Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
  • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
  • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
  • B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed

Definitions

• the present invention relates to a transverse stretching apparatus that stretches a belt-like body such as a stretchable film / fiber material network in the lateral direction (width direction).
• FIG. 7 shows a flat belt-like shape shown in Japanese Patent Publication No. 57-330368. It shows a device for stretching the body laterally.
• pulleys 2 and 2 ′ of the same shape and size symmetrically located on the left and right across the center line 1 are cantilevered on the same side, and are driven in the same vertical plane at constant speed and reverse rotation as shown by arrows.
• the pair of left and right belts 3 and 3 ′ are guided from the center line 1 side by a substantially vertical parallel path to the lower semicircles of the pulleys 2 and 2 ′, respectively, in a semicircle or less, and the guide pulley 5 Provided to circulate through 6 or 5 ', 6' o
• the position at which the belts 3, 3 'are detached from the outer periphery of the pulleys 2, 2' is determined by the mounting position of the guide pulleys 5, 5 'with respect to the axis of the pulleys 2, 2', and the tension of the belts 3, 3 ' Is adjusted by raising and lowering the guide pulleys 6, 6 '.
• the lower semicircle of the pulleys 2 and 2 ′ is immersed in the heating bath in the tank 9.
• the cantilever axes of the pulleys 2, 2' are opposite to each other.
• the left and right ears are bent from the surface side with the ear-fold guides 11 and introduced so that these parts are sandwiched between the belts 3 and 3 'and the pulleys 2 and 2', and the belts 3 and 3 ' This part is pressed against the outer circumference of the pulleys 2 and 2 'by the tension of the pulleys and gripped without slipping, and introduced into the heating bath in the tank 9 along the divergent arc orbit as the pulleys 2 and 2' rotate The belt 10 between both ears is stretched laterally until the belts 3, 3 'separate from the pools 2, 2'.
• An object of the present invention is to provide a horizontal stretching device capable of effectively preventing a strip from coming off in view of the above-mentioned conventional technology.
• a lateral stretching apparatus for a belt-like body includes a pair of pulleys that are arranged on substantially the same plane and rotate in opposite directions to each other, and a pair of belts that are bridged over each of these pulleys.
• a lateral stretching apparatus for a band which stretches the band in the width direction by sandwiching the both sides of the band with the pulley and the belt and conveying the divergent spread, the both sides of the band are provided.
• At least one pair of pressing rolls, which press both side edges of the strip against the belt, before the belt is sandwiched between the pulley and the belt, are provided at an angle to the belt.
• the pressing roll may be inclined so that both side edges of the belt are drawn between the pulley and the belt, or may be inclined such that both side edges of the belt are pressed toward the corners of the belt. It is preferable to tilt both, and more preferably, to both.
• the present invention includes a supporting means for supporting the pair of pressing rolls independently and movably in the width direction of the belt-shaped body, and a pressing pressure applying means for pressing the pair of pressing rolls against the corresponding belts with equal pressure. It specializes in doing things. Further, the pair of belts are characterized in that when they are introduced into the pair of pulleys, they are stretched so as to have a divergent trajectory in the traveling direction. BRIEF DESCRIPTION OF THE FIGURES
• FIG. 1 is a perspective view showing a first embodiment of the present invention.
• FIG. 2 is a front view showing the first embodiment of the present invention.
• FIG. 3 is a view taken in the direction of the arrow Z in FIG.
• FIG. 4 is a cross-sectional view taken along the line 1V-IV in FIG.
• FIG. 5 is a front view showing a second embodiment of the present invention.
• FIG. 6 is a front view showing a third embodiment of the present invention.
• FIG. 7 is a perspective view showing a conventional transverse stretching apparatus.
• FIG. 8 is a view showing another conventional transverse stretching apparatus. BEST MODE FOR CARRYING OUT THE INVENTION
• reference numerals 22 and 22 ' denote a pair of stretching pulleys that are arranged substantially in the same plane and are driven to rotate in opposite directions to each other as indicated by arrows.
• a pair of endless belts 23, 23 ′ are wound around the lower half of each of the pulleys 22, 22 ′, and these belts 23, 23 ′ are further connected to guide pulleys 25. , 26 or 25 ', 26'.
• the lower half of the pulleys 22 and 22 ' is immersed in a hot bath 30 of a hot tub 29.
• the guide pulleys 26 and 26 ' are provided above the belt winding start portions of the extension pulleys 22 and 22', and are extended from the guide pulleys 26 and 26 'to the extension pulleys 22 and 22'.
• the distance between the belts 2 3 and 2 3 ′ is For example, it is narrower than the width of a slit film (band) 31 having a large number of slits in the horizontal direction.
