JP5683435B2 - Method for manufacturing vehicular molding material and bending jig for vehicular molding material - Google Patents

Description

  The present invention relates to a method for manufacturing a vehicular molding material and a bending jig for the vehicular molding material.

  Various long resin molding materials are attached to automobiles. For example, the following patent document discloses a vehicle molding material with a door glass weatherstrip. The vehicle molding material has a design surface for decoration purposes, and is attached along the concave curved portion of the door panel so that the design surface is exposed to the outside. That is, the vehicle molding material is bent so that the design surface is inward.

  In general, the molding material is manufactured by cutting a resin molding material continuously extruded from an extruder at predetermined lengths. Further, when the part to which the molding material is attached is curved in the concave shape, the molding material is bent along the curved portion in post-processing. Conventionally, as this bending processing means, press bending processing means or bender bending processing means has been used.

Japanese Utility Model Publication No. 62-189957 Japanese Utility Model Publication No.59-126720

  However, in any of the above bending means, since the molding material is bent while being pressed against a mold having a predetermined shape, there is a possibility that traces (pressurized marks) may remain. Further, depending on the bending direction and the bending angle, it may be necessary to press and curve in a concave shape from the design surface side of the molding material. In such a case, the design surface (appearance) may be deteriorated.

  The present invention has been made in view of the above problems, and provides a method for manufacturing a vehicular molding material and a vehicular molding material curving jig that can be curved into a concave shape without leaving traces on the design surface. With the goal.

  In order to solve the above-described problems, the present invention provides a method for manufacturing a molding material for a vehicle that is mounted so that a design surface is exposed along a concave curved portion of the vehicle. On the other hand, a technique is adopted in which a load processing is applied and a bending process step of bending the design surface into a concave shape so as to correspond to the bending portion is employed.

  In the present invention, the bending step includes an installation step of setting the vehicle molding material on a bending jig, and the bending jig has a concave curved shape corresponding to the bending portion. A movable portion that has a linear shape and is movable between a first position that follows the fixed curved portion and a second position that is spaced apart from the fixed curved portion and is discontinuous with the fixed curved portion. A linear portion; an urging portion that urges the movable linear portion from the second position toward the first position; and a clamp portion that is provided on the movable linear portion and clamps the vehicle molding material. The method of comprising is adopted.

  Further, in the present invention, the bending step includes a notch step of forming a portion to be clamped by the clamp portion by notching a part of the vehicle molding material on the non-exposed surface side prior to the installation step. The method of including is adopted.

  In the present invention, a technique is adopted in which the vehicle molding material has thermoplasticity, and the bending step includes a heating step of heating the vehicle molding material.

  Further, in the present invention, the fixed curved portion having a concave curved shape, the first position having a linear shape and following the fixed curved portion, and the non-continuous to the fixed curved portion. A movable linear portion movable between a second position spaced apart from the second position, a biasing portion that biases the movable linear portion from the second position toward the first position, and the movable linear portion. The bending tool for the vehicular molding material provided with the clamp portion for clamping the vehicular molding material is employed.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the molding material for vehicles which can be curved in a concave shape without leaving a trace on a design surface is obtained. Moreover, according to this invention, the bending process jig | tool of the molding material for vehicles which can be curved in a concave shape without leaving a trace in a design surface is obtained.

It is a figure which shows the door panel to which the molding material for vehicles in embodiment of this invention was attached. It is a perspective view which shows the non-exposed surface side of the molding material for vehicles in embodiment of this invention. It is a perspective view which shows the bending process jig | tool of the molding material for vehicles in embodiment of this invention. It is a perspective view which shows the time of the movement of the bending process jig | tool in embodiment of this invention. It is a figure which shows the clamp state of the molding material for vehicles in the arrow AA cross section in FIG. It is a flowchart for demonstrating the manufacturing method of the molding material for vehicles in embodiment of this invention. It is a figure for demonstrating the bending process using the bending jig in embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description, a long vehicular molding material attached to a door panel at the rear of the vehicle will be exemplified.

(Vehicle molding materials)
FIG. 1 is a diagram showing a door panel 100 to which a vehicle molding material 1 according to an embodiment of the present invention is attached. FIG. 2 is a perspective view showing the non-exposed surface 2b side of the vehicle molding material 1 according to the embodiment of the present invention.

