JPH0761164A - Thermal fusion-bonding apparatus - Google Patents

Abstract

PURPOSE:To improve binding performance by uniformly applying an applied pressure by forming a coating layer arranged on pressurized surfaces of a pair of molds for heating and pressurizing a part to be bound of a laminate to thermally fusion-bond of an uneven ceramic layer and a fluorine resin layer. CONSTITUTION:Parts 90 to be bound at an end of a laminate 9 having a plurality of sheets are introduced between a pair of molds 11 and 21 in which a coating layer 3 having excellent peelability from a surface of the laminate 9 is arranged on an entire pressurized surface. Both the molds 11 and 21 are oppositely approached to one another thereby to thermally fusion-bond the parts 90 to be bound. In this case, the layer 3 is formed of a ceramic layer 31 in which its surface is connected to the pressurized surfaces to become finely uneven and a fluorine resin layer 32 covered to be connected to the surface of the layer 31. Thus, extension of an edge of the layer 31 from outside of the molds 11, 21 is prevented, a thickness of the layer 31 is held uniform, the applied pressure is uniformly operated to improve its binding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat welding device for a calendar in which a plurality of calendar sheets are laminated by heating and pressing at predetermined positions at the ends of the laminate.

[0002]

2. Description of the Related Art As a calender of a type in which a bound portion at an end of a laminated body in which a plurality of calendar sheets are stacked is bound by heat welding, the bound portion is cross-sectioned as shown in FIG. A binding portion (91) is formed by binding in a crank shape, and a locking hole (92) is provided at the center of the binding portion (91).
Further, it is proposed that a perforation (93) is formed below this. Since this structure does not require the conventional binding metal fittings, the structure of the calender can be simplified and the inconvenience that the binding metal fittings remain after incineration can be eliminated.

Japanese Patent Application No. 5-49694 has already been proposed as a heat welding device used for manufacturing such a calendar. As shown in FIG. 2 and FIG. 3, this product has a fluorine resin layer serving as a coating layer (3) having excellent peeling property, over the entire pressing surface of the molds (11) (21) which are vertically opposed to each other. In the case of this one, the heat-welding ink or the like is applied to the binding part (90) at the end of each calendar sheet, and the stack (9) is covered with the ink. The binding part (90) is heated by a heater to the mold (11) (21)
Inserted in between, the one mold (21) is brought close to the other mold (11) so as to be pressurized. Then, due to this pressing force, the bound portion (90) is formed into a crank shape in cross section that matches the cross sectional shape of the molds (11) and (21), and is heat-welded in this state to form the binding portion. (91) is formed. At this time, the molds (11) and (21) are pressed against the surface of the laminate (9) under heating conditions. Since the pressed surface is covered with the fluororesin layer, the above-mentioned thermal welding is performed. Inks and laminates
It is difficult for the components on the surface of (9) to adhere.

However, in this prior art,
Poor binding is likely to occur in the binding section (91). The fluororesin layer as the coating layer (3) has a uniform thickness on the surface of the mold (11) (21) with its edges aligned with those of the mold (11) (21). It is covered. However, in order to surely heat weld the calender sheets by heating and pressing each other,
Since it is necessary to press the bound portion (90) with a very large pressure (about 300 Kgf / cm ² ) by the molds (11) and (21), when this binding operation is repeatedly performed, the result shown in FIG. 4 is obtained. As shown, the coating layer (3) made of a fluororesin layer is spread, and the edge of this coating layer (3) protrudes to the outside, resulting in uneven coating layer thickness. . That is, the mold (1
1) The thickness at the center of the cross section of (21) is different from that near both ends.

When the binding operation is executed in this state,
The pressing force does not act uniformly on the binding portion (91), which results in defective binding. If the bonding between the fluororesin layer as the coating layer (3) and the surfaces of the molds (11) and (21) is insufficient, the above disadvantage becomes more remarkable. The present invention has been made in view of the above point, and describes "the bound portion (90) at the end of the laminate (9) in which a plurality of sheets are laminated.
A pair of molds (1) in which the entire pressing surface is covered with a coating layer (3) having excellent releasability with respect to the surface of the laminate (9).
1) (21), and insert one mold (21) into the other mold (1
In order to prevent defective binding in a heat welding device that heats and presses the laminated body (9) by facing it to the side (1) to bind the bound portion (90) in a heat welded state ''. The task is to do.

