JP5445817B2 - Substrate cutting device and substrate cutting method - Google Patents

Description

  The present invention relates to a substrate cutting apparatus and a substrate cutting method.

2. Description of the Related Art Conventionally, in a molding apparatus that molds a trim material such as a door trim of a vehicle, a molding apparatus that includes a cutting device that presses a base material before molding and cuts an unnecessary portion of the outer periphery of the base material is known. As shown in FIG. 13, such a molding apparatus includes an upper mold 110 and a lower mold 120, and a molding space 130 for molding a trim material is formed between the upper mold 110 and the lower mold 120. ing. In addition, a pair of edge portions 111 and 121 serving as cutting blades are formed at the mating portion of the upper and lower molds 110 and 120 at the end of the molding space 130. The molding method using this molding apparatus will be briefly described. First, the base material 100 before molding is set on the lower mold 120, and pressing is started. In the press start state, the outer peripheral unnecessary portion 101 of the base material 100 protrudes from the end of the molding space 130. As shown in FIGS. 14 and 15, when the upper and lower molds 110 and 120 are further pressed, the base material 100 is formed into a predetermined shape, and the outer peripheral unnecessary portion 101 becomes both edge portions 111 and 121. Disconnected by. As such a molding apparatus, for example, a molding apparatus described in Patent Document 1 below is known.
JP 2002-254461 A

  However, if the upper mold 110 and the lower mold 120 are not sufficiently aligned, or if the clearance between the edge portions 111 and 121 is increased due to wear of the edge portions 111 and 121, the base material 100 remains uncut. It is extended between both edge parts 111 and 121, and this extended part tends to remain as a burr at the outer peripheral terminal of the substrate 100. Then, if the skin is pasted with burrs left, the outer skin of the product is broken and becomes a waste product. Therefore, it is necessary to perform deburring work before pasting the skin. However, it is extremely difficult to completely eliminate the waste product because the appearance of the burrs is overlooked in the appearance inspection during the deburring operation, and the deburring operation also varies.

  The present invention has been completed on the basis of the above circumstances, and prevents the generation of burrs when trimming unnecessary portions of the base material in trim molding, and improves the productivity by eliminating the need for deburring operations. The purpose is to improve the quality of the outer peripheral part of the product.

  The present invention is a base material cutting device for cutting an unnecessary outer peripheral portion of a base material pressed by a molding die for forming a trim material and protruding outside from an end portion of a forming space, and tension is applied to the unnecessary outer peripheral portion. A structure provided with a tension applying means for applying, and a cutting blade for cutting the unnecessary outer peripheral portion in a state where the tension is applied by the tension applying means by moving along the surface of the outer surface of the mold that is in contact with the unnecessary outer peripheral portion. It has the characteristics.

  Further, the present invention is a method for cutting a base material that cuts an outer peripheral unnecessary portion that protrudes outside from an end portion of a molding space among base materials pressed by a molding die for molding a trim material, and includes a tension applying unit. A tension applying step for applying tension to the outer periphery unnecessary portion, and an outer periphery unnecessary portion in a state where the tension is applied by the tension applying means by moving the cutting blade along the surface of the outer surface of the mold that contacts the outer periphery unnecessary portion. It is good also as a cutting method of a substrate provided with a cutting process to cut.

  In this way, the unnecessary outer peripheral portion can be cut by the cutting blade in a state where tension is applied to the unnecessary outer peripheral portion by the tension applying means, so that the cutting blade is in contact with the outer peripheral surface of the mold that is in contact with the outer peripheral unnecessary portion. There is no possibility that an unnecessary portion of the outer periphery is caught between the two and the occurrence of burrs can be prevented. Therefore, it is possible to improve the productivity by eliminating the deburring operation and improve the quality of the outer peripheral portion of the product.

The following configuration is preferable as an embodiment of the present invention.
It is good also as a structure provided with the pin which pierces the outer periphery unnecessary part cut | disconnected by the cutting blade, and removes an outer periphery unnecessary part from a shaping | molding die by moving to a direction away from a shaping | molding die with a cutting blade and tension | tensile_strength provision means.
Further, a removal step of removing the unnecessary outer peripheral portion from the molding die by piercing the pin into the unnecessary outer peripheral portion cut in the cutting step and moving the pin in a direction away from the molding die together with the cutting blade and the tension applying means is provided. It is good also as a cutting method of a substrate.
If it does in this way, a pin can be stabbed in the outer periphery unnecessary part after a cutting | disconnection, and it can remove from a shaping | molding die.

The tension applying means may be configured to remove the unnecessary outer peripheral portion from the pin by moving relative to the pin where the unnecessary outer peripheral portion is stuck.
Further, in the removing step, the outer peripheral unnecessary portion may be removed from the pin by relatively moving the pin stuck with the outer peripheral unnecessary portion and the tension applying means.
If it does in this way, the outer periphery unnecessary part stabbed in the pin can be removed easily.

The tension applying means may be configured to press the plate against the outer periphery unnecessary portion and push it in the cutting direction of the cutting blade.
If it does in this way, since an outer periphery unnecessary part can be cut | disconnected by moving a cutting blade in the pushing direction, pushing an unnecessary outer periphery part with a plate, generation | occurrence | production of a burr | flash can be prevented reliably.

  According to the present invention, it is possible to prevent the generation of burrs at the time of cutting unnecessary portions of the base material in trim molding, improve the productivity by eliminating the deburring operation, and improve the quality at the outer peripheral portion of the product. be able to.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. FIG. 1 is a cross-sectional view showing a molding apparatus 1 according to this embodiment. The molding apparatus 1 has a base 10, and a lower mold 3 is installed at the center of the upper surface of the base 10. A pair of cutting devices 5 are installed on both sides of the lower mold 3 on the upper surface of the base 10. A top plate 7 is installed at a position facing the upper surface of the base 10, and an upper mold 4 is installed in the center of the lower surface of the top plate 7 so as to protrude downward. In addition, a plurality of hydraulic cylinders 6 are erected on the outer peripheral side of the cutting device 5 on the upper surface of the base 10, and the top plate 7 can be moved up and down while maintaining a parallel posture with the base 10 by these hydraulic cylinders 6. It is supported. The upper and lower molds 3 and 4 correspond to the “molding die” in the present invention.

  The molding apparatus 1 is a molding apparatus for molding a trim material such as a door trim of a vehicle, and the upper and lower molds 3 and 4 are closed between the upper surface of the lower mold 3 and the lower surface of the upper mold 4 when the mold is closed. A molding space S for molding the trim material is formed. That is, when the base material 8 before being formed into the trim material is placed on the lower mold 3 and the upper and lower molds 3 and 4 are closed and pressed, the base material 8 is formed into a predetermined shape. Specifically, the main body portion of the trim material is formed by the central portion 12 that forms the central portion of the molding space S, and the outer peripheral vertical wall portion of the trim material is formed by the outer peripheral end portion 13 that forms the outer peripheral portion of the molding space S. Molded.

In addition, the base material 8 mixes fiber materials, such as kenaf, and polypropylene resin with a blender, and then preforms a mat formed by a former, or a preform formed from the mat, and then forms the preform. Heated again. The basis weight of the base material 8 is about 0.5 to 2.0 Kg / m ^2, and the density of the base material 8 is about 0.5 to 1.0 g / cm ³ .

  In both the upper and lower molds 3 and 4 in the mold closed state, a cutting recess 11 is provided at a position corresponding to each cutting device 5. This cutting recess 11 cuts an unnecessary outer peripheral portion 81 of the base material 8 that protrudes from the outer peripheral end 13 of the molding space S into the cutting recess 11 when a cutting blade 51 described later of the cutting device 5 enters. It is a space provided in The cutting recess 11 communicates with the molding space S, and the outer peripheral unnecessary portion 81 of the substrate 8 pressed inside the molding space S is an upper surface (referred to as “molding die” in the present invention) constituting the cutting recess 11. This corresponds to the surface of the outer surface of which the outer peripheral unnecessary portion is in contact with. ”) It is configured to fall into the cutting recess 11 from 11A.

  The cutting device 5 includes a cutting blade 51 that moves along the upper surface 11A constituting the cutting recess 11, a main body 52 that supports the cutting blade 51 so as to be movable, a plate 53 that moves independently of the cutting blade 51, and the like. I have. The outer peripheral unnecessary portion 81 of the base material 8 is cut by moving the cutting blade 51 from the outside to the inside of the cutting recess 11 and being sheared between the cutting blade 51 and the outer peripheral end portion 13 of the molding space S. . Drive means for driving the cutting blade 51 is provided inside the main body 52. In addition, the drive means in this embodiment is connected with the cutting blade 51 via the rod 55, and is comprised by the hydraulic cylinder etc.

