JP2017065147A - Runner takeout machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a runner takeout machine capable of more properly sorting molded articles and workpieces.SOLUTION: A sorting mechanism 10 of a runner takeout machine 9 converts linear motion of a movable die 3 in an opening/closing direction to rotary motion of a chuck 16 by using a rack-and-pinion mechanism 14 to hold and discharge a runner 8. Specifically, when the movable die 3 makes a die-opening action, the chuck 16 is rotated in the closing direction via the rack-and-pinion mechanism 14 to hold the runner 8. When the movable die 3 makes a die-closing action, the chuck 16 is rotated in the opening direction via the rack-and-pinion mechanism 14 to discharge the held runner 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a runner take-out machine for taking out a runner from a mold.

  2. Description of the Related Art Conventionally, a molding machine including a runner take-out machine that sorts runners from a molded product formed by injection molding, for example, is well known (see Patent Document 1, etc.). As a general runner take-out machine, one using a motor is known, and sorting is performed by dropping a runner smaller than the molded product downward using the difference in size between the molded product and the workpiece.

Japanese Patent Laid-Open No. 9-192610

  However, in the case of a general runner take-out machine, there is a problem that the runner may get into the molded product and cannot be sorted correctly. In addition, for example, even if an attempt is made to perform sorting work by a robot or the like, there is a situation in which a space for placing the robot cannot be taken because this type of mold is small.

  An object of the present invention is to provide a runner take-out machine that can more correctly sort molded products and workpieces.

  The runner take-out machine that solves the above problems separates and discharges the runner generated in the molded product from the molded product when the raw material is filled between the fixed mold and the movable mold to produce the molded product. In the configuration, a sorting mechanism that sorts the runner from the molded product in conjunction with at least one of the movable mold opening and the mold closing operation.

  According to this configuration, the runner is separated from the molded product by taking a movement of receiving and discharging the runner in conjunction with at least one of the movable mold opening and closing. For this reason, it becomes possible to sort a runner and a molded product reliably, for example, compared with a system which uses a difference in size between a molded product and a runner and drops the runner by its own weight. Therefore, it is possible to correctly sort the molded product and the workpiece.

  In the runner take-out machine, it is preferable that the sorting mechanism holds the runner when the movable mold takes a mold opening movement and discharges the runner when the movable mold takes a mold closing movement. According to this configuration, when the molded product is removed from the movable mold after the mold is opened, the molded product and the runner are cut in the mold. Therefore, when the runner is sorted, the runner separated from the molded product by cutting is closed. It is only necessary to discharge in the process.

  In the runner take-out machine, the sorting mechanism holds the runner by rotating with a rack and pinion mechanism that converts a linear motion when the movable mold is operated into a rotational motion, and a rotational motion of the rack and pinion mechanism. It is preferable to provide a runner take-out portion that performs the operation of discharging the air. According to this configuration, the gripped runner can be dropped downward by the runner take-out portion that rotates in conjunction with the rack and pinion mechanism, which is advantageous for smoothly discharging the runner.

  In the runner take-out machine, the chuck as the runner take-out portion includes a main body connected to the rack and pinion mechanism, and a movable piece biased in a closing direction by a biasing member, and the main body and the movable piece The chuck holds the runner by sandwiching the runner with the main body and the movable piece and grips the runner in conjunction with the movement when the movable mold takes a mold opening movement. When the movable mold takes a closing movement, the movable piece opens against the urging force of the urging member by contacting the movable piece with a stopper arranged in the rotation path of the chuck, It is preferable to release the runner that has been gripped. According to this configuration, the runner is sandwiched and held by the chuck, which is advantageous for grasping and discharging the runner firmly.

  In the runner take-out machine, a mechanism urging unit capable of urging the rack and pinion mechanism that is operable in the opening and closing direction of the movable mold in the mold opening direction of the movable mold, and the rack and pinion mechanism A movement restricting portion for positioning the rack in the mold opening direction, and when the movable mold moves between the mold opening position and the runner discharge position, the rack and pinion mechanism is moved by the mechanism biasing section in the mold opening direction. When the movable mold moves between the runner discharge position and the mold closing position, the pinion is allowed to turn on the rack by being positioned by the movement restricting portion while being urged by It is preferable that the rack and pinion mechanism is allowed to move integrally against the biasing force of the mechanism biasing portion. According to this configuration, even if the runner is discharged before the movable mold is positioned at the mold closing position, the rack and pinion mechanism is closed together with the movable mold after the runner take-out section discharges the runner. By adopting a structure that moves in the direction, it is possible to allow movement to a movable mold closing position.

