HOUSING FOR DRAW FRAME Russian patent published in 2007 - IPC D01H5/16 D01H1/16 

FIELD: textile industry, in particular, equipment for draw frame.

SUBSTANCE: housing has sound-isolating guard made in the form of drop cover fixed on vibration-active units of draw frame. Sound-absorbing guard is positioned on head part of draw frame having comb planks. Sound-absorbing layers are fixed on inner surface of guard. Thickness of vibration-absorbing layer exceeds that of cover material by 2-4 times. Housing members are mounted on draw frame by means of vibration-isolating rubber layers having total rigidity lower than that of cover. Vibration-absorbing layer is made from elastic vibration-absorbing sheet material having intrinsic loss coefficient of at least 0.2, or composite, or plasticized rubber. Sound-absorbing material for guard consists of members made from basalt-based mineral wool, or mineral wool, or basalt wool, or glass wool lined with glass felt, or foamed polymer such as polyethylene or polypropylene. Sound-absorbing member is lined with acoustically-transparent material such as glass cloth or polymer, said material being applied onto entire surface of said member. Sound-absorbing material for guard may be based on aluminum-containing alloys which are further filled with titanium hydride or air with density ranging between 0.5 and 0.9 kg/m³, and having the following strength characteristics: compression strength ranging between 5 and 10 MPa and flexural strength ranging between 10 and 20 MPa. Sound-absorbing material for guard may be made from soft foamed porous sound-absorbing material such as polyurethane foam or polyethylene foam, or rigid porous sound-absorbing material such as foamed aluminum. Sound-absorbing material may be alternatively made in the form of crumbs of solid vibration-damping materials such as elastomer, polyurethane, or plasticized rubber, said crumbs being placed into enclosure of sound-conducting material. Crumb fractions have optimal sizes ranging between 0.3 and 2.5 mm.

EFFECT: increased efficiency in reducing of noise created during operation of draw frame.

6 cl, 1 dwg