JP5450032B2 - Skin crimping method and crimping device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin crimping method and a crimping apparatus suitable for manufacturing automobile interior parts composed of a core material and a skin, such as a door trim, a rear side trim, and a luggage side trim. The present invention relates to a skin crimping method and a crimping apparatus that can be expected to have a beautiful appearance without deformation of the pattern or drawing pattern because no wrinkles are generated and no excessive tension is applied to the skin. .

  FIG. 19 shows a structure of a typical door trim 1 of an automobile interior part. The door trim 1 is formed by joining upper and lower divided bodies of a door trim upper 2 and a door trim lower 3 to each other. The door trim upper 2 uses a laminated structure in which a skin 2b excellent in touch and appearance performance is bonded to the surface of a core material 2a molded into a required shape, while the door trim lower 3 is made of synthetic resin. Single resin products such as injection-molded bodies and mold-press molded bodies are used.

  Next, a conventional method and an apparatus for crimping and integrating the skin 2b on the surface of the core material 2a like the door trim upper 2 will be described below. First, as shown in FIG. 20, the crimping device 4 used when crimping the outer skin 2b to the core material 2a in the door trim upper 2 includes an upper crimping mold 5 for setting the core material 2a and a lower crimping mold for setting the skin 2b. 6 and a clamp mechanism 7 that holds a part of the periphery of the skin 2b and applies an appropriate tension to the skin 2b during the crimping process of the skin 2b.

  More specifically, the upper crimping die 5 is supported by an upper mounting plate 5a, and an elevating cylinder 5b is connected to the upper mounting plate 5a. Perform the action. Further, in the crimping lower mold 6, a movable lower mold 6A and a fixed lower mold 6B are supported by a lower mounting plate 6a. The movable lower die 6A is attached to the lower attachment plate 6a via a spring 6b, while the fixed lower die 6B is directly attached to the lower attachment plate 6a.

  The operation of the crimping device 4 will be described briefly. The crimping upper die 5 is joined to the movable lower die 6A of the crimping lower die 6 in a one-step pressing process, for example, crimping at the flat surface portion of the door trim upper 2. Processing is performed. Thereafter, in the two-stage pressing process, the upper crimping die 5 is followed by further lowering, and the movable lower die 6A is lowered while crimping the spring 6b, so that the upper crimping die 5 and the fixed lower die 6B are molded. After being tightened, the crimping process is performed at the waist portion of the door trim upper 2.

  Further, the conventional crimping device 4 is provided with a clamp mechanism 7 that holds the skin 2b on a part of the periphery of the crimping lower die 6 in order to apply an appropriate tension to the skin 2b when the skin 2b is crimped. ing. As shown in FIG. 21, the conventional clamping mechanism 7 is provided with a set pin 7a that is inserted into a set hole 2c at the periphery of the skin 2b and supports the skin 2b, and a slider 7b that supports the set pin 7a is provided. The LM guide 7c is slidably attached, and a spring 7e is provided between the slider 7b and the frame 7d. Accordingly, the set pin 7a is movable in the direction of the arrow along the LM guide 7c according to the tension applied to the skin 2b against the spring pressure of the spring 7e.

  Next, a conventional method for manufacturing the door trim upper 2 using the conventional crimping apparatus 4 described above, that is, a method for crimping the skin 2b on the surface of the core member 2a will be described. First, as shown in FIG. 22, when the crimping upper and lower molds 5 and 6 are in the mold open state, the core material 2a is set on the mold surface of the crimping upper mold 5 and the mold surface of the crimping lower mold 6 is covered with the skin. Set 2b. At this time, the skin 2b inserts the set pin 7a of the clamp mechanism 7 into the set hole 2c opened along the periphery of the skin 2b, and holds the periphery of the skin 2b by the clamp mechanism 7.

  When the setting process of the core material 2a and the skin 2b is completed, as shown in FIG. 23, the crimping upper die 5 is lowered by a predetermined stroke by driving the elevating cylinder 5b. The movable lower mold 6A is clamped, and the skin 2b is crimped and integrated with the surface of the core 2a at the flat surface portion of the door trim upper 2.

