JP6229091B1 - Mold equipment - Google Patents

Abstract

To provide a mold apparatus capable of saving space in a core block and its periphery. A first mold, a second mold that moves relative to the first mold in the opening / closing direction, and a mold closed state in which the first mold and the second mold are in contact in the opening / closing direction. A core inserted between the two molds, a core block that is fixed to the core, that slides in a sliding direction that intersects the opening / closing direction with respect to the second mold, and a cylinder that is fixed to the core block A cylinder in which the piston rod protrudes from the tube and expands and contracts in the sliding direction; and a connecting portion to which the piston rod is attached and fixed to the second mold, and at least one of the second mold or the core block is opposed to the second A groove portion is provided that is recessed in the sliding surface on which the type 2 or core block slides and extends in the sliding direction, and the connecting portion is disposed in the groove portion. [Selection] Figure 1

Description

  The present invention relates to a mold apparatus for casting having a core.

  In a mold apparatus that forms a cavity with a fixed mold, a movable mold, and a core, the movable mold is moved in the opening / closing direction with respect to the fixed mold, and the core block to which the core is fixed is fixed or movable. On the other hand, there is one that opens or closes a mold by sliding it with a cylinder in a sliding direction that intersects the opening and closing direction (Patent Document 1). In Patent Document 1, the core block is slid in the sliding direction at a position closer to the fixed mold than the sliding surface of the core block on which the movable mold slides, and a through hole is provided in the core block. The piston rod of the cylinder is inserted into the through hole, and the tip of the piston rod is attached to the movable mold.

Japanese Utility Model Publication No. 63-184657

  However, in the above prior art, since the piston rod inserted into the through-hole having substantially the same length as the sliding surface of the core block is attached to the movable type, it is shorter than the sliding surface of the core block. The cylinder piston rod is long, and there is a problem in space saving of the core block and its periphery.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a mold apparatus that can save space in the core block and its periphery.

  In order to achieve this object, a mold apparatus according to the present invention includes a first mold, a second mold that moves relative to the first mold in an opening / closing direction, the first mold, and the second mold. Crossed with the opening / closing direction with respect to the second mold, the core inserted between the first mold and the second mold with the mold closed in contact with the opening / closing direction, and the core fixed. A core block that slides in the sliding direction, a cylinder that protrudes from the cylinder tube fixed to the core block and extends and contracts in the sliding direction, and the piston rod is attached to the second mold. And at least one of the second mold or the core block is recessed in the sliding direction on which the opposing second mold or core block slides. A groove portion provided to extend, and the connecting portion includes the groove It is disposed within.

  According to the mold apparatus of claim 1, the connecting portion to which the piston rod of the cylinder is attached and fixed to the second die is a groove portion in which at least one sliding surface of the second die or the core block is recessed. Therefore, the piston rod of the shortened cylinder can be made shorter than the dimension of the sliding surface in the axial direction of the piston rod. As a result, the core block and its surroundings can be saved.

  According to the mold apparatus of the second aspect, the groove portion is provided in the core block, and the connecting portion is fitted in the groove portion to guide the sliding of the core block with respect to the second mold. Since the connecting portion also serves as a guide member for guiding the sliding of the core block with respect to the second mold, in addition to the effect of the first aspect, the number of parts can be reduced and the space of the core block and its periphery can be further saved. .

  According to the mold apparatus of the third aspect, the core block includes the first contact surface facing the extending direction in which the piston rod protrudes from the cylinder tube. The first mold includes a second contact surface facing a shortening direction opposite to the extending direction. At least one of the first contact surface or the second contact surface includes an inclined surface that is inclined in the shortening direction toward the second mold side. The inclined surface is arranged to come into contact with the first mold or the core block when the second mold is moved relative to the first mold in the opening / closing direction from the mold closed state. As a result, when the second mold is moved relative to the first mold in the opening / closing direction (when the mold is opened), the inclined surface is pushed by the first mold or the core block, and the first mold and the second mold are moved. The core block and the core move in the shortening direction (the direction away from the cavity). As a result, the core can be pulled away from the molded product formed by filling the cavity with the material.

  Further, since the connecting portion is disposed in the groove portion in which the sliding surface of the core block on which the second mold slides is recessed, the axis of the cylinder is easily separated from the center of the core block and the core. The further away from the center of the cylinder and the core block and the center of the cylinder, the more difficult it is to apply the force to separate the core from the molded product to the core block and the core, and the core is separated from the molded product. It may become difficult to cause the cylinder to malfunction. Since the core can be pulled away from the molded product by the inclined surface, in addition to the effect of the first or second aspect, the malfunction of the cylinder can be suppressed.

  According to the mold apparatus of claim 4, the connecting portion includes a fixed portion fixed to the second mold, a mounting portion that moves in a sliding direction with respect to the fixed portion and to which the piston rod is attached, and a fixed portion. And an elastic member that urges the attachment portion in the shortening direction by an elastic force. In the mold closed state, the core block is pressed in the extending direction by the first type stopper, so that the mounting portion is moved in the extending direction with respect to the second mold against the elastic force of the elastic member.

  By moving the core block in the shortening direction with respect to the second mold by the inclined surface when the mold is opened, the mounting part moves in the shortening direction with respect to the fixed part without expanding and contracting the cylinder. Since the attachment portion is urged in the shortening direction with respect to the fixed portion by the elastic force of the elastic member, the attachment portion moved in the shortening direction can be prevented from moving unexpectedly. That is, it is possible to prevent the core block that has moved in the shortening direction by the inclined surface when the mold is opened from being moved unexpectedly by the elastic force of the elastic member. As a result, it is possible to prevent the core block or first mold having an inclined surface from interfering with the core block or first mold contacting the inclined surface when the mold is opened when the mold is closed. Therefore, mold closing can be performed smoothly.

  Furthermore, since the elastic member which prevents these interference is provided in the connection part in a groove part, it can prevent that an elastic member protrudes outside the mold apparatus. As a result, in addition to the effect of the third aspect, the core block and its periphery can be further saved.

  According to the mold apparatus of the fifth aspect, the contact portion of the core block contacts the mounting portion or the cylinder tube side of the piston rod in the shortened state of the cylinder. Thereby, since the elastic force of an elastic member can be provided to a core block, without providing the force which expands / contracts to a cylinder, the load concerning a cylinder can be reduced. As a result, in addition to the effect of claim 4, the durability of the cylinder can be improved.

  According to the mold apparatus of the sixth aspect, the connecting portion includes the fitting portion to which the piston rod is detachably fitted in the opening / closing direction. The second mold and the core block are respectively provided with insertion holes that communicate with each other and can insert the same insertion member in the opening / closing direction when the cylinder is extended or shortened. With the insertion hole inserted into the other insertion hole of the second mold or the core block, with the insertion hole inserted into one of the second mold or the core block, with the insertion holes communicating with each other. By assembling the second mold and the core block, the piston rod of the cylinder fixed to the core block is fitted in the fitting portion of the connecting part fixed to the second mold from the opening / closing direction. As a result, in addition to the effect of any one of claims 1 to 5, the cylinder can be easily attached to the connecting portion.

