Manufacturing method of acrylic sheet products

Abstract

To provide a manufacturing method of an acrylic sheet product, in which an acrylic sheet is prevented from being scratched when removing a mask material.SOLUTION: A manufacturing method of an acrylic sheet product decorates an acrylic sheet on which a protective sheet is attached. The manufacturing method of an acrylic sheet product includes a mask material formation step S2, a mask material attachment step S3, a sandblast step S5, and a removal step S10. In the mask material formation step S2, a mask material with a pattern to be applied to an acrylic sheet is formed. In the mask material attachment step S3, following the mask material formation step S2, the mask material is partly attached from above the protective sheet. In the sandblast step S5, following the mask material attachment step S3, an abrasive material is jetted toward the mask material. In the removal step S10, following the sandblast step S5, the protective sheet is removed from the acrylic sheet together with the mask material.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a method for producing an acrylic sheet product. By law Regarding. [Background technology]

[0002] It is known that a design is applied to a glass plate as a decoration by sandblasting. For example, in a conventional manufacturing method, a cutting sheet (registered trademark, hereinafter referred to as "mask material") with a design cut out is directly attached to the glass plate before the design is imprinted on the glass plate by sandblasting (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2-055247 Summary of the Invention [Problem to be solved by the invention]

[0004] However, as with conventional glass plates, when a masking material is directly applied to an acrylic plate, there is a problem in that the acrylic plate may be scratched when the masking material is peeled off.

[0005] The present disclosure has been made in light of the above-mentioned problems, and aims to prevent the acrylic plate from being scratched when the mask material is peeled off. [Means for solving the problem]

[0006] To achieve the above objectives , Books The disclosed method for manufacturing an acrylic sheet product includes decorating an acrylic sheet to which a protective sheet is attached. The method for manufacturing an acrylic sheet product of the present disclosure includes a mask material forming step, a mask material attaching step, and a sandblasting step. A static electricity removing process, a cleaning process, and a drying process.and a peeling process. In the mask material forming process, a mask material with a pattern to be applied to the acrylic plate is formed. In the mask material pasting process, after the mask material forming process, the mask material is partially pasted on top of the protective sheet. In the sandblasting process, after the mask material pasting process, an abrasive is sprayed toward the mask material. In the static electricity removing step, after the sandblasting step, charged ions are sprayed onto the acrylic plate to remove static electricity from the acrylic plate. In the cleaning step, after the static electricity removing step, the acrylic plate is washed with water. In the drying step, after the cleaning step, the protective sheet is dried. In the peeling process, After the drying process The mask material is peeled off together with the protective sheet from the acrylic plate. 。 Effect of the Invention

[0007] Therefore ,Ma This can prevent the acrylic plate from being scratched when the screen material is peeled off. In addition, when the protective sheet is peeled off, scratches and marks on the acrylic plate can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a case in which the acrylic plate product of the embodiment is used. [Diagram 2] FIG. 2 is a diagram showing the order of steps in a manufacturing method for an acrylic sheet product according to an embodiment of the present invention. [Diagram 3] FIG. 13 is a diagram showing a state after a mask material attaching step of the embodiment. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. 3, showing a state after a mask material attaching step of the embodiment. FIG. [Diagram 5] FIG. 13 is a diagram showing a state where a coating step of the embodiment has been performed. [Figure 6] 6 is a cross-sectional view of the state after the covering step of the embodiment, taken along the line BB in FIG. 5. FIG. [Figure 7] FIG. 13 is a diagram showing a state in which an abrasive is being sprayed in the sandblasting process of the embodiment. [Figure 8] FIG. 13 is a diagram showing a partition using a modified acrylic plate product. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The following describes the manufacturing method of the acrylic plate product according to the present disclosure. Law DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings.

[0010] As shown in Fig. 1, the acrylic sheet product 1 in the embodiment is used as, for example, a case frame on the side of a case 100. Incidentally, for example, a doll (not shown) is stored in the case 100. A pattern 1c is not engraved on the front surface 1a of the acrylic sheet product 1, and a pattern 1c (letters, figures, symbols, etc.) is engraved (decorated) on the back surface 1b of the acrylic sheet product 1 by sandblasting. Incidentally, the pattern 1c in Fig. 1 is a checkered pattern, but is not limited to this.

[0011] Next, a method for producing the acrylic sheet product 1 will be described with reference to FIGS.

[0012] The acrylic sheet product 1 is manufactured by one worker (one business) in the order including the steps shown in Fig. 2. Each step will be explained in order below. In the following, the product after the coating step S11 is completed will be referred to as the "acrylic sheet product 1", and the product before the coating step S11 is completed will be referred to as the "acrylic sheet 10".

[0013] First, in a cutting step S1, the acrylic plate 10 is cut to fit the dimensions of the case frame. The acrylic plate 10 is cut by a plate material cutting machine (panel saw) not shown. The thickness of the acrylic plate 10 is, for example, 2 mm. The acrylic plate 10 has a protective sheet 11 attached to both the front surface 10a and the back surface 10b of the acrylic plate 10 (see FIG. 4, etc.), and each step is performed without peeling off the protective sheet 11 until the peeling step S10. The acrylic plate 10 is made of acrylic resin molded into a plate shape, and is transparent in this embodiment.

[0014] Here, there are two types of acrylic plate 10: cast plate (cast material) and extruded plate (extruded material). A cast plate is made by pouring acrylic resin between two glass plates and then hardening it. An extruded plate is made by extruding acrylic resin with a roller. An extruded plate is used as the acrylic plate 10 in the embodiment.

