JPH0699445A - Method and apparatus for manufacturing bag-shaped item - Google Patents

Abstract

PURPOSE:To achieve the alleviation of working labor by automation in the edge-part removing work of a bag-shaped item formed on the surface of a die by a submerging method, the improvement of working efficiency, the countermeasures for the automation request of the manufacturing method of this kind of the bag-shaped item the improvement of the releasing property when the edge part is removed and the reduction of the attching amount of raw material. CONSTITUTION:A bag-shaped molding die 1, wherein a pointed protruding stripe part of tip is provided around the opening root part of the main body of the die, is submerged into polyvinyl chloride resin solution. Only the tip of the protruding stripe part is locally made to be the thin film state. Thus, the entire die is formed as a film. Then, the die is moved to an edge-part removing mechanism 11 constituted of a die rotating, and moving mechanism 12 and an edge-part removing belt 21. The above described molding die 1 is rotated with the axial core as the center. The edge part B, which is formed between the protruding stripe part and the base edge of is brought into contact with a surface 22 of the removing belt 21, whose rotating speed is adjusted to the rotation lower than the rotating speed of the die 1, and the molding die 1 is turned. The edge part B is peeled away by the friction generated by the speed difference, and the side-edge part is processed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a bag-shaped article, in which a molding die is immersed in a solution of a synthetic resin such as vinyl chloride or rubber to form a desired bag-shaped article, and more particularly, Relates to an edge treatment step in the steps of the method.

[0002]

2. Description of the Related Art In a dipping method of dipping a molding die in a solution of synthetic resin or rubber to form a desired bag-like object such as gloves, finger cots, urinary sacs or balloons for endoscopes, Ears (unnecessary part) remaining at the mouth (entrance) of the object
The step of removing the edges and treating the edges is indispensable, and in the past, after the bag-shaped material was peeled from the mold, the operator successively cuts it with a cutter or the like.

[0003]

However, in the above-described conventional manufacturing method, the operator is required to peel off the ears by hand, and it is troublesome. There was also the background that there was a demand for automation of the entire manufacturing process due to poor efficiency, and improvements in the manufacturing method of this type of bag-shaped product were desired. Further, there is room for improvement in releasability at the time of removing the ears, and since the ears are unnecessary parts, it is preferable from the viewpoint of cost that the raw material adhesion amount is as small as possible.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to remove ears from a bag-shaped object formed on a mold surface by a dipping method. By automating it, it contributes to the reduction of work effort and the improvement of work efficiency, and it also fully responds to the demand for automation of the manufacturing method of this type of bag-like material. This is to reduce the adhesion amount.

[0005]

In order to achieve the above object, the technical means of the present invention is to provide a bag-shaped article molding die in which a tip-pointed ridge is provided in the periphery of the mouth of the die body. , A synthetic resin, rubber, or the like is dipped in the solution to locally form a thin film only on the tips of the ridges to form a film on the entire mold, and then an ear composed of a mold rotation transfer mechanism and an ear removal belt. To the part removing mechanism, and the mold rotating and transporting mechanism causes the mold to rotate in a desired direction around the axis, and the surface of the removing belt is adjusted to a speed different from the rotation speed of the mold. , The forming die is rolled while abutting the ear portion formed between the protruding portion and the base end edge of the die, and the edge portion is peeled off by friction caused by the speed difference. Partial processing.

[0006] Further, a bag-shaped material molding die having pointed ridges around the mouth of the die body is dipped in a solution of synthetic resin or rubber so that only the tips of the ridges are localized. The entire die is formed into a thin film and then moved to an ear removing mechanism composed of a die rotating transfer mechanism and an ear removing belt. The ear formed on the surface of the removal belt, which is rotated in a desired direction around the mold and is rotationally adjusted in a direction different from the rotation direction of the mold, between the ridge and the base edge of the mold. It is also possible to roll the forming die while bringing the part portions into contact with each other, and peel off the ear portion by friction generated by the rotation in the different direction to treat the edge portion.

Further, it is also possible to use a molding die having a fluorine-based coating film on the surface of the ear portion film-forming surface between the protruding portion and the base end edge.

Further, the apparatus used in the manufacturing method according to claim 1 is rotatably provided on a conveyor of an immersion molding line, and is a bag-shaped material molding die which is immersed in a desired solution to form a film on the surface. With a die rotation transfer mechanism for forcibly rotating it around a shaft center in a predetermined direction, and an ear removing belt for removing the ear formed on the surface of the die by abutting it on the upper surface. The removal belt is configured to rotate at a speed different from the rotation speed of the mold.

Further, the apparatus used in the manufacturing method according to claim 2 is rotatably provided on a conveyor of an immersion molding line, and the bag-shaped material molding die is immersed in a desired solution to form a film on the surface. With a die rotation transfer mechanism for forcibly rotating it around a shaft center in a predetermined direction, and an ear removing belt for removing the ear formed on the surface of the die by abutting it on the upper surface. The removal belt is configured to rotate in a direction different from the rotation direction of the mold.