It is sectional drawing of the metal mold apparatus of the mold closing state in 1st Embodiment of this invention. (A) is sectional drawing of the mold apparatus of an intermediate state, (b) is sectional drawing of the mold apparatus of a mold open state. (A) is a front side perspective view of a core, a core block, and a cylinder, (b) is a back side perspective view of a core, a core block, and a cylinder. It is sectional drawing of the metal mold apparatus in the IV-IV line of FIG. (A) is the fragmentary sectional view of the mold apparatus in the Va-Va line of FIG. 1, (b) is the fragmentary sectional view of the mold apparatus in the Vb-Vb line of FIG. 2 (a). (A) is sectional drawing of the mold apparatus of the mold closing state in the VIa-VIa line of FIG. 4, (b) is sectional drawing of the mold apparatus of an intermediate state. (A) is explanatory drawing when a core block is assembled | attached to a movable type | mold, (b) is explanatory drawing when the core block seen from the arrow VIIb direction of Fig.7 (a) is assembled | attached to a movable type | mold. It is a fragmentary sectional view of the metallic mold device in a 2nd embodiment. It is a perspective view of the movable mold | type and connection part of the metal mold | die apparatus in 3rd Embodiment. It is a top view of a movable type | mold and a connection part. It is sectional drawing of the movable type and connection part in the XI-XI line of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, the schematic configuration of the mold apparatus according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2A, and 2B. FIG. 1 is a cross-sectional view of the mold apparatus 1 in a mold closing state, FIG. 2A is a cross-sectional view of the mold apparatus 1 in an intermediate state, and FIG. 2B is a mold apparatus 1 in a mold open state. FIG. Note that the directions of arrows U, D, F, B, L, and R on the drawings indicate the upward direction, the downward direction, the forward direction, the backward direction, the left direction, and the right direction of the mold apparatus 1, respectively. However, these directions are set for ease of explanation, and are different from the upward and downward directions of the actual mold apparatus 1. Further, the arrow UD direction, the arrow FB direction, and the arrow LR direction are orthogonal to each other.

  As shown in FIG. 1, a mold apparatus 1 is an apparatus used for a casting method such as die casting. The mold apparatus 1 includes a fixed mold 10, a movable mold 20 that moves in an arrow LR direction (opening and closing direction) with respect to the fixed mold 10, and a core that is inserted between the fixed mold 10 and the movable mold 20. 30, a core block 31 to which the core 30 is fixed, a cylinder 40 to be fixed to the core block 31, and a connecting portion 50 to which the cylinder 40 is attached and fixed to the movable mold 20.

  The fixed mold 10 includes a main mold 11 that is fixed to a fixed platen (not shown), and a nest 12 that is fitted into the main mold 11. The movable mold 20 includes a main mold 21 that is fixed to a movable platen (not shown) and a nest 22 that is fitted into the main mold 21. Of course, the main mold 11 and the insert 12 can be integrally molded, or the main mold 21 and the insert 22 can be integrally formed.

  The inserts 12 and 22 are members that set the shape of a molded product manufactured by the mold apparatus 1. By changing the shape of the inserts 12 and 22 fitted into the main molds 11 and 21, the shape of the molded product can be changed. By moving the movable platen in the direction of the arrow LR with respect to the fixed platen by a driving device (not shown), the movable die 20 moves in the direction of the arrow LR relative to the fixed die 10.

  The core 30 is a member for forming an undercut shape such as a groove, hole, protrusion, or inclined surface in a molded product. The core 30 is inserted between the inserts 12 and 22 in a mold closing state to be described later. The shape of the core 30 is set according to the undercut shape formed in the molded product.

  The core block 31 is a part that slides in the arrow UD direction with respect to the movable mold 20. The core block 31 is sandwiched between the main mold 11 and the main mold 21 when the mold is closed. The core 30 is fixed to the surface (fourth surface 31d) of the core block 31 on the side of the inserts 12 and 22 by fitting, bolts, or the like. The core 30 and the core block 31 can be integrally formed.

  The cylinder 40 is a hydraulic cylinder that uses hydraulic pressure as a drive source. The cylinder 40 is not limited to a hydraulic cylinder, and a pneumatic cylinder or an electric cylinder can be used for the cylinder 40. The cylinder 40 includes a cylinder tube 41 that is fixed to the core block 31 with a screw 43, and a piston rod 42 that protrudes from the cylinder tube 41 in the arrow D direction (extension direction) and is attached to the connecting portion 50. The piston rod 42 includes a small-diameter portion 44 that is provided on the distal end side and has a smaller diameter than both axial sides, and a large-diameter portion 45 that is a portion closer to the distal end than the small-diameter portion 44 (see FIG. 5 for both).

  The cylinder 40 pushes the piston rod 42 in the arrow D direction (extension direction) from the cylinder tube 41 or pulls the piston rod 42 into the cylinder tube 41 in the arrow U direction (shortening direction) by the driving force from the drive source. It expands and contracts. By shortening the cylinder 40, the core block 31 slides in the arrow D direction with respect to the movable mold 20, and by extending the cylinder 40, the core block 31 moves in the arrow U direction with respect to the movable mold 20. Slide.

  While the cylinder 40 is shortened to bring the core block 31 and the movable mold 20 into contact with each other in the direction of the arrow UD, the mold apparatus 1 is brought into contact with the fixed mold 10 and the movable mold 20 in the direction of the arrow LR. The mold is closed. By setting the mold apparatus 1 in a closed state, a cavity 2 that is a space surrounded by the inserts 12 and 22 of the fixed mold 10 and the movable mold 20 and the core 30 is formed. A molded product is molded by filling the cavity 2 with a material from an inlet (not shown) and curing the material. In addition, let the state of the cylinder 40 in the mold closing state of the mold apparatus 1 be a shortened state.

  The main mold 11 of the fixed mold 10 is provided with a stopper 13 that restricts the movement of the core block 31 in the arrow U direction when the mold apparatus 1 is closed. The stopper 13 includes a stopper surface 13a facing the arrow D direction. When the stopper surface 13a comes into contact with the stopper surface 32 of the core block 31, the core block 31 and the core 30 move in the direction of the arrow U due to pressure or the like at the time of molding. It can suppress giving load.

  The stopper surfaces 13a and 32 are inclined in the arrow U direction as they go in the arrow R direction (movable mold 20 side). Thereby, when the movable mold 20 and the core block 31 are moved in the arrow L direction (mold closing direction) with respect to the fixed mold 10 and the mold is closed, the stopper 13 can be hardly interfered with the core block 31. The core block 31 can be pressed against the cavity 2 by the stopper 13.

  As shown in FIG. 2A, by moving the movable mold 20 and the core block 31 in the arrow R direction (mold opening direction) with respect to the fixed mold 10 from the mold closed state of the mold apparatus 1, The mold apparatus 1 is in an intermediate state. Further, as shown in FIG. 2 (b), the mold apparatus 1 is opened and the mold is opened by extending the cylinder 40 from the intermediate state of the mold apparatus 1 to the maximum state. .

  Next, the core block 31 and the cylinder 40 will be described in more detail with reference to FIGS. 3 (a) and 3 (b). 3A is a front perspective view of the core 30, the core block 31, and the cylinder 40, and FIG. 3B is a rear perspective view of the core 30, the core block 31, and the cylinder 40.

  3A and 3B, the core block 31 includes a first surface 31a, a second surface 31b, a pair of third surfaces 31c and 31c, a fourth surface 31d, It is a substantially rectangular parallelepiped member having a total of six surfaces with the fifth surface 31e. The first surface 31a is a surface facing in the arrow R direction. The second surface 31b is a surface facing the arrow L direction. The pair of third surfaces 31c and 31c are surfaces facing in the direction of arrow FB. The fourth surface 31d is a surface facing the arrow D direction. The fifth surface 31e is a surface facing the arrow U direction.

  The first surface 31a (sliding surface) is a surface on which the movable mold 20 (see FIG. 1) slides. The fixed surface 10 contacts the second surface 31b when the mold is closed. The core 30 is fixed to the fourth surface 31d. Of the portions of the corners of the second surface 31b and the fifth surface 31e that are notched in the center in the arrow BF direction, the surface facing the arrow U direction is the stopper surface 32.

