KR20100067455A - Harmful gas removal device of plastic molding machine using decomposition and activated carbon absorbing method - Google Patents

Abstract

PURPOSE: An apparatus for removing hazardous gas from a plastic molding tool using decomposition and an activated carbon adsorption method is provided to prevent degradation when drying a raw material or quality degradation of products by uneven drying and to completely eliminate gas and moisture generated during molding, while minimizing a product molding failure rate. CONSTITUTION: An apparatus for removing hazardous gas from a plastic molding tool comprises the following: a hopper(10) receiving raw materials and supplying the raw materials; a cylinder(20) which stirs and transfers the raw materials from the hopper to an internal screw; a bent body(30) extruding the raw material with a nozzle; the nozzle(40) extruding the raw material and injecting into a mold; a heat insulation cover(60) which is installed in the bottom circumference ream of the hopper and prevents heat dissipation of the hopper in a molder which consists of an air cleaner(51), a blower(52), and a heater(53) with a drying method(50) drying the raw material in the hopper; a gas collection removal unit which is connected to the cylinder, the bent body, and a cap(41a) of the nozzle with each pipe(21,31,41).

Description

Hazardous gas removal device of plastic molding machine using decomposition and activated carbon absorbing method}

The present invention relates to a gas removal apparatus for removing gas generated from a plastic molding machine, and more particularly, to a harmful gas of a plastic molding machine using a decomposition method and an activated carbon adsorption method, in which a harmful gas is burned by a decomposition method using a catalyst and adsorbed by an activated carbon adsorption method. It relates to a gas removal device.

Molding plastic products that melt the raw materials in a molding machine (injection, extrusion) to make them into the desired motherland is a solid particle or polymer that looks like a gas (combustible gas and non-combustible gas) and smoke when moisture or air comes in contact with the melting of the raw material. Fragmentation will occur.

The flammable gas contains harmful volatile organic compounds (VOCs), which may cause serious damage to humans or animals and plants.

Volatile organic compounds (VOCs) are liquid or gaseous organic compounds that easily evaporate into the atmosphere due to their high vapor pressure, which can cause photochemical reactions in the atmosphere, which can cause photochemical smog and cause severe odors and damage to animals and plants. .

In addition, the synthetic resin raw material of fine particles or granules, which is a molding material for plastic products, contains moisture. Therefore, in order to mold high-quality synthetic resin products, the gas containing moisture in the synthetic resin raw material must be completely removed.

As a conventional method for removing the gas containing moisture in the synthetic resin raw material, there is a drawback that must go through a cumbersome and difficult drying process through a separate drying device, such as a drying method using a multi-stage electric drying furnace or a drying hopper method In addition, in the case of raw materials such as engineering plastics, it cannot be completely dried without vacuum drying. Furthermore, even when such primary vacuum drying is completed, when it is used in a molding machine, it is continuously dried by using a dry hopper or injection. The work must be progressed to obtain the high quality molded products that are needed.

In particular, in order to produce transparent products using acrylic resins, in order to prevent the smog phenomenon of the product, it is necessary to go through a drying process to remove moisture or gas contained in the raw material, rather it is included in the air during such drying process Various impurities are adsorbed on the resin raw material, causing a problem of defective products.

Recently, with the development of raw material and mold technology, the technology of molding is developing day by day, and the products also require various and high precision. The molding process first consists of several millimeters of chips of cylindrical or square shape, with the addition of pigments, stabilizers, plasticizers and fillers to the plastic, ie the compound is placed in the hopper, and there is a heating chamber of the cylinder right in front of the inlet. Styrene resin, polyvinyl chloride, polypropylene, etc., which are the material to be molded by heating by heat transfer and high pressure, are melted, and then molten resin is injected into the mold through a cylinder and a screw to the corner of the mold. As it flows in and solidifies, the mold is separated into two parts, repeatedly producing a solid molding out of the mold.

