JP5478287B2 - Mold mounting member and mold mounting method for injection molding machine - Google Patents

Description

  The present invention relates to a mold mounting structure for a movable mold plate and a fixed mold plate of an injection molding machine, and in particular, when performing mold closing and mold clamping operations, the movable mold and the fixed mold are accurately fitted. Thus, the present invention relates to a mold positioning device attached to a mold platen.

  In an injection molding machine in which a mold is attached to each of a fixed mold platen and a movable mold platen, both mold plates are closed and the mold is clamped to inject a resin material into a cavity to be formed. A taper shape provided on the upper surface of the horizontal surface on the fixed mold platen side, in which a heavy metal mold is hung from above and lowered to a horizontal plane that is a reference height provided on the mold platen, and is positioned horizontally. It is usual that this convex shaped member is made by fitting into a tapered concave groove formed on the lower surface of the mold.

  However, the positioning mechanism based on the combination of the tapered convex member and the tapered groove has a reference height because there is a processing error in the width, height, and taper angle of the tapered convex member and the groove. In many cases, the horizontal surface and the tapered surface for positioning in the horizontal direction do not adhere to each other at the same time. In this case, the reference height and horizontal positioning cannot be accurately performed, and the fitting between the mold and the mold becomes uncertain, and the mold is damaged, or the cavity is distorted and a defective molded product is molded. It causes a defect.

  In order to solve these problems, in Patent Document 1, a positioning pin (equivalent to the tapered convex member described above) is installed so as to slide in an insertion hole provided in a positioning block fixed to the mold platen. The width and height of the tapered groove on the mold side is such that the positioning pin is slidable vertically by sandwiching an elastic member between the bottom of the positioning pin and the bottom of the insertion hole of the positioning block. In addition, a positioning structure has been proposed that allows the machining error of the taper angle to be tolerated, accurately positions the mold, and avoids defects such as defective mold products due to mold damage and cavity distortion. .

JP-A-11-320620

  A conventional mold positioning means in which a taper-shaped convex member is fitted into a taper-shaped concave groove formed on the lower surface of the mold is a positioning taper-shaped convex member and a taper-shaped concave groove on the mold side. Due to the processing errors that exist in each of them, the reference height horizontal plane and the taper surface in the horizontal direction do not adhere at the same time, and a gap is generated in either the horizontal plane (vertical direction) or the horizontal direction, which lowers the positioning accuracy of the mold. To do.

  The mold positioning device proposed in Patent Document 1 also requires a gap between the positioning pin and the sliding hole of the positioning pin, and the positioning pin floats in the horizontal direction (left and right direction). Position accuracy will be reduced. In addition, since the positioning pin has a sliding structure, when the die, which is a heavy object that is floating without being restrained, is suspended and positioned on the mold platen, there is an offset load or impact load on the positioning pin. Slide while joining. For this reason, there is a possibility of causing an increase in gap due to wear of the sliding part, sliding failure, and squeezing (adhesion) during repeated positioning by replacing the mold.

  An object of the present invention is to provide a mold mounting member that can accurately position a mold, has a simple structure, is inexpensive, and has a long service life.

With respect to the above problems, the present invention aims to solve the problems by the following means.
(1) The mold attaching member of the first means is attached to each of a plurality of molds facing each other and capable of relatively opening and closing by attaching the mold, and the plurality of molds facing each other. Opening and closing operation is relatively performed by attaching a die that forms a cavity inside, a tapered concave part provided on the lower end surface of the die, and a mold that abuts with each other by closing operations of a plurality of facing molds. A taper surface of the taper-shaped concave portion of the mold, which is provided at the lower part of one or both of the possible mold plates and has a horizontal plane for receiving the weight of the mold to be hung and at the same time positioning in the vertical direction It fits into, and one of the tapered shaped convex-shaped portion for positioning the lateral direction, Ri Do from the positioning member having a single resilient portion formed integrally with the one tapered convex portion, The elastic part is the tapered convex part. A plate-like portion between the hole formed on the side and the upper surface provided with the tapered convex portion, and the tapered concave portion of the mold is fitted into the tapered convex portion. When the convex portion is pushed down, the plate-like portion is elastically deformed downward until the bottom surface of the die comes into contact with the upper die support surface of the positioning device .

