JPS6045101A - Blow and filling circuit for synthetic substance vessel molding machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blowing and filling circuit for a synthetic container forming machine that molds a container made of synthetic material and seals the mouth of the container after filling it with a filler. Most of the filling materials handled by molding machines are liquid chemicals or fluid foods, and the compressed air and blow circuit used to mold containers, as well as the filling circuit that flows the filling materials, are sterilized, cleaned, and dried before starting work. Although it may not be necessary to use it, since the blow circuit and filling circuit are separate systems, it is possible to perform sterilization, cleaning, and drying operations without disassembling part of the piping. First, this had the disadvantage of becoming a major hindrance and reducing the operating rate of the machine.

The object of the present invention is to eliminate these drawbacks, and to provide a synthesis system that can automatically complete sterilization and drying of the blowing and filling circuits using a timer at the start of production the next morning by cleaning the filling circuits after the work is completed. The present invention provides a blowing and filling circuit for a material container forming machine. Embodiments of the present invention will be described below with reference to the drawings.

1(a) and (1)), an overview of the overall structure and operation of the synthetic material container forming machine will be described. The synthetic material container forming machine consists of a melting and extruding device (]), a forming and filling device (2), and a mold device (3). The melting and extrusion device (1) heats and melts the supplied granular synthetic material, such as a synthetic resin material, extrudes a tubular parison (5) from the parison head (4), and sends it to the hollow part of the parison (5). The parison (5) is cut to a certain length by blowing air through the air port (6) to maintain its shape, and at the same time, the parison (5) is clamped by the molding device (3) to seal the lower end surface of the parison (5), and the upper part of the parison (5) is sealed. It is held between the retainers (8). The molding device (3) moves to the right and molding and filling device (2)
It stops below the blow filling head (11). The blow tube (+4) descends from the blow filling head side and is inserted into the parison (5), and the parison (5) is inserted between it and the mold device (3).
) is airtightly sandwiched, the blow tube 0.
The parison (5) is formed into a container by the compressed air supplied from 4). Subsequently, the injection tube (1, 5) housed in the center of the blow tube (14) descends into the container. The filling is supplied in fixed amounts from a tank (9) storing the filling by a measuring cylinder (10) driven by a hydraulic cylinder, and is injected into the container from the injection pipe (15) via the hose 02). Conversely, the air inside is discharged to the atmosphere through the blow pipe 04) and the air supply port (13). After filling the container with the filling material, the mouth of the container is sealed by a molding device (3) to form a product.

In Figure 2, the Harinon head (4), its air inlet (6), and tank (9) of the container forming machine explained in Figure 1 are shown.
), metering cylinder (10) and blow filling head 01)
and its blow tube 04), the blow circuit for the injection tube (15), and the blow and fill circuit. Tank (9
) is supplied with filler from a filler source (16) and maintained at a constant level. The fill source o(i) is switched to cleaning fluid after the day's production is finished and the tank (9)
, metering/linda (10), hose (12), injection pipe (+
5) Clean the dummy container (1 line, blow tube (14),
It is recovered from the return port Re via the control valves VIOXV12 and V13. Turn off the power after cleaning. In order to prepare for the start of production the next day, the first long-term timer (which is used to turn on the power)
(not shown) and each control valve ■1, ■2, which leads from the pressure steam source (18) to the circuit for sterilizing the blowing and filling circuit.
v8, ■12 Set the required time to the second long time timer (not shown) for switching the other settings.
The power is turned on by the signal issued by the second long-time timer, and the control valve v1 opens and steam begins to flow. First control valve ■2
The upper side (pressure air) is closed, and the lower right side is open, and the tank (9), metering cylinder (10), and hose (
12), injection pipe (through the filling circuit to the dummy container (19), blow pipe (1 side) to the control valve VIO1V12, V1'2 is open on the right side, and the steam flapper is connected to the circuit between these. Steam escapes from SFI, SF5.8F6, and each steam flapper closes when the set temperature reaches approximately 125°○.During production, from control valve 1 to the metering cylinder to which pressure steam is supplied via pressure regulating valve 4. 10) and the movable part of the blow filling head αυ, the control valve ■6 is switched to open and pressurized steam is allowed to flow through the steam flappers SF2, SF3, respectively.
Release from SF, i and close at set temperature. Regarding the control valve v8, the upper side (pressure air) is closed and the left and right sides are open, and the control valve v9 merges into the VIO path. ■V14 opens from 8, ■15
is closed, and the seedless chamber (2) is closed, covering the upper part of the molding device (3) with clean air.
Close the on-off valve (2I) of 0) and open Vl and 6 to allow steam to flow through the steam flapper SF8. During production, the sterilization room (20) is filled with compressors,
Clean air is supplied by controlling the air heater (22) with a pressure switch (23). Each of the above circuits has a temperature sensor S1.
~S6 are provided, and the signals thereof are processed by an electric circuit to be described later. A portion of the steam from Vl2 also flows to the muffling tank (24) via Vl3. In addition, the on-off valve (25) that opens and closes the bottom of the dummy container (19) can be manually opened to allow steam to escape from the flapper S Ii'7, thereby helping to quickly raise the temperature. Dummy container (19) during production
is removed.

