JP2009022851A - Masking fixture, masking device using this masking fixture and manufacturing method of masking fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new masking fixture which can not only effectively avoid the risk of injuring a resin molded product to be masked, by the device or when the molded product is unloaded, but also help mass-produce an identical kind of the molded product at extremely low price, and a masking device using this masking fixture and a manufacturing method of the masking fixture. <P>SOLUTION: This masking fixture is designed for covering the resin molded product in the way that a metallic film or a coating material can deposit on only a part of the resin molded product. In addition, the masking fixture is made of a resin as a material and is molded by a molding die for the resin fixture manufactured after the shape of the resin molded product. Further, the fixture is equipped with a first frame part (the outside of a parting ridge 16) which covers the resin molded product and is molded in the shape of a frame, and a second frame part (a continuous outer peripheral side crossing the mask surface 17) which spreads larger than the first frame part. Besides, the region extending to the second frame part from the first frame part, serves as an inclined guide plane for easy guiding so as to enable covering of the resin molded product with the first frame part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a masking jig used for covering a resin molded product so that a metal film or paint is attached to only a part of the resin molded product, a masking apparatus using the masking jig, and a method for manufacturing the masking jig. It is about.

  The masking jig is formed with an opening corresponding to a metal film adhering portion or a paint adhering portion of a resin molded product (hereinafter referred to as a workpiece) such as a lens or a decorative frame, which is a vehicle lighting fixture component. There is one that masks the periphery of the opening (the non-adhered part to which the metal film or paint is not attached). The masking jig is manufactured by, for example, bending or punching a metal plate to form a sheet metal, and hand-finishing a parting portion to form the opening portion and the surrounding mask portion. The sheet metal masking jig was manufactured by welding or striking to the jig frame.

  And since the workpiece | work manufactured using the said masking jig | tool is mass-produced goods, many masking jig | tools are often used about the same kind. However, in the manufacture of the above-described masking jig made of sheet metal, since the sheet metal processing and the hand finishing are manual operations, the masking property (matching of the masking jig to the shape of the workpiece) is poor and the surface of the workpiece is scratched. There was a problem that it was easy to attach, and it took a long time to manufacture the masking jig, and its manufacturing cost was expensive. Furthermore, since all of them are manually processed, there is a problem that the mass production of the masking jig cannot be performed and the quality (processing accuracy) of the plurality of masking jigs cannot be made uniform.

  In order to solve these problems, for example, a coating masking jig and a manufacturing method thereof, which are injection molding molds that match the shape of the workpiece that is the object to be coated (using three-dimensional data of the workpiece) A mask body made of metal or an alloy formed by metal machining), a sheet metal body made of a sheet metal attached to a part of the mask body, and a clamp body formed on the sheet metal body for clamping the workpiece The mask body is configured to cover the non-coating surface of the workpiece, and the mask body is made of a magnesium alloy (see Patent Document 1).

  In this configuration, the mask body is a metal or an alloy that is metal-molded by an injection mold that matches the shape of the workpiece, so that mass production of masking jigs is possible and the quality (processing accuracy of multiple masking jigs) ) Can be maintained.

JP-A-2005-324103

  However, in the above-described masking jig, since the mask body is a metal-molded metal or alloy, particularly when the workpiece is a resin molded product that is softer than the metal or alloy, the surface of the workpiece is scratched. There was a problem that it was easy to stick. In addition, since the mask body is metal-molded with an injection mold machined to the shape of the workpiece, it takes a long time to manufacture the injection mold, and the masking jig There was a problem that the manufacturing cost of the was expensive. In addition, an expensive mold manufacturing cost is required each time a new injection mold is manufactured in accordance with a change in the shape of the workpiece or the surface treatment region.

  Therefore, the present invention has been proposed to solve the problems of the conventional masking jig described above, and there is a risk that the resin molded product to be masked may be damaged when being mounted or removed. The present invention provides a novel masking jig, a masking apparatus using the masking jig, and a method for manufacturing the masking jig, which can effectively avoid the property and can mass-produce the same product at a very low cost. With the goal.

  In order to achieve the above-described object, the masking jig according to the first invention (the invention according to claim 1) covers the resin molded product so that the metal film or the paint is attached to only a part of the resin molded product. A masking jig is characterized in that it is made of a resin as a raw material and is molded by a resin jig molding die manufactured in the shape of the resin molded product.