  Thereafter, the press-bonding upper die 5 is continuously lowered, and a two-stage pressing process is performed as shown in FIG. That is, as the crimping upper mold 5 is lowered, the movable lower mold 6 </ b> A of the crimping lower mold 6 is lowered while compressing the spring 6 b, and the crimping upper mold 5 and the lower fixed side at the waist portion of the door trim upper 2. The outer skin 2b is crimped between the mold 6B. During this two-stage pressing process, the set pin 7a moves in the direction of the arrow in FIG. 24 along the LM guide 7c against the spring pressure of the spring 7e particularly by the tension applied to the skin 2b. Tension is applied, and crimping of the skin 2b is performed without generating wrinkles. A conventional crimping method and crimping apparatus for the skin 2b to the core material 2a are described in detail in Patent Document 1.

Japanese Patent Laid-Open No. 10-34454

  Thus, conventionally, in order to crimp the outer skin 2b on the surface of the core material 2a, the outer skin 2b is set on the spring-biased set pin 7a. At this time, the upper crimping die 5 is lowered. Accordingly, the skin 2b is drawn to the crimping upper and lower molds 5 and 6 side, but the skin 2b is not wrinkled by applying tension to the skin 2b by the repulsive force of the spring 7e of the clamp mechanism 7. The outer skin 2b was crimped. However, in the conventional method, even when the upper crimping die 5 is lowered, the tension is still applied to the outer skin 2b, so that the pattern or drawing pattern of the outer skin 2b is excessively stretched and the appearance appearance is lowered. Has been pointed out. Similarly, not only the deformation of the appearance pattern but also a problem that a thin wall defect or whitening partially occurs due to excessive application of tension.

  The present invention has been made in view of such circumstances, and relates to a method and apparatus for crimping a skin for crimping a skin on the surface of a core material, using a clamp mechanism having a spring-biased set pin. In the skin crimping method and crimping device for crimping the skin to the core material surface while applying tension to the skin to prevent wrinkles, it is possible to reliably prevent excessive tension from being applied to the skin just before the crimping process is completed. An object of the present invention is to provide an epidermis crimping method and crimping apparatus that eliminates deformation of the pattern and drawing pattern of the epidermis, maintains a good appearance, and also eliminates partial thinness defects and whitening. It is said.

  In order to achieve the above object, the present invention sets the core material on the upper crimping die, sets the skin on the lower crimping die, and is biased by a spring in the clamp mechanism disposed on the outer periphery of the lower crimping die. Insert the set hole provided in the peripheral edge of the skin into the set pin, and when the upper and lower molds are clamped, the set pin moves inward so that an appropriate tension is applied to the skin while the core material is In the skin crimping method for crimping the skin to the surface, when the skin is crimped to the surface of the core material by the clamping operation of the crimping upper and lower molds, the direction in which the set pin approaches the crimped lower mold due to the tension applied to the skin When the set pin reaches a certain point, the set pin automatically disengages from the set hole in the epidermis, and excessive tension is applied to the epidermis just before the end of the crimping process between the core and the epidermis. Characterized in that it has been avoided.

  Here, the application target of the skin pressure bonding method according to the present invention is applicable to all laminated molded articles having a core material and a skin. For example, it is suitable for automotive interior parts such as door trims, rear side trims, and luggage side trims. In addition to the synthetic resin core material, a wood-based core material or the like can be used as the core material. Furthermore, as the skin, a single sheet such as a synthetic resin sheet or cloth, or a laminated sheet material having a cushion layer lined on the back surface of a single sheet such as a synthetic resin sheet or cloth can be used.

  Furthermore, the method of the present invention adds excessive tension to the epidermis just before the end of the crimping process because the set pin comes off the epidermis at a certain point when crimping the epidermis to the core surface while applying tension to the epidermis. It is the feature that it can prevent reliably.

  Here, as a method of automatically detaching the set pin from the skin, for example, a pen cylinder is connected to the set pin, and when the set pin reaches a certain point, the pen cylinder operates to set the set pin. It is preferable to have a configuration in which the is automatically pulled out from the set hole of the epidermis. In this case, as the timing for driving the pen cylinder, a method such as detecting the stroke amount of the crimping upper / lower mold or detecting the moving amount of the set pin can be considered.