When each temperature sensor S1 to S6 reaches the required temperature, a signal from an electric circuit, which will be described later, is used to control valves ■2, ■8, and Vl2.
Others are restored to the state at the time of production, and at the same time, solenoid valve ¥1 is opened and solenoid valve ¥2 is switched so that the pressure air source (1, 7) and the control valve 2 side are directly connected. The lower side (pressure steam) of v2 is switched to closed, and the pressure air supplied from the pressure air source 07) through the drain filter DF passes through 2 and is sterilized by the filter F1, and then flows from the tank (9) to the injection pipe ( 15) from the blow pipe (14) to Vlo, Vl2,
Vl3, escapes to the outside air via the exhaust side of the blow circuit that reaches the muffling tank (24). In addition, the control valve v8 is switched to close on the right side (pressure steam) and open on the upper side (pressure air), and the pressure air sterilized by filter F2 from ■8 to V9 and VIO1.
It escapes to the outside air via V12, Vl3, and the sound deadening tank (24). ■8, ■9, blow tube, VIO1V12, Vl3,
The blowing circuit leading to the muffling tank e4) is also vented with pressurized air from the filling circuit.

Through the above ventilation, the blow circuit and the filling circuit are sterilized with steam, and the remaining coagulated water is discharged and cooled. After ventilation ■
3 and Vl2, the steam flappers SF5 and SF6 sides are switched to close. The tank (9) is filled to a certain height, and the solenoid valve ￥2 is restored on the top surface as shown in the figure, and depressurized air is supplied by the pressure regulating valve R1 and the IJ valve R2. be done. V in the sterile room (20)
14 and V16 are closed, V15 and the on-off valve (21) are opened, and compressed air is supplied by the compressor (22). The parison head (4) is equipped with a solenoid valve (25), a solenoid valve (25), and a relief valve (26) for adjusting the amount of air. Air is sent from the air supply port (6) through an air supply circuit that reaches a heater (27) that sterilizes the air.

Production begins in the above state.

FIG. 3 shows an electric circuit that processes signals input from the temperature sensors S1 to S6 mentioned above. Signals from temperature sensors S1 to S6 are received by an interface I/F,
After compensating for errors and the like in a conversion circuit, the signals are input to a comparator as digital signals (B1 to B6) by an A/D converter. The lower limit setting device indicates the lower limit temperature required for sterilization, for example 121.
℃ is set and its digital signal A is input to the comparator. The comparator compares both signals A and B1 to BG, and when A>B, a signal is emitted, and when A≦B, a signal is emitted. The hold circuit holds the comparator signal,
Timer 1, which is started upon receiving the signal from the second long time timer mentioned above, samples the signal held by the signal transmitted after a certain period of time and inputs it into the OR circuit. The fixed time period set by timer 1 is used to eliminate irregularities in the rise of temperature sensors S1 to S6 when pressure steam flows through the circuit described above based on the signal of the second long time timer. The output of the hold circuit lights up the lamps L1-L6, indicating that the temperature sensors S1-S6 are below the set temperature. Timer 2, which starts when Timer 1 sends a signal, takes a set time (usually 20 to 3 seconds, which is the time it takes for each temperature sensor S1 to S6 to reach the set temperature).
0 minutes) and sends a signal to the flip-flop and flip F/F. The OR circuit outputs when there is even one output from the hold circuit, and the output is amplified and output from relay X1 to indicate that sterilization is not completed. OR, when the output of the circuit disappears, the output of relay At the same time, the control valve ■2, external and solenoid valve shown in Figure 2
As is clear from the above description, in the present invention, the blowing and filling circuit is automatically sterilized by pressure steam before the production start time.
Since it is dried and cooled by sterilized pressurized air and kept in a production-ready state, it can improve the operation rate of the synthetic material container molding machine and save a lot of man-hours, so it has practical effects and advantages. is extremely thick.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are explanatory diagrams of the structure and operation of a synthetic material container forming machine, Figure 2 is a blowing and filling circuit diagram of an embodiment equipped with the machine, and Figure 3 is its circuit diagram. FIG. 3 is a block diagram of an electrical circuit for processing sensor output of the sensor. 1 is a melting and extrusion device, 2 is a molding and filling device, 3 is a mold device, 4
is a parison head, 5 is a parison, 6 is an air inlet, 7 is a cutter, 8 is a retainer, 9 is a tank, 10 is a measuring cylinder,
11 is a blow filling head, 12 is a hose, 13 is an air supply port, 14 is a blow pipe, 15 is an injection pipe, 16 is a filling source, 1
7 is a pressure air source, 18 is a pressure steam source, 19 is a dummy container, 2o is a sterile room, 21 is an on-off valve, 22 is a compressor,
23 is a pressure switch, 24 is a muffling tank, 25 is a throttle valve, 26 is a relief valve, 27 is a heater, Be is a return port, ■ is a control valve, SF' is a steam wrapper, R is a pressure regulating valve, F is sterilization filter, S is temperature sensor, Y is % magnetic valve, DF
is the drain filter. Patent applicant Representative of AIDA ENGINEERING Co., Ltd.
Meeting 1) Keinosuke

Claims (1)

[Claims] In a synthetic material container forming machine, the blow circuit from the source of pressurized air to the blow tube of the blow filling head and the filling circuit from the tank storing the filling through the metering cylinder to the injection tube of the blow filling head are operated by pressurized steam. A plurality of control valves are provided to switch and communicate between the air source and the pressure air source, and a plurality of temperature sensors are provided at required positions in the blowing and filling circuit, and a plurality of steam flasks are connected and disconnected by the control valves. A blowing and filling circuit for a synthetic material container forming machine, characterized in that: