JP2006231534A - Pressure bonding method of decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mass-produce a decorative sheet using a pressure bonding mold by smoothly subjecting the decorative sheet to woodgraining treatment in a product form wherein a woodgraining line is set on the design surface of a product in a pressure bonding method for bonding the decorative sheet such as cloth or the like to the surface of a resin core material under pressure. <P>SOLUTION: The pressure bonding mold 40 is constituted of a pressure bonding upper mold 50 to which the resin core material 20 is set and a pressure bonding lower mold 60 to which the decorative sheet 30 is set. The pressure bonding lower mold 60 is equipped with a core 61 corresponding to the surface of the product and a woodgraining bar 70 for performing woodgraining treatment prior to pressure bonding treatment and the decorative sheet 30 is subjected to woodgraining treatment in advance by the woodgraining bar 70 within a woodgraining groove 21 before the pressure bonding processing of the decorative sheet 30 is performed by the up and down driving of the core 61. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for crimping a decorative sheet in which a decorative sheet is crimped onto the surface of a resin core material, and in particular, a decoration in which the decorative sheeting of the decorative sheet into the grained groove set in the crimping surface is performed in a good manner. The present invention relates to a sheet pressing method.

  Normally, as shown in FIG. 13, a door trim 1 as an interior part mounted on an interior surface of a side wall panel of a vehicle is decorated on the surface of a resin core material 2 made of a synthetic resin injection molded body or a mold press molded body. The sheet 3 is formed by pressing and integrating, and in order to treat the peripheral terminal 3a of the decorative sheet 3 with good appearance, the resin core material 2 is provided with a grain groove 2a, and a decoration is provided in the grain groove 2a. The peripheral edge terminal 3a of the sheet 3 is press-fitted. For example, the case where the decorative sheet 3 is pressure-integrated and integrated with a predetermined portion of the surface of the resin core material 2 using the pressure-bonding die 4 shown in FIG. 14 will be described. Here, the pressure-bonding die 4 is composed of a pressure-bonding upper mold 5 and a pressure-bonding lower mold 6, and the resin core material 2 is temporarily set to the pressure-bonding upper mold 5, and a decorative sheet such as a cloth is attached to the pressure-bonding lower mold 6. 3 is set. Then, the crimping upper and lower molds 5 and 6 are clamped, and the decorative sheet 3 is crimped to a predetermined portion of the surface of the resin core material 2, and then the wood bar 7 provided on the outer periphery of the crimping lower mold 6 is raised for decoration. Actually, the peripheral edge terminal 3a of the sheet 3 is press-fitted into the wood groove 2a. Note that the top surface of the decorative sheet 3 is coated with an adhesive or an adhesive in advance. A conventional example of the press-fitting method for the decorative sheet 3 is shown in Patent Document 1.

Japanese Utility Model Publication No. 5-16279

  As described above, in the conventional method for crimping the decorative sheet 3, the preceding crimping is basic, and after the decorative sheet 3 is integrated with the surface of the resin core 2, the decorative sheet is subjected to the graining process of the peripheral portion. For example, when a textured structure is adopted for the design surface, other than the structure in which the peripheral edge terminal 3a of 3 is textured, it cannot be handled by the conventional construction method, but can only be dealt with manually, and is troublesome. There was a problem.

  This invention was made in view of such circumstances, and when a decorative sheet such as a cloth is crimped to the surface of a resin core material, even if a grained structure is adopted on the design surface, a crimping die is used. It is an object of the present invention to provide a method for crimping a decorative sheet that can be mass-produced and can be finished in good appearance.

  In order to solve the above-mentioned problem, the present invention provides a decorative sheet pressure bonding method in which a decorative sheet is depressed so that the decorative sheet follows in a grained groove set on the surface of a resin core, and the decorative sheet is pressure bonded. After setting the decorative sheet on one side of the wood with the set pins set at both ends of the wood grain bar provided on the mold, place the wood grain bar in the wood grain groove of the resin core material. By pre-pressing, the decoration sheet is processed into the grain, and then the core of one mold is abutted against the mold surface of the mold on the other side, and the decoration sheet is integrated with the crimping surface of the resin core. It is characterized by performing a crimping process.

  Here, as the resin core material, a synthetic resin obtained by injection molding or mold press molding a general-purpose synthetic resin such as polyethylene resin, polypropylene resin, acrylonitrile / butadiene / styrene (ABS) resin into a required shape. While using resin molded products, the decorative sheet can be a cloth such as jersey, velvet, or moquette, a synthetic resin sheet such as a thermoplastic olefin (hereinafter referred to as TPO) or a thermoplastic plastic urethane (hereinafter referred to as TPU), or a cloth or synthetic resin sheet. It is possible to use a laminated sheet material with a cushion layer lined on the back surface thereof.

