment while being wrapped in aluminum foil 6, and then packaged and shipped.

In the above embodiment, the molding material S in contact with the roller table 2 and the slat conveyor 3 is
Although not only the lower surface but also the side and upper surfaces are covered with aluminum foil 6, the present invention is not limited to this, and in this case, only the lower surface may be covered with aluminum foil. Further, in the above embodiment, the shape material S is in the shape of a thick plate, but the shape of the shape material S is not limited to this.

Effects of the Invention In the method of the present invention, a coiled mold material protection sheet is disposed between an extrusion die and a conveying device so as to be fed forward, and the mold material that is extruded from the extrusion opening of the die is protected from the mold material. Since the sheet end is hooked on the front end and the sheet is fed out as the mold material moves forward to cover the required surface of the mold material with the sheet, it is extremely easy to cover the desired surface of the mold material with the mold material protection sheet. With this profile protection sheet, it is possible to completely prevent scratches and dirt from attaching to the required surfaces. Moreover, the work is easier and the cost is lower than that of the conventional method.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view showing a part of the extrusion processing line, Figure 2 is an enlarged view of the main part of Figure 1, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4. is the second
5 is a cross-sectional view taken along the line - in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line - in FIG. 2... Roller table, 5... Coiled aluminum foil (protective sheet for coiled shape material), S
...molding material.

Claims (1)

[Claims] 1. A coil-shaped material protection sheet is placed between the extrusion die and the conveying device so that it is fed forward, and the sheet edge is hooked onto the front end of the molded material that is extruded from the extrusion opening of the die. A method for preventing scratches and stains on extruded molded material, characterized by feeding out a sheet as the molded material moves forward, and covering a desired surface of the molded material with the sheet.