  In the first invention, since the masking jig is made of resin, it is possible to effectively prevent the risk of scratching the resin molded product when the resin molded product is mounted. Further, since the masking jig is formed in a shape that follows the resin jig forming die, the masking jig having the same shape can be mass-produced. Therefore, it is possible to effectively avoid a situation in which the quality of masking differs for each masking jig. In addition, since the jig mold for manufacturing the masking jig is a resin jig mold, it can be manufactured at a much lower cost than an injection mold made of metal. A jig forming die for manufacturing a new masking jig in accordance with the change of the shape of the workpiece or the surface treatment region can also be manufactured at a low cost.

  The resin that is the material of the resin jig mold can be a hard resin or a soft resin. However, in consideration of the possibility that a highly accurate masking jig cannot be manufactured due to the thickness of the resin jig mold or the directionality at the time of molding, etc., as the hardness, the soft shore hardness HS40 The degree is preferred. In addition, the resin jig mold has excellent transferability (copyability) in which the shape of the molded portion of the resin jig mold is faithfully transferred to the masking jig (molded product). In addition, it is desirable that the releasability when removing the masking jig from the resin jig mold is excellent, and a silicone rubber is preferable as a resin material that satisfies these.

  Also, the type of resin that is the material of the masking jig can be either a hard resin or a soft resin. However, from the viewpoint of preventing damage to the resin molded product to which the metal film or paint is attached and from the viewpoint of increasing the masking accuracy by being in close contact with the surface of the resin molded product, it is preferably a soft resin, Considering the deterioration of masking accuracy due to sagging due to its own weight, depending on the direction in which the masking jig is installed and the degree of partial thickness, in order to increase the accuracy of the boundary where the metal film or paint adheres, It is preferable that the resin is slightly harder than the resin. Therefore, in order to increase the masking accuracy, it is preferable that the Shore hardness is HS70-99. In addition, depending on the metal film or paint to be attached, the material and the masking jig may react and may deteriorate or deform. Therefore, chemical resistance, wear resistance, mechanical strength, impact strength, weather resistance It is preferable to use a resin comprising

  Further, according to a second invention (invention according to claim 2), in the first invention, the first frame portion that covers the resin molded product and is formed into a frame shape, and the first frame portion. A second frame portion that extends from the first frame portion to the second frame portion so that the resin molded product is covered with the first frame portion. It is characterized in that it is a guide surface that is inclined to guide.

  In the second aspect of the invention, the portion from the first frame portion to the second frame portion is a guide surface that is inclined to guide the resin molded product. Therefore, anyone can mask the resin molded product without scratching it without requiring skill.

  A third invention (invention according to claim 3) is characterized in that, in any one of the first and second inventions, the resin as the material is a urethane resin.

  In this third invention, the urethane resin has a wide range depending on the combination of the polyol and the polyisocyanate, or the blending amount of these materials and water, and further the amount filled in the resin jig mold. Hardness (preferably Shore hardness HS70-99) can be selected, it is easy to obtain moderate elasticity, and there is a risk that the resin molded product will be damaged when the resin molded product is attached to or removed from the masking jig. In addition to being able to effectively avoid, chemical resistance, wear resistance, mechanical strength, impact strength, weather resistance, and low cost. In addition, since the urethane resin is a liquid resin, it is possible to simplify the injection molding in which the urethane resin is injected and molded.

  A masking device according to a fourth invention (invention of claim 4) is detachably fixed to a plate, a plurality of openings formed in the plate, and the front side of each opening of the plate. A resin molded product that is partially covered by the masking jig passes through the opening from the back side of the plate and passes through the opening. It is characterized by being attached to each tool.

  In the masking apparatus according to the fourth aspect of the invention, the masking jig is fixed to the front side of the plurality of openings formed in the plate. Therefore, if one of the plurality of masking jigs is damaged, Only the masking jig that has been used can be easily replaced with a new masking jig, and the entire masking device does not have to be remanufactured.

  A masking jig manufacturing method according to a fifth invention (invention according to claim 5) is the masking jig manufacturing method according to any one of claims 1, 2, or 3, and is partially made of metal. A mold making process for creating a resin jig mold in accordance with the shape of a resin molded product to which a film or paint is applied, and filling the resin in the resin jig mold created by this mold creating process The resin filling step and a demolding step of demolding from the resin jig mold after the resin filled in the resin filling step is cured.

  In the fifth aspect of the invention, a resin jig mold is created in the shape of a resin molded product to which a metal film or paint is partially attached, and the resin is filled in the resin jig mold. Then, the masking jig is molded, and after the molded resin is cured, the mask is removed from the resin jig mold, so that it can be manufactured in a short time and at a low cost. That is, unlike the conventional injection molding die by machining, it does not require a long time for manufacturing the jig molding die, so that it can be made inexpensive. Further, since the masking jig made of a resin material is molded by a resin jig molding die, the masking jig can be mass-produced and the quality (processing accuracy) of a plurality of masking jigs can be maintained.