  The core block 31 includes a groove 33 having a concave center in the arrow FB direction of the first surface 31a, a cylinder mounting portion 34 to which the cylinder tube 41 is mounted, and a piston rod 42 that passes through the cylinder mounting portion 34. The arranged contact portion 35, the step portion 36 formed on the third surface 31c, the notch portion 37 in which a part of the core block 31 is notched, and a plurality of pipes 38 attached to the fifth surface 31e. Prepare.

  The groove portion 33 is a groove provided extending in the arrow UD direction, and opens in the arrow D direction. The cylinder attachment portion 34 is a plate-like portion that closes the end portion of the groove portion 33 in the arrow U direction. The cylinder mounting portion 34 slightly protrudes from the first surface 31 a in the arrow R direction and is integrally formed with the core block 31. A cylinder tube 41 is fixed to the cylinder mounting portion 34 with screws 43. The piston rod 42 is inserted into a through hole 34 a that passes through the center of the cylinder mounting portion 34. Thereby, the piston rod 42 is disposed inside the groove portion 33.

  It is possible to fix the cylinder mounting portion 34 to the core block 31 by bolts or fitting. In addition, the shape and position of the cylinder attachment portion 34 are appropriately changed depending on the position and attachment method of attaching the cylinder tube 41 to the core block 31.

  A cylinder tube 41 is fixed to the cylinder mounting portion 34 with screws 43. The piston rod 42 is inserted into a through hole 34 a that passes through the center of the cylinder mounting portion 34. Thereby, the piston rod 42 is disposed inside the groove portion 33.

  The contact portion 35 is a U-shaped portion that extends a part of the inner peripheral surface of the through hole 34a in the direction of arrow D. The contact portion 35 is arranged continuously with the cylinder attachment portion 34 and is integrally formed with the cylinder attachment portion 34. It is possible to form the contact portion 35 and the cylinder attachment portion 34 and fix them to each other by bolts or fitting. Further, not only when the contact portion 35 is fixed to the cylinder mounting portion 34, the contact portion 35 can be disposed in the groove portion 33 apart from the cylinder mounting portion 34.

  The step portion 36 is a step formed by denting the second surface 31b side of the third surface 31c with respect to the first surface 31a side of the third surface 31c, and is formed over the entire length in the arrow UD direction. The cutout portion 37 is a portion cut out so that two corners of the second surface 31b, the pair of third surfaces 31c, 31c, and the fourth surface 31d are recessed in a direction perpendicular to the surfaces. The notch 37 includes a first contact surface 37a (inclined surface) facing in the direction of arrow D (the core 30 side). The first contact surface 37a is inclined in the arrow U direction as it goes in the arrow R direction (the first surface 31a side).

  An insertion hole 37b is provided through the core block 31 where the dimension in the arrow LR direction is reduced by the notch 37 in the arrow LR direction. The insertion hole 37 b is a guide hole that serves as a mark for attaching the core block 31 to the movable mold 20.

  The pipe 38 introduces a coolant such as cooling water into a cooling passage (not shown) formed inside the core 30 and the core block 31 and discharges the coolant from the cooling passage. Since a hose (not shown) is attached to the pipe 38 in order to introduce the refrigerant from the outside of the mold apparatus 1 and to discharge the refrigerant to the outside, the pipe 38 is on the opposite side to the core 30 and has a mold. It is attached to the fifth surface 31e exposed to the outside of the device 1. The cooling passage and the pipe 38 are not essential and can be omitted.

  Next, the relationship between the movable mold 20 and the core block 31 will be described with reference to FIG. 4 is a cross-sectional view of the mold apparatus 1 taken along line IV-IV in FIG. As shown in FIG. 4, the movable mold 20 is recessed in the direction of the arrow R to form a fitting recess 23. A core block 31 is disposed in the fitting recess 23. The movable mold 20 includes two plate members 24 disposed between the fitting recess 23 and the first surface 31 a of the core block 31, and between the fitting recess 23 and the third surface 31 c of the core block 31. And a pair of fixing members 25 arranged respectively.

  The plate member 24 is a rectangular plate-like member provided extending in the arrow UD direction. The plate member 24 is fixed to the fitting recess 23. The surface of the plate member 24 on the core block 31 side is a sliding surface 24a. The sliding surface 24a and the first surface 31a of the core block 31 slide on each other.

  The plate member 24 is made of a material having higher wear resistance than the main mold 21. Thereby, since the abrasion resistance of the movable mold | type 20 with respect to the core block 31 can be improved, durability of the movable mold | type 20 can be improved. Further, since the contact area between the first surface 31 a and the movable mold 20 can be reduced by the plate member 24, the core block 31 can be easily slid with respect to the movable mold 20.

  The fixing member 25 is a thick plate-like member that is detachably fixed to the fitting recess 23. In the fixing member 25, the surface on the core block 31 side is an opposing surface 25a. The facing surface 25a and the third surface 31c of the core block 31 face each other, and a slight gap is provided between the facing surface 25a and the third surface 31c. This gap can prevent rubbing between the facing surface 25 a and the third surface 31 c, and can easily slide the core block 31 with respect to the movable mold 20. A stepped portion 26 that fits into the stepped portion 36 of the third surface 31 c is provided on the facing surface 25 a of the fixing member 25. The step portion 26 and the step portion 36 of the core block 31 slide with each other.

  A rectangular parallelepiped connecting portion 50 is fixed to the fitting recess 23 of the movable mold 20. By fitting the connecting portion 50 in the groove portion 33 of the core block 31, the movement of the core block 31 in the direction of the arrow FB relative to the movable mold 20 is restricted. Further, by fixing the pair of fixing members 25 to the fitting recess 23 and fitting the step portion 26 to the step portion 36 of the third surface 31 c, the core for the movable mold 20 between the step portion 26 and the plate member 24. The movement of the block 31 in the direction of the arrow LR is restricted.

  As a result, the core block 31 is attached to the movable mold 20 so as to be slidable in the arrow UD direction. Further, the sliding of the core block 31 with respect to the movable mold 20 in the direction of the arrow UD is guided by the connecting portion 50 fitted in the groove portion 33. That is, the connecting portion 50 is also a guide member that guides the sliding between the movable mold 20 and the core block 31.

  Next, the connection part 50 is demonstrated with reference to Fig.5 (a) and FIG.5 (b). 5A is a partial cross-sectional view of the mold apparatus 1 taken along the line Va-Va in FIG. 1, and FIG. 5B is a partial cross-sectional view of the mold apparatus 1 taken along the line Vb-Vb in FIG. It is. FIGS. 5A and 5B schematically show the elastic member 56. 5A and 5B show the cylinder 40 viewed from the direction of the arrow R. 5A and 5B exaggeratedly show the width of the contact portion 35 (dimension in the direction of the arrow FB), and the dimensions and shapes of the respective portions are slightly increased as the dimensions are exaggerated. This is schematically shown in FIG.

  As shown in FIG. 5A, the connecting portion 50 includes a box-shaped fixing portion 51 fixed to the movable mold 20 (see FIG. 1), and an attachment to which the piston rod 42 is attached in the fixing portion 51. Part 52, shaft-like part 53 provided extending from attachment part 52 into fixing part 51, annular flanges 54, 55 through which shaft-like part 53 passes, and elastic member arranged between flanges 54, 55 56.

  The fixing portion 51 is a box-shaped member that constitutes the outer wall of the rectangular parallelepiped connecting portion 50 and that is open on one surface. The fixing part 51 is configured by standing up a pair of rectangular plate-like side wall parts 51b, a front wall part 51c and a rear wall part 51d on four sides of a rectangular plate-like bottom face part 51a. The fixed part 51 is fixed to the movable mold 20 using a screw 50a in a state where the bottom surface part 51a is in contact with the movable mold 20. Note that a cover (not shown) is attached to the one surface of the fixing portion 51 where the opening is closed.

