Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
  • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
  • D03D47/3006—Construction of the nozzles
  • D03D47/302—Auxiliary nozzles
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/27—Drive or guide mechanisms for weft inserting
  • D03D47/277—Guide mechanisms
  • D03D47/278—Guide mechanisms for pneumatic looms
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
  • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
  • D03D47/3006—Construction of the nozzles
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
  • D03D49/60—Construction or operation of slay

Definitions

• the invention relates to a pneumatic weaving machine with a control mechanism for auxiliary nozzles comprising a reed connected by means of a batten mechanism with the main shaft of the weaving machine and consisting of dents fitted with teeth forming a direct guide channel with open profile whose open section is oriented toward the beat-up section, with a plurality of auxiliary nozzles connected to a source of compressed air and arranged, in the pick position of the reed opposite, and in the beat-up position, outside, the open section of the direct guide channel
• auxiliary nozzles fixed to the batten are situated between the pick channel and the reed.
• both the gliders of the pick channel and the auxiliary nozzles completely get out of the shed during the beat-up motion of the batten across the lower warp threads, while during the reverse motion of the batten, both the gliders of the pick channel and the auxiliary nozzles penetrate between the lower warp threads so as to ensure the air guiding required for the next introducing of the weft into the shed Consequently both the gliders of the pick channel and the auxiliary nozzles are during the beat-up in a position under a bar supporting the edge of the fabric being produced
• the repeated penetration of the gliders of the pick channel and of the auxiliary nozzles is not free of problems consisting in the risk for the warp thread to be
• the operating ends of the auxiliary nozzles are situated in the open section of the pick channel, and the air streaming out of these output orifices situated at said operating ends in the direction of the weft pick supports the pick of the weft through said pick channel whereupon, during the movement of the batten into the beat-up, they are retracted into the body they are seated in thus bringing their operating ends to a sufficient distance from the beat-up area and, consequently, outside the edge of the fabric in process of formation protected in this way from being damaged by them.
• the invention aims at eliminating or, at least, at minimizing the drawbacks of the state of art.
• a pneumatic weaving machine with a control mechanism for auxiliary nozzles whose principle consists in that the auxiliary nozzles are fixed on a rocking shaft whose extremities are seated in rocking mechanisms mounted on the frame of the weaving machine and coupled for motion with the main shaft of the weaving machine.
• This arrangement unambiguously positively defining the mutual original position of the auxiliary nozzles and of the reed, also ensures exact timing of the movements of the auxiliary nozzles and of the reed, because the movements of each of these members are derived in common from the movement of the main shaft of the weaving machine
• the rocking shaft is at least at one place between the rocking mechanisms rotatably mounted in a suspension fixed to an upper beam mounted on the frame of the weaving machine and situated above the rocking shaft
• each auxiliary nozzle is connected by means of a hose with an electromagnetic valve mounted on a holder fixed to the upper beam and is through a supply line connected to a source of pressure air
• the rocking mechanisms are connected with the main shaft by indented belts
• FIG. 1 is an axonometric view of a weaving machine with a control mechanism for auxiliary nozzles
• Fig 2 is an axonometric view of the left side of the weaving machine with the control mechanism for auxiliary nozzles
• Fig 3 is a cross section through a part of the weaving machine with the auxiliary nozzle and with the reed in the pick position at the plane A-A shown in Fig 1
• Fig 4 is a cross section through a part of the weaving machine with the auxiliary nozzle and with the reed in the beat-up position at the plane A-A shown in Fig 1
