Claims
- 1. A method of producing synthetic resin spinnerettes having orifices each with a smaller diameter portion and a larger diameter portion characterized by vertically extending synthetic filaments passed taut around and fixed to a frame structure vertically separable into upper and lower sections, placing the frame structure in a mold, pour-molding a first layer of thermosetting synthetic resin having a thermal conductivity of 1 .times. 10.sup.-.sup.3 cal.cm.sup.-.sup.1 .sec.sup.-.sup. 1..degree.C.sup.-.sup.1 or less after setting in said mold to a thickness not reaching the junction of said frame sections and allowing it to set, pulling up the upper frame section to stretch the synthetic filaments exposed above the first resin layer, pour-molding a second layer of the aforesaid synthetic resin in the mold and above the first layer and allowing it to set, taking the cured article out of the mold to obtain a resin body surrounding and embedding the synthetic filaments therein, and then removing the filaments to form said orifices.
- 2. A method as claimed in claim 1 wherein the frame structure is removed before the filaments are removed.
- 3. A method as claimed in claim 1 wherein the filaments are removed by being dissolved away with a solvent.
- 4. A method as claimed in claim 1 wherein the filaments are removed by being melted away under heating.
- 5. A method as claimed in claim 1 wherein said resin is selected from the group consisting of epoxy resins, unsaturated polyester resin, methacrylic resin, phenol resins and alkyd resins.
- 6. A method as claimed in claim 1 wherein said synthetic filament is selected from the group consisting of polyamide, polyester, polyolefin or acrylic synthetic filament.
Priority Claims (1)
Number |
Date |
Country |
Kind |
43-37292 |
May 1968 |
JA |
|
Parent Case Info
This is a continuation of application Ser. No. 822,393 filed May 7, 1969 now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
659,788 |
Oct 1951 |
UK |
Continuations (1)
|
Number |
Date |
Country |
Parent |
822393 |
May 1969 |
|