  As shown in FIG. 1, a vehicular molding material 1 is attached to a door panel 100 of the present embodiment. The vehicular molding material 1 has a design surface 2a for decoration purposes. The vehicular molding material 1 is attached along the concave curved portion 101 of the door panel 100 so that the design surface 2a is exposed to the outside. The vehicular molding material 1 (design surface 2 a) has a shape curved in a concave shape along the curved portion 101.

  As shown in FIG. 2, weather strips 3a and 3b for draining water are provided on the non-exposed surface 2b side of the vehicle molding material 1 of the present embodiment. The weather strips 3 a and 3 b are provided to extend in parallel along the longitudinal direction of the molding body 4. The weather strip 3b has a cutout portion 5 that is partially cut out near the position where the bending of the molding body 4 starts.

  The weather strips 3 a and 3 b are formed integrally with the molding body 4. The vehicular molding material 1 of this embodiment is formed of a resin material having thermoplasticity. More specifically, the vehicular molding material 1 is made of, for example, hard or soft polyvinyl chloride having thermoplasticity.

(Vehicle molding material bending jig)
FIG. 3 is a perspective view showing the bending jig 10 of the vehicle molding material 1 according to the embodiment of the present invention. FIG. 4 is a perspective view showing when the bending tool 10 according to the embodiment of the present invention is movable. FIG. 5 is a view showing a clamped state of the vehicular molding material 1 in the cross section taken along the line AA in FIG.

As shown in FIG. 3, the bending jig 10 includes a fixed bending portion 20, a movable linear portion 30, an urging portion 40, and a clamp portion 50.
The fixed bending portion 20 has a concave curved shape corresponding to the concave curved portion 101 of the vehicle. The fixed curved portion 20 of the present embodiment is a plate material having a curved support surface 21 curved in a concave shape on the end surface. The fixed bending portion 20 is fixed to the base 11 at a right angle.

  The movable linear part 30 has a linear shape. The movable linear portion 30 of the present embodiment is a long rectangular plate material having a linear linear support surface 31 on the end surface. The movable linear portion 30 is arranged on the base 11 at a position that is in a straight line with the fixed bending portion 20 in plan view, and the side facing the fixed bending portion 20 is an inclined surface. The movable linear portion 30 is provided with a rotation shaft 32 at the end opposite to the side facing the fixed bending portion 20, and is configured to be rotatable about the rotation shaft 32 with respect to the base 11. ing.

  The movable linear portion 30 is provided with a guide plate 33 at the end facing the fixed bending portion 20. The guide plate 33 is disposed so as to sandwich the fixed bending portion 20 in the plate thickness direction. Further, the movable linear portion 30 is provided with a flange portion 34 that is urged by an urging portion 40 to be described later, at an end portion facing the fixed bending portion 20.

The movable linear portion 30 having the above-described configuration has a first position (see FIG. 3) that follows the fixed bending portion 20 and a second position that is spaced apart from the fixed bending portion 20 (see FIG. 4). (See)).
When the movable linear portion 30 is located at the first position, as shown in FIG. 3, the linear support surface 31 is smoothly connected to the curved support surface 21 of the fixed curved portion 20, and cooperates to form a continuous support surface. Form.
On the other hand, when the movable linear portion is located at the second position, as shown in FIG. 4, the linear support surface 31 is discontinuous with the curved support surface 21 of the fixed curved portion 20, and a step is generated, and the support is separated. It becomes a surface.

  The urging portion 40 is configured to urge the movable linear portion 30 from the second position toward the first position. The urging unit 40 includes a guide pin 41 and a coil spring 42. The guide pin 41 is erected with respect to the base 11 through the flange portion 34. The coil spring 42 is provided between the distal end portion of the guide pin 41 and the flange portion 34. The coil spring 42 is a compression spring and expresses a biasing force that presses the movable linear portion 30 against the base 11 even in the normal state shown in FIG. 3.

  The clamp part 50 is provided on the movable linear part 30. As shown in FIG. 5, the clamp portion 50 of the present embodiment is configured to clamp the vehicle molding material 1 with the movable linear portion 30. Specifically, in the present embodiment, a nose lock type spring plunger in which the nose 52 can be taken in and out by pushing and pulling the knob 51 is employed as the clamp portion 50.