  Further, as a crimping die used in the method of the present invention, a crimping upper and lower die is representative, but not limited thereto. For example, when using a crimping upper and lower mold, it is composed of a crimping upper mold for setting the resin core material with its crimping surface facing downward, and a crimping lower mold for setting the crimping surface of the decorative sheet facing upward, Corresponding to the grained grooves formed in the resin core material, the lower end of the graining bar is arranged in a state where the tip of the grained bar protrudes upward from the die surface of the crimped lower mold.

  Therefore, according to the method of the present invention, in order to allow the decorative sheet to follow the grained groove of the resin core material, set pins are set at both ends of the grained bar, and the decorative sheet is pulled by the set pin and the decorative sheet is placed on the grained bar. Since the graining process is performed prior to crimping, the graining process can be performed smoothly and the development of the decorative sheet can be eased.

  Next, in a preferred embodiment of the present invention, after the graining process by the graining bar, a sufficient crimping force is secured by pumping the core of the mold on one side up and down a plurality of times. And And according to this embodiment, after performing the graining process in advance, by pumping the core of the mold on one side with respect to the mold on the other side, the resin core material of the decorative sheet A sufficient pressure-bonding force to the surface can be secured.

  Next, in a further preferred embodiment of the present invention, the mold on one side adopts a divided mold structure that is divided into a plurality of cores by a plurality of graining bars, and alternately performs the graining process and the crimping process. The decorative sheet is integrated with the pressure-bonding surface of the resin core material. And according to this embodiment, the decorative sheet is placed in the grained groove for the graining process of the decorative sheet into the grained groove of the resin core and the pressure-bonding process of crimping the decorative sheet to the pressure-bonding surface of the resin core. After performing the graining process for graining, by alternately performing the crimping process on the outer side, it is possible to perform the certain graining process even in products that employ a graining structure on the design surface.

  As described above, according to the method for crimping a decorative sheet according to the present invention, setting pins are set at both ends of the graining bar, and the graining process is performed before the crimping process smoothly and the development of the decoration sheet is eased. Therefore, even in a product form that adopts a grained structure on the product design surface, there is an effect that it can be mass-produced with good appearance using a crimping die.

  Further, if the crimping die is pumped or a split core is used and the graining process and the crimping process are alternately performed continuously, the appearance is good and reliable graining crimping process can be performed. Has an effect.

  Hereinafter, a preferred embodiment of a method for crimping a decorative sheet according to the present invention will be described in detail with reference to the accompanying drawings by exemplifying an intermediate member to be mounted on a door trim for an automobile.

  FIG. 1 to FIG. 7 show a first embodiment of the present invention, which is an embodiment applied to a decorative sheet pressure-bonding method when producing an inscribed member to be mounted on an automobile door trim. 1 and 2 are a front view and a cross-sectional view showing a configuration of a centering member to be attached to a door trim, and FIG. 3 shows a configuration of a crimping die used for crimping a resin core material and a decorative sheet in the centering member. FIG. 4 is an overall view, FIG. 4 is a plan view of a pressure-bonding lower mold in the pressure-bonding mold, and FIGS.

  In FIG. 1 and FIG. 2, in the intermediate member 10, a decorative sheet 30 made of a cloth is pressure-bonded and integrated on the surface of a resin core material 20 made of a synthetic resin injection molded body or a mold press molded body. More specifically, in the present embodiment, the resin core material 20 is formed by molding press molding a material in which an appropriate amount of talc is mixed with polypropylene resin. Examples of the material include polyethylene resin, polyacetal resin, acrylonitrile / butadiene / A general-purpose thermoplastic resin material such as styrene (ABS) resin can be used, and the resin core material 20 can be molded by an injection molding method in addition to a mold press molded body.

  Further, as the decorative sheet 30, a cloth such as a jersey, velvet, or moquette is used. However, a thermoplastic resin sheet such as TPO or TPU, or a polypropylene foam, a polyethylene foam, or a polyurethane on the back surface of the cloth or the thermoplastic resin sheet. It is also possible to use a decorative sheet 30 having a soft feeling that is backed by a cushion layer such as foam.

  In particular, in the inscribed member 10, as can be seen from the front view of FIG. 1, a plurality of graining lines 11 that are parallel to the product surface (design surface) are set. About this graining line 11, a graining groove 21 is recessed in the resin core material 20, and the graining process is performed so that the press-fit portion 31 of the decorative sheet 30 follows along the inner surface of the graining groove 21. In appearance, it is formed as a grained line 11 having a three-dimensional effect.

  By the way, the method of the present invention is characterized in that, even in a product in which the graining line 11 is set on the design surface as described above, the graining process can be performed in a good manner and can be mass-produced. Therefore, in the first embodiment, mass production is attempted by using the crimping die 40 shown in FIGS. As shown in FIG. 3, the crimping die 40 is generally composed of a crimping upper die 50 and a crimping lower die 60. The crimping upper die 50 is provided with holding means such as a support pin and a suction cup (not shown) for holding the resin core material 20. On the other hand, the press-fit lower mold 60 has a core 61 supported by a cylinder 62 so as to be movable up and down, and a plurality of grain patterns are embedded in the core 61 along a pattern corresponding to the grain grooves 21 of the resin core 20. A bar 70 is accommodated, and set pins 71 are erected on both ends of the grained bar 70 (see FIG. 4).

  Next, a processing method for crimping the decorative sheet 30 on the surface of the resin core material 20 using the above-described crimping die 40 will be described. First, as shown in FIG. 5, the resin core material 20 is set on the upper crimping die 50, and the decorative sheet 30 is set on the lower crimping die 60. The upper surface of the decorative sheet 30 (the surface facing the resin core material 20) is pre-coated with an adhesive or an adhesive. In order to perform the graining process prior to the crimping process, the tip 70a of the graining bar 70 is positioned above the upper end surface of the core 61, and the decorative sheet 30 is set on the crimping lower mold 60. For example, the decorative sheet 30 is set in a state where the press-fitting portion 31 to be subjected to the graining process is lifted upward by the graining bar 70. Then, the upper crimping die 50 is lowered by driving the elevating cylinder 51, and as shown in FIG. 6, the press-fit portion of the decorative sheet 30 is inserted into the wood groove 21 of the resin core material 20 set in the upper crimping die 50. 31 is subjected to a graining process by the tip 70 a of the graining bar 70.

  Thereafter, as shown in FIG. 7, in the press-fit lower mold 60, the cylinder 62 extends, the core 61 is lifted upward, and the press-fit upper mold 50 also rises. At this time, since the upper end surface of the core 61 is positioned above the tip 70a of the graining bar 70, the crimping surface of the core 61 is pressed against the mold surface of the crimping upper die 50 and is brought into contact with the crimping surface of the resin core material 20. The decorative sheet 30 is crimped and integrated with a strong crimping force.

  Thus, in the pressure bonding method of the decorative sheet 30 in the first embodiment, the decorative sheet 30 is first subjected to the graining process by the tip 70a of the graining bar 70 in the graining groove 21 of the resin core member 20, and then the crimping upper and lower molds 50, 50, The crimping process is performed by clamping the mold 60, that is, by raising the core 61. Even in a product in which the textured line 11 is formed on the design surface, the appearance is good and the mass production is performed by using the crimping mold 40. can do. Further, in order to increase the pressure-bonding force of the decorative sheet 30, the bonding strength of the decorative sheet 30 may be enhanced by repeatedly performing a so-called pumping process in which the core 61 is moved up and down a plurality of times.

  FIGS. 8 to 12 show a second embodiment of the present invention. FIGS. 8 and 9 are cross-sectional views and plan views showing the configuration of the crimping die, and FIGS. 10 to 12 use the crimping die. It is explanatory drawing which shows the crimping | compression-bonding method of a decoration sheet. Also in the second embodiment, the product form to be applied is the inscribed member 10, and although not shown, the decorative sheet 30 is integrally bonded to the surface of the resin core material 20, and a plurality of design surfaces of the product are provided. A graining line 11 is set, and a fine graining process is performed. The configuration of the crimping die 40A used in the second embodiment will be described with reference to FIGS. The crimping die 40A has the same configuration as that of the first embodiment with respect to the crimping upper die 50. However, with respect to the crimping lower die 60, the core 61 is composed of five wood grain bars 70A to 70E in this second embodiment. Divided into 6 blocks of split cores 61A-61F. The cylinders 72A to 72E are provided corresponding to the five grain-incorporating bars 70A to 70E, and similarly, dedicated cylinders 73A to 73F are also provided for the split cores 61A to 61F.

  Based on FIG. 10 thru | or FIG. 12, the process of crimping and integrating the decoration sheet 30 on the surface of the resin core material 20 using this crimping die 40A will be described. In the second embodiment, the resin core material 20 is set on the upper crimping die 50 and the decorative sheet 30 is set on the lower crimping die 60. Then, as shown in FIG. This portion is subjected to the graining process in advance by the extending operation of the cylinder 72C.

  Next, as shown in FIG. 11, the split cores 61C and 61D on the left and right sides of the center wood grain bar 70C are raised by the extending operation of the corresponding cylinders 73C and 73D, and the both side surfaces subjected to the graining process are being split. A crimping process is performed by the children 61 </ b> C and 61 </ b> D, and the decorative sheet 30 is crimped to the crimping surface of the resin core material 20.

