Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2000-03-14
2001-10-09
Kuhns, Allan R. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C264S051000, C264S152000, C264S161000, C264S320000
Reexamination Certificate
active
06299806
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method for manufacturing EVA outsoles and the method involves fewer steps and saves more EVA material.
BACKGROUND OF THE INVENTION
A method known to applicant about the steps for manufacturing EVA outsoles is shown in FIG.
1
and includes the following steps:
step 1: mixing EVA, related components and foaming Agent;
step 2: pressing the mixture as mentioned in step 1 to be a plate;
step 3: cutting the plate into strips;
step 4: using a foaming machine to foam the strips;
step 5: peeling a top surface and a bottom surface of each strip;
step 6: shaping the foamed strips to be a desired shape;
step 7: trimming each strip in step 6, and
step 8: heating the skips in step 7 in a mold to forming the strips into ousoles.
This method involves too many steps and only a certain amount of EVA can be utilized because too much EVA material is discarded when peeling the top surface and the bottom surface of the strips.
The present invention intends to provide a method for manufacturing EVA outsole and the steps of the method are fewer than the conventional method and the EVA material can be saved about 30% to 40% of the quantity of EVA material that is used in conventional method.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a method for manufacturing EVA outsoles, comprising the following steps:
step 1: mixing EVA and foaming agent to become a mixture;
step 2: pressing the mixture as mentioned in step 1 to be a plate;
step 3: cutting the plate into strips;
step 4: overlapping the strips to a desired weight;
step 5: heating the overlapped strips in step 4 in a mold to forming an outsole, and
step 6: trimming the outsoles.
The EVA material is not discarded during the steps of the method of the present invention so that the EVA material is used effectively.
The patterns of the outsole can be directly formed in the outsoles by the mold so that it takes less time to manufacture the outsoles.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
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Chen Ching-Chin
Liang Shih-Kan
Chen Ching-Chin
Kuhns Allan R.
Rosenberg , Klein & Lee
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