  In the first invention (the invention according to claim 1), since the masking jig is made of resin, it is possible to effectively prevent the risk of scratches when a resin molded product is mounted on the masking jig. The quality of the resin molded product can be improved. In addition, since the masking jig is molded by a resin jig mold, the masking jig having the same shape can be mass-produced and can contribute to mass production of resin molded products. Moreover, since the jig | tool shaping | molding die which manufactures a masking jig | tool is a resin jig shaping | molding die, it can manufacture cheaply and can aim at reduction of manufacturing cost.

  In the second invention (the invention described in claim 2), the portion from the first frame portion to the second frame portion is a guide surface that is inclined to guide the resin molded product. Since the resin molded product is guided by the guide surface and attached to the first frame portion, anyone can mask the resin molded product without scratching without requiring skill, improving the quality. Can be achieved.

  In the third invention (the invention described in claim 3), the urethane resin can be selected from a wide range of hardness, so that appropriate elasticity can be easily obtained, and the resin molded product is attached to or removed from the masking jig. In this case, since it becomes possible to effectively avoid the risk of the resin molded product being damaged, the quality of the resin molded product can be improved. In addition, since the urethane resin is a liquid resin, injection molding can be easily performed, so that mass production of the masking jig can be facilitated, and the manufacturing cost can be reduced by an inexpensive resin jig molding die.

  In the masking device of the fourth invention (invention of claim 4), the masking jig is fixed to the front side of the plurality of openings formed in the plate, so that one of the plurality of masking jigs is provided. When one of the masks is damaged, only the damaged masking jig can be easily replaced with a new masking jig, and the entire masking device does not need to be remanufactured and can be repaired at low cost. .

  In the masking jig manufacturing method of the fifth invention (invention of claim 5), the resin is molded into a resin jig mold, the masking jig is molded, and the molded resin is cured. Then, since the mold is removed from the resin jig mold, it can be manufactured at a low cost in a short time, and the manufacturing cost can be reduced. In addition, since the resin material masking jig is molded by the resin jig mold, it is possible to mass-produce the masking jig. Since the quality (processing accuracy) can be maintained, the quality of the resin molded product can be improved.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode of a masking jig for carrying out the present invention, a masking apparatus using the masking jig, and a method for manufacturing the masking jig will be described in detail with reference to the drawings.

  First, a masking apparatus 1 using a masking jig 10 for attaching a metal film to only a part of a workpiece (resin molded product) 30 by surface treatment such as vacuum deposition or plating (hereinafter referred to as plating) is illustrated in FIG. A description will be given with reference to FIGS. As shown in FIG. 2, the masking device 1 includes a plate 2 which is a substrate of the device, and its edge portion 2a is bent in an L shape to the front side (the lower surface side in FIG. 2). A reinforcing member 4 having a rectangular cross section and a rectangular frame shape is fixed to the corner portion, and the plate 2 is reinforced so as not to be bent. The two left and right openings 3, 3 having a larger diameter than the upper end opening diameter of each guide surface 18 of the tool 10, 10 are formed in the same shape.

  In the masking apparatus 1 according to the present embodiment, masking jigs 10 and 10 made of the same components are arranged in the vicinity of the two left and right openings 3 and 3 formed in the same shape. In addition, since two sets of work holding members 20, 20 and 20, 20 made up of the same components are arranged, in the following description, each of the two left and right openings 3, 3 The same reference numerals are given to the constituent elements in the vicinity of each other, and the description of each constituent element will be made only on the constituent elements arranged in the vicinity of one of the two left and right openings 3 and 3.

  A masking jig 10 for masking a non-plated portion of the work 30 to be described later is provided in the vicinity of the opening 3 and on the front side of the plate 2 (the lower surface side in FIG. 2). , 5, 5 (see FIG. 3). A mask surface 17 for masking the non-plated portion of the work 30 is formed on the back side (the upper surface side in FIG. 2) of the masking jig 10 so as to be in close contact with the non-plated portion of the work 30. Is for holding the work 30 placed on the mask surface 17 and masking (covering) a non-plated portion of the work 30 in contact with the mask surface 17.

  Further, two sets of work holding members 20 and 20 for holding the work 30 placed on the mask surface 17 of the masking jig 10 are arranged on the other back side (the upper surface side in FIG. 2) of the plate 2. ing. Each of these work holding members 20, 20 has the same configuration, and as shown in FIG. 1 or 2, a bridge pier 21 is fixed to the back side of the plate 2, and the bridge plate 21 a of the bridge pier 21 has a bridge plate 21 a. The bolts 23 are respectively erected by sandwiching the beam plate portion 21a by the nuts 22A and 22B screwed together.

