JP2022153056A - Vertical injection molding machine, heating cylinder replacement jig, and heating cylinder replacement method for vertical injection molding machine - Google Patents

Abstract

To provide a vertical injection molding machine that can control the increase in height dimension, a heating cylinder replacement jig that can be worked manually and can control damage to the heating cylinder, and a heating cylinder replacement method using the heating cylinder replacement jig.SOLUTION: In the vertical injection molding machine 1, the upper limit position Pm of the heating cylinder holding plate 13 during normal operation is set so that the screw holding plate 14 does not collide with the connecting bracket 15b even when the heating cylinder holding plate 13 moves upward when the heating cylinder holding plate 13 and the screw holding plate 14 are separated by the maximum separation distance Dm during normal operation. The vertical injection molding machine 1 has two modes: a normal operation mode in which the heating-tube holding plate 13 is restricted from moving above the upper limit position Pm during normal operation, and a heating-tube replacement mode in which the heating-tube holding plate 13 is allowed to move above the upper limit position Pm during normal operation.SELECTED DRAWING: Figure 6

Description

The present invention relates to a vertical injection molding machine, a heating cylinder replacement jig, and a heating cylinder replacement method for a vertical injection molding machine.

In a vertical injection molding machine, a heating cylinder is attached so as to be suspended from a heating cylinder holding plate of an injection unit. Patent Documents 1 and 2 disclose techniques for exchanging the heating cylinder of such a vertical injection molding machine.

In the vertical injection molding machine disclosed in Patent Document 1, the heating cylinder is exchanged using a heating cylinder exchange jig. The heating cylinder replacement jig has a slider body, a slider plate slidably provided on the slider body, and a tubular heating cylinder insertion holding portion fixed to the upper surface of the slider plate. When removing the heating cylinder, the operator places the slider body of the heating cylinder replacement jig on the upper surface of the movable die plate, moves the heating cylinder holding plate downward, and inserts the tip of the heating cylinder into the heating cylinder insertion holding part. do. Then, the operator removes the heating cylinder from the heating cylinder holding plate, slides the slider plate with respect to the slider body, and moves the heating cylinder held by the heating cylinder insertion holding portion to the side of the vertical injection molding machine. to a predetermined position.

In the vertical injection molding machine disclosed in Patent Document 2, a connecting means having a pivot point is provided on the plasticizing unit mounting plate, and the plasticizing unit (corresponding to the heating cylinder) is rotated about the pivot point. It is configured to be attached and detached by

Japanese Unexamined Patent Application Publication No. 2012-153110 JP-A-4-208427

In the vertical injection molding machine of Patent Document 1, a heating cylinder holding plate is provided so as to be vertically movable by a ball screw mechanism. A vertical injection molding machine has a screw holding plate (linear motion plate) to which a screw is attached. The screw holding plate is arranged above the heating cylinder holding plate, and is provided so as to be vertically movable with respect to the heating cylinder holding plate. A connection bracket for connecting the ball screw shaft is arranged above the heating cylinder holding plate. In a vertical injection molding machine, the heating cylinder holding plate moves upward when the heating cylinder holding plate and the screw holding plate are separated by the maximum possible separation distance during normal operation (maximum separation distance during normal operation). The upper limit position of the heating cylinder holding plate is set so that the screw holding plate does not collide with the connecting bracket even when the screw holding plate is pressed. Therefore, if the heating cylinder holding plate can be moved to a higher position in order to replace the heating cylinder, the connecting bracket must also be placed at a higher position to avoid collision, and the height of the vertical injection molding machine is increased. The dimension in the direction becomes large. Further, when the heating cylinder holding plate is moved downward when the heating cylinder is replaced, the tip of the heating cylinder collides with the heating cylinder insertion holding portion, which may damage the heating cylinder.

In the vertical injection molding machine of Patent Document 2, when attaching the plasticizing unit, the plasticizing unit is manually arranged along the vertical direction. However, when the size of the vertical injection molding machine is increased and the size of the plasticizing unit is also increased, it becomes very difficult to perform the operation manually.

Accordingly, the present invention provides a vertical injection molding machine capable of suppressing an increase in the dimension in the height direction, a heating cylinder replacement jig that allows manual work and suppresses damage to the heating cylinder, and a heating cylinder replacement jig. An object of the present invention is to provide a heating cylinder replacement method using a tool.

In order to achieve the above object, a vertical injection molding machine according to an aspect of the present invention is provided with a heating cylinder having a downward tip, a screw accommodated in the heating cylinder, and the heating cylinder. a heating cylinder holding plate; a screw holding plate disposed above the heating cylinder holding plate and to which the screw is attached; an injection device driving section for vertically moving the heating cylinder holding plate; A vertical injection molding machine having a screw driving section that moves vertically with respect to a heating cylinder holding plate, and a control device that controls the injection device driving section and the screw driving section, wherein the heating cylinder holding plate and the screw holding plate are separated by the maximum separation distance during normal operation, and the screw holding plate does not collide with the components of the vertical injection molding machine even when the heating cylinder holding plate moves upward. a normal operation mode in which a normal operation upper limit position of the heating cylinder holding plate is set, and the control device restricts movement of the heating cylinder holding plate above the normal operation upper limit position; and a heating cylinder replacement mode that allows the heating cylinder holding plate to move upward from the normal operation upper limit position.

