JP5280091B2 - Injection molding system and injection molding method - Google Patents

Abstract

This invention is to provide an injection molding system capable of shortening molding cycle, increasing productivity and miniaturizing the overall size of the injection molding system. The injection molding system of this invention comprises: a first mold installed at a first support component; a second mold facing toward the first mold and installed at a second support component; a mold-locking driving part for moving forward or backward the second mold and performing the mold closing, mold locking and mold opening of the mold device; an operation part equipped with an insertion member retaining part for retaining an insertion member; and operation part action processing means enabling the operation part to move toward the first mold and fix the insertion piece at the first mold from the beginning of mold opening to the completion. Since the operation part is moved toward the first mold and the insertion piece is fixed at the first mold from the beginning of mold opening to the completion, the molding cycle can be shortened thereby.

Description

  The present invention relates to an injection molding system and an injection molding method.

  Conventionally, a molding machine, for example, an injection molding machine, has a mold device, a mold clamping device, an injection device, and the like. A resin heated and melted in a heating cylinder of the injection device is injected at a high pressure into a mold. The mold device is filled in a cavity space, cooled and solidified in the cavity space, and then taken out as a molded product.

  Therefore, the mold apparatus has a fixed mold and a movable mold, and the mold clamping apparatus has a fixed platen to which the fixed mold is attached, and a movable platen to which the movable mold is attached. By driving the clamping motor, the movable platen is advanced and retracted, and accordingly, mold closing, mold clamping and mold opening of the mold apparatus are performed.

  On the other hand, the injection device includes a heating cylinder that heats and melts a resin supplied from a hopper, a screw that can be moved forward and backward in the heating cylinder, and a rotatable resin, and a molten resin. An injection nozzle for injecting is provided. When the screw is rotated by driving the metering motor, the resin weighed in front of the screw in the heating cylinder is stored, and when the screw is advanced by driving the injection motor, the resin is stored in the front. Resin is injected and filled into the cavity space of the mold apparatus in a state where mold clamping is performed.

  Then, the resin in the cavity space is cooled to become a molded product, and when the mold is opened, the stripper plate is advanced by driving the ejecting motor of the ejector device, and the molded product is ejected, Can be released.

  By the way, for example, when molding a molded product main body, that is, a molded product having a label attached to the molded product main body, the label is inserted into the injection molding machine having the above-described configuration, or the molded product is taken out. A robot is attached to form an injection molding system (see, for example, Patent Document 1).

  FIG. 2 is a diagram showing the main part of a conventional injection molding system, FIG. 3 is a first diagram showing the operation of the conventional injection molding system, and FIG. 4 is a second diagram showing the operation of the conventional injection molding system. 5 is a third diagram showing the operation of the conventional injection molding system, and FIG. 6 is a fourth diagram showing the operation of the conventional injection molding system.

  In the figure, 31 is a fixed platen, 32 is a movable platen disposed facing the fixed platen 31, 33 is a fixed mold attached to the fixed platen 31, and 34 is opposed to the fixed mold 33. A movable mold disposed and attached to the movable platen 32, 36 is a cavity formed in the fixed mold 33, and 38 is a molded product. The fixed mold 33 and the movable mold 34 constitute a mold apparatus. Is done.

  Reference numeral 41 denotes a robot arm which is an operation part of the robot. The robot arm 41 is lowered to take a position between the fixed mold 33 and the movable mold 34 (hereinafter referred to as “between molds”), that is, an operating position, and is raised to be a mold apparatus. The outside position, that is, the retracted position is taken.

  In this case, the molded product 38 is a cup having a label 40 attached to the outer peripheral surface of the side wall. For this reason, the cavity 36 is formed of a cup-shaped recess, and the movable mold 34 faces the cavity 36. And a cup-shaped core 37 (FIG. 5) is formed. Therefore, when the movable platen 32 is advanced and the mold apparatus is closed, a cavity space is formed between the molds.

  At the tip of the robot arm 41, when the robot arm 41 is placed at the operating position, a label holding portion 43 for inserting the label 40 into the cavity 36 protrudes from a portion facing the cavity 36. It is formed. Further, on the side opposite to the label holding portion 43 at the tip of the robot arm 41, when the robot arm 41 is placed at the operating position, the part 38 facing the core 37 receives the molded product 38 released from the mold. A molded product holding portion 44 for taking out from between the molds is formed to protrude.

