JP2006297863A - Vertical injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the workability of an operator at the time of insert molding or the workability at the time of replacement of a mold from the front side of a machine in a vertical injection molding machine of a type for moving a movable die plate having a movable mold attached on its undersurface side up and down with respect to a fixed die plate having a fixed mold attached on its upper surface side. <P>SOLUTION: In the vertical injection molding machine constituted so that the movable die plate having a movable mold attached on its undersurface side is moved up and down with respect to the fixed die plate having a fixed mold attached on its upper surface side and a slidable safety door is provided to the front of a space where the movable die plate is moved up and down with respect to the fixed die plate, a rail member is fixed to the lower end of the safety door and locked with a rail sliding guide member having the rail member fixed and arranged thereto to slide the safety door. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vertical (vertical) injection molding machine in which a movable die plate having a movable die attached to a lower surface thereof moves up and down with respect to a fixed die plate having a fixed die attached to an upper surface thereof. .

  In an injection molding machine, a slidable safety door is provided in front of a mold opening / closing space where a movable die plate mounted with a movable mold is reciprocated. When the mold is opened, the mold opening / closing operation is prohibited in order to avoid the danger that the operator (operator) may pinch his hand between the molds. In the vertical injection molding machine, naturally, a slidable safety door is provided in front of the mold opening / closing space.

  This safety door slide mechanism usually has a rail member laid (fixed) on the machine frame, and a pulley that rotates on the rail member is attached to the lower end of the safety door, or the safety door In general, a linear motion guide having a ball that rolls and circulates on the rail member is attached to the lower end of the rail.

  By the way, in the vertical injection molding machine of the type in which the movable die plate with the movable side mold attached to the lower surface side thereof moves up and down with respect to the fixed die plate with the fixed side die attached to the upper surface side, the fixed side Since the upper surface (release surface) of the mold is horizontal, an insert article at the time of insert molding can be easily placed and positioned on the upper surface side of the fixed mold, and thus is often used for insert molding. In this insert molding, the machine (vertical injection molding machine) is set to the semi-automatic operation mode, and at the timing when the mold opening / closing mechanism is temporarily stopped after the mold opening / ejecting for each molding cycle, A machine operation method is often employed in which a standing operator opens a safety door, takes out an insert molded product, and then places and positions an insert article for the next shot on the upper surface of a fixed mold.

  However, in the conventional vertical injection molding machine of this type, since the rail member exists as a protrusion on the machine frame on the front side of the machine when the safety door is opened, the above-mentioned insert molded product is taken out. In addition, it was pointed out that workability was hindered when loading insert articles. In addition, it was pointed out that the presence of the rail member deteriorated workability even when the safety door on the front of the machine was opened and the mold was changed from the front side of the machine.

  The present invention has been made in view of the above points. The object of the present invention is to provide a movable die having a movable die attached to the lower surface thereof with respect to a fixed die plate having a fixed die attached to the upper surface thereof. In a vertical injection molding machine of a type in which a die plate moves up and down, it is intended to improve the workability of an operator at the time of insert molding and the workability at the time of changing a die from the front side of the machine.

  In order to achieve the above-described object, the present invention achieves a movable die plate in which a movable die plate having a movable die attached to its lower surface moves up and down relative to a fixed die plate having a fixed die attached to its upper surface. In a vertical injection molding machine provided with a slidable safety door in front of the space where the plate moves up and down with respect to the fixed die plate, the rail member is fixed to the lower end of the safety door, and the rail member is fixedly arranged. The safety door is configured to be slidable by engaging with the rail sliding guide member.

  According to the present invention, the rail member is fixed to the lower end of the safety door, and the rail member is integrated with the safety door to be slid and moved. Since there is no rail member that becomes a projection on the front side of the machine as in the past, it is possible to improve the workability of the operator during insert molding and the workability when exchanging dies from the front side of the machine. it can. In addition, since the concave part is formed on the front side (front side) of the fixed die plate that also serves as a part of the machine frame, the operator's trunk part partially enters the concave part when the safety door is fully opened. In this respect, workability at the time of insert molding or mold maintenance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 relate to a vertical injection molding machine according to an embodiment of the present invention (hereinafter referred to as the present embodiment), and FIG. 1 illustrates a mold opening / closing system mechanism of the vertical injection molding machine of the present embodiment. FIG. 2 is a perspective view of a main part with a part of the cover removed, and FIG. 2 is a perspective view of the main part showing a mold opening / closing system mechanism of the vertical injection molding machine according to the present embodiment, viewed from an angle different from FIG. It is.