[0006]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is to "bond the above-mentioned coating layer (3) to the pressing surface of the molds (11) and (21) and form fine irregularities on the surface. Ceramic layer
(31) and the fluororesin layer (32) which is coated and bonded to this surface. ”

[0007]

The above technical means operates as follows. The bound part (90) at the end of the laminated body (9) in which a plurality of sheets are laminated
Is charged between a pair of molds (11) and (21), and the one mold (2
When the laminated body (9) is heated and pressed by bringing the (1) close to the other mold (11) side, the bound portion (90) is bound in a heat-welded state.

At this time, since the surface of the coating layer (3) formed on the pressing surfaces of the molds (11) and (21) is a fluororesin layer (32), the coating layer (3) has a laminated body. It is difficult for the components on the surface of (9) to adhere. Further, since the surface of the ceramic layer (31) has many fine irregularities and is sufficiently roughened, the fluororesin layer (32) enters the irregular surface of the ceramic layer (31). It is combined with the state.

Therefore, even when the above-mentioned spreading force acts on the fluororesin layer (32) when the laminated body (9) is heated and pressed by the molds (11) and (21), the ceramic layer (31) Fine unevenness of the exerts a spreading prevention force. From this, even if the binding operation is repeatedly executed, the edge portions of the fluororesin layer (32) do not protrude outside the molds (11) and (21), and the molds (11) and (21) The state where the cross-sectional center of () and that near both ends match is maintained.

[0010]

[Effect] Even if the binding operation is repeatedly executed, the edge portion of the fluororesin layer (32) does not protrude to the outside of the molds (11) and (21), and the fluororesin on the surfaces of the molds (11) and (21) Since the thickness of the layer (32) is kept uniform, the pressing force is uniformly applied to the binding portion (90) of the laminate (9), so that no binding failure occurs.

[0011]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. In this embodiment, the present invention is applied to a calender binding device. In this calender, as shown in FIG. 5, a stack (9) in which a predetermined number of calender sheets are stacked is a charging device (6). The stacked body that is put into the binding device by the binding device and is bound by the binding device
(9) is adapted to be transferred by a transfer device (7) to a post-processing portion for processing the locking hole (92) and the perforation hole (93) shown in FIG. 1, and the binding device and the transfer device. A stopper (5), which is reciprocally driven by an air cylinder (51) to a positioning position and a retreat position, is provided between (7) and (7).

The binding device includes upper and lower pressure members.
(1) and (2) are vertically opposed to each other.
(2) is held by a guide shaft (not shown) provided in the frame of the binding device so as to be able to move up and down, and is driven up and down by a hydraulic cylinder (4). The upper pressure body
(1) is a fixed bed (13), a heating block (12) with a built-in heater (121) (121) fixed to the lower surface, and a mold (11) fixed to the lower surface. The other lower pressurizing body (2) is a heating block (2) having a movable bed (23) and heaters (221) (221) fixedly attached to the upper surface of the movable bed (23).
2) and a mold (21) attached and fixed to the upper surface.

The molds (11) and (21) are plate-like members which are long in the direction perpendicular to the paper surface in FIGS. 5 and 6 and whose length is set longer than the lateral width of the calendar. Mold
A groove (101) having a trapezoidal cross section is provided in (11), and a convex strip (201) having a trapezoidal cross section suitable for the groove (101) is provided in the lower mold (21) along the longitudinal direction thereof. Are arranged. Also, the total thickness of 30μ to 40μ is applied to the entire pressing surface of these molds (11) (21).
As shown in the partially enlarged view of FIG. 7, this coating layer (3) is coated with the coating layer (3) of FIG. ~ 20μ ceramic layer (31)
And a fluororesin layer (32) having a thickness of 15 to 20 .mu. It is most suitable that both the ceramic layer (31) and the fluororesin layer (32) have the same thickness.

The molds (11) and (21) are clamp plates (8) and (8) fixed to the side walls of the heating blocks (12) and (13) with screws.
By the above, the pressure is held in the above-mentioned attached state. The stack (9) is loaded between the mold (11) and the mold (21) by the charging device (6), and when the tip of the stack (9) contacts the stopper (5), the hydraulic cylinder In this embodiment, the tip of the laminated body (9) is brought into contact with the stopper (5) between the stopper (5) and the molds (11) and (21) in order to advance the operations of (4) and so on. A sensor (not shown) for detecting this is provided.

Then, the operation of each section is executed based on the detection output of this sensor. Further, in this embodiment, each unit is configured to be controlled by a microcomputer such as a sequencer, and is configured to execute a control program based on the flowchart shown in FIG. Less than,
The operation of the embodiment having the above configuration will be described based on the flowchart.