  The pair of side wall portions 51b are walls on the arrow B and F direction sides, respectively. The front wall 51c is a wall on the arrow D direction side. The front wall portion 51c is provided with a through hole 51e that penetrates in the wall thickness direction (arrow UD direction) and opens in the arrow L direction. A shaft portion 53 is disposed inside the through hole 51e. Thereby, interference with the front wall part 51c and the shaft-shaped part 53 can be prevented.

  The rear wall 51d is a wall on the arrow U direction side. The rear wall 51d is provided with a through hole 51f that penetrates in the wall thickness direction (arrow UD direction) and opens in the arrow L direction. A piston rod 42 is disposed inside the through hole 51f. Thereby, interference with the rear wall part 51d and the piston rod 42 can be prevented.

  The attachment portion 52 is a rectangular parallelepiped member that slides along the side wall portion 51b. The attachment portion 52 includes a fitting portion 52a to which the piston rod 42 is detachably attached. The fitting portion 52a is a recess that opens in the arrow U direction (the rear wall portion 51d side) and the arrow L direction of the attachment portion 52. The fitting part 52a includes a pair of protrusions 52b protruding from the inner surface in the arrow BF direction. The pair of protrusions 52b are provided extending in the direction of the arrow LR. The dimension in the arrow B-F direction between the pair of protrusions 52b is set to be approximately the same as the outer diameter of the small diameter portion 44 of the piston rod 42.

  As a result, the small diameter portion 44 of the piston rod 42 is slid in the direction of the arrow LR and fitted into the pair of protrusions 52b, or the small diameter portion 44 is slid in the direction of the arrow LR and removed from the pair of protrusions 52b. it can. That is, the small diameter portion 44 and the large diameter portion 45 of the piston rod 42 can be detachably attached to the fitting portion 52a in the arrow LR direction. Further, when the small diameter portion 44 and the large diameter portion 45 are attached to the fitting portion 52a, the small diameter portion 44 fits into the projection portion 52b and the large diameter portion 45 is caught by the projection portion 52b. It can be prevented from coming off in the direction of arrow U.

  The shaft-like portion 53 is a member having a screw (not shown) formed on the outer peripheral surface. The shaft-like portion 53 is fixed to the attachment portion 52 by fastening to the screw hole 52 c provided on the front wall portion 51 c side of the attachment portion 52. The elastic member 56 is a coil spring that is compressed in the axial direction (UD direction) of the shaft-like portion 53 between the flanges 54 and 55.

  As a method of assembling the connecting portion 50, first, the shaft portion 53 is fastened to the mounting portion 52, and the nut 50 b is fitted to the shaft portion 53. Next, the shaft portion 53 is inserted in the order of the flange 54, the elastic member 56, and the flange 55, and the nuts 50 c and 50 d are fitted to the shaft portion 53. And the connection part 50 is obtained by arrange | positioning the attachment part 52, the shaft-shaped part 53, etc. in the inside of the fixing | fixed part 51. FIG.

  By fitting the nut 50b to the shaft-like portion 53 fastened to the attachment portion 52, it is difficult to loosen the fastening between the attachment portion 52 and the shaft-like portion 53. Moreover, the nuts 50c and 50d can be made difficult to loosen by attaching the two nuts 50c and 50d.

  In the connecting portion 50 configured as described above, the flange 54 comes into contact with the nut 50b and the flange 55 comes into contact with the front wall portion 51c, so that the elastic force of the elastic member 56 compressed between the flange 54 and the flange 55 is obtained. Accordingly, the attachment portion 52 is biased in a direction away from the front wall portion 51c (in the direction of arrow U). That is, the core block 31 and the cylinder 40 are biased in the direction of the arrow U with respect to the movable mold 20.

  However, when the mold apparatus 1 is in the closed state, the movement of the core block 31 in the arrow U direction with respect to the fixed mold 10 and the movable mold 20 is restricted by the stopper 13 (see FIG. 1). Therefore, the contact portion 35 and the attachment portion 52 are pressed against the front wall portion 51 c against the elastic force of the elastic member 56. Thereby, the rear wall portion 51d and the attachment portion 52 are separated from each other, and the elastic member 56 is compressed.

  As shown in FIG. 5B, since the movement of the core block 31 by the stopper 13 is not restricted in the intermediate state (die opening state) of the mold apparatus 1 (see FIG. 2A), the elastic member The attachment portion 52 and the core block 31 are pushed in the direction of the arrow U by the elastic force 56, and the attachment portion 52 contacts the rear wall portion 51d. In the intermediate state (die opening state) of the mold apparatus 1, the state in which the core block 31 and the cylinder 40 are slightly slid in the arrow U direction with respect to the movable die 20 is maintained by the elastic force of the elastic member 56. The

  The contact portion 35 of the core block 31 to which the cylinder tube 41 is fixed is disposed in the through hole 51f. Since the contact portion 35 contacts the cylinder tube 41 side of the mounting portion 52, a pressing force in the direction of arrow D by the stopper 13 can be applied to the elastic member 56 without passing through the cylinder 40, and the elastic force by the elastic member 56. Can be given to the core block 31. Thereby, since the load concerning the cylinder 40 can be reduced, durability of the cylinder 40 can be improved.

  The connecting portion 50 can adjust the elastic force of the elastic member 56 by adjusting the position of the nut 50 b with respect to the shaft-like portion 53. By adjusting the positions of the nuts 50c and 50d with respect to the shaft-like portion 53, the length when the elastic member 56 is most extended can be adjusted. Here, the positions of the nuts 50c and 50d with respect to the shaft-like portion 53 are adjusted so that the flange 55 and the nut 50c come into contact with each other in the intermediate state (die opening state) in which the attachment portion 52 is in contact with the rear wall portion 51d. Thereby, the distance from the front wall part 51c to the rear wall part 51d and the distance from the front wall part 51c side of the flange 55 biased by the elastic member 56 to the rear wall part 51d side of the attachment part 52 are made the same. it can. As a result, it is possible to easily put the mounting portion 52, the shaft-shaped portion 53, and the like inside the fixed portion 51.

  Next, the relationship between the fixed mold 10 and the core block 31 will be described with reference to FIGS. 6 (a) and 6 (b). FIG. 6A is a cross-sectional view of the mold apparatus 1 in the mold closing state taken along the line VIa-VIa in FIG. 4, and FIG. 6B is a cross-sectional view of the mold apparatus 1 in the intermediate state.

  As shown in FIG. 6A, the fixed mold 10 includes an inclined block 14 that fits into the notch 37 of the core block 31. The inclined block 14 includes a second contact surface 15 (an inclined surface) that comes into surface contact with the first contact surface 37 a of the notch 37. The 2nd contact surface 15 is a surface which inclines in the arrow U direction as it goes to the arrow R direction (movable type | mold 20 side) similarly to the 1st contact surface 37a.

  In the mold closing state of the mold apparatus 1, the second contact surface 15 of the fixed mold 10 and the first contact surface 37 a of the core block 31 are in surface contact. As shown in FIG. 6B, when the movable mold 20 and the core block 31 are moved from the fixed mold 10 in the direction of the arrow R to bring the mold apparatus 1 into an intermediate state, the first contact surface 37a and the second contact The core block 31 moves in the direction of arrow U along the surface 15. As a result, the core 30 can be separated from the molded product that is formed by filling the cavity 2 with the material.

  Here, when the first contact surface 37a and the second contact surface 15 are not used, the cylinder 40 is extended to separate the core 30 from the molded product. In this case, depending on the shape of the core 30 or the like, the core 30 may be strongly assembled to the molded product and may be difficult to separate, and it is necessary to use the cylinder 40 having a large output. Further, a large load may be applied to the cylinder 40, causing the cylinder 40 to malfunction.

