JP7443843B2 - Mold changing equipment and molding equipment - Google Patents

Description

The present invention relates to a mold changing device and a molding apparatus equipped with the mold changing device.

Conventionally, a cassette mold apparatus is known in which an exchangeable mold corresponding to the shape of a molded object is attached to a mother mold to perform molding. For example, Patent Document 1 discloses a holder body having a receiving surface with which one end of the mold comes into contact, and a holder body with the other end of the mold attached with the one end of the mold in contact with the receiving surface. A cassette mold device is disclosed that includes a mold holder having a spring biasing means for biasing one end of the mold toward the receiving surface.

Japanese Patent Application Publication No. 2011-178071

When molding material is injected into the molding space of a mold (cassette mold) during molding, pressure is generated in the mold due to the injection. If the mold cannot withstand this pressure, it will deform (expand) and it will not be possible to obtain a molded product of a predetermined shape, so measures are needed to prevent the mold from deforming (expanding).

In the conventional cassette mold device described above, the spring biasing means presses a pressing portion provided at a corner (the other end) of the mold, thereby pressing the mold against the receiving surface of the holder main body. However, this configuration is insufficient to cope with the above-mentioned pressure, and requires a configuration for the mold itself to withstand the pressure, which poses a problem of increasing the size of the mold.

One aspect of the present invention has been made in view of the above problems, and an object thereof is to provide a mold changing device and a molding device that can realize downsizing of molds.

In order to solve the above-mentioned problem, a mold changing device according to one aspect of the present invention includes a first mold and a second mold, and performs molding between the first mold and the second mold. an exchangeable mold in which the exchangeable mold is held, a mother mold that holds the replaceable mold, a pressing part that presses the first mold and the second mold against each other during molding, and the pressing part a fixing member that fixes the replaceable mold to the mother mold by pressing the side surfaces of the replaceable mold from two directions perpendicular to the pressing direction and perpendicular to each other. It is.

According to the above configuration, since the deformation of the replaceable mold is effectively suppressed by the fixing member, there is no need to provide the replaceable mold itself with a structure for suppressing deformation, and the size of the replaceable mold is reduced. can be realized.

Specifically, according to the above configuration, the first mold and the second mold are pressed in a direction perpendicular to the pressing direction (i.e. mold clamping/mold opening direction), and at least two directions perpendicular to each other. A fixing member is provided that presses against the side surface of the replaceable mold. This suppresses deformation (deformation due to pressure during injection) of the side surface of the replaceable mold that is pressed by the fixing member. In addition, since the fixing member presses the replaceable mold against the mother mold from at least two directions, deformation of the replaceable mold can be effectively suppressed by the mother mold.

In addition to the above-mentioned configuration, the mold exchange device according to one aspect of the present invention is such that the side surface of the replaceable mold has a first side surface that is perpendicular to one of the two directions; a second side surface that is perpendicular to the other direction; a first wedge-shaped member having a first matrix contact surface in contact with a first matrix surface provided on the matrix so as to face each other in an inclined manner; a first force application section that applies a force to move the first wedge-shaped member in a direction that reduces the distance between the first mold contact surface and the first mother mold contact surface; and a second force application section that is in contact with the second side surface. a second wedge shape, comprising a mold contact surface and a second mother mold contact surface that is in contact with a second mother mold surface provided on the mother mold so as to face and be inclined at a predetermined angle with respect to the second side surface; member, and a force that moves the second wedge-shaped member in the longitudinal direction of the second wedge-shaped member in a direction in which the distance between the second mold contact surface and the second mother mold contact surface becomes smaller. A second force applying section for applying force may be provided.

According to the above configuration, by moving the first wedge-shaped member in a direction in which the distance between the first mold contact surface and the first mother mold contact surface becomes smaller, the first mold contact surface uniformly becomes the first mold contact surface. 1. Can press against metal surfaces. Furthermore, by moving the second wedge-shaped member in a direction that reduces the distance between the second mold contact surface and the second master mold contact surface, the second mold contact surface uniformly presses the second metal surface. be able to. By using such a first wedge-shaped member and a second wedge-shaped member, the side surface of the replaceable mold can be pressed from the two directions. Therefore, for example, compared to a mode in which the first mold contact surface and the second mold contact surface are pushed out in a direction perpendicular to these surfaces and the first side surface and the second side surface are pressed, The fixing member can be downsized.

In addition to the above-mentioned configuration, the mold changing device according to one aspect of the present invention is such that the first force applying portion is an end portion in the longitudinal direction of the first wedge-shaped member, and the first force applying portion is connected to the first mold contact surface. The first wedge-shaped member is pressed from the side of the end that has a longer distance from the first matrix contact surface, and the second force application section is an end in the longitudinal direction of the second wedge-shaped member. , the second wedge-shaped member is pressed from the side of the end where the distance between the second mold contact surface and the second mother mold contact surface is longer, and the first force application section and the second force application section are pressed. The force may be applied by at least one of a spring compression force, air pressure, hydraulic pressure, screw tightening force, a cam mechanism, and a motor.

According to the above configuration, the first wedge-shaped member and the second wedge-shaped member are pressed as described above using at least one of the spring compression force, air pressure, oil pressure, screw tightening force, cam mechanism, and motor. For example, the first wedge-shaped member and the second wedge-shaped member can press against the side surface of the replaceable mold.

In addition to the above-mentioned configuration, the mold changing device according to one aspect of the present invention is such that the first force applying portion is an end portion in the longitudinal direction of the first wedge-shaped member, and the first force applying portion is connected to the first mold contact surface. The first wedge-shaped member is pulled from the side of the end that is shorter in distance from the first matrix contact surface, and the second force applying part is the longitudinal end of the second wedge-shaped member, Pulling the second wedge-shaped member from the side of the end where the distance between the second mold contact surface and the second mother mold contact surface is shorter, the first force applying section and the second force applying section, The force may be applied by at least one of a spring compression force, air pressure, hydraulic pressure, screw tightening force, a cam mechanism, and a motor.

According to the above configuration, if the first wedge-shaped member and the second wedge-shaped member are pulled as described above using at least one of the spring compression force, air pressure, hydraulic pressure, screw tightening force, cam mechanism, and motor, , the first wedge-shaped member and the second wedge-shaped member can press against the side surface of the replaceable mold.

It is preferable that the molding apparatus according to one aspect of the present invention includes the mold changing device.

According to one aspect of the present invention, there is an effect that the size of the mold can be reduced.

FIG. 1 is an exploded perspective view of the mold changing device according to the present embodiment. FIG. 1 is a block diagram showing the configuration of a molding apparatus according to the present embodiment. FIG. 3 is a perspective view of an exchangeable mold. It is a left side view showing an exchangeable mold in a state where a first mold and a second mold are connected. It is a left side view showing an exchangeable mold in a state where a first mold and a second mold are separated. It is a top view of a lock pin. FIG. 3 is a perspective view showing a state in which replaceable molds are housed in a first mother mold and an intermediate mother mold. It is a perspective view which shows the state when the exchangeable metal mold|die is inserted into the recessed part of the 1st mother mold. It is a front view which shows the state (unlocked state) when the exchangeable metal mold|die is inserted into the recessed part of the 1st mother mold. It is a front view which shows the state (locked state) when the exchangeable mold is inserted into the recessed part of the 1st mother mold.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment (hereinafter also referred to as "this embodiment") according to one aspect of the present invention will be described below based on the drawings.

§1 Application example <Configuration of mold changing device>
FIG. 1 is an exploded perspective view of a mold changing device 1 according to this embodiment. FIG. 2 is a block diagram showing the configuration of the molding apparatus 100 according to this embodiment. The molding apparatus 100 is a molding apparatus for performing injection molding of resin. As shown in FIGS. 1 and 2, the molding apparatus 100 includes a mold changing device 1, a displacement drive section 40, a first mother mold side switching mechanism 60, a second mother mold side switching mechanism 70, and a link 80. and a control section 90. The mold exchange device 1 also includes an exchangeable mold 10, a first matrix 20 (matrix), a second matrix 30 (pressing part), and an intermediate matrix 50 (matrix). .

Furthermore, the mold changing device 1 includes a fixing member 2 that presses the side surface of the replaceable mold 10 from two directions perpendicular to each other. Below, first, the overall configuration other than the fixing member 2 will be explained, and then the fixing member will be explained in detail. In addition, although this embodiment describes a form in which the intermediate matrix 50 is provided between the first matrix 20 and the second matrix 30, the structure is not limited to such a structure, and the intermediate matrix 50 may be present. It is also possible to adopt a form that is not

In the mold changing device 1, the shape of the molded product can be easily changed by replacing the replaceable mold 10 with respect to the first mother mold 20, the second mother mold 30, and the intermediate mother mold 50. . In the following description, the vertical direction in FIG. 1 will be simply referred to as the vertical direction. Furthermore, the direction of the second matrix 30 with respect to the first matrix 20 is referred to as the front side, and the direction of the first matrix 20 with the second matrix 30 as a reference is referred to as the rear side. Further, the right side and the left side when viewed from the front side to the rear side are simply referred to as the right side and the left side, respectively.

FIG. 3 is a perspective view of the replaceable mold 10. Further, FIG. 4 is a left side view showing the replaceable mold 10 in a state where the first mold 11 and the second mold 12 are connected, and FIG. 5 is a left side view showing the first mold 11 and the second mold 12. FIG. 2 is a left side view showing the replaceable mold 10 in a state where the mold 12 is separated.

As shown in FIGS. 3 to 5, the replaceable mold 10 includes a first mold 11, a second mold 12, and a lock pin 13. The first mold 11 and the second mold 12 are separable in the front-rear direction. The molding process is performed between the first mold 11 and the second mold 12. The surfaces of the first mold 11 and the second mold 12 that face each other have a shape corresponding to the shape of the target molded product, and there is a gap between the first mold 11 and the second mold 12. A molding space is formed. During the molding operation, the position of the second mold 12 is fixed, and the first mold 11 moves relative to the second mold 12. That is, the first mold 11 is a movable mold (core), and the second mold 12 is a fixed mold (cavity).