When the operation is started, each part is set to the initial state. That is, the belts of the feeding device (6) and the transfer device (7) are in a running state, the air cylinder (51) is positively driven, and the stopper (5) is set at a position where it blocks the transfer path of the stack (9). . Also, the hydraulic cylinder (4) is set so that its output shaft is retracted, the mold (21) is at the bottom dead center position, and the heaters (121) (221) are energized and the molds (11) (21) are energized. Is in a heated state.

In this state, when the stacking device (9) is loaded by the loading device (6), the sensor detects this when the front end of the stacking device (9) contacts the stopper (5). As a result, the hydraulic cylinder (4) is positively driven and the mold (21) is driven to the mold (11) side, and the bound portion (90) at the tip of the laminate (9) is pressurized. It will be in a state of being. Then, the pressure applied by the molds (11) and (21) is maintained for a certain period of time, and the binding of the bound portion (90) is completed by the conduction heat from the heaters (121) and (221).

At this time, the coating layer (3) formed on the pressing surface of the mold (11) (21) is covered by the fluororesin layer (32) on the surface.
It is difficult for the components on the surface of the laminate (9) to adhere to (3). After this, the hydraulic cylinder (4) is driven in reverse and the mold
Since the air cylinder (51) is driven in reverse and the stopper (5) retracts downward as (21) descends, the stack (9) after binding is completed is in the running state in the loading device (6). The belt and the pinch roller (61) in contact therewith are sent to the transfer device (7) side for a predetermined time, and the laminate (9) is immediately transferred to the next punching part. It

After this, the air cylinder (51) is positively driven, and the stopper (5) returns to the position where it blocks the transfer path of the laminate (9). Next, when a new laminated body (9) is put in, the sensor detects it, and thereafter the series of operations described above is executed. In this way, every time the laminated body (9) is loaded into the binding device, the series of operations of positioning-binding-discharging is continuously and surely executed.

When the above-mentioned binding operation is performed for a long period of time and the fluororesin layer (32) is worn down to the tips of a large number of irregularities formed on the surface of the ceramic layer (31), as shown in FIG. It will coexist with the ceramic layer (31) on the same plane, but due to the excellent wear resistance of ceramic,
Wearing of the fluororesin layer (32) is prevented more than this. However, if the use is further continued, abrasion of the fluororesin layer (32) and the ceramic layer (31) cannot be avoided, but in this case, by loosening the mounting bolts of the clamp plates (8) (8) described above, Since the molds (11) and (21) can be removed in the longitudinal direction, they can be immediately replaced with new molds (11) and (21).

Incidentally, in the above embodiment, the concave groove (101) is formed in the mold (11).
The ridge (201) was formed on the mold (21), but the concave groove (101)
And the ridge (201) are reversed and the ridge (201) is
The groove (101) may be formed in the mold (21) of the (201).

[Brief description of drawings]

FIG. 1 is a perspective view of a calender in which a binding portion (91) is formed by heat welding.

FIG. 2 is an explanatory view of a conventional heat welding device for this binding.

[Fig. 3] Detailed view of molds (11) (21) used for this.

FIG. 4 is an explanatory diagram of changes over time in this.

FIG. 5 is an explanatory diagram of a calendar binding device for carrying out the present invention.

FIG. 6 is an explanatory view of a main part of the binding device.

FIG. 7 is an enlarged view of part A of this.

FIG. 8 is an explanatory diagram of the change with time of this.

FIG. 9 is a flowchart of a control program adopted in the apparatus of this embodiment.

[Explanation of symbols]

 (11) (21) ・ ・ ・ Mold (3) ・ ・ ・ Coating layer (31) ・ ・ ・ Ceramic layer (32) ・ ・ ・ Fluorocarbon resin layer (9) ・ ・ ・ Laminate (90) ・ ・ ・Bound part

Claims (1)

[Claims] 1. A laminated body (9) in which a plurality of sheets are laminated, the binding portion (90) at an end portion of the laminated body (9) having the entire pressing surface.
(9) is placed between a pair of molds (11) and (21) covered with a coating layer (3) having excellent releasability, and the one mold (21) is inserted into the other mold. In the heat welding device for binding the bound portion (90) in a heat-welded state by heating and pressurizing the laminate (9) by bringing them to the (11) side so as to face each other, the coating layer (3), A ceramic layer (31) that is bonded to the pressing surface of the mold (11) (21) and has a surface with fine irregularities,
A heat welding device formed of a fluororesin layer (32) covered and bonded to this surface.