The intrinsic height of the robot arm 41 is h1, the height of the molded product 38 is h2, and the robot arm 41 and the fixed mold 33 are prevented from interfering when the robot arm 41 is moved between the molds. The clearance required to do this is he1, and the clearance required to prevent the molded product 38 held by the robot arm 41 from interfering with the movable mold 34 is he2. When the distance required between the fixed mold 33 and the movable mold 34 when opening the mold is L, the distance L is L = h1 + 2 × h2 + he1 + he2.
become. Therefore, when performing mold opening of the mold apparatus, it is necessary to make the mold opening stroke at the mold opening limit representing the state where the movable mold 34 is placed most rearward larger than the distance L.

  In the injection molding system configured as described above, the movable mold 34 is retracted, and as shown in FIG. 3, the robot arm 41 is lowered while the mold apparatus is open to the set mold opening limit. It is placed in the operating position (state q1). At this time, the label 40 is held by the label holding portion 43, and the molded product 38 formed by the movable mold 34 in the previous molding cycle is held.

  Next, the robot arm 41 is advanced (state q <b> 2), the label 40 is inserted into the cavity 36, and set in the fixed mold 33.

  Subsequently, as shown in FIG. 4, the robot arm 41 is retracted (state q3), and the molded product holding portion 44 is brought into contact with the molded product 38 (state q4). Along with this, protrusion of the molded product 38 is started by an ejector device (not shown) disposed on the movable platen 32.

  Then, as shown in FIG. 5, the robot arm 41 is advanced (state q5), and the molded product 38 is released from the core 37 and is conveyed in a state of being held by the molded product holding portion 44. .

Next, as shown in FIG. 6, when the robot arm 41 is raised and placed in the retracted position (state q6), the movable platen 32 is advanced in the direction of the arrow, and the mold apparatus is closed. .
JP-A-10-230531

  However, in the conventional injection molding system, the robot arm 41 is placed in the operating position in a state where the mold device is opened to the mold opening limit, the label 40 is set, and then the molded product 38 is held. Since the robot arm 41 is placed at the retracted position, the molding cycle becomes long and the productivity is lowered.

  Therefore, it is possible to use a biaxial robot with two robot arms, set the label with one robot arm, and hold the molded product with the other robot arm, but use the biaxial robot. Then, the mold opening stroke becomes large, and the injection molding system becomes large.

  The present invention solves the problems of the conventional injection molding system, shortens the molding cycle, improves the productivity, and reduces the size of the injection molding system and the injection molding method. The purpose is to provide.

  Therefore, in the injection molding system of the present invention, the first mold attached to the first support member and the second mold attached to the second support member so as to face the first mold. An operation having a mold clamping drive unit for advancing and retreating the second mold, closing the mold, clamping and opening the mold device, and an insert holding part for holding the insert The operation part operation processing means for advancing the operation part toward the first mold and setting the insert in the first mold between the start of the part and the mold opening And have.

  According to the present invention, in the injection molding system, the first mold attached to the first support member and the second mold attached to the second support member so as to face the first mold. An operation having a mold clamping drive unit for advancing and retreating the second mold, closing the mold, clamping and opening the mold device, and an insert holding part for holding the insert The operation part operation processing means for advancing the operation part toward the first mold and setting the insert in the first mold between the start of the part and the mold opening And have.

  In this case, since the opening of the mold is started and finished, the operation part is advanced toward the first mold, and the insert is set in the first mold. Therefore, the molding cycle is shortened. can do.

  In addition, since a single-shaft operating device with one operating part can be used as an operating device for handling inserts and molded products, the mold opening stroke can be reduced, and the injection molding system can be miniaturized. Can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this case, an injection molding system using an injection molding machine as a molding machine will be described.

  FIG. 7 is a diagram showing an injection molding system according to the first embodiment of the present invention.