  In this embodiment, the plate 53 is connected to the cutting blade 51, and acts to push the unnecessary outer periphery 81 into the depth of the cutting recess 11 prior to the cutting of the unnecessary outer periphery 81 by the cutting blade 51. The plate 53 can be moved in the cutting direction of the cutting blade 51 by a driving means constituted by a system different from the driving means of the cutting blade 51. The driving means for the plate 53 is connected to the plate 53 via a plunger 56, and is constituted by an air cylinder or the like. The plate 53 and the driving means for the plate 53 constitute “tension applying means” in the present invention.

  For this reason, when the cutting blade 51 is moved and the outer peripheral unnecessary portion 81 is cut, the unnecessary outer peripheral portion 81 can be held in a state of being pushed by the plate 53 with a constant pressing force. Therefore, it is possible to prevent the outer peripheral unnecessary portion 81 from being caught between the cutting blade 51 and the upper surface 11A constituting the cutting recess 11. Therefore, by suppressing the occurrence of burrs, the deburring inspection can be eliminated and the productivity can be improved, and the quality at the outer peripheral portion of the trim material can be improved.

  The present embodiment has the above-described structure, and the operation thereof will be described subsequently. First, as shown in FIG. 2, the base material 8 before molding is set on the lower mold 3 in a state where the upper and lower molds 3 and 4 are opened. At this time, the cutting blade 51 is kept at the initial position retracted to the outside of the cutting recess 11. From this state, when the upper mold 4 is lowered toward the lower mold 3 and the upper mold 4 reaches the bottom dead center, the base material 8 is molded into the trim material in the molding space S as shown in FIG. The outer peripheral unnecessary portion 81 is in a state of falling from the outer peripheral end 13 of the molding space S into the cutting recess 11.

  Thereafter, the plate 53 is moved into the cutting recess 11 and, as shown in FIG. 4, the outer periphery unnecessary portion 81 is pushed into the cutting recess 11 to be in a tensioned state (tension applying step). . Then, the cutting blade 51 is moved from the outside to the inside of the cutting recess 11 with the tension applied to the outer peripheral unnecessary portion 81, and when the cutting blade 51 reaches the cutting position shown in FIG. The outer peripheral unnecessary portion 81 is cut by shearing with the outer peripheral end 13 of the space S (cutting step). After completion of the molding, the molded product is removed from the mold, and the cutting blade 51 is moved to the outside of the cutting recess 11 (in the direction away from the upper and lower molds 3 and 4) as shown in FIG. In preparation for carrying in, the cutting blade 51 is made to stand by at an initial position.

  As described above, in this embodiment, prior to the cutting of the outer peripheral unnecessary portion 81 by the cutting blade 51, the outer peripheral unnecessary portion 81 can be pushed into the depth of the cutting recess 11 by the plate 53, so that a tension is applied. It is possible to prevent the portion 81 from being caught between the cutting blade 51 and the upper surface 11 </ b> A constituting the cutting recess 11 to generate burrs. Therefore, it is possible to improve the productivity by eliminating the deburring operation and improve the quality of the outer peripheral portion of the product.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to the drawings of FIGS. The cutting device 9 in the present embodiment is obtained by adding a pin 54 to the cutting device 5 in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and other overlapping configurations. Will not be described. FIG. 1 is a cross-sectional view showing the molding apparatus 2 in the present embodiment, and the pin 54 is provided so as to protrude from the cutting blade 51 to the cutting recess 11 side. A plate facing surface 14 is formed at a position facing the plate 53 on the inner wall constituting the cutting recess 11, and the tip of the pin 54 when the cutting blade 51 is at the cutting position is formed on the plate facing surface 14. A pin receiving recess 15 for receiving the portion is provided in a recessed manner.

  Next, the operation of this embodiment will be described. First, as shown in FIG. 8, the base material 8 before molding is set on the lower mold 3 in a state where the upper and lower molds 3 and 4 are opened. Next, the upper mold 4 is lowered toward the lower mold 3, and after the upper mold 4 reaches the bottom dead center, the plate 53 is moved into the cutting recess 11, and no outer periphery is required as shown in FIG. The portion 81 is pushed into the depth of the cutting recess 11 to apply tension (tension applying step).

