JP2007320167A - Apparatus and method for press molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press molding apparatus which enables molding of an irregular pattern with high precision by preventing a molding from being raised with the molding still adhered to one of upper half molds on mold opening. <P>SOLUTION: The operation of the press molding apparatus comprises putting a molding material 3 in a tray 5 for molding of a reverse V-shaped cross-section, mounting the tray 5 on a bottom mold 1, clamping an upper mold 2 to press the molding material 3 on the upper mold 2 for molding of a reverse V-shaped cross-section so as to mold a molding 6 and opening the mold to release the molding face 4 of the upper mold 2 from the molding 6. The upper mold 2 is composed of a pair of upper half molds 7a and 7b formed by dividing the upper mold 2 with the top of the molding face 4 for molding of a reverse V-shaped cross-section as the division point. The apparatus has an upper mold operation mechanism 17 which moves the upper half molds 7a and 7b obliquely upward in the direction perpendicular to the molding face 4 to release the molding face 4 from the molding 6, on opening of the upper mold 2, and a tray pressing mechanism 18 pressing the upper surface of the tray 5 when the upper mold 2 is opened to release the molding face 4 of the upper half molds 7a and 7b from the molding 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a press molding apparatus and a press molding method, which are used for molding a projecting corner decorative member used for a projecting corner of an end of a building wall or the like, using a molding material such as a cement-based molding material. It is.

  In producing a molded product 6 having a V-shaped cross section (L-shaped cross section) such as a protruding corner decorative member with the cement-based molding material 3, the molding material 3 is arranged in a protruding corner shape having an inverted V-shaped cross section. This is performed by press-molding a concavo-convex pattern on each outer surface of the protruding corner of the shaped molding material 3 and then curing and curing the molding material 3 (see, for example, Patent Document 1).

  FIG. 10 shows an example of a method of press-molding a concavo-convex pattern. First, as shown in FIG. 10 (a), the upper surface of the tray 5 having a reverse V-shaped cross section (L-shaped cross section) is cemented or the like. The molding material 3 is extruded, the molding material 3 is shaped into a protruding corner shape with an inverted V-shaped cross section, and this is placed on the lower mold 1. Next, the upper mold 2 having the pattern forming irregularities 21 on the molding surface 4 is used, and the upper mold 2 is clamped on the lower mold 1 so as to form a corner-shaped molding material as shown in FIG. By pressing the upper mold 2 against each outer surface 3, an uneven pattern 22 is press-molded on each outer surface of the molding material 3 as shown in FIG. Thereafter, as shown in FIG. 10 (d), the upper mold 2 is opened and released from the molding material 3, thereby obtaining a molded product 6 in which the concavo-convex pattern 22 is formed on each outer surface having an inverted V-shaped cross section. It can be done.

  Here, when the upper mold 2 is press-molded as described above, when the upper mold 2 is simply moved vertically in the vertical direction as shown in FIG. Since there is a need to ensure a clearance angle θ through which the pattern forming unevenness 21 is removed from the uneven pattern 22 formed in the formed product 6, the shape of the uneven pattern 22 that can be formed in the formed product 6 is limited. There is a limit to the design.

Therefore, in the case of FIG. 10, the upper mold 2 is divided into left and right sides with the top of the corner shape of the molding surface 4 as a boundary to form a pair of upper mold halves 7a and 7b, as shown in FIG. 10 (b). After each upper mold half 7a, 7b is moved in the direction perpendicular to the outer surface of the molding material 3 and press-molded, each upper mold half 7a, 7b is molded into the molding material 3 as shown in FIG. The mold is released by moving obliquely upward perpendicular to each outer surface. By doing in this way, it is possible to form a concavo-convex pattern 22 precisely matching the pattern-forming concavo-convex 21 of the upper mold 2 in the molding material 3, and the formed concavo-convex pattern 22 is not destroyed, The mold 2 can be released from the molding material 3.
JP-A-3-178404

  A molded product obtained by press-molding each outer surface of the molding material 3 using the upper mold 2 divided into two upper mold halves 7a and 7b as described above and then molding the upper mold halves 7a and 7b. When the upper mold 2 is opened from the lower mold 1 by moving it obliquely upward perpendicular to the outer surfaces of the mold 6, the molding surface of one upper mold half 7a of the pair of upper mold halves 7a, 7b 4 may be opened while the molded product 6 is still attached. Although the molding material 3 is in close contact with the surface of the tray 5, the tray 5 is merely placed on the lower mold 1, and thus the molded product 6 adheres to one upper mold half 7 a in this way. If the mold is opened as it is, the molded product 6 is lifted from the lower mold 1 together with the tray 5 as shown by the arrow A in FIG. 12 as the upper mold half 7a moves.

  When the molded product 6 together with the tray 5 is lifted along with the mold opening movement of one upper mold half 7a in this way, the molded product 6 is in the direction of the arrow with respect to the molding surface 4 of the other upper mold half 7b. The pattern forming unevenness 21 of the upper mold half 7b is caught by the uneven pattern 22 of the molded product 6, and the formed uneven pattern 22 is broken by the pattern forming unevenness 21. The accuracy of the concavo-convex pattern may deteriorate. Similarly, when the molded product 6 lifted in this way is separated from one upper mold half 7a and dropped onto the lower mold 1, the uneven pattern 22 of the molded product 6 is similarly formed on the other upper mold half. 7b, the accuracy of the uneven pattern 22 may be further deteriorated.

  The present invention has been made in view of the above points, and prevents the molded product from being lifted while adhering to one upper mold half of the upper mold when the mold is opened, and accurately forms the uneven pattern. It is an object of the present invention to provide a press molding apparatus and a press molding method that can be used.

  In the press molding apparatus according to claim 1 of the present invention, the molding material 3 is set on the tray 5 whose upper surface is formed in an inverted V-shaped cross section, and this tray 5 is placed on the lower mold 1 and the lower The upper mold 2 is clamped to the mold 1 from above, and the molding material 3 on the tray 5 is pressed with the upper mold 2 having the molding surface 4 on the lower surface formed in an inverted V-shaped cross section, thereby forming a corner-shaped molded product. In the press molding apparatus in which the upper die 2 is opened from the lower die 1 and the molding surface 4 of the upper die 2 is released from the molded product 6 after press molding, molding of the inverted V-shaped cross section is performed. The upper mold 2 is formed by a pair of upper mold halves 7a and 7b obtained by dividing the upper mold 2 into right and left with the top of the surface 4 as a boundary, and the upper mold halves 7a and 7b are opened when the upper mold 2 is opened. Is moved obliquely upward perpendicular to the molding surface 4 and released from the molded product 6, and the upper mold 2 is opened and molded. Each upper mold half 7a from 6 and is characterized by comprising a tray pressing means 18 for pressing the upper surface of the tray 5 when to release the 7b molding surface 4.

  According to the present invention, when the upper mold halves 7a and 7b are moved obliquely upward perpendicular to the molding surface 4 in order to open the upper mold 2, the upper surface of the tray 5 is held by the tray pressing means 18. Therefore, the molded product 6 can be prevented from being lifted from the lower mold 1 together with the tray 5, and the molded product 6 can be prevented from being lifted while adhering to one upper mold half 7a, 7b. Therefore, the concave-convex pattern 22 formed on the molded product 6 can be prevented from being caught by the other upper mold halves 7a and 7b and broken.

  According to a second aspect of the present invention, in the first aspect, the tray pressing means 18 is provided with a rod 19 that is driven to move in a direction parallel to a direction in which the upper mold halves 7a and 7b are released from the molded product 6. The tray pressing means 18 is provided on each of the upper mold halves 7a and 7b, and the rod 19 is moved to the tray 5 side when the upper mold halves 7a and 7b are released from the molded product 6. The tray 5 is pressed by the tip of the rod 19.

  According to the present invention, when the upper die 2 is opened and the upper die halves 7a and 7b are released from the molded product 6, the tray 5 can be pressed by the tip of the rod 19, and the molded product 6 can be pressed. Can be prevented from being lifted from the lower mold 1 together with the tray 5.

  Further, the invention of claim 3 is that in claim 1, the tray pressing means 18 is movable in a direction parallel to the direction in which the upper mold halves 7a and 7b are released from the molded product 6 and moved toward the tray 5. And a tray pressing means 18 is provided on each upper mold half 7a, 7b, and the tip of the rod 19 is pressed against the tray 5 by its elastic force. It is characterized by comprising.

  According to this invention, the rod 19 can be pressed against the tray 5 by elastic force, and when the upper die 2 is opened and the upper die halves 7a and 7b are released from the molded product 6, The molded product 6 can be prevented from being lifted from the lower mold 1 together with the tray 5.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the upper mold actuating means 17 is reciprocated in the lateral direction so that the upper mold halves 7a and 7b of the upper mold 2 are brought into contact with and separated from each other. A pair of horizontal cylinders 8, an upper mold holder 9 fixedly attached to the pair of horizontal cylinders 8, and slidably mounted in a direction in which the pair of upper mold halves 7 a and 7 b come into contact with and separate from each other, and an upper mold holder The upper cylinder 10 for reciprocating 9 in the vertical direction, and the upper mold halves 7a, 7b of the upper mold 2 and the lower mold 1 in contact with each other with the upper mold 2 clamped to the lower mold 1 The moving directions of the upper mold halves 7a and 7b by the horizontal cylinder 8 are provided respectively in the upper mold halves 7a and 7b and the lower mold 1 and perpendicular to the molding surface 4 of the upper mold halves 7a and 7b. And slide surfaces 11 and 12 that obliquely intersect each other. In a state where the upper mold halves 7a and 7b are brought into contact with each other to form the upper mold 2, the upper mold 2 is moved downward together with the upper mold holding body 9 by the upper cylinder 10 to move the upper mold 2 to the lower mold 1. The upper mold halves 7a and 7b are slid relative to the slide surface 11 of the lower mold 1 by moving the pair of upper mold halves 7a and 7b in the lateral direction away from each other by the horizontal cylinder 8. The upper mold halves 7a and 7b are moved obliquely upward perpendicular to the molding surface 4 by the slide of the surface 12, and the mold is opened.

  According to this invention, the upper mold 2 is clamped to the lower mold 1 in a state where the upper mold 2 is formed by abutting and combining the pair of upper mold halves 7a and 7b, and the molding material for the lower mold 1 is obtained. 3 is press-molded, the molding material 3 is extruded between the pair of upper mold halves 7a and 7b, and molding can be performed without generating burrs. In addition, the upper mold halves 7a, 7b of the upper mold 2 are in contact with each other while the upper mold 2 is clamped to the lower mold 1, and the molding surfaces 4 of the upper mold halves 7a, 7b are in contact with each other. The upper mold halves 7a and 7b and the lower mold 1 are respectively provided with slide surfaces 11 and 12 that are perpendicular to each other and obliquely intersect with the lateral movement direction of the upper mold halves 7a and 7b. The upper mold halves 7a and 7b are formed by sliding the slide surfaces 12 of the upper mold halves 7a and 7b with respect to the slide surface 11 of the lower mold 1 by moving the halves 7a and 7b in the lateral direction. Since the mold is opened by moving obliquely upward perpendicular to the surface 4, the upper mold 2 does not collapse the concave and convex pattern formed on the molded product 6 by the molding surface 4. Can be released from the molded product 6.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the lower mold 1 is disposed between the position immediately below the upper mold 2 and the side position of the upper mold 2. A lower mold conveying device 13 that can freely move back and forth, and a lower cylinder 14 that holds the lower mold 1 that has been moved directly below the upper mold 2 by the lower mold conveying device 13 from above the lower mold conveying device 13 are held. It is characterized by comprising.

  According to the present invention, the operation of placing the tray 5 on which the molding material 3 is set on the lower mold can be easily performed at the side position of the upper mold 2 where the upper mold 2 does not get in the way. is there.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the vibration device 15 for vibrating the upper mold 2 is provided.

  According to the present invention, when the molding material 3 is press-molded with the upper mold 2, the upper mold 2 is vibrated in this way, thereby being provided on each molding surface 4 of the upper mold halves 7 a and 7 b of the upper mold 2. Thus, the molding material 3 can be filled into every corner of the pattern forming irregularities 21 and the moldability can be improved.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the upper die 2 is provided with a large number of fine holes that open on the molding surface 4, and air suction is performed to suck air from the fine holes at the time of clamping. It is characterized by comprising means.

  According to the present invention, the molding material 3 is applied to the corners of the pattern forming irregularities 21 provided on the molding surfaces 4 of the upper mold halves 7a and 7b by sucking air from the fine holes opened in the molding surface 4. It can be filled and the moldability can be improved.

  The invention of claim 8 is characterized in that, in claim 7, an air blowing means for discharging air from the fine holes when the mold is opened is provided.

  According to the present invention, air is blown out from the fine holes opened in the molding surface 4 so that the molding material 3 does not adhere to the molding surfaces 4 of the upper mold halves 7a and 7b, and the The mold halves 7a and 7b can be released.

  The invention according to claim 9 is the invention according to any one of claims 5 to 8, wherein when the lower mold 1 is reciprocated between the position immediately below and the side position of the upper mold 2 by the lower mold conveying device 13, the lower mold The lower die 1 is provided with a release agent coating device 16 for applying a release agent to the molding surface 4 of the upper die 2 by movement of 1.

  According to the present invention, when the lower mold 1 is introduced to the lower side of the upper mold 2, the release agent can be applied to the upper mold 2 at the same time. The troublesome work is unnecessary.

  In the press molding method according to claim 10 of the present invention, the molding material 3 is placed on the tray 5 whose upper surface has an inverted V-shaped cross section, and the tray 5 is placed on the lower mold 1. By bringing the pair of upper mold halves 7a and 7b into contact with each other, the upper mold 2 in which the molding surface 4 of the lower surface is formed in an inverted V shape is moved downward, and the upper mold 2 is placed on the lower mold 1 By clamping the mold and pressing the molding material 3 on the tray 5 with the molding surface of the upper mold, a molded product 6 having a protruding corner shape is formed, and thereafter, while holding the upper surface of the tray 5, The mold halves 7a and 7b are moved obliquely upward perpendicular to the molding surface, and the upper mold 2 is opened from the lower mold 1.

  According to the present invention, when the upper mold halves 7a and 7b are moved obliquely upward perpendicular to the molding surface 4 in order to open the upper mold 2, the upper surface of the tray 5 is pressed. The product 6 can be prevented from being lifted from the lower mold 1 together with the tray 5, and the molded product 6 can be prevented from being lifted while adhering to one upper mold half 7a, 7b. It is possible to prevent the uneven pattern 22 formed on the product 6 from being caught by the other upper mold halves 7a and 7b and being destroyed.

  According to the present invention, when the upper mold halves 7 a and 7 b are moved obliquely upward perpendicular to the molding surface 4 in order to open the upper mold 2, the upper surface of the tray 5 is held by the tray pressing means 18. Therefore, the molded product 6 can be prevented from being lifted from the lower mold 1 together with the tray 5, and the molded product 6 can be prevented from being lifted while adhering to one upper mold half 7a, 7b. Therefore, it is possible to prevent the concave / convex pattern 22 formed on the molded product 6 from being caught by the other upper mold halves 7a and 7b and to be destroyed, and to accurately mold the concave / convex pattern 22 to the molded product 6. It can be done.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 7 shows the entire press molding apparatus of the present invention. A base 25 is installed on the floor of a factory or the like, and this base 25 is in a straight line from the molding area A1 to the supply / removal area A2. It is arranged in. On the upper surface of the base 25, there is provided a lower mold transfer device 13 comprising a roller conveyor formed by arranging a number of parallel rollers 26 along the entire length of the base 25 in the longitudinal direction. In the lower mold conveying device 13, portions where the rollers 26 are not provided are formed at a plurality of locations in the longitudinal direction (conveying direction) in the molding area A <b> 1, and the lower cylinder 14 is provided at each of the plurality of locations where the rollers 26 are not provided. It is fixed to the base 25.

  The lower cylinder 14 is provided on the lower side of the lower mold conveying device 13 as shown in FIGS. 2 to 5, and is formed with a cylinder rod 28 protruding upward. The rod 28 can be moved up and down. A receiving plate 29 is attached to the upper end of the cylinder rod 28. As the cylinder rod 28 moves up and down, the receiving plate 29 is moved between the upper position and the lower position from the upper surface of the roller 26 through a portion where the rollers 26 are not provided. It can be raised and lowered. A guide shaft 30 protrudes downward from the lower surface of the receiving plate 29. By inserting the guide shaft 30 into a guide sleeve 31 provided on the base 25 so as to be slidable up and down, the guide shaft 30 is stable without tilting. The receiving plate 29 is raised and lowered by guiding.

  A frame 33 is provided above the base 25 at a plurality of locations where the lower cylinders 14 are provided. The frame body 33 is disposed so as to cross the lower mold conveyance device 13 in the width direction (direction perpendicular to the conveyance direction), and is attached to the upper end of a column 34 erected on the base 25. The upper cylinder 10 is attached to the central portion of each of the plurality of frame bodies 33. The upper cylinder 10 is formed with a cylinder rod 36 protruding downward, and the cylinder rod 36 can be moved up and down by air, hydraulic pressure or the like.

  An upper mold holder 9 is attached to the lower end of the cylinder rod 36. The upper mold holder 9 includes a horizontal plate 37 disposed so as to cross the lower mold transport device 13 in the width direction (a direction perpendicular to the transport direction), and side plates 38 provided to hang from both ends of the horizontal plate 37. And the cross-sectional shape is formed in a U shape with a downward opening. On the upper surface of the horizontal plate 37, guide shafts 39 project upward on both sides of the connecting portion of the cylinder rod 36, and the guide shaft 39 is inserted into a guide sleeve 40 provided on the frame 33 slidably up and down. By wearing, the upper die holder 9 is raised and lowered by guiding it in a stable state without tilting.