  Next, a preferred embodiment of the crimping apparatus used when carrying out the method of the present invention is a crimping apparatus used when crimping the skin on the surface of the core material. A crimping upper mold to be set and a crimping lower mold to set the skin are arranged so that the mold can be clamped and opened, and disposed on at least a part of the outer periphery of the above-mentioned crimping lower mold, holding the periphery of the skin, In the skin crimping device comprising a clamp mechanism that applies an appropriate tension to the clamp mechanism, the clamp pin is spring-biased with a set pin inserted into the set hole of the skin, and when clamping the upper and lower molds When a predetermined tension is applied to the skin, the set pin is pulled toward the crimping lower die by this tension, moves by a predetermined amount, and when it reaches a certain point, the set pin is automatically inserted from the set hole in the skin. Pen cylinder for pulling is characterized in that it is coupled to the set pin.

  In another embodiment, it is also possible to employ a crimping device having a configuration in which the set pin is automatically removed from the set hole of the skin without using a pen cylinder or its switch mechanism. In a preferred embodiment, a crimping device used when crimping a skin onto the surface of a core material, the crimping device includes a crimping upper die for setting a core material, and a crimping lower die for setting a skin Is arranged so as to be clamped and mold-openable, and is disposed on at least a part of the outer periphery of the pressure-bonding lower mold, and holds a peripheral edge of the epidermis and a clamp mechanism that applies an appropriate tension to the epidermis. In the crimping apparatus, the clamp mechanism is inserted into a set hole of the skin, and a set pin that holds the skin is provided in a spring-biased state, and the set pin is inclined downward toward the crimping lower mold side. It is supported so as to be slidable along the LM guide provided through the inclined block. When the crimping upper and lower molds are clamped, a predetermined tension is applied to the skin, and the set pin is attached to the lower mold side by this tension. Attracted, to move a predetermined amount, when it has reached a certain point, characterized in that the set pin from the set hole of the epidermis is to automatically disengage.

  As described above, according to the method and apparatus for crimping the skin according to the present invention, when the skin is crimped to the surface of the core material by clamping the upper and lower molds, the peripheral edge of the skin is set by the spring-biased set pin in the clamp mechanism. Since the crimping process is performed while holding the portion, the skin is not wrinkled, and the skin can be crimped to the surface of the core material while applying an appropriate tension to the skin. In addition, due to the tension applied to the skin during the crimping process of the skin, the end portion of the skin is drawn toward the crimped lower mold, but the set pin that holds the skin end is also pulled in the direction close to the crimped lower mold. And when the amount of movement that the set pin moves reaches a predetermined amount, and the set pin reaches a predetermined point, the set pin is automatically removed from the set hole of the epidermis. Thus, excessive tension is not applied to the epidermis.

  As described above, according to the skin pressure bonding method and the pressure bonding apparatus according to the present invention, when the skin is crimped to the surface of the core material by clamping the crimping upper and lower molds, the clamping mechanism provided on the outer periphery of the crimping lower mold The outer peripheral edge of the epidermis is held with a spring-biased set pin, and the epidermis is crimped to the core material surface while applying appropriate tension to the epidermis. Therefore, excessive tension is not applied to the epidermis immediately before finishing the crimping of the epidermis. Therefore, it is possible to effectively solve the deformation defect of the pattern and squeezing pattern, which has been a problem in the past, and to improve the appearance performance, as well as to solve the thin wall defect and whitening, as well as the prevention of wrinkles, and the appearance performance. It has the effect that it can maintain favorably.

It is a front view which shows the door trim manufactured by applying the skin pressure bonding method according to the present invention. It is the II-II sectional view taken on the line in FIG. 1 is a schematic diagram showing a configuration of a first embodiment of a skin pressure bonding device according to the present invention. It is explanatory drawing which shows the structure of the clamp mechanism in the crimping | compression-bonding apparatus shown in FIG. It is a top view which shows the structure of the clamp mechanism in the crimping | compression-bonding apparatus shown in FIG. The 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention is shown, and it is explanatory drawing which shows the setting process of a core material and a skin. It is explanatory drawing which shows the one step press process in 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention. In 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention, it is explanatory drawing which shows the state before a set pin remove | deviates from a skin. It is explanatory drawing which shows the structure of the switch mechanism of a pen cylinder in 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention. In 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention, it is explanatory drawing which shows the free state of the skin after a set pin remove | deviates. It is explanatory drawing which shows the two-stage press process in 1st Example of the crimping | compression-bonding method of the skin which concerns on this invention. It is a schematic diagram which shows the structure of 2nd Example of the crimping | compression-bonding apparatus of the skin which concerns on this invention. It is explanatory drawing which shows the structure of the clamp mechanism in the crimping | compression-bonding apparatus shown in FIG. It is a top view which shows the structure of the clamp mechanism in the crimping | compression-bonding apparatus shown in FIG. It is a side view which shows operation | movement of the clamp mechanism in 2nd Example of the crimping | compression-bonding method of the skin which concerns on this invention. It is a top view which shows operation | movement of the clamp mechanism in 2nd Example of the crimping | compression-bonding method of the skin which concerns on this invention. It is a side view which shows another embodiment in 2nd Example of the crimping | compression-bonding apparatus of the skin which concerns on this invention. In the embodiment shown in FIG. 17, it is explanatory drawing which shows the state which a set pin removes. It is sectional drawing which shows the conventional door trim. It is explanatory drawing which shows the structure of the conventional skin crimping | compression-bonding apparatus. It is explanatory drawing which shows the structure of the clamp mechanism in the conventional skin crimping | compression-bonding apparatus. It is explanatory drawing which shows the setting process of the core material and skin in the conventional crimping | compression-bonding method of a skin. It is explanatory drawing which shows the one step press process in the conventional crimping | compression-bonding method of a skin. It is explanatory drawing which shows the two-stage press process in the conventional crimping | compression-bonding method of a skin.

  Hereinafter, specific examples of the method for crimping the skin and the crimping apparatus according to the present invention will be described in detail with reference to the accompanying drawings. Note that the gist of the present invention is as described in the scope of claims, and the contents of the embodiments described below are merely examples of the present invention.

  1 to 11 show a first embodiment of the present invention. FIG. 1 is a front view showing a door trim manufactured by applying the method of the present invention. FIG. 2 is a sectional view showing the structure of the door trim. FIG. 4 and FIG. 5 are side views and plan views showing the configuration of the clamp mechanism in the crimping apparatus, and FIGS. 6 to 11 are diagrams showing each of the methods of the present invention. FIG. 6 shows a material setting process, FIG. 7 is an explanatory diagram showing a one-step pressing process, and FIGS. 8 to 10 show a skin tension application state, a switch operation state, and a skin free state in the method of the present invention. FIG. 11 is an explanatory view showing a two-stage pressing process.

  1 and 2, the configuration of an automotive door trim 10 manufactured by applying the method of the present invention will be briefly described. The door trim 10 is attached to the indoor surface side of a door panel (not shown) via a fixing means such as a clip (not shown). The door trim 10 is composed of an upper and lower divided body of a door trim upper 20 and a door trim lower 30. Has been. Here, the door trim upper 20 is composed of a laminated structure in which a skin 22 is bonded and integrated on the surface of the core material 21, and the door trim lower 30 is a resin such as a synthetic resin injection molded body or a mold press molded body. It consists of a single item. In addition, since it is not the principal part of this invention, about the joining structure of the door trim upper 20 and the door trim lower 30 is abbreviate | omitted here.

