JPH07126765A - Continuous recovery device for metal films from film composites - Google Patents

Abstract

(57) [Abstract] [Purpose] A film material consisting of resin and metal is pyrolyzed with a high temperature inert gas to form flammable gas and carbon, which are then separated and only the metal film is continuously recovered. [Structure] Transfer roll 2, preheating unit 4, thermal decomposition heating element 6 and deodorizing burner 7, thermal decomposition unit 5 with exhaust gas pipe 8 attached, peeling unit 15 with injection nozzle 19, guide roll 16, recovery The roll 21 is used.

Description

Detailed Description of the Invention

[0001]

The present invention relates to the rapid thermal decomposition of a resin component from a film- or foil-shaped composite material composed of metal and resin.
The present invention relates to a device for continuously collecting only a metal film. Examples of composite materials include wiring boards used in the electronics industry, coating foils used for wiring boards, composite film materials of aluminum and resin, composite materials of various metal foils such as coated thin plates and foils, and resin films. .

[0002]

2. Description of the Related Art A combustion method is known as a method of recovering metal from a plate, film or foil material which is a composite of resin and metal. When the material is burned, only the resin component burns, so the unburned metal is recovered.

According to this method, the recovery rate is good if the metal material is a thick plate, but if the metal is a thin material such as a film or foil, the temperature of the film or foil becomes high when the resin burns. Most of them are exposed to oxidation and burned out, and the recovery rate as a metal film or foil is extremely poor.

Further, in order to prevent high temperature oxidation due to the above direct combustion, a thermal decomposition method using a closed pot is carried out. However, since the film / foil material is folded and filled, heat transfer to the resin between the films is poor. However, since the thermal decomposition takes time, the processing capacity becomes small. In addition, the residue after thermal decomposition remains between the metal films, and the value as a recovered metal becomes low.

[0005]

It is difficult to perform efficient continuous recovery by the conventional combustion method or closed-type thermal decomposition method, and the value of the recovered metal is low, so that the recovery is efficient and continuous and there are no impurities. Provide a device for recovering metals with high added value.

[0006]

Means for Solving the Problems A film composite material (a film composite material of a resin film and a metal film is hereinafter simply referred to as a film material) is fed into a roll, a preheating section, and a film material fed into the chamber so as to be separated into upper and lower chambers. The upper chamber is equipped with a heating element for thermal decomposition and a deodorizing burner, and the lower chamber is a device composed of a thermal decomposition section constituted by a cooling chamber for the film material, a peeling section provided with an injection nozzle, and a recovery roll.

[0007]

In the apparatus configured as described above, the film material is fed to the preheating section by the feeding roll, preheated by the high temperature exhaust gas from the thermal decomposition section, and then fed to the thermal decomposition section. In the thermal decomposition section, high-temperature gas from the thermal decomposition heating element is blown onto the film material to rapidly heat the resin film at high temperature to thermally decompose the resin. Since flammable gas generated by thermal decomposition has a bad odor,
Burn with a deodorizing burner to deodorize.

Carbon produced by thermal decomposition adheres to the surface of the metal film in which the resin component is thermally decomposed, and is sent to the peeling section in this state. Here, the powder is projected from the jet nozzle, the carbon adhering to the surface of the metal film is peeled off by impact, and only the metal film is collected.

[0009]

EXAMPLES Examples will be described with reference to the drawings.
In FIG. 1, a preheating unit 4 is provided in front of the thermal decomposition unit 5, a transfer roll 2 is provided inside the supply coil 1, the preheating unit 4 and the thermal decomposition unit 5 in the vicinity of the inlet of the preheating unit 4, and the thermal decomposition unit 5 is The pyrolysis heating element 6 is attached to the inlet of the upper chamber, and the exhaust gas pipe 8 is attached to the upper portion of the outlet, and is connected to the exhaust gas blower 10. An air suction pipe 9 is provided in the middle of the exhaust gas pipe 8. The outlet of the exhaust gas blower 10 is connected to the preheating section 4 by a conduit 11.

The lower portion of the thermal decomposition section 5 is separated from the upper chamber by the film material fed by the transfer roll 2, and the film material air cooling chamber 12 is provided.
To form. A cold air inlet 13 is attached to this air cooling chamber.
A part of the transfer roll 2 installed in the air cooling chamber 12 may be equipped with a water cooling roll in order to enhance the cooling effect of the film material.

