EP0004844A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for manufacturing plastic products
Assignee: Individual
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Filing: 1978-12-04
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Granted: —
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Expires: 1998-12-04
Abstract
Abstract A method for manufacturing a plastic product comprising the steps of placing a wax model in a flask, pouring plaster into the flask, heating the flask to melt the wax model, flowing out the melted wax, injecting plastic material and taking out a plastic product when the plastic material has become solid. This method is particularly advantageous in manufacturing an industrial proto-type model, artificial teeth, and the like which have to be made precisely and economically. An apparatus for carrying out the method is also disclosed.
Inventors
- 👤 Yamato Kogure
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:23
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C23/00; B22C9/043; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C45/00; B29C45/17; B29C45/26; B29C45/37; A; A61; A61C; A61C13/00; A61C13/12; A61C13/16; B29C33/44; B29C33/52; B29L; B29L2031/00; B29L2031/40; B29L2031/753; B29L2031/7532; B29L2031/7536
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A method for manufacturing a plastic product , comrpising the steps of: (a) preparing a model made of a material selected from the group consisting of wax, soft plastic and the combinatic thereof, said model having a shape identical to that of the product, (b) placing the model in a flask, (c) pouring plaster into the flask such that the model is totally embedded in the plaster, (d) heating the flask after the plaster has hardened until the model is melted and causing the melted model to flow out of the flask, (e) injecting plastic material into the space previously occupied by the model, and (f) taking out a plastic product from the plaster after the plastic material has become solid.
Claim 2
Independent Claim
121 words
A method for manufacturing a plastic product , comrpising the steps of: (a) preparing a model made of a material selected from the group consisting of wax, soft plastic and the combinatic thereof, said model having a shape identical to that of the product, (b) placing the model in a flask, (c) pouring plaster into the flask such that the model is totally embedded in the plaster, (d) heating the flask after the plaster has hardened until the model is melted and causing the melted model to flow out of the flask, (e) injecting plastic material into the space previously occupied by the model, and (f) taking out a plastic product from the plaster after the plastic material has become solid.
Claim 3
Dependent Claim
26 words
A method for manufacturing a plastic product according to Claim 1, further comprising between the steps of (d) and (e), the step of cooling the flask.
Claim 4
Dependent Claim
31 words
A method for manufacturing a plastic product according to Claim 1, further comprising, between the steps of (d) and (e), the step of applying a plastic releasing agent into the flask
Claim 5
Dependent Claim
36 words
A method for manufacturing a plastic product according to Claim 1, wherein the step (d) of causing the melte model to flow out of the flask is carried out by flushing hot water into the flask.
Claim 6
Independent Claim
69 words
An apparatus for manufacturing a plastic product comprising a flask, wherein: said flask has an upper portion and a lower portion- separable from each other, said upper and lower portions are provided with at least one opening for injecting.plastic material, said upper portion is provided with at least one opening for pouring plaster, and said upper and lower portions are equipped with means for tightly fastening said portions together.
Claim 7
Independent Claim
69 words
An apparatus for manufacturing a plastic product comprising a flask, wherein: said flask has an upper portion and a lower portion- separable from each other, said upper and lower portions are provided with at least one opening for injecting.plastic material, said upper portion is provided with at least one opening for pouring plaster, and said upper and lower portions are equipped with means for tightly fastening said portions together.
Claim 8
Dependent Claim
44 words
An apparatus for manufacturing a plastic material according to Claim 4, wherein: said upper and lower portions are further divided into a plate and a collar respectively such that said plates constitute a top and bottom cover and said collars constitute a side frame.
Claim 9
Dependent Claim
24 words
An apparatus for manufacturing a plastic product according to Claim 4, wherein: said flask is provided with a pipe for circulating temperature controlling substance.
References Cited (Backward Citations)
No citation records indexed.
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