Molding device

Abstract

To provide a mold clamping device that can discharge molded products without impairing the function of the base, even in large injection molding machines. [Solution] The clamping device (1) is A fixed panel (11) and a movable panel (12) that can move forward and backward relative to the fixed panel (11), Multiple bases (10A, 10B) are arranged at intervals from each other, providing fixed support for the fixed platen (11) and slidable support for the movable platen (12), The system includes a recovery unit (20) that reciprocates between a fixed mold plate (11) and a movable mold plate (12) in the horizontal and vertical regions between multiple bases (10A, 10B) to collect the molded product (OP), The recovery unit (20) is The device reciprocates at a position lower than the area occupied by the fixed mold (13) supported by the fixed mold plate (11) and the movable mold (14) supported by the movable mold plate (12).

Description

Technical Field

[0001] The present invention relates to a mold clamping device used in an injection molding machine, a die casting machine, etc.

Background Art

[0002] An injection molding machine and a die casting machine are equipped with a mold clamping device for a pair of molds consisting of a fixed mold and a movable mold. The mold clamping device includes a fixed mold plate to which the fixed mold is attached and a movable mold plate to which the movable mold is attached. The movable mold plate is capable of moving forward and backward with respect to the fixed mold plate. After bringing the fixed mold and the movable mold into contact by moving the movable mold plate toward the fixed mold plate, a mold clamping force is applied between the fixed mold and the movable mold. In this state where the mold clamping force is applied, molten resin is injected in an injection molding machine, and molten metal is press-fitted in a die casting machine.

[0003] For example, there is an injection molding machine equipped with a conveyor for collecting and transporting molded products, molding results such as sprue runners, etc. obtained by injection molding. For example, the injection molding machine of Patent Document 1 is disposed below the injection molding machine, and includes a hopper for temporary storage having an openable and closable door, a conveyor disposed below the hopper and capable of switching the rotation direction between forward and reverse, containers for storing products and sprue runners transported by the conveyor, and a control unit for controlling the timing of opening and closing the door and switching the rotation direction of the conveyor in conjunction with the operation cycle of the injection molding machine.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The conveyor disclosed in Patent Document 1 is located below the mold clamping device and transports the molded product in a direction perpendicular to the longitudinal direction of the injection molding machine. This is because Patent Document 1 is intended for small injection molding machines. In order to facilitate the removal of molded products, small injection molding machines have a mold clamping device, which contains the mold section from which the molded product is removed, located at a height that is approximately opposite to the upper body of the operator. For this reason, the area below the mold clamping device is located at a height that is approximately opposite to the lower body of the operator. Therefore, there is a base on which a mold plate or the like is placed at a height corresponding to the height of the lower body of the operator, but there is a large space between the pair of frames that make up the base. In addition, a large opening can be provided in the frame of the base in the width direction perpendicular to the longitudinal direction of the injection molding machine. Since the conveyor described in Patent Document 1 is located in the large space below the mold clamping device, the conveying direction of the conveyor can be set toward the large opening in the base frame perpendicular to the longitudinal direction of the injection molding machine, for example, in the width direction from the front side to the back side of the injection molding machine.

[0006] However, in order to allow installation in low-rise factory buildings, the clamping devices of large injection molding machines have thin bases that support fixed mold plates from below, thus reducing the overall height of the clamping device. Therefore, if a conveyor is provided in the width direction as a means of transport, as in Patent Document 1, the conveyor will penetrate the base. In this case, not only is it impossible to ensure the rigidity of the base as it supports the huge and heavy clamping device, but it may also fail to perform its function of suppressing deflection as a base that supports the forward and backward movement load of the heavy movable mold plate. Therefore, the present invention aims to provide a mold clamping device that can discharge molded products without impairing the function of the base, even when using a large injection molding machine. [Means for solving the problem]

[0007] The clamping device of the present invention is A fixed panel and a movable panel that can move forward and backward relative to the fixed panel, Multiple bases are arranged at intervals from each other, providing fixed support for the fixed type plate and slidable support for the movable type plate. The system includes a recovery unit that reciprocates between a fixed mold plate and a movable mold plate in a horizontal and vertical region between multiple base plates to collect the molded product. The collection unit is, It reciprocates at a position lower than the area occupied by the fixed mold supported by the fixed mold plate and the movable mold supported by the movable mold plate.

