SU1311940A1 - Extrusion press for making multivoid particle-board - Google Patents

Abstract

The invention relates to the woodworking industry. The purpose of the invention is to intensify the pressing process by ensuring the removal of the toxic gas-vapor mixture (TPS) in the process of plate production. The press contains manifold 3 with hollow cores. Piping (T) and devices for removal of the TPS are located inside the holders. The T 1 1 is associated with an additional camera 8 for collecting the TPS. At the lower ends of T 11 there are cone-shaped suction nozzles 12. Under the action of pressure created by the punch 18, a formed chipboard 21 emerges from the press with continuous tape. The TPS enters the formed channels in the hollow core 21, where through the nozzles 12 through the open channels T 11 enters the chamber 8, from which it is forcibly removed through a nozzle connected to the exhaust system outside the working area of the room. 3 il. i (О .11 со со N

Description

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The invention relates to extrusion type presses for the manufacture of hollow chipboard and can be applied in woodworking machinery.

The purpose of the invention is to intensify the pressing process by ensuring the removal of the toxic gas-vapor mixture during the manufacture of plates.

FIG. 1 shows an extrusion press, a longitudinal section; in fig. 2 - collector design, general view; in fig. 3 shows section A-A in FIG. one.

The press contains a metering mechanism, side guides 2, a collector 3 including a chamber 4 for supplying a heat transfer fluid, such as superheated water or oil, through pipe 5, camera 6 for draining exhaust heat through a pipe 7 with a device for removing vapor-gas emissions in the form of an additional chamber 8 for collecting the toxic gas-vapor mixture and its withdrawal through the nozzle 9 and the exhaust system 10 connected to the pipelines 11, which are installed along the longitudinal axis of the collector 3. At the lower ends of the pipelines 11 are in particular, the suction nozzles 12. The press has hollow cores in the form of external pipes 13 and internal pipes 14, the channels 15 of which supply the heat transfer medium are formed by the internal surfaces of the pipes 13 and the external surfaces of the internal pipes 14, and the channels 6 for removing the heat transfer medium are formed pipes 14 and the external surfaces of pipelines 11.

The pipes 11 are located inside the formers, and the tapered nozzles 12 are mounted under the formers.

A punch 18 is attached to traverse 17, making reciprocating post-penetration and, in the lower extreme position, penetrates into the press forming channel formed by heating plates 19, outer pipes 13 of the core generators and distance bars 20, which are used to form multi-core chipboard 21.

The press works as follows.

The press mass is metered by the metering mechanism 1 along the side guides 2 into the forming channel of the press formed by heating plates 19, spacers 20 and outer pipes 13 of the collector holders 3 including the chamber 4 for supplying a heat-transfer fluid through the nozzle 5 and feeding it through the channels 15 formed between the inner surfaces of the outer pipes 13 and the outer surfaces of the inner pipes 14, and the removal of waste heat 1940

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the strainer through channels 16 formed between the inner surfaces of the pipes 14 and the outer surfaces of the pipes 11 connected to the chamber 6 and the nozzle 7.

Under the pressure created by the punch 18, which is rigidly connected to the cross-beam 17, and the heat from the surfaces of the heating plates 19 and the outer surfaces of the pipes 13 of the hollow cores, a formed multi-hollow chipboard 21 comes out of the press with a continuous tape.

Since the void-formers of the collector 3 do not extend beyond the lower edges of the heating 19 and are made much shorter, the gas-toxic toxic mixture formed during the hot pressing of the plates containing free formaldehyde or phenol, respectively, when making hollow-core plates on the urea formaldehyde or phenolic binder, enters formed channels in hollow-core slab 21, whence under the action of the vacuum generated by the exhaust ventilation system 10, and e, due to the lower density of the hot vapor-gas mixture, it through the 45-60 ° angle pipes nozzles 12 that reduce the resistance of the gas-vapor mixture input by 4-5 times, through the open channels of the pipelines I1 enters the chamber 8, from which it is forcibly removed through the nozzle 9 connected to the exhaust system 10, outside the working area of the production room. The supply of pipelines 11 by nozzles 12, which reduce the resistance of the toxic gas-vapor mixture to the open channels of pipelines 11, makes it possible to accelerate the removal of toxic gases and thereby ensure their maximum removal when the hollow core 21 is located in the press itself.

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The invention allows the removal of toxic vapor-gas mixtures in the press itself, dramatically reducing their entry into the working area of the production room, which contributes to the improvement of working conditions of workers and increased productivity.

Claims (1)

Invention Formula An extrusion press for the manufacture of hollow-core chipboard, including a press mass dosing mechanism, a guide device, heating plates, a manifold with hollow cores and chambers for feeding and discharging carrier heat, spacer strips, punches and actuator, characterized in that, in order to intensify the pressing process by ensuring the removal of the toxic vapor-gas mixture, the press is equipped with a piping system that is installed along the longitudinal axis of the collector inside hollow cores and are equipped with suction cone-shaped nozzles located under the hollow cores. / O 9 FIG. 2 Fig-.z Compiled by N. Drozdov Editor O. Yurkovetskaya Tehred I. VeresKorrektor M. Pojo Order 1924/16 Circulation 463Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4