  And the outer periphery unnecessary part 81 is cut | disconnected by moving the cutting blade 51 to the inside from the exterior of the recessed part 11 for a cutting | disconnection, with the tension | tensile_strength applied to the outer periphery unnecessary part 81. FIG. Thereafter, the outer periphery unnecessary portion 81 cut by the cutting blade 51 is sandwiched between the plate 53 and the plate facing surface 14, and the pin 54 pierces the outer periphery unnecessary portion 81 as the cutting blade 51 moves. When the cutting blade 51 reaches the cutting position in this way, as shown in FIG. 10, the tip end portion of the pin 54 penetrates the outer peripheral unnecessary portion 81 and is accommodated in the pin accommodating recess 15.

  Next, after releasing the pushing to the outer peripheral unnecessary portion 81, as shown in FIG. 11, when the cutting blade 51 is moved to the initial position, the pin 54 is also moved to the outside of the cutting recess 11. . Here, the tip portion of the pin 54 is formed in an undercut shape, and the pin 54 can be pulled out to the outside of the cutting recess 11 while the outer peripheral unnecessary portion 81 passes therethrough. It can be removed from the inside of the recess 11 for use. Further, after the cutting blade 51 reaches the initial position, as shown in FIG. 12, only the plate 53 is moved to the cutting recess 11 side (by moving the plate 53 relative to the pin 54). The outer peripheral unnecessary portion 81 can be removed from the pin 54 (removal step). After the outer periphery unnecessary portion 81 is removed, the plate 53 is moved again to the original position and is put on standby in preparation for the next loading of the base material 8.

  As described above, in the present embodiment, the unnecessary outer peripheral portion 81 cut by the cutting blade 51 can be forcibly removed from the cutting recess 11 by the pin 54 and only the plate 53 is moved to the cutting recess 11 side. Thus, the outer peripheral unnecessary portion 81 can be removed from the pin 54. Therefore, it is not necessary to remove the outer peripheral unnecessary portion 81 by hand, and the productivity can be further improved as compared with the first embodiment.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the present embodiment, a pressing mechanism using the plate 53 is exemplified as the tension applying means. However, according to the present invention, the outer peripheral unnecessary portion 81 is gripped with a clamp or the like and then moved to the back of the cutting recess 11. You may give tension by.

  (2) In the present embodiment, the cutting method of the cutting blade 51 is exemplified by shearing. However, according to the present invention, the outer peripheral unnecessary portion 81 is sharpened with the tension applied by the tension applying means. You may cut | disconnect using a knife etc.

  (3) Although the hydraulic cylinder is used as the driving means of the cutting blade 51 in the present embodiment, an electric motor or the like may be used according to the present invention. In this embodiment, an air cylinder is used as the driving means for the plate 53. However, according to the present invention, an electric motor or the like may be used.

  (4) In this embodiment, the cutting direction by the cutting blade 51 is the horizontal direction, but according to the present invention, it may be the vertical direction.

  (5) Although the outer peripheral unnecessary portion 81 is left inside the cutting recess 11 in the first embodiment, according to the present invention, a disposal opening is provided on the lower surface constituting the cutting recess 11, You may discharge | emit the outer periphery unnecessary part 81 to the exterior of a shaping | molding die from this opening.

  (6) In the second embodiment, the pin 54 is penetrated through the outer peripheral unnecessary portion 81, but according to the present invention, it is not always necessary to penetrate, and the pin 54 is pierced into the outer peripheral unnecessary portion 81 and removed from the cutting recess 11. I can do it.

