ES2275799T3 - PROCEDURE FOR THE HOLDING OF HANDS OF PIGS IN HOLDING PLATES. - Google Patents

Abstract

Procedure for securing bundles of bristles in carrier inserts made of injected cast iron, which have a front surface and a rear surface away from the front surface, in which the bundles of bristles are inserted into continuous holes between the front surface and the rear surface and melt on the rear surface at its protruding ends of the holes, characterized in that for the insertion of the bristle bundles, in an oblique position that deviates from the perpendicular to the front surface, the intended holes of the carrying inserts with an obliquely inclined interior wall area that at least corresponds to the oblique position of the bristle bundles and an interior wall area opposed to it, and this interior wall area opposite the obliquely inclined interior wall area not It presents no inclination in the same direction.

Description

Procedure for holding bundles of bristles in carrying inserts.

The invention relates to a process for holding bristle bundles in carrier inserts made of Injected cast iron, which have a surface front and a rear surface away from the surface front, in which the bunches of bristles are inserted into holes continuous between the front surface and the rear surface, and merge together on the back surface at its ends outgoing holes. In addition, the invention relates to a brush manufactured by the application of the procedure.

From DE 20006311 U is known hold, for the manufacture of toothbrushes, bundles of bristles on a carrier insert and then weld it with the body of brush. In these brushes the bristle bundles are anchored perpendicularly on the brush head.

If the bundles of bristles should be arranged in the oblique brush head instead of perpendicular, then it part of the holes in the carrying inserts are configured obliquely in correspondence. The carrying inserts They are made of plastic by injected cast iron. For the configuration of the holes in the insert injected casting tool has the spikes corresponding, that cross the cavity. For oblique holes the pins must be sliding, so that the Sliding inserts can be removed from the mold. Because of the great number of bunches of bristles of a brush should be provided in correspondence many sliding powered spikes on the tool. The cost for manufacturing such a tool is extremely tall However, certain are not possible. oblique positions and distances between holes, as trajectories of the sliding driven pins must not interfere.

By the invention a procedure is prepared for the holding of bundles of bristles in manufactured carrying inserts of plastic by injected smelting, which allows, in simple configuration of the injected casting tool, oblique positions and distances between holes almost any for accommodation of bunches of bristles. According to the invention, they mold the holes provided for the insertion of bundles of bristles, in an oblique position that deviates from the perpendicular on the front surface, with an interior wall area obliquely inclined that at least corresponds to the position oblique of the bundles of bristles and with an interior wall area opposite to this one, and this inner wall area opposite to the area of obliquely inclined interior wall has no tilt in the same direction. The interior wall areas opposite to the interior wall areas of the inclined holes obliquely they admit in this way the expulsion of the plaquitas open tool holders, even without the use of sliding powered pins. In the embodiment preferred of the process these inner wall areas are perpendicular to the front surface of the carrier insert. The angle of inclination of the inclined interior wall area obliquely it must not be identical to the angle of inclination of the Bundles of bristles, especially can be somewhat older. The gaps that occur between the inner walls of the holes and the bunches of bristles are filled in anyway with cast bristle material.

With the process according to the invention they are Obviously achievable oblique positions of the bundles of bristles in an angular zone of 10 to 40º. An angle of approximately 15º with respect to the perpendicular on the front surface

Further characteristics and advantages of invention result from the following description of a form of Preferred embodiment with reference to the attached drawings. In the Drawings show:

Figure 1 a sectional view of a head of brush with bundles of bristles inserted perpendicularly;

Figure 2 a sectional view of a tool used in the process according to the invention for the securing bundles of bristles in the carrier insert;

Figure 3 a partial fragmentary view A enlarged from figure 2, and

Figure 4 the same partial fragmentary view with the bunch of bristles inserted.

In the head area of the brush body 10 of teeth shown in figure 1 is formed a recess 12. In This recess 12 is inserted fitted a bearing insert 14. The bearing insert 14 has a number of holes 16, which are configured continuously between the front flat surface 18 and the rear surface 20 away from it. The brush body 10 and the carrier insert 14 preferably consists of a plastic, like polypropylene. Both are manufactured by injected cast iron.

In the toothbrush embodiment shown in figure 1 the bundles 22 of bristles are inserted perpendicular to the front surface 18 of the bearing insert 14 in holes 16. On the side of the rear surface 20 are cast the protruding ends of the bundles 22 of bristles, so the bundles of bristles are anchored in the carrying inserts 14.

With reference to figures 2 to 4, it is explained now the process according to the invention, with which they can hold the bundles of bristles on the carrier insert, that is at an angle that deviates from perpendicular to the surface front of the bearing insert 14.