To achieve the above object, a heating cylinder replacement jig according to another aspect of the present invention is a heating cylinder replacement jig used when replacing a heating cylinder of a vertical injection molding machine, A frame disposed below a heating cylinder holding plate of an injection molding machine, a slider attached to the heating cylinder and configured to be slidable on a movement lane provided horizontally on the frame, and the heating cylinder an elevating member for vertically moving the elevating member, the elevating member having a shaft attached to the frame by a screw structure; and a table attached to the upper end of the shaft; It is characterized in that the table is configured to move vertically by rotating it around an axis.

In order to achieve the above object, a heating cylinder replacement method according to another aspect of the present invention includes a heating cylinder having a downward tip, a screw accommodated in the heating cylinder, and a heating cylinder attached to the heating cylinder. a heating cylinder holding plate arranged above the heating cylinder holding plate, a screw holding plate to which the screw is attached, an injection device driving section for vertically moving the heating cylinder holding plate, and the screw holding plate. A heating cylinder replacement jig is used in a vertical injection molding machine having a screw driving section that moves vertically with respect to the heating cylinder holding plate, and a control device that controls the injection device driving section and the screw driving section. In the vertical injection molding machine, when the heating cylinder holding plate and the screw holding plate are separated by the maximum separation distance during normal operation, the heating cylinder is replaced by the heating cylinder. The normal operation upper limit position of the heating cylinder holding plate is set so that the screw holding plate does not collide with the components of the vertical injection molding machine even when the cylinder holding plate moves upward, and the control device However, a normal operation mode that restricts the movement of the heating cylinder holding plate above the normal operation upper limit position, and a heating mode that allows the heating cylinder holding plate to move above the normal operation upper limit position. and a cylinder exchange mode, wherein the heating cylinder exchange jig includes a frame, a slider configured to be slidable on a movement lane provided horizontally on the frame, and a slider that moves up and down the heating cylinder. an elevating member for moving in a direction, the elevating member having a shaft attached to the frame by a screw structure, and a table attached to an upper end of the shaft, the shaft being axially The table is configured to move in the vertical direction by rotating the table to the maximum value during normal operation by switching the control device to the heating cylinder replacement mode and moving the heating cylinder holding plate and the screw holding plate to the maximum during normal operation. The heating cylinder holding plate is moved above the upper limit position during normal operation, the frame is arranged below the heating cylinder holding plate of the vertical injection molding machine, and the slider is moved to the heating cylinder. The table is attached to a cylinder, the shaft of the elevating member is rotated around its axis, and the table is moved upward until it comes into contact with the tip of the heating cylinder, and the heating cylinder is removed from the heating cylinder holding plate. and place it on the table, rotate the shaft of the elevating member around its axis to move the table downward until the slider is placed on the lane for movement, and slide the slider on the lane for movement. and moving the heating cylinder horizontally together with the slider.

The vertical injection molding machine according to the present invention has a normal operation mode in which the heating cylinder holding plate is restricted from moving above the upper limit position during normal operation, and a normal operation mode in which the heating cylinder holding plate moves above the upper limit position during normal operation. and a heating cylinder exchange mode that allows As a result, when performing a normal operation such as a molding operation, it is possible to switch to the normal operation mode to avoid collision between the screw holding plate and the components of the vertical injection molding machine. Then, when replacing the heating cylinder, it is possible to switch to the heating cylinder exchange mode and move the heating cylinder holding plate above the normal operation upper limit position while paying attention to collision of the screw holding plate. Therefore, it is possible to suppress an increase in the dimension of the vertical injection molding machine in the height direction.

A heating cylinder replacement jig according to the present invention includes a frame disposed below a heating cylinder holding plate, and a slider attached to the heating cylinder and configured to be slidable on a movement lane provided horizontally on the frame. and an elevating member for vertically moving the heating cylinder. The elevating member has a shaft attached to the frame with a screw structure and a table attached to the upper end of the shaft, and the table moves up and down by rotating the shaft around the axis. It is configured. With this arrangement, the heating cylinder placed on the table can be manually moved vertically by attaching a handle or the like to the shaft of the elevating member and rotating it. In addition, the slider can easily move the heating cylinder in the horizontal direction.

Further, in the method for exchanging the heating cylinder according to the present invention, the operator switches the vertical injection molding machine to the heating cylinder exchange mode, brings the heating cylinder holding plate and the screw holding plate closer than the maximum separation distance during normal operation, The heating cylinder holding plate is moved above the normal operation upper limit position. Place the frame under the heating cylinder holding plate of the vertical injection molding machine. Attach the slider to the heating cylinder. The shaft of the elevating member is rotated around its axis to move the table upward until it abuts on the tip of the heating cylinder. Remove the heating cylinder from the heating cylinder holding plate and place it on the table. The shaft of the lift member is rotated about its axis to move the table downward until the slider rests on the travel lane. The slider is slid on the movement lane to horizontally move the heating cylinder together with the slider. With this configuration, the heating cylinder can be easily replaced manually.