( 2 ) The mold attachment members of the second means are respectively attached to a plurality of opposed molds that can be opened and closed relatively by attaching a mold, and the plurality of opposed mold boards, The molds that contact each other by the closing operation of the plurality of facing molds to form a cavity therein, and one mold mounting surface of the plurality of facing molds facing each other or a plane parallel to the mold mounting surface A tapered concave portion having a tapered concave shape, and a mold mounting surface of the other mold plate facing the one mold plate provided with the tapered concave shape portion or the die provided the mold mounting surface and a plane parallel comprises a tapered convex portion fitted, the resilient portion formed integral with the tapered convex portion to the tapered surface of the tapered concave portion, wherein The elasticity formed integrally with the tapered convex portion Is a plate-like portion between a hole drilled below the tapered convex portion and a surface provided with the tapered convex portion, and the tapered convex portion becomes the tapered concave portion. After the fitting, the plate-like portion is deformed so that the taper surface of the taper-shaped convex portion and the taper surface of the taper-shaped concave member abut at the same time as the die mating surface of the mold. characterized in that it was.

( 3 ) The mold mounting member of the third means is a mold plate that can be relatively opened and closed as described in (1) or (2) above: a fixed mold plate, a movable mold plate, the fixed mold plate, and the It is a reversal type | mold board provided between the movable type | mold boards and having a rotating shaft in the perpendicular direction, It is characterized by the above-mentioned.

( 4 ) The mold mounting method of the fourth means is a mold mounting method using the mold mounting member of ( 3 ) above, and the positioning members are symmetrical with respect to the mold mounting surface of the reversal mold platen. After the positioning member fixing process to be assembled at a proper position, the reversing mold is positioned by the positioning member, and attached to the fixed mold plate or the movable mold plate attached to both mold mounting surfaces of the reversing mold plate. The mold fixing process 1 for assembling and fixing each of the reversing molds integrated with the movable mold to be fixed is performed, and after the mold fixing process 1, the fixed side molds integrated with the reversing molds respectively. And performing a mold fixing process 2 in which the movable mold is assembled and fixed to the fixed mold plate or the movable mold plate.

The invention according to claim 1 is the mold mounting member of the first means, wherein the tapered convex portion is supported by an elastic portion integral with the tapered convex portion, and the weight of the mold when the mold is mounted. The tapered portion of the tapered convex portion of the positioning member in the left and right direction contacts the tapered surface of the tapered concave portion of the lower end surface of the mold and is positioned by restraining the left and right directions, and then the elastic portion is By elastically deforming due to the weight of the mold, the taper-shaped convex part comes into contact with the taper-shaped concave part provided on the mold and moves in a small direction downward while restraining in the left-right direction. The structure is such that the positioning in the left-right direction and the up-down direction are constrained simultaneously by abutting against the horizontal surface (die support surface) of the positioning member for positioning in the up-down direction. As a result, the sliding portion can be eliminated, so that the accuracy of the mounting position is not reduced due to the clearance of the sliding portion as in the conventional example, and wear and malfunction due to the sliding structure do not occur.

  Further, since the elastic deformation force can be easily calculated from the dimensions of the corresponding part and the bending strength of the material, the positioning member can be easily designed, and the cost can be reduced because a simple integrated structure can be achieved.

The invention according to claim 2 is the mold attachment member of the second means, and can position the opposing molds in the vertical and horizontal directions at the time of clamping, so that a positioning pin between the opposing molds is provided. This is unnecessary and has the effect of enabling more accurate mold matching.

The invention according to claim 3 is a mold mounting member of the third means, and is provided between the fixed mold plate and the movable mold plate, and is provided between the fixed mold plate and the movable mold plate and has a rotation axis in the vertical direction. In a mold plate reversing type two-material injection molding machine having a reversing mold plate, two reversing molds mounted on the mold mounting surface of the reversing mold plate are a fixed mold plate side mold and a movable mold plate that face each other before and after reversing. Because the mold is matched and clamped to both side molds, accurate positioning when mounting the mold on the fixed mold board, movable mold board, and reversing mold board, and accurate mold positioning when clamping the mold Thus, it is possible to prevent damage caused by mold misalignment during mold matching and mold clamping.