  Next, in the door trim upper 20 of the door trim 10, the core material 21 and the skin 22 constituting the door trim upper 20 are made of a synthetic resin injection-molded body or a mold press-molded body. Synthetic resin materials include polyethylene resins, polypropylene resins, polystyrene resins, polyethylene terephthalate resins, polyvinyl alcohol resins, vinyl chloride resins, polyamide resins, polyacetal resins, polycarbonate resins, ionomer resins, acrylonitrile. / Butadiene / styrene (ABS) resin or the like can be used. Further, as the skin 22, a synthetic resin sheet such as a TPO (thermoplastic olefin) sheet or a vinyl chloride sheet, a single sheet material such as a woven fabric sheet, or a polyurethane foam, polypropylene foam, A laminated sheet material lined with a cushion layer such as polyethylene foam can be used.

  By the way, the method of the present invention and the device of the present invention are characterized in that in the laminated molded product represented by the door trim upper 20 in the door trim 10, the outer skin 22 is smoothly crimped on the surface of the core material 21 without generating wrinkles. In particular, it is characterized in that the appearance appearance is favorably maintained without extending the pattern, the drawn pattern, or the like. Therefore, the following configuration is adopted as an apparatus used in the method of the present invention. That is, as shown in FIG. 3, when the crimping apparatus 40 crimps the skin 22 onto the core 21, the crimping upper mold 50 for setting the core 21, the crimping lower mold 60 for setting the skin 22, and the skin 22 And a clamp mechanism 70 for applying tension to 22.

  More specifically, the upper crimping die 50 is supported by the upper mounting plate 51, and the lifting cylinder 52 is connected to the upper mounting plate 51. On the other hand, the pressure-bonding lower mold 60 that is clamped and opened with respect to the pressure-bonding upper mold 50 employs a divided structure of the movable-side lower mold 60A and the fixed-side lower mold 60B, and is fixed to the movable-side lower mold 60A. The side lower mold 60B is divided to form the flat surface portion and the waist portion of the door trim upper 20 in a favorable manner. The movable lower mold 60A is supported so as to be movable up and down with respect to the lower mounting plate 61 via a spring 62, and the fixed lower mold 60B is directly fixed to the lower mounting plate 61. .

  Next, as shown in FIGS. 3 to 5, the clamp mechanism 70 provided for applying tension to the skin 22 is inserted into the set holes 23 provided at a predetermined pitch interval on the periphery of the skin 22, and the skin 22 Is provided, and a slider 71b is attached to a support 71a that supports the set pin 71. Further, the slider 71 b slides along the LM guide 72 toward and away from the crimping lower mold 60, and the set pin 71 is spring-biased by a spring 73. That is, the spring 73 is inserted between the frame 74 and the support 71 a of the set pin 71, and the set pin 71 is always biased in a direction away from the crimping lower die 60. In order to adjust the spring pressure of the spring 73, an adjuster 73a is provided.

  Further, in the present invention, the pen cylinder 75 is connected to the lower end of the set pin 71 so that the set pin 71 can be moved up and down. When the pen cylinder 75 is operated, the tip portion of the set pin 71 is supported by the support body. It will be pulled in so that it may be located below the upper surface of 71a, and set pin 71 will automatically remove from set hole 23 of skin 22. As a switch mechanism for controlling the operation timing of the pen cylinder 75, in this first embodiment, as shown in FIG. 3, a post 80 is erected on the lower mounting plate 61 of the crimping lower mold 60. A limit switch 81 is attached. An operation piece 63 is provided on the movable lower mold 60A of the crimping lower mold 60, and the operation piece 63 is configured to turn on the limit switch 81 according to a predetermined downward stroke amount of the movable lower mold 60A. ing. The operation piece 63 for turning the limit switch 81 on and off may be provided on the upper crimping die 50 in addition to the movable lower die 60A.

  Accordingly, when the upper skin 50 is lowered and the outer skin 22 is crimped to the surface of the core material 21 while applying tension to the outer skin 22, particularly in the two-stage press process, the upper crimping die 50 and the movable lower die. When 60A is lowered integrally, the limit switch 81 is turned ON by the operation piece 63 and the set pin 71 is pulled downward by the pen cylinder 75, so that the set pin 71 is automatically inserted from the set hole 23 of the skin 22. By detaching, excessive tension is not applied to the skin 22. As described above, as a method of controlling the operation timing of the pen cylinder 75, the method of detecting the lowering stroke amount of the crimping upper and lower molds 50, 60 with the limit switch 81 is adopted, but the slider 71b sliding the LM guide 72 is used. The pen cylinder 75 may be controlled based on the slide stroke amount.