[0015] Next, in the mask material forming step S2, a mask material 2 of a pattern 1c to be applied to the acrylic plate 10 is formed. In the case of the pattern 1c in FIG. 1, a hole 21 having the same shape as the pattern 1c to be applied to the acrylic plate 10 is formed in the mask material 2 in the mask material forming step S2 (see FIG. 4, etc.). In other words, in the mask material forming step S2, a shape identical to the pattern 1c to be applied to the acrylic plate 10 is cut out from the mask material 2. The mask material 2 remains around the hole 21 formed in the mask material 2. The mask material 2 is an adhesive sheet (e.g., Cutting Sheet (registered trademark)). The shape is formed (cut out) by a cutting plotter (not shown). The cutting plotter cuts out the pattern 1c from the adhesive sheet based on data input in advance under computer control. The mask material 2 is, for example, a laminate of a mask layer 2b, an adhesive layer 2c, and a release paper layer (not shown) (see FIG. 4, etc.). In the state where the mask material forming step S2 is performed, the hole portion 21 is in a state where the mask layer 2b and the adhesive layer 2c are cut out by a cutting plotter from among the mask layer 2b, the adhesive layer 2c, and the release paper layer, and the release paper layer remains. The release paper layer maintains the positional relationship of the multiple holes 21. When the release paper layer is peeled off from the mask material 2, the adhesive layer 2c is exposed. The strength of the mask material 2 is set to a strength that is not polished by the abrasive material 4 depending on the size of the particles of the abrasive material 4 sprayed in the sandblasting step S5 (particle diameter, see FIG. 7), the spraying pressure, the spraying time, etc. The mask material 2 leaves a marginal mask portion that allows a margin around the pattern 1c to be applied to the acrylic plate 10. The size of the marginal mask portion is set to a size that prevents the abrasive material 4 from being sprayed directly onto the protective sheet 11 when the abrasive material 4 is sprayed to the edge portion of the hole portion 21 in the sandblasting step S5. The size of the marginal mask portion is set in advance by experiments, etc. The combined size of the hole 21 for applying the pattern 1c on the acrylic plate 10 of the mask material 2 and the area around the hole 21 (including the extra mask area) is set smaller than the size of the protective sheet 11.

[0016] Next, in a mask material application step S3, a mask material 2 is placed on a portion of the acrylic plate 10 where the pattern 1c is to be applied. After that, while the release paper layer of the mask material 2 is peeled off, the mask material 2 is partially applied onto the protective sheet 11 of the acrylic plate 10, as shown in Figs. 3 and 4.

[0017] Next, in the covering step S4, as shown in FIG. 3, FIG. 5, and FIG. 6, the entire periphery of the edge 11a of the protective sheet 11 and the entire periphery of the edge 2a of the mask material 2 are covered with an adhesive tape 3 (e.g., masking tape). The covering step S4 includes two steps, a protective sheet covering step S41 and a mask material covering step S42. First, in the protective sheet covering step S41, the entire periphery of the edge 11a of the protective sheet 11 is covered with an adhesive tape 3. In the protective sheet covering step S41 of the embodiment, the side surface 10c of the acrylic plate 10 is also covered with the adhesive tape 3 (see FIG. 6). Note that the side surface 10c of the acrylic plate 10 is a surface that contacts the front surface 10a and the back surface 10b of the acrylic plate 10. After this, in the mask material covering step S42, the entire periphery of the edge 2a of the mask material 2 is covered with the adhesive tape 3. It is preferable that the strength of the adhesive tape 3 is set to a strength that is not polished by the abrasive 4, similar to the strength of the mask material 2. It is noted that either the protective sheet covering step S41 or the mask material covering step S42 may be performed first.

[0018] Next, in the sandblasting process S5, as shown in FIG. 7, the abrasive 4 is sprayed toward the mask material 2 (particularly the hole 21 of the mask material 2 and the surrounding area of ​​the hole 21). The sandblasting process S5 is performed in a sandblaster (not shown). The acrylic plate 10 is fixed by a fixing table 6. The abrasive 4 is sprayed (blown) from a nozzle 5 to the acrylic plate 10 together with compressed air using a compressor (not shown). The sprayed abrasive 4 removes the protective sheet 11 on the back surface 10b of the acrylic plate 10, and engraves a predetermined pattern 1c shown in FIG. 1 on the back surface 10b of the acrylic plate 10. For example, the particle size of the abrasive 4 is 90 μm (micrometers) to 125 μm. The spray pressure of the abrasive 4 is 0.1 MPa. The spray time of the abrasive 4 is 1 cm. 2The time required for engraving is 5 seconds per 100 mm. The particle size of the abrasive 4, the injection pressure, the injection time, etc. are changed based on the depth of the pattern 1c to be engraved, the strength of the acrylic plate 10, etc. The sandblaster is a room where the sandblasting process S5 is performed. In the sandblasting process S5, the acrylic plate 10 is before the bending process S9 is performed, and the long state (flat state) is maintained.