The invention according to claim 4 is the mold attaching method of the fourth means, wherein the fixed side mold and the movable side mold are connected to the mold mounting surface of the reversing mold board on the fixed mold board or the movable mold board. Assembly and fixation at symmetrical positions can be performed in a short time and with high accuracy, so that the fixed mold and the movable mold that are newly opposed to each other after the reversing mold is reversed are positioned at opposite positions. It is possible to efficiently perform a mold mounting process capable of preventing damage due to collision or partial contact due to displacement.

1 is a side view of an injection molding machine according to a first embodiment of the present invention. It is the front view which looked at the fixed mold board of the injection molding machine of FIG. 1 from the B direction. It is a perspective view which shows the state which attaches a metal mold | die to the fixed mold base of the injection molding machine of FIG. FIG. 3 is an enlarged view of a positioning member of a portion C in FIG. 2 and its surroundings. It is a figure which shows that the metal mold | die was inserted in the positioning member of FIG. 4, and the elastic part deform | transformed. It is a side view of the injection molding machine which shows the metal mold positioning member of the 2nd Embodiment of this invention in the range of A of FIG. It is the bottom view which looked at the metallic mold positioning member of Drawing 6 from the D direction. FIG. 8 is a perspective view of the mold positioning member of FIGS. 6 and 7.

It is a side view of the injection molding machine which shows the metal mold positioning member of the 3rd Embodiment of this invention in the range of A of FIG. FIG. 10 is a bottom view of the mold positioning member of FIG. 9 as viewed from the E direction. It is a perspective view of the metal mold positioning member of FIG. 9, FIG. FIG. 6 is a plan view of a mold reversing type two-material molding injection machine equipped with the positioning member of FIG. 4 according to a fourth embodiment of the present invention. FIG. 13 is a side view of the mold reversing type two-material molding injection machine of FIG. 12. It is a side view of the die reversal type two-material molding injection machine concerning the 5th embodiment of the present invention. FIG. 15 is a perspective view of a mold positioning member attached to the mold reversing type two-material molding machine of FIG. 14.

(First embodiment)
In the injection molding apparatus described in this embodiment, a mold plate that can be relatively opened and closed by attaching a mold is a fixed mold plate and a movable mold plate, and a mold positioning member is fixed to the fixed mold plate. A mold mounting member that attaches the movable mold to the movable mold in accordance with the position of the fixed mold.

  A first embodiment will be described with reference to the drawings. FIG. 1 is a side view of an injection molding machine according to the first embodiment, FIG. 2 is a front view of a fixed mold platen of the injection molding machine of FIG. 1 viewed from the direction B, and FIG. 3 is a diagram of the injection molding machine of FIG. FIG. 4 is a perspective view showing a state in which the mold is attached to the fixed mold platen, FIG. 4 is an enlarged view of the positioning member of C part in FIG. 2 and its surroundings, and FIG. 5 is a perspective view of FIG. It is a figure which shows the state which the elastic part which supports a positioning convex-shaped member deform | transforms, and the metal mold | die contact | abutted on the upper surface of the positioning member, and was positioned to the up-down and left-right directions.

  A schematic configuration of the injection molding machine 10 will be described with reference to the drawings. Reference numeral 1 denotes a base, and a fixed mold plate 2 to which a fixed mold 4 is attached is fixed to the base 1. A movable mold 3 for mounting the movable mold 5 is placed so as to be movable so as to face the fixed mold 2 on the base 1. The movable platen 3 moves while being guided by a guide rail (not shown) fixed to the base 1.

  The movable platen opening / closing means 14 fixed to the base 1 is composed of a ball screw shaft 12 which is supported by a servo motor and supported by a servo motor, which is free to rotate with one end of the base plate 1 in the axial direction, The ball screw nut 13 is screwed and fixed to the movable mold platen 3. The movable side mold 5 and the fixed side mold 4 are clamped by a tie bar 7 having a hydraulic cylinder at one end to form a cavity, and the resin material melted from the injection unit 11 is injected and filled into the cavity.

