SU1328217A1 - Apparatus for sealing articles with polymeric material - Google Patents

Abstract

The invention relates to the field of chemical engineering and can be used for dosing, mixing and vacuum filling of products with various polymers, for example, compounds based on polymer resins. The aim of the invention is to improve the quality of products by improving the homogeneity of the material and the equal dimension of its supply from the mixer to the casting chamber. To regulate the flow of material into the casting chamber, depending on the vacuum pressure in it, the device has a hose choke, the flow area of which is regulated by the auxiliary system. The latter consists of a dilution converter, working medium pressure regulators, an OR logic unit, and a hose throttle compression chamber. If there is a deviation from the specified vacuum in the filling chamber, the converter reacts to an error by changing the setting to one of the regulators. The latter increases or decreases the movement of the working medium in the compression chamber of the hose throttle. The flow area of the throttles is changed, as a result of which the volumetric flow rate of the material per fill remains the same, despite the change in pressure difference between the mixer and the filling chamber. 1 hp f-ly, 1 ill. (Oh sl o o 00 th

Description

The invention relates to chemical engineering and can be used for dosing, mixing, and vacuum filling of products with various iolimers, mainly viscous, in particular when processing fast-curing compounds based on polymer resins, such as epoxy.

The purpose of the invention is to improve the quality of products by improving the homogeneity of the material and the uniformity of its supply from the mixer to the casting chamber.

The drawing shows a schematic diagram of the device.

The device contains tanks 1 and 2 for components, for example, resin and hardeners, dispensers 3 and 4, mixer 5, filling chamber 6 connected by pipeline 7 to a device for evacuating it and pipeline 8 to a vacuum converter 9, hose choke 10 and logical the element OR 11, the outlet of which is connected to the compression chamber of the throttles 10, and the inputs to the regulators 12 and 13 of the pressure of its working medium, for example compressed air. The hose choke is a body with a fitting for supplying the working medium and an elastic hose sealed in the body from the side of the mixer and filling chamber.

The device works as follows.

At the beginning of operation, the flow area of the throttles 10 overlap, for which a pressurized working medium from the regulator 12 is fed into its compression chamber. A logic element 11 connects the pressure regulator 12 to the compression chamber of the throttles 10 and disconnects the regulator 13. A form with the product (not shown is placed in chamber 6, which is hermetically sealed and connected to a device for evacuating it. After reaching the specified vacuum in chamber 6, throttle 10 is switched to stabilization of pouring, for which a working medium is supplied to its compression chamber pressure from regulator 13, controlled by converter 9, depending on the characteristics of the throttles, vacuum in chamber 6, metering capacity, material viscosity and hydrodynamic parameters of the system.

The dispensers 3 and 4 are turned on, which feed the components from the tanks 1 and 2 through the mixer 5, where the components are mixed.

and through the automatic setting, the gap of the throttles 10 into the chamber 6. The iodach of the material is dried, measured with a constant, determined by the dispensers 3 and 4, the speed and at

Constant pressure in the working zone of the mixer 5. After the required dose of material is supplied, the pouring is stopped, for which dispensers 3 and 4 are turned off, the throttle 10 is closed again. Relieve vacuum

The Q in chamber 6 and upon reaching atmospheric pressure, the shape of the product is removed. The device is ready for the next sealing cycle.

The proposed device makes it possible to increase the equipotential dimension and the metering accuracy, since the pressure in the working zone of the mixer stabilizes with varying parameters of the hermetic process, especially in the switching mode from flow shut-off to material feed. As a result, material homogeneity and product quality are enhanced. The design of the device is simplified, its operation is controlled, its maintenance is maintained and the reliability of operation of the device is increased.

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Claims (2)

1. A device for sealing products with a polymeric material, containing tanks for components, metering devices, a mixer, a filling chamber connected to a device for evacuating them, and pipelines with valves that differ in order to improve the quality of products by improving homogeneity. material and d uniformity of its supply from the mixer to the casting chamber; it is equipped with a regulating device, i.e., a hose choke with a compression chamber, an OR logic element and pressure regulators of the working medium, with an output, of the logic element 0 is connected to the throttle compression chamber, and the inputs are connected to the working medium pressure regulators. 2. The device according to claim 1, characterized in that, in order to increase the accuracy of the automatic control of the supply of material from the mixer to the casting chamber, it is equipped with a vacuum converter, an inlet connected to the cavity of the casting chamber, and an outlet with at least one m of the working medium pressure regulators.