  In particular, the cylinder 40 is attached to the connecting portion 50 (see FIG. 1) disposed in the groove portion 33 in which the first surface 31a of the core block 31 is recessed, so that the center of the core 30 and the core block 31 is provided. The axial center of the cylinder 40 is greatly separated from the (center of the arrow LR direction and the arrow FB direction) in the arrow LR direction. When the core 30 is pulled away from the molded product by the cylinder 40, the force that separates the core 30 and the core block 31 from the molded product increases as the center of the core 30 and the core block 31 is separated from the axis of the cylinder 40. It becomes difficult to be applied uniformly. As a result, it becomes difficult to separate the core 30 from the molded product, and the malfunction of the cylinder 40 may easily occur. On the other hand, in this embodiment, since the core 30 can be separated from the molded product by the first contact surface 37a and the second contact surface 15, the cylinder 40 with a small output can be used, and the cylinder 40 malfunctions. Can be suppressed.

  Here, the movable mold 20 is moved in the arrow L direction from the intermediate state in which the core block 31 is moved in the arrow U direction with respect to the fixed mold 10 and the movable mold 20 by the first contact surface 37a and the second contact surface 15. When the core block 31 is moved in the direction of the arrow D with respect to the movable mold 20 when the mold is closed, the fixed mold 10 and the core block 31 may interfere with each other.

  However, in the present embodiment, as described above with reference to FIG. 5B, the core block 31 and the cylinder 40 are urged in the arrow U direction with respect to the movable mold 20 by the elastic force of the elastic member 56. Is done. Therefore, the elastic force of the elastic member 56 can prevent the core block 31 moved in the arrow U direction by the first contact surface 37a and the second contact surface 15 from moving unexpectedly in the arrow D direction. As a result, since the fixed mold 10 and the core block 31 can be prevented from interfering when the mold is closed, the mold can be closed smoothly. Furthermore, since the elastic member 56 for preventing this interference is built in the connecting portion 50, it is possible to prevent the elastic member 56 from protruding to the outside of the mold apparatus 1. As a result, space can be saved for the core block 31 and its surroundings (cylinder 40, connecting portion 50, etc.). Further, since the elastic member 56 is built in the connecting portion 50, it is possible to prevent the elastic member 56 from dropping from the mold apparatus 1 when the shaft-like portion 53 is damaged.

  Next, an operation process for assembling the core block 31 to the movable mold 20 will be described with reference to FIGS. 7 (a) and 7 (b). 7A is an explanatory diagram when the core block 31 is assembled to the movable mold 20, and FIG. 7B is a diagram illustrating the core block 31 viewed from the direction of arrow VIIb in FIG. It is explanatory drawing when assembling. 7A and 7B are illustrated with the pipe 38 omitted. FIG. 7B is illustrated with the core 30, the plate member 24, and the screw 50a omitted.

  As shown in FIGS. 7A and 7B, first, the two insertion holes 27 provided in the fitting recess 23 of the movable mold 20 are removed with the fixing member 25 (see FIG. 4) removed. Two rod-shaped insertion members 28 are inserted respectively. Since the distance between the two insertion members 28 (two insertion holes 27) protruding from the fitting recess 23 in the arrow L direction and the distance between the two insertion holes 37b provided in the core block 31 are the same. Then, the two insertion members 28 are inserted into the two insertion holes 37 b of the core block 31. Thereby, the core block 31 is disposed at an appropriate position of the movable mold 20. At this time, the insertion hole 27 and the insertion hole 37b communicate with each other.

  When the same insertion member 28 is inserted into the insertion holes 27, 37 b, the positions of the distal ends (small diameter portion 44 and large diameter portion 45) of the piston rod 42 of the expanded cylinder 40 fit into the fitting portion 52 a of the mounting portion 52. Exists. By moving the core block 31 along the insertion member 28 provided extending in the direction of the arrow LR, the small-diameter portion 44 fits into the protruding portion 52b and the cylinder 40 is attached to the connecting portion 50.

  Next, the fixed member 25 is attached to the movable mold 20, and the core block 31 is assembled to the movable mold 20. Finally, the core block 31 can be moved in the direction of the arrow UD relative to the movable mold 20 by removing the insertion member 28 detachable in the direction of the arrow LR from the insertion holes 27 and 37b.

  In this way, the piston rod 42 of the extended cylinder 40 is set to fit into the fitting portion 52a in a state where the insertion hole 27 of the movable mold 20 and the insertion hole 37b of the core block 31 are communicated. Thus, the cylinder 40 can be easily attached to the connecting portion 50. In particular, since the cylinder 40 is attached to the connecting portion 50 disposed in the groove portion 33 in which the first surface 31 a of the core block 31 is recessed, the piston rod 42 and the connecting portion 50 are hidden behind the core block 31 and visually observed. Although it is difficult, the cylinder 40 can be easily attached to the connecting portion 50 without visual inspection. Since the core block 31 and the cylinder 40 can be easily attached to the movable mold 20, the replacement of the core block 31 and the core 30, the replacement of the cylinder 40, and maintenance can be simplified.

  According to the mold apparatus 1 as described above, the connecting portion 50 to which the piston rod 42 of the cylinder 40 is attached and fixed to the movable die 20 is a groove portion in which the first surface 31a on which the movable die 20 slides is recessed. 33. Here, in the conventional mold apparatus (for example, Patent Document 1) in which the piston rod passes through the core block and is attached to the movable mold, the cylinder is shorter than the sliding surface of the core block on which the movable mold slides. The piston rod becomes longer, and there is a problem in space saving of the core block and its periphery.

  On the other hand, in the present embodiment, since the connecting portion 50 to which the piston rod 42 is attached is disposed in the groove portion 33, regardless of the dimension of the first surface 31a (sliding surface) in the arrow UD direction, The protrusion amount of the piston rod 42 of the shortened cylinder 40 from the cylinder tube 41 can be determined. Therefore, the piston rod 42 of the shortened cylinder 40 can be made shorter than the dimension of the first surface 31a in the direction of the arrow UD, so that the core block 31 and its periphery can be reduced in space and weight.

  Further, the connecting portion 50 disposed in the groove portion 33 is a guide member that fits into the groove portion 33 and guides the sliding of the core block 31 with respect to the movable mold 20. Since the connecting portion 50 also serves as a guide member, the number of parts can be reduced, and the core block 31 and its periphery can be further reduced in space and weight.

  Since the connecting portion 50 is disposed in the groove portion 33 in which the first surface 31 a on which the movable mold 20 slides is recessed, the cylinder 40 can be moved away from the center of the core block 31. Thereby, the space for arrange | positioning the pipe 38 in which the hose for cooling is attached to the 5th surface 31e of the core block 31 exposed outside the metal mold | die apparatus 1 is securable. As a result, handling of the cooling hose can be facilitated. Further, in order to secure a space for arranging the pipe 38, it is not necessary to cut out a part of the fixed mold 10 or the movable mold 20 or enlarge the core block 31, so that the fixed mold 10 or the movable mold 20 is not required. It is possible to prevent the strength of the mold apparatus 1 from being lowered and to prevent the mold apparatus 1 from being enlarged due to the enlargement of the core block 31.

  A large force is generated using the first contact surface 37a and the second contact surface 15 to slightly separate the core block 31 from the molded product, and when removing the molded product from the movable mold 20, the molded product and the core block 31 The core block 31 is moved largely by the cylinder 40 so as not to interfere with each other. Thereby, the cylinder 40 can be reduced in size while the first contact surface 37a and the second contact surface 15 are reduced in size. Therefore, the cost of the cylinder 40 can be reduced, and the core block 31 and its periphery can be saved and reduced in weight.