[0008] It is preferable that the device is positioned lower than the support surfaces of the fixed and movable plates on multiple bases and includes a movable part that reciprocates the recovery unit.

[0009] The movable panel is It is movable between a mold-closed position, which is a position where the fixed mold supported by the fixed mold platen and the movable mold supported by the movable mold platen are in contact, and a mold-open position, which is a predetermined stopping position where the fixed mold and the movable mold are separated from the fixed mold platen. The collection unit is, It is preferable to collect the sprue runner, which is the molded product that falls from the movable mold supported by the movable mold platen in the mold open position.

[0010] The collection unit is, It is preferable to have a grinder for grinding the sprue runner.

[0011] The movable panel is The device is capable of moving back and forth between a mold-closed position, which is a position where the fixed mold supported by the fixed mold platen and the movable mold supported by the movable mold platen are in contact, and a mold-open position, which is a predetermined stopping position where the device is separated from the fixed mold platen and the fixed mold and the movable mold are spaced apart. The collection unit is, It is preferable that the movable mold plate moves between a standby position separated from the movable mold plate in the closed position and a recovery position separated from the movable mold plate in the open position, in conjunction with the forward and backward movement of the movable mold plate or the release of the molded product from the movable mold.

[0012] The foundation supporting multiple bases is It is provided with a conveyor that enables the molded product that falls from the recovery part at the recovery position to be transferred. The conveying direction of the molded product on the conveyor is Preferably, it is a direction that intersects the direction in which the movable mold plate moves forward and backward.

Advantages of the Invention

[0013] The recovery part of the mold clamping device according to the present invention reciprocates at a position lower than the area occupied by the fixed mold supported by the fixed mold plate and the movable mold supported by the movable mold plate. Since this recovery part is provided, for example, in the area between a pair of frames constituting the base, there is no need to modify the base due to the existence of the recovery part, and the function of the base is not impaired.

Brief Description of the Drawings

[0014] [Figure 1] It is a diagram showing a schematic configuration of a mold clamping device according to an embodiment. [Figure 2] It is a diagram showing a main part of a mold clamping device according to an embodiment. [Figure 3] It is a side sectional view showing a first aspect of a mold clamping device according to an embodiment. [Figure 4] It is a side sectional view showing a second aspect of a mold clamping device according to an embodiment. [Figure 5] It is a flowchart showing the operation procedure of the first aspect. [Figure 6] It is a flowchart showing the operation procedure of the second aspect.

Modes for Carrying Out the Invention

[0015] Hereinafter, the mold clamping device 1 according to the embodiment will be described with reference to the accompanying drawings. The clamping device 1 includes a container 21 that collects molding products such as molded articles and sprue runners and conveys them along the front-rear direction (longitudinal direction) L of the injection molding machine. After the injection molding is completed, the container 21 collects the molding product OP from the movable mold 14 at the collection position and moves to the discharge position at the rear (R) where the fixed mold platen 11 is provided. The molding product is discharged out of the system of the clamping device 1 from the container 21 that has moved to the discharge position through an aggregation groove 5 provided in the base 3 as an example.

[0016] [Schematic configuration of the clamping device 1: Refer to FIGS. 1 and 2] The clamping device 1 according to this embodiment includes a base 10, a fixed mold platen 11 fixedly supported on the base 10, and a movable mold platen 12 supported on the base 10 so as to be able to move forward and backward with respect to the fixed mold platen 11. Further, the clamping device 1 includes a tie bar 15 provided across the fixed mold platen 11 and the movable mold platen 12, a movable mold platen moving means 18 for moving the movable mold platen 12 forward and backward, and a split nut 19 that meshes with the tie bar 15 when clamping. In the clamping device 1, for the sake of convenience of explanation, as shown in FIG. 1 etc., front or forward (F) and rear or backward (R) are defined. This definition is relative. Also, in the clamping device 1, as shown in FIG. 1 etc., a front-rear direction (L), a height direction (H), and a width direction (W) are defined. The container 21 included in the clamping device 1 collects the molding product and conveys it from the front (F) toward the rear (R).

[0017] The fixed mold platen 11 is provided at the rear (R) which is one end side of the base 10, and the movable mold platen 12 is slidable with respect to the base 10 and is arranged to face the fixed mold platen 11. In the fixed mold platen 11 and the movable mold platen 12, the surfaces on the sides facing each other are referred to as front surfaces 11A, 12A, and the surfaces facing the front surfaces 11A, 12A are referred to as back surfaces 11B, 12B.

[0018] A fixed mold 13 is supported on the front surface 11A of the fixed mold platen 11, and a movable mold 14 is supported on the front surface 12A of the movable mold platen 12. A mold cavity is formed between the fixed mold 13 and the movable mold 14, into which molten resin is injected. Plasticized resin is supplied to this mold cavity from an injection device. The mold cavity and injection device are not shown in the illustration. The fixed platen 11 and the movable platen 12 are connected by multiple, usually four, tie bars 15. When viewed from the front, the four tie bars 15 are positioned at the four corners of the fixed platen 11 and the movable platen 12. Between the tie bars 15 and the holes in the four corners of the movable platen 12 into which the tie bars 15 are fitted, a sliding member, such as a tie bar guide bush as described in Patent Document 1, can be interposed to reduce friction between them.

[0019] The tie bar 15 has a piston 16 for generating clamping force on the side of the fixed mold plate 11, and an annular groove 17 that runs in the circumferential direction is formed on the side of the movable mold plate 12. Furthermore, the base 10 is provided with, for example, an electrically operated or hydraulically operated movable mold platen moving mechanism 18, which allows the movable mold platen 12 to reciprocate relative to the fixed mold platen 11. Figure 1 shows the mold closed state in which the movable mold platen 12 is moved toward the fixed mold platen 11 by the movable mold platen moving mechanism 18, and the movable mold 14 is in contact with the fixed mold 13.

[0020] The split nuts 19 are positioned on the back side 12B of the movable mold plate 12, corresponding to each of the four tie bars 15. The split nuts 19 have a split nut annular groove 28 on their inner surface that engages with the annular groove 17 of the tie bar 15.

[0021] The base 10 is supported by the foundation 3 and comprises two frames 10A and 10B spaced apart in the width direction (W). The upper surfaces of frames 10A and 10B form support surfaces for the fixed platen 11 and the movable platen 12. Space extends between frames 10A and 10B in the front-to-back direction (L) and the width direction (W). A collection unit 20 containing a container 21 and a moving unit 40 (Figure 3) for moving the collection unit 20 in the front-to-back direction (L) are arranged in this space. Frames 10A and 10B are arranged parallel to each other as an example, and the direction of movement of the collection unit 20 is parallel to frames 10A and 10B.

[0022] [Recovery unit 20: See Figures 2, 3, and 4] The recovery unit 20 recovers the molded product OP released from the movable mold 14 at a recovery position CP that is separated from the movable mold plate 12 and can be collected in the container 21 when the mold is opened after the mold has solidified and the movable mold 14 has moved to its furthest forward position (F). After recovering the molded product OP, the recovery unit 20 moves to the discharge position EP directly in front of the fixed mold plate 11 and then discharges the molded product OP. In the following, two types of recovery units 20 will be described: a recovery unit 20A relating to the first embodiment and a recovery unit 20B relating to the second embodiment. Recovery unit 20A moves the recovered molded product OP from the recovery position CP to the discharge position EP in its original form. Recovery unit 20B crushes the recovered molded product OP while it is moving from the recovery position CP to the discharge position EP. The following will describe recovery unit 20A and recovery unit 20B in that order. Note that recovery unit 20 is a general term for both recovery unit 20A and recovery unit 20B. The recovery unit 20 moves back and forth between the fixed platen 11 and the movable platen 12 in the horizontal region which is the space between frame 10A and frame 10B as described above, and in the vertical region which extends in the height direction (H) from said space.

