JP7253267B2 - Manufacturing method for product sheet made of transparent soft synthetic resin - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing product sheets such as table mats and decorative acrylic signboards, which require surface flatness.

Product sheets are usually manufactured by processing a transparent or translucent soft synthetic resin base sheet material. When decorations, etc. are required, decorative figures, etc. In some cases, the back surface of the product sheet is printed, and in other cases, the back surface of the product sheet is subjected to cutting or the like to impart a pattern, a decorative figure, or the like. Anti-slip processing etc. may be applied to the back surface of the product sheet.

Japanese Patent Application Laid-Open No. 2007-69387 (Patent Document 1) discloses a decorative transparent sheet in which a decorative portion is formed by cutting on the back surface of the sheet. FIG. 2 cites and publishes FIG. 1 of this patent document 1. FIG.

The invention described in Patent Document 1 will be briefly described with reference to FIG. The transparent sheet 1 has a rectangular shape with a predetermined thickness. A tapered surface 7 is formed on the upper half portion of the surface 2a side of the entire circumference of 5, the tapered surface 7 being inclined inward as it goes upward. A lower portion of the tapered surface 7 is a vertical surface 8, and the tapered surface 7 is set at an inclination angle .theta.1 with respect to the vertical surface 8 within a range of 35 to 55 degrees.

As shown in FIG. 2(A), on the back surface 2b of the transparent sheet body 2, V-shaped grooves cut from the back surface 2b are formed at the four corners of the transparent sheet body 2 so as to form decorative portions composed of figures, symbols, characters, or a combination thereof. 9 is formed.

Japanese Patent No. 5941671 (Patent Document 2) discloses a method for edge processing of a soft resin sheet used for manufacturing desk mats, table mats, etc. made of soft synthetic resin. Specifically, a method for processing the outer peripheral end face of the soft resin sheet to have the tapered surface 7 and the vertical surface 8 as shown in FIG. 2 is described.

The edge processing method for a soft resin sheet described in Patent Document 2 includes the following steps.

(a) A slanted blade is inserted into the surface of the original sheet material held on the support base and moved along the outer shape of the product sheet to form an inclined cut so as to surround the product sheet. cutting process.

(b) By inserting a vertical blade into the surface of the original sheet material held on the support table so as to reach the back surface and moving it along the outer shape of the product sheet, the vertical cut connected to the inclined cut is formed in the product. A second cutting step for forming around the sheet and separating the product sheet from the original sheet material.

JP 2007-69387 A Japanese Patent No. 5941671

In the edge processing method described in Patent Document 2, an oblique blade is first inserted from the surface side of the product sheet of the original sheet material, and then a vertical blade is inserted from the surface side of the product sheet. The processing method for the decorative portion described in Patent Literature 1 performs cutting from the back side of the product sheet. For some products such as desk mats and acrylic signboards, the surface side is often required to be flat and plain (excluding printing, etc.), and it is common to apply patterns and anti-slip processing to the back side of the product sheet. Common.

When performing additional processing on a product sheet that has already been processed and removed from the processing table, the product sheet must be placed on the processing table again. At that time, the product sheet must be accurately positioned on the processing table There is a need to. If the product sheet cannot be positioned accurately, processing misalignment or the like will occur. If the additional processing is a forming process such as a decoration, there arises a problem that the decorative portion cannot be formed at a desired position.

When performing the product sheet edge processing method described in Patent Document 2 on the original sheet material and further performing the decorative processing on the back surface of the product sheet described in Patent Document 1, first, the edge of the original sheet material is removed from the product surface side. After edge processing, the product sheet is separated from the original sheet material and taken out, and then the product sheet is turned over and accurately positioned on the processing table, and the back surface of the product sheet is decorated.

As described above, edge processing is performed from the front side of the product sheet, then the product sheet is turned over and placed on the processing table, and additional processing such as decoration formation is performed from the back side of the product sheet. There are problems with

First, the process of turning over the product sheet and placing it on the processing table is required, which increases the number of work steps and also results in defective products with patterns, etc. that are out of position due to poor positioning when the product sheet is re-installed. may occur. Some product sheets have a relatively large weight depending on the material. When a relatively heavy product sheet is turned over, the product sheet may be greatly bent. Therefore, the work of turning over the product sheet and accurately positioning and setting it on the processing table again is a heavy burden on the operator. Efficiency is also reduced.

In the edge processing method described in Patent Literature 2, after the edge processing is performed from the surface side of the original sheet material, cut shavings remain on the inclined surface of the outer peripheral edge of the product sheet. Therefore, when the product sheet is to be taken out from the original sheet material after edge processing, the outer peripheral edge of the product sheet is caught in the cutting residue, so the residue must be removed by tearing off the residue or lifting the residue. work is required. Further, when performing additional processing on the product sheet after edge processing, it is necessary to clean the processing table surface of the processing machine prior to the additional processing. Such work is also troublesome for the operator.

