JP2008183847A - Molding method of master model for molds - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding method which enables an easy manufacture of a master model for a mold having a complicated shape while laminating integrally a plurality of sheet-like or plate-like laminating materials. <P>SOLUTION: When the master model for the mold 11 is molded while a plurality of sheets of paper having a predetermined thickness is integrally laminated as the laminating material 10, a concave groove 12 of a predetermined shape is formed in a laminating direction of the laminating material 10 or in a direction intersecting with the laminating direction. As shown in Fig.1(a), at least one or more section lines G which are previously splittable are formed in the central portion of an unnecessary shape article 13 in cutting in a groove-like form. As shown in Fig.1(b), a cut piece Ga in which the central section line G is entered is first pulled out upward from the concave groove 12, thereafter, the unnecessary shape articles 13a, 13b of both sides are sequentially slid closer to the center side in a space portion S from which the cut piece Ga is pulled out, and as shown in Fig.1(c), the unnecessary shape articles 13a, 13b are sequentially pulled out upward to form the concave groove 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a molding method of a master model for a mold, and more specifically, a groove is formed while integrally laminating a plurality of sheet-like or plate-like laminate materials, and after forming the laminate, The present invention relates to a molding method of a master model for a mold that makes it possible to easily pull out unnecessary shapes from the inside.

  Conventionally, a rapid protoype (RP) is known as a technique for manufacturing a three-dimensional model (prototype) at high speed. In this rapid protype, a three-dimensional model is directly manufactured from three-dimensional CAD data. There is a modeling method, and this additive manufacturing method is a technique in which a thin film-like or plate-like material such as powder, resin, board, paper or the like is laminated and manufactured.

  For example, as a master model for tire molds and its manufacturing method, a thin plate having the same shape as the cross-sectional shape of the tread portion obtained by slicing parallel or perpendicular to the tire equatorial plane is manufactured for each slide position. A plurality of thin plates thus obtained are sequentially stacked to obtain a master model in which the same uneven portion as the tire tread pattern is formed on the outer peripheral surface (see, for example, Patent Document 1).

  A method of modeling a three-dimensional model by a photo-curing modeling method using a resin that is cured by ultraviolet rays is also known. However, this method is excellent in dimensional accuracy and suitable for a small modeling model, but there is a problem that a large amount of equipment is required.

  On the other hand, the paper laminating method is inexpensive and can produce a large model. For example, as shown in FIGS. 4A to 4D, a U-shaped groove 2a or a zigzag groove 2b is formed in the laminated body 1. In the case where the arc-shaped recess 2c is formed in the middle of the U-shaped groove 2a, and the case where the substantially elliptical groove 2e is formed in the bottom of the straight recess 2d, FIG. A laminated body 1 in which the laminated body Wa is laminated vertically as shown in a) and (b), and a laminated body 1 in which the laminated body Wa is laminated in the horizontal direction as shown in FIGS. 6 (a) and 6 (b). When the unnecessary groove Wx is removed from the U-shaped groove 2a, the groove 2a can be easily formed by pulling out in the direction of the arrow.

However, as shown in FIGS. 4C and 4D, the laminated body 1 in which the arc-shaped concave portion 2c is formed in the middle of the U-shaped groove 2a, or a substantially elliptical shape at the bottom of the straight concave groove 2d. In the case of the laminated body 1 in which the groove 2e is formed, it is difficult to remove the unnecessary material Wx by pulling it upward from the groove 2a or the concave groove 2d. There was a problem that the direction was unsuitable. That is, since the width of the unwanted object Wx is larger than the groove width of the U-shaped groove 2a or the straight-shaped recessed groove 2d, the unnecessary object Wx may be removed from the side surface of the U-shaped groove 2a or the recessed groove. It has been generally said that it is caught on the side surface of 2d and the drawing operation becomes substantially difficult and cannot be performed by the paper lamination method.
Japanese Patent Application Laid-Open No. 61-181616

  The present invention pays attention to such a conventional problem, and even when a groove is formed while integrally laminating a plurality of sheet-like or plate-like laminated materials, it is easy to remove unnecessary materials in the groove. An object of the present invention is to provide a mold master model forming method that can be performed and can easily manufacture a mold master model having a complicated shape.