Molding machines that can mass-produce products through molding technology are used.However, when molding products, gas generated from the molten material generates burn marks, weld lines, bubbles, etc. in the moldings, resulting in poor appearance and post-processing. There is a problem that causes many defects in painting, plating, coating, deposition.

In addition, the input raw material contains air and gas containing water, which causes a problem that the defective rate increases during molding of the product, and when the vacuum pressure is increased to maintain the vacuum inside the cylinder, the forward / backward of the stirring screw The air is sucked into the connecting part of the rod, which causes a serious problem of lowering the vacuum rate.

In order to solve these problems, the inventor of the present invention has developed a "noxious gas collection removal device of a plastic molding machine" as a device for removing the gas generated during plastic molding, has been filed as a patent application No. 10-2008-77926.

Patent application No. 10-2008-77926 is a hopper 10 for storing and supplying the raw material as shown in Figure 1, and the cylinder 20 for moving the raw material introduced from the hopper 10 while stirring with an internal screw And a vent body (30) for extruding the raw material entering through the cylinder (20) with a nozzle, and a nozzle (40) for extruding the raw material and injecting the raw material into a mold, the raw material in the hopper (10). Drying means 50 for drying; The cylinder 20, the vent body 30, and the cap 41a of the nozzle 40 are connected to the pipes 21, 31, and 41 by respective pipes 20, the vent body 30, and the nozzle 40. And gas collection removing means 60 for collectively collecting and removing gas generated in the cap 41a of the cap 41a, and the gas collecting removing means 60 is connected to the pipes 21, 31, and 41. A gas collector 61 for collecting gas generated in the cylinder 20, the vent body 30, and the nozzle 40, and a gas 61 connected to the gas collector 61 by a pipe 61a to combust the gas introduced therein. A combustion coil (67), a cooling coil (68) for cooling the gas discharged by being connected to the combustion heater (67) by a pipe connection coupling (67c), and connected to the cooling coil (68) by piping for cooling. A pump 66 'for pumping the gas drawn by cooling in the coil 68 and a purge gas outlet 69' are provided to the casing through the installation holes 67a and 67b. Chapter is to be removed by the gas generated in the cylinder 20 and the vent body 30 and the nozzle 40, collecting in bulk installed.

Therefore, Patent Application No. 10-2008-77926 is to directly burn the gas at a high temperature by the direct combustion method to remove the high temperature, so the operating cost and maintenance costs are increased.

The present invention is to provide another harmful gas removal apparatus for removing the harmful gas at a relatively low temperature by burning the harmful gas by the decomposition method using a catalyst, unlike the direct combustion method described above.

The present invention has been invented to solve various defects and problems caused by the conventional molding machine in view of the above situation, and an object of the present invention is to collectively collect gas generated in a cylinder, a vent body, and a nozzle during molding into a molding machine. It is a compact device that can be used in local space by burning and collecting harmful gas by decomposition method using catalyst and adsorption by activated carbon adsorption method. It is easy to manufacture device with simple structure with high efficiency of removing harmful gas. The present invention provides a device for removing harmful gases of a plastic molding machine using a decomposition method and an activated carbon adsorption method, which can reduce the price of a product by reducing the time and manpower required for manufacturing and can be easily employed in various molding machines.

Another object of the present invention is to collect and completely remove the gas generated in the cylinder, the vent body and the nozzle during molding into a molding machine to completely eliminate the decomposition process and activated carbon to minimize the defect rate of the product while reducing the manufacturing process The present invention provides an apparatus for removing harmful gases from a plastic molding machine using an adsorption method.

Another object of the present invention is to wrap the lower outer periphery of the hopper with a heat insulating material to prevent the deterioration of the quality such as drying degradation of the raw material or cracking of the product due to uneven drying, and completely remove the gas and moisture generated during molding The present invention provides a device for removing harmful gases in a plastic molding machine using a decomposition method and an activated carbon adsorption method, which can use recycled resins that generate a lot of gas, thereby reducing costs.

