JPS6121217Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container forming apparatus provided with a bottom deburring mechanism.

Generally, hollow containers are made by holding a parison discharged from an extruder between split molds, making one end of the parison the mouth of the container and the other end the bottom of the container, and blowing pressurized air through the mouth to form the container. It is made by. When the parison discharged from the extruder is clamped between the split molds, burrs are generated at the surface where the split molds meet at the bottom of the container. This burr can be removed by hand by a worker after the container is cooled and taken out from the split mold, but it takes a large number of workers and a large amount of space to remove the burr in response to the manufacturing capacity of the molding equipment. Requires work space. For this reason, it is necessary to install a burr removal device in which the cutter swings or moves up and down using a cylinder at the position where the bottom of each split container is formed, or to install a device to clamp the burr, and remove the burr by pulling or twisting the burr. is being attempted. However, the structure of the deburring device is complicated, which causes trouble during operation, and the structure of the device must be made robust in order to install the deburring device, which increases the size of the entire device and increases the price. It was hot. In addition, since the deburring device must be rotated at any time in addition to the split molds, it consumes a lot of power and has the disadvantage of increasing running costs.

The present invention solves the above-mentioned drawbacks and provides a container molding device that is simple in construction and capable of reliably deburring the bottom of the container.

That is, the present invention consists of a shaft rotatably provided on the machine frame, a vertical plate fixed to the shaft, and at least one set of split molds arranged around the vertical plate, and the split molds are rotated. The steps of supplying the parison to the split mold while supplying the parison, supplying pressurized air into the parison to form the container, cooling the container in the split mold, and releasing the container from the split mold are sequentially moved. In an apparatus for molding a container, in the process of releasing the container from the split molds, the container is located between the molds in the rotation passage area of the split molds and when the split molds are opened by a predetermined amount, and is inside the split molds. To provide a container forming device capable of reliably removing burrs before the container is released from a split mold in which a deburring blade that contacts bottom burrs of the container is attached to a machine frame.

Fig. 1 shows a schematic front view of the container forming device, Fig. 2 shows a side view, Fig. 3 shows a schematic front view of the deburring device, and Fig. 4 shows a side view, and the configuration will be explained based on the drawings. .

1 is a machine frame, and 2 is a bearing provided on the machine frame. 3 is a shaft attached to the bearing, and vertical plates 4 and 5 are fixed thereto. Reference numeral 6 denotes a shaft provided between the vertical plates 4 and 5, and a sliding body to which split molds 9 and 10 are respectively fixed is movably mounted. The split molds 9, 10
A refrigerant circulation passage is provided to cool the container in the mold. 11 is a sliding body that moves along a guide provided on the vertical plate 4, and a cam floor 12 is attached thereto. 13 is a link mechanism that converts the vertical motion of the sliding body 11 into horizontal motion and transmits it to the sliding body 7. 14 is a shaft connected to the sliding body 11 via the sliding body 7, and 15 is a link mechanism that moves the sliding body 8 in a direction opposite to the moving direction of the shaft.

The sliding bodies 7 and 8 are moved in opposite directions by the link mechanisms to open and close the split mold. 16 is machine frame 1
The cam floor 12 engages with a guide groove provided in the cam, moves the sliding body 11 in the axial direction, and moves the sliding body 7 in the horizontal direction via the link mechanism 13. 17 is a pressurized air supply device for blowing compressed air into the parison held between the split molds 9 and 10. Reference numeral 18 denotes a deburring device installed in the area where the container in the split mold is discharged, and includes a bracket 19 provided on the machine frame 1, a shaft 20 provided on the bracket 19, and an arm rotatably provided on the shaft 20. 21, and a deburring blade 22 fixed to the arm 21 with a bolt 23.
and the amount of rotation of the shaft 24 provided on the bracket 19, the pin 25 protruding from the arm 21, the spring 26 stretched between the shaft 24 and the pin 25, and the arm 21 provided on the bracket 19. It consists of adjusting bolts 27 and the like. 28 is a drive device for rotating the shaft 3, 29 is a sprocket wheel fixed to the output shaft of the drive device 28, and 31 is a chain stretched between the sprocket wheels 29, 30. 32 is an extruder that continuously discharges the parison P.

The container forming operation in the container forming apparatus having the above configuration will be explained.

First, the drive device 28 is started to rotate the vertical plates 4, 5 and the split molds 9, 10 together with the shaft 3. The split mold 9,
10 comes to the container discharge area, the cam floor 12 engaged with the guide groove of the cam 16 and the sliding body 11 move in the axial direction, and the sliding body 7 is moved to the vertical plate 4 by the link mechanism 13.
Move to the side. The shaft 14 moves together with the slider 7, and the link mechanism 15 moves the slider 8 toward the vertical plate 5 to open the split molds 9 and 10.