In figure 2 a bearing insert 14 is placed flat on a guide plate 24. Guide plate 24 it has guide channels 26, which are aligned with holes 16 of the bearing insert 14. A central guide channel 26 is perpendicular to the front surface 18 of the bearing insert 14. On both sides of this central guide channel two are provided guide channels inclined obliquely. The guide channels to a side of the central guide channel have tilt direction contrary to those on the opposite side. In the central guide channel like this as in two adjacent guide channels are inserted in the figure 2 bunches 22 of bristles, so that they protrude a little from the holes 16 on the rear surface 20 of the bearing insert 14. Two of the obliquely inclined guide channels 26 are represented in figure 2 without bunches of bristles for the best representation of the geometric constitution of the insert 14. After the introduction of bunches 22 of bristles in holes 16 of the carrying plates 14 a hot iron 30 is pressed against the ends of the bristles protruding from the surface rear 20, to melt these, forming a continuous layer of molten bristle material on the rear surface 20 of the bearing insert 14.

Figure 3 shows the geometric constitution of the carrying inserts 14 in the area of those holes in which the bundles of bristles are anchored in an oblique position. He continuous hole 16 between the front surface 18 and the rear surface 20 of the bearing insert 14 has a first inner wall zone 16a, which has an angle α of tilt in front of the perpendicular X-X to the front surface 18, which corresponds to the angle of inclination of channel 26, and a section 16b of opposite inner wall, which is parallel to the perpendicular X-X to the surface front 18. The inner wall zone 16a is in the extension of guide channel 26. On the contrary zone 16b of inner wall deviates from the guide direction of channel 26 of guide. Zone 16b must not be exactly parallel to the perpendicular X-X to the front surface 18; without However, it should not be tilted in the same direction as the area 16th interior wall. This ensures that the platelets 14 do not need to manufacture cast iron tool with driven spikes slides for emptying holes 16.

As it is also visible by figure 1, the holes 16 are conically widened at both ends that they flow into the front surface 18 as well as the ends leading to the rear surface 20.

As visible by Figure 4, the bundles 22 of bristles are introduced by the guide channel 26 parallel to the zone 16th interior wall. After tightening the heating iron 30 against the ends of the outstanding bristles on the surface rear 20 the molten bristle material is crushed in the flare at adjacent ends of hole 16. Between the zone 16b of inner wall and bunch 22 of bristles can remain a Small hollow space, but can be filled by bristle material molten. In both cases an anchor of the bundles 22 of sows in oblique position with respect to the front surface 18 of the carrying inserts 14.

Claims (10)

1. Procedure for securing bundles of bristles in carrier inserts made of injected cast iron, which have a front surface and a rear surface away from the front surface, in which the bundles of bristles are inserted into continuous holes between the surface front and rear surface and melt on the rear surface at its protruding ends of the holes, characterized in that for the insertion of the bristle bundles, in an oblique position that deviates from the perpendicular to the front surface, the holes are molded provided with the carrying inserts with an obliquely inclined interior wall area that at least corresponds to the oblique position of the bristle bundles and an interior wall area opposite to it, and this interior wall area opposite the inclined interior wall area obliquely it presents no inclination in it
address. 2. Method according to claim 1, characterized in that the holes are obliquely widened at their ends towards the front surface and towards the rear surface. 3. Method according to claims 1 or 2, characterized in that the inner wall area opposite to the obliquely inclined inner wall area is perpendicular to the front surface of the bearing insert. Method according to one of the preceding claims, characterized in that the supporting plates are placed on a guide plate, which has guide channels for the bundles of bristles aligned with the holes of the bearing inserts, and the bundles of bristles are introduced by These guide channels. 5. Method according to one of claims 2 to 4, characterized in that the heated mass of the molten ends of the bristle bundles is crushed at the obliquely enlarged ends of the holes on the back surface of the bearing inserts. Method according to one of the preceding claims, characterized in that the molten ends of the bristle bundles form a substantially continuous layer on the back surface of the carrier plates. Method according to one of the preceding claims, characterized in that the bundles of bristles are inserted and held at an angle of approximately 10 ° to 40 ° with respect to the perpendicular to the front surface. Method according to one of the preceding claims, characterized in that the bundles of bristles are inserted and held at an angle of approximately 15 ° with respect to the perpendicular to the front surface. Method according to one of the preceding claims, characterized in that the carrying inserts are held in the brush bodies with the bundles of bristles held there. 10. Brush with bearing insert attached to a brush body, which has a substantially flat front surface and a rear surface away from the front surface as well as continuous holes between the front surface and the rear surface, in which bundles of bristles are inserted and their protruding ends of the holes in the rear surface are cast, characterized in that the holes of the bearing inserts are formed from an oblique position that deviates from the perpendicular on the front surface, with a corresponding obliquely inclined interior wall area and a outer wall area opposite to this one, and because this inner wall area opposite to the obliquely inclined inner wall zone has no inclination in the same direction.