When processing and extracting multiple types of product sheets with different sizes, patterns and decorative designs from the original sheet material, it is necessary to perform the above operation for each type of product sheet. The production efficiency of the product sheet of the kind becomes bad.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of manufacturing a product sheet that is highly efficient and capable of achieving high-precision processing.

A method for manufacturing a product sheet according to the present invention includes the following steps.

(a) The first processing tool is vertically inserted into the product back side of the original sheet material, and the first processing tool is moved along the shape of the outer periphery of the product to a depth that does not reach the surface of the product to make a vertical cut. The process of forming a part.

(b) Insert the second processing tool obliquely from the outside of the vertical cut portion on the back side of the product of the original sheet material, cross the vertical cut portion, and reach the product surface portion. A step of moving along the shape of the outer periphery of the product to form an inclined cut.

(c) A step of taking out from the original sheet material a product sheet having inclined surfaces corresponding to the above-mentioned inclined cut portions at the outer peripheral corners of the product surface and vertical surfaces corresponding to the above-mentioned vertical cut portions at the product outer peripheral portion.

A method for manufacturing a product sheet according to one embodiment of the present invention includes, prior to the step of forming the inclined cut portion, a step of performing decoration processing on the back side of the product from the back side of the original sheet material using a third processing tool. Prepare. In this case, preferably, the vertical cut portion forming step is performed after the decorating step.

In one embodiment, the first machining tool is a vertical blade and the second machining tool is an angled blade. Moreover, the original sheet material is typically made of a soft synthetic resin.

According to the invention of the present application, since the edge processing of the product sheet is performed from the back side of the product sheet of the original sheet material, even if additional processing is performed on the back surface of the product sheet after the edge processing, the product sheet is turned over. Additional processing can be performed on the product sheet on the processing table subsequent to the edge processing.

It is a figure which shows the manufacturing process of the product sheet which concerns on one Embodiment of this invention. FIG. 1 is a diagram in which FIG. 1 of Japanese Patent Laying-Open No. 2007-69387 (Patent Document 1) is cited.

A manufacturing process of a product sheet according to one embodiment of the present invention will be described with reference to FIG.

First, as shown in FIG. 1A, an original sheet material 20 made of, for example, a transparent soft synthetic resin is placed on a processing table 30 . The original sheet material 20 has a predetermined thickness and, for example, a rectangular shape, and is immovably placed on the processing table 30 by air suction or the like.

The original sheet material 20 is typically a raw material for taking out a product sheet 25 such as a desk mat or a signboard, but any material can be used as long as it can be processed by a processing tool to be described later. There may be. Further, in the present embodiment, the original sheet material 20 is made of a transparent soft synthetic resin so that the decorative portion formed on the back surface of the product sheet 25 can be seen through from the front surface side of the product sheet 25, but it is translucent. or colored ones. Furthermore, the shape of the original sheet material 20 is not limited to a square, and may be other shapes such as a circle.

The original sheet material 20 has a product front side 20 a that is the front side of the product sheet 25 and a product back side 20 b that is the back side of the product sheet 25 . In one embodiment of the present invention, as the first processing step, the third processing tool 33 is used to perform decoration processing from the back surface side 20b of the original sheet material 20 to the back surface portion of the product to form the decoration portion 23 . The third processing tool 33 is, for example, a cutting tool such as an end mill or a drill, and performs V-groove processing on the product back side 20b of the original sheet material 20 in a controlled motion to form the decorative portion 23 . The decoration part 23 is a figure, a symbol, a character, or a combination thereof.

When the first processing step for forming the decorative portion shown in FIG. 1(a) is completed, the original sheet material 20 is left on the processing table 30, and the vertical cut portion forming step shown in FIG. 1(b) continues. As shown in FIG. 1(b), the first processing tool 31 is vertically inserted from the back side of the original sheet material 20, and the first processing tool 31 is inserted into the outer periphery of the product to a depth that does not reach the surface portion 20a of the product. , to form a vertical cut 21 .

The first processing tool 31 is, for example, a vertical blade that vertically cuts the back surface of the original sheet material 20 . Since the vertical cut portion 21 does not reach the product surface portion 20a, the portion that will become the product sheet cannot be separated from the original sheet material 20 yet.

After the vertical incision forming step shown in FIG. 1(b) is completed, the original sheet material 20 is left on the processing table 30, and the inclined incision forming step shown in FIG. 1(c) continues. As shown in FIG. 1(c), a second processing tool 32 is obliquely inserted from the outside of the vertical cut portion 21 on the back side 20b of the raw sheet material 20, and the second processing tool 32 is inserted into the vertical cut portion 21. The slanted cut portion 22 is formed by moving along the shape of the outer peripheral portion of the product to a depth reaching the surface portion 20a of the product by intersecting.

The second processing tool 32 is, for example, an inclined blade that obliquely cuts the back surface of the original sheet material 20 . Since the inclined cut portion 22 reaches the product surface portion 20 a , the portion 25 to be the product sheet can be separated from the original sheet material 20 . The inclination angle of the inclined blade 32 with respect to the back surface of the product sheet 25 is preferably 35 to 55 degrees, more preferably 45 degrees.

