JPS5822889Y2 - Automatic sealing machine for heavy packaging bags - Google Patents

Description

[Detailed description of the invention] This invention is an automatic mouth-sealing machine that heats and presses decorative paper with a hot-melt adhesive layer to the injection port of a bag filled with stored items to completely cover the injection port. This is related to.

Conventionally, the top-bottom square-bottom attachment, which has been widely used, is used when injecting fluids such as powder or granules into the bag.
As an inner-valve double-bottom adhesive, fluid is stored inside the bag through the inner-valve inlet, but the fluid inside the bag leaks out of the bag through the inlet when the bag is transported or stored. It has defects such as:

The present invention solves the defects of the conventional products and uses an inner valve type double-bottom pasting, in other words, an inner valve is provided at the bottom and a decorative paper with a hot-melt adhesive layer is pasted on top of the inner valve. The part covering the outer edge of the inlet is left unattached and left loose. After packing the items into the double-bottom inner valve type bag, that part is heat-pressed and the inlet is completely covered with decorative paper. The purpose of the present invention is to provide an automatic mouth sealing machine that completely prevents leakage of stored items.

That is, the present invention uses a clamping device to adjust the shape of the injection port of the packed bag, and then uses a thermocompression bonding device and a cooling device to completely cover and seal the injection port with decorative paper having a hot melt adhesive layer. This is an automatic mouth sealing machine with special features.

An embodiment of the present invention will be specifically described below based on the drawings, but the present invention is not limited to this embodiment.

Figure 1 shows the relative positions of the inlet and the decorative paper attached to the top, bottom and bottom of the automatic mouth sealing machine of the present invention.The part of the decorative paper A that covers the inlet remains unattached to the bag material. It is isolated.

FIG. 2 is a front view of the main parts of the mouth sealing machine according to the present invention,
The main parts include a clamping device, a thermocompression bonding device, and a cooling device that shape the bag when the free end of the decorative paper is heated and pressure bonded to the injection port of the packed bag.

In FIG. 2, the filled bags 1 move in the direction of the arrow on the roller conveyor 2 with the injection port facing forward.

At this time, a blower 3 is placed above the bag body 1 to blow away dust and deposits due to leakage of stored items near the injection port of the bag body 1.

The clamping device is used to stop the transfer of bags, clamp the filled bags from the top and both sides, and adjust and stabilize the shape of the bag's inlet. Two guide plates 8 and 9 that guide the bag parallel to the transport direction
A charging switch 14 is provided below the roller conveyor as a bag transfer stop device.

In front of the guide plate 9, there is a side press plate 10 which is operated by an air cylinder 11 and presses the other side wall of the bag.

Above the bag, there is an upper presser plate 4 located slightly behind the inlet of the bag and operated by an air cylinder 5, and a rectangular upper presser plate operated by an air cylinder 7 close to the inlet side. 6.

The thermocompression bonding device extends from the tip of the guide plate 8 to the bottom of the bag body in front of the holding plates 4 and 6, covers the decorative paper at the injection port, and has a height greater than the width of the bag bottom and a corner portion. It has a curved L-shaped heater plate 12, which is vertically moved up and down by an air cylinder 13.

The cooling device is for forced cooling of the decorative paper that has been heat-pressed. It consists of a separately adjusted cooling device 15 that blows out cold air and an air cylinder 16 that operates this cooling device. Once cooling is complete, this cooling device is transferred to a roller conveyor. It rotates backward in an arc to the side to facilitate the advancement of the bag, and returns to its home position once the bag has passed.

Furthermore, in front of the cooler is a swing plate 1 attached to a support shaft 17.
8 is placed at a position corresponding to the heat-pressed part of the decorative paper to press the heat-pressed part in a reinforcing manner (details of the interlocking mechanism are omitted). Then, the packed bag 1 is placed sideways on the roller conveyor 2 with the injection port facing forward, and the bag moves forward by moving the roller conveyor and is moved to the blower.
3 blows off dust, leakage of stored contents, deposits, etc. near the injection port of the bag body, and the bag body is heated by the heater plate 12.
The roller conveyor is turned off by sensing the photoelectric switch 14 just before the bottom of the bag comes into contact with the heater plate 12, and the bag hits the heater plate 12 by inertia and stops.

Next, the air cylinder 11 starts operating and the presser plate 10 presses closely against the side wall of the bag body, then the air cylinder 5 operates and the presser plate 4 lowers, and then the next air cylinder 7 is activated. As a result, the presser plate 6 descends and presses the bag.

