Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
  • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
  • B62J1/18—Covers for saddles or other seats; Paddings
  • B62J1/26—Paddings involving other resilient material, e.g. sponge rubber with inflatable compartments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
  • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts

Definitions

• the invention relates to a saddle and a method for its manufacture.
• a known saddle consists of a metal frame on which springs are stretched; A leather or plastic fabric is pulled over the springs.
• Saddles are currently used, which consist of a rigid plastic structure onto which a plastic covering is sintered, which expands in a variable width and has an adequate softness. Such saddles are more comfortable than their predecessors, but have a number of inconveniences for the manufacturer as well as for the user. Because in order to attach the pillow, it is necessary to coat the rigid structure with adhesive and to sinter the pillow onto the structure. The result is a semi-finished product that has a series of smears on the side edges that need to be removed.
• the current rigid structures are almost flat and have an angled simple edge and are used as part of the shape: during the injection, the spreading material penetrates between the metal mold (female) and the edge of the rigid structure, bends this edge and ent ⁇ partially gives way. This is because the pressure exerted on the material at the stage of expansion causes the angled edge to become detached from the female part of the mold by causing the material to escape.
• the object of the invention is to provide a saddle which is improved over the prior art described above. Furthermore, an apparatus and a method for its production are to be created.
• Figure 1 is a view of the finished saddle from below.
• FIG. 2 shows a section through the device for producing the saddle with a saddle lying therein along the section line II-II in Fig. 1.
• FIG. 3 shows a part of the illustration shown in FIG. 2 with a modified form of the wall part forming the negative form.
• the saddle has a base part 1 designed as a rigid structure with a middle part 2.
• the central part is designed in its shape and curvature to match the shape of the underside of the saddle to be formed. It has two webs 8, 9 extending parallel to the plane of symmetry of the central part, which are used to assemble a sleeve for connection to a satellite tube.
• the middle part is surrounded all around by a substantially U-shaped edge 4.
• the middle part has a first surface 11 receiving the actual seat cushion and a second surface 12 facing away from it.
• the middle part is surrounded by a U-shaped edge 4. This is designed in such a way that it is connected with the free end of its first inner leg 10 to the central part and the opening of the U-shaped edge 4 is directed in the direction of the first surface 11.
• the second leg 13 is slightly inclined outwards from the base of the U-shaped edge 4 to the free end.
• the actual seat cushion 3 is molded onto the first surface 11.
• the device for producing the above-described saddle has a female part of a mold 22.
• the wall 5 of the female part of the mold has a negative shape corresponding to the shape of the seat cushion to be formed.
• An outwardly diverging edge region 14 adjoins this shape.
• the wall 5 and the edge region 14 adjoin one another along a line 15.
• the device also includes a stamp 16 which can be moved in a direction parallel to the plane of symmetry of the mold.
• the stamp has a surface facing the mold 22 which is essentially the same as the contour of the second surface 12 with the projecting webs 8, 9 of the base part 1 is.
• FIG. 1 As can best be seen from FIG.
• small lenticular recesses 17 are provided at the points at which a base part 1 to be inserted has the holes 6, 7.
• the shape and dimensions of the female shape 22 along the line 15 correspond exactly to the shape and dimensions of the outer free edge of the second leg 13 of the base part 1.
• the inclination of the edge region 14 is chosen relative to the inclination of the second leg 13 so that it Include a small angle with one another in the manner best seen in FIG. 2 when the base part 1 is inserted with its first surface 11 directed towards the mold 22.
• the surface of the wall of the mold 22 has a structure which corresponds to the structure of the surface of the seat cushion to be formed.
• the mold 22 is first preheated to a temperature in the range from 30 ° to 60 ° C., depending on the material forming the seat cushion.
• the polyol and isocyanate components forming the polyurethane forming the seat cushion are mixed and introduced into the mold 22.
• a reaction temperature develops which is around 100 ° C.
• the base part 1 is placed on the mold 22 from above in the manner shown in FIG. 2 and described above, so that the free edge of the second leg 13 is directed all around at an acute angle against the wall of the mold 22.
• the stamp 16 acts on the base part 1 under pressure on the back.
• the material occupies the entire cavity between the wall of the mold 22 and the first surface 11 of the central part 1 and enters the holes 6, 7 or through them into the lenticular recesses 17. According to one sufficient solidification time, the stamp 16 is withdrawn, and then the finished saddle can be removed from the mold.
• the base part 1 is first placed on the mold 22 in the manner described above, and the material is then introduced through one of the holes in the base plate into the cavity formed until the material fills the entire cavity and through the Holes 6, 7 come out.
• the riveting of the material to the holes 6, 7 then takes place again by placing the stamp 16, as shown in FIG. 2.
• the holes anchor the cushion 3 to the base part 1, which is designed as a rigid structure.
• the embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 2 in that the wall of the mold 22 adjacent to the line 15 has a negative mold 18 of a bead 19.
• the outer edge of the wall part of the mold 22 has a plurality of ventilation channels which are distributed with respect to one another in the circumferential direction and extend as far as into the diverging edge region and which allow trapped gas bubbles to escape from the enclosed cavity.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=11390808

Family Applications (1)

Country Status (3)

Family Cites Families (2)

• 1994
  • 1994-10-05 IT ITPD940167A patent/IT1269005B/it active IP Right Grant
• 1995
  • 1995-07-31 WO PCT/EP1995/003048 patent/WO1996011132A1/de not_active Ceased
  • 1995-07-31 EP EP95929032A patent/EP0731765A1/de not_active Ceased

Non-Patent Citations (1)

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