• an evening roll 32 which changes the conveying direction of the unstretched slit film 31 to the guide pulleys 26 and 26'.
• Turn rolls 33 are provided on the sides of the stretching pulleys 22 and 22 ′ to take out the elongated slit fins 31.
• Two pairs of pressing rolls 34, 34 ′ and 35, 35 ′ are provided for pressing the side edges of the ears on which no ridges are formed.
• tension springs (pressing force applying means) 41 are fixed at both ends thereof, respectively, so that the second pressing rolls 35, 35' The pressing force is equalized.
• the spring may be replaced with one having a different strength, or the strength of the spring may be changed by a bolt nut mechanism.
• the belts 23, 23' When it is introduced into stretching pulleys 2, 22 ', it is stretched so that it has a divergent trajectory in the direction of travel.
• the first support member 37 (37 ′) is substantially centered in the vertical direction of the support plate 43 (43 ′) via the fixture 42 (42 ′).
• the rotating shaft 40 (40 ') is attached to the lower end of the support plate 43 (43').
• the upper end of the support plate 43 (43 ') is rotatably supported on the shaft 44 (44') of the guide pulley 26 (26 ').
• the rotary shafts 36 (36 ') and 38 (38') of the first and second pressing rolls 34 (34 ') and 35 (35') are slit filters.
• the ears of the room 31 can be drawn between the inner side of the belt 23 (2 3 ') (between the belt 23 (23') and the pulley 22 (22 ')).
• the shaft 38 (38 ') of the pressing roll 35 (35') is pressed to the pressing roll 35 (35 ') as shown in Fig. 4.
• Is tilted inward so that the ears of the strip 31 are pressed toward the corners of the belt 23 (23 ') by ⁇ degrees. ') Is tilted as well.
• the upper and lower pressing rolls are provided in two pairs. However, only one lower pressing pair may be provided, and the surface of the pressing roll may be provided with a lip stopper.
• the slit film 31 is introduced from the horizontal direction, is bent 90 degrees by the turn roll 32, and is directed downward.
• the ears are bent at the first and second pressing holes 34, 34 'and 35, 35', and simultaneously pressed against the velvets 23, 23 'as shown in Fig. 4. It is sent so that it is gripped by the pulleys 22 and 22 'and the belts 23 and 23'.
• the slit film 31 whose ears are gripped is stretched laterally and divergently with the rotation of the pulleys 22 and 22 ', and is inverted at the lower end and further stretched while the belt 23, 2 3 'is released at the point away from pool 22 and 22'.
• the pressing rolls 34, 34 'and 35, 35' are Because the shafts 36, 36 'and 38, 38' are mounted at an angle of ⁇ and ⁇ , the pressing rolls 34, 34 ', 35, 35' and the belt 2 Since the points 3, 3 and 3 'are not in contact with each other, but are in point or line contact, the pressing force is large, and the action of pulling in the ears works to reduce the width of the ears.
• the inclination ⁇ is mainly for increasing the pressing force (force per unit area), and the inclination 0 is mainly for drawing the ears.
• the inclination angles 0 and ⁇ of the shafts 36, 36 'and 38, 38' of the pressing rolls 34, 34 'and 35, 35' are the slit finolem 3 to be extended. 1, the coefficient of friction between the slit fins 31 and the pressing rolls 34, 34 'and 35, 35', the pressing rolls 34, 34 'and 35, 35' The most stable value can be obtained according to the pressing force of the belt, the tension of the belts 23 and 23 ', the line speed, and the like.
• FIG. 5 shows a second embodiment of the present invention, in which a weight (pressing force applying means) 45 is provided instead of the tension spring of the above embodiment. That is, both ends of the wire 46 are locked to the respective rotating ends of the second support members 39, 39 ', and the weight 45 is suspended from the center of the wire 46. As a result, the pressing forces of the second pressing rolls 35, 35 'are equalized.
• FIG. 6 shows a third embodiment of the present invention.
• the same components as those in the first embodiment are denoted by the same reference numerals in the drawings, and description thereof will be omitted.
• belts 47 and 47 ' are connected to guide pools 48, 49, 50 and 51 or pools 48', 49 ', 50' and 51 ', respectively.
• 4 7, 4 7 ′ are arranged to circulate underneath, and the pressing holes 52, 52 ′ are supported by a support member (not shown) so as to be able to slide in the horizontal direction, and the air cylinder ( Pressing force applying means) is urged toward belts 47 and 47 'by means of 53 and 53'.
• the air cylinders 53 and 53 ' are supplied with pressure from a common air supply system. The air is supplied so that the pressing forces of the pressing rolls 52 and 52 'are even.
• the pulleys 22 and 22 ′ for stretching may be arranged not at the same plane but at an angle in a “C” shape.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Treatment Of Fiber Materials (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=26436328

Family Applications (1)

Country Status (3)

Families Citing this family (20)

Citations (2)

Family Cites Families (13)

• 1995
  • 1995-12-28 EP EP95942320A patent/EP0812671B1/en not_active Expired - Lifetime
  • 1995-12-28 WO PCT/JP1995/002772 patent/WO1997024216A1/ja not_active Ceased
  • 1995-12-28 US US08/894,726 patent/US5826314A/en not_active Expired - Lifetime

Patent Citations (2)

Non-Patent Citations (1)

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