  Next, the method of the present invention will be described over time with reference to FIGS. First, as shown in FIG. 6, when the crimping upper and lower molds 50, 60 are in the mold open state, the core material 21 is set on the crimping upper mold 50 and the skin 22 is set on the crimping lower mold 60. At this time, the adhesive a is applied in advance to the skin facing surface of the core material 21 set in the upper crimping die 50. Further, with respect to the skin 22 set on the lower crimping die 60, the set hole 23 of the skin 22 is inserted into the set pin 71 of the clamp mechanism 70.

  In this way, when the setting work of the core material 21 and the skin 22 is completed with respect to the crimping upper and lower molds 50 and 60, as shown in FIG. 7, the elevating cylinder 52 is driven and the crimping upper mold 50 is lowered by a predetermined stroke. Thus, a one-stage pressing process is performed. That is, by pressing the upper crimping die 50 and the movable lower die 60A in the lower crimping die 60, the crimping process of the skin 22 to the core material 21 between the upper crimping die 50 and the movable lower die 60A. The door trim upper 20 is molded at the flat surface portion. At this time, as shown in FIG. 8, the skin 22 is drawn toward the crimping upper and lower molds 50 and 60, but an appropriate tension is applied to the skin 22 by the spring pressure of the spring 73 applied to the set pin 71. Therefore, wrinkles are not generated on the skin 22 during the crimping process between the crimping upper mold 50 and the movable lower mold 60A.

  As described above, the crimping process of the outer skin 22 to the core material 21 is performed between the crimping upper mold 50 and the movable lower mold 60 </ b> A, and the crimping lower mold 60 is further lowered by driving the elevating cylinder 52. Continue. At this time, the set pin 71 is quite close to the crimping upper and lower molds 50 and 60 due to the tension applied to the skin 22, but when the set pin 71 moves a predetermined amount with respect to the spring pressure of the spring 73, the skin 22 The amount of movement of the set pin 71, which is closely related to the tension applied to the wire, and the stroke amount of the upper crimping die 50 or the movable lower die 60A are in a correlation, so that as shown in FIG. 9, the movable lower die 60A 10, the pen cylinder 75 of the clamp mechanism 70 is driven to pull the set pin 71 downward, and the peripheral portion of the skin 22 is set to the set position as shown in FIG. Since the pin 71 is automatically removed, the skin 22 is in a free state and no tension is applied.

  Therefore, in the two-stage pressing process, as the upper crimping die 50 is lowered, the movable lower die 60A is also lowered by a predetermined stroke while compressing the spring 62 integrally with the upper crimping die 50, and the upper crimping die 50 is compressed. The lowering operation of the upper crimping die 50 is stopped in a state where the stationary lower die 60B is clamped. During the two-stage pressing process, the core material 21 and the skin 22 are crimped at the waist portion of the door trim upper 20. Then, as shown in FIG. 11, since the tension is not applied to the peripheral portion of the skin 22, as shown in FIG. 11, the pattern pattern, the drawn pattern, etc. are not excessively stretched, and there is no possibility of deteriorating the appearance appearance. Therefore, the appearance performance can be maintained satisfactorily.

  As described above, according to the first embodiment of the present invention, the skin 22 is attached to the core material 21 while applying an appropriate tension to the skin 22 in the one-step pressing process and the two-stage pressing process of the crimping upper and lower molds 50 and 60. Since the surface can be crimped, wrinkles do not occur on the product surface. Furthermore, the skin 22 is held by the limit switch 81 being turned on by a predetermined stroke amount of the crimping upper and lower molds 50, 60 so that excessive tension is not applied to the skin 22 just before the end of the crimping process. Since the set pin 71 is automatically removed and the outer skin 22 is in a free state just before the end of the crimping process, there is no fear that the pattern pattern and the drawn pattern will be extended, and the effect of maintaining a good appearance can be expected.

