Metal founding – With signal – indicator or inspection means – Pressure indicating means
Reexamination Certificate
1999-02-12
2001-01-09
Pyon, Harold (Department: 1722)
Metal founding
With signal, indicator or inspection means
Pressure indicating means
C164S456000
Reexamination Certificate
active
06170557
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an automatic testing machine, and more particularly to an automatic machine for testing the performances of the green sand molding.
BACKGROUND OF THE INVENTION
According to the general practice of the casting industry, the test items of the testing of the green sand performance consist mainly of compactibility, permeability, green compressive strength, etc. The conventional green sand performance testing equipments are operated manually such that only one performance test is possible in one operation, and that each test result is recorded manually. It is therefore readily apparent that the conventional machines for testing the green sand performances are inefficient at best. Generally speaking, the conventional machines described above have the shortcomings, which are described hereinafter.
The manual operation of the conventional green sand performance testing machines is prone to human error. Similarly, the manual recording of the test results is bound to result in the incorrect data. As a result, it is often difficult to secure the green sand of high quality for use in the casting. Accordingly, the rejection rate of the cast product is bound to be high.
The manual operation of the conventional machines for testing the green sand performances is rather time—consuming such that one performance test takes about 30 minutes to complete. The manual recording of the test results calls for additional worker, thereby resulting in an increase in the labor cost.
The conventional machines for testing the green sand performances are designed for testing only one performance. As a result, the operators are required to allocate additional capital expenditure for the purchase and the operation of extra machines.
SUMMARY OF THE INVENTION
The primary objective of the present invention is therefore to provide an automatic machine for testing the green sand performances in a cost-effective manner.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a machine designed for automatic testing of the performances of the green sand molding. The automatic machine of the present invention consists of a machine support, a feeding device, a vibration device, a testing device, a detecting device, and a catching device. The feeding device has means for extracting and transporting the green sand, and a funnel located under the transporting means. The green sand is thus transported to the vibration device via the funnel. The green sand is screened in the vibration device such that the selected sand is sent to the catching device, which has a guide slide seat capable of sliding in the bottom of the machine support. The guide slide seat is located over the loading meter. The catching device further has a test piece sleeve of a hollow construction and capable of sliding on the guide slide seat. The test piece sleeve catches the green sand which is sent out by the vibration device. In conjunction with the sliding motion of the guide slide seat, the test piece sleeve is put through the testing device and the detecting device for testing the compactibility and the permeability. The guide slide seat is provided with a discharge port through which the green sand carried by the test piece sleeve is dropped on the loading meter for carrying out the performance test of green compressive strength. The test of various performances of the green sand is automatically done in about one minute. The green sand of high quality is selected efficiently for use in the casting, so as to reduce the rejection rate of the cast product.
The foregoing objective, features, functions, and advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 3638478 (1972-02-01), Dietert et al.
patent: 4784206 (1988-11-01), Sauerman et al.
patent: 4819711 (1989-04-01), Chancellor
patent: 5736632 (1998-04-01), Nishida et al.
patent: 2152414 (1985-07-01), None
patent: 2151960 (1985-07-01), None
Chao-Chi Chang
Chien-Ming Tseng
Chin-Hsing Kang
Ching-Fu Lin
Chuan-Cheng Hung
Liauh W. Wayne
Metal Industries Research & Development Centre
Pyon Harold
Tran Len
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