Another object of the present invention is to remove the harmful gases such as organic compounds (VOCs) in the raw material to prevent contamination and corrosion of the mold, so that the plastic molding machine using decomposition and activated carbon adsorption can significantly extend the life of the mold. To provide a harmful gas removal device.

Another object of the present invention is to remove the harmful gas at a low temperature by removing the harmful gas by a decomposition method using a catalyst can economically remove the harmful gas by reducing the operating cost and maintenance cost as well as forming the perfect gas removal The gas is not injected into the mold in the subsequent painting, plating, coating and deposition process to minimize the occurrence of defective products, and purifies the various harmful substances contained in the gas to be removed, thereby purifying the air in the factory to prevent environmental pollution. The present invention provides an apparatus for removing harmful gases from a plastic molding machine using decomposition and activated carbon adsorption.

The harmful gas removal apparatus of the plastic molding machine using the decomposition method and the activated carbon adsorption method of the present invention for achieving the above object is a hopper 10 for storing and supplying the raw material, while stirring the raw material introduced from the hopper 10 with an internal screw The cylinder 20 to move, the vent body 30 which extrudes the raw material which enters through the cylinder 20 with a nozzle, the nozzle 40 which extrudes and inject | pours a raw material into a metal mold | die, the air filter 51, and a blower In the molding machine having a drying means 50 for drying the raw material in the hopper 10 composed of a 52 and a heater 53, the heat dissipation of the hopper 10 is installed on the lower outer periphery of the hopper 10 Thermal cover 60 to prevent the; The cylinder 20, the vent body 30, and the cap 41a of the nozzle 40 are connected to the pipes 21, 31, and 41 by respective pipes 20, the vent body 30, and the nozzle 40. It is comprised by the gas collection removal means 70 which collects and removes the gas produced in the inside collectively.

The present invention collects the gas generated in the cylinder, the vent body and the nozzle at the time of molding into a molding machine to burn the harmful gas by the decomposition method using a catalyst and adsorbed by the activated carbon adsorption method to remove the small space that can be used in the local space With the high efficiency of removing harmful gas and simple structure, it is easy to manufacture the device, which makes it possible to reduce the price of the product by reducing the time and manpower required for the manufacture of the device, and can easily adopt it to various molding machines. In addition to improving the quality by shortening the manufacturing process of molded products and minimizing the defective rate of the product, the outer circumferential edge of the hopper is covered with a thermal cover to reduce the quality of the product such as drying degradation during product drying or cracking of the product due to uneven drying. Gas by removing the gas and moisture generated during molding Allowing the use of recycled resin caused a lot of the advantage that can be realized cost savings.

In addition, the present invention can prevent the contamination and corrosion of the mold by removing the harmful gases such as organic compounds (VOCs) in the raw material can significantly extend the life of the mold, and by removing the harmful gas by the decomposition method using a catalyst Hazardous gases can be removed by temperature, which not only eliminates harmful gases economically by reducing operating and maintenance costs, but also by eliminating perfect gas, minimizing and eliminating defects in painting, plating, coating and deposition processes after molding. There is a special advantage that does not cause environmental pollution by purifying the air in the factory by purifying various harmful substances contained in the gas.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the apparatus for removing harmful gas of the plastic molding machine using the present decomposition method and the activated carbon adsorption method.

2 is a block diagram of the harmful gas removal device of the plastic molding machine using the decomposition method and activated carbon adsorption method of the present invention, the harmful gas removal device of the plastic molding machine using the decomposition method and activated carbon adsorption method of the present invention is a hopper (10) for storing and supplying the raw material; A cylinder 20 for moving the raw material introduced from the hopper 10 with stirring therein, a vent body 30 for extruding the raw material entering through the cylinder 20 with a nozzle, and an extrusion of the raw material to a mold In the molding machine comprising a nozzle 40 to be injected into the air, the air filter 51, the blower 52 and the heater 53, the drying means 50 for drying the raw material in the hopper 10, the hopper A heat insulating cover 60 installed at the lower outer periphery of the 10 to prevent heat dissipation of the hopper 10; The cylinder 20, the vent body 30, and the cap 41a of the nozzle 40 are connected to the pipes 21, 31, and 41 by respective pipes 20, the vent body 30, and the nozzle 40. It is comprised by the gas collection removal means 70 which collects and removes the gas produced in the inside collectively.

