DE1483935B1 - USE OF A CONFIGURATION CORE FOR THE MANUFACTURING OF HOLLOW BODIES FROM ELASTOMERS FOR UNDERGROUND PITING - Google Patents

Description

1 2

It is from the German Auslegeschriften 1136962 The drawing serves to further explain the

and 1 102 075 known, hollow support body made of rubber invention, namely

or plastic that is filled with gas or liquid F i g. 1 become a vertical section through one can be used as longwall construction elements, hollow support bodies, which are used as longwall constructions. 5 element can serve,

When it comes to the manufacture of vehicle tires, it is important to know. 2 is a diagrammatic view of a rigid, initially a rigid core, the box-shaped core according to the invention, which, according to German patent specification 627 088, contains an inner core made of foam,
may consist of a water-dispersible mass, the F i g. 3 shows a section through the core according to FIG. 2, chalk, clay, clayey sand and an inorganic io F i g. 4 contains a plan view of the same nucleus with its colloid and can be washed out. The clothing with the help of strips and
The use of such very heavy and impact-sensitive cores, however, is a section through a closed core that is sensitive to support during manufacture, which is assembled around a core according to the invention of hollow support bodies, in particular those for covering.
Supporting the hanging wall in mine sections, 15 The hollow support body according to F i g. 1 has a general disadvantage because, due to their high weight, they are my parallelepipedal shape and walls are unwieldy and also easily damaged by a reinforced elastomer. These walls become the best. hen from layers 1 and 2 of cables, one of which

The invention has the task of running one in the cutting plane for the production (cable of one essentially made of elastomer and thread- 20 layer 1), while the other is perpendicular to or wire reinforcement layers existing support of this level are directed (cables of layer 2). hollow body to provide a core that is supported by the upper wall 3, which is in contact with the load The defects described should be free and should also occur sufficiently, is appropriately thicker than the others is rigid. According to the invention, this object is achieved. A flexible air line 6 leads from the solved by that a 25 support hollow body through a metal plate 5 out for the stated purpose. Core is used, which is at least partially made of. On the plate 5 are also the unillustrated units Dissolvable and / or meltable foam and outlet valves for the pressure fluid are present and the cavity of the support body brought little. The tightness of the support hollow body can at least until the end of the assembly, filled with an impermeable inner lining. 30 secures.

The partial or complete removal of the The production of the support hollow body takes place under

After finishing the assembly, the core is not used according to the assembly core 10

only during vulcanization, but also given the invention. According to FIG. 3 one

if possible before or after this. Should the core be the inner core in the form of a neoprene foam block 11

are dissolved, one can abstain from a solution whose density is about 0.3. This

means, such as a mixture of turpentine oil inner core has a central recess 11 α, the

and use ethyl acetate. In order to resolve the issue before later to accommodate the valve arrangement of the support

To enable vulcanization, it is sufficient to use the hollow body. The inner core 11 is of a

Core of the raw rubber wall with the help of an outer rigid hollow core 12 made of polystyrene foam

thin wall of vulcanized rubber to 40 of parallelepiped shape with rounded

isolate. Edges enclosed. The cells of the inner core 11

Polystyrene, for example, can be closed as a foam. The inside of the outside foam suitable, the very low weight with hollow core 12 also has a recess, considerable insensitivity to shock and in relation to the recess 11a of the interior great rigidity connects. Such a 45 core Il is located.

Foam core can optionally also be completely assembled around the hollow support body 13 according to FIG. 5 or partially permanently in the hollow support body. 4 to stay around and thereby protect against flattening or core 11, 12 a layer 14 made of an elastomer even crushing when the support body is formed, the air chamber 15 of the support hollow body becomes leaky or bursts due to overload. Represents 5 °. In the lower wall of this chamber, in view of the very low weight of two valves A and B for introducing the filling liquid foam, a wholly or partially increased speed or for discharging the air is attached. After the core remaining in the supporting body according to the manufacture of the air chamber 15, the reinforcing body weight is only insignificant. strip 16 wound up. The two ends 16 'and

It is often advantageous to use a core, 55 16 "of the strips 16 overlap. Then one

which is laid on the one hand from an outer, rigid, second row of strips 16, which, however

disruptive material, e.g. B. from dissolving and / or perpendicular to the first row. The ends

fusible foam made hollow core and 16 'and 16 "of the strips 16 are mutually

on the other hand from a set made from the foam of an elastomer. The zone 17 at each of the rounded, not

meren manufactured ends, which remain in the hollow support body, are covered by the strips

benden inner core consists. It can also be used to reinforce strip sections.

be moderate, the inner core is made from the foam of a

Elastomers, e.g. B. made of neoprene foam covered with a closed rubber layer that covers a few millimeters

to manufacture these cells. Such an inner core that is several meters thick. Then it becomes that way

after dissolving or melting the outer 65 structure in an autoclave to be there

Core part remains in the support hollow body is for 1 hour and 15 minutes at one

practically incompressible, but still vulcanized at a temperature of 140 ° C,

soft. ■ This also destroys the hollow core 12, while

i 483

rend the inner core 11 remains in the support hollow body.

Claims (3)

Patent claims: 1. Use of an at least partially dissolvable and / or meltable foam existing core for the production of an essentially made of elastomers and thread or wire reinforcement layers existing hollow support body for underground pit lining, such that the core of the cavity of the support body at least until the end of the Contacting fills out. 2. Use of a core according to claim 1, which on the one hand consists of an outer dissolvable and / or meltable foam Hollow core (12) and the other part made of a material made from the foam of an elastomer, in the support hollow body remaining inner core (11) consists. 3. Use of a core according to claims 1 and 2, the inner core (11) from the Foam is made of an elastomer with closed cells. 1 sheet of COPY drawings