  When the mold is attached to the fixed mold platen 2, as shown in FIG. 3, the ears 4c, 5a, 4b, 5b provided on both sides of the molds 4, 5 are provided with turnbuckle bolts 32, bolts 33, etc. The fixed mold 4 and the movable mold 5 are combined in a fitting state in which a cavity is formed, a wire 31 is hung on the bolt 32, and is suspended from above the fixed mold by a crane (not shown). 2 is lowered so that the convex shape portion of the positioning member 15 and the concave shape portion 4a of the mold fitted to the positioning member 15 are fitted to each other. In the present embodiment, an example in which the concave portion is provided in the mold itself has been described, but there is no problem even if a member different from the mold having the concave shape is assembled to the mold.

  FIG. 2 shows a state in which the fixed mold 4 is fitted and positioned on a positioning member 15 fixed to the fixed mold platen 2. 4 and 5 are enlarged views of part C in FIG. 2. FIG. 4 shows a state immediately before the concave part 4a of the mold 4 is fitted into the convex part 15a of the positioning member 15, and FIG. 4b is in contact with the mold support surface 15b which is a flat portion on the positioning member 15, and the concave shape portion 4a is fitted to the convex shape portion 15a of the positioning member 15.

  The taper angle of the concave shape portion 4a of the mold 4 is formed to be the same as or larger than the taper angle of the convex shape portion 15a of the positioning member 15, for example, the mold of the concave shape portion 4a of the mold 4 When the width a on the bottom surface of the mold is made slightly narrower than the width b at the base of the convex portion 15 a of the positioning member 15, the concave portion 4 a is concave when the concave portion 4 a fits into the convex portion 15 a of the positioning member 15. In a state where both tapered surfaces of the shape portion 4a and both taper surfaces of the convex shape portion 15a are in contact with each other without any gap and are positioned in the left-right direction, the convex shape portion 15a of the positioning member 15 is slightly pushed down by the weight of the mold 4, The lower part 4b of the mold 4 and the mold support surface 15b of the positioning member 15 come into contact with each other, and the vertical direction is positioned without any gap. A long hole 15c is formed in the positioning member 15, and a portion between the long hole 15c and the mold support surface 15b has a plate shape to form an elastic body. It is preferable that the long hole 15c is a long and narrow long hole with which the beam length can be freely taken so that a desired elastic deformation amount and elastic rigidity can be easily obtained at the time of designing.

  In the positioning means by the positioning member 15 having such a structure, the convex portion 15a of the positioning member 15 and the mold support surface 15b are integrated and there is no sliding portion. With the mold support surface 15b as a separate part, there is no reduction in the accuracy of the mounting position, sliding wear, or malfunction due to the clearance between the sliding portions required when the convex portion and the positioning member are moved relative to each other. The elastic deformation force can be easily calculated from the length and depth of the hole 15c of the corresponding part positioning member 15, the thickness of the elastic body, and the bending strength of the material.

(Second Embodiment)
In the second embodiment, in the same injection molding machine 10 as the injection molding machine having the mold mounting member of the first embodiment, the fixed side mold 4 and the movable side mold 5 are used when the mold is clamped. Relative positioning means for the fixed mold plate 2 and the movable mold plate 3 to which the fixed mold 4 and the movable mold 5 are fixed are provided so as to make smooth contact. The configuration other than that is the same as the mold mounting member of the first embodiment, and will be described based on the following drawings. 6 is a side view of an injection molding machine showing the mold positioning member of the present embodiment in the range of A in FIG. 1, FIG. 7 is a bottom view of the mold positioning member of FIG. 6 viewed from the D direction, and FIG. FIG. 8 is a perspective view of the mold positioning member of FIGS. 6 and 7. Further, in the present embodiment, an embodiment in which a conical taper shape is used as the taper shape is shown in order to prevent a positional deviation that may occur in all directions of the upper, lower, left and right directions on the mold platen.

  In the figure, a conical taper-shaped convex member 27 is fixed to the lower part of the fixed mold platen 2. The conical taper-shaped convex member 27 has a predetermined conical taper-shaped convex portion 27a provided so as to protrude from a plane 27b parallel to the mold mounting surface of the fixed mold platen 2, and below the conical taper-shaped convex portion 27a. A long hole 27c is formed inside the member (right side in the drawing), and a plate-like portion between the long hole 27c and the flat surface 27b forms an elastic body. The conical taper-shaped convex part 27a of the conical taper-shaped convex member 27 is supported by the elastic body when pushed in a little, and the vertical direction is restrained in position, so that the horizontal positioning is ensured on the mold plate mounting surface without a gap. Is done. Note that the long hole 27c is preferably a long and narrow long hole that allows the beam length to be freely taken so that a desired elastic deformation amount and elastic rigidity can be easily obtained at the time of design.