  The bolts 23 are respectively inserted with L-shaped retainers 24 that can be moved up and down, and cylinders that can be moved up and down by being guided by the head 23a of the bolts 23 on the top surface of the retainers 24. Each of the tab-like knob members 25 is fixed. Coil springs 26 are respectively inserted between the upper surface of the retainer 24 in the knob 25 and the lower surface of the head 23a of the bolt 23, and the retainer 24 and the knob 25 are biased downward by the coil spring 26, respectively. Has been. Due to the urging force of the coil spring 26, the lower end of the pressing portion 24a of the retainer 24 presses the end face of the fixing projection 36 (see FIG. 10B) of the work 30, which will be described later, and holds the work 30.

  As a preparation for mounting the workpiece 30 before plating on the masking device 1, the gripping members 25 of the workpiece holding members 20, 20 are gripped in FIG. 1, the pressing portion 24 a of the retainer 24 is rotated outside the opening 3 of the plate 2 to a rotation position of about 90 degrees indicated by a two-dot chain line in FIG. The upward lifting is released, and the retainers 24 of the workpiece holding members 20 and 20 are fixed at the rotation position of about 90 degrees.

  Thereafter, when mounting the workpiece 30 before plating, the opening 30 is passed from the back side of the plate 2 with the front side of the workpiece 30 facing down, and the workpiece 30 is guided on the back side of the masking jig 10. 18 is lowered and placed so as to be in close contact with the mask surface 17. Thereafter, in order to fix the placed work 30, the pressing portion 24 a of each retainer 24 is moved above the fixing protrusion 36 of the work 30 while lifting the knob members 25 of the work holding members 20, 20 upward. And the upward lifting of the respective knob members 25 is released. With this opening, the presser foot 24 is urged downward by the coil spring 26, and the work 30 is mounted so as to be in close contact with the mask surface 17 of the masking jig 10.

  By the way, the workpiece | work 30 with which the masking jig | tool 10 is mounted | worn and plating only a part is a resin-molded lighting fixture component for vehicles, The planar shape is shown to Fig.10 (a). As shown in FIG. 10 (b), the cross-sectional shape of the first inclined portion 31 having the first inclined surface 31a descending from the outer periphery toward the center side is formed. The second inclined portion 32 having the second inclined surface 32a rising from the lower end of the first inclined surface 31a toward the center side, and the first inclined surface 31a and the second inclined surface 32a A quadrangular frame shape comprising: a crossing concave corner portion 33 of a crossing corner portion; and a third inclined portion 34 having a third inclined surface 34a descending from the upper end of the second inclined surface 32a toward the center side. It is molded into.

  In addition, a rib 35A is bridged between the left and right lower ends of the third inclined portion 34 in the work 30, and a plurality of ribs 35B, 35C having different shapes are also formed outside the rib 35A. 35D is bridged (see FIG. 10A). Further, two fixing projections 36 and 36 for fixing the work 30 to the vehicle are provided on the back side of the ribs 35A, 35B, 35C, and 35D (the lower surface side in FIG. 10B). Yes.

  And the plating process to the workpiece | work 30 is given to the front side (upper surface side of FIG.10 (b)) of this workpiece | work 30, and the plating range is the center which made the cross recessed corner | angular part 33 of the workpiece | work 30 the boundary (parting). The second inclined surface 32a, the third inclined surface 34a, and the front surfaces of the plurality of ribs 35A, 35B, 35C, 35D are plated, and the intersecting concave corner portion 33 is bounded (partially cut off). The first inclined surface 31a in the range of the non-plated portion Mb on the outer peripheral side is not plated. Therefore, if the first inclined surface 31a that is the range of the non-plated portion Mb of the workpiece 30 is masked by the masking jig 10 shown in FIG. 4 to be described later, only the range of the plated portion Ma is plated. The parting ridge 16 that is the boundary between the non-plated portion and the plated portion may have the same ridge line shape as the cross recessed corner portion 33 of the work 30.