[0023] [Recovery section 20A: See Figures 3, 2, and 1] The recovery unit 20A includes a container 21 for receiving the molded product OP, a first actuator 23 for discharging the molded product OP received in the container 21 to the outside of the container 21, and a second actuator 25 for opening and closing a door 22 for discharging the molded product OP. The recovery unit 20A also includes a trolley 27 that supports the container 21 and is movable in the forward and backward direction L, and a pair of guide rails 29, 29 on which the trolley 27 travels. The recovery unit 20A reciprocates at a position lower than the area occupied by the fixed mold 13 supported by the fixed mold platen 11 and the movable mold 14 supported by the movable mold platen 12. The area occupied here refers to the spatial area necessary for the movable mold 14 to pass through without obstruction when moving forward and backward, and the spatial area occupied by the fixed mold 13, and "a position lower than the area occupied" is a requirement to ensure that the movement of the recovery unit 20A is not hindered by the fixed mold 13 and the movable mold 14. The same applies to the recovery unit 20B.

[0024] [Container 21] The container 21 comprises a main body 211 with an opening 212 at the top for receiving the molded product OP that falls in. The main body 211 comprises a front wall 213 facing forward (F), a rear wall 214 facing backward (R), and side walls 215, 215 connecting the front wall 213 and the rear wall 214. For example, the front wall 213 is inclined toward the front (F), and the rear wall 214 and the side walls 215, 215 are parallel to the height direction H. The opening area of ​​the container 21 narrows downward from the opening 212. The container 21 is provided with an outlet 217 in its rear wall 214, which is an opening through which the molded product OP is discharged. The outlet 217 is provided with a door 22. The container 21 comprises a guide section 21A with a variable opening area and a storage section 21B connected below the guide section 21A and having a uniform opening area. The molded product OP removed from the movable mold 14 passes through the guide section 21A and accumulates in the storage section 21B. The discharge port 217 is provided corresponding to this storage section 21B.

[0025] [First actuator 23] The first actuator 23 pushes the recovered molded product OP toward the rear (R) and discharges it from the discharge port 217. The first actuator 23 is composed of, for example, an air cylinder, and an extrusion plate 24 is provided at the tip of its piston rod. The first actuator 23 is attached to the container 21 such that the extrusion plate 24 faces rearward (R), and by driving the piston toward the rearward (R), the molded product OP stored in the storage section 21B is pushed out from the discharge port 217.

[0026] [Second actuator 25] The second actuator 25 opens and closes the door 22. The second actuator 25 is composed of, for example, an air cylinder. The second actuator 25 is pivotably mounted to the rear wall 214 of the container 21 such that the piston rod faces downward. The lower end of the piston rod is pivotably fixed to the door 22, so that the outlet 217 is closed when the piston rod is extended and opened when the piston rod is retracted.