The first mold 11 includes a front portion 111 having a substantially rectangular parallelepiped outer shape, and a rear portion 112 including a plurality of plate members and a plurality of pins. The front part 111 has the same length in the vertical direction as the rear part 112, and is longer in the horizontal direction than the rear part 112. A through hole (not shown) into which the lock pin 13 is inserted is formed in the first mold 11 so as to extend in the front-rear direction.

The second mold 12 has an approximately rectangular parallelepiped outer shape. The length of the second mold 12 in the up-down direction and in the left-right direction is the same as that of the front portion 111 of the first mold 11, respectively. A mold channel 121 is formed in the second mold 12 to allow the molten resin to flow into the molding space between the first mold 11 and the second mold 12. Further, a hole (not shown) in which the rear end of the lock pin 13 is housed is formed in the second mold 12 so as to extend in the front-rear direction and open toward the front. .

The lock pin 13 switches between a state in which the first mold 11 and the second mold 12 are connected and a state in which they are not connected. One lock pin 13 is attached to the upper and lower parts of the first mold 11 and the second mold 12, respectively.

FIG. 6 is a top view of the lock pin 13. As shown in FIG. 6, the lock pin 13 includes a T-shaped pin body 131, a button 132, and a ball 133. In the following description, the structure of the lock pin 13 will be explained using the arrangement shown in FIGS. 3 to 6 for convenience, but the lock pin 13 can rotate about the pin body 131 as a rotation axis.

One button 132 is provided in the front portion of the pin body 131, and two balls 133 are provided on the left and right sides in the rear portion of the pin body 131. The ball 133 normally protrudes from the pin body 131 to both sides in the left and right direction, but is housed inside the pin body 131 when the button 132 is pressed.

When the first mold 11 and the second mold 12 are brought into a connected state (as shown in FIG. 4), first, the first mold 11 and the second mold 12 are brought into contact with each other, and the button of the lock pin 13 is pressed. 132, insert the lock pin 13 into the first mold 11 and the second mold 12. In this state, by releasing the button 132, the ball 133 is made to protrude in the left-right direction, and the first mold 11 and the second mold 12 can be switched to a connected state.

In addition, when the first mold 11 and the second mold 12 are to be in a state where the connection is released (as shown in FIG. 5), the lock pin 13 is moved between the first mold It is extracted from the mold 11 and the second mold 12. Thereby, it is possible to switch to a state where the first mold 11 and the second mold 12 are not connected.

Note that the mechanism for switching between the connected state and the unconnected state of the first mold 11 and the second mold 12 is not limited to the lock pin 13. For example, an electromagnet or a bolt may be used instead of the lock pin 13, or a lock pin having a different shape from the example shown in FIG. 6, for example, a lock pin using a pole instead of a ball, may be used.

As shown in FIG. 1, the first mother mold 20 presses the first mold 11 toward the second mold 12. As shown in FIG. The first mother die 20 has an approximately rectangular parallelepiped outer shape. A recess 21 for accommodating the first mold 11 is formed on the front surface of the first mother mold 20 . The length of the recess 21 in the front-rear direction is equivalent to the length of the first mold 11 in the front-rear direction. Further, first guide holes 22 for guiding four guide pins 32, which will be described later, are formed as holes extending in the front-rear direction near the four corners of the front surface of the first mother mold 20.

The second mother mold 30 presses the second mold 12 toward the first mold 11 . The second mother die 30 has an approximately rectangular plate shape in outer shape. The second matrix 30 has the same length in the vertical direction and the length in the horizontal direction as the first matrix 20. The second mother mold 30 is formed with a mother mold flow path (flow path) 31 through which molten resin flows into the molding space between the first mold 11 and the second mold 12.

Four guide pins 32 are provided in the vicinity of the four corners of the rear surface of the second mother die 30, each projecting rearward. Furthermore, on the rear surface of the second mother mold 30, four displacement regulating pins 33 are provided which respectively protrude to the rear side, closer to the center than the guide pins 32. The displacement regulating pin 33 includes a rod-shaped portion 331 and an engaging portion 332.

The rod-shaped portion 331 and the engaging portion 332 have a substantially cylindrical shape extending in the front-rear direction, and the engaging portion 332 is provided at a portion of the rod-shaped portion 331 on the rear end side. The diameter of the engaging portion 332 is larger than the diameter of the rod-shaped portion 331. Further, the length of the rod-shaped portion 331 in the front-rear direction is longer than the length of the engaging portion 332 in the front-rear direction. The displacement regulating pin 33 reduces the distance between the second matrix 30 and the intermediate matrix 50 by engaging the engaging portion 332 with an edge forming a displacement regulating hole 55 of the intermediate matrix 50, which will be described later. is configured to be regulated within a predetermined range.

The displacement drive unit 40 (shown in FIG. 2) moves the first mother die 20 in the front-back direction. At this time, the position of the second matrix 30 is fixed. Therefore, the first matrix 20 is a movable matrix, and the second matrix 30 is a stationary matrix. In other words, the displacement drive unit 40 changes the relative positions of the first mother mold 20 and the second mother mold 30. Here, since the mother mold flow path 31 is formed in the second mother mold 30 which is the stationary side mother mold, the molten resin flows from the mother mold flow path 31 to the first mold 11 and the second mold 12. It can stably flow into the molding space between.