The thermal cover 60 is to cover the lower outer periphery of the hopper 10 to have a hollow inside to prevent the heat dissipation of the hopper 10 to maintain the temperature of the raw material in the hopper 10 uniformly.

The gas collecting and removing means 70 is connected to the pipe (21, 31, 41) and the gas collector 71 for collecting the gas generated in the cylinder 20 and the vent body 30 and the nozzle 40 and A preheating coil 72 connected to the gas collector 71 by a pipe 71a to preheat the collected gas to the discharge pipe; A combustion heater 73 which combusts the gas introduced by being connected to the preheating coil 72 by piping; A catalyst 74 inserted into an end side of the combustion heater 73 to lower the combustion temperature of the gas; A cooling coil 75 connected to an end of the combustion heater 73 to cool the gas; A cooling fan 76 installed below the cooling coil 75 to cool the cooling coil 75; An activated carbon filter 77 connected to the cooling coil 75 by a pipe to adsorb and remove harmful substances contained in the gas; It is composed of a vacuum pump 78 and a purge gas outlet 79 connected to the activated carbon filter 77 by a pipe to pump the gas derived from the activated carbon filter 77.

Here, a valve may be provided at the front end of the preheating coil 72 and a pressure gauge may be installed at the front end or the rear end of the valve to measure the pressure of the gas flowing in the pipe.

The preheating coil 72 is installed to save energy consumed in the combustion heater 73 by preheating the gas collected in the previous step of the combustion heater 73 by using unnecessary heat of the pipe for discharging the gas.

In addition, the heat of combustion of the gas by the combustion heater 73 is 250 ℃ to 400 ℃, the catalyst 74 may be used as the oxidation catalyst, platinum or iridium, or may be used together with platinum and iridium.

The activated carbon filter 77 is equipped with a spring 77a therein to maintain a constant flow of air flowing through the activated carbon.

Next will be described in detail the action of the harmful gas removal device of the plastic molding machine using the present decomposition method and the activated carbon adsorption method configured as described above.

To operate the molding machine employing the harmful gas removal device of the plastic molding machine using the decomposition method and the activated carbon adsorption method of the present invention, first, by operating various switches of the control panel (not shown), the molding machine, the drying means 50 and the gas collection removing means ( 70). That is, the blower 52 is driven by switching on with the operation of the molding machine and inputting power to the drying means 50 and the gas collecting removing means 70, and the heater 53 is heated.

Accordingly, the molding raw material in the hopper 10 is dried, and the molding raw material dried in the hopper 10 is introduced into the cylinder 20 through the outlet of the hopper 10 and stirred with a screw in the vent body 30. By moving to the nozzle 40 through the mold raw material injected from the nozzle 40 is introduced into the mold through the mold fixing plate (A) to form a mold.

In this mold process, the gas generated in the cylinder 20 and the vent body 30 is collected in the gas collector 71 through the respective pipes 21 and 31, and the gas exiting from the nozzle 40 is cap 41a. ) Is collected in the gas collector 71 through the pipe 41 and flows into the preheating coil 72 through the pipe 71a and is preheated by the heat of the exhaust pipe while passing through the preheating coil 72.

The gas preheated in the preheating coil 72 is introduced into the combustion heater 73 which generates heat and is burned at a temperature of 250 ° C. to 400 ° C. by the action of the built-in catalyst 74, and then cooled by the cooling fan 76. After being cooled by the coil 75, the activated carbon filter 77 is adsorbed to remove various harmful substances contained in the gas.