[0027] [Moving part 40: See Figure 3] The moving unit 40 moves the trolley 27, which is mounted on the guide rails 29, 29, from rear (R) to front (F), and from front (F) to rear (R). The moving unit 40 uses a ball screw to move the trolley 27. The movable part 40 includes a ball screw shaft 41 whose position is fixed along the front-rear direction L, and a ball screw nut 43 that engages with the ball screw shaft 41. The movable part 40 also includes screw shaft support members 45A and 45B that rotatably support the ball screw shaft 41 at both ends, an electric motor 47 that provides rotational driving force to the ball screw shaft 41, and a power transmission mechanism 49 that transmits the rotational driving force of the electric motor 47 to the ball screw shaft 41, for example by belt drive. Furthermore, the movable part 40 includes a connecting body 48 that connects the ball screw nut 43 to the trolley 27, and the ball screw nut 43 is fixed to the trolley 27. In this embodiment, the movable part 40 is exemplified by ball screw drive, but the movable part 40 is not limited to ball screw drive and may employ other drive methods, such as trapezoidal screw drive or hydraulic cylinder drive.

[0028] In the moving section 40, if the electric motor 47 is rotated forward, for example, the ball screw nut 43 moves from rear (R) to front (F), causing the trolley 27 to which the ball screw nut 43 is fixed to travel from rear (R) to front (F), thereby moving the container 21 to the collection position CP near the movable platen 12. Also, in the moving section 40, if the electric motor 47 is rotated backward, for example, the ball screw nut 43 moves from front (F) to rear (R), causing the trolley 27 to which the ball screw nut 43 is fixed to travel from front (F) to rear (R), thereby moving the container 21 to the discharge position EP near the fixed platen 11. In order to shorten the movement time of the moving part 40, it is effective to shorten the movement stroke. For this purpose, it is preferable that the recovery position CP of the recovery part 20 be as close as possible to the fixed mold platen 11 and as far as possible from the movable mold platen 12. Even if the recovery position CP of the moving part 40 is as far as possible from the movable mold platen 12, it is effective that the front wall 213 of the container 21 is tilted forward (F) in order to position the opening 212 of the container 21 close to the movable mold 14.

[0029] The movable part 40 can be positioned arbitrarily as long as it allows the trolley 27 to run on it. For example, it can be installed in a recess in the foundation 3 between the guide rails 29, 29, or positioned to the side of the foundation 3. However, it is preferable that the movable part 40, excluding the connecting body 48, be positioned lower than the upper surface of the frames 10A, 10B so as not to interfere with the movement area of ​​the movable panel 12.

[0030] [Recovery section 20B: See Figure 4] Next, the recovery unit 20B will be described. Since the recovery unit 20B has the same configuration as the recovery unit 20A, the same components as the recovery unit 20A will be given the same reference numerals as the recovery unit 20B (Figure 3), and their explanation will be omitted. Below, the explanation will focus on the differences from the recovery unit 20A, namely the crusher 26.

[0031] The recovery unit 20B is equipped with a crusher 26 inside the container 21. The crusher 26 crushes the sprue runner in particular from the molded product OP to facilitate its subsequent disposal, for example, direct use in injection molding machines or extrusion molding machines as recycled resin raw material. Here, "sprue runner" does not refer to the molten resin passage within the mold from the time the molten resin is injected into the mold during the injection molding process until it reaches the cavity where the product is formed, but rather to the resin material that has solidified within the molten resin passage before reaching the cavity, and is a non-product part.

[0032] The pulverizer 26 includes, as an example, a pair of rotating bodies 26A and 26B, each having irregularities formed on its outer circumference. The sprue runner (OP) falling from the movable mold 14 is pulverized into fine resin lumps as it passes between the rotating bodies 26A and 26B. The pulverization of the sprue runner (OP) is preferably performed from the time the sprue runner (OP) begins to fall into the recovery unit 20B at the recovery position CP until the recovery unit 20B moves to the discharge position EP.

[0033] When the recovery unit 20B moves to the discharge position EP, the second actuator 25 is driven to open the door 22, and the first actuator 23 is driven to transport the crushed material to the aggregation groove 5.