  Next, the masking jig 10 for masking the non-plated portion of the workpiece 30 will be described with reference to FIG. The masking jig 10 is formed using a urethane elastomer urethane resin, which is a resin material, and its cross-sectional shape is substantially similar to the inner and outer peripheries shown in FIG. 10 of the workpiece 30 as shown in FIG. A cylindrical portion 13 composed of the peripheral surface 11 and the outer peripheral surface 12 is formed, and a flange portion 15 is formed on the upper surface 14 side (the back surface side of the present invention) of the outer peripheral surface 12. A parting edge 16 that forms the boundary between the plated portion and the non-plated portion is imitated at the upper end of the inner peripheral surface 11 by the intersecting recessed corner portion 33 so as to engage with the intersecting recessed corner portion 33 of the work 30. A mask surface 17 that protrudes and inclines while descending from the parting edge 16 toward the outer peripheral side is provided on the outside of the parting edge 16 (the first frame portion of the present invention). In order to form a non-plated portion in close contact with the surface 31a, the first inclined surface 31a is formed so as to be imitated (see FIG. 2).

  Further, on the outer peripheral side (second frame portion of the present invention) that intersects and continues with the mask surface 17, the opening is inclined while rising toward the outer peripheral side, and the opening intersects with the upper surface 14 (reference numerals are omitted). The guide surface 18 having a smaller diameter than the opening of the plate 2 shown in FIG. 1 or 2 is formed to be inclined so as to guide the work 30. Further, the opening in the inner peripheral surface 11 is an opening for allowing the plating raw material to pass when plating is performed on the front side (lower surface side) of the work 30 mounted on the mask surface 17 shown in FIG. Thus, it is formed into an inclined surface that descends from the parting edge 16 toward the outer peripheral side. Further, bolt holes 19, 19, 19, 19 for fixing to the plate 2 of the masking device 1 shown in FIGS. 1 to 2 are formed at the four corners of the flange portion 15.

  Next, a method for manufacturing the masking jig 10 will be described with reference to FIGS. The manufacturing method of the masking jig 10 includes a mold creation step (first to ninth steps) for creating a resin jig molding die in the shape of the plated portion and the non-plated portion of the workpiece 30; A resin filling step (tenth route) of filling the resin, which is a raw material of the masking jig 10, into the jig forming die created by the die making step, and the resin filled by the resin filling step is cured. And a demolding step (eleventh routing) for demolding the masking jig 10 molded from the jig mold.

  First, as a preliminary preparation for starting the mold creating process, the third inclined portion 34, the ribs 35A, 35B, 35C, and 35D and the fixing protrusions 36 and 36 shown in FIG. An exemplary work 30K shown in FIG. 5 including the first inclined portion 31 and the second inclined portion 32 is prepared by cutting in advance. The workpiece 30K shown in FIG. 5 is illustrated with a simplified shape for easy understanding.

Then, in the first routing, as shown in FIG. 6, the guide surface 18 (see FIG. 4B) of the masking jig 10 is formed on the back surface 31b of the first inclined portion 31 of the model work 30K. A middle frame body 41 formed with an inclined surface 41b whose diameter is expanded downward as much as possible is affixed. The first mold member D <b> 1 is formed by filling the space 42 between them with the filling material 42. In addition, the 1st inclined surface 31a of the workpiece | work 30K which comprises this 1st type | mold member D1 is an inclined surface used as the base which shape | molds the mask surface 17 of the masking jig | tool 10 shown in FIG.4 (b).
It is.

  In the next second operation sequence, as shown in FIG. 7A, a mold frame in which a box frame body 45 is placed on a floor plate 44 is prepared, and the first mold member D1 is placed on the floor plate 44. A molding space 46 is formed by placing one surface 42a.

  In the next third route, as shown in FIG. 7B, the molding space 46 shown in FIG. 7A is filled with a liquid resin of silicone rubber mixed with a curing agent, and filled. The upper lid 48 is placed on the box frame 45 and pressed, and allowed to stand for 12 hours or more at room temperature to be cured, thereby forming the second mold member D2.

  In the next fourth operation sequence, after removing the upper lid 48 from the state shown in FIG. 7B, the first mold member D1 and the second mold member D2 are accommodated in the box frame 45. Placed on the floor plate 44 upside down, the first mold member D1 is removed from the second mold member D2 to form a molding space 49, as shown in FIG. 7C. The inclined surface D2a of the second mold member D2 is an inclined surface that is a basis for forming the guide surface 18 of the masking jig 10 shown in FIG. 4B, and the inclined surface D2b It is an inclined surface that is a basis for molding.

  In the next fifth route, as shown in FIG. 8 (a), a silicone rubber liquid resin mixed with a curing agent is formed in the molding space 49 of the second mold member D2 shown in FIG. 7 (c). In addition to filling and filling, the upper lid 48 is placed on the box frame 45 and pressed, and allowed to stand at room temperature for 12 hours or more to be cured to form the third mold member D3.