1 is a front view of a vertical injection molding machine according to one embodiment of the present invention; FIG. It is a figure explaining the functional block of the vertical type injection molding machine of FIG. 2 is a perspective view of a heating cylinder replacement jig used for exchanging the heating cylinder of the vertical injection molding machine of FIG. 1. FIG. 4 is a front view of the heating cylinder replacement jig in FIG. 3. FIG. 4 is a right side view of the heating cylinder replacement jig in FIG. 3. FIG. FIG. 2 is a diagram for explaining a heating cylinder replacement method of the vertical injection molding machine of FIG. 1 (a state in which the heating cylinder holding plate and the screw holding plate are moved to the retraction limit position in the normal operation mode). FIG. 2 is a diagram for explaining a method of exchanging the heating cylinder of the vertical injection molding machine of FIG. moved upwards). FIG. 2 is a view for explaining a heating cylinder replacement method of the vertical injection molding machine of FIG. 1 (a state in which the frame of the heating cylinder replacement jig is arranged on the upper surface of the movable die plate); FIG. 2 is a view for explaining a heating cylinder replacement method of the vertical injection molding machine of FIG. 1 (a state in which an elevating member is attached to the frame of the heating cylinder replacement jig and a slider is attached to the heating cylinder); FIG. 2 is a view for explaining a method of exchanging a heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which a table of an elevating member is brought into contact with the leading end of the heating cylinder); FIG. 3 is a view for explaining a method of exchanging a heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which a slider attached to the heating cylinder is slid forward from the rear). FIG. 2 is a view for explaining a method of exchanging a heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which the exchanging heating cylinder is attached to the heating cylinder holding plate). FIG. 2 is a diagram for explaining a method of exchanging the heating cylinder of the vertical injection molding machine of FIG. position). FIG. 3 is a view for explaining a method of exchanging the heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which a screw is inserted into the exchanging heating cylinder). FIG. 2 is a view for explaining a method of exchanging the heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which the screw inserted into the exchanging heating cylinder is moved upward). FIG. 2 is a view for explaining a method of exchanging a heating cylinder of the vertical injection molding machine of FIG. 1 (a state in which a screw inserted into the exchanging heating cylinder is attached to a screw holding plate).

A vertical injection molding machine according to an embodiment of the present invention will be described below mainly with reference to FIGS. 1 and 2. FIG.

As shown in FIG. 1 , the vertical injection molding machine 1 has an injection device 10 , a mold clamping device 20 and a display operation device 30 on a base 5 . Moreover, as shown in FIG. 2, the vertical injection molding machine 1 has a control device 40 .

The injection device 10 injects and fills a cavity formed by the upper mold 2 and the lower mold 3 with a resin. The injection device 10 has a heating cylinder 11 and a screw 12 . The heating cylinder 11 is provided with a downward nozzle 11a at its tip. The screw 12 is housed inside the heating cylinder 11 .

The mold clamping device 20 opens and closes the upper mold 2 and the lower mold 3 and generates a mold clamping force to clamp the upper mold 2 and the lower mold 3 in a closed state. The mold clamping device 20 has a movable die plate 21 and a rotary table 22 . The movable die plate 21 has a flat plate shape, and the upper die 2 is attached to the lower surface 21a. As for the rotary table 22, the lower mold 3 is attached to the upper surface 22a. A plurality of lower molds 3 are attached to the rotary table 22 , and the rotary table 22 sequentially transports the plurality of lower molds 3 to a position facing the upper mold 2 by rotating. A cavity is formed when the upper mold 2 and the lower mold 3 are clamped by the mold clamping device 20 .

A heating cylinder 11 is arranged above the movable die plate 21 . A through hole 21 b is provided in the center of the movable die plate 21 . The through hole 21b penetrates from the lower surface 21a of the movable die plate 21 to the upper surface 21c. The upper portion of through hole 21b is formed in a mortar shape. The nozzle 11a is inserted into the through hole 21b from the upper surface 21c side. The injection device 10 injects molten resin into the cavity while the nozzle 11 a is in contact with the upper mold 2 .

As shown in FIG. 6 , the injection device 10 has a heating cylinder holding plate 13 and a screw holding plate 14 . FIG. 6 shows a state in which the cover of the injection device 10 is removed. The heating cylinder holding plate 13 holds the heating cylinder 11 so that the nozzle 11a faces downward and extends in the vertical direction. A base end portion of the heating cylinder 11 is attached to the heating cylinder holding plate 13 . The heating cylinder holding plate 13 is arranged above the base bracket 23 of the mold clamping device 20 so as to be vertically movable. A screw retaining plate 14 rotatably retains the screw 12 . A proximal end of the screw 12 is attached to the screw holding plate 14 . The screw holding plate 14 is arranged above the heating cylinder holding plate 13 so as to be vertically movable.

The injection device 10 has an injection device drive section 15 and a screw drive section 16 .

The injection device driving section 15 moves the heating cylinder holding plate 13 in the vertical direction. The injection device driving section 15 has a ball screw mechanism 15a and an electric motor (not shown) for moving the injection device. The ball screw mechanism 15a has a ball screw shaft 15a1 and a nut body 15a2. Ball screw shaft 15 a 1 is arranged to extend upward from base bracket 23 . Three ball screw shafts 15a1 are provided. The upper ends of the ball screw shafts 15a1 are connected by a connecting bracket 15b. The connecting bracket 15b is arranged above the screw holding plate 14. As shown in FIG. The nut body 15 a 2 is attached to the heating cylinder holding plate 13 . The nut body 15a2 moves vertically along the ball screw shaft 15a1 when rotated by the electric motor for moving the injection device. Three nut bodies 15a2 are provided corresponding to each ball screw shaft 15a1.