[0034] [Collection groove 5: See Figures 2, 3, and 4] The molded product OP, transported by the recovery units 20A and 20B to the discharge position EP in front of the fixed mold plate 11, is transferred to a collection groove 5 formed in the base 3. The collection groove 5 is formed by excavating the base 3 so as to extend in a direction intersecting the front-rear direction L, typically in the width direction W. The collection groove 5 is also an example of a recovery element as a space formed below the base 10 that supports the fixed mold plate 11 and the movable mold plate 12. The molded product OP discharged into the collection groove 5 is then transported to the outside of the collection groove 5. The direction in which the molded product OP is discharged is indicated by the white arrow in Figure 2. Discharge of the molded product OP can also be performed by providing a conveyor 7 in the collection groove 5. The transport direction of the conveyor 7 is along the width direction W as an example of an intersection, and the molded product OP that has fallen into the collection groove 5 is transported out of the system of the mold clamping device 1. In this case, if the aggregation groove 5 is formed below the fixed platen 11, it is preferable that the discharge port 217 of the container 21 be positioned close to the fixed platen 11. However, in order to bring the discharge port 217 closer to the fixed platen 11 without interference between the fixed platen 11 and the rear wall 214, it is effective that the rear wall 214 is parallel to the front surface 11A of the fixed platen 11 in the height direction H.

[0035] [Operation explanation: See Figures 5 and 6] Next, the operation of the recovery unit 20A will be explained with reference to Figure 5. While the molding cycle continues, the following standby (S101) to standby (S115) is repeated.

[0036] Standby (S101): During mold clamping, when molten resin is being injected into the mold cavity, the recovery unit 20A is on standby at the discharge position EP near the fixed mold plate 11. Forward movement (S103): Once the injection of molten resin into the mold cavity is complete, the movable mold platen 12 performs a mold opening operation to separate the movable mold 14 from the fixed mold 13. In conjunction with this mold opening operation, the recovery unit 20A moves forward in the mold opening direction. This forward movement is performed by rotating the electric motor 47 of the moving unit 40. Here, "synchronization" means that the recovery unit 20A starts moving in the same direction as the movable mold platen 12, based on the start of the movement of the movable mold platen 12. Specifically, this means that the movement of the recovery unit 20A is performed so as not to interfere with the moving movable mold platen 12. However, as long as the movement of the recovery unit 20A is performed so as not to interfere with the moving movable mold platen 12, the timing of the start of the movement of the recovery unit 20A may be simultaneous with the timing of the start of the movement of the movable mold platen 12, or it may be earlier or later than the timing of the start of the movement of the movable mold platen 12. Furthermore, the movement speed of the recovery unit 20A may be the same as the movement speed of the movable platen 12, or it may be faster or slower than the movement speed of the movable platen 12.

[0037] Stopping (S105): The movable mold 14 stops at a predetermined stopping position, and the recovery unit 20A stops at a predetermined recovery position CP. At this time, the timing of the recovery unit 20A stopping may be earlier or later than the timing of the movable mold plate 12 stopping, provided that the recovery unit 20A stops in a manner that does not interfere with the movable mold plate 12 while it is moving or stopped. At this recovery position CP, the container 21 of the recovery unit 20A encompasses the area from which the molded product OP (e.g., sprue runner) falls from the movable mold 14. Dropping (S107): The removal of the molded product from the movable mold 14 begins, and the resulting molded product OP is released from the movable mold 14 and falls towards the container 21.