  Thereafter, the graining bars 70B and 70D adjacent to the split cores 61C and 61D are raised by driving the cylinders 72B and 72D, and after performing the graining process, the split cores 61B and 61E are raised by driving the cylinders 73B and 73E. After that, the crimping process is performed, and then the adjacent outermost graining bars 70A and 70E are raised by driving the cylinders 72A and 72E, and the final graining process is performed. Then, the outermost split cores 61A and 61F are raised as shown by arrows in FIG. 12 by driving the cylinders 73A and 73F, so that the final crimping process is performed.

  As described above, according to the second embodiment, after the wood graining bar 70C is preceded by the wood graining process, the adjacent cores are crimped by the split cores 61C and 61D, and the graining process and the crimping process are performed from the center. It is characterized by processing alternately and continuously toward the outside, and when the graining process is performed collectively, the tension applied to the decorative sheet 30 is so great that the graining process cannot be realized. If a simple processing method is adopted, there is no excessive tension applied to the decorative sheet 30, the decorative sheet 30 can be made to follow the surface shape of the resin core member 20, and even if a grained structure is adopted for the design surface, the appearance It is possible to perform a good crimping process.

  In Example 1 and Example 2, the decorative sheet pressing method according to the present invention was applied to the centering member 10 mounted on the center part of the door trim. However, the decorative sheet was pressed on the core surface and the design surface was textured. The present invention can be applied to all forms in which the structure is adopted. Furthermore, in Example 2 which employs the split cores 61A to 61F, a crimping method is employed in which a graining process and a crimping process are alternately performed by providing a time difference from the center toward the outside. The graining process and the crimping process may be performed alternately toward the ends.

It is a front view which shows the contact member for door trims manufactured using the crimping | compression-bonding method of the decoration sheet which concerns on this invention. It is sectional drawing which shows the structure of the inscribed member shown in FIG. It is a general view which shows the 1st Example of the crimping | compression-bonding metal mold | die used for this invention method. FIG. 4 is a plan view of a lower crimping die in the crimping die shown in FIG. 3. It is explanatory drawing which shows the setting process of the resin core material and decoration sheet in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is explanatory drawing which shows the advance graining process in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is explanatory drawing which shows the crimping process process in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is a general view which shows 2nd Example of the crimping die used for the crimping | compression-bonding method of the decoration sheet which concerns on this invention. FIG. 9 is a plan view of a lower crimping die in the crimping die shown in FIG. 8. It is explanatory drawing which shows the setting process of the resin core material and decoration sheet in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is explanatory drawing which shows the crimping | compression-bonding process in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is explanatory drawing which shows the outermost graining process process in the crimping | compression-bonding method of the decoration sheet using the crimping | compression-bonding metal mold | die shown in FIG. It is sectional drawing which shows the structure of the conventional door trim. It is explanatory drawing which shows the outline | summary of the conventional crimping | compression-bonding method of a decoration sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Centering member 11 Graining line 20 Resin core material 21 Graining groove 30 Decorative sheet 31 Press-fit part 40 Crimping die 50 Crimping upper die 51 Lifting cylinder 60 Crimping lower die 61, 61A-61F Core 62 Drive cylinder 70, 70A-70E Wood grain bar 71 Set pin 72A to 72E Drive cylinder 73A to 73F Drive cylinder

Claims (3)

In the pressure-bonding method of the decorative sheet (30), the decorative sheet (30) is depressed so as to follow the decorative sheet (30) in the wood groove (21) set on the surface of the resin core (20).
While setting the decorative sheet (30) to the graining bar (70) with the set pins (71) set at both ends of the graining bar (70) provided on the one side mold (60), the mold on the one side After setting on the mold (60), the wood grain bar (70) is pre-pressed into the wood grain groove (21) of the resin core material (20) to perform the graining process on the decorative sheet (30). The core (61) of the mold (60) on the side is abutted against the mold surface of the mold (50) on the other side, and the decorative sheet (30) is crimped and integrated with the crimping surface of the resin core (20). A method for crimping a decorative sheet, characterized by performing a crimping process.   After the graining process by the graining bar (70), the core (61) of the mold (60) on one side is pumped up and down a plurality of times to ensure a sufficient crimping force. Item 2. A method for crimping a decorative sheet according to Item 1. The mold (60) on the one side adopts a split mold structure that is divided into a plurality of cores (61A to 61F) by a plurality of graining bars (70), and the graining process and the crimping process are alternately continued. The decorative sheet pressing method according to claim 1, wherein the decorative sheet (30) is integrated with the pressing surface of the resin core (20).

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