[0019] Next, in the static electricity removal step S6, charged ions (not shown) are sprayed onto the acrylic plate 10 to remove static electricity from the acrylic plate 10. In the static electricity removal step S6, the static electricity from the acrylic plate 10 is removed by an air duster with an ionizer (not shown). This removes particularly large particles of the abrasive 4 from among the particles of the abrasive 4 remaining on the acrylic plate 10, the protective sheet 11, and the masking material 2. The ionizer is a static eliminator. The ionizer generates charged ions and uses the charged ions to eliminate (neutralize) static electricity from the acrylic plate 10, the masking material 2, and the like. The air duster releases compressed air from a compressor from a nozzle. The air duster with an ionizer sprays the charged ions onto the entire acrylic plate 10 together with the compressed air (air). The static electricity removal step S6 is carried out, for example, by spraying a 10 cm 2 portion of the acrylic plate 10 with an air duster. 2 The charged ions are sprayed together with the compressed air around the acrylic plate 10 for one second. This time period varies depending on the performance of the ionizer and the size of the particles of the abrasive 4. After the charged ions are sprayed onto the acrylic plate 10, compressed air may be sprayed onto the acrylic plate 10.

[0020] Here, in the sandblasting step S5, static electricity is generated on the acrylic plate 10 due to friction when the acrylic plate 10 and the abrasive 4 collide. Similarly, static electricity may be generated on the mask material 2, etc. In other words, the acrylic plate 10, etc. is charged due to friction. In this way, since the acrylic plate 10, etc. is positively or negatively charged, charged ions, negative ions or positive ions, with the opposite sign to the charged ions, are sprayed on the acrylic plate 10 and the mask material 2, etc., to remove the static electricity.

[0021] Next, in a cleaning step S7, the acrylic plate 10 is cleaned with water. For example, the entire acrylic plate 10 is cleaned with running water. As a result, among the particles of the abrasive 4 remaining on the acrylic plate 10, the protective sheet 11, and the mask material 2, particularly the smaller particles of the abrasive 4 are removed.

[0022] Next, in the drying step S8, the acrylic plate 10 including the protective sheet 11 is dried. In the drying step S8, the acrylic plate 10 is placed in a well-ventilated shade to allow the acrylic plate 10 including the protective sheet 11 to dry naturally. A semi-dry state is insufficient, and the acrylic plate 10 is dried until there is no moisture throughout the acrylic plate 10. The drying is completed until the adhesive (not shown) of the protective sheet 11 is dry. The protective sheet 11 may be dried using a blower (not shown). Since the acrylic plate 10 may be deformed by heat, drying in the sun or with hot air is avoided.

[0023] Next, in the bending process S9, the acrylic plate 10 is bent into a predetermined shape. In the bending process S9, heat is applied to the acrylic plate 10, and the acrylic plate 10 is bent into the shape of the case frame of FIG. 1 (predetermined shape) by a bending machine (not shown). The acrylic plate 10 is bent so that the back surface 10b of the acrylic plate 10 on which the pattern 1c is engraved is inside the case 100 of FIG. 1. The bending machine is used to bend the acrylic plate 10. Specifically, first, the acrylic plate 10 is sandwiched between rollers of the bending machine. Next, pressure is applied to the acrylic plate 10 through the rollers, thereby bending the acrylic plate 10.

[0024] Next, in a peeling step S10, the adhesive tape 3, the mask material 2, and the protective sheet 11 are peeled off from the acrylic plate 10.

[0025] Next, in a coating step S11, an antistatic agent (not shown) is coated on the acrylic plate 10. The antistatic agent is coated by wiping the acrylic plate 10 with a sheet to which the antistatic agent is applied.

[0026] Next, in an assembly process S12, the acrylic plate product 1 and the back plate 101 are vertically sandwiched between the top plate 102 and the base 103, and assembly is performed to complete the case 100 (see FIG. 1).

[0027] Next, the operation of the embodiment will be described.

[0028] The acrylic plate 10 is more susceptible to scratches than a glass plate. For this reason, the acrylic plate 10 is generally sold with protective sheets 11 attached to both sides (front surface 10a and back surface 10b) of the acrylic plate 10. The inventors have focused on this protective sheet 11. That is, the inventors have come to the knowledge that if the manufacturing method for the acrylic plate product 1 is carried out without peeling off the protective sheet 11, it is possible to prevent the acrylic plate 10 from being scratched. Furthermore, the inventors have confirmed through experiments, etc. that even if the protective sheet 11 is attached to the acrylic plate 10, the protective sheet 11 can be removed by the abrasive material 4 during processing in the sandblasting step S5.

[0029] In the embodiment, after the mask material forming step S2, a mask material pasting step S3 is performed in which the mask material 2 is partially pasted on top of the protective sheet 11. After the mask material pasting step S3, a sandblasting step S5 is performed. After the sandblasting step S5, a peeling step S10 is performed in which the mask material 2 is peeled off together with the protective sheet 11 from the acrylic plate 10. That is, the mask material 2 is not pasted directly on the acrylic plate 10, but is pasted on top of the protective sheet 11. Therefore, when the protective sheet 11 is peeled off, the mask material 2 is peeled off together with the protective sheet 11. Therefore, it is possible to prevent the acrylic plate 10 from being scratched when the mask material 2 is peeled off.

[0030] In addition, the sandblasting step S5 is performed with the protective sheet 11 attached to the acrylic plate 10. Therefore, the abrasive material 4 sprayed toward the mask material 2 may splash onto the protective sheet 11 or the mask material 2, but will not splash directly onto the acrylic plate 10 itself other than the engraved portion. Therefore, it is possible to prevent the acrylic plate 10 from being scratched by the splashed abrasive material 4.

[0031] Furthermore, since the protective sheet 11 is attached to the acrylic plate 10, there is no need to cover at least the entire surface of the acrylic plate 10 to be engraved (rear surface 10b) with the mask material 2. This allows the size of the mask material 2 to be reduced.