  Next, a second embodiment will be described with reference to FIG. In the first embodiment, the case where the piston rod 42 cannot be divided in the axial direction has been described. On the other hand, 2nd Embodiment demonstrates the case where the piston rod 61 can be divided | segmented to an axial direction. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 8 is a partial cross-sectional view of a mold apparatus according to the second embodiment. FIG. 8 illustrates the cylinder tube 41, the base end portion 62, and the tip end portion 63 viewed from the direction of the arrow R.

  As shown in FIG. 8, the cylinder 60 slides the core block 31 with respect to the movable mold 20. The cylinder 60 includes a cylinder tube 41 and a piston rod 61 that protrudes from the cylinder tube 41 and is attached to the connecting portion 50. The piston rod 61 is an axial member that can be divided in the axial direction. The piston rod 61 includes a shaft-like base end portion 62 that protrudes from the cylinder tube 41, a shaft-like tip end portion 63 that is disposed so as to extend the base end portion 62, and ends of the base end portion 62 and the tip end portion 63. And a connection part 64 (coupling) for connecting the parts.

  The base end portion 62 has the same configuration as the piston rod 42 in the first embodiment. The distal end portion 63 is provided with a small diameter portion 65 having the same diameter as the small diameter portion 44 of the base end portion 62, and large diameter portions 66 and 67 having the same diameter as the large diameter portion 45 of the base end portion 62. With. The large diameter portion 66 fits into the fitting portion 52 a of the attachment portion 52.

  The connecting portion 64 is fitted into the large diameter portion 45 and the large diameter portion 67 in a state where the large diameter portion 45 of the proximal end portion 62 and the large diameter portion 67 of the distal end portion 63 are abutted in the axial direction. And the tip 63 are connected. The connection portion 64 can easily connect the base end portion 62 and the distal end portion 63 by fastening bolts (not shown) or releasing the fastening, and can easily release the connection.

  The connecting part 64 is disposed outside the connecting part 50. Thereby, for example, the movable die 20 and the core block 31 are assembled by aligning the end surface on the arrow U direction side of the rear wall portion 51 d of the connecting portion 50 with the end surface on the arrow U direction side of the movable die 20. In this state, the connection portion 64 can be easily accessed from the arrow R direction side (movable mold 20 side).

  In the case of the first embodiment, in order to remove the cylinder 40 from the core block 31 for replacement or maintenance, first, the core block 31 is removed from the movable die 20 in the direction of arrow L, and the piston rod 42 is fitted. Remove from part 52a. Next, the cylinder 40 is detached from the core block 31 by removing the screw 43 for attaching the cylinder tube 41 to the cylinder attachment portion 34.

  On the other hand, in the second embodiment, the connection by the connecting portion 64 is released and the screw 43 is removed, so that the core block 31 is not removed from the movable mold 20 and the base of the cylinder tube 41 and the piston rod 61 is removed. The end 62 can be easily removed from the movable mold 20 and the core block 31. Conversely, the cylinder tube 41 and the base end portion 62 can be easily attached to the movable mold 20 and the core block 31. As a result, replacement and maintenance of the cylinder 60 can be simplified.

  The connecting portion 64 protrudes radially outward with respect to the proximal end portion 62 and the distal end portion 63. The cylinder tube 41 side of the connecting portion 64 of the piston rod 61 contacts the contact portion 35 of the core block 31. Accordingly, the pressing force in the direction of arrow D by the stopper 13 can be applied to the elastic member 56 without applying a force for expanding and contracting the cylinder 60, and the elastic force by the elastic member 56 can be applied to the core block 31. As a result, since the load applied to the cylinder 60 can be reduced, the durability of the cylinder 60 can be improved.

  Next, a third embodiment will be described with reference to FIG. 9, FIG. 10, and FIG. In the first embodiment, the mold apparatus 1 that does not have an air blow mechanism that blows off moisture such as a casting burr between the core block 31 and the movable mold 20 or a release agent has been described. On the other hand, in 3rd Embodiment, the metal mold apparatus which has an air blow mechanism which blows off the casting burr | flash, mold release agent, etc. between the core block 31 and the movable mold | type 20 is demonstrated. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. In addition, even if the first embodiment and the third embodiment are different in shape, if the functions and the like are the same, the same reference numerals are given and the following description is omitted.

  FIG. 9 is a perspective view of the movable mold 20 and the connecting portion 70 of the mold apparatus according to the third embodiment. FIG. 10 is a plan view of the movable mold 20 and the connecting portion 70. 11 is a cross-sectional view of the movable mold 20 and the connecting portion 70 taken along the line XI-XI in FIG.

  As shown in FIGS. 9, 10, and 11, the connecting portion 70 is fixed to the movable mold 20 and is attached with the piston rod 42 (see FIG. 5A), and the core block 31 (see FIG. 1). It is a rectangular parallelepiped device that guides the sliding of the. The connecting portion 70 is a box-shaped fixing portion 71 fixed to the movable mold 20, an attachment portion 52 that is disposed in the fixing portion 71 and to which the piston rod 42 is attached, and extends from the attachment portion 52 into the fixing portion 71. The shaft-shaped part 53 provided, the annular flanges 54 and 55 which the shaft-shaped part 53 penetrates, and the elastic member 56 arrange | positioned between the flanges 54 and 55 are provided.

  The fixing portion 71 is a box-shaped member that constitutes the outer wall of the rectangular parallelepiped connecting portion 70 and has one surface opened. The fixing portion 71 is configured by standing a pair of rectangular plate-like side wall portions 51b, a front wall portion 73, and a rear wall portion 51d on four sides of a rectangular plate-like bottom surface portion 72. The fixing portion 71 is fixed to the movable die 20 using the screw 50a in a state where the bottom surface portion 72 is in contact with the movable die 20. Note that a cover (not shown) is attached to the surface of the fixed portion 71 where the opening is opened.

  The front wall portion 73 is a wall on the arrow D direction side. A recess 74 is formed in the front wall portion 73 so as to be recessed from the rear wall portion 51d side in the plate thickness direction (arrow D direction). By arranging the shaft-like portion 53 inside the recess 74, interference between the front wall portion 73 and the shaft-like portion 53 can be prevented.

  An air supply passage 75 that communicates with an air supply pipe (not shown) for supplying air and three air outlets 76 that communicate with the air supply passage 75 are formed on the bottom surface portion 72 and the front wall portion 73. It is formed. The air supply passage 75 is a passage that opens to an end portion in the arrow U direction of the bottom surface portion 72 and an end portion in the arrow L direction of the front wall portion 73.

  By connecting the air supply pipe to the opening formed in the bottom surface portion 72 of the air supply path 75, the air supply path 75 and the air supply pipe communicate with each other. The opening formed in the front wall portion 73 of the air supply passage 75 is closed by attaching a screw or the like.

  The three air outlets 76 communicate with the air supply passage 75 and open in the direction of the arrow D of the front wall 73 while having different directions. The opening of the air outlet 76 is directed to the regulation surface 29 of the movable mold 20. The regulation surface 29 is a surface that regulates the movement of the core block 31 relative to the movable mold 20 when the core block 31 comes into contact with the mold in the closed state.

  When air is sent from the air supply rod to the air supply passage 75, the opening formed in the front wall portion 73 of the air supply passage 75 is closed, so that the three air outlets 76 are directed toward the regulation surface 29. Air is ejected. By air-blowing the regulating surface 29 by an air blowing mechanism using the air supply passage 75 and the air blowing port 76, it is possible to blow off the casting burrs, mold release agents and the like formed on the regulating surface 29 during casting. Thereby, since deposition of casting burrs, mold release agents, and the like on the regulating surface 29 can be prevented, the core 30 and the core block 31 can be disposed at appropriate positions in the mold-closed state, and the core block 31 is formed by casting burrs. It is possible to prevent the movable mold 20 from being deformed.