The screw drive unit 16 rotates the screw 12 and moves the screw 12 vertically. The screw drive unit 16 has a rotating member 16a, a ball screw mechanism (not shown), a screw rotating electric motor (not shown), and a screw moving electric motor (not shown). The rotating member 16a is configured to rotate integrally with the screw 12 . When the rotary member 16a is rotated by the electric motor for screw rotation, the screw 12 rotates around its axis. The ball screw mechanism of the screw driving section 16 is driven by a screw moving electric motor to vertically move the screw holding plate 14 to which the screw 12 is attached with respect to the heating cylinder holding plate 13 .

The display operation device 30 has a display unit 31 for displaying information related to the vertical injection molding machine 1 and an operation unit 32 for inputting operations. The display section 31 and the operation section 32 are connected to the control device 40 . The display unit 31 displays various screens on the display area based on the control signal from the control device 40 . The operation unit 32 has a plurality of keys, and transmits a signal to the control device 40 according to the operation input to each key. The display operation device 30 may include a touch panel superimposed on the display section 31 as the operation section 32, and may have a software switch configured by combining icons displayed on the display section 31 and the touch panel.

The control device 40 is composed of a microcomputer and controls the overall operation of the vertical injection molding machine 1 . The control device 40 has a memory that stores programs and data. The control device 40 controls the operation of each device such as the injection device 10 and the mold clamping device 20 . As shown in FIG. 2, the control device 40 is connected to the injection device 10 (injection device drive section 15, screw drive section 16), mold clamping device 20, and display operation device 30 (display section 31, operation section 32). there is

The memory of the controller 40 stores the maximum distance between the heating cylinder holding plate 13 and the screw holding plate 14 during normal operation (hereinafter referred to as "normal operation maximum separation distance Dm"). there is In normal operation, when the heating cylinder holding plate 13 and the screw holding plate 14 are separated by the maximum separation distance Dm during normal operation, the screw holding plate 14 is at the retraction limit position. Further, in the memory of the control device 40, when the heating cylinder holding plate 13 and the screw holding plate 14 are separated by the maximum separation distance Dm during normal operation, even when the heating cylinder holding plate 13 moves upward, the screw holding plate 14 stores the upper limit position (hereinafter referred to as "normal operation upper limit position Pm") of the heating cylinder holding plate 13 that does not collide with the components of the vertical injection molding machine 1 (specifically, the connection bracket 15b). there is The normal operation upper limit position Pm is the retraction limit position of the heating cylinder holding plate 13 in normal operation. A normal operation is a molding operation of the vertical injection molding machine 1 and an operation performed in relation to the molding operation.

The control device 40 has a normal operation mode and a heating cylinder replacement mode. In the normal operation mode, the control device 40 restricts the movement of the heating cylinder holding plate 13 above the normal operation upper limit position Pm. In the normal operation mode, the control device 40 performs normal operations such as a molding operation for injection molding a molded product and a purge operation for discharging the resin in the heating cylinder 11 . In the heating cylinder replacement mode, the controller 40 allows the heating cylinder holding plate 13 to move above the normal operation upper limit position Pm. In the heating cylinder replacement mode, the control device 40 performs operations necessary for replacing the heating cylinder 11 .

The controller 40 performs molding operations in the normal operation mode. In the molding operation, the control device 40 controls the mold clamping device 20 to clamp the upper mold 2 and the lower mold 3 . The control device 40 controls the injection device driving section 15 to bring the nozzle 11 a of the heating cylinder 11 into contact with the upper mold 2 . The controller 40 controls the screw drive unit 16 to rotate the screw 12 and move it upward together with the screw holding plate 14 to plasticize and weigh the resin. The control device 40 controls the screw driving section 16 to move the screw 12 downward together with the screw holding plate 14 to inject and fill the cavity with the resin. The control device 40 controls the clamping device 20 to open the upper mold 2 and the lower mold 3 for removing the molded product from the cavity.

In the heating cylinder exchange mode, the control device 40 controls the injection device driving section 15 and the screw driving section 16 to bring the heating cylinder holding plate 13 and the screw holding plate 14 closer than the maximum separation distance Dm during normal operation, The cylinder holding plate 13 is moved above the normal operation upper limit position Pm. Specifically, the control device 40 controls the injection device drive section 15 and the screw drive section 16 to move the heating cylinder holding plate 13 and the screw holding plate 14 to the minimum required distance for exchanging the heating cylinder 11 ( hereinafter referred to as "heating cylinder replacement distance Dn"), and the heating cylinder holding plate 13 is moved to the highest position where the screw holding plate 14 does not collide with the connecting bracket 15b (hereinafter referred to as "heating cylinder replacement upper limit position Pn”). The heating cylinder replacement distance Dn is smaller than the maximum separation distance Dm during normal operation. The heating cylinder replacement upper limit position Pn is higher than the normal operation upper limit position Pm. Note that the heating cylinder replacement distance Dn may be a mechanical limit proximity distance between the heating cylinder holding plate 13 and the screw holding plate 14 .