  1 and 2, reference numeral 1 denotes a machine frame as a structure for holding the entire machine. The machine frame 1 is erected on the base frame 2 located at the bottom and the front side (front side) of the base frame 2. -Two fixed front columns 3, a rear support frame 4 erected and fixed on the rear side (back side) of the base frame 2, and a fixed die fixed to the front columns 3 and the rear support frame 4. The plate 5 includes two corner support frames 6 that are erected and fixed at the front corner of the fixed die plate 5.

  In the present embodiment, the fixed die plate 5 also serves as a part of the machine frame 1, and the upper surface of the fixed die plate 5 is formed flush. A fixed mold (not shown) is attached to the upper surface of the fixed die plate 5. The reason why the upper surface of the fixed die plate 5 is flush is to improve workability at the time of die replacement.

  A tail stock 7 is provided so as to be movable up and down. A servo motor 8 for opening and closing the mold is mounted on the tail stock 7. Reference numeral 9 denotes four tie bars having one end fixed to the tail stock 7 and the other end fixed to a movable die plate 10 that can move up and down. The tie bar 9 allows the tail stock 7 and the movable die plate 10 to be integrated. The tie bars 9 are inserted so as to be slidable in the vertical direction with respect to the fixed die plate 5. A movable mold (not shown) is attached to the lower surface of the movable die plate 10. 11 is a known toggle link mechanism provided between the lower surface side of the fixed die plate 5 and the upper surface side of the tail stock 7, and a crosshead (not shown) that is an input end of the force of the toggle link mechanism 11 is The mold opening / closing servomotor 8 is driven in a vertical direction by a ball screw mechanism (not shown) that converts the rotation of the servomotor 8 into a linear motion, so that it is driven to be folded or extended.

  In the present embodiment, when the toggle link mechanism 11 is extended and driven, the tail stock 7 is driven downward with respect to the fixed die plate 5, and the tie bar 9 and the movable die plate 10 are lowered integrally with the fixed die plate 5. Closing and mold clamping are performed. When the toggle link mechanism 11 is driven to be folded, the tail stock 7 is driven to rise with respect to the fixed die plate 5, and the tie bar 9 and the movable die plate 10 are raised together with the tail stock 7 to perform mold opening. It has come to be. Although not shown, an injection system mechanism is mounted on the upper surface side of the movable die plate 10, and the injection system mechanism moves up and down integrally with the movable die plate 10.

  As shown in FIG. 2, the space below the fixed die plate 5 is covered by the rear support frame 4 and a cover 12 that covers the front and left and right side surfaces. As shown in FIGS. 1 and 2, a sliding door type safety door that is slidable is located in front of a mold opening / closing space (a space above the fixed die plate 5) in which the movable die plate 10 moves up and down. 13 are provided on the right side and the left side of the mold opening / closing space (the space above the fixed die plate 5). During the molding operation in the automatic operation mode or the semi-automatic operation mode, basically, when any one of these safety doors is opened, the mold opening / closing operation is prohibited. However, in the present embodiment, when the hoop material is stepped by one shot in the mold open state, the hoop material is continuously and automatically supplied between the molds, and when the insert molding using the hoop material is performed, the right side surface The operator can also set the machine control conditions so that the mold can be opened and closed even when the safety doors 14 and 15 on the left side are opened.

  In this embodiment, the slidable safety door 13 on the front side of the machine, on which the machine operator stands, has a rail member 16 fixed integrally at the lower end thereof, and this rail member 16 is connected to the front side of the fixed die plate 5. A linear guide 17 fixedly arranged on the left side of the side surface (front side surface) is engaged so as to be slidable. The linear motion guide 17 is a member that incorporates a ball that rolls and circulates on the rail member 16. By using the linear motion guide 17 that incorporates such a circulating ball, the safety door 13 can be smoothly slid. It can guarantee movement and long life and durable sliding motion. A sliding bush 18 is fixed on the upper side of the safety door 13, and the sliding bush 18 slides along a guide bar 19 spanned between the upper ends of the two corner support frames 6. It is configured as such. Although not shown in the drawing, the safety door 13 is provided with a stopper that defines the maximum opening position.

