JP2000167913A - Method and apparatus for molding and filling hollow molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a molding cycle by molding the molding, then transferring it to a liquid filling unit by a first molding conveyor, filling liquid, transferring it to a sealing unit by a second molding conveyor, and sealing a filling port. SOLUTION: After a molding 24 is molded, the molding 24 is hung down at a molding conveying position C by a clamp 23 of a first molding conveyor 7, and conveyed to a filling position D. Here, the molding 24 is held by a holder 20 of a second molding conveyor 18, a filling nozzle 14 of a liquid filling unit 15 is lowered, inserted into a filling port of the molding 24, and filled with a filling liquid. Then, the holder 20 is moved to a heat sealing position E by a driver 19 to remove a flash of the filled molding 26, and a heat sealing tool 16 of a heat sealing unit 17 is lowered to melt and seal the port. Thus, molding and filling steps of the molding are divided into three stations, thereby improving productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for molding and filling a hollow molded article.

[0002]

2. Description of the Related Art Conventionally, for forming and filling a hollow molded product, for example, a hollow molding machine shown in FIG. 6 has been employed.

As shown in FIG. 1, a crosshead 2 is provided at the tip of an extruder 1, and a parison cutting cutter 4 for cutting a parison 3 discharged from the crosshead 2 is provided immediately below the crosshead 2. Is provided. In parallel with the cross head 2, an air blowing / filling nozzle 30
And a heat sealing device 17 having a heat sealing device 16 are provided on the molding machine frame 8.

Below the crosshead 2 and the air blowing / filling nozzle 30, the die transfer device 9 reciprocates between the parison receiving position A 'and the air blowing / liquid filling position B' to open and close the die 10. A mold clamping device 11 is provided. An air blowing / liquid filling position B ′ is provided on a side portion (right side in the figure) of the mold clamping device 11 by reciprocation of the mold clamping device 11.
And a heat-sealing position C ', and a filled molded product holding device 32 that reciprocates between the heat-sealed positions C' is attached.

Next, the molding operation will be described with reference to FIGS.
This will be described with reference to FIGS. (A, b) The parison 3 hanging from the crosshead 2 at the parison receiving position A ′ is sandwiched between the molds 10 and cut by the parison cutting cutter 4. (C) The mold 10 is moved to the air blowing / liquid filling position B ', and the air blowing / filling nozzle 30 for performing both air blowing and liquid filling is inserted into the parison 3 from above.
The molded product (container) 24 is molded by blowing air. (D) When the molded product 24 is cooled by the mold 10 and properly hardened and no longer deforms, blowing air (pressurized air)
While filling, the filling liquid (25) is filled from the inserted nozzle 30.

After the filling is completed, the mold 10 is opened, and the mold 10 is moved to the parison receiving position A 'in order to form the next molded product. At this time, since the filled molded article holding device 32 is connected to the mold 10, it moves to the air blowing / liquid filling position B '. (E) The filled product 26 suspended from the air blowing / filling nozzle 30 is held by the holder 32 a of the filled product holding device 32 in accordance with the closing operation of the mold 10.
After that, the nozzle 30 moves upward to fill the molded product 2.
Exit from 6.

Next, the mold 10 moves to the air blowing / liquid filling position B ', and in conjunction therewith, the filled molded article holding device 3
2 moves to the heat sealing position C ', so that the holder 3
The filled molded product 26 held in 2a also moves to the heat sealing position C '. At the heat sealing position C ', the filled molded product 26
And the filling port 24a is cut to a length that can be heat-sealed. (F) Next, the heat sealing device 1 of the heat sealing device 17
6 is lowered and pressed against the filling port 24a, and a part of the filling port 24a is melted to seal the filling liquid 25 so as not to leak. (G) Next, in conjunction with the opening of the mold 10, the holder 3 is opened.
2a is opened, and the filled molded article 26 having the heat seal portion 26a is taken out.