Next, the heating cylinder replacement jig 100 used when replacing the heating cylinder 11 of the vertical injection molding machine 1 will be described mainly with reference to FIGS. 3 to 5. FIG.

The heating cylinder replacement jig 100 has a frame 110 , a slider 120 and an elevating member 130 . The lifting member 130 is shown in FIG. 10 and the like.

The frame 110 is arranged on the upper surface 21c of the movable die plate 21 and fixed to the movable die plate 21 with bolts. The frame 110 has a rectangular parallelepiped frame body 111 and has a movement lane 112 extending horizontally above the frame body 111 . The frame 110 also has a guide post 113 extending upward from the frame body 111 . The guide post 113 is arranged along the vertical direction. The guide post 113 is detachable from the frame body 111 .

The slider 120 is attached to the heating cylinder 11 . The slider 120 has a slider body 121 , wheels 123 and a handle 124 . The slider body 121 has a flat plate shape, and is provided with a heating cylinder holding hole 122 in which the heating cylinder 11 is arranged. The diameter of the heating cylinder holding hole 122 is the same as the outer diameter of the heating cylinder 11 . A fitting protrusion 122b is provided on the inner surface of the heating cylinder holding hole 122 . The fitting protrusion 122b fits into a fitting hole 11b provided in the outer peripheral surface of the heating cylinder 11. As shown in FIG. The fitting hole 11b is provided at the central portion of the heating cylinder 11 in the vertical direction or at a portion above the central portion. That is, the slider 120 is attached to the central portion of the heating cylinder 11 in the vertical direction or a portion above the central portion. If it is possible to hold the heating cylinder 11 so as not to come off from the heating cylinder holding hole 122, the heating cylinder replacement jig 100 and the heating cylinder 11 may adopt a configuration in which the fitting protrusion 122b and the fitting hole 11b are omitted. may Four wheels 123 are provided and rotatably attached to the front, rear, left, and right portions of the slider body 121 . As indicated by the dotted line in FIG. 5, the guide post 113 is arranged between the two wheels 123 arranged in the longitudinal direction. The guide post 113 contacts the wheel 123 and guides the vertical movement of the slider 120 . The slider main body 121 is slid in the front-rear direction by running on the travel lane 112 with the wheels 123 . The slider body 121 has a bilaterally symmetrical shape and is configured to be separable into a left part 121A and a right part 121B. A handle 124 is attached to the front portion of the slider body 121 .

The lifting member 130 moves the heating cylinder 11 vertically. As shown in FIG. 10 and the like, the lifting member 130 has a shaft 131 and a table 132 . The shaft 131 is attached to the frame 110 with a screw structure. Specifically, the shaft 131 is screwed onto the nut member 114 of the frame 110 . A handle 133 for rotating the shaft 131 around its axis is attached to the lower end of the shaft 131 . The table 132 is attached to the upper end of the shaft 131 so as to be relatively rotatable with respect to the shaft 131 . The elevating member 130 is configured to move the table 132 vertically by turning the handle 133 to rotate the shaft 131 about its axis.

Next, an example of a heating cylinder exchanging method for exchanging the heating cylinder 11 using the heating cylinder exchanging jig 100 in the vertical injection molding machine 1 described above will be described with reference to FIGS. 6 to 16. FIG. 6 to 11, FIG. 12(a), FIG. 13, FIG. 14(a), FIG. 15 and FIG. 16 are views of the portion above the movable die plate 21 in the vertical injection molding machine 1 as seen from the right side. be. 12(b) and 14(b) are views of the heating cylinder 11 viewed from below. In FIGS. 6 to 16, for convenience of explanation, some members are shown in cross-sectional views or their descriptions are omitted.

Detachment of the heating cylinder 11 will be described.

The operator operates the operation section 32 to control the injection device driving section 15 and the screw driving section 16 by the control device 40 in the normal operation mode, and as shown in FIG. 14 are separated from each other by the normal operation maximum separation distance Dm, and the heating cylinder holding plate 13 is moved to the normal operation upper limit position Pm. At this time, the heating cylinder holding plate 13 and the screw holding plate 14 are at the retraction limit position in normal operation. An operator removes the cover of the injection device 10 to expose the heating cylinder holding plate 13 and the screw holding plate 14 . The operator removes the cover 24 of the base bracket 23 to expose the tip of the heating cylinder 11 . The operator removes the nozzle 11 a from the heating cylinder 11 . The operator removes the screw 12 from the screw holding plate 14 and extracts the screw 12 from the tip of the heating cylinder 11 .

Next, the operator operates the operation unit 32 to switch from the normal operation mode to the heating cylinder replacement mode. Then, the control device 40 controls the injection device drive section 15 and the screw drive section 16 to bring the heating cylinder holding plate 13 and the screw holding plate 14 closer to each other by the distance Dn when replacing the heating cylinder, as shown in FIG. The heating cylinder holding plate 13 is moved to the heating cylinder replacement upper limit position Pn. Then, the operator turns off the power of the vertical injection molding machine 1 .

Next, the operator places the frame 110 of the heating cylinder replacement jig 100 on the upper surface 21c of the movable die plate 21 and fixes the frame 110 to the movable die plate 21 with bolts, as shown in FIG. At this time, the central axis of the nut member 114 of the frame 110 and the central axis of the heating cylinder 11 are aligned.

