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
  • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
  • B29C51/18—Thermoforming apparatus
  • B29C51/20—Thermoforming apparatus having movable moulds or mould parts
  • B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
  • B29C51/225—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis mounted on a vacuum drum

Definitions

• the present invention relates to a vacuum molding roll structure in which a convex portion is vacuum-formed on a synthetic resin sheet.
• Various types of roll structures have been proposed as vacuum structures for forming convex portions on the surface of a synthetic resin sheet. That is, a concave portion corresponding to the above-mentioned convex shape is engraved on the outer periphery of the roll, a vacuum is introduced into the concave portion, and the above-mentioned synthetic resin sheet ′ which is in close contact with the outer periphery of the mouth is evacuated.
• the above convex portions are formed by suction.
• the purpose of this book is to eliminate such drawbacks.]);
• the purpose is to make the recess of the roll and the vacuum source intermittent and selective, and to simplify the structure.
• To provide an inexpensive vacuum forming roll structure That is, in the present invention, a plurality of vacuum passages extending in the axial direction of the above-mentioned port T and extending therethrough are formed on the same circumference in the thick portion of the hollow roll. And the recesses formed in the outer periphery of the roll are communicated with each other, and the ⁇ -roll shafts provided on both ends of the roll are supported, and the vacuum is engaged with both side surfaces of the roll.
• a side plate is provided, and a groove extending in a circumferential direction at an appropriate length is formed in the vacuum side plate at a position in a radial direction facing the vacuum passage, and a connection between the groove and the vacuum source is formed. Further, a hole having substantially the same area as a hole is formed between the vacuum side plate and the roll side surface at a position facing the vacuum passage on the same circumference.
• a lent meter attach the premetal to the side of the roll, and roll By rotating, the vacuum is introduced into the concave portion of the roll only while the hole of the plain metal is engaged with the groove of the vacuum side plate.
• the vacuum forming ⁇ -rule structure is used in general.
• Fig. 1 shows the book-the mouth showing the actual structure of the mouth-
• Fig. 2 is a cross-sectional view in the direction perpendicular to the roll axis
• Fig. 2 is a cross-sectional view in the roll axis direction showing the main structure of the embodiment
• Fig. 3 shows the shape of the vacuum side plate taken along line A-A in Fig. 2.
• Fig. 4 is a plan view
• Fig. 4 is a call showing another example of pi-le
• FIG. 5 is a plan view showing the shape of the lens meter.
• a plurality of recesses 3 are formed in the outer periphery of the hollow roll 1 in the circumferential direction and the roll axial direction toward the center of the roll.
• a vacuum hole 4 as a vacuum passage communicates with the concave portion 3.
• the vacuum hole 4 is provided in the thick portion 1a of the roll 1 so as to face the concave portion 3, and along the axial direction of the roll 1, as shown in FIG. It is formed through it. '
• the roll shown in Fig. 2 has two roll shafts on both sides of the roll 1.
• the roll shaft 2 is pivotally supported by a pair of vacuum side plates 7 provided on both sides of the roll 1 so as to face each other] 9 and a pairing 10. Further, between the roll 1 and the vacuum side plate 7, a lenticular 5 is interposed.
• This pre-metal 5 is attached to the side of j-roll 1 by screw 11.
• a through-hole 6 having almost the same area as the vacuum hole 4 of the ⁇ -rule 1 is formed in the premetal 5 at a position corresponding to the vacuum hole 4. They are formed on the same circumference.
• the vacuum side plate 7 is paired with the vacuum hole 4 of the roll 1 and the through hole of the premetal 5.
• a groove portion 8 extending an appropriate length in the circumferential direction is formed.
• the width of the groove 8 is formed slightly larger than the diameter of the vacuum hole 4, and the length of the groove 8 can be selected and formed to an appropriate length according to the purpose.
• the vacuum side plate 7 is fixed to the hole body shown in the drawing, and the groove 8 is connected to a connection hoop 9 which is a means for communicating with a vacuum source (not shown). I have.
• the groove portion 8 of the vacuum side plate 7 is positioned at an appropriate position, and the length of the top portion 8 is appropriately selected. Means that the vacuum hole 1 and the groove 8 and 3 ⁇ 4 overlap each other only when they match.) Therefore, vacuum forming is performed only during that time. Further, as described above, since the length of the groove portion 8 can be appropriately selected, the communication length between the vacuum source and the concave portion 3 can be selectively determined. In addition, when the vacuum hole 4 does not overlap with the longevity part 5, the vacuum side plate 7 is in contact with the side surface of the roll 1 via the premetal 5, The communication between the recess 3 of the ⁇ -rule 1 and the vacuum source is surely cut off.
• FIG. 1 An actual example is described separately in FIG. A hollow cylinder 15 is fitted on the inner diameter side of 'roll ⁇ '. Then, the roll 1 'and the hollow cylinder 15 are adapted to be cultivated by the mouth-axis 2]. Hollow
• a groove 16 as a vacuum passage is formed on the outer periphery of the cylinder 15 at a position facing the concave portion 3 'of the roll toward the center of the roll.
• the groove 16 extends through the roll width along the roll axis direction. 1 ⁇ means with the grooves 1 6 and the vacuum source is the same as the above embodiment.
• a hollow cylinder 15 does not need to be made of the same material (generally steel) as the roll 1 ', but it can be aluminum alloy or other similar alloy. It is.
• the vacuum-molded n-roll structure according to the present invention starts with a synthetic resin sheet, and is used to vacuum-form predetermined convex portions on the surface of various film sheets. Useful.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Rolls And Other Rotary Bodies (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=14130176

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (1)

Family Cites Families (2)

• 1981
  • 1981-06-29 JP JP9516681U patent/JPS583219U/ja active Granted
• 1982
  • 1982-06-24 WO PCT/JP1982/000244 patent/WO1983000113A1/ja unknown

Patent Citations (1)

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