| 摘要 |
A hot airflow generation device supplies hot airflows toward a heat-shrinkage film wrapping around an article for heating and shrinking the film to form a package on the article. The hot airflow generation device includes a casing defining a channel through which the article wrapped by the heat-shrinkage film is conveyed. A hood is arranged inside the casing and forms air passages with the casing. Each air passage forms an exit opening. The hood includes walls forming an air intake port in communication with the air passages. An air fan is mounted to the hood for drawing air into the air intake port and driving the air into the air passages. Electric heaters are arranged inside the air passages for heating air flowing therethrough. Air that is drawn into the air intake port and driven through the air passages is heated by the heaters and becomes hot airflow that flow toward the article through the exit openings. The air bounces from the article and is drawn into the air intake port and the air passages again for circulation and being heated again. An airflow guide board is rotatably mounted in each air passage for controlling air flow rate and direction through the associated exit opening.
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