  A conical taper-shaped concave member 28 is fixed to the lower part of the movable mold 3 facing the fixed mold 2. The conical taper-shaped concave member 28 has a flat surface 28b parallel to the mounting surface of the movable mold 3, and the conical taper that can be fitted to the conical taper-shaped convex portion 27a of the conical taper-shaped convex member 27 on the flat surface 28b. A conical taper-shaped concave shape portion 28a having a taper angle that is the same as or larger than the conical taper-shaped convex shape portion 27a is perforated. For example, when the diameter of the entrance of the conical tapered concave portion 28a is made slightly smaller than the diameter of the root of the conical tapered convex portion 27a of the conical tapered convex member 27, the conical tapered convex portion 27a is formed. After abutting and fitting with the conical taper-shaped concave portion 28 a without a gap, the conical taper-shaped convex shape portion 27 a is slightly pushed into the conical taper-shaped convex member 27.

  When the movable mold 3 is hydraulically clamped via the fixed mold 2 and the tie bar 7, the conical tapered convex portion 27 a of the conical tapered convex member 27 is conical tapered concave of the conical tapered concave member 28. The movable mold platen 3 is positioned with respect to the fixed mold platen 2 by being fitted to the shape portion 28a. As a result, the fixed mold 4 attached to the fixed mold 2 and the movable mold 5 attached to the movable mold 3 are positioned accurately in the vertical and horizontal directions. 5 can contact smoothly.

One or more combinations of the conical tapered convex member 27 and the conical tapered concave member 28 may be provided. Further, depending on the structure of the mold, the fixed side mold 4 and the movable side mold 5 may be attached. As described above, for positioning when the mold 4 and the mold 5 are combined and attached to the fixed mold platen 2, the mold positioning member 15 may be provided on the fixed mold platen 2, as shown in FIG. A die positioning member 26 in which the conical tapered convex member 27 and the die positioning member 15 are integrated may be used. In any case, the positioning of the conical tapered convex member 27 and the conical tapered concave member 28 needs to be surely performed before the injection molding machine 10 is operated.
Since it is the same as that of 1st Embodiment except having described above, description of another structure and an effect | action is omitted.

(Third embodiment)
The third embodiment is the same injection molding machine 10 as the injection molding machine provided with the mold mounting member of the first embodiment, provided with mold positioning means for mold clamping. The convex portion 15a of the mold mounting positioning member 15 of the first embodiment is formed as a convex member 45 in the mold clamping direction, and the convex member 45 is formed on the movable mold plate 3 facing the fixed mold plate 2. Means for fixing the mold in the horizontal direction when the mold is clamped by fixing the concave mold member 46 having the concave part 46a facing in the opposite direction so that the convex part 45a is fitted. The configuration other than the above means is the same as that of the injection molding machine of the first embodiment, and will be described with reference to the following drawings.

  9 is a side view of an injection molding machine showing the mold positioning member of the present embodiment in the range of A in FIG. 1, FIG. 10 is a bottom view of the mold positioning member of FIG. 9 viewed from the E direction, and FIG. It is a perspective view of the metal mold positioning member of FIG. 9, FIG.

  In the figure, a convex member 45 is provided below the fixed mold platen 2. The convex member 45 has a convex portion 45a having a predetermined taper provided so as to protrude from a plane 45b parallel to the mold mounting surface of the fixed mold platen 2, and a long hole is formed inside the base member of the convex portion 45a. 45c is opened, and the plate-like portion between the long hole 45c and the flat surface 45b forms an elastic body. When the convex portion 45a of the convex member 45 is pushed in a little, the elastic body bends, but positioning without a gap in the left-right direction with respect to the board surface is ensured. The long hole 45c is preferably a long and narrow long hole so that a desired elastic deformation amount and elastic rigidity can be easily obtained at the time of design.