  In the figure, reference numeral 11 denotes an injection molding system. The injection molding system 11 includes an injection molding machine 12 and a robot 13 as an operation device for loading and unloading. The injection molding machine 12 includes a mold clamping device 15 and a mold. The mold clamping device 15 includes a fixed platen 31 as a first support member, a movable platen 32 as a second support member, and a mold (not shown) as a drive unit for mold clamping. The mold apparatus 16 includes a fixed mold 33 as a first mold and a movable mold 34 as a second mold.

  Therefore, when the movable platen 32 is advanced and retracted by driving the mold clamping motor and the movable mold 34 is brought into and out of contact with the fixed mold 33, the mold closing, mold clamping and mold opening of the mold apparatus 16 are performed. Done.

  The injection device 17 includes a heating cylinder 22 as a cylinder member that heats and melts the resin as the molding material supplied from the hopper 21, an injection nozzle 23 that injects the melted resin, and the heating cylinder 22. A screw (not shown) as an injection member that is rotatably and reciprocally disposed in the motor, and a metering motor (not shown) as a metering drive unit for rotating and measuring the screw. And an injection motor (not shown) as an injection driving unit for performing injection.

  When the screw is rotated by driving the metering motor, the resin weighed in front of the screw in the heating cylinder 22 is stored, and when the screw is advanced by driving the injection motor, the resin is stored in the front. The obtained resin is injected from the injection nozzle 23 and filled in a cavity space (not shown) of the mold apparatus 16 in a state where the mold clamping is performed.

  Next, the resin in the cavity space is cooled to form a molded product, and when the mold is opened, a projecting motor as a projecting drive unit of an ejector device (not shown) disposed on the movable platen 32 is driven. By doing so, a stripper plate (not shown) as the protruding element is advanced, and the molded product is protruded and released. In the present embodiment, a stripper plate is used as the protruding element, but an ejector pin can be used instead of the stripper plate.

  By the way, for example, when molding a molded product main body, that is, a molded product with a label as an insert attached to the molded product main body, the label is inserted into the injection molding machine 12 having the above configuration or the molded product is taken out. An injection molding system 11 is configured by attaching a robot 13 for the purpose. In addition to the label, a part or the like can be inserted as the insert.

  The robot 13 includes a robot arm 41 as an operation part, a moving mechanism 51 for moving the robot arm 41 up and down, and moving it forward and backward. The moving mechanism unit 51 is a lifting operation motor (not shown) as an elevating drive unit for raising and lowering the robot arm 41 and an advancing / retreating drive unit for moving the robot arm 41 back and forth. An advancing / retreating motor (not shown) is provided.

  Further, a control unit 60 for controlling the entire injection molding machine 12, a control unit 61 for controlling the entire robot 13, and a vacuum are provided in a frame Fr as a support unit that supports the injection molding system 11. A vacuum generator 62 and the like for generating are disposed. In the present embodiment, the control units 60 and 61 are arranged independently, but can be configured as a single control unit.

  FIG. 1 is a diagram showing a main part of an injection molding system according to the first embodiment of the present invention, FIG. 8 is a process diagram showing the operation of the injection molding system according to the first embodiment of the present invention, and FIG. FIG. 10 is a time chart showing the operation of the injection molding system in the first embodiment of the invention, FIG. 10 is a first diagram showing the operation of the injection molding system in the first embodiment of the present invention, and FIG. FIG. 12 is a third diagram illustrating the operation of the injection molding system according to the first embodiment of the present invention, and FIG. 13 is a diagram illustrating the operation of the injection molding system according to the first embodiment. It is a 4th figure which shows operation | movement of the injection molding system in 1st Embodiment. 8 and 9, the operation of the robot 13 will be described as a robot process, and the operation of the injection molding machine 12 will be described as a molding machine process.

  In the figure, 31 is a fixed platen, 32 is a movable platen, 33 is a fixed mold attached to the fixed platen 31, and 34 is arranged facing the fixed mold 33, and is movable attached to the movable platen 32. A mold 36 is a cavity formed in the fixed mold 33, 38 is a molded product, and 40 is a label.

  Reference numeral 41 denotes a robot arm that is an operation part of the robot moving mechanism 51. The robot arm 41 is lowered by the moving mechanism 51 to take an operating position that is a position between the molds, and is raised to take a retracted position that is a position outside the mold apparatus 16. The robot arm 41 is advanced and retracted by the moving mechanism unit 51.

