DE2024138B2

DE2024138B2 - DEVICE FOR CARRYING OUT THE PROCEDURE FOR LINING METALLIC HOLLOW BODIES

Info

Publication number: DE2024138B2
Application number: DE19702024138
Authority: DE
Inventors: Fritz 8019 Moosach Steffen
Original assignee: Messerschmitt Bolkow Blohm AG
Current assignee: Airbus Defence and Space GmbH
Priority date: 1968-03-08
Filing date: 1970-05-16
Publication date: 1972-05-10
Also published as: FR2091587A5; DE2024138A1; DE2024137B2; DE2024137A1

Description

Nach dem Hauptpatent werden Duroplaste in 50 Der Stempel 2 der im übrigen nicht näher darfester Form durch Vorverdicluung in erwärmten Ein- gestellten hydraulischen Presse A fluchtet mit der füllgefäßen plastifiziert und infolge anschließender Mittelachse des für eine Auskleidung 27 bemessenen Druckerhöhung durch Düsenöffnungen auf die gleich- Einfüllzylinders 3. Er ragt in diesen Einfüllzylinder 3 falls erwärmten, zu beschichtenden Flächen eines hinein und endet als Ringkolben 4. Dieser umschließt Hohlkörpers aufgepreßt. 55 einen dornartigen Kern 17, der in einer ringförmigen Der zwischen dem tinfüllgefäß und dem Werkstück erhabenen Führung 19 auf der Bodenplatte 18 der (Hohlkörper) eingeschaltete Düsenkörper nach dem Werkstückaufnahme D gehalten ist. In einer Aus-Ausführungsbeispiel des Hauptpatentts gibt in einer nehmung 30 am oberen Ende der Werkstückauf-Ausnehmung an seinem einen Ende dem Einfüll- nähme D ist der auszukleidende Hohlkörper 8 mittels zylinder Führung und Halt und umgreift mit einer 60 eines Flansches 31 formschlüssig geführt,
zweiten Ausnehmung formschlüssig das obere Ende Zwischen der Werkstückaufnahme D und dem Eindes auszukleidenden Hohlkörpers. Zwischen diesen füllzylindcr 3 ist der Düsenkörper 6 mit einer einzigen beiden Ausnehmungen ist im Düsenkörper ein kreisrunden Düsenöffnung 11 eingeschaltet, die von Zwischenboden ausgebildet, in dem Düsenöffnungen dem dornförmigen Kern 17 durchsetzt wird. Der Abkreisförmig angeordnet sind, zwischen denen der 6s stand zwischen der Oberfläche des Kernes 17 und der Zwischenboden in Form von Stegen stehengeblieben Begrenzungskante der DüsenöfTnung 11 ist über den ist. Ein Sackloch im Zentrum des Zwischenbodens gesamten Umfang von gleicher Weite. Die ringförmige cv. lochen diesen DüsenöfTnungcn dient zur Führung Düsenöffnung U verbindet die Preßkammer 34 imAccording to the main patent, thermosetting plastics are plasticized in 50 The stamp 2 of the form, which is otherwise not the most precise, by pre-compression in heated hydraulic press A is aligned with the filling vessels and, as a result of the subsequent central axis of the pressure increase measured for a lining 27, through nozzle openings onto the same filling cylinder 3. It protrudes into this filling cylinder 3 if heated surfaces to be coated one and ends as an annular piston 4. This encloses the hollow body pressed on. 55 a mandrel-like core 17, which is held in an annular guide 19 on the base plate 18 of the (hollow body) switched-on nozzle body after the workpiece holder D, which is raised between the ink filling vessel and the workpiece. In an exemplary embodiment of the main patent, there is a recess 30 at the upper end of the workpiece receiving recess at one end of the filling recess D , the hollow body 8 to be lined is guided in a form-fitting manner by means of a cylinder guide and hold and encompassed by a 60 of a flange 31,
second recess, the upper end between the workpiece holder D and the one to be lined hollow body. Between these filling cylinders 3 is the nozzle body 6 with a single two recesses, a circular nozzle opening 11 is switched on in the nozzle body, which is formed by an intermediate base in which the nozzle-shaped core 17 passes through the nozzle openings. The are arranged in the shape of a circle, between which the 6s stood between the surface of the core 17 and the intermediate base in the form of webs remained the boundary edge of the nozzle opening 11 is over the is. A blind hole in the center of the intermediate floor of the same width over the entire circumference. The annular cv. perforate this nozzle opening serves to guide the nozzle opening U connects the press chamber 34 in the

Einfüllzylinder 3 mit dem Raum, den die Auskleidung 27 im Hohlkörper 8 einnimmt.Filling cylinder 3 with the space occupied by the lining 27 in the hollow body 8.

Einfüllzylinder 3 und Werkstückaufnahme D sind von Heizmanschetten 23 und 25 mit in Stufen schaltbaren Heizwendeln 24 und 26 umgeben. Die Heizmanschette 22 wird mit anderer, vornehmlich geringerer Heizleistung und in anderen Zeitabläufen betrieben als die Heizmanschette 25. Es können für diesen Zweck auch andere, z. B. induktive Heizelemente zur Anwendung kommen.Filling cylinder 3 and workpiece holder D are surrounded by heating jackets 23 and 25 with heating coils 24 and 26 that can be switched in stages. The heating jacket 22 is operated with a different, primarily lower heating power and in different time sequences than the heating jacket 25. For this purpose, other, z. B. inductive heating elements are used.

Bei der Auskleidung des Hohlkörpers 8 wird wie folgt verfahren:When lining the hollow body 8, proceed as follows:

Der Einfüllzylinder 3 wird z. B. mit einer trockenen, körnigen, pulver- oder flockenförmigen Mischung aus einem Kunststoffbinder und Füllstoffen zur Erhöhung der Abriebfestigkeit sowie der Wärmebeständigkeit angefüllt. Hierbei sind der Stempel 2 mit dem Ringkolben 4 entgegen der Pfeilrichtung 35 eingefahren. Durch leichten Kolbendruck in Pfeilrichiung 35 und durch Erwärmung wird das Material zunächst plastifiziert. Beim weiteren Ausfahren des Stempels 2 wird es durch die Düsenöffnung 11 in Pfeilrichtung 36 in den auszukleidenden Hohlkörper 8 eingepreßt. Infolge des Preßdruckes wird die zähflüssige Gießmasse an die Wand des auszukleidenden Hohlkörpers 8 gepreßt und verfestigt sich. Sie haftet nach der Aushärtung als Auskleidung 27 fest an der Innenwand des Hohlkörpers 8.The filling cylinder 3 is z. B. with a dry, granular, powdery or flaky mixture a plastic binder and fillers to increase abrasion resistance and heat resistance filled. Here, the punch 2 with the annular piston 4 are retracted against the direction of arrow 35. The material is first plasticized by applying slight pressure on the piston in the direction of the arrow 35 and by heating. When the punch 2 is extended further, it is pushed through the nozzle opening 11 in the direction of arrow 36 in FIG the hollow body 8 to be lined is pressed in. As a result of the pressing pressure, the viscous casting compound is on the wall of the hollow body 8 to be lined is pressed and solidified. It adheres after hardening as a lining 27 fixed to the inner wall of the hollow body 8.

ίο In der Ausnehmung 30, nahe dem oberen Ende der Werkstückaufnahme D, ist ferner ein elastischer Ring 33, z. B. aus Kunststoff, eingelegt, der als Halterung für ein Gewebe 32 dient, das zur Verstärkung der Gießmasse am Eintrittsende des Hohlkörpers 8 durch Umschlingen des Ringes 33 gehalten wird und in den auszufällenden Raum hineinreicht. Es wird beim Pressen von der plastischen Q- rßmasse durchdrungen und verstärkt nach Erhärten deuelben die fertige Auskleidung 27.ίο In the recess 30, near the upper end of the workpiece holder D, an elastic ring 33, for. B. made of plastic, inserted, which serves as a holder for a fabric 32, which is held to reinforce the casting compound at the inlet end of the hollow body 8 by looping around the ring 33 and extends into the space to be precipitated. It is penetrated rßmasse the pressing of the plastic Q and amplified after hardening deuelben the finished liner 27th

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 a centering point of an elongated mandrel-shaped core which penetrates the hollow body to be lined. When the plasticized casting compound d .rch

1. Device for carrying out the method 5 the openings of the nozzle body are divided by the flow for lining metallic hollow bodies, the Kunstsioff casting compound as a result of the aforementioned especially of pipes, with a thermosetting web between a nozzle opening and the two plastic layer, whereby by pressure and adjacent nozzle openings in several strands, Heat a plasticized plastic casting compound which after passing through these openings as a result of the is pressed through a molding channel, and flow together again at the io pressing pressure. Between the. Duroplastics in solid form by pre-compressing individual strands is, however, a strength warmed filling vessels plasticized and increasing intimate bonding of the casting compound in itself and follow subsequent pressure increase through nozzle - with additional use of reinforcement openings on the likewise heated to loading - with this no longer as present as layering surfaces of a hollow body 15 which is the case within each strand. When press-pressed are, according to patent 1,729,137, such a load is therefore indicated by the lining characterized in that the nozzle cracks in this area lying in the "shadow" of the webs body (6) as an annular nozzle and the core (17) as the and washouts that have been created by the shape of the previously Ring nozzle penetrating mandrel is formed, the nozzle used have been caused.

protrudes into the filling cylinder (3). 20 The present invention serves the purpose of

2. Device according to claim 1, characterized in that it improves the lining: indicates that the punch (2) is formed as an annular piston (4) from the filling cylinder through the nozzle into the is and with its central hollow body to be lined, a molded plastic recess enclosing the core (17) holding. Mass flow should no longer go through the nozzle as before

3. Apparatus according to claim 1 or 2, that 25 are divided into individual strands so that the finished Ausdurch is characterized in that the clothing to be lined is homogeneous over the entire circumference.
Hollow body (8) on an annular raised part according to the invention, this is achieved by guiding (19) for the core (17) on the floor - that the nozzle body sits as an annular nozzle and the core as a plate (18). the ring nozzle penetrating mandrel is formed, the

4. Device according to one of claims 1 to 30 protruding into the filling cylinder.

3, characterized in that in a starting As the thorn-like core in the central position of the

The nozzle opening is not centered on the nozzle body as before (30) of the workpiece holder (D).

If the inner ring (3.1) can be reinforced with fiber reinforcements (32) in the hollow, it is fixed centrally

body (8). in a guide on which the filling cylinder is

35 closing base plate.

According to a further development of the invention, the punch of the pressing device is designed as an annular piston

The invention relates to a device for being formed and enclosing with its central bore

Carrying out the method for lining the mandrel-shaped core.

metallic hollow body, in particular of pipes, with 40. In this way, a through the nozzle is not

a thermosetting plastic layer, with divided flow of the plastic molding compound and thus

Pressure and heat create a plasticized plastic - a completely homogeneous lining.

Molding compound is pressed through a molding channel, and in the drawing is an embodiment of the

in the case of thermosetting plastics in solid form by pre-compression invention in the vertical central longitudinal section

plasticized and placed in heated filling vessels and explained below,

as a result of a subsequent pressure increase through nozzles- The device consists of a hydraulic one

Openings on the likewise heated to be coated press A, a filling device B, one with this

tcndcn surfaces of a hollow body are pressed on, positively connected nozzle body 6 and one

according to patent 1729 137. Workpiece holder D.