  FIGS. 12 to 18 show a second embodiment of the present invention. FIG. 12 is a schematic diagram showing the configuration of the second embodiment of the crimping apparatus according to the present invention. FIGS. FIG. 17 and FIG. 18 are explanatory views showing another embodiment of the clamp mechanism in the second embodiment.

  In FIG. 12, the structure of the clamp mechanism 70 is changed with respect to the crimping | compression-bonding apparatus 40 of 2nd Example with respect to 1st Example. Therefore, since the structures of the crimping upper and lower molds 50 and 60 are the same as those in the first embodiment, the description thereof is omitted here. That is, as shown in FIGS. 13 and 14, the clamp mechanism 70 in the second embodiment is inserted into the set hole 23 of the skin 22 and the support body 71a that supports the set pin 71 that holds the skin 22 is a slider 71b. The slider 71b is supported so as to be slidable in the direction of the arrow along the LM guide 72 mounted on the horizontal plate portion 74a of the frame 74 via the inclined block 76. Further, a spring 73 is inserted between the support 71a of the set pin 71 and the frame 74, and the attachment position of the bracket 77 for adjusting the skin removal timing with respect to the flange 74b of the horizontal plate portion 74a is in the vertical direction. Can be adjusted. In the above-mentioned bracket 77 for adjusting the skin removal timing, a vertical wall-shaped attachment piece 77a is attached to the flange 74b of the frame 74, and the attachment position is moved up and down by sliding the screw 77c in the adjustment elongated hole 77b extending vertically. Any direction can be set. In addition, a concave groove 77 d that allows the set pin 71 to move is provided on the set surface of the skin 22 in the skin removal timing adjustment bracket 77.

  Therefore, also in the second embodiment, the core material 21 is set on the upper crimping die 50, the outer skin 22 is set on the lower crimping die 60, and the set hole 23 of the outer skin 22 is provided on the set pin 71 of the clamp mechanism 70. Set (see FIGS. 13 and 14). Thereafter, the upper and lower crimping molds 50 and 60 are clamped. In particular, in the two-stage pressing process, as shown in FIGS. 15 and 16, the set pin 71 is crimped by the tension from the skin 22 applied during the crimping process. In this second embodiment, the LM guide 72 is inclined downward by a predetermined angle when the LM guide 72 is brought close to the crimping upper and lower molds 50, 60 by the inclined block 76. Is pulled toward the crimping upper and lower molds 50 and 60 side, the set pin 71 gradually descends by a predetermined dimension in proportion to the slide stroke amount, and finally the set pin 71 is automatically removed from the set hole 23 of the skin 22. become. Accordingly, as in the first embodiment, in the second embodiment, too much tension is not applied to the outer skin 22 just before the crimping process is finished, and the outer skin 22 is in a free state, so that the pattern or drawing pattern is not deformed. The effect that it can prevent is expected.

  Next, FIGS. 17 and 18 show another embodiment of the second embodiment. By adjusting the height position of the skin removal timing adjustment bracket 77 with respect to the flange 74b of the frame 74, FIG. The projecting dimension of the pin 71 (indicated by d in FIG. 17) can be adjusted, and the timing at which the set pin 71 is automatically removed from the set hole 23 of the skin 22 can be changed.

  Also in the second embodiment, as in the first embodiment, the amount of movement of the set pin 71 reaches a predetermined amount due to the tension applied to the skin 22 at the end of the crimping process of the skin 22 to the core material 21 and is constant. When the set pin 71 slides along the LM guide 72 set to be inclined, the set pin 71 is automatically removed from the set hole 23 of the skin 22, The outer skin 22 is in a free state, and the pattern performance, the drawn pattern, etc. are not deformed, and the appearance performance can be maintained satisfactorily. In the second embodiment, it is possible to cope with the simple structure of attaching to the LM guide 72 via the inclined block 76, and the mechanism such as the limit switch 81 and the pen cylinder 75 as in the first embodiment is not required. It can correspond to.