[0038] Recovery (S109): The recovery unit 20 recovers the molded product OP by receiving the falling molded product OP in the container 21 of the recovery unit 20. Retraction (S111): The movable mold 14 retracts toward the fixed mold platen 11 in order to close the mold for the next molding cycle. In conjunction with the retraction of the movable mold platen 12, the recovery unit 20 retracts to the discharge position EP near the fixed mold platen 11 and stops. In conjunction with this retraction, the recovery unit 20A begins to retract in the same direction as the retraction of the movable mold platen 12, based on the timing of the retraction start of the movable mold platen 12 or the timing of the release of the molded product OP from the movable mold 14. Specifically, this means that the retraction of the recovery unit 20A is performed so as not to interfere with the retracting movable mold platen 12. However, as long as the retraction of the recovery unit 20A is performed so as not to interfere with the retracting movable mold platen 12, the timing of the start of the retraction of the recovery unit 20A may be simultaneous with the start of the retraction of the movable mold platen 12, or it may be earlier or later than the timing of the start of the retraction of the movable mold platen 12. Also, the retraction speed of the recovery unit 20A may be the same as the retraction speed of the movable mold platen 12, or it may be faster or slower than the retraction speed of the movable mold platen 12. Furthermore, if the retraction of the recovery unit 20A is performed in a manner that does not interfere with the movable platen 12 while it is retracting, the timing of the recovery unit 20A stopping retraction may be simultaneous with the timing of the movable platen 12 stopping retraction, or it may be earlier or later than the timing of the movable platen 12 stopping retraction.

[0039] Discharge (S113): When the recovery unit 20 retracts to the discharge position EP and stops, the second actuator 25 is driven to open the door 22, and then the first actuator 23 is driven to discharge the sprue runner (OP) into the collection groove 5. Standby (S115): After the sprue runner (OP) is discharged into the collection groove 5, the second actuator 25 is driven to close the door 22, and the first actuator 23 is driven to return the extrusion plate 24 to its original position, and the machine stands by for the next molding cycle.

[0040] The recovery unit 20B, which is equipped with a crusher 26, employs the same procedure as the recovery unit 20A, but as shown in Figure 6, the process of crushing and storing the falling sprue runner (OP) with the crusher 26 installed inside the container 21 (S110) is performed between recovery (S109) and waiting (S101).

[0041] [effect] The clamping device 1, which includes a recovery unit 20A and a moving unit 40, provides the following effects. First effect: The recovery unit 20A reciprocates at a position lower than the area occupied by the fixed mold 13 supported by the fixed mold platen 11 and the movable mold 14 supported by the movable mold platen 12. Since the recovery unit 20A is provided in the area between frames 10A and 10B, there is no need to modify the clamping device 1 to add a dedicated space for the recovery unit 20A. Therefore, the recovery unit 20A can be easily added to a conventional clamping device 1 by retrofitting.

[0042] Second effect: When the mold is opened, the recovery unit 20A moves from the discharge position EP to the recovery position CP by the drive of the moving unit 40. Furthermore, after the recovery unit 20A recovers the molded product OP, such as the sprue runner, it moves from the recovery position CP to the discharge position EP by the drive of the moving unit 40. Moreover, the movement from the discharge position EP to the recovery position CP and the movement from the recovery position CP to the discharge position EP are performed in a manner that does not interfere with the forward and backward movement of the movable mold plate 12. Therefore, with the mold clamping device 1, the recovery of the molded product OP by the recovery unit 20A can be performed within the molding cycle when it is not performed, and since no special time is required to move the recovery unit 20A, the production efficiency of the molded product is not reduced.

[0043] Third effect: The clamping device 1 forms a collection groove 5 in the base 3 to which the molded product OP collected in the recovery section 20A is transferred. Therefore, the frames 10A and 10B are not divided in order to transport the molded product OP out of the system, and the rigidity of the frames 10A and 10B is not reduced, so the molding operation can be carried out without hindrance.

[0044] Fourth effect: Since the recovery unit 20B is equipped with a crusher 26, the final processing of the molded product OP can be easily performed. Moreover, the crushing of the molded product OP by the crusher 26 can be completed while moving from the recovery position CP to the discharge position EP, so no special time is required for crushing.

[0045] In addition to the above, it is possible to select or replace the configurations listed in the above embodiments, or to change them to other configurations as appropriate, as long as it does not deviate from the spirit of the present invention. An example has been shown in which the molded product OP is dropped into a collection groove 5 formed in the base 3, but the present invention is not limited to this. For example, a container 21 that has collected one cycle's worth of molded product OP can be tilted outward in the width direction W, while a self-propelled bucket is provided to collect the falling molded product OP, and the molded product OP for one cycle can be transferred to the bucket before being driven outside the system of the mold clamping device 1. Furthermore, if the foundation 3 is not a so-called concrete foundation but some kind of structure, the aggregation groove 5 may be formed by creating an opening for the structure in the width direction W of the base 10.