Next, the worker attaches the slider 120 to the heating cylinder 11 as shown in FIG. Specifically, the heating cylinder 11 is sandwiched between the left part 121A and the right part 121B so that the heating cylinder 11 is disposed inside the heating cylinder holding hole 122, and the left part 121A and the right part 121B are joined with bolts and nuts. At this time, the fitting protrusion 122 b provided on the inner peripheral surface of the heating cylinder holding hole 122 is fitted into the fitting hole 11 b provided on the outer peripheral surface of the heating cylinder 11 . Thereby, the slider 120 is attached to the heating cylinder 11 . Also, the operator attaches the lifting member 130 to the frame 110 . Specifically, the operator screws the shaft 131 into the nut member 114 of the frame 110 and attaches the table 132 to the upper end of the shaft 131 .

Next, the operator attaches the handle 133 to the lower end of the shaft 131, as shown in FIG. Then, the operator rotates the handle 133 to rotate the shaft 131 around its axis, thereby moving the table 132 upward until it comes into contact with the lower end of the heating cylinder 11 .

Next, the operator removes the heating cylinder 11 from the heating cylinder holding plate 13 and places the heating cylinder 11 on the table 132 . The operator rotates the shaft 131 by rotating the handle 133 to move the table 132 downward until the slider 120 rests on the movement lane 112 of the frame 110, as shown in FIG. At this time, the guide post 113 is arranged between the wheels 123 arranged in the longitudinal direction of the slider 120 and guides the downward movement of the slider 120 . The operator pulls the handle 124 of the slider 120 forward to move the heating cylinder 11 forward together with the slider 120 . The operator attaches the eyebolt 150 to the proximal end of the heating cylinder 11 that has moved forward, and carries out the heating cylinder 11 using a crane (not shown).

Attachment of the heating cylinder 11 will be described.

The operator uses a crane (not shown) to carry in the heating cylinder 11 with the slider 120 attached thereto so that the slider 120 is placed on the movement lane 112 of the frame 110 . The operator pushes the handle 124 of the slider 120 backward to move the heating cylinder 11 together with the slider 120 backward. At this time, the central axis of the nut member 114 of the frame 110 and the central axis of the heating cylinder 11 are aligned. By rotating the handle 133 , the operator rotates the shaft 131 around its axis to move the table 132 upward until it comes into contact with the tip of the heating cylinder 11 . The operator further rotates the handle 133 to move the table 132 upward until the base end of the heating cylinder 11 reaches the mounting position of the heating cylinder holding plate 13 . At this time, the guide post 113 is arranged between the wheels 123 arranged in the longitudinal direction of the slider 120 and guides the upward movement of the slider 120 . The operator attaches the proximal end of the heating cylinder 11 to the heating cylinder holding plate 13 as shown in FIG. Also, the operator attaches the screw drop prevention jig 140 to the tip of the heating cylinder 11 . The screw fall prevention jig 140 has a band plate shape, and has a bolt hole at one end and a notch 140a hooked to a bolt at the other end. The screw drop prevention jig 140 is attached to the heating cylinder 11 so as to be rotatable around the bolt hole.

Next, the operator removes the lifting member 130 from the frame 110 . The operator turns on the power of the vertical injection molding machine 1 . The operator operates the operation unit 32 to switch from the heating cylinder replacement mode to the normal operation mode, controls the injection device drive unit 15 and the screw drive unit 16 by the control device 40, and heats as shown in FIG. The cylinder holding plate 13 and the screw holding plate 14 are separated by the normal operation maximum separation distance Dm, and the heating cylinder holding plate 13 is moved to the normal operation upper limit position Pm.

Next, the operator inserts the screw 12 from the tip of the heating cylinder 11 as shown in FIG. The operator rotates the screw drop prevention jig 140 and hooks the notch 140a on the bolt. Thereby, falling of the screw 12 can be prevented.

Next, as shown in FIG. 15, the operator inserts a columnar screw lifting jig 134 into the distal end portion of the heating cylinder 11 through the jig insertion hole 140b of the screw drop prevention jig 140, and lifts the lifting member 130. Attach to frame 110 .

Next, as shown in FIG. 16, the operator rotates the shaft 131 around the axis by rotating the handle 133 so that the table 132 and the screw lifting jig 134 are held together by the base end of the screw 12. It is moved upward until it reaches the mounting position of the plate 14 . An operator attaches the proximal end of the screw 12 to the screw holding plate 14 . An operator removes the frame 110 from the movable die plate 21 . The operator removes the screw drop prevention jig 140 from the tip of the heating cylinder 11 and attaches the nozzle 11 a to the tip of the heating cylinder 11 . The operator attaches the cover 24 of the base bracket 23 to cover the tip of the heating cylinder 11 . Then, the operator attaches a cover of the injection device 10 to cover the heating cylinder holding plate 13 and the screw holding plate 14 . Thus, the heating cylinder 11 in the vertical injection molding machine 1 is replaced.