  Both the first embodiment and the second embodiment described above are applied to the crimping process of the core material 21 and the skin 22 in the door trim upper 20. However, the first embodiment and the second embodiment are laminated molded products obtained by crimping the skin 22 on the surface of the core material 21. If it exists, the use is not ask | required. Further, in this embodiment, the limit switch 81 for operating the pen cylinder 75 for driving the set pin 71 is turned on by the operation piece 63 provided on the movable lower mold 60A. It is also possible to employ a switch mechanism in which the limit switch 81 is turned on by the amount or the amount of movement of the set pin 71.

DESCRIPTION OF SYMBOLS 10 Automotive door trim 20 Door trim upper 21 Core material 22 Skin 23 Set hole 30 Door trim lower 40 Crimping device 50 Crimping upper die 51 Upper mounting plate 52 Lifting cylinder 60 Crimping lower die 60A Movable lower die 60B Fixed lower die 61 Lower attachment Plate 62 Spring 63 Operation piece 70 Clamp mechanism 71 Set pin 71a Support body 71b Slider 72 LM guide 73 Spring 73a Adjuster 74 Frame 75 Pen cylinder 76 Inclined block 77 Skin removal timing adjustment bracket 80 Post 81 Limit switch

Claims (3)

The core member (21) is set on the upper crimping die (50), the skin (22) is set on the lower crimping die (60), and the clamp mechanism (70) disposed on the outer periphery of the lower crimping die (60). ) In the spring-biased set pin (71), the set hole (23) provided in the periphery of the skin (22) is inserted, and when the crimping upper and lower molds (50, 60) are clamped, the set pin ( In the pressure bonding method of the skin (22) in which the skin (22) is pressure-bonded to the surface of the core material (21) while applying an appropriate tension to the skin (22) by moving 71) inward.
When the outer skin (22) is crimped to the surface of the core material (21) by the clamping operation of the upper and lower crimping molds (50, 60), the set pin (71) is pressed by the tension applied to the outer skin (22). When the set pin (71) reaches a certain point when it is drawn close to the mold (60), the set pin (71) is automatically removed from the set hole (23) of the skin (22), and the core material A method for crimping a skin, characterized in that excessive tension is not applied to the skin (22) just before the crimping process of (21) and the skin (22) is completed. A crimping device (40) used when crimping the outer skin (22) onto the surface of the core material (21). The crimping device (40) is a crimp upper die (50) for setting the core material (21). ) And a crimping lower mold (60) for setting the outer skin (22) are arranged so that the mold can be clamped and opened, and disposed on at least a part of the outer periphery of the lower crimping mold (60). In the crimping device (40) of the skin (22) composed of a clamp mechanism (70) that holds the periphery of the skin and applies an appropriate tension to the skin (22),
In the clamping mechanism (70), the set pin (71) inserted into the set hole (23) of the skin (22) is spring-biased, and when the crimping upper and lower molds (50, 60) are clamped, the skin When a predetermined tension is applied to (22), the set pin (71) is pulled toward the crimping lower mold (60) side by this tension, moves a predetermined amount, and reaches a certain point, the set hole of the skin (22) A skin crimping device, wherein a pen cylinder (75) for automatically pulling out the set pin (71) from (23) is connected to the set pin (71). A crimping device (40) used when crimping the outer skin (22) onto the surface of the core material (21). The crimping device (40) is a crimp upper die (50) for setting the core material (21). ) And a crimping lower mold (60) for setting the outer skin (22) are arranged so that the mold can be clamped and opened, and disposed on at least a part of the outer periphery of the lower crimping mold (60). In the crimping device (40) of the skin (22) composed of a clamp mechanism (70) that holds the periphery of the skin and applies an appropriate tension to the skin (22),
The clamp mechanism (70) is inserted into the set hole (23) of the skin (22), and a set pin (71) for holding the skin (22) is provided in a spring-biased state. (71) is slidably supported along an LM guide (72) provided via an inclined block (76) that is inclined downward toward the crimping lower mold (60) side. , 60), a predetermined tension is applied to the outer skin (22), and the set pin (71) is pulled toward the crimping lower mold (60) by this tension, moves by a predetermined amount, and reaches a certain point. The epidermis crimping device, wherein the set pin (71) is automatically removed from the set hole (23) of the epidermis (22).

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