  According to the present invention, the molded product and the workpiece can be more correctly sorted.

It is the schematic of the runner taking-out machine in one Embodiment, (a) is a figure at the time of a mold open state, (b) is a figure at the time of a mold closed state. The perspective view which shows the structure of the sorting mechanism of a runner take-out machine. The operation | movement figure when a metal mold | die takes a mold closed state. The operation | movement figure when resin is filled into the metal mold | die. Operational diagram when the movable mold starts moving in the mold opening direction. The operation diagram which shows the state in which the chuck | zipper hold | maintained the runner. The operation | movement figure when molding resin is extruded by the movable extrusion pin. The operation figure which shows a mode that a molded article is discharged | emitted. The operation diagram when the movable mold starts to move in the mold closing direction. The operation | movement figure which shows a mode that a chuck | zipper discharges a runner. The operation | movement figure when a metal mold | die returns to a mold closed state.

Hereinafter, an embodiment of a runner take-out machine will be described with reference to FIGS.
As shown in FIGS. 1A and 1B, the molding machine 1 includes a fixed mold 2 that is a fixed side of a mold and a movable mold 3 that is a movable side of the mold. The movable mold 3 is moved toward or away from the fixed mold 2 in a linear direction (in the direction of arrow A in FIG. 1A) by an actuator (not shown) such as a solenoid or a motor. The movable mold 3 is provided with a plurality of extrusion pins 4 for removing a molded product molded into the movable mold 3 from the movable mold 3. The movable mold 3 includes a mold opening position (the state shown in FIG. 1A) that is farthest from the fixed mold 2, and a mold closing position that the movable mold 3 is closest to the fixed mold 2 (the state shown in FIG. 1B). Move between the two positions.

  As shown in FIGS. 1 and 2, the molding machine 1 includes a runner take-out machine 9 that receives and discharges the runner 8 generated in the molded product 7 by mold molding. The runner take-out machine 9 includes a sorting mechanism 10 that sorts the molded product 7 and the runner 8 using an opening / closing movement of a mold (movable mold 3). The sorting mechanism 10 of this example holds the runner 8 in conjunction with this movement when the movable mold 3 takes a mold opening movement, and moves in conjunction with this movement when the movable mold 3 takes a mold closing movement. The operation of discharging the runner 8 is taken.

  As shown in FIG. 2, the sorting mechanism 10 includes a block portion 13 of a main body portion attached to the movable mold 3, and a rack and pinion mechanism 14 that converts linear motion when the movable mold 3 operates (opening / closing operation) into rotational motion. And a runner extraction portion 15 that performs an operation of holding and discharging the runner 8. The block portion 13 has a rectangular parallelepiped shape, for example, and is attached and fixed to the back surface of the movable mold 3. The runner take-out part 15 is preferably a chuck 16 capable of gripping the runner 8 by being sandwiched.

  The rack and pinion mechanism 14 is a mechanism that can convert linear motion into rotational motion, and includes a rack 19 and a pinion 20. The rack 19 is arranged next to the block portion 13 in the width direction (Y-axis direction in FIG. 2) and meshes with the gear 21 of the pinion 20. The shaft 22 of the pinion 20 is pivotally supported by the block portion 13 via a bearing 23 so as to be rotatable. The pinion 20 moves linearly along the rack 19 by rotating around the axis La of the shaft 22 in conjunction with the opening and closing movement of the movable mold 3.

  At one end of the rack 19, a rack and pinion mechanism 14 that can be operated in the opening / closing direction of the movable mold 3 (arrow A direction in FIG. 2) is attached to the movable mold 3 in the mold opening direction (arrow A1 direction in FIG. 2). A mechanism urging portion 26 that can be urged is provided. The mechanism urging portion 26 is preferably a damper or a spring, for example. The other end of the rack 19 is provided with a movement restricting portion 27 for positioning the rack 19 of the rack and pinion mechanism 14 in the mold opening direction. The movement restricting portion 27 is preferably a protrusion or a wall, for example.