[0008]

In the conventional blow molding machine, the molding, filling, deburring and heat sealing are performed in a lump in the machine so that the required time is accumulated in one cycle. It takes a long time for molding,
Productivity did not increase. That is, the production was performed without being able to fully utilize the capabilities of the hollow molding machine.

[0009] It is an object of the present invention to improve the productivity of an apparatus for molding and filling a hollow molded article.

[0010]

According to the method of molding and filling a hollow molded article according to the present invention, a molded article is molded by a hollow molding machine and then molded by a first molded article conveying device into a liquid filling device adjacent to the outside of the machine. After the article is transferred and filled with liquid, and further transferred to the sealing device by the second molded article transfer device, the filling port is sealed.

Further, the apparatus for molding and filling a hollow molded product according to the present invention comprises an extruder for discharging a parison between dies, an air blowing device for blowing air into the parison, and a parison receiving position by a die transfer device. And a mold holding device that reciprocates between a mold and an air blowing position to open and close a mold, and a molded product holding device provided on a side of the mold clamping device and reciprocates between an air blowing position and a molded product transfer position. A hollow molding machine, a liquid filling device having a filling nozzle provided on a frame adjacent to the outside of the machine, a sealing device having a sealing tool provided in parallel with the liquid filling device, and a clamp reciprocated. It is characterized by comprising a first molded article transport device for transporting molded products from the molded product transport position to the filling position, and a second molded product transport device for transporting the filled molded products from the filled position to the sealing position by reciprocating the holder. To. [Detailed description of the invention]

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the molding and molding of a hollow molded article according to the present invention.
It is a whole block diagram of a filling device. Parts that are the same as or equivalent to the conventional example will be described using the same reference numerals.

As shown in FIG. 1, a crosshead 2 is provided at the tip of the extruder 1, and a parison cutting cutter 4 for cutting a parison 3 discharged from the crosshead 2 is provided immediately below the crosshead 2. Is provided. An air blowing device 6 having an air blowing nozzle 5 and a first molded product conveying device 7 are provided on a molding machine frame 8 in parallel with the crosshead 2.

The cross head 2 and the air blowing nozzle 5
A mold clamping device 11 that reciprocates between the parison receiving position A and the air blowing position B by the mold transfer device 9 and opens and closes the mold 10 is provided below. A molded product holding device 12 that reciprocates between an air blowing position B and a molded product transfer position C by the reciprocating motion of the mold clamping device 11 is attached to a side portion (the right side in the figure) of the mold clamping device 11. The apparatus described above constitutes a first station, a hollow molding machine.

The frame 1 adjacent to the molding frame 8
A liquid filling device 15 having a filling nozzle 14 and a heat sealing device 17 having a heat sealing device 16 such as an electric heater are provided in parallel on 3.

Below the filling nozzle 14 of the liquid filling device 15 and the heat sheet device 16 of the heat sealing device 17, between the filling position D and the heat sealing position E, by the drive unit 19 of the second molded article conveying device 18. A reciprocating holder 20 is provided. The second molded article conveying device 18
Is provided with a deburring device, a filling port cutting device, and the like. Further, a filled molded product shooter 21 and a burr discharge shooter 22 are provided in a position of the frame 13 below the heat sealing device 17.

One end of the first molded article transport device 7 is located above the molded product holding device 7 at the molded product transport position C, and the other end is located above the holder 20 of the second molded product transport device 18 at the filling position D. It is located in. The first molded article conveying device 7 includes a clamp 23 which reciprocates between the molded article conveying position C and the filling position D.
Is provided. In addition, the first molded article conveying device 7 includes:
A belt conveyor or the like can also be used.

The second operation is performed by the above-described liquid filling device 15 or the like.
The third station is constituted by a station, a heat sealing device, and the like.

Next, the molding operation will be described with reference to FIG. 1 and FIGS. 2 (a) to 4 (h). (First Station) (a, b) The parison 3 hanging from the crosshead 2 at the parison receiving position A is sandwiched between the molds 10 and cut by the parison cutting cutter 4. (C) The mold 10 is moved to the air blowing position B, the air blowing nozzle 5 is inserted into the parison 3 from above, and air is blown to form a molded product (container) 24. When the molded product 24 is cooled by the mold 10 and hardened properly and no longer deforms, the blowing air (pressurized air) is exhausted.

After the evacuation is completed, the mold 10 is opened, and the mold 10 is moved to the parison receiving position A in order to form the next molded product. At this time, the molded product holding device 12 is
Move to the air blowing position B.

The molded product 24 suspended from the air blowing nozzle 5 is held by the holder 12a of the molded product holding device 12 in accordance with the closing operation of the mold 10 (FIG. 3D).
reference). Thereafter, the nozzle 5 moves upward and comes out of the molded product 24.

Next, the mold 10 moves to the air blowing position B, and the molded product holding device 12 moves to the molded product transfer position C in conjunction therewith. Therefore, the molded product 24 held by the holder 12a is also a molded product. Move to transport position C. (Second station) (d) The first part that has descended from above at the molded article transfer position C
The molded product 24 is suspended by the clamp 23 of the molded product transport device 7.

Next, in conjunction with the opening of the mold 10, the holder 12a of the molded product holding device 12 is opened, and the molded product 24 is filled by the first molded product transfer device 7 at the filling position which is the second station outside the machine. D is transported. (E) While holding the molded product 24 in the holder 20 of the second molded product transport device 18 waiting at the filling position D, while the clamp 23 of the first molded product transport device 7 separates the molded product 24 and returns to the original position. The filling nozzle 14 of the liquid filling device 15 descends from above the molded product 24, is inserted into the filling port 24a of the molded product 24, and fills the molded product 24 with the filling liquid 25 as needed. (Third station) (f) The holder 20 holding the filled molded product 26 is
The drive unit 19 moves to a heat sealing position E which is a third station. At this heat sealing position E, the burrs of the filling molded product 26 are removed, and the filling port 24a is cut to a length that can be heat sealed with a nipper or a cutter. The burr is taken out by the burr discharge shooter 22. The deburring and cutting of the filling port 24a may be performed at the molded article transport position C. (G) Next, the heat sealing device 1 of the heat sealing device 17
6 is pressed down to the filling port 24a, and a part of the filling port 24a is melted to seal the filling liquid 25 so as not to leak, and then the sealed part is cooled. In addition, the heat sealing device 1
In place of 7, an ultrasonic weld sealing device may be used. (H) Next, the holder 20 is opened, and the heat seal portion 2 is opened.
6a is filled with the molded article shooter 21
Take it out by such means.

FIG. 5 is a comparison diagram of a molding cycle between the conventional apparatus and the apparatus of the present invention.

The time required for the molding cycle of the conventional apparatus is shown on the left side of the two-dot chain line in FIG. 5 and will be described with reference to FIG.

The opening and closing of the mold corresponding to FIGS. 3A and 3B, the cutting of the parison, the movement of the mold, and the like are performed for about 5 seconds. The blow molding and the cooling of the molded article corresponding to FIG. Approx. 12 seconds Approx. 8 seconds for liquid filling corresponding to (d) in FIG. 3 Approx. 8 seconds for deburring, filling opening cut and heat sealing corresponding to (e), (f) and (g) in FIG. Thus, the time required for the molding cycle of the conventional apparatus is about 33 seconds in total.

The time required for the molding cycle of the apparatus of the present invention is as follows:
Since it is shown on the right side of the two-dot chain line in FIG. 5, description will be made with reference to this.

