JPS6049918A - Preventor for contamination of plastic container molding machine by exhaust gas system - Google Patents

Abstract

PURPOSE:To perform a through process of plastic container molding machine under aseptic conditions by a method in which the port for supplying and discharging aseptic air is connected to an air supply system circuit and an exhaust system circuit through a switch control valve in the blow molding and packing head for plastic containers, and the terminal of the exhaust system circuit is opened in a sterilizing liquid. CONSTITUTION:In molding a container 13 by blow molding, a mandrel 21 for blowing is inserted into the opening of a parison held by a die 6 to hold the parison air-tightly between it and the die 6. A control valve 27 is closed on the side C and switched to the path A, B, pressure air is blown into the parison 5 through a sterilized filter 28, an air supply and discharge port 12, and a path 23, and the parison 5 is molded into a container 13 along the inside shape of the die 6. The control valve 27 is then switched to the path A, C, an injection tube 14 is lowered, the valve 24 is opened, a packing material is injected into the container 13, and the air in the container 13 is released through the path 23 into a sterilizing liquid in a sterilizing tank 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing pollution from the exhaust system of a plastic container molding machine.

A plastic container forming machine is a series of machines that melt a synthetic material, blow air into a plastic container, fill the container with a sterile filling, such as a fluid food or medicine, and then seal the opening of the container. It is a machine that can repeat the process. When a container is formed using this machine, the sterile air blown into the container must be exhausted when filling the container, so the device is equipped with piping for an air supply system and an exhaust system. . With conventional machines, it was not possible to maintain the air supply system piping and exhaust system piping for molding in a sterile state during the entire process, making it impossible to fill with sterile filling. ○ The object of the present invention is to eliminate this drawback, and to form containers by attaching an exhaust system that opens the end of the piping below the surface of the tank containing disinfectant to prevent backflow of outside air containing bacteria. An object of the present invention is to provide a device for preventing contamination from the exhaust system of a plastic container molding machine, which enables both filling and filling operations to be performed in a sterile state. Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a plastic container forming and forming machine. The molding machine is composed of a parison extrusion device (1), a molding and filling device (2), and a blow die device (3). The granular synthetic material fed into the parison extrusion device (1) is heated and melted and extruded as a hollow tubular parison (5) through the extruder 7+-(,l). The parison (5) extruded to a certain length is held by the die (6) (6) and the retainer (by force. At that time, the parison (5)
The lower end of the parison is crushed and sealed (5)
Depressurized and sterilized pressurized air is constantly blown through the air supply port (8), and when the lower end is sealed, the fat swells slightly. At the same time, it is cut with the cutter (9) and the blow die device (
3) holds the cut parison (5) and moves it to the blow filling station (1) as shown in the figure. A blow molding filling head 00) of a molding and filling device (2) is provided above the blow filling station. A tube member (11), which will be described later, descends from the blow molding filling head (10), is inserted into the opening of the parison (5), and is inserted into the die (6).
) The neck of the parison (5) is airtightly sandwiched between (6) and the tube member 01). From the supply/exhaust port (12) to the pipe member (11
), sterilized pressurized air is blown into the parison (5) to blow mold the container (13). Pipe part fA'
The injection tube (I4) installed in the center of Q1) descends,
The filling port is opened and the filling is injected. Along with this, the air inside the container (13) is transferred to the air supply/exhaust port (which will be described later).
12) is discharged to the outside air. The injection pipe (14) is connected via a hose (15) to a metering cylinder α-force which supplies the filling in fixed quantities from the tank (I6). The metering cylinder α force is reciprocated through a constant stroke by an attached hydraulic cylinder. When the container (13) is filled with the filling material, the injection pipe α (a) and the tube member circle rise, and the container 03
) is sealed by the occluder (3]) of the blow die device (3).

In Fig. 2, the structure of the pipe member 0]) and the injection pipe 04) provided in the blow-molding filling head 00) so as to be able to rise and fall, and the air supply system circuit (18) connected to the supply and exhaust port (12) thereof.
and exhaust system circuit (19) are shown. Pipe member (11
) is guided by a guide rod (20) to the blow molding filling head 0.0) so as to be able to rise and fall freely. Pipe member (11)
A blowing mandrel (2I) is fixed at the lower end of the
Its lower end is shaped and sized to airtightly sandwich the neck of the parison held by the die (6) when lowered. The injection tube side is provided at the center of the pipe member (11) and the blowing mandrel (2I) so as to be able to move up and down, and a packing (22) is provided between the pipe member 0υ and the blowing mandrel (2I) is held airtight. The gap between the blowing mandrel (21) and the injection pipe Oa is the blowing pressure air passage (23)
It is connected to the air supply and exhaust port (12) provided in the pipe section.