  In order to achieve the above object, the present invention forms a concave groove having a predetermined shape in the stacking direction of the stacking material or in the direction intersecting the stacking direction while integrally stacking a plurality of sheet-shaped or plate-shaped stacking materials. When forming a laminated body in which at least one cutting line that can be divided in advance into an unnecessary shape corresponding to the concave groove is formed, and forming the concave groove with the laminated material, the unnecessary shape is formed from within the concave groove. The gist is to sequentially pull out the wires along the cutting line.

  The laminated material may be any one of paper, resin, and metal, and the laminated body can produce a gypsum master model by a paper additive manufacturing method using three-dimensional data.

  Furthermore, the master model of the laminate can be inverted with a rubber mold to produce a gypsum mold, an aluminum casting, and a tire mold.

  As described above, the present invention can easily remove unnecessary materials in the groove when the groove is formed while integrally laminating a plurality of sheet-like or plate-like laminated materials. Therefore, it is possible to easily manufacture a master model for a mold having a complicated shape. For example, when a master model for manufacturing a mold for a tire is manufactured, the tire performance such as sound and drainage can be improved. It is possible.

  In the present invention, when a plurality of sheet-like or plate-like laminated materials are integrally laminated as described above, a groove having a predetermined shape is formed in the lamination direction of the laminated material or in a direction crossing the lamination direction. At least one cutting line that can be divided in advance into an unnecessary shape corresponding to the concave groove is formed, and after forming a laminate in which the concave groove is formed by the laminated material, the unnecessary shape is cut from the concave groove. Since it is sequentially pulled out along the line, the following excellent effects can be obtained.

(a) Unnecessary objects in the groove can be easily removed, and a master model for a mold having a complicated shape can be easily manufactured.

(b). Master model for molds with complicated shapes can be easily manufactured. For example, when a master model for manufacturing tire molds is manufactured, the tire performance such as sound and drainage is improved. It can be made.

(c) Since processing is simple, it can be manufactured at low cost and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1A to 1C are process diagrams of a paper mastering method for a master model for a mold showing a first embodiment of the present invention, and a plurality of paper sheets having a predetermined thickness are integrated as a laminated material 10. When the master model 11 for a paper laminate mold is formed while being laminated on each other, a groove 12 having a predetermined shape is formed in the lamination direction (in this embodiment, the longitudinal direction) of the lamination material 10 or in the direction intersecting the lamination direction. Is molded.

  The laminated material 10 is not limited to paper as in this embodiment, and a sheet-like or plate-like resin material or metal material can also be used.

  When the groove 12 having the predetermined shape is formed, the laminated material 10 is cut into a predetermined groove shape while being laminated one by one, but the diverging groove 12 having a diverging shape is formed as in this embodiment. In this case, after lamination to a predetermined thickness, the area of the mouth portion 12a of the groove 12 is larger than the area of the bottom portion 12b, so that the cut unnecessary shape 13 in the groove 12 can be pulled out and taken out. It becomes impossible.

  Therefore, as shown in FIG. 1A, at least one cutting line G (parting line) that can be divided in advance is formed in the center of the unnecessary shape object 13 when cutting into a groove shape (this embodiment). In FIG. 1B, two molds are formed at the center, but the number is not limited.) After molding the master model 11 for a mold composed of a laminated body in which the concave groove 12 is formed by the laminated material 10, as shown in FIG. First, the cut piece Ga in which the central cutting line G is inserted is first drawn upward from the inside of the concave groove 12, and then the unnecessary shapes 13a and 13b on both sides are sequentially placed on the center side in the space S from which the cut piece Ga has been drawn. As shown in FIG. 1C, the unnecessary shaped objects 13a and 13b are sequentially pulled upward to form the concave grooves 12.

  Then, the mold master model 11 having such a concave groove 12 is used to invert with a rubber mold to produce a gypsum mold or an aluminum mold to produce a tire mold.

  The master model 11 for the mold of the paper laminate can also be manufactured by a paper laminate modeling method using three-dimensional data.

  2 (a) and 2 (b) show a process diagram of a paper lamination method of a master model for a mold showing a second embodiment of the present invention, and in this embodiment, it is cut into a wide groove shape. In this case, a cutting die G (parting line) is formed along the opening width H of the concave groove 12 vertically or with a draft angle, and a mold made of a laminate in which the concave groove 12 is formed by the laminated material 10. After the master model 11 is molded, the center unnecessary shape 14 is first pulled out, and then the unnecessary shapes 14a and 14b composed of small pieces on both sides are sequentially drawn toward the center side, as shown in FIG. 2 (b). The concave grooves 12 are formed by sequentially pulling 14a and 14b upward. Since other configurations and operations are the same as those in the first embodiment, description thereof is omitted.

