Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method专利检索-杀螺剂农药农作物保护农用化学品和农药专利检索查询-专利查询网

Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method

阅读：505发布：2022-11-05

专利汇可以提供Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method专利检索，专利查询，专利分析的服务。并且Painted blanks as well as extruded or molded objects are exposed to heat-conditioned air by passing through a kiln in which the air is recirculated. The heat convection is intensified and better distributed over the entire width of the kiln by producing transverse layers of a high pressure in the air just before it meets the material. For instance the compression layers may be produced in a continuous series by passing the air through a transverse-flow blower or a series of concentric radial blower wheels with a distance between them to secure air inlet.，下面是Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method专利的具体信息内容。

权利要求

1. The precess of heat-treating objects with air by convection in a kiln, said process consisting essentially of conveying through the kiln the object, wherein the object has a substantially stationary layer of air, and contacting the object with a heat-conditioned pulsating stream of air having a frequency of pulsation sufficient to substantially remove the stationary layer of air on the object.

2. The process of claim 1 in which the stream of air flows in a closed circuit in the kiln.

3. The process of claim 2 in which flow of the stream of air is cocurrent to movement of the object in the kiln.

4. Process of claim 3 consisting essentially of contacting the object with a substantially laminar transverse flow of air after the pulsating stream of air.

5. Process of claim 1 in which the pulsating stream of air is directed at an acute angle relative to a surface of the object.

6. A device for heat-treating an object with air by convection, said device consisting essentially of a kiln, means for conveying the object through the kiln, means for heat-conditioning the air, means for circulating the air through the kiln, means for directing the flow of the air onto the object and means for pulsating the stream of air at a frequency of pulsation sufficient to substantially remove a stationary layer of air on the object.

7. Device of claim 6 in which the air circulates in a closed circuit.

8. Device of claim 6 in which the kiln consists essentially of a channel in which the pulsating stream of air contacts the object, and at least one air bypass channel for recirculating air from one end of said kiln to an opposite end of said kiln.

9. Device of claim 7 having a transverse-flow blower in one end of said air bypass channel, said blower having a width or height corresponding substantially to a width of the channel in which the pulsating stream of air contacts the object so as to provide a substantially uniform distribution of air through the kiln.

10. Device of claim 9 in which the transverse-flow blower is positioned to direct a flow of air directly onto the object.

11. Device of claim 10 in which the air is directed at an acute angle relative to a surface of the material.

12. Device of claim 7 having an air bypass channel above and below the channel in which the pulsating stream of air contacts the object and at least one transverse-flow blower in each bypass channel.

13. Device of claim 11 in which means for heat-conditioning the air are located in each air bypass channel, and there is provided between said heat-conditioning means and said blower a damper for directing air in said bypass channel to space outside said device.

14. Device of claim 13 having at least one air bypass channel at an end opposite to that of the blower, and an excess pressure damper through which air in the bypass channel can be directed to space outside the device in order to reduce velocity of flow of air in the device.

15. Device of claim 14 having a thermoregulating system for controlling all dampers, said system including at least one thermal sensor between the heating means and blower in the bypass channel.

说明书全文

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Method of heat treating by convection objects, such as flat individual blanks, molded pulp articles or continuous webs or threads, for example for plastic fibers, and a kiln for use in the method

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