DE2028710A1 - Procedure for assembling a hose end fitting - Google Patents

Description

The invention relates to a method for assembling a Schlauoh end fitting, "in which a smooth or grooved nipple is inserted into the associated hose end inserted and a sleeve is pressed onto this

In known fittings of the aforementioned type, there is Metal hose sleeve. The sleeve is in a special tool with pressure stamps on the hose into which the Nipple is already inserted, pressed on «Pressing on takes place under high pressure · After the pressing process, the Hose sleeve deformed like a bead · The beads can be round

109851/1515

ORIGIMAL BATHROOM ..

Tim the hose sleeve run or parallel to the hose axis »There are indentations between the beads Have left behind the eteapel of tools "

The purpose of the scuffing process is to achieve a permanent and sufficient surface pressure between the nipple and the inner wall of the hose. The size of the surface pressure is a measure of the tightness of the connection. A particularly good seal is achieved when the nipple is provided with grooves or a thread at its end located in the hose · The hose | material in the grooves POLAR, whereby the sealing surface between the nipple and hose j enlarged and a form-fitting encryption [bunch is achieved between the two file. [

The disadvantage of the method described above is that j that the initial mass of the Schlnuoh.ee and the above; sleeve arranged eehr must be closely tolerated :, thus a -gleichbleibende surface pressure can \ be obtained at the sealing point · Each tube outer diameter is thus a s suitably adapted sleeve which can be used for another hose i ausaendurohmesser not, · assigned Furthermore must previously used sleeves in a special; ren operation can be produced. They also have to be against

- ■ - - - - - "BAD ORIGINAL, - *

109851/1515

Be protected against corrosion · Sas applying a corrosion protection requires an additional operation · Apart from this, the sleeves cannot be pressed with any desired pressure are pressed onto the hose underneath · Finally, the pressing tools are relative expensive presses required.

The aim of the invention is to create a method in which the production of the sleeves and the pressing onto the hose take place in one operation ο Furthermore should special corrosion protection measures are not required.

The stated object is achieved with a method of the type mentioned in that lächenpressung to provided with the nipple end of the tube a plastic sleeve, under a a sufficient 2?, Is sprayed between the jacket of the nipple and the hose resulting pressure · " ■ * "" - ■ * - -; ■ '' ■ ■ - "■■■". "■ ..

The method according to the invention is illustrated below with the aid of the drawing proximity * explained »

A nipple 1, which is shown here as a tube, but exactly the same also a sealing cone or another connection end.

109851/1515

The nipple Ί \ is at its hose-side end with a thread 1a! Mistake. The hose pre-assembled in this way is inserted into a spray ■

tool 4 inserted, in which one made of plastic: The existing sleeve 3 is sprayed onto the end of the hose in such a way that it covers the end of the hose 2 and part of the nipple 1 completely encompassed "

For the positive connection of the sleeve 3 with the nipple 1 the thread 1a can extend into the sleeve area, so that the material forming the sleeve 3 enters the thread 1a can flow in.

The nipple 1 can, however, also be provided with an upset collar which the sleeve 3 encompasses in a form-fitting manner (not shown)

The injection pressure generated by an injection molding machine, not shown, with which the plastic material forming the nipple 5 into the corresponding cavity of the injection molding tool is injected, can optionally be chosen to be far higher than the pressure applied to the known metal sleeves is exercised

After the sprayed onto the end of the hose has cooled down

10 9 8 5 1/15 15

Nipple 3 can open the tool 4 and the hose to be taken out

For larger quantities of the same hose lines two tools can be used so that the sleeves are sprayed onto both hose ends in one operation can be

When it cools down, it is advantageous to form the sleeve strongly shrinking, possibly glass fiber reinforced plastic is used. A reinforcement can be placed in the sleeve Metal insert should be inserted.

The hose end fitting produced by the method according to the invention is the hose end fitting known so far superior in that fewer process steps are required to manufacture them. Come in addition nor that with a hose with an external braid the sprayed-on sleeve is inserted into the rough mesh surface, which creates a form-fitting bond, which is not possible when using conventional sheet metal sleeves.

109851/1515

Claims (1)

Expectations : (Ί ·) iVerfehren to assemble a hose connector, in which a smooth or grooved nipple is inserted into the associated hose end and onto it a sleeve that forms a positive connection with the nipple is pressed on, characterized in that that on the end of the hose (2) provided with the nipple (1) a plastic sleeve (3) under a one sufficient surface pressure between the jacket of the nipple (1) and the hose (2) resulting in a pressure Form (4-) is sprayed on 2 ·) Method according to claim 1, characterized in that for the plastic sleeve (3) to be sprayed on there is a rigid Material is used or molded into this. 3 ·) Method according to claim Λ or 2, characterized in that a material which shrinks strongly when it cools is used for the plastic sleeve (3) to be sprayed on. 109851/1515