  A guide rail 42 is provided on the lower surface of the horizontal plate 37 of each upper mold holder 9 so as to be linearly arranged in the width direction (direction perpendicular to the transport direction) of the lower mold transport device 13. A pair of upper mold holders 43 a and 43 b are slidably attached by a slider 46 in a suspended state. Each of the upper mold holders 43a and 43b is formed in a horizontal L-shape by providing an upper mold fixing recess 44 that opens at the opposed inner surface and lower surface. The upper mold half 7a is arranged so as to extend between one upper mold holder 43a provided on each of the plurality of upper mold holders 9, and is fitted into the upper mold fixing recess 44 of each upper mold holder 43a. By fixing, the upper mold half 7a is attached in parallel to the lower mold conveying device 13 in the molding area A1, and extends between the other upper mold holders 43b provided in the plurality of upper mold holders 9. The upper mold half 7b is disposed in the upper mold holding recesses 44 and is fitted into the upper mold fixing recess 44 and fixed in the molding area A1 in parallel with the lower mold conveying device 13 and the upper mold half 13b. An upper mold half 7b is attached in parallel with the body 7a.

  Further, the horizontal cylinders 8 are attached to the outer surfaces of the left and right side plates 38 of the upper mold holder 9, respectively. The horizontal cylinder 8 is formed with a cylinder rod 45 projecting inward through the side plate 38, and the cylinder rod 45 can be moved back and forth in the horizontal direction by hydraulic pressure, pneumatic pressure or the like. The tip of the cylinder rod 45 of the horizontal cylinder 8 provided on one side plate 38 is on the outer side surface of one upper mold holder 43a, and the tip of the cylinder rod 45 of the horizontal cylinder 8 provided on the other side plate 38 is the other side. The upper die holders 43b are respectively coupled to the outer side surfaces of the upper die holders 43b, and the upper die holders 43a and 43b can be slid in the lateral direction approaching and separating by the horizontal cylinders 8 respectively. In this way, by moving the upper mold holders 43a and 43b closer to and away from each other, the pair of upper mold halves 7a and 7b attached to the upper mold holders 43a and 43b can be moved in the lateral direction to be moved closer to and away from each other. It can be done.

  As described above, a pair of upper mold halves 7a and 7b are brought close to each other, and the opposing inner side surfaces are brought into contact with each other so that the upper mold 2 having a long shape along the lower mold conveying device 13 is formed. Is formed. The lower surfaces of the upper mold halves 7a and 7b serve as the molding surface 4. The molding surface 4 is provided with pattern forming irregularities 21 (see reference numeral 21 in FIG. 10) for molding the irregular pattern. It is. The molding surfaces 4 of the upper mold halves 7a and 7b are formed in inclined surfaces that are inclined downward at the same angle (specifically, 45 °) toward the outside, and the upper mold halves 7a and 7b are formed. The lower surface of the upper die 2 in which the two are combined is formed into a corner shape that opens downward in an inverted V-shaped cross section by the pair of inclined molding surfaces 4. Accordingly, each of the upper mold halves 7a and 7b is formed in a form in which the upper mold 2 is divided into left and right with the top of the corner shape of the molding surface 4 as a boundary. On the outer end of the molding surface 4 of 7a and 7b, a projection 48 for preventing the molding material 3 from flowing is provided. In each of the upper mold halves 7a and 7b, a slide surface 12 is formed on the outer side of the convex portion 48 as an inclined surface that is inclined obliquely upward toward the outside. In each of the upper mold halves 7a and 7b, the sliding surface 12 is set to have an inclination angle (specifically 45 °) so as to be a surface perpendicular to the respective molding surface 4. The lower surfaces of the mold halves 7a and 7b are V-shaped in section with the molding surface 4 and the slide surface 12.

  The lower mold 1 is formed to have substantially the same length as the upper mold 2, and a tray receiving convex portion 49 projects from the center of the upper surface in the width direction. The tray receiving projections 49 are formed in a protruding corner shape with an inverted V-shaped cross section corresponding to the entering corner shape formed on the lower surface of the upper mold 2, and both side surfaces of the tray receiving projection 49 are respectively formed on the upper mold half. It is formed on a surface substantially parallel to the molding surface 4 of the bodies 7a, 7b. Further, on the upper surface of the lower mold 1, on the outside of the tray receiving convex portion 49, slides as an inclined surface inclined obliquely upward toward the outside at a position directly below the slide surface 12 provided on both sides of the upper mold 2. Surface 11 is formed. The slide surface 11 is formed as a surface perpendicular to the molding surface 4 of each of the upper mold halves 7a and 7b, and is therefore parallel to the slide surface 12 of each of the upper mold halves 7a and 7b of the upper mold 2. It is a serious aspect.

  Tray pressing means 18 are provided at both ends of each of the upper mold halves 7a and 7b forming the upper mold 2. 2 to 5, the illustration of the tray pressing means 18 is omitted, and the tray pressing means 18 is illustrated and described in FIG. The tray pressing means 18 is formed by a pressing cylinder 60 provided with a rod 19, and the pressing cylinder 60 is fixedly attached to both ends of the upper mold halves 7a and 7b. The pressing cylinder 60 may be fixed directly to the end faces of the upper mold halves 7a and 7b, or may be fixed to the end face plates by attaching end face plates to the upper mold halves 7a and 7b. A pressing body 61 is attached to the tip of each rod 19, and the rod 19 is driven forward and backward by a pressing cylinder 60 that is operated by controlling hydraulic pressure or pneumatic pressure. The rod 19 provided in the upper mold half 7a is driven to move forward and backward in an oblique vertical direction perpendicular to the molding surface 4 of the upper mold half 7a, and is driven to move forward by projecting obliquely downward from the molding surface 4. . Further, the rod 19 provided on the upper mold half 7b is driven to move forward and backward in an obliquely vertical direction perpendicular to the molding surface 4 of the upper mold half 7b, and is driven to move forward by projecting obliquely downward from the molding surface 4. It is made to do.

  Next, a method for forming a molded product 6 having a V-shaped cross section (L-shaped) such as a protruding corner decorative member using the press molding apparatus of the present invention formed as described above will be described.

  As the molding material 3, for example, cement is a main raw material, and silica, reinforcing fiber, and other materials (for example, thickener, lightening material, powder, etc.) are mixed and dry blended. What added water (about 100-150 mass parts is preferable with respect to 100 mass parts of cement), and mixed with the kneader can be used. In particular, in the present invention, it is particularly preferable to use the molding material 3 having an elastic limit stress of 0.001 to 0.2 MPa by adjusting the blending of each material. This is because the flowability of the molding material 3 can be obtained at the time of press molding, and the molding material 3 can be filled in every corner of the pattern forming irregularities 21 provided on the molding surface 4 of the upper mold 2. It is. When the elastic limit stress of the molding material 3 exceeds 0.2 MPa, an unfilled portion remains, and the concave / convex pattern 22 suitable for the concave / convex pattern forming pattern 21 can be accurately formed on the molding material 3. Disappear. Since it is difficult to make the elastic limit stress of the molding material 3 less than 0.001 MPa, 0.001 MPa is a substantial lower limit.

Here, as the cement, known cements such as Portland cement, blast furnace cement, and alumina cement can be used. In addition, it is preferable to use powdered silica having a large specific surface area as silica to be mixed with cement in terms of improving the toughness of the outer corner part. Specifically, the silica having a specific surface area of 3000 to 200000 cm ² / g. Is preferably used. Moreover, it is preferable that the silica is contained in a proportion of 20 to 120 parts by mass with respect to 100 parts by mass of the cement. If the amount is less than 20 parts by mass, the strength of the prepared corner decorative member is reduced, and conversely Moreover, when it exceeds 120 parts by mass, extrusion molding prior to press molding may be difficult. In addition, as reinforcing fibers, pulp materials such as L material, N material, ramie, and linter, vinylon, and polypropylene can be used. The content of the reinforcing fiber is preferably 5 to 25 parts by mass with respect to 100 parts by mass of the cement, and if it is less than 5 parts by mass, the strength of the protruding corner becomes insufficient. When it exceeds, there exists a possibility that shaping | molding may become difficult. Other contaminants include thickeners such as methylcellulose, ethylcellulose, and carboxymethylcellulose; lightweight materials such as resin-based hollow bodies, shirasu balloons, and perlite; and powders such as fly ash as necessary. Can be contained.

  First, the molding material 3 is extruded from a kneading extruder into a V-shaped cross-sectional shape with a flat surface. At this time, the sheet-shaped molding material 3 is placed on the tray 5 and set by extruding the molding material 3 onto the tray 5. The tray 5 is formed in an inverted V shape having the same cross section as the protruding corner shape of the tray receiving convex portion 49 of the lower mold 1. The molding material 3 may be extruded from a kneading extruder into a sheet shape. In this case, the sheet-shaped molding material 3 is bent on the tray 5 to form a V-shaped protruding corner.

  At this time, the lower mold 2 is in the supply / removal area A <b> 2 of the lower mold conveying device 13, and the molding material 3 is placed on the tray receiving projection 49 of the lower mold 2 together with the tray 5 and supplied. Next, the lower mold 1 is conveyed from the supply / removal area A2 to the molding area A1 on the lower mold conveying device 13. At this time, the cylinder rod 28 of the lower cylinder 14 is in a state of moving downward, and the receiving plate 29 is positioned below the upper surface of the lower mold transport device 13 so that the supply / take-out area A2 on the lower mold transport device 13 is located. Therefore, the lower mold 1 is not hindered from being transferred to the molding area A1. When the lower mold 1 is transported to the molding area A1 in this way, as shown in FIG. 2, the cylinder rod 36 of the upper cylinder 10 is in the upward movement state as shown by the arrow, and the upper mold together with the upper mold holder 9 The half halves 7a and 7b are pulled up to a predetermined height, and the cylinder rod 45 of each horizontal cylinder 8 is in a protruding state as shown by an arrow, and the upper half halves 7a and 7b are brought close to each other. Thus, the upper mold halves 7a and 7b are combined to form the upper mold 2. Here, a packing 56 is protruded and attached to one of the opposing surfaces of the upper mold halves 7a and 7b, and a packing receiving recess 57 is recessed in the other, and the upper mold halves 7a, 7b, When the 7b is brought into contact, the packing 56 is fitted into the packing receiving recess 57 so that the upper mold halves 7a and 7b can be brought into close contact with each other with high airtightness.

  When the molding start button is pressed and turned on, first, the lower cylinder 14 is actuated as shown in FIG. 2, and the receiving plate 29 is moved upward as indicated by an arrow, and protrudes above the upper surface of the lower mold conveying device 13. Accordingly, the lower mold 1 on the lower mold conveying device 13 is lifted and supported above the lower mold conveying device 13 by the receiving plate 29.

  Next, as shown in FIG. 3, the upper cylinder 10 operates as indicated by an arrow to move the upper mold holder 9 downward, and the upper mold 2 is pushed down together with the upper mold holder 9, so that the upper mold 1 The upper mold 2 is clamped. By clamping the mold in this manner, the molding material 3 on the lower mold 1 is pressed by the upper mold 2, and each surface of the protruding corner of the molding material 3 is molded by the upper mold halves 7 a and 7 b of the upper mold 2. The concave / convex pattern 22 can be formed on the molding material 3 by the concave / convex portions 21 for forming the patterns on the molding surfaces 4 (see FIG. 10C). At this time, it is preferable to control the operation of the upper cylinder 10 so that the lowering speed of the upper mold 2 is initially high and becomes slow from the middle so that the upper mold 2 contacts the molding material 3. In this press molding, the lower mold 1 is supported in a state of being lifted by the receiving plate 29. Therefore, the lower mold conveyance device 13 is damaged by the pressure applied during molding on the lower mold conveyance device 13. It can prevent that. When the upper mold 2 is clamped on the lower mold 1 in this way, the slide surfaces 12 of the upper mold halves 7a and 7b of the upper mold 2 and the slide surface 11 of the lower mold 1 are in contact with each other. Is in a state. As shown in FIG. 1A, the rod 19 of each pressing cylinder 60 is in a retracted position, and the tip of the pressing body 61 is positioned above the molding surface 4 of the upper mold halves 7a and 7b.