[0032] In the embodiment, in the sandblasting process S5, a pattern 1c is engraved on the acrylic plate 10. Here, other methods for engraving a pattern or the like on the acrylic plate include, for example, laser processing. In addition, a technique for directly printing a pattern or the like on the acrylic plate includes, for example, UV printer technology. Note that "UV" is an abbreviation for "Ultra Violet."

[0033] First, laser processing and the processing of the sandblasting step S5 of the embodiment are compared. Laser processing requires a more expensive machine than the machine used in the sandblasting step S5 of the embodiment. In addition, when the same pattern is engraved by laser processing and the processing of the sandblasting step S5 of the embodiment, the engraving time is longer in the laser processing than in the processing of the sandblasting step S5 of the embodiment. Therefore, the sandblasting step S5 of the embodiment can reduce the manufacturing cost more than the laser processing. Furthermore, in the laser processing, the laser light is raised and lowered, and the pattern is engraved in a scanning line for each fixed width of the light of the laser light. Therefore, a slightly thin scanning line (gap) may be generated in the acrylic plate at each fixed width. In particular, when the acrylic plate is an extruded plate, the scanning line is likely to be generated on the acrylic plate. On the other hand, in the processing of the sandblasting step S5 of the embodiment, the acrylic plate 10 is engraved by the injection of the abrasive 4, so that the scanning line like that of the laser processing is not generated on the acrylic plate product 1.

[0034] Next, the printing by the UV printer and the processing of the sandblasting process S5 of the embodiment are compared. When a pattern or the like is printed directly on the acrylic plate by the UV printer, even if light is irradiated onto the pattern of the acrylic plate product, the light is blocked by the pattern. For this reason, the pattern printed by the UV printer does not appear to be luminous, so no visual effect is obtained. On the other hand, when the processing of the sandblasting process S5 of the embodiment is performed, when light is irradiated onto the pattern 1c of the acrylic plate product 1, the pattern 1c appears to be luminous, so the visual effect is enhanced. Note that, for example, the light is irradiated from the inside to the outside of the case 100 in a state in which the acrylic plate product 1 is attached to the case 100 in FIG. 1. Furthermore, in the printing by the UV printer, whether the acrylic plate is an extruded plate or a cast plate, the printed surface is easily peeled off when the surface of the printed part is scratched, regardless of whether the acrylic plate is an extruded plate or a cast plate.

[0035] In this way, the sandblasting process S5 in this embodiment is superior to laser processing and UV printer printing.

[0036] In the embodiment, after the mask material application step S3 and before the sandblasting step S5, a protective sheet covering step S41 is performed in which the entire periphery of the edge portion 11a of the protective sheet 11 applied to the acrylic plate 10 is covered with the adhesive tape 3. That is, the gap between the acrylic plate 10 and the protective sheet 11 is covered with the adhesive tape 3. Therefore, it is possible to prevent the abrasive material 4 and the like from entering through the gap between the acrylic plate 10 and the protective sheet 11.

[0037] In the embodiment, after the mask material pasting step S3 and before the sandblasting step S5, a mask material covering step S42 is performed in which the entire periphery of the edge 2a of the mask material 2 is covered with the adhesive tape 3. That is, the adhesive tape 3 covering the entire periphery of the edge 2a of the mask material 2 also covers a part of the protective sheet 11. Therefore, it is possible to further suppress the abrasive 4 from being directly sprayed onto the part of the protective sheet 11 covered by the adhesive tape 3. Even if the masking portion of the mask material 2 is insufficient, when the abrasive 4 is sprayed onto the edge part of the pattern 1c in the sandblasting step S5, the adhesive tape 3 can suppress the abrasive 4 from being directly sprayed onto the part of the protective sheet 11. In addition, it is possible to suppress the peeling of the mask material 2 from the protective sheet 11 in an unattended (natural) state.

[0038] In the embodiment, after the sandblasting step S5 and before the peeling step S10, the static electricity removal step S6, the cleaning step S7, and the drying step S8 are performed. Here, as described above, the acrylic plate 10 and the like are charged by friction. At this time, the acrylic plate 10 is more likely to generate static electricity than the glass plate. For this reason, in the embodiment, the static electricity removal step S6 is performed after the sandblasting step S5, and the static electricity of the acrylic plate 10, the mask material 2, and the like is removed. Then, in the static electricity removal step S6, compressed air is blown together with the charged ions to blow off the particles of the abrasive 4 remaining on the acrylic plate 10, the protective sheet 11, and the mask material 2, particularly the larger particles of the abrasive 4. In addition, the abrasive 4 that has been attached by the action of static electricity is also blown off by the compressed air. Furthermore, after the static electricity removal step S6, the cleaning step S7 is performed, and the abrasive 4 is washed away by running water. In the cleaning step S7, among the particles of the abrasive 4 remaining on the acrylic plate 10, the protective sheet 11, and the masking material 2, particularly the smaller particles of the abrasive 4 are washed away. In this way, the two steps of the static electricity removal step S6 and the cleaning step S7 remove the abrasive 4 of different sizes remaining on the acrylic plate 10, the protective sheet 11, and the masking material 2. In other words, the two steps of the static electricity removal step S6 and the cleaning step S7 remove the abrasive 4 regardless of the size of the particles of the abrasive 4 remaining on the acrylic plate 10, the protective sheet 11, and the masking material 2. Furthermore, after the cleaning step S7, the drying step S8 is performed to dry the adhesive of the protective sheet 11. This makes it possible to prevent the adhesive from leaving marks on the acrylic plate 10 when the protective sheet 11 is peeled off (peeling step S10). Therefore, the static electricity removal step S6, the cleaning step S7, and the drying step S8 make it possible to prevent scratches and marks on the acrylic plate 10 when the protective sheet 11 is peeled off.