• Fig 5 is a cross section through the rocking shaft with the auxiliary nozzle and with slay shaft with the reed with schematically shown phases of their mutual movement
• Fig 6 shows the path of the relative movement of the auxiliary nozzle with respect to the reed
• Fig 7 shows the envelope defined by the relative movement of the outline of the extremity of
• a pneumatic weaving machine with a control mechanism for auxiliary nozzles shown in Figs 1 and 2 contains a frame 1_ comprising a pair of side walls 1 ⁇ and b and carrying a batten 2
• the batten 2 contains housings 4 of the batten mechanism, the main shaft 5 and a slay shaft 6 arranged in parallel with it
• the main shaft 5 passing along the whole width of the weaving machine is mounted for rotation in the side walls la and lb of the frame and its one extremity is by means of a belt transmission 8 coupled with a torque source consisting of a not shown motor covered by a cover 9
• the main shaft 5 passes through the housings 4 of the batten mechanism and forms an input member of the batten mechanism of each batten mechanism housing 4, while the output member of the batten mechanism of each batten mechanism housing is formed by the slay shaft 6, also passing through all the batten mechanism housings 4 and mounted for reversible rotation in the side walls 1 and b of the frame 1 of the weaving machine
• a reed 3 comprising dents 1_0 situated side by side along the whole length of the reed 3 is mounted on the slay shaft by means of swords 7
• the dents 10 of the reed 3 comprise an upper dent 17 and a lower dent 18, with a free space situated there between and forming along the whole width of the weaving machine a through direct guide channel 19 open in the direction of the beat-up section
• healdframes Seated in not represented healdframes are healds through which warp threads H and 12 pass from a warp beam to a cloth beam
• the mutual movement of the healdframes with the healds produces a shed 15 between the warp threads H and 12 Behind the healdframes of the weaving machine in the direction of the cloth beam, the warp threads H and 12 pass between the dents 10 of the reed 3
• the warp threads H and 12 produce a fabric 14 in the beat-up section 3 in cooperation with a not illustrated weft Behind the beat-up section 13, the fabric 14 is situated on a supporting bar 1 and is further led on a not shown breast beam and cloth roller and is wound on the cloth beam
• Each of the two side walls ⁇ a and lb of the frame 1 of the weaving machine carries one of two frame brackets 27 and 28 and each of the two frame brackets carries one of two rocking mechanisms 29, 30
• Each of the two rocking mechanisms 29, 30 carries one of the extremities of a rocking shaft 24 mounted rotatably therein said rocking shaft 24 forming in this way the output of the rocking mechanisms 29 and 30
• Each of the rocking mechanisms 29, 30 comprises an input shaft 290 and 300 respectively, coupled for motion with its related extremity of the mam shaft 5 of the weaving machine and by means of this also with the drive of the weaving machine
• the extremities of the drive members of the batten 2 and of the rocking shaft 24 are interconnected by constant transmissions so that the common drive of the batten 2 and of the rocking shaft 24 designed in this way constitutes a synchronized motion system
• This arrangement also provides for a bilateral torque transmission from the main shaft 5 to the rocking shaft 24 thus eliminating the negative action of the twisting of the rocking shaft 24
• each input shaft 290 300 of each rocking mechanism 29 30 is by means of each indented belt 3_1, 32 in drive connection with its related extremity of the mam shaft 5
• the drive connection of each input shaft 290 300 of each rocking mechanism 29 30 with their related extremities of the mam shaft 5 is provided by another suitable means
• first extremities of arms 23 whose the other extremities carry a holder 22 of auxiliary nozzles 21 arranged in a row side by side along the whole length of the holder 22 and oriented in the pick position of the reed 3 with their longitudinal axes almost into the central plane of the direct quide channel 1_9
• Their extremities, fitted with output orifices 33, are situated directly in front of the open section of the direct quide channel 19 of the reed 3
• the output orifice 33 of each auxiliary nozzle 21 is situated in the direction into the direct quide channel 19 in the direction of the weft movement during its pick through the direct quide channel 19
