Verfahren zur herstellung eines libellenkörpers
The invention concerns a procedure for the production of a spirit level body, which exhibits a tonnenförmigen cavity and markings for a blister inside the partial, the tonnenförmigen cavity which can be filled with a liquid, whereby first with a cylindrical cavity of provided plastic bodies, in particular in a spraying casting process, one manufactures.
Spirit levels of spirit levels consist usually of a spirit level body with a tonnenförrnigen cavity, which is filled with a liquid partly, so that in the liquid a blister is formed, on the basis those the horizontal position of the spirit level be adjusted can. In addition the spirit level body is further provided with markings, which indicate the position of the RST blister for a horizontal adjustment of the spirit level.
A conventional procedure for the production of a such spirit level body consists of manufacturing in a spraying casting process first a Kunststoffk0rper provided with a cylindrical drilling. In the consequence the Zylinderbohrung is tonnenförmig turned off. Subsequently, in-stung into the wall of tonnenförmigen turning two off from each other dissociated, and inserted kreisdngf0rmige slots into the slots of circlips, which serve as marking for the blister in the spirit level.
From the DE 841,219 C it is further well-known to fill out in place of inserting circlips these slots with lacquer.
From one of the remark examples of the DE 1,266,517 B it is well-known in addition to fill the tonnenförmigen cavity as well as the slots trained in it with a solidifying mass and these afterwards with exception of the part finding in the slots by machine cutting treatment again depart.
Task of the invention is it to make a procedure available of the kind initially specified by which the production of a spirit level body with a tonnenfOrmigen cavity and markings for the blister is simplified.
This succeeds to the kind initially specified according to invention with a procedure thus that into the wall of the cylindrical cavity in the places, preferably kreisdngförmige, planned for the markings, slots is in-stung, the wall of the cylindrical cavity and the slots with a dye film will provide and the cylindrical cavity is tonnenförmig turned off, whereby the dye film with exception of that part, which is in the remaining slots is removed.
In relation to the well-known procedures in this way a spirit level body can be manufactured substantially zeitund more material-saving, further ones of advantages and details of the invention be become in the following on the basis the enclosed design described.
In these show the figures 1 to 4 cuts by the longitudinal centre planes of the different stages of a Libellenk5rpers manufactured after that according to invention procedures.
For the production of a spirit level body first in well-known way in a spraying casting process a transparent plastic body 1, for example made of acrylic glass, is manufactured, which exhibits a cylindrical cavity 2.
According to Fig. 2 is in-stung 5 afterwards into the wall 3 of the cylindrical cavity 2 at the places slots 4, planned for the markings, which extend kreisdngförmig around the longitudinal axis of the cylindrical cavity 2.
In the next work procedure color is injected into the cavity 2, whereby the wall 3 of the cylindrical cavity 2 and the slots will provide 4, 5 with a dye film 6, which in Fig. 3 by opposite Fig. 2 thickened lines is suggested. Subsequently, the cylindrical cavity tonnenf0rmig is turned off, whereby itself in Fig. 4 schematically represented, tonnenförmiger cavity 7 results in. When turning the cylindrical cavity off a part of the depth of the slots 4, is taken 5 away whereby the original depth of the slots was so largely selected however that these do not disappear to v011ig when turning off. In the remaining slots also the dye film 6 applied before remains 4, 5 and forms the desired markings, while the remaining color is removed with tonnenförmigen turning of the cylindrical cavity off.
In the consequence the tonnenförmige cavity 7 can be filled with a suitable liquid, whereby an area for a bubble remains, and to be closed. A such spirit level can be built now into a spirit level.
RK 406,307 B IO legend for the Hinweisziffem:
1 plastic body 2 cylindrical cavity 3 wall 4 groove groove 6 dye film 7 tonnenförmiger cavity The method involves providing places in the wall (3) of a cylindrical hollow space (2) for markings, preferably recessed annular slots (4,5). The wall of the cylindrical hollow space and the slots are provided with a colored coating (6) and the cylindrical hollow space is bored-out to form a barrel shape. The color coating is then removed, with the exception of that part, which is found in the remaining slots. 1. Procedure for the production of a Libellenk) rpers, a tonnenförmigen cavity and markings for a blister inside the partial, the tonnenförmigen cavity which can be filled with a liquid exhibits, whereby first with a cylindrical cavity of provided plastic bodies, in particular in a spraying casting process, it is manufactured in the fact characterized that into the wall (3) of the cylindrical cavity (2) in the places planned for the markings, preferably circle-circular, slots (4, 5) to be in-stung, the wall (3) of the cylindrical cavity (2) and the slots (4, 5) with a dye film (6) to be provided and the cylindrical cavity (2) is tonnenförrnig turned off, whereby the dye film (6) also Exception of that part, that itself in the remaining slots (4, 5) rules, one removes. 2. Procedure according to requirement 1, by the fact characterized that to the mistake of the remaining wall of the cylindrical cavity (2) and the slots (4, 5) with a dye film color in with the slots (4, 5) provided cylindrical cavity (2) is injected.
