JPH0548736B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves vacuum forming a laminated sheet consisting of a thermoplastic resin base sheet layer and a thermoplastic resin adhesive layer to form convex portions, and then bonding the plate. The present invention relates to a method of manufacturing a buffer laminated material having a predetermined outer peripheral shape.

(Prior art) A laminated sheet in which a thermoplastic resin adhesive layer is laminated on a thermoplastic resin base sheet layer is vacuum formed using a vacuum forming mold, and a board such as paperboard is adhered to the vacuum formed body to form a composite. A small tape recorder,
When producing a buffer laminate for packaging cassette tape recorders, etc., as shown in Figure 7, the laminate sheet a is heated and melted in a heating chamber b, and then the thermoplastic resin base sheet layer side is vacuum formed. The laminated sheet a is run below the vacuum forming mold d so as to face the vacuum forming mold d of the laminating device c, and a large number of recesses are formed in the laminated sheet a by the vacuum forming mold d. A molded body e, this vacuum-formed body e
While the is in close contact with the vacuum forming mold d, the board g loaded on the lift table f is pressed onto the molten adhesive layer of the laminated sheet a, and the composite h is transferred to the vacuum forming laminating machine. c, and transported to a trimming room i by a chain, and in the trimming room i, the product is punched and cut using a punching blade j for forming the outer periphery of the product and a dowel or a backing plate k to produce a buffer laminated material having a predetermined outer circumferential shape. did.

In this way, the laminated sheet a is shaped using the vacuum forming die d, and the plate g is composited, and this composite is carried into the trimming chamber i, where the product outer periphery punching blade j and the dowel or When forming the outer periphery of the product by punching the composite with the backing plate k, the position in the trimming chamber may shift by 1 mm to 2 mm during conveyance by the chain, and this shift may cause punching misalignment, resulting in poor precision. It was difficult to manufacture products with high

(Problems to be Solved by the Invention) The laminated sheet a and the plate g are combined into a composite in a vacuum forming and laminating apparatus c, and the composite is taken out and conveyed from the vacuum forming and laminating apparatus c, and in a trimming chamber i, When the outer periphery of the product is punched out using the punching blade j for forming the outer periphery of the product and the contact metal or the contact plate k, there is a problem in that a punching misalignment occurs, making it impossible to manufacture a highly accurate product.

(Means for Solving the Problems) The present invention uses a vacuum forming lamination apparatus in which the outer periphery of the product is cut and formed at the same time as the composite is formed, thereby making it possible to achieve strong adhesion, especially when adhering to form air chambers. A laminated sheet consisting of a thermoplastic resin base sheet layer and a thermoplastic resin adhesive layer having a heat distortion temperature lower than the heat distortion temperature of the base sheet layer resin is attached to the adhesive layer. is heated to a temperature that melts but the base sheet layer does not melt but softens, and then the laminated sheet is vacuum formed with the base sheet layer side facing the upper mold for vacuum forming to form convex portions. The lower mold on which a plate such as paperboard is placed is raised, and the base sheet layer and the plate are bonded through the adhesive layer in a molten state, and the sealed air chamber is connected to the convex part of the laminated sheet. A method for producing a cushioning laminate material, the method comprising forming a composite material with a plate, and then lowering a product forming blade provided in the upper mold for vacuum forming to punch out the outer periphery of the product from the composite material. This is what we provide.

(Example) An example of the present invention will be described with reference to the apparatus shown in FIGS. 1 to 6.

As shown in FIG. 4, a continuous thermoplastic resin adhesive layer 2 consisting of a thermoplastic resin base sheet layer 1 and a thermoplastic resin adhesive layer 2 having a heat distortion temperature at least 15°C lower than the heat distortion temperature of the base sheet layer resin. A strip-shaped laminated sheet 3 is provided, and this laminated sheet 3 is wound around a winding shaft 4 to form a winding body 5 as shown in FIG.
The rolled-out laminated sheets 3 are successively fed into the heating device 6 via guide rolls 7 and 8.

In this case, the laminated sheet 3 is fed out with the base sheet layer 1 on the upper side and the adhesive layer 2 on the lower side.

A laminated sheet 3 consisting of a base sheet layer 1 and an adhesive layer 2 is heated in a heating device 6 to a temperature at which the adhesive layer 2 melts but the base sheet layer 1 does not melt but softens. It is charged into the vacuum forming lamination apparatus 9.

As shown in FIG. 3, the vacuum forming lamination apparatus 9 has an upper mold 10 and a lower mold 11 for vacuum forming,
A large number of molding recesses 12, 12, . Through the chamber 13
is connected to a vacuum pump (not shown) via an intake pipe 15, and on the upper wall portion 10b of the upper mold 10,
A required number of vertical operating cylinders 16, 16, . is fixed and a punching blade 18 is attached.

In this case, the lower ends of the punching blades 18, 18... pass through the insertion holes 19 formed in dots or intermittently in the flat lower surface 10c between the recesses 12, 12 in the lower wall 10a of the upper die 10, and pass through the insertion holes 19 for a required length. It is formed so that it can freely protrude downward.

A board 20 such as paperboard is positioned and placed on the upper surface of the lower mold 11.

Further, a plate loading and supplying mechanism 21 is provided adjacent to the vacuum forming lamination apparatus 9.