Simultaneously with the above operation, the extruder 32 is operated to discharge the parison P. With the parison P discharged for a predetermined length, the open split mold rotates, and when it reaches the parison discharge position, the sliding body 11 is moved to the outside of the vertical plate 4 by the guide groove of the cam 16, and the link The mechanism 13 moves the sliding body 7 toward the vertical plate 5.
The shaft 14 moves together with the sliding body 7, and the link mechanism 15
As a result, the sliding body 8 moves toward the vertical plate 4 side, and the split mold 9,
10 is closed, the parison P is held, and unnecessary parts are cut off using a parison cutter (not shown). Immediately after the split mold holds the parison P, the pressurized air supply device 1
7 operates to blow compressed air into the parison P. When compressed air is blown into the parison, the parison expands to form a container. Cooling water is circulated in the container B while the container is being formed and the split mold is rotating. Cool and solidify in the split mold. When the container in the split mold is cooled and solidified and moved to the discharge area of the container, the cam floor 12 engaged with the guide groove of the cam 16 and the sliding body 11 move in the axial direction, and the sliding body 7 is moved by the link mechanism 13. moves to the vertical plate 4 side. The shaft 14 moves together with the sliding body 7, and the sliding body 8 is moved toward the vertical plate 5 by the link mechanism 15, opening the split molds 9 and 10 by a distance h that allows the insertion of the deburring blade 22 of the deburring device 18. . When the split molds 9 and 10 rotate in this state, the burr removing blade 22 comes into contact with the burr T on the bottom of the container B in the split molds 9 and 10. When the split molds 9 and 10 further rotate, the burr T is pulled by the split mold and the blade, and a tensile force acts on the root of the burr T, thereby removing the burr T. During the deburring operation, the split molds 9 and 10 are opened only to a size h that allows the blade 22 to be inserted, so that the container B does not move or tilt abnormally in the mold, and deburring can be performed reliably. When the burr T of the container B is removed, the split molds 9 and 10 are gradually opened and the container B is released from the mold.
The split molds 9 and 10 from which the containers have been released are moved to the parison supply section in an open state to complete the container manufacturing cycle. Since multiple sets of split molds are attached to the vertical plates 4 and 5, the parison P discharged from the extruder
is successively clamped and cut into split molds, and the above-mentioned operations are performed to continuously form containers.

Although the present invention can be implemented as described above, it is not limited to the embodiments.

The opening/closing movement of the split mold may be constructed by a cam having a guide groove in the radial direction of the shaft center, a link mechanism, etc. as in the embodiment, or a cam having a guide groove in the longitudinal direction of the shaft center,
The split mold may be opened and closed using a spring or the like that always presses the split mold in a fixed direction, or a fluid cylinder may be used to open and close the split mold.

Although the deburring blade may be directly fixed to the bracket, it is preferable to have the blade attached to the rotating arm as in the embodiment. The pressing force of the deburring blade that contacts the burr may be adjusted by a spring stretched between the bracket and the rotating arm.

In order to accommodate changes in the size and shape of the container, it is preferable that the length of the deburring blade is adjustable by using elongated holes or multiple holes.

The deburring blade may be a simple thin plate, but the burr contacting surface should have projections and depressions for catching (Fig. 5), or
Alternatively, a burr engaging groove (FIG. 6) may be provided to securely hold the burr. A considerable number of air limit switches are arranged on the vertical plate 4 at different radii to control the timing of blowing compressed air into the parison, the insertion and removal of the blowing needle for the blowing, and the opening and closing of the valves in the compressed air supply circuit of the deburring device. At the same time, a dog corresponding to each air limit switch is provided on the machine frame facing this so as to be adjustable in the circumferential direction, so that each operation is performed sequentially. An electric switch may be used instead of the air limit switch. As mentioned above, in the process of discharging a container from the split molds of a container molding device, the present invention provides a method for discharging containers from the split molds in the rotation passage area of the split molds and when the split molds are opened by a predetermined amount. By attaching a deburring blade to the machine frame that contacts the burrs at the bottom of the container inside, it is possible to reliably remove burrs with a simple device before the container is released from the split mold, and also to improve the size and shape of the container to be formed. Even if the deburring blade is changed, it can be easily handled by simply adjusting the mounting position of the deburring blade.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing one embodiment of the container forming apparatus of the present invention, and FIG. 2 is a side view. FIG. 3 is a schematic front view showing one embodiment of the deburring device, and FIG. 4 is a side view. FIG. 5 is a schematic perspective view showing one embodiment of the deburring blade;
The figure is a schematic perspective view showing another embodiment. 1: Machine frame, 3, 6, 14, 20, 24: Axis,
4, 5: Vertical plate, 7, 8, 11: Sliding body, 9, 1
0: Split mold, 12: Cam floor, 13, 15: Link mechanism, 16: Cam, 17: Pressure air supply device, 18: Deburring device, 19: Bracket, 2
1: Arm, 22: Deburring blade, 23, 27:
Bolt, 25: Pin, 26: Spring, 28:
Drive device, 29, 30: Sprocket foil, 3
1: Chain, 32: Extruder.

Claims (1)

[Scope of utility model registration request] It consists of a shaft rotatably provided on the machine frame, a vertical plate fixed to the shaft, and at least one set of split molds arranged around the vertical plate, and the parison is formed into the split molds while rotating the split molds. A device for forming a container by sequentially moving the steps of supplying pressure fluid into the parison, forming a container by supplying pressure fluid into the parison, cooling the container in the split mold, and releasing the container from the split mold. In the step of releasing the container from the split mold, a burr on the bottom of the container located between the molds and inside the split mold is removed in the rotation passage area of the split mold and when the split mold opens by a predetermined amount. A container forming device characterized in that a deburring blade that comes into contact with the machine frame is attached to the machine frame.