As described above, the vertical injection molding machine 1 includes a heating cylinder 11 having a downward tip, a screw 12 accommodated in the heating cylinder 11, and a heating cylinder holding plate 13 to which the heating cylinder 11 is attached. , a screw holding plate 14 which is arranged above the heating cylinder holding plate 13 and to which the screw 12 is attached, an injection device driving section 15 which moves the heating cylinder holding plate 13 in the vertical direction, and a screw holding plate 14 which is connected to the heating cylinder holding plate. 13, and a control device 40 for controlling the injection device driving section 15 and the screw driving section 16. As shown in FIG. In the vertical injection molding machine 1, even when the heating cylinder holding plate 13 moves upward when the heating cylinder holding plate 13 and the screw holding plate 14 are separated by the maximum separation distance Dm during normal operation, the screw holding plate 14 The normal operation upper limit position Pm of the heating cylinder holding plate 13 is set so that the heating cylinder holding plate 13 does not collide with the connecting bracket 15b. Then, the control device 40 controls the normal operation mode in which the heating cylinder holding plate 13 is restricted from moving above the normal operation upper limit position Pm, and the heating cylinder holding plate 13 moves above the normal operation upper limit position Pm. and a heating cylinder exchange mode that allows With this configuration, when performing a normal operation such as a molding operation, it is possible to switch to the normal operation mode to avoid collision between the screw holding plate 14 and the connection bracket 15b. When replacing the heating cylinder 11, the mode is switched to the heating cylinder exchange mode, and the heating cylinder holding plate 13 can be moved upward from the normal operation upper limit position Pm while paying attention to the collision of the screw holding plate 14.例文帳に追加Therefore, it is possible to suppress an increase in the dimension of the vertical injection molding machine 1 in the height direction.

In addition, in the heating cylinder replacement mode, the controller 40 moves the heating cylinder holding plate 13 and the screw holding plate 14 closer to each other than the normal operation maximum separation distance Dm, and moves the heating cylinder holding plate 13 above the normal operation upper limit position Pm. The injection device driving section 15 and the screw driving section 16 are controlled so as to move to . By doing so, it is possible to suppress upward movement of the screw holding plate 14 when the heating cylinder holding plate 13 is moved upward when the heating cylinder 11 is replaced. Therefore, it is possible to suppress an increase in the dimension of the vertical injection molding machine 1 in the height direction.

The heating cylinder exchange jig 100 is attached to a frame 110 arranged below the heating cylinder holding plate 13 of the vertical injection molding machine 1, and is attached to the heating cylinder 11, and is provided horizontally on the frame 110. It has a slider 120 configured to be slidable on 112 and an elevating member 130 for moving the heating cylinder 11 in the vertical direction. A lifting member 130 has a shaft 131 attached to the frame 110 with a screw structure, and a table 132 attached to the upper end of the shaft 131 . The lifting member 130 is configured to move the table 132 vertically by rotating the shaft 131 about its axis. With this configuration, the heating cylinder 11 placed on the table 132 can be manually moved vertically by attaching the handle 133 to the shaft 131 of the elevating member 130 and rotating it. Also, the slider 120 allows the heating cylinder 11 to be easily moved in the horizontal direction. A hand-held electric drill may be used instead of the handle 133 to rotate the shaft 131 . By rotating the shaft 131 with the handle 133 or a hand-held electric drill, the operator can sensitively feel the change in the rotation load when the heating cylinder 11 collides with some member, and immediately rotate the shaft 131. can be stopped. Therefore, damage to the heating cylinder 11 can be suppressed.

Also, the slider 120 has a plurality of wheels 123 for traveling on the travel lane 112 . A frame 110 is arranged between a plurality of wheels 123 and has guide posts 113 that guide the vertical movement of the slider 120 . By doing so, it is possible to prevent the heating cylinder 11 from being tilted when the heating cylinder 11 is moved in the vertical direction.

Further, the slider 120 is attached to the central portion of the heating cylinder 11 in the vertical direction or to a portion above the central portion. By doing so, the posture of the heating cylinder 11 can be stabilized when the heating cylinder 11 is moved vertically or horizontally.

In addition, in the replacement work of the heating cylinder 11, the operator sets the control device 40 to the heating cylinder replacement mode. The heating cylinder holding plate 13 and the screw holding plate 14 are brought closer than the maximum separation distance Dm during normal operation, and the heating cylinder holding plate 13 is moved above the upper limit position Pm during normal operation. The frame 110 is arranged below the heating cylinder holding plate 13 of the vertical injection molding machine 1 . A slider 120 is attached to the heating cylinder 11 . The shaft 131 of the elevating member 130 is rotated around its axis to move the table 132 upward until it comes into contact with the tip of the heating cylinder 11 . The heating cylinder 11 is removed from the heating cylinder holding plate 13 and placed on the table 132 . The shaft 131 of the lifting member 130 is rotated around its axis to move the table 132 downward until the slider 120 is placed on the movement lane 112 . The slider 120 is slid on the movement lane 112 to horizontally move the heating cylinder 11 together with the slider 120 . With this configuration, the heating cylinder 11 can be easily replaced manually.