  Next, FIGS. 3A to 3C are process diagrams of a paper mastering method for a master model for a mold showing a third embodiment of the present invention. When the master model 11 for a paper laminate mold is molded while being integrally laminated, the laminated material 10 has a predetermined shape in the laminating direction (in this embodiment, the lateral direction) or in a direction crossing the laminating direction. The concave groove 12 is formed.

  Similarly to the first embodiment, this embodiment also has a cutting line G (parting line) that can be divided in advance at the center of the unnecessary shape object 13 when cutting into a groove shape, as shown in FIG. ) At least one (in this embodiment, two are formed in the central portion, but the number is not limited), and a master model 11 for a mold made of a laminate in which concave grooves 12 are formed by the laminate material 10. After the molding, as shown in FIG. 3 (b), first, the cut piece Ga into which the central cutting line G is inserted is drawn upward from the inside of the concave groove 12, and then the space portion S from which the cut piece Ga has been drawn, Unnecessary shapes 13a and 13b on both sides are sequentially drawn toward the center side, and the unnecessary shapes 13a and 13b are sequentially drawn upward to form the concave grooves 12, as shown in FIG. 3C.

  Then, the mold master model 11 having such a concave groove 12 is used to invert with a rubber mold to produce a gypsum mold or an aluminum mold to produce a tire mold.

  As described above, in the present invention, when a plurality of laminated materials 10 are integrally laminated, the concave groove 12 having a predetermined shape is formed in the lamination direction of the laminated material or in a direction crossing the lamination direction. After forming a laminated body in which at least one cutting line G that can be divided in advance is formed on the unnecessary shape object 13 corresponding to 12 and the concave groove 12 is formed by the laminated material 10, an unnecessary shape object is formed from within the concave groove 12. Since the 13 is sequentially pulled out along the cutting line G, it is possible to easily remove unnecessary materials in the groove 12, and it is possible to easily manufacture a master model for a mold having a complicated shape. Is.

  As a result, it is possible to easily manufacture a master model for a mold having a complicated shape. For example, when a master model for manufacturing a mold for a tire is manufactured, the tire performance such as sound and drainage can be improved. It is possible.

(A)-(c) is process drawing of the paper lamination method of the master model for metal mold | dies which shows 1st Embodiment of this invention. (A) And (b) is process drawing of the paper lamination method of the master model for metal mold | dies which shows 2nd Embodiment of this invention. (A)-(c) is process drawing of the paper lamination method of the master model for metal mold | dies which shows 3rd Embodiment of this invention. (A)-(d) is explanatory drawing of the ditch | groove shape formed in the conventional master model for metal mold | dies. (A), (b) is explanatory drawing in the case of extracting an unnecessary-shaped object from the laminated body which laminated | stacked the conventional laminated material on the vertical direction. (A), (b) is explanatory drawing in the case of extracting an unnecessary shape from the laminated body which laminated | stacked the conventional laminated material sideways.

Explanation of symbols

10 Laminate Material 11 Master Model for Mold 12 Groove 12a Mouth 12b Bottom 13 Unnecessary Shape
G cutting line Ga cutting piece
S space part 13a, 13b unnecessary shape

Claims (4)

  When a plurality of sheet-like or plate-like laminated materials are integrally laminated, and when a groove having a predetermined shape is formed in the lamination direction of the laminated material or in a direction crossing the lamination direction, there is no need to correspond to the groove. Forming at least one cutting line that can be divided in advance into a shaped object, forming a laminated body in which a concave groove is formed by the laminated material, and sequentially drawing unnecessary shaped objects from the concave groove along the cutting line. A molding method of a master model for a mold.   The molding method of a master model for a mold according to claim 1, wherein the laminated material is any one of paper, resin, and metal.   The molding method for a master model for a mold according to claim 1 or 2, wherein the laminate is manufactured by a paper additive manufacturing method using three-dimensional data.   4. The molding method of a master model for a mold according to claim 1, wherein the master model of the laminate is inverted with a rubber mold to produce a gypsum mold, an aluminum casting, and a tire mold.

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