The intermediate matrix 50 is disposed movably between the first matrix 20 and the second matrix 30. The intermediate master die 50 has a substantially rectangular plate shape. The intermediate mold 50 has the same length in the vertical direction and the length in the horizontal direction as the first mold 20, and the length in the front-back direction is equivalent to the second mold 12.

A through hole 51 is formed in the intermediate matrix 50 and extends from the first matrix 20 side to the second matrix 30 side. The through hole 51 is formed at a position corresponding to the formation position of the recess 21 in the first mother mold 20. The through hole 51 can accommodate the second mold 12. In other words, the through hole 51 can accommodate at least a portion of the replaceable mold 10.

Further, the intermediate master mold 50 includes a guide mounting portion 52 on the front surface. A guide stand 53 (see FIG. 7) that guides the replaceable mold 10 to the through hole 51 can be attached to the guide attachment part 52.

Further, in the intermediate matrix 50, an intermediate guide hole 54 into which the guide pin 32 is inserted and a displacement restriction hole 55 into which the displacement restriction pin 33 is inserted are formed as through holes penetrating in the front-rear direction. The displacement regulating hole 55 has a circular edge when viewed from the front. The displacement regulating hole 55 is configured to have a diameter larger than the diameter of the rod-shaped portion 331 of the displacement regulating pin 33 and smaller than the diameter of the engaging portion 332.

The first matrix side switching mechanism 60 switches between a state in which the first matrix 20 and the intermediate matrix 50 are connected and a state in which they are not connected. The first mother mold side switching mechanism 60 includes an air pipe section (not shown) and a ball (not shown). The air pipe section is connected to the air flow path. The ball projects from the air tube section radially outward from the air tube section when air is being supplied to the air tube section, and is housed in the air tube section when air is not being supplied to the air tube section. According to the first mother mold side switching mechanism 60, there is no need to provide a complicated mechanical structure, and the first mother mold 20 and the intermediate mother mold 50 can be switched between a connected state and an unconnected state by air control. Can be switched.

Note that the mechanism for switching between the connected state and the unconnected state of the first mother mold 20 and the intermediate mother mold 50 is not limited to the first mother mold side switching mechanism 60. For example, an electromagnet may be used instead of the first mother mold side switching mechanism 60, or a bolt and a plate may be used for switching like a second mother mold side switching mechanism 70 described later.

The second matrix side switching mechanism 70 switches between a state in which the second matrix 30 and the intermediate matrix 50 are connected and a state in which they are not connected. The second mother die side switching mechanism 70 includes a switching bolt 71 and a switching plate. The switching bolt 71 is fixed to the front surface of the intermediate mother mold 50, and the switching plate is fixed to the rear surface of the second mother mold 30. The switching bolts 71 are provided at four locations near the four corners of the intermediate matrix 50 so as to project forward. The switching plates are provided at four locations near the four corners of the second mother mold 30, facing the switching bolts 71 at the rear.

As shown in FIG. 2, the displacement drive unit 40, the first matrix side switching mechanism 60, and the second matrix side switching mechanism 70 are connected to the control unit 90. The control unit 90 controls the operations of the displacement drive unit 40, the first matrix side switching mechanism 60, and the second matrix side switching mechanism 70, for example, according to instructions from an operator or a fully automatic molding system (not shown). I can do it.

FIG. 7 is a perspective view showing a state in which the replaceable mold 10 is housed in the first mother mold 20 and the intermediate mother mold 50. As shown in FIG. 7, a guide stand 53 can be attached to the intermediate master mold 50. As shown in FIG. Further, in a state where the intermediate mother mold 50 is in contact with the first mother mold 20 and the replaceable mold 10 is inserted into the through hole 51 of the intermediate mother mold 50, the front surface of the intermediate mother mold 50 (the second mother mold 30 The mold changing device 1 is configured such that the front surface of the replaceable mold 10 (the surface facing the second mother mold 30) is located on the same plane.

The link 80 regulates the distance between the first matrix 20 and the intermediate matrix 50. There are four links 80 in total, one on each side in the left and right direction at the top of the first mother mold 20 and the intermediate mother mold 50, and one on each side in the left and right direction at the bottom of the first mother mold 20 and the intermediate mother mold 50. It is provided. Each link 80 includes a first bolt 81, an intermediate bolt 82, and a link plate 83. The first bolt 81 and the intermediate bolt 82 may have the same size and shape, or may have different sizes and shapes.

The link plate 83 has a substantially rectangular plate shape extending in the front-rear direction. A first bolt hole 811 into which the first bolt 81 is inserted and an intermediate bolt hole 812 into which the intermediate bolt 82 is inserted are formed in the link plate 83 as through holes that penetrate in the vertical direction.

The first bolt hole 811 is formed so that the length in the front-rear direction is longer than the length in the left-right direction, and the length in the left-right direction is the same as that of the shaft portion (not shown) of the first bolt 81. It is formed to be equal to or larger than the diameter. Therefore, the first bolt 81 is movable relative to the link plate 83 in the front-rear direction while being inserted into the first bolt hole 811.