[0039] In the embodiment, the bending process S9 is performed after the drying process S8. Then, the peeling process S10 is performed after the bending process S9. That is, the protective sheet 11 is attached to the acrylic plate 10 during the bending process S9. Therefore, it is possible to prevent the acrylic plate 10 from being scratched during the bending process S9. In addition, in the peeling process S10 performed after the bending process S9, the protective sheet 11, the mask material 2, and the adhesive tape 3 are peeled off.

[0040] In the embodiment, the application step S11 is performed after the peeling step S10. That is, since the static electricity removal step S6 and the cleaning step S7 are performed before the peeling step S10, the abrasives 4 of different sizes remaining on the acrylic plate 10, the protective sheet 11, and the mask material 2 are removed. Therefore, when applying the antistatic agent to the acrylic plate 10, the abrasives 4 are prevented from adhering to the sheet, and the acrylic plate 10 is prevented from being rubbed with the abrasives 4 attached to the sheet. Therefore, when applying the antistatic agent to the acrylic plate 10, it is possible to prevent the abrasives 4 from scratching the acrylic plate 10 (wiping streaks) caused by the abrasives 4.

[0041] In the embodiment, an extruded plate is used as the acrylic plate 10. The extruded plate is cheaper than a cast plate, so costs can be reduced. The extruded plate has a lower hardness than a cast plate, so it is easier to bend using heat. Therefore, the extruded plate can shorten the time for the bending process S9 compared to a cast plate. Although the cast plate has a higher hardness than an extruded plate, it is possible to bend it using heat.

[0042] As described above, the method for producing the acrylic sheet product 1 of the embodiment provides the following effects.

[0043] (1) A manufacturing method of an acrylic plate product 1 decorates an acrylic plate 10 to which a protective sheet 11 is attached. The manufacturing method of the acrylic plate product 1 includes a mask material forming step S2, a mask material attaching step S3, a sandblasting step S5, and a peeling step S10. In the mask material forming step S2, a mask material 2 having a pattern 1c to be applied to the acrylic plate 10 is formed. In the mask material attaching step S3, after the mask material forming step S2, the mask material 2 is partially attached from above the protective sheet 11. In the sandblasting step S5, after the mask material attaching step S3, an abrasive material 4 is sprayed toward the mask material 2. In the peeling step S10, after the sandblasting step S5, the mask material 2 is peeled off from the acrylic plate 10 together with the protective sheet 11. Therefore, it is possible to provide a manufacturing method of an acrylic plate product 1 that suppresses damage to the acrylic plate 10 when the mask material 2 is peeled off.

[0044] (2) A method for manufacturing an acrylic plate product 1, including a protective sheet covering step S41. In the protective sheet covering step S41, after the mask material application step S3 and before the sandblasting step S5, the entire periphery of the edge portion 11a of the protective sheet 11 applied to the acrylic plate 10 is covered with adhesive tape 3. Therefore, in addition to the effect of (1) above, it is possible to prevent abrasives 4 and the like from entering through the gap between the acrylic plate 10 and the protective sheet 11.

[0045] (3) A manufacturing method of an acrylic plate product 1, including a masking material covering step S42. In the masking material covering step S42, after the masking material attaching step S3 and before the sandblasting step S5, the entire periphery of the edge 2a of the masking material 2 is covered with adhesive tape 3. Therefore, in addition to the effects of (1) and (2) above, it is possible to further prevent the abrasive 4 from being sprayed directly onto the portion of the protective sheet 11 covered with the adhesive tape 3.

[0046] (4) A method for manufacturing an acrylic sheet product 1, comprising a static electricity removal step S6, a cleaning step S7, and a drying step S8, which are performed after the sandblasting step S5 and before the peeling step S10. In the static electricity removal step S6, charged ions are sprayed onto the acrylic sheet 10 to remove static electricity from the acrylic sheet 10. In the cleaning step S7, after the static electricity removal step S6, the acrylic sheet 10 is washed with water. In the drying step S8, after the cleaning step S7, the protective sheet 11 is dried. Therefore, in addition to the effects of (1) to (3) above, scratches and marks on the acrylic sheet 10 can be suppressed when the protective sheet 11 is peeled off.

[0047] (5) A method for manufacturing an acrylic sheet product 1, which includes a bending process S9. In the bending process S9, after the sandblasting process S5 and before the peeling process S10 (after the drying process S8 in this embodiment), the acrylic sheet 10 is bent into the shape of the case frame in Fig. 1 (a predetermined shape). Therefore, in addition to the effect of (4) above, it is possible to prevent the acrylic sheet 10 from being scratched during the bending process S9.

[0048] (6) A method for manufacturing an acrylic sheet product 1, including a coating step S11. In the coating step S11, an antistatic agent is applied to the acrylic sheet 10 after the peeling step S10. Therefore, in addition to the effects of (4) and (5) above, it is possible to prevent the acrylic sheet 10 from being scratched by the abrasive 4 when the antistatic agent is applied to the acrylic sheet 10.

[0049] Next, another modified example of the above embodiment will be described with reference to Figures 2 to 8. Note that the description of the same configuration as in the embodiment will be omitted or simplified.