  By adopting the sliding movement mechanism of the safety door 13 as described above, when the safety door 13 is opened, there is no rail member that becomes a projection on the front side of the machine after being opened. Therefore, it is possible to improve the workability of the operator at the time of insert molding and the workability at the time of changing the mold from the front side of the machine.

  FIG. 3 is an explanatory view of the safety door 13 as viewed from above, and FIG. 4 is an explanatory view of the safety door 13 as viewed from the right side. As shown in FIG. 4, the rail member 16 is attached to the lower end of the safety door 13 on the back side of the safety door 13. As shown in FIG. 3, a concave portion 20 is formed on the front side surface (front side surface) of the fixed die plate 5. When the safety door 13 is fully opened, this concave portion 20 is a trunk portion of the operator. Is provided in order to allow entry, although it is a little, so that the workability of the operator during insert molding can be improved.

  Next, in the vertical injection molding machine of the present embodiment, the operation when performing insert molding in the semi-automatic operation mode will be described. In this semi-automatic operation mode, the operation of the mold opening / closing system mechanism is temporarily stopped when the operation of ejecting the insert-molded product from the fixed mold (not shown) by the unillustrated eject mechanism executed after the mold opening is completed. Then, the operator who recognizes the completion of the eject operation by lighting the lamp or the like opens the safety door 13. Then, the operator takes out the insert-molded product released from the fixed mold (not shown) by the eject operation, and then places and positions the next shot insert article on the upper surface of the fixed mold. Thereafter, the operator closes the safety door 13, and the machine that recognizes the safety door 13 automatically starts the mold closing / clamping operation. When the predetermined injection start timing is reached after the mold clamping is completed, the molten resin is injected into the mold clamped from the nozzle of the injection system mechanism (not shown) mounted on the upper side of the movable die plate 6. Filled. Thereafter, after a predetermined solidification / cooling period, mold opening is performed, and then an eject operation is performed. After the completion of the eject operation, the same operation as described above is repeated.

It is a principal part perspective view in the state where a part of cover was removed showing a mold opening-and-closing system mechanism of a vertical injection molding machine concerning one embodiment of the present invention. It is the principal part perspective view seen from the angle different from FIG. 1 which shows the type | mold opening-closing system mechanism of the vertical injection molding machine which concerns on one Embodiment of this invention. It is explanatory drawing which looked at the slidable safety door from the upper surface in the vertical injection molding machine which concerns on one Embodiment of this invention. It is explanatory drawing which looked at the slidable safety door from the right side surface in the vertical injection molding machine which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine frame 2 Base frame 3 Front side support | pillar 4 Back side support frame 5 Fixed die plate 6 Corner support frame 7 Tail stock 8 Servo motor for mold opening / closing 9 Tie bar 10 Movable die plate 11 Toggle link mechanism 12 Cover 13 Sliding sliding door Type safety doors 14 and 15 Drawer rotation type safety doors 16 Rail members 17 Linear motion guides 18 Sliding bushes 19 Guide bars 20 Recesses

Claims (4)

A movable die plate with a movable die attached to its lower surface moves up and down relative to a fixed die plate with a fixed die attached to its upper surface, and the movable die plate moves up and down with respect to the fixed die plate. In a vertical injection molding machine with a slidable safety door in front of the moving space,
A vertical injection molding characterized in that a rail member is fixed to a lower end of the safety door, and the rail member is engaged with a rail sliding guide member fixedly arranged so that the safety door can be slid. Machine. In the vertical injection molding machine according to claim 1,
2. The vertical injection molding machine according to claim 1, wherein the rail sliding guide member is fixedly arranged on a left side of a front side surface (front side surface) of the fixed die plate that also serves as a part of a machine frame. In the vertical injection molding machine according to claim 2,
A vertical injection molding machine, wherein an upper surface of the fixed die plate which also serves as a part of the machine frame is flush. In the vertical injection molding machine according to claim 2,
A vertical injection molding machine, wherein a concave portion is formed on a front side surface (front side surface) of the fixed die plate that also serves as a part of the machine frame.

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