  The air blow mechanism is often disposed between the plate member 24 and a guide member (connecting portion 70) that guides the sliding of the core block 31. However, when the guide member is also used as the connecting portion 70, the width of the guide member (dimension in the direction of the arrow FB) increases. As a result, it becomes difficult to access between the plate member 24 and the connecting portion 70 from the arrow U direction side, and it is difficult to provide an air blow mechanism between them.

  In addition, limit switches 77 are disposed at both ends of the movable mold 20 in the direction of arrow U and on both sides of the connecting portion 70 in the direction of arrow FB. The limit switch 77 is for detecting that the core block 31 is present at a predetermined position where the cylinder 40 is in a shortened state (ie, the mold apparatus is in an intermediate state). If the mold is closed when the core block 31 is not present at a predetermined position, the core block 31 and the fixed mold 10 may interfere with each other and the core block 31 and the fixed mold 10 may be damaged. Therefore, the core block 31 and the fixed mold 10 can be prevented from being damaged by controlling so that the mold cannot be closed when the limit switch 77 has not detected that the core block 31 exists at a predetermined position. As described above, the limit switch 77 is disposed at both ends of the movable die 20 in the direction of the arrow U and on both sides of the connecting portion 70 in the direction of the arrow FB, and therefore between the plate member 24 and the connecting portion 70. Access from the arrow U direction side becomes difficult, and it becomes more difficult to provide an air blow mechanism between them.

  As described above, it is difficult to provide an air blow mechanism between the plate member 24 and the connecting portion 70 depending on whether the connecting portion 70 also serves as a guide member or the position of the limit switch 77. In the third embodiment, the air blowing mechanism is used. By incorporating (the air supply passage 75 and the air outlet 76) in the connecting portion 70, the air blow mechanism can be easily provided. Furthermore, by incorporating the air blow mechanism in the connecting portion 70, the number of parts can be reduced as compared with the case where the air blow mechanism is separately provided.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to each said embodiment at all. It can be easily inferred that various improvements and modifications can be made without departing from the spirit of the present invention. For example, the shapes of the fixed mold 10, the movable mold 20, the core 30, the core block 31, the cylinders 40 and 60, the connecting portions 50 and 70, and the like are examples, and various shapes are naturally adopted. For example, the core block 31 is not limited to the case where the core block 31 is disposed in the fitting recess 23 of the movable mold 20 recessed in the direction of the arrow R, and the core block 31 can be disposed to face the flat portion of the movable mold 20. It is. Further, the stepped portion 36 can be a groove along the arrow UD direction, and the stepped portion 26 can be a guide protruding so as to fit into the groove-shaped stepped portion 36. Further, the contact portion 35 is not limited to the U shape, and the shape of the contact portion 35 can be appropriately set as long as the contact portion 35 can contact the cylinder tube side of the mounting portion 52 and the piston rods 42 and 61.

  Although the case where the core block 31 slides with respect to the movable mold 20 has been described in the first embodiment, the present invention is not necessarily limited thereto. It is naturally possible to slide the core block 31 with respect to the fixed mold 10. Of the fixed mold 10 and the movable mold 20, the one in which the core block 31 slides is the second mold, and the one that moves relative to the second mold in the direction of the arrow LR is the first mold.

  In the first embodiment, the opening / closing direction (arrow LR direction) in which the movable mold 20 moves relative to the fixed mold 10 and the sliding direction in which the core block 31 slides with respect to the movable mold 20 ( Although the case where the direction of the arrow UD is orthogonal to the above has been described, the present invention is not necessarily limited thereto. Needless to say, the opening / closing direction and the sliding direction can be made to intersect at directions other than orthogonal.

  In the first embodiment, the case where the groove portion 33 is provided on the first surface 31a of the core block 31 has been described. However, the present invention is not necessarily limited thereto. It is naturally possible to provide a groove on the sliding surface 24a of the movable mold 20 and arrange the connecting portion 50 in the groove. In this case, a gap between the pair of plate members 24 may be used. Moreover, it is possible to provide a groove part in each of the movable mold 20 and the core block 31.

  Further, the third surface 31c and the opposed surface 25a of the movable mold 20 can be formed as sliding surfaces that slide with each other by expansion and contraction of the cylinder 40. It is possible to provide a groove portion on the third surface 31c and the opposing surface 25a, and to arrange the connecting portion 50 in the groove portion.

  In the first embodiment, the case where the second contact surface 15 of the fixed mold 10 and the first contact surface 37a of the core block 31 are in surface contact with each other in the mold closed state has been described. However, the present invention is not limited to this. Absent. It is possible to omit the second contact surface 15 and bring the fixed mold 10 into contact with the first contact surface 37a, or to omit the first contact surface 37a and bring the core block 31 into contact with the second contact surface 15 It is. Further, the second contact surface 15 only needs to come into contact with the core block 31 when the mold is opened from the mold closed state to the intermediate state (die open state). Therefore, the second contact surface 15 and the core block are in the mold closed state. 31 can be opposed to each other in the arrow LR direction (opening / closing direction) in a non-contact manner. Similarly, the first contact surface 37a only needs to come into contact with the fixed mold 10 when the mold is opened. Therefore, the first contact surface 37a and the fixed mold 10 may be opposed to each other in the arrow LR direction in a closed state. Is possible. Further, the entire first contact surface 37a and the second contact surface 15 are not limited to the inclined surfaces that are inclined in the arrow U direction toward the arrow R direction (movable mold 20 side). A part of the second contact surface 15 can be an inclined surface.

  In the first embodiment, the notch 37 is provided by notching two corners by the second surface 31b of the core block 31, the pair of third surfaces 31c, 31c, and the fourth surface 31d. In the above description, the first contact surface 37a is provided, but the present invention is not necessarily limited thereto. The core block 31 is provided with holes, grooves, and notches into which the inclined blocks protruding from the fixed mold 10 in the direction of the arrow R (movable mold 20 side) can be inserted. It is possible to make the surface that has been used as the first contact surface. Of course, the shape of the inclined block of the fixed mold 10 is appropriately set according to the hole, groove, or notch of the core block 31.

  Although the case where the elastic member 56 is a coil spring has been described in the first embodiment, the invention is not necessarily limited thereto. For example, it is naturally possible to use a leaf spring, a disc spring, rubber or the like as an elastic member. Further, not only when the elastic member 56 is compressed and deformed between the fixed portion 51 and the mounting portion 52, the mounting portion 52 is disposed on the opposite side of the cylinder tube 41 with respect to the fixed portion 51, The elastic member can be pulled and deformed between the mounting portion 52.

  In the first embodiment, the connecting portion 50 in which the nuts 50b, 50c, and 50d are fitted into the shaft-like portion 53 fixed to the mounting portion 52, or the shaft-like portion 53 is inserted into the flanges 54 and 55 and the elastic member 56. Although described, it is not necessarily limited to this. For example, the elastic member 56 can be directly compressed between the mounting portion 52 and the front wall portion 51c of the fixing portion 51 by omitting the shaft-like portion 53, the nuts 50b, 50c, and 50d and the flanges 54 and 55. . It is also possible to omit a part of the shaft-like portion 53, the nuts 50b, 50c, 50d, and the flanges 54, 55.