The vacuum forming and laminating device 9 is operated, the upper mold for vacuum forming 10 is lowered and comes into contact with the laminated sheet 3, the pressure is reduced, and the convex portion 2 is formed on the laminated sheet 3 by vacuum forming.
2, 22... and rises at the same time.
The plate body 20 is pressed onto the adhesive layer 2 in a molten state to form air chambers 23, 23, and then the vertical operation cylinders 16, 16... are actuated to close the rod 1.
7 is extended and the lower ends of the punching blades 18, 18... are made to protrude downward from the insertion holes 19, 19..., and the air chambers 23,
At a predetermined portion between 23, a punch line 24, which spans the plate body 20, adhesive layer 2, and base sheet layer 1, is formed.
24... is formed into a complex 25.

Next, the punching blades 18, 18... are raised together with the upper mold 10 for vacuum forming, and the lower mold 11 is raised.
is lowered to feed the complex 25 to the right,
Activate the cutting cylinders 26, 26, 26,
It is cut from the punched cut lines 24, 24... to produce high-precision buffer laminates 27, 27... that do not shift.

FIG. 5 shows an example of a complex in plan view.
The cushioning laminated materials 27, 27... are formed in four rows in the width direction, and the punching incision lines made by the punching blades 18, 18... are shown by the imaginary line A, and the inner part of the imaginary line A is the cushioning laminated material 27, 27... This results in laminated materials 27, 27...

Fig. 6 shows that in addition to the punching blade, a hinge part forming blade is provided on the blade body to form hinge bending lines 29, 29, etc. around the four peripheries of the air chamber forming part 28 of the composite. They are formed on the outside of the bending lines 29, 29, respectively, and hinge bending lines 30, 30... and punching cut lines 31, 31... are formed, and are cut off from the punching cut lines 31, 31... to provide buffering. An example of a laminated material for use is shown in a plan view.

In this way, the laminated sheet 3 is vacuum formed using the upper mold 10 for vacuum forming, and the convex portions 22, 22...
At the same time, the plate body 20 is formed by the lower mold 11.
are glued together and cut into a composite 2 by punching blades 18, 18...
Since punch lines 24, 24... are inserted at predetermined portions between the air chambers 23, 23 in 5, the plate body 20
Therefore, these punching score lines 24, 2 can be easily
The product cut from No. 4 has no punching deviation and has high outer circumferential shape accuracy and dimensional accuracy.

In particular, after the plate body 20 of the laminated sheet 3 is crimped, punch lines are made by punching blades 18, 18, etc., so that the adhesive is strong when bonding to form the air chamber, and air leakage is prevented. The air chamber is sufficiently filled with air.

(Effects of the Invention) The present invention provides a laminated sheet consisting of a thermoplastic resin base sheet layer and a thermoplastic resin adhesive layer having a heat distortion temperature lower than the heat distortion temperature of the base sheet layer resin. The laminated sheet is heated to a temperature that melts but softens the base sheet layer without melting, and then vacuum forms the laminated sheet with the base sheet layer side facing the upper mold for vacuum forming to form convex portions and form paperboard. The lower mold on which the equal plate is placed is raised, and the base sheet layer and the plate are strongly bonded through the molten adhesive layer to form an air chamber, and then a product forming blade is used to Since the outer periphery of the product is punched out and the hinged portion is formed, it is possible to manufacture a cushioning laminate with high precision without causing deviations in the outer periphery shape or displacement of the hinged portion.

[Brief explanation of the drawing]

Fig. 1 is a side view for explaining the method of the present invention together with the main parts of the device to which it is applied; Fig. 2 is a plan view of the same;
FIG. 3 is a cross-sectional view showing an outline of the vacuum forming lamination apparatus according to the present invention, FIG. 4 is a cross-sectional view of a laminated sheet, FIG. 5 is a partial plan view of an example of a composite according to the present invention, and FIG. FIG. 7 is a partial plan view showing another example of the composite according to the present invention, and is a schematic explanatory diagram showing a conventional laminating apparatus for vacuum-formed bodies and plate bodies together with related equipment. DESCRIPTION OF SYMBOLS 1...Thermoplastic resin base sheet layer, 2...Thermoplastic resin adhesive layer, 3...Lamination sheet, 6...Heating device, 9...Vacuum forming lamination device, 10...Upper mold for vacuum forming , 11... lower mold, 12... molding recess, 18... punching blade, 20... plate, 23...
... Air chamber, 24, 31 ... Punching cut line, 25
... Composite, 27 ... Cushioning laminate material.

Claims (1)

[Claims] 1 A laminated sheet consisting of a thermoplastic resin base sheet layer and a thermoplastic resin adhesive layer having a heat distortion temperature lower than the heat distortion temperature of the base sheet layer resin,
The adhesive layer is heated to a temperature at which the base sheet layer is softened but not melted, and then the laminated sheet is vacuum formed with the base sheet layer side facing the upper mold for vacuum forming to form convex portions. At the same time, the lower mold on which the plate such as paperboard is placed is raised, and the base sheet layer and the plate are bonded through the adhesive layer in a molten state, and the sealed air chamber is sealed to the laminated sheet. A laminate material for buffering, characterized in that the composite body is formed of a convex portion and a plate, and then a product forming blade provided in the upper mold for vacuum forming is lowered to punch out the outer periphery of the product of the composite body. manufacturing method.