[0050] The acrylic sheet product 1 in the modified example is used as, for example, a partition 200, as shown in FIG. 8. The partition 200 in the modified example is placed in a face-to-face conference room or on a desk at a reception desk. The acrylic sheet product 1 in the modified example is a portion of the partition 200 used as a splash guard. The pattern 1c is not engraved on the front surface 1a of the acrylic sheet product 1, and the pattern 1c (letters, figures, symbols, etc.) is engraved (decorated) on the back surface 1b of the acrylic sheet product 1 by sandblasting. The pattern 1c is engraved on the four corners (four corners) of the back surface 1b of the acrylic sheet product 1. The pattern 1c in FIG. 1 is a checkered pattern, but is not limited to this.

[0051] Next, a method for manufacturing the acrylic sheet product 1 will be described with reference to FIG. 2. Note that explanations of steps similar to those in the embodiment will be omitted (see FIGS. 3 to 7). Also, the partition 200 of this modified example is shipped in a flat plate-like state as the acrylic sheet 10 without undergoing the bending process S9 and the coating process S11. In the following, the product after the peeling process S10 is referred to as the "acrylic sheet product 1," and the product before the peeling process S10 is referred to as the "acrylic sheet 10." The acrylic sheet 10 is acrylic resin molded into a plate shape (extruded plate), and is transparent in the modified example.

[0052] First, the acrylic plate 10 is manufactured by one worker (one company) in the order from the cutting process S1 to the drying process S8 shown in Fig. 2. In other words, the worker does not perform the bending process S9 to the assembly process S12 on the acrylic plate 10. Then, after the drying process S8 is completed, the worker ships the acrylic plate 10 to a seller or an installer of the partition 200 (hereinafter referred to as the seller, etc.) without peeling off the protective sheet 11, the masking material 2, and the adhesive tape 3.

[0053] In the peeling step S10, after the drying step S8 and before the assembly step S12, the adhesive tape 3, the masking material 2, and the protective sheet 11 are peeled off from the acrylic plate 10 by a user of the acrylic plate 10 or an installer of the partition 200 (hereinafter referred to as the user, etc.). In the assembly step S12, after the peeling step S10, as shown in FIG. 8, the user, etc. attaches the legs 201 to the acrylic plate product 1, and the partition 200 is completed. Thus, in the modified example, the cutting step S1 to the drying step S8, the peeling step S10, and the assembly step S12 shown in FIG. 2 are performed by the worker and the user, etc. In other words, it is sufficient that the steps are performed by a plurality of people. It is preferable that the peeling step S10 is performed by the user, etc. immediately before the assembly step S12.

[0054] Next, the operation of the modified example will be described.

[0055] In the modified example, the acrylic plate product 1 has a protective sheet 11, a masking material 2, and a pattern 1c. The masking material 2 is partially attached from above the protective sheet 11. The pattern 1c is formed by spraying an abrasive material 4 toward the masking material 2. That is, the masking material 2 is not directly attached to the acrylic plate 10, but is attached from above the protective sheet 11. Therefore, when the protective sheet 11 is peeled off, the masking material 2 is peeled off together with the protective sheet 11. For example, the peeling step S10 is performed by a user of the acrylic plate 10 after the drying step S8 and before the assembly step S12. Therefore, it is possible to prevent the acrylic plate 10 from being scratched when the masking material 2 is peeled off.

[0056] In addition, the acrylic plate 10 is shipped to a seller or the like in a state in which the protective sheets 11 are attached to both sides (front surface 10a and back surface 10b) of the acrylic plate 10 by a worker. This makes it possible to prevent the acrylic plate 10 from being scratched during transportation. Also, it is possible to prevent the acrylic plate 10 from being scratched until a user or the like performs the peeling step S10.

[0057] In the modified example, the acrylic plate product 1 has an adhesive tape 3. The adhesive tape 3 covers the entire periphery of the edge 11a of the protective sheet 11 and the entire periphery of the edge 2a of the mask material 2. That is, the protective sheet 11 can be prevented from peeling off from the acrylic plate 10 in a (natural) state without human intervention during the above-mentioned transportation or until the user or the like performs the peeling step S10. Also, the mask material 2 can be prevented from peeling off from the protective sheet 11 in a (natural) state without human intervention during the above-mentioned transportation or until the user or the like performs the peeling step S10. Therefore, the protective sheet 11 and the mask material 2 can be prevented from peeling off in a (natural) state without human intervention during the above-mentioned transportation or until the user or the like performs the peeling step S10 (peeling compensation).

[0058] In addition, peeling of the protective sheet 11 and the mask material 2 can be prevented, which further prevents the acrylic plate 10 from being scratched during transportation. Also, since the entire periphery of the edge 11a of the protective sheet 11 is covered with the adhesive tape 3, scratching of the side surface 10c of the acrylic plate 10 can be prevented.

[0059] In the modified example, the pattern 1c is engraved on the four corners of the back surface 1b of the acrylic sheet product 1. Here, since the acrylic sheet 10 has a higher transparency than a glass sheet, when the acrylic sheet 10 is used for the partition 200, there is a risk that a person may touch the partition 200 or damage the partition 200 by touching the partition 200. In contrast, in the modified example, the pattern 1c is engraved on the four corners of the back surface 1b of the acrylic sheet product 1. This allows a person to recognize the external shape of the acrylic sheet product 1. Therefore, it is possible to prevent a person from touching the partition 200 or damaging the partition 200 by touching the partition 200. In addition, the pattern 1c may be engraved along the edge of the back surface 1b of the acrylic sheet product 1. As a result, a person's recognition of the external shape of the acrylic sheet product 1 is improved when the pattern 1c is engraved along the edge compared to when the pattern 1c is engraved on the four corners. In other words, a person can recognize the external shape of the acrylic sheet product 1 even more. This can further prevent people from touching the partition 200 or damaging the partition 200 by touching the partition 200. Note that the pattern 1c is not limited to being engraved at the four corners or along the edges, and may be engraved at another position, such as the center of the acrylic plate product 1. Even if the pattern 1c is engraved in this manner, it can further prevent people from touching the partition 200 or damaging the partition 200 by touching the partition 200.