  In the first embodiment, the case where the insertion hole 27 of the movable mold 20 and the insertion hole 37b of the core block 31 communicate with each other in the extended state of the cylinder 40 has been described, but the present invention is not necessarily limited thereto. Of course, it is possible to arrange the insertion hole 27 and the insertion hole 37b so that the insertion hole 27 and the insertion hole 37b communicate with each other in the shortened state in which the cylinder 40 is shortened the most. The position where the insertion hole 27 is provided in the movable mold 20 and the position where the insertion hole 37b is provided in the core block 31 can be set as appropriate. In addition, the insertion hole 27 is not limited to the case where the core block 31 is penetrated and the insertion hole 37b is provided in the fitting recess 23, but the insertion that can communicate in the direction of the arrow FB while opening to the fixed mold 10 side. It is possible to provide holes at predetermined positions of the core block 31 and the fixing member 25.

  In the first embodiment, the case where the core block 31 is attached to the movable mold 20 by inserting the insertion hole 37b into the insertion member 28 inserted into the insertion hole 27 in the extended state of the cylinder 40 has been described. It is not limited to this. When the cylinder 40 is extended or shortened, marks such as figures and lines can be provided at positions where the movable mold 20 and the core block 31 are visible.

  In the first embodiment, the case where the small diameter portion 44 and the large diameter portion 45 of the piston rod 42 are detachably attached to the fitting portion 52a of the attachment portion 52 in the direction of the arrow LR has been described. It is not something that can be done. It is possible to provide a threaded portion with a thread formed on the outer peripheral surface at the tip of the piston rod 42 and fasten the threaded portion of the piston rod 42 into a threaded hole formed in the mounting portion 52.

  In the first embodiment described above, the case where the stopper surface 32 is formed in a portion where a part of the second block 31b and the fifth block 31e of the core block 31 in the direction of the arrow FB is cut out is described. However, it is not necessarily limited to this. Of course, it is possible to provide the stopper surface 32 at a portion where the corners of the second surface 31b and the fifth surface 31e of the core block 31 are cut out over the entire length in the direction of the arrow FB. In this case, in order to secure a space for the fifth surface 31e to which the pipe 38 is attached, the stopper surface 32 may be formed, for example, in an E shape when viewed in the direction of the arrow U.

  In the first embodiment, the case where the movement of the core block 31 in the direction of the arrow LR relative to the movable mold 20 between the stepped portion 26 of the pair of fixing members 25 and the plate member 24 is restricted has been described. However, it is not necessarily limited to this. The plate member 24 is provided so as to extend away from the connecting portion 50, the plate member 24 and the fixing member 25 are integrated, and a core is formed in a groove formed between the stepped portion 26 of the fixing member 25 and the plate member 24. It is naturally possible to restrict the movement of the core block 31 in the direction of the arrow LR by fitting between the step portion 36 of the block 31 and the first surface 31a.

  In the second embodiment, the case where the cylinder tube 41 side of the connecting portion 64 that connects the proximal end portion 62 and the distal end portion 63 of the piston rod 61 contacts the contact portion 35 has been described. However, the present invention is not limited to this. is not. It is naturally possible to provide a portion that protrudes radially outward from the outer peripheral surface of the piston rod and to bring the protruding portion of the piston rod into contact with the contact portion 35 on the cylinder tube 41 side. In this case as well, the pressing force in the direction of the arrow D by the stopper 13 can be applied to the elastic member 56 without applying a force to expand and contract the cylinder, and the elastic force by the elastic member 56 can be applied to the core block 31. . As a result, the load on the cylinder can be reduced, and the durability of the cylinder can be improved. When providing a portion projecting radially outward from the outer peripheral surface of the piston rod, the through hole 34a of the cylinder mounting portion 34 is opened in the direction of the arrow R so that the piston rod can be removed from the through hole 34a. There is a need.

  In the second embodiment, the case where the connection part 64 is positioned between the contact part 35 and the attachment part 52 and the connection part 64 contacts the contact part 35 has been described. However, the present invention is not necessarily limited thereto. . Naturally, it is possible to move the contact portion 35 away from the cylinder attachment portion 34, position the contact portion 35 between the connection portion 64 and the attachment portion 52, and bring the attachment portion 52 into contact with the contact portion 35. In this case, the cylinder mounting portion 34 is provided at a portion extended from the fifth surface 31e of the core block 31 in the direction of the arrow U, and the portion extended in the direction of the arrow U is at least in the directions of the arrows L, R, F, and B. Opening to one side can facilitate access to the connecting portion 64.

  In each of the above-described embodiments, the case where the fixing portions 51 and 71 are box-shaped members having one surface opened has been described. However, the present invention is not necessarily limited to this, and the shapes of the fixing portions 51 and 71 can be set as appropriate. is there. For example, a box-shaped member that does not have an opening except for the through hole 51f and is divided into two in the direction of the arrow LR can be used as the fixed portion. In addition to the arrow L direction, a box-shaped member that opens in the direction of the arrow UD is used as a fixed part, and the front wall part 51c and the rear wall part 51d are projected from the pair of side wall parts 51b toward each other. Is possible.

1 Mold device 2 Cavity 10 Fixed mold (first mold or second mold)
13 Stopper 15 Second contact surface (inclined surface)
20 Movable type (first type or second type)
24a Sliding surface 27, 37b Insertion hole 30 Core 31 Core block 31a First surface (sliding surface)
33 Groove part 35 Contact part 37a First contact surface (inclined surface)
40 Cylinder 41 Cylinder tube 42, 61 Piston rod 50, 70 Connecting portion 51, 71 Fixed portion 52 Mounting portion 52a Fitting portion 56 Elastic member

Claims (6)

The first type;
A second mold that moves relative to the first mold in the opening and closing direction;
A core inserted between the first mold and the second mold in a closed state in which the first mold and the second mold are in contact with each other in the opening and closing direction;
A core block that slides in a sliding direction that intersects the opening and closing direction with respect to the second mold, the core being fixed;
A cylinder in which a piston rod protrudes from a cylinder tube fixed to the core block and expands and contracts in the sliding direction;
A connecting portion to which the piston rod is attached and fixed to the second mold,
At least one of the second mold or the core block includes a groove provided to extend in the sliding direction by denting a sliding surface on which the opposing second mold or the core block slides,
The mold apparatus according to claim 1, wherein the connecting portion is disposed in the groove portion. The groove is provided in the core block,
2. The mold apparatus according to claim 1, wherein the connecting portion is fitted into the groove portion to guide the sliding of the core block with respect to the second mold. The core block includes a first contact surface facing an extension direction in which the piston rod protrudes from the cylinder tube,
The first mold includes a second contact surface facing a shortening direction opposite to the extending direction,
At least one of the first contact surface or the second contact surface includes an inclined surface that inclines in the shortening direction toward the second mold side,
The inclined surface is disposed so as to come into contact with the first mold or the core block when the second mold is moved relative to the first mold in the opening / closing direction from the mold closed state. The mold apparatus according to claim 1 or 2. The connecting portion includes a fixing portion fixed to the second mold,
An attachment part to which the piston rod is attached, which moves in the sliding direction with respect to the fixed part;
An elastic member for urging the mounting portion with respect to the fixed portion by an elastic force in the shortening direction;
The mold apparatus according to claim 3, wherein the first mold includes a stopper that presses the core block in the extending direction when the mold is closed.   The mold apparatus according to claim 4, wherein the core block includes a contact portion that contacts the mounting portion or the cylinder tube side of the piston rod in a shortened state of the cylinder. The connecting portion includes a fitting portion in which the piston rod is detachably fitted and fixed in the opening and closing direction,
The second mold and the core block are each provided with an insertion hole that communicates with each other and allows the same insertion member to be inserted in the opening / closing direction when the cylinder is extended or shortened. Item 6. The mold apparatus according to any one of Items 1 to 5.

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