Hot-blast air flow automatic control mechanism for hot-blast air baking oven

Abstract

The invention relates to a hot-blast air flow automatic control mechanism for a hot-blast air baking oven, which belongs to the technical field of air flow control devices. The hot-blast air flow automatic control mechanism comprises a valve body, a throttle actuator and a throttle, and is characterized in that: a first semi-ring sealing socket and a second semi-ring sealing socket are fixedly arranged on the inner wall of a valve cavity of the valve body; the first semi-ring sealing socket corresponds to the second semi-ring sealing socket mutually to form an integral annular body; a plane at the edge position of the throttle is hermetically matched with the first semi-ring sealing socket and the second semi-ring sealing socket; the throttle actuator comprises an acting cylinder, a support, a rotating shaft linkage mechanism and a rotating shaft; the support is fixed on the valve body; an acting cylinder pivot is arranged on the support, and an acting cylinder column of the acting cylinder is connected with the rotating shaft linkage mechanism; the rotating shaft linkage mechanism is connected with the rotating shaft; and the rotating shaft is supported on the valve body and is connected with the throttle. The hot-blast air flow automatic control mechanism has the excellent sealing effect, does not cause energy waste with air leakage and ensures the heating effect of a heating cavity of the hot-blast air baking oven; the throttle does not influence the sealing effect with expansion caused by heat and contraction caused by cold; and the throttle avoids friction phenomenon and damages caused by friction.

Description

technical field [0001] The invention belongs to the technical field of air flow control devices, and in particular relates to a hot air flow automatic control mechanism for a hot air oven, which is configured to deliver high-temperature hot air to the heating chamber of the hot air oven and to transfer low-temperature air to the heating chamber of the hot air oven. On the pipeline leading out of the air, the air flow is adjusted to control the temperature in the heating chamber. Background technique [0002] The above-mentioned hot air oven is mainly used to heat the blank before compression molding, and then put it into a mold for compression molding into a product after heating. As we all know, automotive interior parts, rubber products, plastic products, rubber-plastic composite products, non-woven felts or blankets and packaging materials, etc., are usually heated before molding to soften the green body, and then pressed into shape by a mold. Taking automotive interior ...

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Problems solved by technology

[0005] Although the above-mentioned hot air flow automatic control mechanism has the advantages of relatively simple structure, it has the following disadvantages. One is that internal leakage is easy to occur, because there is a fitting gap between the damper 3 and a pair of damper guide grooves, and the air will flow in the fitting gap, affecting The stability of the temperature in the heating chamber of the hot air oven makes the heating effect of the heated green body uncontrollable, which ultimately affects the quality of the subsequent molded product; second, it is easy to cause external leakage, because when it is configured for the When the low-temperature air drawn from the air in the heating chamber is led out to the interface, the temperature in the heating chamber is also difficult to control due to leakage, and energy waste is also caused; the third is due to the physical phenomenon of thermal expansion and contraction, when the temperature is high, the damper 3 There is a risk of serious friction with the damper guide groove, which will damage the damper 3 or even deform it. When the temperature is low, the gap will increase and the leakage will become more serious

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