JPH07124957A - Heat molding device - Google Patents

Abstract

PURPOSE:To prevent raw fabric from being burnt by lowering rapidly a temperature within a heating furnace, by jetting high-pressure air within a high-pressure air tank into a heating furnace through a nozzle by opening a valve at the time of generation of disorder. CONSTITUTION:A valve 44 which is opened only in case of disorder is provided in the middle of communication path 43 between a high-pressure air tank 41 and nozzle 42. Furthermore, the device is constituted so that the high-pressure air tank 41 is joined to an air pump 46 through a communication path 45, a valve 47 which is closed only in case of disorder is provided in the middle of the communication path 45 and in the case of an ordinary time, high-pressure air is stored within the high-pressure air tank 41 through an air pump 46. The valves 44, 47 are opened or closed by a disorder detecting device 48 such as an optical sensor. When the disorder is detected by the disorder detecting device 48, the valve 47 is closed, the valve 44 is opened and the jetted onto the raw fabric 11 through the nozzle 42. Hereby, a temperature within a main body 21 is lowered rapidly, inflammable gas is driven out of an outlet side by the air and the raw fabric can be prevented from being burnt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material combustion preventing structure when an abnormality occurs in an apparatus for heat-forming a raw material.

[0002]

2. Description of the Related Art An apparatus is known in which a raw material is heated at a predetermined speed by passing it through a furnace in which heaters are arranged at predetermined intervals to perform various processes such as foaming.

[0003]

By the way, in the event of an abnormality such as sagging of the original fabric for some reason or stop of movement of the original fabric due to power failure or the like, the original fabric may start to burn instantly. Therefore, in such a case, an emergency device for preventing the burning of the raw fabric is desired. The present application satisfies such a demand.

[0004]

According to a first aspect of the present invention, there is provided a heating furnace for heating a raw material passing at a predetermined speed, and cooling air into the heating furnace when an abnormality occurs due to sagging or stopping of the raw material. An emergency device for injecting and preventing raw fabric combustion is provided, and the emergency device is connected to the high-pressure air tank through a communication passage, and is provided in the middle of the communication passage with a nozzle facing the inlet of the heating furnace. It is characterized by including a valve that is opened when an abnormality occurs. The invention of claim 2 comprises a heating furnace for heating a raw fabric passing at a predetermined speed by a heater, and an emergency device for preventing raw fabric combustion when an abnormality occurs due to sagging or stopping of the raw fabric, The emergency device is provided with a shield that covers the original side of the heater when an abnormality occurs.

[0005]

According to the first aspect of the present invention, when an abnormality occurs, the valve is opened and the high pressure air in the high pressure air tank is ejected from the nozzle into the heating furnace. As a result, the temperature inside the heating furnace is rapidly lowered to prevent the raw material from burning. According to the second aspect of the present invention, when an abnormality occurs, the shield operates to cover the heater on the material side, thereby preventing the material from burning.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described with reference to FIGS. FIG. 1 shows the entire thermoforming apparatus, and FIG. 2 shows a system of an emergency device for preventing the burning of the raw material.

First, in FIG. 1, the thermoforming apparatus includes a raw fabric supply device 10, a heating furnace 20, a cooling device 30, and an emergency device 40.

The raw fabric supply device 10 comprises a supply roller 12 around which a raw fabric 11 made of unfoamed vinyl chloride resin is wound, and supplies the raw fabric 11 into the heating furnace 20 at a speed of about 30 to 40 m / min. There is.

The heating furnace 20 is provided with a main body 21 inclined so that the inlet side is low and the outlet side is high, supporting legs 22 and 23, and a suction duct 24 provided at the outlet part. A heater 25 and a heater 25 are provided in the main body 21. Shield 26 with a semicircular cross section
Are arranged in the length direction at predetermined intervals, and in the normal case, the original fabric 11
Can be heated up to about 170 ° to 180 ° C on the outlet side.

The suction duct 24 collects the combustible gas generated in the main body 21 and quickly discharges it to the outside. Below the main body 21, a substantially trapezoidal space 28 is formed between itself and the floor.

The cooling device 30 includes a first cooling roller 31, a second cooling roller 32, a third cooling roller 33, an idle roll 34, a first cooling air duct 35 and a second cooling air duct 36, and a second cooling air duct. The roller 32 and the third cooling roller 33 are arranged in this order in the heating furnace 2 rather than the first cooling roller 31.
The first cooling roller 31 to the third cooling roller 33 are arranged in a substantially V-shape and are arranged on the inlet side of 0. First cooling roller 3
In the case of this embodiment, the distance from the first cooling roller 33 to the third cooling roller 33 is about 3 m, which is much shorter than the conventional one.