  In this case, the molded product 38 is a cup having a label 40 attached to the outer peripheral surface of the side wall. For this reason, the cavity 36 is formed of a cup-shaped recess, and the movable mold 34 faces the cavity 36. Thus, a cup-shaped core 37 (FIG. 11) is formed. Accordingly, when the movable platen 32 is moved forward (moved toward the fixed platen 31 side) and the mold device 16 is closed, a cavity space (not shown) is formed between the molds.

  A first holding portion for setting the tip of the robot arm 41 by inserting the label 40 into the cavity 36 at a portion facing the cavity 36 when the robot arm 41 is placed in the operating position. A label holding portion 43 as an insert holding portion is formed so as to protrude toward the fixed mold 33. Further, on the side opposite to the label holding portion 43 at the tip of the robot arm 41, when the robot arm 41 is placed at the operating position, the part 38 facing the core 37 receives the molded product 38 released from the mold. A molded product holding part 44 as a second holding part for taking out from between the molds is formed to project toward the movable mold 34. The front end surface s1 of the fixed mold 33 and the front end surface s2 of the movable mold 34 constitute a parting line.

The intrinsic height of the robot arm 41 is h1, the height of the molded product 38 is h2, and the robot arm 41 and the fixed mold 33 are prevented from interfering when the robot arm 41 is moved between the molds. The clearance required to do this is he1, and the clearance required to prevent the molded product 38 held by the robot arm 41 from interfering with the movable mold 34 is he2. When the distance required between the fixed mold 33 and the movable mold 34 when opening the mold is L, the distance L is L = h1 + 2 × h2 + he1 + he2.
become. Therefore, it is necessary to make the mold opening stroke at the mold opening limit when the mold apparatus 16 performs mold opening larger than the distance L.

  The vacuum generator 62 generates a vacuum, generates a negative pressure in the label holding unit 43, the cavity 36, the molded product holding unit 44, and the like by the generated vacuum, and holds the label 40 by the label holding unit 43. The label 40 is held by the cavity 36, and the molded product 38 is held by the molded product holding unit 44. In the present embodiment, the molded product 38, the label 40, and the like are held by negative pressure, but can be held by static electricity.

  Next, the operation of the injection molding system 11 having the above configuration will be described.

  First, in the robot 13, when the label 40 is supplied to the robot 13 by a label supply device as an insert supply device (not shown), an insert operation processing means (insert operation processing unit) (not shown) of the control unit 61 performs an insert operation processing. Then, a negative pressure is generated in the label holding portion 43, and the label holding portion 43 sucks and holds the label 40 by the generated negative pressure (performs label removal).

  Subsequently, in the injection molding machine 12, a mold opening / closing processing means (a mold opening / closing processing unit) (not shown) of the control unit 60 performs a mold opening / closing process, drives the mold clamping motor, and moves the movable platen 32 backward. The mold opening of the device 16 is started.

  As shown in FIG. 10, when the mold apparatus 16 is opened to a predetermined position before the set mold opening limit, an instruction processing unit (instruction processing unit) (not shown) of the control unit 60 performs instruction processing. Then, an operation permission instruction for permitting the robot arm 41 to be lowered is sent to the control unit 61. When an operation permission instruction is received from the control unit 60, an operation part operation processing unit (operation part operation processing unit) (not shown) of the control unit 61 performs an operation part operation process and drives the lifting operation motor. The robot arm 41 is lowered and placed in the operating position. At this time, the label 40 is held by the label holding unit 43.

  In this case, since the molded product 38 is not molded in the first molding cycle, the operation part operation processing means drives the advancing / retreating operation motor and directs the robot arm 41 toward the fixed mold 33 at the timing t1. The insert operation processing means generates a negative pressure in the cavity 36, and the generated negative pressure causes the cavity 36 to move to the label 40. Aspirate and hold.

  Subsequently, the instruction processing means sends an operation permission instruction for allowing the robot arm to be raised at the timing t2 to the control unit 61. When the robot 13 receives the operation permission instruction, the operation part operation processing means moves up and down. The operating motor is driven to raise the robot arm 41 and place it in the retracted position.