  Further, each upper mold half 7a, 7b of the upper mold 2 is provided with a vibration device 15, so that the vibration can be applied to the upper mold 2 by supplying air to the vibration device 15 and operating it. It is. This vibration is preferably about 3500 rpm. When the molding material 3 of the lower mold 1 is press-molded with the upper mold 2, the upper mold 2 is vibrated in this way, thereby providing the molding surfaces 4 of the upper mold halves 7 a and 7 b of the upper mold 2. The molding material 3 can be filled in every corner of the pattern-forming irregularities 21 and the moldability can be improved. The vibration can be continued from the start to the end of press molding by the upper die 2, but the vibration may be started when the upper die 2 is lowered.

  The upper mold halves 7a and 7b of the upper mold 2 are each formed of a porous resin, metal mold, or the like, and have fine holes opened in the molding surface 4 of the upper mold halves 7a and 7b. An air pipe is connected to the fine holes through the upper half halves 7a and 7b. The air pipe is formed by a vacuum pump or the like via a switching valve such as a three-way valve. An air suction means and an air blowing means formed by an air pump or the like are connected (both are not shown). When the molding material 3 of the lower mold 1 is press-molded with the upper mold 2, the vacuum pump of the air suction means is operated and the switching valve is switched to suck air from the fine holes. In this way, the molding material 3 is filled into the corners of the pattern forming irregularities 21 provided on the respective molding surfaces 4 of the upper mold halves 7a and 7b by sucking air from the fine holes opened in the molding surface 4. And formability can be improved. This air suction is preferably performed by setting the degree of vacuum to about -0.065 MPa, although it depends on the properties of the molding material 3. Further, as described above, since the packing 56 is fitted in the packing receiving recess 57 and the airtightness between the upper mold halves 7a and 7b is kept high, the effect of improving the formability by air suction can be obtained. It is something that can be done.

  Here, when each outer surface of the molding material 3 is press-molded using the upper mold 2 divided into two upper mold halves 7a and 7b, the molding method as shown in FIG. As shown in FIG. 10B from FIG. 10B, press forming is performed while the opposing ends of the upper mold halves 7a and 7b are abutted from each other. When the ends of the upper mold halves 7a and 7b are brought into contact with each other, the molding material 3 at the top of the protruding corner is pushed out, and the upper mold halves 7a and 7b come into contact with each other as shown in FIG. A burr 23 is generated between the matching ends. Therefore, in this case, a finishing process for removing the burr 23 is required, which causes a problem of productivity. On the other hand, in the present invention, as shown in FIGS. 2 and 3, the pair of upper mold halves 7a and 7b are press-molded in a state where the upper mold 2 is formed by abutting and uniting. The molding material 3 is not pushed out between the pair of upper mold halves 7a and 7b, and burrs are not generated in the molded product 6, so that the trouble of removing the burrs from the molded product 6 can be saved. .

  As described above, press molding is performed for a predetermined time, and when the predetermined time elapses, the operation of the vibration device 15 is stopped and the operation of the vacuum pump is stopped. Next, the mold is opened from the above-described mold clamping state. Prior to this mold opening, each pressing cylinder 60 is actuated to advance the rod 19, and the tip of each rod 19 is pressed as shown in FIG. The body 61 is protruded downward from the molding surface 4 of the upper mold halves 7a and 7b, and the pressing body 61 is brought into contact with the upper surface of the end portion projecting laterally from the portion where the molding material 3 of the tray 5 is set. .

  Then, in order to open the mold, the pair of horizontal cylinders 8 are operated to retract the cylinder rods 45 as indicated by arrows in FIG. Thus, when the cylinder rod 45 of each horizontal cylinder 8 is retracted, the pair of upper mold halves 7a and 7b move along the guide rails 42 in the direction of separation, but in this way each upper mold half 7a, When the 7b moves, the slide surface 12 of each upper mold half 7a, 7b slides with respect to the slide surface 11 of the lower mold 1. Here, since the slide surfaces 11 and 12 are each formed as an inclined surface that is inclined upward and outward, a force for lifting the upper half halves 7a and 7b acts obliquely upward along the slide surfaces 11 and 12. As shown in FIG. 4, the upper mold halves 7a and 7b can be moved obliquely upward. Thus, the upper mold halves 7a and 7b move obliquely upward while being separated, but the slide surface 11 is formed on an inclined surface perpendicular to the molding surface 4 of the upper mold halves 7a and 7b. The upper mold halves 7a and 7b move in a direction perpendicular to the molding surface 4 as indicated by arrows in FIG. Accordingly, each of the upper mold halves 7a and 7b moves in a direction perpendicular to each outer surface of the molded product 6 formed on the molding surface 4 and is released. The upper half halves 7a and 7b of the upper mold 2 can be released from the molded product 6 without the uneven pattern formed on the molded product 6 being destroyed by the irregularities for pattern forming.

  As described above, the upper mold halves 7a and 7b are moved obliquely upward by sliding the slide surfaces 11 and 12 by moving the upper mold halves 7a and 7b in the horizontal horizontal direction to be separated by the horizontal cylinders 8 as described above. At this time, while synchronizing with the operation of the horizontal cylinder 8, the upper cylinder 10 is operated to move the cylinder rod 36 upward as indicated by the arrow in FIG. The upper mold halves 7a and 7b are pulled up. By lifting the upper mold halves 7a and 7b with the upper cylinder 10, an unreasonable force acts between the slide surface 12 of the upper mold halves 7a and 7b and the slide surface 11 of the lower mold 1. Thus, the upper mold halves 7a and 7b can be smoothly moved obliquely upward. Thus, in the present invention, when the upper mold 2 is opened, the upper mold actuating means 17 for moving the upper mold halves 7a, 7b obliquely upward perpendicular to the molding surface 4 and releasing them from the molded product 6 is as follows. The horizontal cylinder 8, the upper mold holder 9, the upper cylinder 10, the upper mold halves 7 a and 7 b, and the slide surfaces 11 and 12 provided on the lower mold 1, respectively, are formed.

