Production method of flat-shaped heat shrinking tube and production system using same
A production method and production system technology, applied to tubular objects, other household appliances, household appliances, etc., can solve the problems of inability to release, volume reduction, and inability to expand, and achieve the effect of improving product quality
Inactive Publication Date: 2012-10-31
SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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Problems solved by technology
[0004] However, in the process of extruding the above-mentioned heat-shrinkable tube from a round-shaped heat-shrinkable tube to a flat-shaped heat-shrinkable tube, the volume is greatly reduced, and the air in the original round tube flows along the round tube to the direction of the expansion mold, while in the flat-shaped heat-shrinkable tube In the mass production of heat-shrinkable tubes, the length of the flat heat-shrinkable tubes produced at one time is several thousand meters or tens of thousands of meters. More and more air cannot be released, which not only leads to failure of expansion, but also produces defective products
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[0023] In order to describe in detail the technical content, process method, achieved purpose and effect of the present invention, the following will be described in detail in conjunction with the embodiments.
[0024] The production method of the flat heat-shrinkable tube of the present invention comprises the steps of first expanding the unexpanded heat-shrinkable tube through an expansion die, and then extruding the expanded circular tube-shaped heat-shrinkable tube to form a flat heat-shrinkable tube, During the process of expanding the heat-shrinkable tube by the expansion mold, one or both ends of the free end of the unexpanded heat-shrinkable tube and the free end of the expanded heat-shrinkable tube are sucked.
[0025] What needs to be explained here is that the extruding and irradiating steps of the heat-shrinkable tube before expansion are prior art and are not the focus of the present invention, so they are not repeated here.
[0026] Preferably, the method of extr...
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The invention discloses a production method of a flat-shaped heat shrinking tube. The production method comprises the steps of expanding an unexpanded heat shrinking tube by an expanding mold, then extruding the expanded heat shrinking tube to form a flat tube, in the process of expanding the heat shrinking tube by the expanding mold, and exhausting air from one or two ends of the free ends of the unexpanded heat shrinking tube and the expanded heat shrinking tube. The invention also discloses a flat-shaped heat shrinking tube production system using the production method flat-shaped heat shrinking tube. The production system comprises an expanding mold and an extrusion mold and also comprises at least one an exhaust device for exhausting air from the heat shrinking tube. According to the production method and the production system, one or two ends of the free end of the unexpanded heat shrinking tube and the expanded shrinking tube is / are subjected to air exhausting, so that when a round heat shrinking tube is changed to be a flat heat shrinking tube by extrusion, air originally existing in the round heat shrinking tube is exhausted to be released successfully, the smooth expansion can be ensured, and the quality of the heat shrinking tube is improved.
Description
technical field [0001] The invention relates to an expansion method and a production system comprising the method, in particular to a production method of a flat heat-shrinkable tube and a production system of a flat heat-shrinkable tube comprising the method. Background technique [0002] Heat shrink tubing is generally produced by extrusion, irradiation and expansion. At present, heat-shrinkable tubes are available in two forms: round tube-shaped heat-shrinkable tubes (round tubes) and flat-shaped heat-shrinkable tubes (flat tubes). The unexpanded heat shrinkable tube is expanded through the expansion die to form a round tubular heat shrinkable tube, while the flat heat shrinkable tube needs to expand the unexpanded heat shrinkable tube through the expansion die while extruding the expanded heat shrinkable tube. The die is extruded. [0003] Compared with the round tube, the flat tube is not only convenient to transport and reduce the transportation cost because it occup...
Claims
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Inventor 向荣周和平康树峰
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL