SU1244030A1 - Device for welding polyethylene film - Google Patents

Description

The invention relates to packaging technology and can be used for welding seams in the manufacture of containers from a polyethylene sleeve.

The purpose of the invention is to reduce energy consumption and increase productivity.

Installation between the casing and the divider of the device for welding the polyethylene film of the air passage ring, making the sleeve from the discs and tubes, some stirring of heating elements, placing the tube for discharging the heated air inside the shell between the discs, and also making the inlet portion of said tube tapering (in the form of a confuser) allows to evenly distribute the air between the body and the divider, to increase the time of air contact with the heating elements, not to reduce energy air flow when moving it from one part of the device to another, and, thereby, increase productivity and reduce heat loss, and, consequently, electricity.

The drawing shows a device for welding a polyethylene film, a longitudinal section.

The device includes a housing 1, a divider 2, between which there is a ring 3 with a hole 4 for the passage of air, a sleeve consisting of two parallel disks 5 and 6 interconnected by tubes 7 in which the heating element 8 is placed, a shell 9 installed between the disks 5 and 6 and the tube 10 placed inside it for the discharge of heated air, the inlet section 11

the second is a confuser. A tube 10 for discharging heated air is fixed to the bottom 12 of the housing 1. The disk 5 of the sleeve (upper) is made solid to isolate the cavity between the inner surface of the divider 2 and the cavity of the shell 9, which are connected through channels in the tubes 7, and the disk 6 (lower) has a central hole 13 for the passage of air into the cavity of the shell 9.

The device works as follows.

Air from the compressor is supplied to the space formed by the upper conical inner surface of the housing and the outer conical surface of the dissector 2 and then through the opening 4 of the ring 3 enters the cavity between the housing 1 and the divider 2. Due to the opening 4 in the ring 3, uniform air distribution is achieved throughout the whole volume cavities. The air flow, hitting the disk 6, changes direction and enters the internal cavity of the dissector 2. During the movement, the air blows through the heated external surfaces of the tubes 7 and the shell 9 and through the channels of the tubes 7 in which the heating element 8 is placed, the cavity between the disk 6 and the bottom 12 of the housing 1, and from there through the central hole 13 in the disk 6 - into the cavity of the shell 9 and through the pipe 10 is fed to the weld welding point. During the movement in the device, the airflow will change its direction four times. As a result, the air is uniformly heated and unproductive heat loss is reduced.

The use of the proposed device reduces the operating costs of electricity by 13%.

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Claims (1)

DEVICE FOR WELDING POLYETHYLENE FILM, comprising a housing, a sleeve with a heating element and a divider, characterized in that, in order to reduce energy consumption and increase productivity, a ring with an opening for air passage is installed between the housing and the divider, the sleeve consists of two disks arranged in parallel and connecting their tubes, and the heating element is located in the latter, while the upper disk is solid, the lower has a central hole, and a shell is installed between the disks, inside which is placed a tube for discharging the heated air, wherein the inlet portion is a converger. Hot 8 ode *