Sectional drawing of the shaping | molding apparatus in Embodiment 1. FIG. FIG. 1 is an enlarged cross-sectional view showing a state where a base material is set on a lower mold in the molding apparatus of FIG. FIG. 1 is an enlarged cross-sectional view showing a state in which an unnecessary outer peripheral portion has fallen into a cutting recess. FIG. 1 is an enlarged cross-sectional view showing a state where an outer peripheral unnecessary portion is pushed by a plate in the molding apparatus of FIG. FIG. 1 is an enlarged cross-sectional view showing a state where an outer peripheral unnecessary portion is cut in the molding apparatus of FIG. The expanded sectional view which showed the state which the cutting blade returned to the initial position in the shaping | molding apparatus of FIG. Sectional drawing of the shaping | molding apparatus in Embodiment 2. FIG. The expanded sectional view which showed the state which set the base material to the lower mold | type in the shaping | molding apparatus of FIG. The expanded sectional view which showed the state by which the outer periphery unnecessary part was pushed in with the plate in the shaping | molding apparatus of FIG. The expanded sectional view which showed the state which stabbed the pin in the unnecessary outer periphery cut | disconnected in the shaping | molding apparatus of FIG. The expanded sectional view which showed the state which returned the cutting blade to the initial position in the shaping | molding apparatus of FIG. 8, and removed the outer periphery unnecessary part from both upper and lower mold | types The expanded sectional view which showed the state which moved only the plate in the shaping | molding apparatus of FIG. 8, and removed the outer periphery unnecessary part from the pin Sectional view showing the state where the base material before molding is set in the lower mold in the past Sectional drawing which showed the state in the middle of cutting an unnecessary outer periphery part with a cutting blade in the past Sectional drawing which showed the state by which the base material was shape | molded in the predetermined shape conventionally

Explanation of symbols

1, 2 ... Molding device 3 ... Lower mold (mold)
4 ... Upper mold (molding mold)
5, 9 ... Cutting device 8 ... Base material 11A ... Upper surface constituting the cutting recess (surface on which the outer peripheral unnecessary portion of the outer surface of the mold contacts)
13 ... Outer peripheral end of molding space 51 ... Cutting blade 53 ... Plate (tension applying means)
54 ... Pin 81 ... Unnecessary outer periphery S ... Molding space

Claims (4)

A base material cutting device that cuts an unnecessary outer peripheral portion that protrudes outside from an end portion of a molding space among base materials pressed by a molding die for molding a trim material,
Tension applying means for applying tension to the outer periphery unnecessary portion;
A cutting blade that cuts the unnecessary outer periphery in a state where the tension is applied by the tension applying means by moving along the surface of the outer surface of the mold that is in contact with the unnecessary outer periphery;
The tension applying means is configured to press a plate movable along the cutting direction of the cutting blade against the unnecessary portion of the outer periphery and press the plate into the recess formed in the mold .
A pin for piercing the unnecessary portion cut by the cutting blade and removing the unnecessary portion from the forming die by moving in a direction away from the forming die together with the cutting blade and the plate;
The plate is configured to be able to sandwich the outer periphery unnecessary portion between the back surface of the recess,
The pin is configured to be able to pierce the unnecessary portion of the outer periphery in a state of being sandwiched between the plate and the back surface,
The base material cutting device in which a pin housing recess for housing a tip portion of the pin penetrating the outer periphery unnecessary portion is formed on the back surface of the recess . The base material cutting device according to claim 1, wherein the plate moves relative to the pin where the outer peripheral unnecessary portion has pierced to remove the outer peripheral unnecessary portion from the pin . A cutting method of a base material that cuts an unnecessary outer portion protruding from an end of a molding space among base materials pressed by a molding die for molding a trim material,
A tension applying step of applying tension to the outer periphery unnecessary portion by a tension applying means;
A cutting step of cutting the outer periphery unnecessary portion in a state where tension is applied by the tension applying means by moving a cutting blade along a surface of the outer surface of the mold that is in contact with the outer periphery unnecessary portion,
The tension applying means is configured to press a plate movable along the cutting direction of the cutting blade against the unnecessary portion of the outer periphery and press the plate into the recess formed in the mold.
A removal step of removing the unnecessary outer periphery from the molding die by piercing a pin into the unnecessary outer periphery cut in the cutting step and moving the pin in a direction away from the molding die together with the cutting blade and the plate. With
In the removing step, the pin is pierced with respect to the outer periphery unnecessary portion in a state where the outer periphery unnecessary portion is sandwiched between the back surface of the recess and the plate,
The cutting method of the base material by which the front-end | tip part of the said pin which penetrated the said outer periphery unnecessary part is accommodated in the pin accommodation recessed part formed in the said back surface of the said recessed part . The base material cutting according to claim 3, wherein the removing step further removes the unnecessary outer peripheral portion from the pin by relatively moving the pin and the plate where the unnecessary outer peripheral portion has pierced. Method.

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