JPS5989122A - Supporter for stabilizing body of bubble in inflation molding machine - Google Patents

Abstract

PURPOSE:To obtain the titled device, which blows up a melted resin positively and smoothly and varies the diameters of the bubbles, by each forming an outer cylinder, a circumferential surface thereof supports the stabilizing bodies of the bubbles, and an inner cylinder inserted into the outer cylinder at an interval in specific structure. CONSTITUTION:The hollow inner cylinder 50 is moved vertically and rotatably to the outer cylinder 40, and a plurality of air blow-off holes 42 are bored in the vicinity of the lower end 40a of the outer cylinder at intervals of equal angles. When a positioning pin 54 is connected to the upper end 40b of the outer cylinder and the inner cylinder 40 is positioned at an upper limit, the air blow-off ports 42 are communicated with an air supply port 11, and a pin 54 is connected into a L-shaped groove 43. When the inner cylinder 40 is positioned at a lower limit, a communication among the air blow-off ports 42 and the air supply port 11 is interrupted, and a direct inflow to a clearance S of air from the supply port 11 is prevented by a valve 55.

Description

[Detailed Description of the Invention] <Industrial Field> The present invention relates to an inflation molding machine that extrudes synthetic resin into a tube shape to form a bubble, folds the bubble flat, and passes it through a cooling liquid tank to form a tube strip of a predetermined width. The present invention relates to a pull stabilizer support device.

<Prior Art> Prior to this application, this type of bubble stabilizer support device had a single hollow tube 1, as shown in FIGS. 2 and 3.
0 is carved with a screw group 12 that screws into the air supply port 11 of the molding die of the inflation molding machine,
At the upper end, an opening 13 is provided for blowing out air into the nopuru 11, and near the lower end of the hollow tube 10, a hollow tube 1o is provided.
A plurality of air blow-off holes 16 are provided which communicate with an internal air passage 15 formed over the entire length of the air passage.

Prior to attaching and supporting the bubble stabilization support A to such a hollow tube 1o and performing inflation molding, the following preparatory work is performed.

That is, in order to guide the resin extruded from the resin discharge port of the molding die 1 as a bubble B to the nip roller 17 above, the upper end opening 13 of the hollow tube 10 attached to the air supply port 11 of the molding die is opened by hand (T). While blowing air from the air blowing hole 16 at the bottom, the molten resin F is extruded in an annular shape from the resin discharge port of the molding die, and the molten resin F is extruded along the bubble stabilization hole A.
After blowing up the molten resin and lifting its upper edge by hand to open the upper end opening 13 of the hollow tube 1o, at the point where the upper end of the hollow tube 1o is lifted, pinch the upper edge of the molten resin by hand and make it a closed end. Form bubble B. Next, the blower is started so that the diameter of this bubble B becomes a desired value, and air is supplied from the air supply port 11 of the molding die into the bubble B through the upper opening 13 of the hollow tube 1o, while blowing the bubble. Form and upper nip roller 1
7-1, and then guided to a winder 20 through a bubble breakage diameter detection device 18 and a cooling device 19. Next, the inflation molding machine is switched to continuous operation, and at this time, the folded diameter detection device 18 is turned on so that the diameter of the bubble 417 becomes the desired value.
The plow blower is started and stopped based on the detected value of σ inside bubble B)
The air pressure is adjusted according to the air supply/discharge date of the molding die, and a bubble with a desired folding diameter is molded.

Therefore, when blowing up the annular molten resin in the preparatory stage of continuous molding, the operator should cover the upper end opening 13 of the hollow tube 10 with one hand and blow the molten resin with the other hand. The hollow tube 1o must be lifted up to the upper end of the bubble B (this is a rather troublesome task, and at the time of transition from the above-mentioned blow-up operation to the continuous bubble operation), the hollow tube 1o must be lifted up into the bubble B.
Since the air discharged from the upper end opening 13 of o is also blown out from the lower air blowing hole 16, the air supplied inside the bubble can be used 100% effectively for setting the bubble fold diameter. pt2 is near the resin discharge port of the molding die. In the lower part of the bubble stable rest A, the bubble B is in the hollow tube 1o.
To solve the problem that the bubble expands abnormally to the outside without complying with the bubble diameter, which interferes with changing the bubble diameter and makes it difficult to obtain a bubble B with the desired diameter, the hollow tube is provided with a stabilizing break. Known bubble stabilizers include.

[1-1] This invention improves the drawbacks of the prior art and
This invention relates to a bubble stabilizer support device ffK in an inflation molding machine that can reliably blow away resin and smoothly change the diameter of bubbles.

For the purpose of this case, in an inflation molding machine dowel/mubble stabilizer support device, an outer cylinder with openings at the upper and lower ends that supports the bubble stabilizer on its circumferential surface, and an outer cylinder that is fitted with a gap in this outer cylinder. It consists of a hollow inner cylinder with a trench, and the lower end of the front outer cylinder faces the air supply port (11L) of the forming die, and near this lower end, there are multiple blow holes penetrating the outer cylinder peripheral wall. 11. In the center of the hollow inner cylinder, an air passage with vertical openings is provided along its entire length, and a manual cock for opening and closing this air passage is located at the upper end of the hollow inner cylinder that protrudes from the upper end of the outer cylinder. The air blowing hole of the outer cylinder is arranged in the gap with the air supply port of the molding die with which the lower end of the outer cylinder communicates.
I? Inflation is achieved by the present invention, characterized in that a valve that opens automatically is integrally provided at the lower end of the hollow inner cylinder.

Next, typical embodiments of the present invention will be described based on the drawings.

In FIGS. 4 and 5, reference numeral 30 denotes a bubble stabilizer support device, which supports the bubble stabilizer A on its circumferential surface;
The main components are an outer cylinder 40 with open upper and lower ends, and a hollow inner cylinder 50 that is fitted into the outer cylinder 40 with a gap S in between.

The hollow inner cylinder 50 is installed to be able to move up and down in the axial direction relative to the outer cylinder 40 and to be rotatable around the axis.

An air passage 51 with open upper and lower ends is formed in the center of this hollow inner cylinder 50. When the hollow inner cylinder 50 is at the n-1 upper limit position,
When the air passage 51 is closed and at the lower limit position, the air passage 51
A manual cock 52 for opening is provided at the upper end of the hollow inner cylinder 50 protruding from the upper end 40b of the outer cylinder 40.

On the other hand, the open lower end 40a of the outer cylinder 40 is connected to the air supply port 11 of the die of the two inflation molding machines. Male screw 4 screwed into
1 is engraved, and the lower end 40a communicates with the air supply (53) 1.1. Lower end 40a3 of this outer cylinder 40
77, air blowers 11 are placed at equal angular intervals on the peripheral wall of the outer cylinder head 0.
A plurality of 1 holes 42 are bored, and the opening of this outer cylinder 40 is ``1''.
”; into the hollow inner cylinder 50 in a pair of grooves 43 formed by cutting out the circumferential wall of the outer cylinder 40 in an I-shape from the end.

Said cook 5? Positioning bin 5 installed horizontally below the
4 is detachable at both ends.

When the positioning bin 54 is engaged with the upper end 40b of the outer cylinder 40 and the hollow inner cylinder 40 is positioned at the upper limit, the air outlet 42 is communicated with the air supply port 11, and the positioning bin 54 is connected to the upper end 40b of the outer cylinder 40.
4 falls into engagement with the L-shaped groove 43 of the outer cylinder 40, and when the hollow inner cylinder 40 is located at the lower limit, communication between the air outlet 42 and the air supply port 11 is cut off, and the air outlet 42 is closed. A valve 55 that opens into the gap S between the hollow inner cylinder 50 and the outer cylinder 40 is integrally provided at the lower end of the hollow inner cylinder 50.
The flange, which is formed by a flange extending around the entire outer periphery of the hollow inner cylinder 50, also has the function of preventing air from the air supply port 11 of the molding die from directly flowing into the gap S.

<Function> The function of the bubble stabilizer support device 30 of the present invention having the above configuration will be described below.

During molten resin blowing work, the hollow inner cylinder 50 is set at the upper limit position, and the valve 5. ! 5, only the air blowing hole 42 is communicated with the air supply port 11 of the molding die, and the hollow inner cylinder 50
The air passage 51 is closed by the action of the cock 52,
Blowing up the molten resin from the resin discharge port of the molding die, and using both hands, spread the molten resin evenly up the upper end of the hollow inner cylinder along the bubble stabilizing holes A installed at appropriate height positions around the outer cylinder 40. Pick it up.

In this state, place the positioning pin 54 of the hollow inner cylinder 50 into the outer cylinder 4.
The bottle 5 is dropped into the L-shaped groove 43 from the upper end of the bottle, rotates slightly around the axis, and the bottle 5 is inserted into the horizontal hole 43a of the groove 43.
4, the hollow inner cylinder 50 is set to the lower limit position, and the air blowing hole 42 is opened by the action of the valve 55. Outer cylinder 40 and hollow inner cylinder 50
The air passage 51 of the hollow inner cylinder 50 is opened by the action of the cock 52, and the air passage 51 of the hollow inner cylinder 50 is opened by the action of the cock 52.
All the air from the air supply port 11 should be discharged from the upper end of the hollow inner cylinder 50.

This hollow inner cylinder 50 is set at the lower limit fR (
Then, the tip of the molten resin that was blown up and picked up was closed.
and air passage 51ty+ of the hollow inner cylinder 50,
Next, continuous inflation molding is performed using air blown out from ψ1111 to adjust the bubble diameter to the desired value.
1. Same as before. At this time, the lower air outlet 43
Since the inside of the bubble B and the inside of the bubble B communicate with each other through the gap S, the internal pressure is the same as the internal pressure of the pull B. Near the air Suita hole 43, J
-'+1 The internal pressure of the bubble space between the stable body mounting position and the air supply k<1111 is maintained.

111 (During the subsequent inflation molding) When changing the pull fold diameter from time to time, air is discharged from the top 9; death/
/ S. Exhaust air from inside the bubble B through the molding die to change the bubble fold diameter. At this time, 50 yen per tube in the evening
Air supplied from the direct molding die does not flow into or out of the air blowing hole 43 of the molding die.

<effect> The present invention configured and operated as described above has the following effects.

Not only during the transition from bubble blowing to continuous molding, but also when changing the bubble fold diameter, all the air supplied from the air supply port 11 of the molding die to the bubble stabilizer support device 30 is supplied to the hollow inner cylinder 50. Air can be blown into the puzzle B through the air passage 51 through the air blowing hole 4 provided at the bottom of the outer cylinder 50.
3, no ejection occurs at all, and when changing to a larger diameter bubble, the bubble force 1°' located between the bubble stabilizer A and the air supply port 11 of the molding die expands outward in an irregular shape, and the puzzle diameter The bubble folding diameter can be smoothly changed to a larger diameter without causing any hindrance to changing the diameter of the bubble, and even when changing to a smaller diameter bubble, the air blowing hole 43 of the outer cylinder 40 can blow the bubble B through the gap S. Since it communicates with the inside and has equal pressure, it is pushed by external pressure.
Since the bubble B does not come into close contact with the zero circumferential surface, the frictional force between the outer cylinder 40 and the bubble B increases due to this close contact, and it is possible to eliminate the fear that the bubble B will break when the bubble B is taken out.

When blowing up a bubble, the air passage 51 can be closed by the action of the cock 52, so there is no need to close the upper end of the hollow inner cylinder 4 () with your hands as in the conventional case, and the bubble can be blown up using both hands. Uniformly lift the upper end of the molten resin,
can be guided upwards.

When the bubble stabilizer support device 30 of the present invention, which performs continuous bubble formation as described above, is used together with a cooling ring that cools the outer peripheral surface of the bubble, the bubble The above-mentioned "Sea urchin support device 3"
The bubble can be cooled from the inside and outside by air circulating inside the bubble and air from the cooling ring without causing abnormal expansion at the bottom of the bubble.

<Effects of the Embodiment> If the knob 53 of the cock 52 closes the VC air passage 51' when it is horizontal and opens the air passage 51 when it is vertical, the position of the hook knob 53 and the positioning bottle can be adjusted. 54 and the L-shaped groove 43, it can be determined at a glance from the outside of the bubble B whether or not the bubble stabilizer support ft30 is set for continuous molding, thereby preventing defective molding of the puzzle. can be prevented from occurring.

The horizontal hole 43a of this L-shaped groove 43 and the positioning pin 54
During continuous bubble forming, the upward air passage 51
The air pressure passing through can prevent the hollow inner cylinder 50 from moving away from the 100-degree position.

The hollow inner cylinder 50 of the embodiment described above is equipped to be able to move vertically and rotate freely, but the valve 55 at the lower end of the hollow inner cylinder 50 is formed in a rotary type, and the hollow inner cylinder 50 is rotated by its axis. move,
The structure of communicating and disconnecting the air outlet 43 with the air supply port 11 is also the same in this invention.

[Brief explanation of the drawing]

The figures relate to the present invention, and Fig. 1 shows a schematic diagram of an inflation molding machine, and Fig. 2 shows a process of performing V-pull blowing using a hollow tube, which is a conventional bubble stabilizer support device. FIG. 3 is a diagram illustrating a state in which the upper end of the melting (σ1 fat is closed) using a hollow tube similar to FIG. 2, and FIG. FIG.
It is a figure which shows the state in which bubbles are continuously formed by the bubble stabilizer support device of a figure. Explanation of main symbols in the figure 11...Air supply port, 30...Bubble stabilizer support device, 4()...Outer cylinder, 43...Air blowing hole, 50...
...Hollow inner cylinder, 51...Air passage.

Claims (1)

[Claims] (1) A bubble stabilizer support device used in an inflation molding machine includes an outer cylinder with openings at the upper and lower ends that supports the bubble stabilizer on its circumferential surface, and an outer cylinder that is fitted into the outer cylinder with a gap. The lower end of the outer cylinder communicates with the air supply port of the molding die, and near this lower end, a plurality of air blowing holes are provided that penetrate the peripheral wall of the outer cylinder. A manual cock for opening and closing this air passage is provided at the upper end of the hollow inner cylinder that protrudes from the upper end of the outer cylinder. A valve is integrally provided at the lower end of the hollow inner cylinder to selectively open an air blowing hole to the air supply port of the molding die with which the lower end of the outer cylinder communicates with the gap.(2) The hollow inner cylinder moves up and down. The air outlet is connected to the air supply port at the upper limit position, and the communication is connected to the air supply port at the lower limit position.
1. Place the air outlet between the outer cylinder and the hollow inner cylinder. 17 in the picture
1. The flange to be opened is a valve at the lower end of the hollow inner cylinder. A no-pull stabilizing support device in an inflation molding machine according to claim 1, which is integrally provided with the blow molding machine. ) The hollow inner cylinder is placed vertically by 1β river between the first position and the second position, and the hollow inner cylinder is installed at a cock F position across the axis of the hollow inner cylinder. The positioning pin is located in an L-shaped groove cut out from the upper end of the outer cylinder, and is easily removable.
In the inflation molding machine according to Claim 2 JJ'4] NII body support J.J-1. (11) The hollow inner cylinder is that U? Z> Bubble stabilizer support device in the inflation molding machine described in Disciple 1JA according to claim 11, which rotates around the I+ line, and the 6:I valve is a no-pull that can freely rotate back and forth.