In this series of devices, the presser plate 4 has guide plates 8 on both sides.
, 9, the air remaining in the bag is discharged from the bag through the gap in the inlet, and the upper holding plate 6 and the guide plates 8, 9 on both sides move the stored items inside the bag. Adjust it to the shape and make it easy for the decorative paper a to adhere to the injection port.

During this time, heating is continued and by heating for a certain period of time (approximately 4 seconds), the injection port is completely covered and bonded with the decorative paper.

Next, when the air cylinder 13 is activated and the heater plate 12 is raised, the waiting cooler 15 is moved forward by the activation of the air cylinder 16, brings its tip into close contact with the pressurized adhesive part, and blows cold air to perform forced cooling. to ensure complete adhesion.

When the adhesion is completed, the cooler 15 rotates and moves to the side of the roll conveyor so as not to obstruct the progress of the bags, and when the bags have progressed and passed, the heater plate 12 is lowered and waits for the next bag. The cooling device 15 also returns to its normal position.

This time is about 6 seconds. The bag 1 that has advanced is further transferred to the end of the conveyor while the heated and pressed portion is auxiliary pressed by the swing plate 18.

As described above, the automatic sealing machine of the present invention clamps the packed bag from the top and both sides using a clamping device having pressing plates, and discharges the remaining air inside the bag to the outside of the bag, and also removes the stored items from the bag. The bag body is kept in a stable state by adapting to the shape, and the free portion of the decorative paper is heated and pressed using a heat-pressing device, and the mouth-sealing portion is pressed against the flexible portion using a cooling device to forcibly cool it down.

Therefore, since the sealing part of the injection port of the bag is completely covered with the decorative paper, there is no possibility of leakage of the contents.

Also, the presser plates 4 and 6 that press down from the top of the bag are used to press different positions on the upper part of the bag, and the presser plate 4 is attached to the guide plates 8 on both sides.
, 9, the remaining air inside the bag is discharged to the outside of the bag, and the holding plate 6 has a synergistic effect with the guide plates 8, 9 on both sides to adjust the stored items to the shape of the bag body, thereby stabilizing the stored items in an orderly manner. It is something.

Furthermore, the cooling device allows the bag to be rolled after cooling without hindering the forward movement of the bag.
Since it rotates and moves laterally on the raconveyor and returns to its normal position after the bag has passed, the bag can be easily transferred without hindering the transfer of the bag in the slightest.

Therefore, the automatic sealing machine of the present invention completely covers and seals the sealing part, so it is an automatic sealing machine for heavy packaging bags that completely prevents the contents inside the bag from leaking during transportation and storage. The present invention provides an automatic mouth sealing machine capable of sealing an injection port with great practical value.

[Brief explanation of the drawing]

FIG. 1 shows the injection port of the top-bottom square-bottom sealing device that is sealed using the automatic sealing machine of the present invention. FIG. 2 is a front view showing the main parts of the automatic mouth sealing machine according to the present invention, and is an explanatory diagram of the state when the mouth is sealed, FIG. 3 is a plan view of FIG. 2, and FIG. It is a left side view. Each code is as follows: 1 is a bag without bagging, 2 is a roller conveyor, 3 is a blower, 14 is a holding plate, 5 is an air cylinder, 6 is a holding plate, 7 is an air cylinder, 8 is a guide plate, 9
is a guide plate, 10 is a presser plate, 11 is an air cylinder, 1
2 is a heater plate, 13 is an air cylinder, 14 is a photoelectric switch, 15 is a cooler, 16 is an air cylinder, 17 is a support shaft, and 18 is a swing plate.

Claims (4)

[Scope of utility model registration request] (1) The transport conveyor, which transports the packed bags by laying them sideways and placing the inlet in the front, can move vertically at two locations to reshape the top and sides of the bags in cooperation with the guide plate when the bags are stopped. A vertically movable clamping device having a horizontally movable upper presser plate and a horizontally movable side presser plate, and an L-shaped heater plate that heats and presses the free portion of the decorative paper covering the injection port of the shaped bag body. An automatic sealing machine for heavy packaging bags, which comprises an interlocking mechanism in which a thermocompression bonding device and a cooling device having a horizontally rotatable cooler for forcibly cooling the thermocompression bonding portion are sequentially arranged. (2) The automatic heavy packaging bag recited in claim 1, wherein the clamping device comprises a guide plate, a bag transfer stop device, a horizontally movable side holding mechanism, and a vertically movable upper holding mechanism. Mouth sealing machine. (3) The automatic sealing machine for heavy packaging bags according to claim 1, wherein the thermocompression bonding device comprises a vertically movable heating device having an L-shaped heater plate. (4) The automatic sealing machine for heavy packaging bags according to claim 1, wherein the cooling device comprises a horizontal rotating cooler.