  Then, in the injection molding machine 12, the first molding cycle is started. That is, the mold opening / closing processing means starts the mold closing of the mold apparatus 16 by driving the mold clamping motor at the timing t3, starts the mold clamping, and ends the mold clamping at the timing t4. Subsequently, an injection processing unit (injection processing unit) (not shown) of the control unit 60 performs injection processing, starts injection by the injection device 17 at timing t5, ends injection at timing t6, and starts holding pressure. At the timing t7, the holding pressure is finished and the cooling is started, and the cooling is finished at the timing t8. It should be noted that the metering starts as the cooling starts at the timing t7, and the metering ends as the cooling ends at the timing t8.

  In this way, the resin is filled in the cavity space of the mold device 16 and cooled, and the molded product 38 in which the label 40 is adhered to the side wall of the molded product body is molded.

  Subsequently, the robot 13 prepares to start the next molding cycle. That is, when the label 40 is supplied to the robot 13 by the label supply device, the insert operation processing means generates a negative pressure in the label holding unit 43, and the label holding unit 43 causes the label holding unit 43 to generate a label. Aspirate and hold 40 (take label).

  Next, in the injection molding machine 12, the next molding cycle is started. That is, the mold opening / closing processing means drives the mold clamping motor at timing t8 to retract the movable platen 32, and starts the mold opening of the mold apparatus 16. When the movable platen 32 reaches a predetermined position before the mold opening limit at timing t9, as shown in FIG. 10, the mold opening is stopped halfway at the predetermined position, and the movable platen 32 is stopped ( State q11). Further, the instruction processing means sends an operation permission instruction for permitting the robot arm 41 to be lowered to the control unit 61.

  When the operation permission instruction is received in the robot 13, the operation part operation processing means drives the elevating operation motor to lower the robot arm 41 and put it in the operation position. At this time, the label 40 is held by the label holding portion 43, and the molded product 38 is held by the core 37.

  The predetermined position is a position where the molded product 38 comes into contact with the molded product holding portion 44 when the molded product 38 is protruded by the stripper plate, and is calculated in advance and set as a molded product holding position.

  Further, a protrusion processing means (protrusion processing unit) (not shown) of the control unit 60 performs a protrusion process, drives the protrusion motor, moves the stripper plate forward (moves toward the fixed platen 31 side), and forms a molded product. 38 starts to protrude, and the molded product 38 is released from the movable mold 34.

  In the present embodiment, the molded product 38 is projected by advancing the stripper plate, but a slit (not shown) as an air blowing portion is formed at a predetermined position on the outer peripheral surface of the core 37. The molded product 38 can be projected by blowing air as a pressurized medium from the slit. In that case, the compressed air supply section as a pressurizing source and the slit are connected by a medium flow path, and the protrusion processing means opens and closes an on-off valve as a valve mechanism disposed in the medium flow path. The air can be selectively ejected from the slit. Note that the molded product 38 can be protruded by a stripper plate and air.

  Then, in the robot 13, a molded product operation processing unit (molded product operation processing unit) (not illustrated) of the control unit 61 performs a molded product operation process, and generates a negative pressure in the molded product holding unit 44 at timing t10. The molded product holding part 44 sucks and holds the molded product 38 released from the movable mold 34 by the negative pressure that has been applied.

  Subsequently, when the projection of the molded product 38 is completed at the timing t11, the operation part operation processing unit drives the advance / retreat operation motor to advance (move) the robot arm 41 toward the fixed platen 31 side, As shown in FIG. 11, the label 40 is set by inserting it into the cavity 36 at a timing t12 (state q12). During this time, the robot arm 41 is moved while holding the molded product 38.

  Further, in the injection molding machine 12, an insert holding processing unit (insert holding processing unit) (not shown) of the control unit 60 performs an insert holding process, generates a negative pressure in the cavity 36, and generates the negative pressure by the generated negative pressure. The cavity 36 sucks and holds the label 40. At this time, the protrusion processing means retracts the stripper plate, the mold opening / closing processing means drives the mold clamping motor to further retract the movable platen 32, and starts the mold opening of the mold apparatus 16 again. The movable platen 32 is retracted in the direction of the arrow.

  Next, when the mold apparatus 16 is opened to the mold opening limit at timing t13, the instruction processing means sends an operation permission instruction for permitting the robot arm 41 to be retracted to the control unit 61, and the robot 13 performs the operation. When the permission instruction is received, the operation part operation processing means drives the advancing / retreating motor to retract the robot arm 41 as shown in FIG. 12 (state q13).

  Subsequently, the instruction processing means sends an operation permission instruction for allowing the robot arm 41 to be raised to the control unit 61. When the robot 13 receives the operation permission instruction, the operation part operation processing means As shown in FIG. 13, the robot arm 41 is raised and placed in the retracted position.

  Next, in the injection molding machine 12, the mold opening / closing processing means drives the mold clamping motor at the timing t14 to move the movable platen 32 forward (move toward the fixed mold 33 side), so that the mold apparatus 16 Perform mold closing. Subsequently, in the robot 13, the molded product operation processing means stops generating a negative pressure in the molded product holding unit 44, and the molded product holding unit 44 releases the molded product 38.

  Thus, in the present embodiment, before the mold opening is completed, the molded product 38 is protruded by the stripper plate, sucked and held by the robot arm 41, and the label 40 is placed in the cavity 36 by the robot arm 41. Since it is set, the molding cycle can be shortened.

  Further, since a single-axis robot provided with one robot arm 41 can be used as the robot 13, the mold opening stroke can be reduced and the injection molding system can be miniaturized.

  By the way, in the present embodiment, the molded product 38 is ejected to release the mold and the molded product 38 is brought into contact with the molded product holding portion 44. However, the movable platen 32 is positioned. Thus, the molded product 38 can be brought into contact with the molded product holding portion 44, and then the mold can be released.

  Further, in the present embodiment, the cavity 36 is formed in the fixed mold 33 and the core 37 is formed in the movable mold 34, but the core 37 is formed in the fixed mold 33 and the movable mold 34 is formed. A cavity 36 can also be formed.

  Next, a second embodiment of the present invention in which the molded product 38 is brought into contact with the molded product holding portion 44 by positioning the movable platen 32 and then released will be described. In addition, about the thing which has the same structure as 1st Embodiment, the same code | symbol is provided and the effect of the same embodiment is used about the effect of the invention by having the same structure.

  FIG. 14 is a diagram for explaining a method of protruding a molded product according to the second embodiment of the present invention.

  In the figure, reference numeral 71 denotes a stripper plate as a protruding element, and the stripper plate 71 is attached to a fixed mold 33 as a first mold.

  In this case, in the injection molding machine 12, the mold opening / closing processing means drives the mold clamping motor to retract the movable platen 32 as the second support member, starts the mold opening of the mold apparatus 16, and moves the mold. When the platen 32 reaches a predetermined position before the mold opening limit, the mold opening is stopped halfway at the predetermined position, and the movable platen 32 is stopped.

  Subsequently, the instruction processing means sends an operation permission instruction for permitting the robot arm 41 as the operation part to be lowered to the control unit 61. When the robot 13 receives the operation permission instruction, the operation part operation processing means drives the lifting operation motor to lower the robot arm 41 and place it in the operation position. At this time, the label 40 is held by the label holding portion 43 as the first holding portion and the insert holding portion, and the molded product 38 is held by the core 37.

  The predetermined position is a position where the molded product 38 comes into contact with the molded product holding unit 44 as the second holding unit when the molded product 38 is protruded by the stripper plate, and is calculated in advance and set as the molded product holding position. Is done.

  Subsequently, in the injection molding machine 12, the mold opening / closing processing means drives the mold clamping motor to move the movable platen 32 forward (moves toward the fixed platen 31), and the molded product 38 is moved to the molded product holding portion 44. In this state, the molded product operation processing means generates a negative pressure in the molded product holding unit 44, and the molded product holding unit 44 serves as the second mold by the generated negative pressure. The molded product 38 released from the movable mold 34 is sucked and held.

  The protrusion processing means drives the protrusion motor to advance the stripper plate, and the mold opening / closing processing means drives the mold clamping motor to retract the movable platen 32 to move the molded product 38 to the movable mold. The mold 34 can be released.

  In the present embodiment, the cavity 36 is formed in the fixed mold 33 and the core 37 is formed in the movable mold 34. However, the core 37 is formed in the fixed mold 33 and the movable mold 34 is formed in the movable mold 34. A cavity 36 can also be formed.

  Next, a description will be given of a third embodiment of the present invention in which the molded product holding portion 44 is disposed in the robot arm 41 so as to be movable back and forth. In addition, about the thing which has the same structure as 1st Embodiment, the same code | symbol is provided and the effect of the same embodiment is used about the effect of the invention by having the same structure.

  FIG. 15 is a first diagram illustrating the operation of the injection molding system according to the third embodiment of the present invention, and FIG. 16 is a second diagram illustrating the operation of the injection molding system according to the third embodiment of the present invention. FIG. 17 is a third diagram illustrating the operation of the injection molding system according to the third embodiment of the present invention, and FIG. 18 is a fourth diagram illustrating the operation of the injection molding system according to the third embodiment of the present invention. FIG. 19 is a fifth diagram illustrating the operation of the injection molding system according to the third embodiment of the present invention.

  In this case, at the tip of the robot arm 41, a label holding portion 43 as a first holding portion and as an insert holding portion is provided at a portion facing the cavity 36 when the robot arm 41 is placed at the operating position. Is formed to project toward the fixed mold 33 as the first mold. Further, on the side opposite to the label holding portion 43, the molded product 38 released from the mold is received at the portion facing the core 37 when the robot arm 41 is placed at the operating position, and is taken out from between the molds. A molded product holding portion 44 as the second holding portion is formed to protrude toward the movable mold 34. The molded product holding portion 44 can be moved forward and backward with respect to the robot arm 41.

  For this purpose, a pneumatic cylinder 49 as a drive unit for holding the molded product 38 is disposed in the label holding portion 43, and the molded product holding portion 44 has a conical shape, and the molded product 38. And a rod portion 52 extending from the corresponding contact portion 50 toward the label holding portion 43 side. The rod portion 52 is provided on the pneumatic cylinder 49. It is formed integrally with a piston (not shown). Therefore, the contact portion 50 can be advanced and retracted by driving the pneumatic cylinder 49.

  The molded product holding unit 44 and the pneumatic cylinder 49 constitute a molded product holding unit. Further, a hydraulic cylinder, a rack and pinion, or the like can be used instead of the pneumatic cylinder 49 as a drive unit for holding the molded product 38.

  Next, the operation of the injection molding system 11 (FIG. 7) configured as described above will be described.

  First, when the movable platen 32 reaches a predetermined position before the mold opening limit, the mold opening / closing processing means stops the mold opening halfway at the predetermined position as shown in FIG. Is stopped (state q21). Then, the instruction processing means sends an operation permission instruction for permitting the robot arm 41 to be lowered to the control unit 61 (FIG. 7).

  When the operation permission instruction is received in the robot 13 (FIG. 7), the operation part operation processing means drives the elevating operation motor to lower the robot arm 41 and put it in the operation position. At this time, the label 40 is held by the label holding portion 43, and the molded product 38 is held by the core 37.

  Subsequently, the operation site activation processing means drives the advance / retreat operation motor to advance (move) the robot arm 41 toward the fixed platen 31 as shown in FIG. The operation part operation processing means drives the pneumatic cylinder 49 to advance the molded product holding portion 44 (state q22).

  Further, the protrusion processing means (protrusion processing unit) of the control unit 60 drives the protrusion motor, advances the stripper plate (moves toward the fixed platen 31 side), and starts the protrusion of the molded product 38. Then, the molded product 38 is released from the movable mold 34.

  Then, the molded product operation processing means (molded product operation processing unit) of the control unit 61 generates a negative pressure in the molded product holding unit 44, and the molded product holding unit 44 is moved by the generated negative pressure. The molded product 38 released from the mold 34 is sucked and held.

  Subsequently, the operation part operation processing means further drives the advance / retreat operation motor and sets the label 40 by inserting it into the cavity 36 as shown in FIG. 17 (state q23). During this time, the robot arm 41 is moved while holding the molded product 38.

  Further, in the injection molding machine 12, the insert holding processing means generates a negative pressure in the cavity 36, and the cavity 36 sucks and holds the label 40 by the generated negative pressure. At this time, the protrusion processing means retracts the stripper plate, the mold opening / closing processing means drives the mold clamping motor to further retract the movable platen 32, and starts the mold opening of the mold apparatus 16 again. The movable platen 32 is retracted.