First cooling roller 31 and second cooling roller 32
Respectively contact the back surface of the original fabric 11 and are arranged between the first cooling roller 31 and the second cooling roller 32 and between the second cooling roller 32 and the third cooling roller 33. By the second cooling air duct 36, the original fabric 11
By cooling the surface side of the main body 2, the main body 2 is cooled at about 170 ° to 180 ° C before reaching the third cooling roller 33.
The surface temperature of the original fabric 11 coming out of 1 is cooled to about 40 ° C.

The third cooling roller 33 comes into contact with the back surface of the material 11 to cool it, and then the idler roll 34 below the material changes the direction of the material 11 and moves to the next step such as embossing. .

The emergency device 40 is the original 1 for some reason.
1 is a device for rapidly cooling the inside of the main body 21 when an abnormality such as the slack of the raw material 1 or the stop of the material 11 due to a power failure occurs. It is for ejecting inward.

As shown in detail in FIG. 2, the high-pressure air tank 41
A valve 44 that is opened only in the event of an abnormality is provided in the communication path 43 between the nozzle 42 and the nozzle 42.

Further, the high pressure air tank 41 has a communication passage 45.
A valve 47 that is connected to the air pump 46 via a valve and is closed in the middle of the communication passage 45 only when an abnormality occurs, and normally stores high-pressure air from the air pump 46 into the high-pressure air tank 41.

The valves 44 and 47 are opened and closed by abnormality detecting means 48 such as various well-known slack sensors such as optical type. When the abnormality detecting means 48 detects an abnormality, the valve 47 is closed and the valve 44 is opened. , The high pressure air in the high pressure air tank 41 is fed from the nozzle 42 to the original fabric 11
It is designed to squirt up.

As a result, the temperature inside the main body 21 is rapidly lowered and the combustible gas is expelled to the outlet side by the jetted air, so that the combustion of the raw fabric can be prevented. Moreover, even if an abnormality occurs due to a power failure, the nozzle 4
The air can be surely ejected from No. 2, which is extremely effective.

FIG. 3 shows a second embodiment, in which a shield 50 is provided between the heater 25 and the material 11 in the heating furnace in parallel with the material 11.
Is provided. An opening 51 is provided at a position of the shield 50 corresponding to each heater 25 (A), and when the shield 50 is moved, the heater 25 is covered with a non-opening (B). In the B state, even if the movement of the raw fabric 11 is stopped, the heat of the heater 25 does not reach the raw fabric 11, so that the combustion of the raw fabric can be prevented.

FIG. 4 shows another embodiment relating to another plan of the shield, and the same effect can be obtained by rotating the shield 26 to cover the raw material 11 side of the heater 25 when an abnormality occurs.

According to the first aspect of the present invention, when high pressure air is ejected from the high pressure air tank into the heating furnace when an abnormality occurs, it is possible to prevent the raw material from burning. Claim 2
According to the invention of (1), when the abnormality occurs, the heater can be covered with the heater to prevent the raw material from burning.

[Brief description of drawings]

FIG. 1 is an overall view of an apparatus according to an embodiment.

FIG. 2 is a configuration diagram of a main part of the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment.

FIG. 2 is an explanatory diagram of a third embodiment.

[Explanation of symbols]

10: original fabric supply device, 11: original fabric, 20: heating furnace, 2
1: body, 25: heater, 26: shield, 30: cooling device, 40: emergency device, 42: nozzle

[Procedure amendment]

[Submission date] August 19, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an overall view of an apparatus according to an embodiment.

FIG. 2 is a configuration diagram of a main part of the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment.

FIG. 4 is an explanatory diagram of a third embodiment.

[Explanation of Codes] 10: Original Fabric Supply Device, 11: Original Fabric, 20: Heating Furnace, 2
1: body, 25: heater, 26: shield, 30: cooling device, 40: emergency device, 42: nozzle

Claims (2)

[Claims] 1. A heating furnace for heating a raw material passing at a predetermined speed, and for preventing raw material combustion by injecting cooling air into the heating furnace when an abnormality occurs due to sagging or stopping of the raw material. The emergency device is provided with a nozzle that faces the inlet of the heating furnace and a valve that is provided in the middle of the communication passage and that is opened when an abnormality occurs while being connected to the high-pressure air tank through the communication passage. Characteristic heat molding equipment. 2. An emergency apparatus comprising: a heating furnace for heating a raw material passing at a predetermined speed by a heater; and an emergency device for preventing raw material combustion when an abnormality occurs due to sagging or stopping of the raw material. Is provided with a shield that covers the original side of the heater when an abnormality occurs, the thermoforming device.