Although embodiments of the present invention have been described above, the present invention is not limited to these examples. Those skilled in the art can implement the invention in various other forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1... Vertical injection molding machine, 2... Upper mold, 3... Lower mold, 5... Base, 10... Injection apparatus, 11... Heating cylinder, 11a... Nozzle, 11b... Fitting hole, 12... Screw, DESCRIPTION OF SYMBOLS 13... Heating cylinder holding plate 14... Screw holding plate 15... Injection apparatus driving part 15a... Ball screw mechanism 15a1... Ball screw shaft 15a2... Nut body 16... Screw driving part 16a... Rotating member 20... Mold clamping device 21 Movable die plate 21a Lower surface 21b Through hole 21c Upper surface 22 Rotary table 22a Upper surface 23 Base bracket 24 Cover 30 Display operation device 31 Display Part 32 Operation unit 40 Control device 100 Heating cylinder replacement jig 110 Frame 111 Frame body 112 Movement lane 113 Guide post 114 Nut member 120 Slider 121 Slider main body 121A Left component 121B Right component 122 Heating cylinder holding hole 122b Fitting projection 123 Wheel 124 Handle 130 Elevating member 131 Shaft 132 Table 133 Handle 134 Jigs for lifting screws 140 Jigs for preventing screws from dropping 140a Notches 140b Jig insertion holes 150 Eyebolts Dm Maximum separation distance during normal operation Dn Distance when heating cylinder is replaced , Pm: Upper limit position during normal operation, Pn: Upper limit position during replacement of the heating cylinder

Claims (6)

A heating cylinder with a tip directed downward, a screw housed in the heating cylinder, a heating cylinder holding plate to which the heating cylinder is attached, and a heating cylinder holding plate disposed above the heating cylinder holding plate to which the screw is attached. a screw holding plate; an injection device driving section for vertically moving the heating cylinder holding plate; a screw driving section for vertically moving the screw holding plate with respect to the heating cylinder holding plate; and the injection device driving section. and a control device for controlling the screw drive unit, wherein
When the heating cylinder holding plate and the screw holding plate are separated by the maximum separation distance during normal operation, even when the heating cylinder holding plate moves upward, the screw holding plate is a component of the vertical injection molding machine. The upper limit position during normal operation of the heating cylinder holding plate is set so as not to collide with
a normal operation mode in which the control device restricts the movement of the heating cylinder holding plate above the normal operation upper limit position; A vertical injection molding machine, characterized by having an allowable heating cylinder exchange mode. In the heating cylinder replacement mode, the control device brings the heating cylinder holding plate and the screw holding plate closer to each other than the normal operation maximum separation distance, and raises the heating cylinder holding plate above the normal operation upper limit position. 2. The vertical injection molding machine of claim 1, wherein the injection unit drive and the screw drive are controlled to move. A heating cylinder replacement jig used when replacing a heating cylinder of a vertical injection molding machine,
a frame arranged below the heating cylinder holding plate of the vertical injection molding machine;
a slider attached to the heating cylinder and configured to be slidable on a movement lane provided horizontally on the frame;
a lifting member for moving the heating cylinder in the vertical direction,
The elevating member has a shaft attached to the frame with a screw structure and a table attached to the upper end of the shaft, and the table moves up and down by rotating the shaft around an axis. A heating cylinder replacement jig, characterized in that it is configured to The slider has a plurality of wheels for traveling on the lane for movement,
4. The heating cylinder replacement jig according to claim 3, wherein said frame is disposed between said plurality of wheels and has a guide post for guiding vertical movement of said slider. 5. The heating cylinder replacement jig according to claim 3, wherein said slider is attached to a center point in the vertical direction of said heating cylinder or a point above said center point. A heating cylinder with a tip directed downward, a screw housed in the heating cylinder, a heating cylinder holding plate to which the heating cylinder is attached, and a heating cylinder holding plate disposed above the heating cylinder holding plate to which the screw is attached. a screw holding plate; an injection device driving section for vertically moving the heating cylinder holding plate; a screw driving section for vertically moving the screw holding plate with respect to the heating cylinder holding plate; and the injection device driving section. and a control device for controlling the screw drive unit, a heating cylinder exchanging method for exchanging the heating cylinder using a heating cylinder exchanging jig in a vertical injection molding machine comprising:
In the vertical injection molding machine, when the heating cylinder holding plate and the screw holding plate are separated by the maximum separation distance during normal operation, even when the heating cylinder holding plate moves upward, the screw holding plate is The upper limit position during normal operation of the heating cylinder holding plate is set so as not to collide with the components of the vertical injection molding machine,
a normal operation mode in which the control device restricts the movement of the heating cylinder holding plate above the normal operation upper limit position; and a heating cylinder exchange mode that allows
The heating cylinder replacement jig has a frame, a slider configured to be slidable on a movement lane provided horizontally on the frame, and an elevating member for vertically moving the heating cylinder. , the elevating member has a shaft attached to the frame by a screw structure and a table attached to an upper end of the shaft, and the table is vertically moved by rotating the shaft around an axis. configured to move
The control device is switched to the heating cylinder exchange mode, the heating cylinder holding plate and the screw holding plate are brought closer than the normal operation maximum separation distance, and the heating cylinder holding plate is moved above the normal operation upper limit position. to the
disposing the frame below the heating cylinder holding plate of the vertical injection molding machine;
attaching the slider to the heating cylinder;
rotating the shaft of the elevating member around its axis to move the table upward until it abuts against the tip of the heating cylinder;
removing the heating cylinder from the heating cylinder holding plate and placing it on the table;
rotating the shaft of the elevating member about its axis to move the table downward until the slider is placed on the movement lane;
A method for exchanging heating cylinders, wherein the slider is slid on the lane for movement, and the heating cylinder is horizontally moved together with the slider.

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