  The molding body 4 has a substantially U shape in sectional view. When in the clamped state, the movable linear portion 30 is disposed along the substantially U-shaped groove 4 a of the molding body 4. On the other hand, the nose 52 is disposed outside the groove 4a of the molding body 4 so as to be able to press the non-exposed surface 2b. Note that. The pressing position of the nose 52 corresponds to the formation position of the notch 5 of the weather strip 3b. For this reason, when the vehicle molding material 1 is in a clamped state, only the non-exposed surface 2b is pressurized (clamped) by the clamp portion 50.

(Manufacturing method of vehicle molding material)
FIG. 6 is a flowchart for explaining a method for manufacturing a vehicular molding material in the embodiment of the present invention. FIG. 7 is a view for explaining a bending process using the bending jig 10 in the embodiment of the present invention.

  As shown in FIG. 6, in this manufacturing method, an extrusion process (step S1), a notch process (step S2), an installation process (step S3), and a heating process (step S4) are sequentially performed. Steps S2 to S4 correspond to the bending process according to the present manufacturing method.

The extrusion molding step (step S1) is a step of continuously extruding the vehicle molding material 1 from the extrusion molding machine and cutting it at predetermined lengths.
By this extrusion molding process (step S1), the linear vehicle molding material 1 in which the weather strips 3a and 3b, the molding body 4 and the like are integrally molded is obtained. The linear vehicular molding material 1 is curved into a concave shape through a subsequent bending process (steps S2 to S4).

The notch process (step S2) is a process performed prior to the installation process (step S3), and forms a portion where the clamp part 50 is clamped by notching a part on the non-exposed surface 2b side of the vehicle molding material 1. It is a process to do.
By this notch process (step S2), a notch part 5 (see FIG. 2) is formed by notching a part of the weather strip 3b on the non-exposed surface 2b side and clamping the clamp part 50. The weather strip 3b is made of polyvinyl chloride and can be easily cut out.

The installation step (step S3) is a step of installing the vehicle molding material 1 on the bending jig 10.
In this installation step (step S3), as shown in FIG. 7A, the vehicle molding material 1 is installed on the bending jig 10 so as to straddle both the fixed bending portion 20 and the movable linear portion 30. . Specifically, first, the movable linear portion 30 is moved from the first position shown in FIG. 3 to the second position shown in FIG. 4 against the urging force of the urging portion 40. Next, the vehicle molding material 1 is clamped to the movable linear portion 30 using the clamp portion 50.

  Specifically, as shown in FIG. 5, the molding body 4 is disposed so as to straddle the linear support surface 31 of the movable linear portion 30, the knob 51 is operated, and the nose 52 is moved by urging a spring (not shown). The notch 5 is pressed. As a result, a part of the molding body 4 on the non-exposed surface 2 b side that is not the design surface 2 a is sandwiched and clamped between the nose 52 and the movable linear portion 30. When the hand is released after this clamping and the force against the urging of the urging portion 40 is released, the urging force of the urging portion 40 acts on the molding material 1 for the vehicle, and the non-exposed surface of the molding material 1 for the vehicle. The load is applied to 2b.

A heating process (step S4) is a process of heating the molding material 1 for vehicles.
In this heating step (step S4), as shown in FIG. 7A, the vehicle molding material 1 having thermoplasticity installed in the bending jig 10 is put together with the bending jig 10 in a heating furnace. Heat. When the vehicle molding material 1 is softened by heating, the bending rigidity of the vehicle molding member 1 trying to maintain the state shown in FIG. 7 (a) is reduced, and the vehicle is curved along the fixed bending portion 20 as shown in FIG. 7 (b). Processed.

  Specifically, when the urging force of the urging portion 40 overcomes the bending rigidity of the vehicular molding material 1 due to the softening, the movable linear portion 30 gradually moves from the second position to the first position. . When the movable linear portion 30 moves to the first position, the curved curved support surface 21 and the linear support surface 31 form a continuous support surface following the fixed curved portion 20 and the movable linear portion 30 so as to be continuous. The continuous support surface has a concave shape corresponding to the curved portion 101, and the vehicle molding material 1 is attracted along the curved support surface 21 and deformed to be bent into a concave shape. Thereafter, the vehicle molding material 1 is taken out of the heating furnace, cooled, and the clamp 50 is released from the clamp, whereby the vehicle molding material 1 having the concave design surface 2a is obtained (see FIG. 1).