  The chuck 16 includes a main body 30 that is connected to the rack and pinion mechanism 14 (pinion 20), and a movable piece 32 that is urged in the closing direction (the direction of arrow C1 in FIG. 2) by the urging member 31. The chuck 16 can hold the runner 8 by sandwiching the runner 8 between the main body 30 and the movable piece 32. The main body 30 of this example is formed in a substantially L shape (arm shape), and the base end is attached and fixed to the shaft 22 of the pinion 20. That is, the chuck 16 rotates around the axis La (in the direction of arrow B in FIG. 2) together with the pinion 20 when the pinion 20 rotates.

  The movable piece 32 is pivotally supported by the main body 30 so as to be rotatable around the axis Lb of the shaft 34 that connects the main body 30 and the movable piece 32 (in the direction of arrow C in FIG. 2). The urging member 31 includes a spring or the like provided between the main body 30 and the movable piece 32. At the tip of the movable piece 32, an inclined surface portion 35 whose surface is lowered toward the tip is formed. The chuck 16 grips the runner 8 by being sandwiched between the tip of the main body 30 and the tip of the movable piece 32. At the base of the movable piece 32, when the chuck 16 is rotated in the opening direction around the axis La (the direction of arrow B1 in FIG. 2), a contact protrusion 37 is provided that contacts a stopper 36 provided on the fixed side of the mold. It has been.

Next, operation | movement of the runner taking-out machine 9 is demonstrated using FIGS.
As shown in FIG. 3, when the molding machine 1 assumes the mold fully closed state, the movable mold 3 is positioned at the mold closing position closest to the fixed mold 2, and molding is performed between the fixed mold 2 and the movable mold 3. A gap 40 according to the mold of the product 7 is generated. Further, the chuck 16 is most open in the opening direction (in the direction of arrow B1 in FIG. 3) around the axis La, and the contact protrusion 37 is in contact with the stopper 36. At this time, the rack and pinion mechanism 14 moves linearly in the mold closing direction (in the direction of arrow A2 in FIG. 3) against the urging force of the mechanism urging portion 26, and is positioned at the extreme end in the mold closing direction.

  As shown in FIG. 4, when the mold is in the fully closed state, the resin as a raw material (shown by dots in the figure) is filled in the gap 40 of the mold. At this time, the resin is filled in both the gap in which the molded product 7 is formed and the gap in which the runner 8 is formed.

  As shown in FIG. 5, after filling the resin, the mold starts the mold opening operation, and the movable mold 3 starts to move linearly in the mold opening direction (the direction of arrow A1 in FIG. 5). The rack and pinion mechanism 14 (rack 19) is pushed by the mechanism urging portion 26 until the middle of the mold opening operation (runner discharge position) until it is integrated with the movable mold 3 to the specified position. It moves to. Thereby, the pinion 20 does not yet start rotating until the middle of the mold opening operation. Further, the molding resin 41 (an integrated product of the molded product 7 and the runner 8) remains attached to the movable mold 3 when the runner 8 is caught on the movable mold 3.

  As shown in FIG. 6, when the movable mold 3 moves linearly in the mold opening direction, when the rack 19 comes into contact with the movement restricting portion 27, the rack 19 stops moving, and only the movable mold 3 and the pinion 20 move. The chuck 16 and the pinion 20 rotate in the closing direction (the direction of arrow B2 in FIG. 6) around the axis La. When the chuck 16 rotates a maximum amount in the closing direction, it is guided to the inclined surface portion 35 at the tip of the movable piece 32 urged in the closing direction by the urging member 31 when the chuck 16 is completely turned, and the main body portion 30 and the movable piece. The runner 8 fits between 32. The runner 8 can be gripped by the chuck 16 because the root is buried in the movable mold 3 and firmly supported.

  As shown in FIG. 7, when the movable mold 3 moves the maximum amount in the mold opening direction and reaches the mold opening position, the extrusion pin 4 protrudes to remove the molding resin 41 from the movable mold 3. At that time, the molded product 7 and the runner 8 are separated by the gate cut mechanism (not shown) of the movable mold 3. The chuck 16 maintains the state where the runner 8 is held even after the molded product 7 and the runner 8 are separated.