The first station is shown in FIG.
The opening and closing of the mold corresponding to (b), the parison cutting and the movement of the mold, etc. are about 5 seconds, and the blow molding and cooling of the molded article corresponding to (c) are about 12 seconds, for a total of 17 seconds. 8 seconds for liquid filling corresponding to (d) and (e) in FIG. 3 and about 3 seconds for transport of the molded product, for a total of 1
1 second The third station is about 8 seconds for deburring, cutting of the filling port and heat sealing corresponding to (f) and (g) in FIG.
The process at the first, second, and third stations is performed in parallel, with the removal of the filled molded product corresponding to (h) being about 2 seconds and the transportation of the molded product being about 3 seconds, for a total of 13 seconds. Since it takes time, the time required for the molding cycle of the apparatus of the present invention is about 17 seconds. That is, in the present invention, the productivity can be approximately doubled by dividing the molding / filling step of the hollow molded article into three stations.

[0029]

According to the present invention, after a molded article is formed by a hollow molding machine, a liquid is filled by a liquid filling device adjacent to the outside of the machine, and then the filled article is transferred to a heat sealing device to remove burrs and fill. Since the mouth is heat-sealed, the molding cycle can be shortened and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an apparatus for molding and filling a hollow molded article according to the present invention.

FIG. 2 shows a molding operation in a first station of the apparatus according to the present invention.

FIG. 3 shows a molding operation in a second station of the apparatus according to the invention.

FIG. 4 shows a molding operation in a third station of the apparatus according to the present invention.

FIG. 5 is a comparison diagram of a molding cycle of a conventional apparatus and an apparatus according to the present invention.

FIG. 6 is an overall configuration diagram of a conventional apparatus for molding and filling a hollow molded article.

FIG. 7 is a view showing a molding operation of a conventional apparatus.

FIG. 8 is a view showing a molding operation following FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 extruder 2 crosshead 3 parison 4 parison cutting cutter 5 air blowing nozzle 6 air blowing device 7 first molded product transfer device 8 molding machine frame 9 mold transfer device 10 mold 11 mold clamping device 12 molded product holding device 12a holder 13 Frame 14 Filling Nozzle 15 Liquid Filling Device 16 Heat Sealing Device (Seal Device) 17 Heat Sealing Device (Seal Device) 18 Second Molded Product Transfer Device 19 Drive Unit 20 Holder 21 Filled Molded Product Shooter 22 Burr Discharge Shooter 23 Clamp 24 Molding 24a Filling port 25 Filling liquid 26 Filled molded product 26a Heat seal pan

Claims (5)

[Claims] After molding a molded article (24) with a hollow molding machine, the molded article (24) is transferred to a liquid filling device (15) adjacent to the outside by a first molded article conveying device (7). A method for molding and filling a hollow molded article, which comprises filling a liquid, transferring the liquid to a sealing device (17) by a second molded article conveying device (18), and sealing the filling port (24a). 2. The method according to claim 1, wherein before the filling port is sealed, deburring and cutting of the filling port are performed.
A method for molding and filling the hollow molded article according to the above. 3. An extruder (1) for discharging a parison (3) between molds (10), an air blowing device (6) for blowing air into the parison (3), and a mold transfer device (9). ), The parison receiving position (A) and the air blowing position (B)
The mold clamping device (1) reciprocates between and opens and closes the mold (10).
1) and a molded article holding device (12) provided on the side of the mold clamping device (11) and reciprocating between an air blowing position (B) and a molded product transfer position (C). A liquid filling device (15) provided on a frame (13) adjacent to the outside of the molding machine and having a filling nozzle (14); and a sealing device (1) provided in parallel with the liquid filling device (15).
Sealing device (17) having 6) and clamp (23)
Reciprocatingly moves the molded product (24) from the molded product transfer position (C) to the filling position (D), the first molded product transfer device (7)
And the holder (20) is reciprocated to form a filled molded product (26)
And a second molded article conveying device (18) for conveying the molded article from the filling position (D) to the sealing position (17). 4. The method according to claim 3, wherein the sealing device is a heat sealing device (17). 5. The method according to claim 3, wherein the sealing device is an ultrasonic weld sealing device.