The end of the thermal decomposition section 5 is connected to the peeling section 15. A jet nozzle 19 is attached to the peeling section 15 and is connected to a jet blower 18 and a powder feeder 17, respectively. Further, the peeling section 15 is connected to the dust collector 22 through a guide roll 16 and an exhaust pipe. A recovery roll 21 is provided on the exit side of the peeling unit 15.

[0012]

Since the present invention is constructed as described above, it has the following effects.

The exhaust gas blower 10 is operated. The burner of the heating element 6 for thermal decomposition (which may be an electric heater or the like, but is described here as a burner) and the deodorizing burner 7 are ignited. The film material 3 is sent from the supply coil 1 to the preheating unit 4 by the transfer roll 2. The combustion exhaust gas from the burners 6 and 7 is sent to the preheating section 4 via the conduit 11 by the exhaust gas blower 10 to preheat the membrane material 3 sent to the preheating section 4.

The preheated film material 3 is sent from the preheating section 4 to the pyrolysis section 5 and is directly heated by the high temperature gas generated by the burner of the pyrolysis heating element 6. Since the burner of the pyrolysis heating element 6 burns with a theoretical air amount, the combustion gas contains almost no oxygen. Therefore, the high temperature combustion gas thermally decomposes the resin component of the film material and separates it into combustible gas and carbon, but does not burn the combustible gas.

Further, in the film material 3, while the resin film on the upper surface is pyrolyzed at a high temperature, the metal film on the lower surface is not cooled to high temperature because it is cooled by the cold air in the cold air chamber 12 or the water cooling roll 14. There is no risk of oxidation or burning.

Carbon adheres and remains on the surface of the metal film where the resin component is thermally decomposed. In this state, the film material 3 is sent from the thermal decomposition section 5 to the peeling section 15 via the guide roll 16. The jet blower 18 and the powder supply device 17 are operated, and the powder is projected from the injection nozzle 19 onto the metal film to which carbon is attached. The adhered carbon is separated from the surface of the metal film by the impact of the powder.

Since the combustible gas generated by the thermal decomposition in the thermal decomposition section 5 has a bad odor, it is burned and deodorized by the deodorizing burner 7 attached to the upper part, and the combustion exhaust gas is preheated from the exhaust gas blower 10 through the conduit 11. It is sent to the part 4 and used for preheating the film material 3.

The film material 3 is obtained by thermally decomposing a resin component into combustible gas and carbon, and separating them from each other. Then, only the metal film is wound around the recovery roll 21 via the guide roll 16.

According to the present invention, the resin component is thermally decomposed in an extremely short time and the metal film is oxidized by directly irradiating the film material 3 with the high-temperature inert gas generated in the pyrolysis heating element 6 as described above. It is possible to prevent burnout, efficiently process such a film material that has been conventionally difficult, at high speed, and recover only the metal film.

[0020]

[Brief description of drawings]

FIG. 1 is a continuous recovery apparatus for a metal film from a film material.

FIG. FIG.

[Explanation of symbols]

 1. Supply coil 2. Transfer roll 3. Membrane material 4. Preheating section 5. Thermal decomposition part 6. Heating element for thermal decomposition 7. Deodorizing burner 8. Exhaust gas pipe 9. Air suction tube 10. Exhaust gas blower 11. Conduit 12. Air-cooled room 13. Cold air inlet 14. Water-cooled roll 15. Peeling portion 16. Guide roll 17. Powder feeder 18. Jet blower 19. Injection nozzle 20. Powder hopper 21. Recovery roll 22. Dust collector

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B09B 5/00 ZAB B09B 5/00 ZAB R

Claims (3)

[Claims] 1. A transfer roll (2) is disposed on one side of a rectangular parallelepiped thermal decomposition section (5), a thermal decomposition heating element (6) is provided at the upper part of the inlet, and a deodorizing burner (7) is provided at the upper end of the outlet. Attached, the exhaust gas pipe (8) is provided on the upper part thereof, the end is connected to the spray nozzle (19), the peeling part (15) provided with the guide roll (16) is connected, and a recovery roll is provided at the outlet thereof. Continuous recovery device for metal films from composite materials. 2. The exhaust gas pipe (8) is connected to the exhaust gas blower (1).
0), the preheating part (4) is connected to the preheating part (4) via a conduit (11), and the preheating part (4) is arranged before the pyrolysis part (5). Recovery device. 3. A transfer roll (2) for the thermal decomposition section (6).
An apparatus for continuously recovering a metal film from a film composite material according to claim 1, wherein an air-cooling chamber having a cold air inlet (13) attached to the lower part thereof is provided.