At the center of the injection pipe side, a central shaft (25) with a valve C74 at its lower end is provided so as to be movable up and down, and the lower end of the injection pipe Oa is a valve seat that comes into close contact with the valve (24J). Axis (2
The gap between 5) and the injection tube 04) forms a passageway (26) for the filling, which is connected to the hose (I5) shown in FIG. 1 at the upper part of the injection tube 04). Supply and exhaust port of pipe member 0υ (
12), the air supply system circuit discharge and the exhaust system circuit (I9) are connected via a control valve (27). When the control valve (27) is switched, the A side is connected to the supply air 1 air port (12), the 13 side is connected to the air supply system circuit (18), or the exhaust system circuit (1'9) is connected. We will notify you if C0I11 has collapsed. The air supply system circuit 08) is provided with a sterilization filter (28) and connected to a pressurized air source (29). The terminal of the exhaust system circuit (19) opens into the disinfectant solution in the disinfection tank (30). The tank (30) is provided with an opening that communicates with the atmosphere from above the liquid level.

Next, we will discuss the effect. When blow molding the container (13), the center shaft (25) is raised relative to the injection pipe (14), the passage (2G) is sealed with the valve 0i), and in this state the tubular member circle is lowered. Although the control valve (2η) is switched to the B-side closed state and AC communication, there is no risk of outside air entering the exhaust system circuit (19) from the disinfection tank (30).Gui (6)
) into the opening of the parison held by the blowing mandrel (
2υ is inserted and the parison is airtightly held between it and the gouer (6). During this time, the parison (5), whose lower end is sealed, is slightly inflated and then deflated slightly in the goo (6), as described in connection with Figure 1, and sterile air is released from the opening. Therefore, there is no risk of outside air entering the parison (5).

Next, the control valve (27) is switched to C side closed and A'B open, and pressurized air passes through the sterilization filter (28), the supply/exhaust port (12), and the passage (23) to the parison (5). After blowing, the parison (5) is formed into a container (13) along the inner shape of the goo (6). Then the control valve (27)
When the injection pipe 04) is lowered to a predetermined height 1, the central axis 25 is moved slightly downward 9, and the valve 2 is opened and the filling is injected into the container (I3).

The air in the container (13) pushed by the filling is released into the disinfectant solution in the disinfection tank (3o) through a passageway and two control valves, and escapes to the outside air. When the pipe (14) rises and a predetermined amount is injected into the container (13), the valve c1) closes and the blowing mandrel (21) rises.At the same time, the occluder (31) closes the container The mouth is sealed.

As is clear from the above description, according to the present invention, the terminal of the exhaust system circuit is opened below the liquid level of the sterilization tank to prevent backflow of outside air containing bacteria, and the air supply system circuit is sterilized. This plastic container molding machine can perform both the molding and filling operations of plastic containers continuously under sterile conditions, as it can be switched using a control valve. The practical effects and benefits of completing this are extremely significant.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are diagrams illustrating the outline of a plastic container molding machine, and FIG. 2 is a vertical sectional view of a main part of a blow molding filling head and an air supply/exhaust circuit diagram showing an embodiment. 1 is a parison extrusion device, 2 is a molding and filling device, 3 is a Brogui device, 4 is an extrusion head, 5 is a parison, 6 is a Guy,
7 is a retainer, 8 is an air supply port, 9 is a cutter, 10 is a blow molding filling head, 11 is a pipe member, 12 is an air supply/exhaust port, 13 is a container, 14 is an injection pipe, 15 is a hose, 16 is a tank, 1
7 is the volume cylinder, 18 is the air supply system circuit, and 19 is the exhaust gas cylinder.
System circuit, 20 is a guide rod, 21 is a blowing mandrel, 22 is a packing, 23 is a passage, 24 is a valve, 25 is a central shaft, 26 is a passage, 27 is a control valve, 28 is a sterilization filter, 29 is Pressure air source, 30, Shukamo Turk, 31
is an occluder. Patent applicant Representative of AIDA ENGINEERING Co., Ltd.
Meeting 1) Keinosuke

Claims (1)

[Claims] In the blow-molding filling head of a machine that repeats a series of steps of forming containers from synthetic materials, filling the containers with sterile filling, and sealing them, the sterilized air supply and exhaust ports are connected to the air supply system circuit. from the exhaust system of a plastic container molding machine, characterized in that the exhaust system circuit is connected to a control valve that switches and communicates with the exhaust system circuit, and the terminal of the exhaust system circuit is opened into a disinfectant solution in a disinfection tank. Pollution prevention equipment.