A concave member 46 is fixed to the lower part of the movable mold 3 facing the movable mold 2. The concave member 46 has a flat surface 46b parallel to the mounting surface of the movable mold platen 3. The concave member 46 can be fitted into the convex portion 45a of the convex member 45 on the flat surface 46b, and has the same taper angle as the convex portion 45a. A shape portion 46a is formed.
The width of the inlet of the concave portion 46a is made slightly smaller than the diameter of the root of the convex portion 45a, and after the convex portion 45a abuts and fits into the concave portion 46a without any gap, the plate-like elastic body is deformed. Then, the convex portion 45 a is slightly pushed into the convex member 45.

  When the movable mold 3 is hydraulically clamped via the fixed mold 2 and the tie bar 7, the convex part 45 a of the convex member 45 is fitted into the concave part 46 a of the concave member 46 without any gap, so that the fixed mold 2 The fixed mold 4 attached to the movable mold 5 and the movable mold 5 attached to the movable mold platen 3 are accurately positioned right and left.

  In addition, the tapered shape portion of the third embodiment has a conical taper shape, whereas in this embodiment, the tapered surface has a planar shape, so that the tapered convex shape portion and the tapered concave shape portion have a flat shape. The contact surface pressure of the contact portion can be reduced, and wear of the tapered surface can be reduced. Further, since the taper surface is oriented in the horizontal direction, it is not restrained in the vertical direction, so that the position of the movable mold plate 3 in the vertical direction with respect to the fixed mold plate 2 due to secular change such as wear or deformation due to the weight of the mold or the platen. Even when a deviation or the like occurs, an offset load is not generated on the positioning member, which is effective in preventing a failure of the positioning member.

  The combination of the convex member 45 and the concave member 46 may be attached to the fixed mold 4 and the movable mold 5 depending on the structure of the mold. As described above, the mold positioning member 15 may be provided on the mold platen 2 for positioning when the mold 4 and the mold 5 are attached to the fixed mold platen 2 in combination. In any case, the positioning of the combination of the convex member 45 and the concave member 46 needs to be reliably performed before the injection molding machine 10 is operated. Since it is the same as that of 1st Embodiment except having described above, description of another structure and an effect | action is omitted.

(Fourth embodiment)
In this embodiment, the mold mounting member of the present invention is mounted on a mold reversing type two-material injection molding machine.
A fourth embodiment will be described with reference to the drawings. FIG. 12 is a plan view of the mold reversing type two-material molding injection machine to which the positioning member of FIG. 4 is attached according to the present embodiment, and FIG. 13 is a side view of the mold reversing type two-material molding injection machine of FIG. FIG.

  A schematic configuration of the mold reversal type two-material injection molding machine 30 will be described with reference to the drawings. Reference numeral 31 denotes a base. A fixed mold plate 32 to which a fixed mold 34 is attached is fixed to the base 31. A movable mold plate 33 to which a movable mold 35 is attached is placed so as to be movable so as to face the fixed mold plate 32 on the base 31. The reversing mold 39 is placed on the reversing table 37 and rotated forward and reverse by 180 degrees around the longitudinal central axis, and positioned at an angular position facing the fixed mold 32 and the movable mold 33. The movable platen 33 and the reverse table 37 on which the reverse platen 39 is placed are guided by a guide rail (not shown) fixed to the base 31 and moved.

  A reverse mold A36A and a reverse mold B36B having the same shape are attached to the mold mounting surface of the reverse mold board 39, and the movable side mold 35 and the fixed side mold 34 are clamped to form a cavity. Different resin materials from the two sets of the injection unit 41 and the injection unit 42 are formed in the two cavities formed when the fixed mold 32, the reversal mold 39, and the movable mold 33 are simultaneously clamped by the clamping means. Each is injection filled.

  A pair of movable mold plate opening / closing means 23 and 23 are installed symmetrically on both sides of the mold reversing type two-material injection molding machine 30. The movable platen opening / closing means 23 is synchronously operated by a pair of servo motors, and the movable platen 33 can be opened and closed in parallel. The pair of reversing mold plate opening / closing means 24 and 24 installed symmetrically on both sides of the two-material molding injection molding machine 30 are operated in synchronism with a pair of servo motors, and the reversing table 37 can be opened and closed in parallel.