  As shown in FIG. 8, the molded product 7 separated from the runner 8 falls downward due to its own weight. The dropped molded product 7 is discharged to a predetermined location of the molding machine 1 via a product chute (not shown) provided in the molding machine 1.

  As shown in FIG. 9, the molding machine 1 starts a mold closing operation for resin molding of the next molded product 7. At this time, the movable mold 3 starts linear movement in the mold closing direction (arrow A2 direction in FIG. 9). When the movable mold 3 moves in the mold closing direction, the pinion 20 starts to rotate in the direction opposite to that when the mold is opened in conjunction with the mold closing operation of the mold, and the chuck 16 holds the runner 8. It rotates in the opening direction around the axis La (in the direction of arrow B1 in FIG. 9).

  As shown in FIG. 10, when the movable mold 3 reaches the runner discharge position that is before the mold closing position, the contact protrusion 37 of the movable piece 32 contacts the stopper 36, and the movable piece 32 is biased by the biasing member 31. The main body 30 is opened against the above. As a result, the runner 8 sandwiched by the chuck 16 falls downward. The dropped runner 8 is discharged to a predetermined location of the molding machine 1 through a runner dedicated chute (not shown) provided in the molding machine 1.

  As shown in FIG. 11, the movable mold 3 that has reached the runner discharge position continues to move in the mold closing direction. At this time, the rack and pinion mechanism 14 moves in the mold closing direction integrally with the movable mold 3 against the urging force of the mechanism urging portion 26. When the mold closing is completed and the movable mold 3 is positioned at the mold closing position, the next resin molding can be performed. And the operation | movement of FIGS. 3-11 described above is repeated, and the molded article 7 is mass-produced.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) The runner take-out machine 9 has a sorting mechanism 10 that sorts the runner 8 from the molded product 7 by moving the movable die 3 in response to the opening and closing operations of the movable die 3. Is provided. For this reason, it is possible to reliably sort the molded product 7 and the runner 8 as compared with a method in which the runner 8 is dropped by its own weight or the like using the difference in size between the molded product 7 and the runner 8, for example. It becomes. Therefore, the molded product 7 and the runner 8 can be more correctly sorted.

  (2) Since the runner take-out machine 9 is operated in conjunction with the opening / closing movement of the movable mold 3, a motor or the like for operating the runner take-out machine 9 becomes unnecessary. Therefore, the size of the runner take-out machine 9 can be made compact.

(3) Since the runner take-out machine 9 is made compact, there is no problem with the placement location even if the mold has a limited placement space.
(4) The sorting mechanism 10 holds the runner 8 when the movable mold 3 takes a mold opening movement, and discharges the runner 8 when the movable mold 3 takes a mold closing movement. By the way, when the molded product 7 is removed from the movable mold 3 after the mold is opened, the molded product 7 and the runner 8 are cut by the gate cut mechanism of the mold. Therefore, when the runners 8 are sorted, the runners 8 separated by cutting need only be discharged in the process of mold closing.

  (5) The sorting mechanism 10 holds the runner 8 attached to the movable mold 3 by the runner take-out section 15 (chuck 16) that rotates by the rotational movement of the rack and pinion mechanism 14, and discharges it to a predetermined position of the mold. Therefore, the runner take-off part 15 (chuck 16) that rotates in conjunction with the rack and pinion mechanism 14 can drop the gripped runner 8 downward, which is advantageous for smoothly discharging the runner 8. Become.

  (6) When the movable die 3 takes the movement of opening the mold, the chuck 16 sandwiches and holds the runner 8 between the main body 30 and the movable piece 32 in conjunction with this movement, and the movable die 3 takes the movement of closing the die. When the movable piece 32 comes into contact with the stopper 36 disposed in the rotation path of the chuck 16, the movable piece 32 opens against the urging force of the urging member 31, and the gripped runner 8 is released. . Therefore, in sorting, the runner 8 is sandwiched and held by the chuck 16, which is advantageous for firmly grasping and discharging the runner 8.