  Here, when the upper mold halves 7a and 7b are moved in the direction perpendicular to the molding surface 4 in order to open the mold as described above, the pressing cylinder is interlocked with the movement of the upper mold halves 7a and 7b. 60 is operated, each rod 19 is advanced by an amount synchronized with the amount of movement of the upper mold halves 7a and 7b, and the pressing body 61 is pressed against the upper surface of the tray 5 as shown in FIG. The state is maintained. Therefore, the upper surface of the tray 5 is pressed by the pressing body 61 of the rod 19 and the upper mold halves 7a and 7b are moved in the direction perpendicular to the molding surface 4 while pressing the tray 5 on the lower mold 1. Thus, the molding surfaces 4 of the upper mold halves 7a and 7b can be released from the molded product 6. Since the molded product 6 is made of the uncured molding material 3 and is in close contact with the upper surface of the tray 5, the molded product 6 does not lift from the upper surface of the tray 5. By releasing the molding surfaces 4 of the upper mold halves 7a and 7b from the molded product 6 while pressing, one upper mold half of the pair of upper mold halves 7a and 7b as shown in FIG. It is possible to prevent the molded product 6 from being lifted from the lower mold 1 while the molded product 6 is adhered to the body 7a. Accordingly, when the molded product 6 is lifted by, for example, one upper mold half 7a, the pattern forming unevenness 21 of the other upper mold half 7b is caught by the uneven pattern 22 of the molded product 6, and the formed uneven pattern 22 is formed. However, such a situation can be prevented and the uneven pattern 22 can be formed with high accuracy.

  Further, when the upper mold halves 7a and 7b of the upper mold 2 are released from the molded product 6 by opening the mold as described above, the air pump of the air blowing means is operated and the switching valve is switched so that the fine holes Air is blown out from. In this way, by blowing air from the fine holes opened in the molding surface 4, the molding material 3 does not adhere to the molding surfaces 4 of the upper mold halves 7 a and 7 b, and the upper mold half is removed from the molded product 6. 7a and 7b can be neatly released.

  After opening the mold as described above, the lower cylinder 14 operates as indicated by the arrow in FIG. 5, and the receiving plate 29 is lowered below the upper surface of the lower mold transport device 13. When the receiving plate 29 is lowered in this way, the lower mold 1 is placed on the lower mold conveying device 13. At this point, the molding completion lamp is turned on. Then, the lower mold 1 is conveyed from the molding area A1 to the supply / removal area A2 by the lower mold conveying device 13, the molded product 6 on the lower mold 1 is taken out together with the tray 51, and sent to the next process such as a curing process. It can be done. Thereafter, the air pump of the air blowing means is stopped and the switching valve is switched, and a release agent is applied to the molding surface 4 of each upper mold half 7a, 7b of the upper mold 2 to prepare for the next molding. Then, by repeating the procedure shown in FIGS. 2 to 5, the molded product 6 having an L-shaped cross section such as a protruding corner decorative member can be repeatedly formed.

  In the above embodiment, the pressure cylinder 60 is operated as the tray pressing means 18 by controlling the hydraulic pressure or the pneumatic pressure, and the pressure cylinder 60 is operated in conjunction with the movement of the upper mold halves 7a, 7b to operate the rod 19. The upper surface of the tray 5 is pressed by the rod 19 when the mold is opened, but in the embodiment shown in FIG. 8, the tray pressing means 18 includes the rod 19 that is elastically urged. It is formed by the pressing cylinder 62. In this configuration, the rod 19 is always urged in a direction to protrude from the pressing cylinder 62 and move forward by the elastic force of the spring provided in the pressing cylinder 62 or the elastic force of air. The pressing cylinder 62 is attached to both end portions of the upper mold halves 7a and 7b in the same manner as the pressing cylinder 60 described above.

  Then, when the upper mold 2 is clamped to the lower mold 1 and the molding material 3 is pressed by the upper mold 2 as shown in FIG. The pressing body 61 at the tip of the rod 19 protruding by force is in pressure contact with the upper surface of the tray 5. Since the elastic force of the pressing cylinder 62 is smaller than the clamping force of the upper die 2, the rod 19 recedes into the pressing cylinder 62 against the elastic force when the upper die 2 is clamped to the lower die 1. The pressing body 61 at the tip of the rod 19 can be brought into pressure contact with the upper surface of the tray 5 by the repulsive force at this time. Next, when the upper mold halves 7a and 7b are moved obliquely upward perpendicular to the molding surface 4 in order to open the upper mold 2 from the lower mold 1, the upper mold halves 7a and 7b are moved accordingly. Then, the rod 19 advances and protrudes from the pressing cylinder 62 by elastic force, and the state where the upper surface of the tray 5 is pressed by the pressing body 61 at the tip of the rod 19 as shown in FIG. Therefore, while pressing the upper surface of the tray 5 with the pressing body 61 of the rod 19 and pressing the tray 5 onto the lower mold 1, the upper mold halves 7a and 7b are moved to move the upper mold half 7a, Each molding surface 4 of 7b can be released from the molded product 6.

  FIG. 9 shows another example of the embodiment of the present invention. At the end of the lower mold 1 on the molding area A1 side in a state where the lower mold 1 is positioned in the supply / removal area A2, FIG. A release agent coating device 16 is provided as shown in 9 (b). As the release agent application device 16, for example, an application brush 55 formed by providing a large number of brush hairs 54 such as nylon around the brush shaft 53 as shown in FIG. 9C can be used. The application brush 55 is attached to both sides of the lower die 1 at an inclination angle same as that of the molding surface 4 of the upper die halves 7a and 7b, so that the brush shaft 53 is rotatable. In this case, after supplying the release agent to the application brush 55 in the supply / removal area A2, in order to introduce the lower mold 1 to the lower side of the upper mold 2, from the supply / removal area A2 to the molding area A1. When the lower mold conveying device 13 moves the lower mold 1, the lower mold 1 moves with the application brush 55 at the head. At this time, as shown in FIG. The mold release agent can be applied to the molding surfaces 4 of the upper mold halves 7a and 7b by rotating and contacting the molding surfaces 4 on the lower surfaces of the upper mold halves 7a and 7b. In addition to this application brush 55, if a nozzle for spraying a release agent is provided in the lower mold 1, the application brush 55 can be imprinted while applying the release agent to the forming surface 4. It is. In this way, when the lower mold 1 is introduced to the lower side of the upper mold 2, the release agent can be applied to the upper mold 2 at the same time. There is no need for trouble. Further, if the lower mold 1 is moved without supplying a release agent to the application brush 55, the rest of the molding material adhering to the molding surfaces 4 of the upper mold halves 7a and 7b can be removed. is there.