The intermediate bolt hole 812 is formed so that the length in the front-rear direction is longer than the length in the left-right direction, and the length in the left-right direction is equal to the diameter of the shaft portion (not shown) of the intermediate bolt 82. It is designed to be the same or better. Furthermore, the intermediate bolt hole 812 is formed so that its length in the front-rear direction is shorter than the length of the first bolt hole 811 in the front-rear direction. Therefore, the intermediate bolt 82 can be moved relative to the link plate 83 by a relatively short distance in the front-rear direction while being inserted into the intermediate bolt hole 812.

By fixing the intermediate bolts 82 inserted through the intermediate bolt holes 812 to the intermediate mother mold 50 and fixing the first bolts 81 inserted through the first bolt holes 811 to the first mother mold 20, the first mother mold 20 can be regulated to a predetermined distance D1 or less. Therefore, when the first mother mold 20 moves to the rear side, the intermediate mother mold 50 can be moved to the rear side. In other words, the link 80 can separate the intermediate matrix 50 and the second matrix 30.

Further, as shown in FIG. 7, when the replaceable mold 10 is held by the first mother mold 20 and the intermediate mother mold 50, the above-mentioned fixing member 2 is attached to the side surfaces of the replaceable mold 10 in two directions perpendicular to each other. Press from two directions (only one of the two directions is shown in FIG. 7). Note that although a mode in which the fixing member 2 presses from two directions will be described below, one mode of the present invention is not limited to this. For example, the fixing member may be pressed from three directions (at least two of which are orthogonal to each other). Alternatively, the fixing member may be pressed from four directions (at least two of which are orthogonal to each other).

Thereby, the replaceable mold 10 is fixed to the first mother mold 20 and the intermediate mother mold 50. The fixing member 2 will be explained below. The fixing member 2 is provided on the first mother mold 20 and the intermediate mother mold 50, respectively. Note that the configuration and fixing mechanism of the fixing member 2 are common to the fixing member 2 provided on the first matrix 20 and the fixing member 2 provided on the intermediate matrix 50. Therefore, the configuration and fixing mechanism will be described below based on the fixing member 2 provided on the first matrix 20.

§2 Configuration Example FIG. 8 is a perspective view of the first mother mold 20 in a state where the first mold 11 of the replaceable mold 10 is inserted into the recess 21 of the first mother mold 20. As shown in FIG. Further, FIG. 9 is a plan view showing a state in which the fixing member 2 provided on the first mother mold 20 presses the first mold 11 inserted into the recess 21 and fixes it to the first mother mold 20. It is. Further, FIG. 10 is a plan view showing a state in which the fixing member 2 provided on the first mother mold 20 is not pressing the first mold 11 inserted into the recess 21, that is, is not fixing it. Note that the state in which the fixing member 2 fixes (locks) the first mold 11 may be simply referred to below as a locked state, and the state in which it is not fixed may simply be referred to as an unlocked state.

The fixing member 2 presses the side surface of the replaceable mold 10 from two mutually orthogonal directions, which are perpendicular to the pressing direction by the second mother mold 30, so that the first mold 11 is fixed to the first mother mold 11. It is fixed to the mold 20. Note that the second mold 12 is connected to the first mold 11 fixed to the first mother mold 20 as described above. Therefore, it can also be said that the fixing member 2 provided on the first mother mold 20 fixes the replaceable mold 10 in the first mold 11.

As shown in FIG. 9, the fixing member 2 includes a first fixing member 2a and a second fixing member 2b. The first fixing member 2a has a mechanism that presses downwardly the first side surface 11a facing upward, which is one of the four sides (surfaces facing upward, downward, leftward, and rightward) of the first mold 11. have The second fixing member 2b has a mechanism that presses the right-facing second side surface 11b of the first mold 11 toward the left. The first mold 11 with the first side surface 11a pressed downward and the second side surface 11b pressed leftward is pressed against the lower inner surface and the left inner surface of the recess 21 and is fixed.

The first fixing member 2a includes a first wedge-shaped member 26a and a first force applying section 25a. The first force applying section 25a includes a first connecting shaft 23a, a first lever 28a, and a first spring 29a. The second fixing member 2b includes a second wedge-shaped member 26b and a second force applying section 25b. The second force applying section 25b includes a second connecting shaft 23b, a second lever 28b, and a second spring 29b. Each configuration will be explained below.

The first wedge-shaped member 26a has a first mold contact surface 261a that is in contact with the first side surface 11a of the first mold 11, and a first mother mold that faces the first mold contact surface 261a and is inclined at a predetermined angle with respect to the first side surface 11a. 20, and a first matrix contact surface 262a that is in contact with the first matrix surface 27a provided on the base plate 20. That is, the first mold contact surface 261a is a surface facing downward. The distance between the first mold contact surface 261a and the first mother mold contact surface 262a is the smallest at the right end. That is, the first wedge-shaped member 26a has a wedge-shaped structure that tapers toward the right. The first wedge-shaped member 26a has a first connection having an axial direction in the left-right direction at the end (left end) where the distance between the first mold contact surface 261a and the first mother mold contact surface 262a is longer. A shaft 23a is connected.