[0046] Furthermore, the effects of the present invention can be effectively obtained even when applied to clamping devices that are not limited to two-platen type clamping devices, but also to three-platen type clamping devices or toggle type clamping devices, etc., where the height of the base on which the fixed and movable mold plates are placed is low or the base is thin, and providing an opening in the base would significantly reduce the rigidity of the base. [Explanation of Symbols]

[0047] 1 Mold clamping device 3 Basics 5. Consolidation groove 10 bases 10A, 10B Frame 11 Fixed platen 12 Movable mold board 11A, 12A Front side 11B, 12B Reverse side 13 Fixed mold 14. Movable mold 15 Tie Bar 16 pistons 18 Movable mold platen moving means 20, 20A, 20B Recovery Unit 21 Container 21A Information Department 21B Storage section 211 Main Unit 212 Aperture 213 Front wall 214 Back wall 215 Side wall 217 Outlet 22 doors 23 First Actuator 24 Extruded sheet 25. Second Actuator 26. Crusher 27 bogies 28 Split nut ring groove 29 Guide rails 40 Mobile Unit 41 Ball screw shaft 43 Ball screw nut 45A, 45B Shaft support member 47 Electric motor 49 Power transmission mechanism OP Molding Results CP retrieval location EP discharge position H (height direction) W (width direction) L Anteroposterior direction

Claims

1. A fixed panel and a movable panel that can move forward and backward relative to the fixed panel, Multiple bases are arranged at intervals from each other, providing fixed support for the fixed mold plate and slidable support for the movable mold plate, The system includes a recovery unit that reciprocates between the fixed mold plate and the movable mold plate in a horizontal and vertical region between a plurality of base plates to collect the molded product, The aforementioned recovery unit is A clamping device that reciprocates at a position lower than the area occupied by the fixed mold supported by the fixed mold plate and the movable mold supported by the movable mold plate.

2. The clamping device according to claim 1, further comprising a moving part that is positioned lower than the support surfaces of the fixed mold plate and the movable mold plate on a plurality of bases, and that reciprocates the recovery part.

3. The aforementioned movable panel is The mold is movable between a mold-closed position, which is a position in which the fixed mold supported by the fixed mold plate is brought into contact with the movable mold plate, and a mold-open position, which is a predetermined stopping position in which the fixed mold and the movable mold are separated from the fixed mold plate. The aforementioned recovery unit is A mold clamping device according to claim 1 or 2, which collects the sprue runner as the molding result that falls from the movable mold supported by the movable mold platen in the mold open position.

4. The aforementioned recovery unit is The clamping device according to claim 3, further comprising a crusher for crushing the sprue runner.

5. The aforementioned movable panel is The mold can move back and forth between a mold-closed position, which is a position in which the fixed mold supported by the fixed mold plate is brought into contact with the movable mold plate, and a mold-open position, which is a predetermined stopping position in which the fixed mold and the movable mold are separated from the fixed mold plate. The aforementioned recovery unit is A mold clamping device according to claim 1 or 2, wherein it moves between a standby position spaced apart from the movable mold plate in the mold closed position and a recovery position spaced apart from the movable mold plate in the mold open position, in conjunction with the forward and backward movement of the movable mold plate or the discharge of the molded product from the movable mold.

6. The foundation supporting the multiple bases is The system includes a conveyor that allows the molded product falling from the collection unit at the collection position to be transferred. The conveying direction of the molded product in the conveyor is: The clamping device according to claim 5, wherein the direction is intersecting with the direction in which the movable mold plate moves forward and backward.

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