  Next, when the mold apparatus 16 is opened to the mold opening limit, the instruction processing means sends an operation permission instruction for permitting the robot arm 41 to be retracted to the control unit 61, and the robot 13 gives the operation permission instruction. Upon receipt, the operation site activation processing means drives the advancing / retreating motor to retract the robot arm 41 as shown in FIG. 18 (state q24).

  Subsequently, the instruction processing means sends an operation permission instruction for allowing the robot arm 41 to be raised to the control unit 61, and upon receiving the operation permission instruction, the operation part operation processing means turns the lifting operation motor off. As shown in FIG. 19, the robot arm 41 is raised and placed in the retracted position.

  Thus, in the present embodiment, before the mold opening is completed, the robot arm 41 is advanced (moved) toward the fixed platen 31 side, and the molded product 38 is protruded by the stripper plate. Since the label 40 is set in the cavity 36 by the robot arm 41, the molding cycle can be shortened.

  Further, in the present embodiment, the cavity 36 is formed in the fixed mold 33 and the core 37 is formed in the movable mold 34, but the core 37 is formed in the fixed mold 33 and the movable mold 34 is formed. A cavity 36 can also be formed.

  The present invention is not limited to the above embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

It is a figure which shows the principal part of the injection molding system in the 1st Embodiment of this invention. It is a figure which shows the principal part of the conventional injection molding system. It is a 1st figure which shows operation | movement of the conventional injection molding system. It is a 2nd figure which shows operation | movement of the conventional injection molding system. It is a 3rd figure which shows operation | movement of the conventional injection molding system. It is a 4th figure which shows operation | movement of the conventional injection molding system. It is a figure which shows the injection molding system in the 1st Embodiment of this invention. It is process drawing which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a time chart which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a 1st figure which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a 2nd figure which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a 3rd figure which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a 4th figure which shows operation | movement of the injection molding system in the 1st Embodiment of this invention. It is a figure explaining the protrusion method of the molded article in the 2nd Embodiment of this invention. It is a 1st figure which shows operation | movement of the injection molding system in the 3rd Embodiment of this invention. It is a 2nd figure which shows operation | movement of the injection molding system in the 3rd Embodiment of this invention. It is a 3rd figure which shows operation | movement of the injection molding system in the 3rd Embodiment of this invention. It is a 4th figure which shows operation | movement of the injection molding system in the 3rd Embodiment of this invention. It is a 5th figure which shows operation | movement of the injection molding system in the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Injection molding system 16 Mold apparatus 31 Fixed platen 32 Movable platen 33 Fixed mold 34 Movable mold 40 Label 41 Robot arm 43 Label holding part

Claims (6)

(A) a first mold attached to the first support member;
(B) a second mold attached to the second support member so as to face the first mold;
(C) a mold clamping drive unit for moving the second mold forward and backward to perform mold closing, mold clamping and mold opening of the mold apparatus;
(D) an operation part provided with an insert holding part for holding the insert;
(E) An operation part operation processing means for advancing the operation part toward the first mold and setting an insert in the first mold between the start and end of mold opening. An injection molding system characterized by comprising: (A) The operation part includes a molded product holding part for holding a molded product protruding from the second mold,
(B) The injection part molding system according to claim 1, wherein the operation part operation processing means holds the molded product by the molded product holding part between the start and end of mold opening.   The injection molding system according to claim 2, wherein the molded product holding unit is disposed so as to be movable forward and backward with respect to the operation part.   4. The injection molding system according to claim 2, wherein the operation site activation processing unit sets an insert in a first mold after holding the molded product by the molded product holding unit. 5.   5. The mold opening / closing processing means for temporarily stopping the second mold performing mold opening when the operation part operation processing means holds a molded product. Injection molding system. The first mold attached to the first support member, the second mold attached to the second support member, disposed opposite to the first mold, and the second mold In an injection molding method of an injection molding system having an operation part provided with a drive unit for mold clamping for performing mold closing, mold clamping and mold opening, and an insert holding part for holding an insert ,
An injection molding method characterized by advancing the operation portion toward the first mold and setting an insert in the first mold between the start and end of mold opening .

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