  The mold positioning member 15 can be mounted on both mold mounting surfaces of the reversing mold board 39, and can be fitted into the tapered surfaces of the convex portions 15a of the positioning member 15 in the reversing mold A36A and the reversing mold B36B. By providing the tapered concave portion 4a having the form shown in FIG. 5-5, the fixed side mold 34 and the reverse mold A36A or the movable side mold 35 and the reverse mold B36B are integrated as shown in FIG. When mounting by hanging on the mold, the convex portion 15a of the positioning member 15 and the mold support surface 15b can be used to position the mold in the vertical and horizontal directions.

  At this time, each positioning member 15 is preferably assembled at a position (that is, a mirror image position) symmetrical with respect to the mold mounting surface of the reversal mold 39. The reversing mold A36A and the reversing mold B36B positioned by the positioning member 15 are symmetrical with respect to the mold mounting surface of the reversing mold plate 39 by assembling the positioning member 15 at a position symmetrical to the mold mounting surface. Can be assembled at any position. As a result, the fixed mold 34 and the movable mold 35 integrated with the reversal mold A36A and the reversal mold B36B, respectively, are attached to the fixed mold board 32 or the movable mold board 33. It can be assembled with high accuracy at a position symmetrical to the surface.

  Assembling the fixed-side mold 34 and the movable-side mold 35 to the fixed mold 32 or the movable mold 33 at a symmetric position with respect to the mold mounting surface of the reversing mold 39 is possible by reversing the mold A36A or The reversal mold B36B is effective in preventing damage due to a collision or a single contact caused by a deviation of the opposed positions of the fixed-side mold 35 and the movable-side mold 36 that are newly opposed to each other after the reversal. Therefore, it is preferable that the positioning member 15 is mounted on both mold mounting surfaces of the reversal mold 39 so that the positioning member 15 is symmetrical with respect to the mold mounting surface of the reversal mold 39.

(Fifth embodiment)
In the present embodiment, the mold reversing type two-material molding injection machine is provided with a positioning member for mounting the mold, which is the mold mounting member of the present invention, on the mold platen, and the mold during mold clamping. An example in which positioning means are used at the same time is shown, and will be described with reference to the drawings.
FIG. 14 is a side view of a mold reversing type two-material molding injection machine according to this embodiment, and FIG. 15 is a fourth embodiment attached to the mold reversing type two-material molding injection machine of FIG. FIG. 5 is a perspective view of a mold positioning member in which a positioning member having a taper shape in a mold opening / closing direction for positioning the mold plate is formed integrally with the mold positioning member shown.

  In the figure, a two-material injection molding machine 40 is provided with a mold reversal type two-material injection molding machine 30 according to the fourth embodiment provided with a mold alignment positioning means at the time of clamping, and the other configuration is a metal mold. Since it is the same as the mold reversal type two-material injection molding machine 30, only different configurations will be described.

  A mold positioning member 26 is mounted on both mold mounting surfaces of the reversal mold 39, and a positioning tapered member 28 is mounted on the fixed mold 32 and the movable mold 33, so that the fixed mold 32 and the movable mold By positioning 33 with respect to the reversal mold 39, even if the reversal mold 39 is repeatedly reversed and clamped, the fixed mold 32 and the reversal mold 36A on both sides and the reversal mold 36B This is a two-material injection molding machine 40 in which the fixed mold 34 and the movable mold 35 attached to the movable mold plate 33 are positioned accurately and accurately.

  When the fixed side mold 34 and the reverse mold A36A, or the movable side mold 35 and the reverse mold B36B are collectively suspended and attached, the taper-shaped convex portion 26a of the positioning member 26 and the mold support surface 26b are used. A36A and reversal mold B36B are positioned in the vertical and horizontal directions, and there is no gap between the tapered convex part 26f of mold positioning member 26 and the tapered convex part 28 of positioning taper member 28 when clamping the mold. By positioning the fixed mold plate 32 and the movable mold plate 33 with respect to the reversing mold plate 39 with the fitting tapered shape portion, the fixed mold plate 32 and the reversing mold 36B are movable with respect to the reversing mold 36A and 36B. The fixed mold 34 and the movable mold 35 attached to the mold plate 33 can be positioned without misalignment even after the mold is reversed.