  In the next sixth operation sequence, after removing the upper lid 48 from the state shown in FIG. 8A, the third mold member D3 is removed from the second mold member D2, and shown in FIG. 8B. As described above, the outer peripheral side meat portion D3a existing outside the inclined surface D4c connecting the convex corner portion D4a and the convex corner portion D4b of the third die member D3 is cut out, and the core D4 as the fourth die member. Form. The convex corner portion D4a of the fourth mold member D4 is a position where the parting ridge 16 of the masking jig 10 shown in FIG.

  In the next seventh operation sequence, as shown in FIG. 8 (c), the above-mentioned middle is placed on the recess D2c of the molding space 49 (see FIG. 7 (c)) after the third mold member D3 is removed. One core D4d of the child D4 is engaged to place the core D4, and a molding space 50 is formed. That is, in the next work order, the fifth mold member D5 shown in FIG. 9A is not released from the core D4, and therefore the release agent is not applied to the surface on the core D4 side.

  In the next eighth route, as shown in FIG. 9A, the molding space 50 shown in FIG. 8C is filled with a liquid resin of silicone rubber mixed with a curing agent, The upper lid 48 is placed on the box frame 45 and pressed, and left to harden at room temperature for 12 hours or more to form the fifth mold member D5 integrally with the core D4.

  In the next ninth operation sequence, after removing the upper lid 48 from the state shown in FIG. 9A, the core D4 and the fifth mold member D5 are removed from the second mold member D2, and As shown in FIG. 9B, a mold frame in which a box frame body 52 is placed on a floor plate 51 is prepared. On the floor plate 51, the core D4 and the fifth mold member D5 are placed with the other surface D4e of the core D4 as the lower surface, and the one surface D4d of the core D4 is made of silicone rubber. The sixth mold member D6 is removably added. The inclined surface D6b of the sixth mold member D6 increases in diameter from the convex corner portion D4a of the core D4 toward the convex corner portion D6a of the sixth mold member D6, and the masking treatment shown in FIG. The inner peripheral surface 11 of the tool 10 is formed to be molded.

  Also, a seventh mold member D7 made of silicone rubber for forming the flange portion 15 of the masking jig 10 shown in FIG. 4B is accommodated inside the box frame 52 shown in FIG. 9B. Has been. The inner peripheral surface D7a of the seventh mold member D7 forms the outer peripheral surface 12 of the masking jig 10, the lower surface D7b forms the lower surface 15a of the flange portion 15 of the masking jig 10, and the protrusion D7c The four bolt holes 19 of the masking jig 10 are respectively formed to be molded.

  Then, in the above-described mold making process, a resin-made jig molding die made of silicone rubber with the fifth mold member D5, the sixth mold member D6, and the seventh mold member D7 (reference numerals are omitted). However, the masking jig 10 shown in FIG. 4B is formed by a molding space 54 that is housed in a box made up of a floor plate 51, a box frame 52, and an upper lid 53 described later. That is, the mask surface 17 is formed by the inclined surface D5a of the fifth mold member D5, the guide surface 18 is formed by the inclined surface D5b, and the inner peripheral surface 11 is formed by the inclined surface D6b of the sixth mold member D6. The outer peripheral surface 12 is formed by the inner peripheral surface D7a of the seventh mold member D7, and the lower surface D7b is formed by the inner corner portion D5c formed by intersecting the inclined surface D5a and the inclined surface D6b while forming the lower surface 15a of the flange portion 15. A parting edge 16 is formed.

  In the resin filling step of the next tenth route, as shown in FIG. 9 (c), in the molding space 54 formed in the jig forming die shown in FIG. 9 (b) by the previous ninth step. A liquid resin of urethane elastomer, which is a urethane resin, is injected and filled, and an upper lid 53 is placed on the box frame 52 and pressed, and cured by heating at about 70 ° C. for about 60 minutes to masking treatment. The tool 10 is molded. The liquid resin of urethane elastomer that is a molding material of the masking jig 10 is prepared by mixing polyol and polyisocyanate, and does not mix water that reacts with polyisocyanate and foams.

  Note that the fifth mold member D5, the sixth mold member D6, and the seventh mold member D7 constituting the jig mold for molding the masking jig 10 are each made of a release material. Since it is made of excellent silicone rubber, it is not necessary to apply a release agent to each molding surface prior to the injection of the urethane elastomer, and it can be easily removed even if it is directly injected.

  In the next demolding step of the eleventh routing, the upper lid 53, the sixth mold member D6 and the seventh mold member D7 were removed from the jig mold from the state shown in FIG. The subsequent masking jig 10 is removed from the jig mold. The removed masking jig 10 is formed in the shape shown in FIG. 4, but when a burr is produced in part, it is smoothed and finished.