The first force applying section 25a is arranged in the longitudinal direction of the first wedge-shaped member 26a in the direction in which the distance between the first mold contact surface 261a and the first mother mold contact surface 262a becomes smaller (rightward direction). A force is applied to move the wedge-shaped member 26a. Specifically, a first lever 28a provided on the left side surface of the first mother die 20 is connected to a first wedge-shaped member 26a via a first connection shaft 23a. The first lever 28a can switch the posture between the posture shown in FIG. 9 and the posture shown in FIG. (left and right). Switching can be performed by a worker, but is not limited to this.

To further explain the first lever 28a, the first lever 28a has an eccentric structure and can move the first connecting shaft 23a in the left-right direction by changing its posture. When the first lever 28a is in the posture shown in FIG. 9, the center of the first lever 28a is located to the right. On the other hand, when the first lever 28a is in the posture shown in FIG. 10, the center of the first lever 28a is located to the left. Here, when the first lever 28a changes from the posture shown in FIG. 10 to the posture shown in FIG. 9, the center of the first lever 28a moves to the right, and the first connecting shaft 23a moves to the right accordingly. Then, the first wedge-shaped member 26a is pressed to the right, and the first mold contact surface 261a of the first wedge-shaped member 26a slides to the right with respect to the first side surface 11a. Also, along with this, the first matrix contact surface 262a slides in the right direction with respect to the first matrix surface 27a, but since these surfaces are inclined as described above, as a result, the first matrix contact surface 262a slides in the right direction with respect to the first matrix surface 27a. 1. The wedge-shaped member 26a moves in the lower right direction. If this is seen in the entire recess 21, the first wedge-shaped member 26a presses the first side surface 11a of the first mold 11 downward.

To explain the first force applying section 25a in more detail, a first spring 29a is disposed on the first wedge-shaped member 26a side of the first connecting shaft 23a. The first spring 29a always biases the first wedge-shaped member 26a rightward. Specifically, the first spring 29a can be expanded and contracted in the left-right direction, and its left end is in contact with the first mother mold 20, and its right end is in contact with the left end of the first wedge-shaped member 26a. A first connecting shaft 23a is provided to pass through the first spring 29a, and the right end of the first connecting shaft 23a is connected to the first wedge-shaped member 26a. The first connecting shaft 23a holds the first wedge-shaped member 26a to the left in the unlocked state shown in FIG. It is arranged in a compressed state between. On the other hand, in the locked state shown in FIG. 9, the posture of the first lever 28a changes, so that the first connecting shaft 23a extends at the right end, releasing the compression of the first spring 29a. As a result, the first wedge-shaped member 26a is pressed rightward by the restoring force of the first spring 29a.

Although the configuration of the first force applying section 25a has been described above, the present invention is not limited thereto. Any configuration is sufficient as long as it can apply a force that moves the first wedge-shaped member 26a to the right as described above, such as spring compression force, air pressure, oil pressure, screw tightening force, cam mechanism (for example, in conjunction with lever operation). The force may be applied by at least one of a motor and a motor.

The second wedge-shaped member 26b has a second mold contact surface 261b in contact with the second side surface 11b of the first mold 11, and a first mother mold so as to face the second mold contact surface 261b at a predetermined angle with respect to the second side surface 11b. 20, and a second matrix contact surface 262b that is in contact with the second matrix surface 27b provided on the base plate 20. That is, the second mold contact surface 261b is a surface facing left. The distance between the second mold contact surface 261b and the second mother mold contact surface 262b is the smallest at the upper end. That is, the second wedge-shaped member 26b has a wedge-shaped structure that is tapered upward. The second wedge-shaped member 26b has a second wedge having an axial direction in the vertical direction at the end (lower end) on the side where the distance between the second mold contact surface 261b and the second mother mold contact surface 262b is longer. A connecting shaft 23b connects them.

The second force applying section 25b is arranged in the longitudinal direction of the second wedge-shaped member 26b in the direction (upward) in which the distance between the second mold contact surface 261b and the second mother mold contact surface 262b becomes smaller (upward). A force is applied to move the wedge-shaped member 26b. Specifically, the second lever 28b provided on the lower surface of the first mother die 20 is connected to the second wedge-shaped member 26b via the second connection shaft 23b. The second lever 28b can switch the posture between the posture shown in FIG. 9 and the posture shown in FIG. It can be moved vertically). Switching can be performed by a worker, but is not limited to this.

To further explain the second lever 28b, the second lever 28b has an eccentric structure and can move the second connecting shaft 23b in the vertical direction by changing its posture. When the second lever 28b is in the posture shown in FIG. 9, the center of the second lever 28b is located upward. On the other hand, when the second lever 28b is in the posture shown in FIG. 10, the center of the second lever 28b is located toward the bottom. Here, when the second lever 28b changes from the posture shown in FIG. 10 to the posture shown in FIG. 9, the center of the second lever 28b moves upward, and the second connecting shaft 23b moves upward accordingly. Then, the second wedge-shaped member 26b is pressed upward, and the second mold contact surface 261b of the second wedge-shaped member 26b slides upward with respect to the second side surface 11b. Further, along with this, the second matrix contact surface 262b slides upward with respect to the second matrix surface 27b, but since these surfaces are inclined as described above, as a result, the second matrix contact surface 262b slides upward with respect to the second matrix surface 27b. The second wedge-shaped member 26b moves toward the upper left. If this is seen in the entire recess 21, the second wedge-shaped member 26b presses the second side surface 11b of the first mold 11 to the left.