  (7) When the movable mold 3 moves between the mold opening position and the runner discharge position, the rack and pinion mechanism 14 is positioned by the movement restricting section 27 while being urged by the mechanism urging section 26 in the mold opening direction. Thus, the pinion 20 is allowed to turn on the rack 19. When the movable mold 3 moves between the runner discharge position and the mold closing position, the movable mold 3 and the rack and pinion mechanism 14 are allowed to move integrally against the urging force of the mechanism urging portion 26. Yes. As described above, even if the runner 8 is completely discharged before the movable mold 3 is located at the mold closing position (runner discharge position), after the runner extraction portion 15 (chuck 16) discharges the runner 8, the rack is removed. By moving the pinion mechanism 14 together with the movable mold 3 in the mold closing direction, the movable mold 3 can be allowed to move to the mold closing position.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
-The chuck | zipper 16 is not restricted to the movement which pinches | interposes, If the runner 8 can be hold | maintained, it can change into another structure.

  The runner take-out portion 15 is not limited to the one that takes a rotating motion (chuck 16), and can be changed to another type, for example, one that takes a sliding motion and receives and discharges the runner 8.

  The rack and pinion mechanism 14 is not limited to a structure that moves integrally with the movable mold 3 between the runner discharge position and the mold closing position, and may have a structure that does not take this movement. In this case, for example, it is preferable that the chuck 16 discharges the runner 8 when the movable mold 3 takes the mold closing position.

The mechanism that converts the movement of the mold into the movement of the runner take-out portion 15 is not limited to the rack and pinion mechanism 14, and other mechanisms may be used.
The holding and discharging of the runner 8 may be performed by only one operation of mold opening or mold closing.

  The sorting mechanism 10 is not limited to the configuration described in the embodiment, and can be changed to another structure as long as the runner 8 can be held and discharged along with the operation of the mold.

  DESCRIPTION OF SYMBOLS 1 ... Molding machine, 2 ... Fixed type, 3 ... Movable type, 7 ... Molded product, 8 ... Runner, 9 ... Runner take-out machine, 10 ... Sorting mechanism, 14 ... Rack and pinion mechanism, 15 ... Runner extraction part, 16 ... Chuck , 19, rack, 20, pinion, 26, mechanism urging portion, 27, movement restricting portion, 30, body portion, 31 urging member, 32, movable piece, 36, stopper.

Claims (5)

In a runner take-off machine that separates and discharges the runner generated in the molded product when the molded product is manufactured by filling the raw material between the fixed mold and the movable mold,
A runner take-out machine comprising a sorting mechanism for sorting the runner from the molded product in conjunction with at least one of the movable mold opening and closing. 2. The runner take-out machine according to claim 1, wherein the sorting mechanism holds the runner when the movable mold takes a mold opening movement, and discharges the runner when the movable mold takes a mold closing movement. The sorting mechanism is
A rack and pinion mechanism that converts linear motion into rotational motion when the movable mold is operated;
The runner take-out machine according to claim 1, further comprising a runner take-out portion that rotates by the rotational movement of the rack and pinion mechanism and performs an operation of holding and discharging the runner. The chuck as the runner take-out part includes a main body connected to the rack and pinion mechanism and a movable piece biased in a closing direction by a biasing member, and sandwiches the runner between the main body and the movable piece. Hold the runner by
When the movable mold takes a mold opening movement, the chuck holds the runner between the main body and the movable piece in conjunction with the movement, and when the movable mold takes a mold closing movement, the chuck The movable piece is opened against the urging force of the urging member and the runner that has been gripped is released by contacting the movable piece with a stopper disposed in the rotation path. Runner take-out machine. A mechanism urging section capable of urging the rack and pinion mechanism that is operable in the movable mold opening and closing direction in the movable mold opening direction;
A movement restricting portion for positioning the rack of the rack and pinion mechanism in the mold opening direction;
When the movable mold moves between the mold opening position and the runner discharge position, the rack and pinion mechanism is positioned by the movement restricting portion while being urged by the mechanism urging portion in the mold opening direction. Is allowed to travel on the rack,
When the movable mold moves between the runner discharge position and the mold closing position, the movable mold and the rack and pinion mechanism are allowed to move integrally against the urging force of the mechanism urging portion. Item 5. The runner take-out machine according to item 3 or 4.

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