  In this way, by installing the vehicle molding material 1 on the bending jig 10 and applying a load to the non-exposed surface 2b, the design surface 2a is recessed without leaving a pressure trace on the design surface 2a. Can be curved. For this reason, the risk that the appearance of the vehicular molding material 1 may be damaged by the bending process can be minimized. Moreover, in this embodiment, since one point of the clamp part 50 is made into the fulcrum, the molding material 1 for vehicles can be bent easily. Further, in the present embodiment, since the weather strip 3b is partially cut away, the vehicular molding material 1 can be easily bent by the cutout portion 5, and the clamping by the clamp portion 50 is also easy. Can be made.

  Therefore, according to the above-described embodiment, in the method of manufacturing the vehicular molding material 1 attached so that the design surface 2a is exposed along the concave curved portion 101 of the vehicle, the non-exposed surface of the vehicular molding material 1 is used. By applying a technique of adding a load to 2b and bending the design surface 2a in a concave shape so as to correspond to the curved portion 101 (steps S2 to S4), traces are displayed on the design surface. The manufacturing method of the molding material 1 for vehicles which can be curved in a concave shape without leaving in 2a is obtained. Moreover, according to this embodiment, the bending jig | tool 10 of the molding material 1 for vehicles which can be curved in a concave shape without leaving a trace in the design surface 2a is obtained.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the present embodiment, the vehicular molding material 1 having the weather strips 3a and 3b has been described as an example. (Step S2) is not necessarily required.

Further, for example, in the present embodiment, the heating process (step S4) is performed after the installation process (step S3). As a result, the vehicular molding material 1 is heated in the state of being installed on the bending jig 10. Therefore, it does not matter before and after the heating timing.
Further, when the vehicle molding material 1 is formed of a material that can be plastically deformed only by the urging force of the urging unit 40, the heating step (step S4) is not necessarily required.

  DESCRIPTION OF SYMBOLS 1 ... Molding material for vehicles, 2a ... Design surface, 2b ... Non-exposed surface, 5 ... Notch part, 10 ... Curve processing jig, 20 ... Fixed curved part, 30 ... Movable linear part, 40 ... Energizing part, 50 ... Clamping part, S2 ... Notch process (curving process), S3 ... Installation process (curving process), S4 ... Heating process (curving process), 101 ... Curving part

Claims (4)

In the method of manufacturing a molding material for a vehicle that is attached so that the design surface is exposed along the concave curved portion of the vehicle,
By adding a load to the non-exposed surface of the vehicle molding material, the design surface have a curving step of concavely curved so as to correspond to the curved portion,
The bending process includes an installation process of installing the vehicle molding material on a bending jig,
The bending jig is
A fixed curved portion having a concave curved shape corresponding to the curved portion;
A movable linear portion having a linear shape and movable between a first position following the fixed curved portion and a second position spaced apart from the fixed curved portion; and
A biasing portion that biases the movable linear portion from the second position toward the first position;
A method of manufacturing a vehicular molding material , comprising: a clamp portion that is provided on the movable linear portion and clamps the vehicular molding material. Prior to the installation step, the bending step includes a notch step of notching a part of the vehicle molding material on the non-exposed surface side to form a portion to be clamped by the clamp portion. The manufacturing method of the molding material for vehicles of Claim 1 . The vehicle molding material has thermoplasticity,
The method of manufacturing a vehicular molding material according to claim 1 , wherein the bending step includes a heating step of heating the vehicular molding material. A fixed curved portion having a concave curved shape;
A movable linear portion having a linear shape and movable between a first position following the fixed curved portion and a second position spaced apart from the fixed curved portion. When,
A biasing portion that biases the movable linear portion from the second position toward the first position;
A bending tool for a vehicular molding material, comprising: a clamp portion that is provided on the movable linear portion and clamps the vehicular molding material.

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