To explain the second force applying section 25b in more detail, a second spring 29b is disposed on the second wedge-shaped member 26b side of the second connecting shaft 23b. The second spring 29b always urges the second wedge-shaped member 26b upward. Specifically, the second spring 29b is expandable and retractable in the vertical direction, has a lower end in contact with the first mother mold 20, and an upper end in contact with the lower end of the second wedge-shaped member 26b. A second connecting shaft 23b is provided to pass through the second spring 29b, and the right end of the second connecting shaft 23b is connected to the second wedge-shaped member 26b. The second connecting shaft 23b holds the second wedge-shaped member 26b downward in the unlocked state shown in FIG. It is placed in a compressed state between the On the other hand, in the locked state shown in FIG. 9, the posture of the second lever 28b changes, so that the second connecting shaft 23b extends at its upper end, releasing the compression of the second spring 29b. As a result, the second wedge-shaped member 26b is pressed upward by the restoring force of the second spring 29b.

Although the configuration of the second force applying section 25b has been described above, the present invention is not limited thereto. Any configuration that can apply a force to move the second wedge-shaped member 26b upward as described above may be used, such as spring compression force, air pressure, oil pressure, screw tightening force, cam mechanism (for example, in conjunction with lever operation). The force may be applied by at least one of a motor and a motor. According to the above configuration, the first wedge-shaped member 26a and the second wedge-shaped member 26b can be pressed with a simple structure.

As described above, according to the present embodiment, deformation (deformation due to pressure during injection) of the first side surface 11a and the second side surface 11b of the replaceable mold 10, which directly receive the pressure of the fixing member 2, is suppressed. In addition, since the fixing member 2 presses the replaceable mold 10 against the first mother mold 20 from two directions, the deformation of the replaceable mold 10 is effectively suppressed by the first mother mold 20. be able to. That is, since deformation of the replaceable mold 10 is effectively suppressed by the fixing member 2, there is no need to provide the replaceable mold 10 itself with a structure for suppressing deformation. Thereby, the size of the replaceable mold 10 can be reduced.

Further, due to the wedge-shaped structure of the first wedge-shaped member 26a, a large uniform force can be applied to the first side surface 11a of the replaceable mold 10 with a small force applied by the first force applying section 25a. Similarly, due to the wedge-shaped structure of the second wedge-shaped member 26b, a large and uniform force can be applied to the second side surface 11b of the replaceable mold 10 with a small force applied by the second force applying section 25b. The present invention does not have a wedge-shaped structure, but has, for example, a vice structure in which the first mold contact surface 261a and the first mother mold contact surface 262a are parallel, and the first mold contact surface 262a is pressed downward. The structure may include a force applying section. However, in the case of such a vise structure, the pressing force at the location where the clamping force is applied is greater than at other locations, making it difficult to achieve uniform pressing. In order to achieve uniform pressing, it is necessary to make the structure that contacts the first side surface 11a thicker in the vertical direction. Therefore, the mother mold becomes larger. On the other hand, in the case of a mode having a wedge-shaped structure as in this embodiment, by employing the wedge-shaped structure, it is possible to realize a mechanism that is compact and can press uniformly.

As an example, assuming the configuration of the first fixing member 2a and assuming that the spring force of the first spring 29a is F, the angle of the wedge (the angle formed by the first mold contact surface 261a and the first mother mold contact surface 262a) ) is 1.5°, the holding force (the force with which the first wedge-shaped member 26a presses the first side surface 11a of the first mold 11 downward) is approximately 20 times F. With such a holding force, it is possible to exhibit mold fixing performance equivalent to that of a type in which the mold is press-fitted into the mother mold and fixed.

Here, in this embodiment, the first fixing member 2a presses the side surface of the first mold 11 downward, and the second fixing member 2b presses the side surface of the first mold 11 leftward. As long as the directions are perpendicular to each other, the direction in which the two fixing members are pressed is not limited. As described above, in addition to this embodiment, one aspect of the present invention includes a third fixing member that presses the side surface of the first mold 11 upward and a third fixing member that presses the side surface of the first mold 11 rightward. The fourth fixing member may include at least one of the fourth fixing members.

In this embodiment, the first force applying section 25a is located on the left side of the first wedge-shaped member 26a, and applies a force that presses the first wedge-shaped member 26a to the right. However, one embodiment of the present invention is not limited thereto. If it is possible to apply a force that moves the first wedge-shaped member 26a to the right, the force applying section that is on the right side of the first wedge-shaped member 26a and that pulls (pulls) the first wedge-shaped member 26a to the right can be used to apply the first force. It may be connected to the right side of the first wedge-shaped member 26a instead of the portion 25a. Similarly, in this embodiment, the second force applying section 25b is located below the second wedge-shaped member 26b, and applies a force that presses the second wedge-shaped member 26b upward. However, one embodiment of the present invention is not limited thereto. If it is possible to apply a force that causes the second wedge-shaped member 26b to move upward, the force-applying portion that is located above the second wedge-shaped member 26b and that pulls (draws) the second wedge-shaped member 26b upward is applied with a second force. It may be connected to the upper side of the second wedge-shaped member 26b instead of the portion 25b.