An example of embodiment of this invention is shown, (a) (b) (c) is a partial front view, respectively. It is a front view which shows the whole structure of an example of embodiment of this invention. It is a front view which shows the whole structure of an example of embodiment same as the above. It is a front view which shows the whole structure of an example of embodiment same as the above. It is a front view which shows the whole structure of an example of embodiment same as the above. A part of example of embodiment same as the above is shown, (a) is a top view, (b) is a partial side view. The whole structure of an example of embodiment same as the above is shown, (a) is a plan view, (b) is a side view. The other example of embodiment of this invention is shown, (a) (b) is a partial front view, respectively. It shows another example of the embodiment of the present invention, (a) is a partial side view, (b) is a partial front view, (c) is a partial schematic view. A conventional example is shown, and (a), (b), (c), and (d) are schematic cross-sectional views, respectively. It is a schematic sectional drawing which shows another prior art example. It is a schematic sectional drawing which shows another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower mold 2 Upper mold 3 Molding material 4 Molding surface 5 Tray 6 Molded product 7a, 7b Upper mold half body 8 Horizontal cylinder 9 Upper mold holder 10 Upper cylinder 11 Slide surface 12 Slide surface 13 Lower mold conveyance device 14 Lower cylinder 15 Vibrating device 16 Release agent coating device 17 Upper mold operating means 18 Tray pressing means 19 Rod

Claims (10)

  The molding material is set on a tray whose upper surface is formed in an inverted V-shaped cross section, and this tray is placed on the lower mold. The upper mold is clamped from above to the lower mold, and the molding material on the tray is placed on the tray. By pressing with an upper die whose bottom molding surface is formed in an inverted V-shaped cross section, a molded product with a protruding corner shape is formed, and after press molding, the upper die is opened from the lower die and the upper die from the molded product. In the press molding apparatus in which the molding surface is released, the upper die is formed by a pair of upper die halves obtained by dividing the upper die into left and right sides with the top of the molding surface having an inverted V-shaped cross section as a boundary. When the mold is opened, each upper mold half is moved obliquely upward perpendicular to the molding surface to release the mold from the molded product, and each upper mold half is opened from the molded product by opening the upper mold. And a tray pressing means for pressing the upper surface of the tray when releasing the molding surface. Molding apparatus.   The tray pressing means is formed with a rod that is driven to move in a direction parallel to the direction in which the upper mold half is released from the molded product, and the tray pressing means is provided in each upper mold half and each upper mold half 2. The press molding apparatus according to claim 1, wherein when the body is released from the molded product, the tray is pressed by the tip of the rod by moving and driving the rod toward the tray.   The tray pressing means is formed with a rod that is movable in a direction parallel to the direction in which the upper mold half is released from the molded product and is elastically biased in the direction of moving toward the tray, and the tray pressing means is 2. The press molding apparatus according to claim 1, wherein the press molding apparatus is provided on each upper mold half and presses the tip of the rod against the tray with its elastic force.   A pair of horizontal cylinders for reciprocating the upper mold actuating means in a lateral direction so as to contact and separate the upper mold halves of the upper mold, a pair of horizontal cylinders are fixedly attached, and the pair of upper mold halves The upper mold holder slidably mounted in the contact and separation direction, the upper cylinder for reciprocating the upper mold holder in the vertical direction, and each upper mold half of the upper mold with the upper mold clamped to the lower mold The movement direction of the upper mold half by the horizontal cylinder, which is provided in each upper mold half and the lower mold at a position where the body and the lower mold come into contact with each other, perpendicular to the molding surface of the upper mold half The upper die is lowered together with the upper die holder by the upper cylinder in a state in which the upper die is formed by bringing the upper die halves into contact with each other and forming an upper die. The upper mold is clamped to the lower mold, and a pair of horizontal cylinders By moving the upper mold half in the lateral direction, the upper mold half is moved obliquely upward perpendicular to the molding surface by sliding the slide surface of each upper mold half with respect to the slide surface of the lower mold. The press molding apparatus according to any one of claims 1 to 3, wherein the mold is opened.   Located below the upper mold, the lower mold conveying device that allows the lower mold to reciprocate between the position directly below the upper mold and the side position of the upper mold, and the lower mold conveying apparatus moves directly below the upper mold The press molding apparatus according to any one of claims 1 to 4, further comprising a lower cylinder that holds the lower mold raised from above the lower mold conveying device.   6. The press molding apparatus according to claim 1, further comprising a vibration device that vibrates the upper mold.   7. The upper die is provided with a large number of fine holes that open on the molding surface, and is provided with air suction means for sucking air from the fine holes when the mold is clamped. The press molding apparatus described in 1.   8. The press molding apparatus according to claim 7, further comprising air blowing means for discharging air from the fine holes when the mold is opened.   When the lower mold is reciprocated between the position immediately below and the side position of the upper mold by the lower mold conveying apparatus, a mold release agent coating apparatus that applies the mold release agent to the molding surface of the upper mold by the movement of the lower mold The press molding apparatus according to claim 5, wherein the press molding apparatus is provided in a lower mold. The molding material is placed on a tray whose upper surface is formed in an inverted V-shaped cross section, and this tray is placed on the lower mold, and then a pair of upper mold halves are brought into contact with each other to be combined. By moving the upper mold whose molding surface is formed in an inverted V-shaped cross section, clamping the upper mold on the lower mold and pressing the molding material on the tray with the molding surface of the upper mold, A molded product having a shape is formed, and then the upper die is opened from the lower die by moving the pair of upper die halves obliquely upward perpendicular to the molding surface while holding the upper surface of the tray. Press forming method.

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