TH36162A - Machinery for heat shrinkable film wrapping - Google Patents

Abstract

DC60 (28/01/41) The machine for wrapping products (11) with film (12) made of heat-shrinkable material consists of a body (13) which contains the lower part (14) of the shrinking chamber, which holds the product (11) to be wrapped in film (12) inside, and a lid (16) which is hinged to the aforementioned body (13) and defines the boundary of the upper part (17) of the shrinking chamber. The heating unit (22) and the air circulation units (26, 27) are placed in the shrinking chamber (14, 17) to create air circulation (29, 30, 31) within the chamber. The air circulation units (26, 27) are placed above the heating unit (22) to at least allow for the An airflow (31) is generated through the heating unit (22) in the direction of the bottom of the shrinking chamber (14, 17) during operation. The machine for wrapping the product (11) with a film (12) made of heat-shrinkable material consists of a body (13) which contains the bottom (14) of the shrinking chamber containing the product (11) to be wrapped in the film (12) inside, and a lid (16) which is hinged to the aforementioned body (13) and defines the boundary of the top (17) of the shrinking chamber. The heating unit (22) and air circulation units (26,27) are placed in the shrinking chamber (14,17) to generate airflow (29,30,31) within the chamber. The air circulation units (26,27) are placed above the heating unit (22) to at least allow for the An airflow (31) is generated that flows through the heating unit (22) in the direction of the bottom of the contraction chamber (14,17) during operation.

Claims (11)

1. The machine for wrapping the product (11) with a film (12) made of heat-shrinkable material consists of a body (13,113) which contains the lower part (14,114) of the shrinking chamber containing the product (11) to be wrapped, which is already wrapped in film (12), and a lid (16,116) which is hinged to the aforementioned body (13,113) and defines the boundaries of the upper part (17,117) of the shrinking chamber, a heating unit (22,122) and an air circulation unit (26,27,127,127) which are placed in the shrinking chamber (14,17,114,117) to create air circulation (29,30,31) within the chamber. It is unique because the air circulation units (26,27,126,217) are positioned above the heating units (22,122). 2. The wrapping machine, as claimed in claim 1, is characterized by the heating unit (22,122) being placed in the lower section (14,114) of the shrinkage chamber within the rear heating chamber (23,123), separated from the chamber containing the product to be wrapped by the wall (24,124). 3. The wrapping machine, as enshrined in claim 2, is characterized by the heating chamber (23,123) being in contact with the lower (14,114) portion of the lower shrinkage chamber and with the upper (17,117) portion of the upper shrinkage chamber through a door-closing opening (25,125). 4. The wrapping machinery, as claimed in Claim 1, is characterized by the air circulation units (26,27,126,127) being aligned with the upper section (17,117) of the shrinkage chamber. 5. The wrapping machine, as enshrined in claim 2, is characterized by the air circulation unit consisting of at least one fan (26,126) operated by a corresponding motor (27,127) and equipped with an impeller (28,128) capable of generating an airflow consisting of axial (29) and radial (30,31) suction flows toward the upper (17,117) of the shrinking chamber and toward the lower (14,114) of the aforementioned chamber, flowing through the heating chamber (23,123), respectively, into the shrinking chamber (14,17,114,117) while the lid (16,116) is closed. 6. The wrapping machine, as claimed in Claim 1, is characterized by the fact that the operation of the air circulation unit (26,27,126,127) is controlled by the closing of the cover (16,116). 7. The wrapping mechanism as claimed in Claim 3 is of the nature that the doors (25,125) are opened by closing the lids (16,116) and closed by opening the aforementioned lids. 8. The wrapping machine, as claimed in Claim 1, is characterized by a heating unit (22,122) consisting of an electrically heating element controlled by a thermostat. 9. The wrapping mechanism entitled under claim 4 is unique in that the air circulation unit (26,27) is integrated with the cover (16) and is assembled into the corresponding end wall of the cover. 10. The wrapping machine as claimed in claim 4 is characterized by the air circulation unit (126,127) being integrated with the body (113) of the machine, and the cover (116) opening at the corresponding rear wall for independent movement relative to the air circulation unit. 11. The wrapping machine, as claimed in claim 1, is characterized by the placement of a porous support (15,115) in the lower part of the shrinkage chamber to support the product (11) to be wrapped while allowing air to flow to the surface of the film (12) covering the product on the aforementioned support (15,115). (Clause 11, page 2, figure 3)