Note that, as described above, the intermediate matrix 50 is also provided with the fixing member 2. The structure and mechanism are the same as those of the fixing member 2 of the first mother mold 20, and the first wedge-shaped member provided in the through hole 51 is the same as the second mold 12 accommodated in the through hole 51 of the intermediate mother mold 50. 26a and the second wedge-shaped member 26b have the same structure and press the second mold 12 downward and to the left to fix it. Note that in this embodiment, the fixing member 2 of the first mother die 20 and the fixing member 2 of the intermediate mother die 50 press against the same side surface of the replaceable mold 10, but the present invention is not limited to this aspect. For example, while the fixing member 2 of the first mother die 20 presses the upward and rightward side surfaces (first side surface 11a, second side surface 11b) of the replaceable mold 10 as shown in FIGS. 9 and 10, The fixing member 2 of the intermediate mold 50 may press the downward and leftward side surfaces of the replaceable mold 10.

In addition, in this embodiment, one replaceable mold 10 is accommodated for one first mother mold 20 and one intermediate mother mold 50. However, the present invention is not limited to this configuration, and a plurality of replaceable molds 10 may be accommodated in one first mother mold 20 and one intermediate mother mold 50. In this case, the fixing member 2 may press the replaceable mold 10 from two directions at each accommodation location.

Regarding the mode of accommodating a plurality of replaceable molds 10, for example, in at least one of the left region 20L and right region 20R of the recess 21 in the first mother mold 20 shown in FIGS. 1 and 8 to 10, a separate A space may be provided to accommodate a replaceable mold. For example, if another replaceable mold is accommodated in the space of the region 20L on the left side of the recess 21, an opening communicating with the space is provided on the left side of the first mother mold 20, and the opening communicates with the space. Another replaceable mold may be slid in and accommodated. The same applies to the right region 20R.

Furthermore, in this embodiment, the molding apparatus 100 is used for injection molding of resin. However, the present invention is not limited thereto, and the molding apparatus 100 may be used for press molding.

Note that one aspect of the present invention is not limited to the embodiment described above, and various changes can be made within the scope of the claims.

1 Mold exchange device 2 Fixing member 2a First fixing member 2b Second fixing member 10 Exchangeable mold 11 First mold 11a First side surface 11b Second side surface 12 Second mold 13 Lock pin 20 First mother mold 21 Recessed portion 23a First connection shaft (first force application section)
23b Second connection shaft (second force application part)
25a First force application section 25b Second force application section 26a First wedge-shaped member 26b Second wedge-shaped member 27a First matrix surface 27b Second matrix surface 28a First lever (first force application section)
28b Second lever (second force application section)
29a First spring (first force application part)
29b Second spring (second force application part)
30 Second matrix (pressing part)
50 Intermediate matrix (matrix)
100 Molding device 261a First mold contact surface 261b Second mold contact surface 262a First mold contact surface 262b Second mold contact surface

Claims (2)

an exchangeable mold comprising a first mold and a second mold, in which molding is performed between the first mold and the second mold;
a mother mold that holds the replaceable mold;
a pressing part that presses the first mold and the second mold so that they are pressed against each other during molding;
a fixing member that fixes the replaceable mold to the mother mold by pressing side surfaces of the replaceable mold from at least two directions perpendicular to the pressing direction by the pressing unit and perpendicular to each other; ,
Equipped with
The side surface of the replaceable mold has a first side surface that is perpendicular to one of the two directions, and a second side surface that is perpendicular to the other direction. ,
The fixing member is
a first mold contact surface in contact with the first side surface; and a first mother mold in contact with a first mold surface provided on the mother mold so as to face and be inclined at a predetermined angle with respect to the first side surface. a first wedge-shaped member comprising a contact surface; and
A first step that applies a force to move the first wedge-shaped member in the longitudinal direction of the first wedge-shaped member in a direction in which the distance between the first mold contact surface and the first mother mold contact surface becomes smaller. a force applying section;
a second mold contact surface in contact with the second side surface; and a second mother mold in contact with a second mold surface provided on the mother mold so as to face and be inclined at a predetermined angle with respect to the second side surface. a second wedge-shaped member comprising a contact surface; and
A second step that applies a force to move the second wedge-shaped member in the longitudinal direction of the second wedge-shaped member in a direction in which the distance between the second mold contact surface and the second mother mold contact surface becomes smaller. a force applying section;
Equipped with
The first force applying section is located at an end in the longitudinal direction of the first wedge-shaped member, and is applied from the side of the end where the distance between the first mold contact surface and the first mother mold contact surface is shorter. pulling the first wedge-shaped member;
The second force applying section is located at an end in the longitudinal direction of the second wedge-shaped member, and is applied from the side of the end where the distance between the second mold contact surface and the second mother mold contact surface is shorter. pulling the second wedge-shaped member;
The first force applying section and the second force applying section apply the force using at least one of spring compression force, air pressure, hydraulic pressure, screw tightening force, a cam mechanism, and a motor. . A molding device comprising the mold changing device according to claim 1 .

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