JPS61289913A - Preventing method for flaw and stain of extruded shape material - Google Patents

Abstract

PURPOSE:To improve the efficiency of preventing the flaw and stain of a shape material by disposing a shape material protective sheet between an extrusion die and conveyor and covering the required surface of the shape material with the sheet on advancing of the shape material. CONSTITUTION:The coiled shape material protective sheet 5 is disposed behind a roller 4 in the final position of a roller table 2 and some belt-like sheet 6 is let off onto the roller 4. The end of the sheet 6 is hooked to the front end of the molded Al shape material S when the shape material S is fed from an extrusion working device 1. The bottom surface of the material S is covered by the sheet 6 on advancing of the material S. Both side faces of the material S are then covered with the 1st air blower and the sheet 6 thoroughly covers the top surface of the material S in the position of the 2nd air blower 12. The sheet 6 covers all the required surface of the material S in the above-mentioned manner and therefore the efficiency of preventing the flaw and stain on the surface of the material S is improved and the cost is reduced.

Description

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

Prior art and its problems Immediately after extrusion molding, an extruded molded material is moved from its front end by a device consisting of, for example, a roller table equipped with a plurality of rotatable free rollers and a slat conveyor connected thereto. After being transferred to -H cooling table, it is transported to a predetermined processing position for further processing. Therefore, when transported by the above-mentioned transport device,
When transferring to the cooling table and cooling
When the extruded material is transported from the table to the next processing position, contact paper or dirt may adhere to the extruded material. 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, an aluminum extrusion
When 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 will cause a decrease in the degree of vacuum inside the vacuum section.

In order to prevent the paper and dirt mentioned above, conventional methods have been to wrap carbon fiber around the rollers of roller tables, use carbon or Bakelite slats for slat conveyors, and use molded materials for cooling tables. The surface of the support part is covered with a carbon plate or Bakelite plate to prevent contact scratches and 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 contact scratches and dirt from contact with the conveying equipment etc. to the extruded material,
A scratch/stain prevention member that supports the extruded mold material in a floating state so that the required surface of the conveyance time mold material does not come into contact with the conveyance device is integrally extruded from one extrusion opening that includes portions corresponding to both parts. However, 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 flaw/stain prevention member during extrusion molding, and the prevention member can be broken off or cut at this thin part. They were separated by doing so. 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. In addition, reducing the thickness of the thin part has an upper limit on the properties of extrusion molding, so it may cause defects or damage.
The antifouling member could not be easily removed from the mold material.

The purpose of this invention is to solve the above-mentioned problems by preventing defects and
The object of the present invention is to provide a method for preventing dirt.

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 mean forward.

Means for Solving the Problems The method for preventing scratches and stains on extruded materials according to the present invention includes a method for preventing scratches and stains on extruded molded materials, in which a
/%/1 A coiled mold protection sheet is arranged so that the sheet is extruded from the extrusion opening of the die. It is characterized by covering the required surface with a sheet.

In the above, the conveying device includes a roller table on which the molded material extruded from the extrusion opening is first placed, and a slat placed in series in front of the roller table.
It is generally composed of a conveyor or the like, 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 molded material even during packaging and shipping after the aging treatment. 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.

Embodiment This embodiment 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.

Figure 1 shows an extrusion processing device (1) and an extrusion processing device (1).
) and a slat conveyor (3) located in front of the roller table (2).

Although not shown in the drawings, a cooling table for placing extruded shapes is arranged on the side of the slat conveyor (3). 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, the extrusion processing apparatus (1) includes an extrusion stem, a container, a die ring, an extrusion die, a backer, and the like. On the upper surface of the roller table (2), there are a plurality of rotatable free rollers (4) whose axes are oriented in the left and right directions.
A plurality of them are provided at predetermined intervals in the front-rear direction.

The conveying surface, which includes the top of each free roller (4), is
It is located at approximately the same height as the lower surface of the aluminum extrusion material (S) extruded from the extrusion processing device (1).

Last roller (4) in roller table (2)
A coiled aluminum foil (5) (shaped material protection sheet) for protecting the shaped material is arranged at the rear of the shape material, and is rolled out from above to the front. 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). It is wide enough to cover the entire circumference of (S). The axis of the coiled aluminum foil (5) is parallel to and located below the axis of the free roller (4). Some strip-shaped aluminum foil (6) is unwound from the coil-shaped aluminum foil (5), and the part near the front end is placed on the rearmost free roller (4) (second
(See the two-dot chain line in Figure 2). In addition, 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 in the axial direction. A presser roller (7) is arranged which is rotatable and parallel to the axial direction of the free roller (4). The presser roller (7) is mounted at a height position on the upper horizontal part (8a) of a frame (8) which is n-shaped when viewed from the front or rear and which is erected across the left and right edges of the roller table (2). It is rotatably supported via a support member (9) that can adjust the rotation. Between the free roller (4) at the rearmost position and the presser roller (7), a pair of first and second air blowing devices (11, 12) are arranged on the left and right, respectively, with the former on the rear side. It's being fucked. The first air blowing device (11) is
Below the upper end of the free roller (4) of the roller table (2), the air outlets are directed upward and are spaced from each other at an interval wider than the width of the molding material (S). The second air blowing device (12) connects air blowing ports to other second air blowing ports above the upper end of the molding material (S).
The air blowing device (12)
They are arranged at intervals wider than the width of S). The plane containing the top surface of each slat (13) of the slat conveyor (3) is at the same level as the plane containing the top ends of all free rollers (4) of the roller table (2). Further, the roller table (2) and the slat conveyor (3) are each height adjustable.

In such a configuration, the pre-extrusion (1) formed aluminum profile extruded from the extrusion opening of the die of the device (1);
S) is first placed on the roller table (2) and sent forward by the pushing force, and then transferred to the slat conveyor (3).
) and is sent forward by the extrusion force and the driving force of the slat conveyor (3). Slat conveyor (
The speed of step 3) is set approximately equal to the extrusion speed, and the shape material (S) on the slat conveyor (3) is
) It is preferable to keep it in place. Note that the length of the molded material (S) extruded from one aluminum billet is such that the rear end is at the end, and the front end is attached to the slat conveyor (3) before being extruded from the extrusion opening.
) is long enough to fit on top.

First, the front end of the formed aluminum shape material (S) extruded from the extrusion opening is a coiled aluminum foil (5).
When it reaches above the aluminum foil strip (6), bend the end of the strip-shaped aluminum foil (6) that has been slightly extended upward and hook it onto the front end of the shape material (S) (see the one-dot chain line in FIG. 2). As the mold 1fA (S) continues to move forward, the aluminum foil (6) is fed forward and along the lower surface of the mold material (S), the lower surface of the mold material (S) is covered with the aluminum foil (S). And the first air blowing device @ (11
), air is blown from this coating onto the portion of the aluminum foil (6) that protrudes laterally from the side edge of the shape material (S). Then, aluminum foil (
The overhanging portion 6) is bent upward and placed against both sides of the profile (S), and both sides are covered with aluminum foil (6) (see Figure 3). Furthermore, the mold material (S) moves forward, and the second
Air blows when the air is above the device (12).
At step 12), when air is blown onto the part of the aluminum foil (6) that extends upward from the upper end of the shape material (S), the aluminum foil (6) is bent inward and laid on the top surface of the shape material (S), The top surface is covered with aluminum foil (6) (
(See Figure 4). In this state, the shape material (S) is
), the aluminum foil (6) is brought into close contact with the upper surface of the profile (S) by the presser roller (7) (see Fig. 5). Therefore, the lower surface of the profile (S) is covered with aluminum foil (6) before it rests on the rearmost free roller (4) on the roller table (2), and moreover, it is entirely wrapped in aluminum foil (6). Therefore, contact flaws and dirt on the free roller (4) and the slat conveyor (3) with each slat (13) are prevented. The above operation is continued during the extrusion process, and the profile (S) extruded from one aluminum billet is wrapped with aluminum foil (6) over its entire length.

The shape material (S) wrapped in aluminum foil (6) is placed entirely on the slat conveyor (3) and then transferred to the cooling table. After the required number of molds (S) are accumulated on the cooling table, these molds (S) are straightened and cut all at once, and then the aluminum foil (6) is peeled off and aged. Processed, packaged, and shipped. In addition, 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 lower surface of the molding material (S) in contact with the roller table (2) and the slat conveyor (3) is the aluminum foil (rather than the side and top surfaces).
6), but 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 embodiments, the mold material (S) has a thick plate shape, but the shape of the mold 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 placed 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. 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. This protective sheet can completely prevent scratches and dirt from forming on 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, and Figure 3 is the - of Figure 2.
4 is a sectional view taken along the line TV--TV in FIG. 2, and FIG. 5 is a sectional view taken along the line v--v in FIG. 2. (2)... Roller table, (5)... Coiled aluminum foil (protective sheet for coiled shape material), (S
)...Mold material. 4 people other than above

Claims (1)

[Claims] A coil-shaped material protection sheet is placed between the extrusion die and the conveying device so that it is fed forward, and the end of the sheet 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 an extruded molded material, characterized in that the sheet is fed out by advancing and the required surface of the molded material is covered with the sheet.