Gas in which various harmful substances are adsorbed and removed from the activated carbon filter 77 is discharged to the outside through the purge gas outlet 79 by the pumping action of the vacuum pump 78.

While the present invention has been described as a preferred embodiment, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the invention.

1 is a configuration diagram of a harmful gas collection removal device of a conventional plastic molding machine,

Figure 2 is a block diagram of the harmful gas removal device of the plastic molding machine using the decomposition method and the activated carbon adsorption method of the present invention.

<Explanation of symbols for main parts of drawing>

10: hopper 20: cylinder

21: piping 30: vent body

31: pipe 40: nozzle

41: piping 41a: cap

50: drying means 51: air filter

52: blower 53: heater

60: heat cover 71: gas collector

71a: Piping 72: Preheating coil

73: combustion heater 74: catalyst

75: cooling coil 76: cooling fan

77: activated carbon filter 77a: spring

78: vacuum pump 79: purge gas outlet

Claims (5)

A hopper 10 for storing and supplying raw materials, a cylinder 20 for moving the raw materials introduced from the hopper 10 with stirring with an internal screw, and a vent for extruding the raw materials coming through the cylinder 20 with a nozzle. Drying means for drying the raw material in the hopper 10 consists of a body 30, a nozzle 40 for extruding the raw material into a mold, an air filter 51, a blower 52 and a heater 53 ( In the molding machine having 50), A heat insulating cover 60 installed at a lower outer periphery of the hopper 10 to prevent heat dissipation of the hopper 10; The cylinder 20, the vent body 30, and the cap 41a of the nozzle 40 are connected to the pipes 21, 31, and 41 by respective pipes 20, the vent body 30, and the nozzle 40. An apparatus for removing harmful gases in a plastic molding machine using a decomposition method and an activated carbon adsorption method, characterized in that the gas collection removal means (70) for collecting and removing the gas generated in the inside collectively. According to claim 1, wherein the insulating cover 60 is the inner circumference of the lower outer periphery of the hopper 10 to uniformly maintain the temperature of the raw material in the hopper 10 to prevent heat dissipation of the hopper 10 Apparatus for removing harmful gases in a plastic molding machine using the decomposition method and activated carbon adsorption method, characterized in that the covering in the state of the hollow portion. The method of claim 1, wherein the gas collection and removal means 70 is connected to the pipe (21, 31, 41) to collect the gas generated in the cylinder 20, the vent body 30 and the nozzle 40 A preheating coil 72 connected to the gas collector 71 and the gas collector 71 by a pipe 71a to preheat the collected gas to the discharge pipe; A combustion heater 73 which combusts the gas introduced by being connected to the preheating coil 72 by piping; A catalyst 74 inserted into an end side of the combustion heater 73 to lower the combustion temperature of the gas; A cooling coil 75 connected to an end of the combustion heater 73 to cool the gas; A cooling fan 76 installed below the cooling coil 75 to cool the cooling coil 75; An activated carbon filter 77 connected to the cooling coil 75 by a pipe to adsorb and remove harmful substances contained in the gas; It is connected to the activated carbon filter 77 by a pipe and pumps the gas derived from the activated carbon filter 77, and a purge gas outlet 79, characterized in that the decomposition and activated carbon adsorption method using Harmful gas removal device of plastic molding machine. The heat of combustion of the gas by the combustion heater 73 is 250 ° C to 400 ° C, and the catalyst 74 is one of platinum, iridium, or platinum and iridium. Noxious gas removal device of plastic molding machine using decomposition method and activated carbon adsorption method. The method of claim 3, wherein the activated carbon filter (77) is equipped with a spring (77a) therein so as to distribute a constant pressure on the activated carbon to the air flow is constant, characterized in that the decomposition of the plastic molding machine using the decomposition method and the activated carbon adsorption method Degassing device.

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