[0060] As described above, the acrylic sheet product 1 of the modified example has the following advantages. The acrylic sheet product 1 can be manufactured by the same manufacturing method as that of the embodiment from the cutting step S1 to the drying step S8, thereby also achieving the advantages (1) to (4) of the embodiment.

[0061] (7) The acrylic plate 10 has a protective sheet 11, a mask material 2, and a pattern 1c. The mask material 2 is partially attached from above the protective sheet 11. The pattern 1c is formed by spraying an abrasive 4 toward the mask material 2. Therefore, it is possible to provide an acrylic plate 10 that prevents the acrylic plate 10 from being scratched when the mask material 2 is peeled off.

[0062] (8) The acrylic plate 10 has an adhesive tape 3. The adhesive tape 3 covers the entire periphery of both the edge 11a of the protective sheet 11 and the edge 2a of the mask material 2. Therefore, in addition to the effect of (7) above, peeling between the protective sheet 11 and the mask material 2 can be suppressed in an unattended (natural) state during transportation or until a user or the like performs the peeling step S10.

[0063] The manufacturing method of the acrylic sheet product 1 of the present disclosure has been described above based on examples and modifications, and the acrylic sheet 10 of the present disclosure has been described based on modifications. However, the specific configuration is not limited to these examples and modifications, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of the claims.

[0064] In the embodiment, an example in which one worker (one company) performs the cutting process S1 to the assembly process S12 has been shown, but this is not limited to this. That is, the process shown in FIG. 2 may be divided among a plurality of companies. For example, one company (or one worker) may perform the cutting process S1 to the drying process S8, and another company (or another worker) may perform the bending process S9 to the assembly process S12. In this case where the process is divided into two, the acrylic sheet 10 has the protective sheet 11, the mask material 2, the pattern 1c, and the adhesive tape 3 when transported from one company to another. In other words, the acrylic sheet 10 has the protective sheet 11, the mask material 2, the pattern 1c, and the adhesive tape 3 during transport between the drying process S8 and the bending process S9. Therefore, the effects described in (7) and (8) above can be achieved. In this case, the product manufactured by one company is an intermediate product (semi-finished product) before becoming the acrylic sheet product 1. Then, another company manufactures the intermediate acrylic sheet 10 into an acrylic sheet product 1 (final product).

[0065] In the modified example, one worker (one contractor) performs the cutting process S1 to the drying process S8, and a user performs the peeling process S10 and the assembly process S12, but this is not limited to the above. For example, if bending is required for the acrylic plate 10, a bending process S9 may be added to the worker's process. Therefore, in this example, the cutting process S1 to the peeling process S10 shown in FIG. 2 are performed by the worker and the user. Therefore, the effect of (5) of the embodiment is obtained. Also, as in the above case, the cutting process S1 to the drying process S8 and the bending process S9 may be performed by one contractor and another contractor. Even in this case, the effects described in (7) and (8) above can be achieved.

[0066] In the embodiment and the modified example, an example of the manufacturing method including the cutting step S1 has been shown, but the present invention is not limited to this. In other words, if cutting of the acrylic plate 10 is not required, the cutting step S1 may be omitted.

[0067] In the embodiment and the modified example, an example of the manufacturing method including the protective sheet covering step S41 and the mask material covering step S42 has been shown, but the present invention is not limited thereto. For example, the manufacturing method may include only one of the protective sheet covering step S41 and the mask material covering step S42. In other words, the acrylic plate 10 may have the adhesive tape 3 covering the entire circumference of at least one of the edge portion 11a of the protective sheet 11 and the edge portion 2a of the mask material 2. In the case of the manufacturing method including only the protective sheet covering step S41, at least the effects described in (1), (2), and (7) above can be achieved. In addition, in this case, among the effects described in (8) above, peeling of the protective sheet 11 can be suppressed in an unattended (natural) state during transportation or until the user (worker in the embodiment) performs the peeling step S10. In addition, in the case of the manufacturing method including only the mask material covering step S42, at least the effects described in (1), (3), and (7) above can be achieved. In addition, in this case, among the effects described in (8) above, peeling of the mask material 2 can be suppressed in an unattended (natural) state during transportation or until a user (in the embodiment, an operator) performs the peeling step S10.

[0068] In the embodiment and the modified example, the acrylic plate 10 has the protective sheet 11 attached to both the front surface 10a and the back surface 10b of the acrylic plate 10, and each step is performed without peeling off the protective sheet 11 until the peeling step S10, but the present invention is not limited to this. For example, it is sufficient that the protective sheet 11 is attached to at least one surface on which the pattern 1c is engraved (the back surface 10b in the embodiment and the modified example). Then, it is sufficient that each step is performed without peeling off the protective sheet 11 on only one surface until the peeling step S10. Therefore, the protective sheet 11 on the other surface (the front surface 10a in the embodiment) may be peeled off before the peeling step S10. In this way, even if the protective sheet 11 on the other surface is peeled off, at least the effects described in (1) to (4) and (7) above can be achieved.

[0069] In the embodiment and the modified example, the acrylic plate 10 is transparent, but the present invention is not limited to this. The acrylic plate 10 may be opaque or may have light-transmitting properties. Having light-transmitting properties means that the opposite side cannot be clearly (or completely) recognized through the acrylic plate 10. Even with such an acrylic plate 10, it is possible to prevent the worker from unintentionally scratching the plate. Therefore, at least the effects described in (1) to (4), (7), and (8) above can be achieved.

[0070] In the embodiment and the modified example, an example in which an extruded plate is used as the acrylic plate 10 has been shown, but the present invention is not limited to this. A cast plate may be used as the acrylic plate 10. As with conventional glass plates, when a masking material is directly applied to the acrylic plate, the acrylic plate may be damaged when the masking material is peeled off. For this reason, even when a cast plate is used as the acrylic plate 10, the effects described in (1) to (4), (7), and (8) above can be achieved.

[0071] In the embodiment, the acrylic sheet product 1 has the shape of the case frame in Fig. 1, but it may have other shapes. In the embodiment, the acrylic sheet 10 is bent at four places, but the acrylic sheet 10 may be bent at two places, for example. When the acrylic sheet 10 is bent at two places, the acrylic sheet product 1 can be used as a case frame for the side of a rectangular parallelepiped case, for example. When the acrylic sheet product 1 of the embodiment is used as a case frame in a flat plate state, the bending process S9 can be omitted.

[0072] In the embodiment and the modified example, the pattern 1c is not engraved on the front surface 1a of the acrylic sheet product 1, and the pattern 1c is engraved on the back surface 1b of the acrylic sheet product 1 by the sandblasting process S5, but the present invention is not limited to this. For example, the pattern 1c may be engraved on the front surface 1a of the acrylic sheet product 1, and the pattern 1c may not be engraved on the back surface 1b of the acrylic sheet product 1. In other words, the pattern 1c may be engraved on only one of the front surface 1a or the back surface 1b of the acrylic sheet product 1, or the pattern 1c may be engraved on both the front surface 1a and the back surface 1b of the acrylic sheet product 1.

[0073] In the embodiment and the above example, the bending process S9 is performed after the drying process S8, but the present invention is not limited to this. For example, the bending process S9 may be performed after the sandblasting process S5 and before the static electricity removing process S6 in the embodiment. In other words, the bending process S9 may be performed after the sandblasting process S5 and before the peeling process S10. Even if the acrylic sheet product 1 is manufactured in such an order, the effect described in (5) above can be achieved. Note that even if the bending process S9 is performed after the sandblasting process S5 and before the peeling process S10, the coating process S11 is performed after the static electricity removing process S6, the cleaning process S7, the drying process S8, and the peeling process S10.

[0074] In the embodiment and the modified example, the manufacturing method of the acrylic sheet product 1 of the present disclosure is applied to a method of performing a plurality of steps shown in Fig. 2, but is not limited thereto. In short, the manufacturing method of the acrylic sheet product 1 of the present disclosure may be applied to manufacturing methods of other acrylic sheet products as long as the manufacturing method includes the mask material forming step S2, the mask material attaching step S3, the sandblasting step S5, and the peeling step S10. Even if applied to manufacturing methods of other acrylic sheet products, at least the effect described in (1) above can be achieved.

[0075] In the modified example, the acrylic plate 10 of the present disclosure is applied to the partition 200, but the present disclosure is not limited to this. In short, the acrylic plate 10 of the present disclosure may be applied to other acrylic plates as long as it has the protective sheet 11, the mask material 2, and the pattern 1c. Even when applied to other acrylic plates 10, at least the effect described in (7) above can be achieved. [Explanation of symbols]

[0076] 1. Acrylic sheet products 1a Surface of acrylic sheet products 1b Back side of acrylic sheet product 1c Design 10 Acrylic plate 10a Surface of the acrylic plate 10b Back side of acrylic plate 11 Protective sheet 11a Edge of protective sheet 2 Masking material 2a Edge of mask material 21 Hole 3. Adhesive tape (masking tape) 4 Abrasive material

Claims

1. A method for manufacturing an acrylic plate product by decorating an acrylic plate having a protective sheet attached thereto, comprising: a mask material forming step of forming a mask material having a pattern to be applied to the acrylic plate; a mask material application step of partially applying the mask material onto the protective sheet after the mask material formation step; a sandblasting step of spraying an abrasive material toward the mask material after the mask material pasting step; a static electricity removing step of removing static electricity from the acrylic plate by spraying charged ions onto the acrylic plate after the sandblasting step; a cleaning step of cleaning the acrylic plate with water after the static electricity removing step; a drying step of drying the protective sheet after the cleaning step; a peeling step of peeling off the mask material together with the protective sheet from the acrylic plate after the drying step; A method for producing an acrylic sheet product, comprising:

2. A method for producing an acrylic sheet product according to claim 1, A method for manufacturing an acrylic plate product, comprising the steps of: after the mask material application step and before the sandblasting step, covering the entire periphery of the edge of the protective sheet applied to the acrylic plate with adhesive tape.

3. A method for producing an acrylic sheet product according to claim 1 or 2, A method for manufacturing an acrylic sheet product, comprising the steps of: covering the entire periphery of the edge of the mask material with adhesive tape after the mask material application step and before the sandblasting step.

4. A method for producing an acrylic sheet product according to any one of claims 1 to 3, A method for manufacturing an acrylic sheet product, comprising the steps of: bending the acrylic sheet into a predetermined shape after the sandblasting step and before the peeling step.

5. A method for producing an acrylic sheet product according to any one of claims 1 to 4, A method for producing an acrylic plate product, comprising the steps of: applying an antistatic agent to the acrylic plate after the peeling step.

Images