  As a result, even if a deviation or inclination occurs with respect to the fixed mold base 32 due to the mold opening / closing operation clearance between the reverse mold base 39 and the movable mold base 33, the reverse mold 36A and the reverse mold 36B are fixed to the fixed side. It can be brought into contact with the mold 34 and the movable mold plate 33 with high accuracy. In addition, by forming the tapered convex portions 26a and 26f of the positioning member 26 integrally, the number of attachment points can be reduced compared to the case where the tapered convex portions 26a and 26f are separate bodies. It can be mounted on the mold plate in a short time.

  Further, when the tapered convex portions 26a and 26f are separate bodies, it is necessary to manually adjust the mounting accuracy such as the relative squareness when the tapered convex portions 26a and 26f are mounted. In some cases, it is difficult to improve the mounting accuracy, but by forming the tapered convex portions 26a and 26f integrally, the dimensional accuracy such as the perpendicularity of the tapered convex portions 26a and 26f is obtained by integral processing. Since high accuracy is possible, it is effective for improving the positioning accuracy of the mold.

2,32 Fixed mold platen 3,33 Movable mold platen 4,34 Fixed side mold 5,35 Movable side mold 10 Injection molding machine 15 Positioning member 26 Positioning member 27 Conical taper convex member 28 Conical taper concave member 30 Mold Reversing Type Two-Material Injection Molding Machine 36A Reversing Mold A
36B Reversing mold B
39 Inverted type board

Claims (4)

A plurality of molds facing each other that can be opened / closed relatively by attaching a mold, and a plurality of molds facing each other are attached to each other, and are brought into contact with each other by a closing operation of the plurality of molds facing each other. , Provided in the lower part of one or both of a mold that forms a cavity inside, a tapered concave part provided on the lower end surface of the mold, and a mold that can be opened and closed relatively by attaching the mold, A horizontal surface for receiving the weight of the mold to be hung and at the same time positioning in the vertical direction, fitted to the tapered surface of the tapered concave portion of the mold, and positioned in the horizontal direction one of the tapered shaped convex-shaped portion, Ri Do from the positioning member having a resilient portion of the one formed integral with said one tapered convex portion,
The elastic portion is a plate-like portion between a hole formed on the lower side of the tapered convex portion and an upper surface provided with the tapered convex portion, and the taper convex portion is provided with the mold. When the tapered concave portion is fitted and the tapered convex portion is pushed down, the plate-like portion is deformed downward until the bottom surface of the die comes into contact with the upper die supporting surface of the positioning device. A mold mounting member characterized by the above. A plurality of molds facing each other that can be opened / closed relatively by attaching a mold, and a plurality of molds facing each other are attached to each other, and are brought into contact with each other by a closing operation of the plurality of molds facing each other. A taper having a taper-like concave shape provided on a mold mounting surface of one of the plurality of mold plates facing each other or a plane parallel to the mold mounting surface; A concave convex portion and a tapered convex portion that is provided on the other mold surface opposite to the one mold plate provided with the tapered concave portion and is fitted to the tapered surface of the tapered concave portion. When, an elastic portion formed integral with the tapered convex portion,
The elastic part formed integrally with the tapered convex part is a plate-like part between a hole drilled below the tapered convex part and a surface provided with the tapered convex part, After the tapered convex portion is fitted into the tapered concave portion, the plate-like portion is deformed so that the tapered surface of the tapered convex portion and the tapered surface of the tapered concave portion are in contact with each other. A mold mounting member characterized in that a mold matching surface of the mold is brought into contact with the mold at the same time . The mold plate that can be opened and closed relatively is a fixed mold plate and a movable mold plate, and an inverted mold plate provided between the fixed mold plate and the movable mold plate and having a rotation axis in the vertical direction. The mold mounting member according to claim 1 or 2 , characterized in that A mold mounting method using the mold mounting member according to claim 3 , wherein after the positioning member fixing process for assembling the positioning members at positions symmetrical to the mold mounting surface of the reversal mold platen, The reversing mold is positioned by a positioning member, and is integrated with a fixed mold attached to the fixed mold board or a movable mold attached to the movable mold board on both mold mounting surfaces of the reversing mold board. A mold fixing process 1 is performed for assembling and fixing each of the reversing molds. After the mold fixing process 1, a fixed mold and a movable mold that are respectively integrated with the reversing mold are fixed mold platen. Alternatively, a mold mounting method characterized by performing a mold fixing process 2 for assembling and fixing each to a movable mold platen.

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