After the step of forming the inclined cut portion shown in FIG. 1(c), the product sheet 25 is separated from the original sheet material 20 and taken out as shown in FIG. 1(d). The product sheet 25 has inclined surfaces 26 corresponding to the inclined cuts 22 at the outer peripheral corners of the product surface 20a, and has vertical surfaces 27 corresponding to the vertical cuts 21 at the product outer periphery. The angle formed by the surface 20a of the product sheet 25 and the inclined surface 26 is preferably 125 to 145 degrees, more preferably 135 degrees. The angle formed by the inclined surface 26 and the vertical surface 27 of the product sheet 25 is also preferably 125 to 145 degrees, more preferably 135 degrees.

When the product sheet 25 is separated from the original sheet material 20 and taken out, the cutting residue 28 of the original sheet material 20 remains adjacent to the outer peripheral edge of the product sheet 25, and the original sheet material 20 is left around the product sheet 25. Although the remainder 29 remains, there is no particular problem. That is, since the outer peripheral edge of the product sheet 25 is formed by the vertical surface 27 and the inclined surface 26 that tapers downward, the product sheet 25 is processed while leaving the cutting waste 28 and the remaining portion 29 as they are. It can be removed upward from the table 30 .

Various effects can be obtained according to the above-described embodiments of the present invention. First, with the original sheet material 20 facing up on the processing table 30, the decorative portion forming processing and the edge processing can be performed simultaneously or successively in the same machine body and in the same processing station. Therefore, complicated work such as turning over the original sheet material 20 in the middle is unnecessary, and furthermore, it is possible to eliminate the occurrence of defective products caused by misalignment or the like associated with re-installation of the original sheet material 20 .

In addition, since the product sheet 25 can be separated and taken out from the original sheet material 20 without removing the cutting scraps 28 and the remaining portion 29 of the original sheet material 20, the work required for cleaning and removing waste such as cut scraps can be eliminated. can be reduced. According to the present invention, even when a plurality of types of product sheets are processed and taken out from a common original sheet material, after the plurality of product sheets are taken out collectively, the cutting scraps 28 and the residual original sheet material 29 are collectively removed. can. Furthermore, even if shavings remain on the back surface of each product sheet 25 after processing the decorative portion, they can be collectively removed on a shavings basket or the like. As a result, the work of cleaning the processing table of the processing machine is reduced, and efficient processing can be performed.

The manufacturing process shown in FIG. 1 is one embodiment of the present invention, and may be another embodiment. For example, the step of forming the decorative portion 23 (FIG. 1A) may be performed after the step of forming the vertical cut portion 21 (FIG. 1B), or may be performed simultaneously with the step of forming the vertical cut portion 21. good too.

Depending on the type of product sheet, it is possible to omit the step of forming the decorative portion. Alternatively, instead of the decorative part forming step or as an additional process, the back surface of the product sheet may be subjected to non-slip processing, printing processing, or the like.

Although several embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Various modifications and changes can be made to the above-described embodiment within the same scope as the present invention or within an equivalent scope.

INDUSTRIAL APPLICABILITY The present invention can be advantageously used as a method for manufacturing sheet-like products such as desk mats, cutting mats, and decorative signboards.

20 Original sheet material 20a Product surface side 20b Product back surface side 21 Vertical cut portion 22 Inclined cut portion 23 Decorative portion 25 Product sheet 26 Inclined surface 27 Vertical surface 30 Processing table 31 First processing tool , 32 second machining tool, 33 third machining tool.

Claims (3)

A first processing tool is vertically inserted into the back side of a product made of a transparent soft synthetic resin , and the first processing tool is moved along the shape of the entire outer periphery of the product to a depth that does not reach the surface of the product. forming a vertical cut extending along the entire perimeter of the
A second processing tool is obliquely inserted from the outer side of the vertical cut portion on the back side of the product of the raw sheet material, and the second processing tool is made to intersect the vertical cut portion so as to reach the product surface portion. A step of moving along the shape of the entire outer peripheral portion of the to form an inclined cut portion;
a step of taking out from the original sheet material a product sheet having inclined surfaces corresponding to the inclined incisions on all outer peripheral corners of the product surface and vertical surfaces corresponding to the vertical incisions on the entire outer peripheral portion of the product ;
A method for producing a product sheet made of a transparent soft synthetic resin, which comprises, prior to the step of forming the inclined cut portion, performing decoration processing on the product back surface of the original sheet material from the product back surface using a third processing tool. 2. The method for producing a transparent soft synthetic resin product sheet according to claim 1, wherein said vertical incision forming step is performed after said decorating step . the first processing tool is a vertical blade;
3. The method for producing a transparent soft synthetic resin product sheet according to claim 1 or 2 , wherein said second processing tool is an inclined blade.

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