  Next, a procedure for plating the workpiece 30 by the masking apparatus 1 using the masking jig 10 will be described with reference to FIGS. When plating the workpiece 30, the mask surface 17 of the masking jig 10 is previously opposed to one opening 3 of the plate 2 on the front side (lower surface side in the drawing) of the plate 2 shown in FIG. While fixing with four bolts 5, 5, 5, and 5 (see FIG. 3), the work holding member 20 is rotated to a position indicated by a two-dot chain line outside one opening 3 shown in FIG. The back side of one opening 3 is opened.

  The workpiece 30 for plating passes through one opening 3 from the back side of the plate 2 while the first inclined surface 31a is opposed to the mask surface 17 of the masking jig 10, and the workpiece 30 is The mask 30 is lowered along the guide surface 18 on the back side of the masking jig 10, and the first inclined surface 31 a of the work 30 is placed in close contact with the mask surface 17. Thereafter, the work holding member 20 is rotated so that the pressing portion 24 a of the retainer 24 is brought into contact with the fixing protrusion 36 of the work 30, and the work 30 is moved to the mask of the masking jig 10 by the bias of the coil spring 26. It is mounted so as to be in close contact with the surface 17. Note that the same procedure is used when the masking jig 10 and the workpiece 30 are mounted in the vicinity of the other opening 3.

  When the workpiece 30 mounted as described above is plated by, for example, vacuum deposition, the front side (the lower surface side in FIG. 2) of the masking jig 10 mounted on the masking apparatus 1 is not shown. The masking device 1 is placed above a vacuum vapor deposition apparatus (not shown) so as to face the raw material side of the film, and the vacuum vapor deposition apparatus is evacuated and the plating film raw material is heated and evaporated. By this evaporation, the raw material becomes gas molecules, and the gas molecules pass through the inner peripheral surface 11 of the masking jig 10 shown in FIG. 2 and collide with the front side of the work 30 to adhere the plating film.

  Here, since the first inclined surface 31a of the workpiece 30 is masked by the mask surface 17 with the parting edge 16 of the masking jig 10 as a boundary, it becomes a non-plated portion Mb shown in FIG. The plating portion Ma (the second inclined surface 32a, the third inclined surface 34a and the ribs 35A, 35B, 35C, and 35D) on the center side of the parting edge 16 has nothing to block the gas molecules of the raw material. Plating is applied.

  Next, the effect of the masking jig 10 having the above-described configuration will be described. In this masking jig 10, the parting edge 16 shown in FIG. 4B, which forms the boundary (parting) between the plated part and the non-plated part on the work 30, is the crossing angle of the work 30 shown in FIG. 10B. Since the projections are formed so as to be engaged with the portion 33 so as to be engaged with the portion 33, the boundary (parting) between the plated portion and the non-plated portion can be formed with high accuracy. In addition, since the guide surface 18 that is inclined while rising toward the outer peripheral side is formed on the outer peripheral side that intersects with the mask surface 17 shown in FIG. 4B, the work 30 before plating is mounted. In doing so, it can be lowered along the guide surface 18 and can be placed on the mask surface 17 and masked by anybody without scratching the work 30 without skill.

  Further, since the masking jig 10 is formed by a jig mold, the masking jig having the same shape can be mass-produced. Further, since the masking jig 10 is made of urethane elastomer, it is excellent in mechanical strength, chemical resistance, impact strength, and moldability (can be molded in a complicated shape), and is a workpiece 30 to be plated. It is possible to deal with mass production and to effectively prevent the risk of scratching the work 30 of the resin molded product when the work 30 is mounted. In addition, urethane elastomers can be selected from a wide range of hardness depending on the combination of polyol and polyisocyanate, making it easy to obtain the desired elasticity, and because it is a liquid resin, it can be easily molded into a jig mold. It can be made cheaper than vacuum molding, injection molding, and the like.

  Next, the function and effect of the masking device 1 will be described. As shown in FIGS. 1 to 3, the masking jigs 10, 10 of the masking apparatus 1 have two left and right openings 3, 3 formed in the same shape on the plate 2, and the front side of these openings 3, 3. Masking jigs 10 and 10 made of the same constituent elements are arranged on the lower surface side of FIG. 2, and two sets of work holding members 20 and 20 and 20, 20 made of the same constituent elements are arranged. Therefore, when one of the two masking jigs 10 and 10 is damaged, only the masking jig 10 on the damaged side is easily replaced with a new masking jig 10 for use. This eliminates the need to remanufacture the entire masking device. In addition, since the two masking jigs 10 and 10 are provided, it is possible to contribute to the mass production of the plating process on the work 30 and to plate different kinds of works by combining different kinds of masking jigs. Processing can be done simultaneously.