• the auxiliary nozzles 2 are situated in the direction into the direct quide channel 19 in the direction of the weft movement during its pick through the direct quide channel 19.
• each arm 23 carries an independent holder 22 which in its turn carries a number of auxiliary nozzles 21 adequate to the length of the holder 22
• each auxiliary nozzle 2 is mounted on a separate holder 22 seated on a separate arm 23 mounted on the rocking shaft 24
• Each auxiliary nozzle 21 is in one of the well-known ways connected to a well-known not represented pressure air source and the pressure air supply to the auxiliary nozzles 21 is controlled in one of the well-known ways
• the extremities of the auxiliary nozzles 21 are situated at an adjustable distance a (see Fig 6) from the rear wall of the direct quide channel 19
• the adjustability of the distance combined with a proper adjustment of the direction of the output orifices 33 of the auxiliary nozzles 21, permits still more to influence the filling of the direct quide channel 19 with pressure air during the weft
• the extremities of the auxiliary nozzle 21 describe a path shown in Fig 7 by an envelope o
• the position of the auxiliary nozzle 2 _ in relation to the reed 3 changes, as shown in the same Fig by the angle ⁇
• the lateral brackets 27 and 28 carry an upper beam 26 having along its whole length between the lateral brackets 27 and 28 suspensions 25 spaced apart, fixed with their first ends on the beam and holding in their opposite ends in one of the well-known ways, permitting the rotary motion the rocking shaft 24
• This arrangement helps to increase the required stability of the rocking shaft 24, in particular by preventing it from sagging between the side brackets 27 and 28
• the distances between the rocking shaft 24 and the lower edge of the upper beam 26 are sufficiently great to ensure appropriate attendance of the weaving machine with the control device of the auxiliary nozzles 21
• the rocking shaft 24 is mounted to rock in five suspensions 25 In the length section of the rocking shaft 24 between each two suspensions there is seated on the rocking shaft 24 in the above described manner a system of three arms 23 with the holder 22 of the auxiliary nozzles 21 Between each end suspension 25 and its adjoining rocking mechanism 29 or 30 the rocking shaft 24 is fitted with a pair of said arms 23
• the auxiliary nozzles 21 are by means of a hose 34 entering an electromagnetic valve 35 mounted on a holder 350 fixed to the upper beam 26 in combination with a supply line 36 coupled with a pressure air container connected to a pressure air source
• the pressure air container is made as a well-known air chamber 37 as illustrated in Figs 3 and 4
• the weaving machine with the control mechanism for auxiliary nozzles according to the invention operates as follows
• the reed 3 is situated in the pick position, the shed 15 is opened, and the lateral input of the direct quide channel 1_9 situated inside the shed 15 is oriented opposite the mouth of the main nozzle 20
• the auxiliary nozzles 21 located apart and in the above stated position relative to the direct quide channel 19, as is shown in Fig 3 where these auxiliary nozzles 21 in this pick position of the reed 3 pass through the system of the upper warp threads H
• the reed 3 After the beat-up, the reed 3 returns from its beat-up position to its pick position and a new shed IjS is created Simultaneously with said return movement of the reed 3 from its beat-up position to its pick position, the rocking shaft 24 as well turns back to its pick position so that the auxiliary nozzles 2J_ penetrate back into the system of upper warp threads 1_1 while mowing downward in relation to the reed 3 (see Fig 5 ) and resume with their longitudinal axes and extremities equipped with the output orifices 33 the above described pick position directly opposite the open side of the direct quide channel 1_9 of the reed 3

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=5467785

Family Applications (1)

Country Status (4)

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Family Cites Families (5)

• 1997
  • 1997-12-23 CZ CZ19974183A patent/CZ290564B6/cs not_active IP Right Cessation
• 1998
  • 1998-12-10 WO PCT/CZ1998/000048 patent/WO1999034047A2/en not_active Application Discontinuation
  • 1998-12-10 AU AU13315/99A patent/AU1331599A/en not_active Abandoned
  • 1998-12-10 EP EP98956769A patent/EP1042547A2/de not_active Ceased

Non-Patent Citations (1)

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