  As described in the above embodiment, the resin jig forming mold used in the masking jig manufacturing process is formed by the first to fourth mold members D1, D2, D3, and D4. Since the first to fourth mold members D1, D2, D3, and D4 are made of resin (silicone rubber), the jig mold can be manufactured in a short time. That is, the masking jigs 10 and 10 are made of resin, and are molded by a resin jig mold that is manufactured in the shape of the workpiece 30. The resin jig mold is The jig is molded in a short time since it is molded by a plurality of (first to fourth mold members D1, D2, D3, D4) made of a resin manufactured in the shape of the resin molded product. A mold can be manufactured.

  Next, the effect concerning the manufacturing method of the masking jig | tool 10 is demonstrated. The resin-made jig molds created in the mold creation process (first to ninth steps) are the fifth mold member D5 and sixth mold member shown in FIG. Since D6 and the seventh mold member D7 are made of silicone rubber, a masking jig having a complicated shape can be easily formed because the transfer material is excellent when forming the workpiece 30, and the workpiece 30 is removed from the mold. Since it is excellent in release, there is no need to apply a release agent to each molding surface prior to the injection of the urethane elastomer, and the working time can be shortened.

  In the present embodiment, the case where the surface of the resin molded product is plated has been described. However, the masking jig according to the present invention, the masking apparatus using the masking jig, and the manufacturing method of the masking jig, The present invention can also be applied when coating the surface of a resin molded product.

It is a top view which shows the back side of the masking apparatus which concerns on embodiment of this invention. It is AA sectional drawing of the masking apparatus shown in FIG. It is a bottom view of FIG. 2, and shows the front side of a masking apparatus. The masking jig | tool is shown, (a) is a top view which shows the back side, (b) is BB sectional drawing of (a), (c) is a bottom view of (b), and shows the front side. It is a simplification figure showing a work (resin molding), (a) is a top view and (b) is a sectional view. It is explanatory drawing which concerns on the manufacturing method of a masking jig | tool, Comprising: It is sectional drawing which shows the 1st process order in a type | mold production process. FIG. 6 shows a mold making process of a masking jig, where (a) shows a second routing, (b) shows a third routing, and (c) shows a fourth routing. FIG. 6 shows a mask making jig mold making process, in which FIG. 5A shows a fifth routing, FIG. 6B shows a sixth routing, and FIG. 5C shows a seventh routing. FIG. 4 shows a mask making jig mold making process, where FIG. 8A shows an eighth routing, FIG. 9B shows a ninth routing, and FIG. 10C shows a resin filling step showing a tenth routing. A workpiece | work (resin molded product) is shown, (a) is a top view, (b) is CC sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Masking apparatus 2 Plate 3 Opening 10 Masking jig 16 Parting edge 17 Mask surface 18 Guide surface 20 Work holding member 24 Retaining metal 30 Workpiece (resin molding product)
31 1st inclination part 32 2nd inclination part 33 Crossing concave corner part 54 Molding space D5 5th type | mold member D6 6th type | mold member D7 7th type | mold member Ma plating part Mb Non-plating part

Claims (5)

A masking jig that covers the resin molded product so that the metal film or paint is attached to only a part of the resin molded product,
A masking jig comprising a resin as a raw material and molded by a resin jig mold that is manufactured in the shape of the resin molded product. A first frame portion that covers the resin molded product and is molded into a frame shape, and a second frame portion that is wider than the first frame portion,
The part from the first frame portion to the second frame portion is a guide surface that is inclined to guide the resin molded product so that the resin molded product is covered by the first frame portion. The masking jig according to claim 1, wherein:   The masking jig according to claim 1, wherein the resin as the material is a urethane resin. A plate, a plurality of openings formed in the plate, and a masking jig according to any one of claims 1, 2 or 3 detachably fixed to the front side of each opening of the plate,
A masking apparatus, wherein the resin molded product partially covered by the masking jig is attached to the masking jig through the opening from the back side of the plate. A method for manufacturing a masking jig according to claim 1, 2 or 3,
A mold creation process for creating a resin jig mold in the shape of a resin molded product in which a metal film or paint is partially attached,
A resin filling step of filling the resin into the resin jig forming die created by this mold creation step;
And a demolding step of demolding from the resin jig mold after the resin filled in the resin filling step is cured.