[0010]

EXAMPLES The following will describe one embodiment of the present invention in the case of manufacturing a bag-shaped product (finger sack, etc.) having a U-shaped side surface. The bag-shaped product molding die 1 used in the manufacturing method of the present invention is as follows. For example, a tip-shaped projecting ridge portion 5 projecting like a blade is provided in the peripheral region of the mouth 3 (entrance portion) of the mold body 2 formed in the shape of a dome-shaped tip, and the ridge portion tip 6 (pointing portion) ) To the dome-shaped tip 7 to form the bag-shaped article body A on the bag-shaped article body film-forming surface 8, and the ridge portion tip 6 to the base edge 4 to form the ear portion B on which the ear-piece film-forming surface is formed. 9, the mold 1 is attached to a support shaft 15 provided on an endless chain plate 13 provided in a manufacturing line, and the mold 1 is adjusted to a predetermined mold temperature and then suspended. Immerse the entire mold once or several times in the desired solution of vinyl chloride, and then cover the entire surface of mold 1 with vinyl chloride paste. Pulling by attaching door,
A paste is locally adhered to the ridge end 6 by a surface tension in a thin film form, and is semi-cured to form a film.
After that, it is moved to the ear removing mechanism 11.

The support shaft 15 provided on the chain plate 13 is constructed so as to be rotatable around the shaft center at an intermediate portion, and can be laid sideways on the holding portion 14 fixed on the chain plate 13 (y Direction), the bag-shaped article molding die 1 is connected to the tip and supported, and moves along the manufacturing line (z direction). That is, the bag-shaped article molding die 1 which is held in a suspended state in the dipping step and formed into a film is moved while being supported by the main guide walls 24 provided on both sides of the chain plate 13 in the line direction in a standing state. In the next ear removing step, the die 1 is supported sideways by the sub guide wall 25 arranged in parallel with the chain plate 13 with the support shaft contact surface 26 facing upward and moved.

Then, the bag-shaped object molding die 1 having moved to the ear portion removing mechanism 11 in the surface film-forming state is laid down by the sub-guide wall 25 around the shaft attachment portion 16 of the support shaft 15 and the ear The ear part B is peeled off by the ear part removal belt 21 while being rolled counterclockwise by the mold rotation transfer mechanism 12 of the part removal mechanism 11, and the process moves to the next surface treatment step and bag-like object reversal separation step. Become. Further, the surface treatment step may be performed before the ear portion removing step, and it may be omitted and may be appropriately changed. still,
In the present embodiment, the bag-shaped article molding die 1 is described as rotating in the counterclockwise direction (x direction), but may be rotated in the clockwise direction without any limitation.

As described above, the ear removing mechanism 11 comprises the mold rotating and transferring mechanism 12 and the ear removing belt 21, and the mold rotating and transferring mechanism 12 is constructed so as to be rotatable about the shaft center in the middle thereof. The support shaft 15, the pinion 18 integrally provided around the rotation part 17 of the support shaft 15, and the rack 19 disposed below the pinion 18 in parallel with the chain plate 13. The pinion 18 meshes with the rack 19 as the chain plate 13 moves, and the pinion 18 moves upward from the rotating portion 17 a 15a.
Rotates counterclockwise to rotatably transfer the bag-shaped material forming die 1.

Further, the support shaft 15 has a ridge 20 provided around the pinion 18 at a position higher than the circumferential position of the pinion 18.
0 is brought into sliding contact with the support shaft contact surface 26 of the sub guide wall 25.

On the other hand, the selvage removal belt 21 has a rotational speed different from the rotational speed of the bag-shaped material forming die 1, for example, in the same direction (x 'direction) as the glove forming die 1, and the rotational speed with respect to the die rotational speed. An endless belt having a desired length whose speed is adjusted so as to be fast, the belt surface (peeling surface) 22 of the belt being opposed to the ear portion film-forming surface 9 of the mold 1, and the rack 19 described above.
It is arranged in parallel with.

The rotational speed of the bag forming mold 1 and the rotational speed of the ear portion removing belt 21 are, for example, 6 times the difference in peripheral speed.
m / min.

Further, as shown in the drawing, an ear separating roll (pretreatment step) 28 is provided in front of the ear removing belt 21, and the ear B is previously rotated by rotating the roll 28 in front of the ear removing belt 21. It may be separated from the ridge end 6 to improve the stripping efficiency of the ear removing belt 21, and in the present embodiment, the pressing portion 29 is used to bring the bag removing mold 1 into close contact with the ear removing belt 21. Is equipped with.

Therefore, the ear portion B portion formed between the tip 6 and the base edge of the ridge portion of the bag-shaped molding die 1 is brought into contact with the surface 22 of the ear removing belt 21. When the mold 1 is rolled, the ears B are caught by the friction generated by the speed difference between the two, and the ears B peeled off along the tip 6 of the ridge formed in a thin film form. Of the bag-shaped article molding die 1 including the bag-shaped article main body A whose edges B have been removed and the edges of which have been removed, and then the sub-guide wall 25 is erected again by the main guide wall (not shown). It is supported by the state and moves to the next surface treatment step.

Further, in this embodiment, a step 27 is provided on the sub guide wall 25 in front of the starting end 23 of the ear removing belt 21, and the protrusion 20 provided around the support shaft 15 is ridden on the step 27. The bag-shaped article molding die 1 that has moved to the ear portion removal belt 21 is set by temporarily holding the bag-shaped article molding die 1 higher than the ear portion removal belt 21 and then rolling it on the belt 21. The belt start end 23 is not touched.

Further, even if the belt speed is set to be slower than the mold rotation speed contrary to the above-mentioned embodiment, the ear stripping effect can be similarly obtained and can be appropriately changed.

Therefore, after passing through the above-mentioned ear portion removing step, and through the conventionally well-known surface treatment step and reverse peeling step, a side-face U-shaped bag-like object (finger sack or the like) having a cleanly processed edge is molded. To be done. The surface treatment process and the reverse peeling process are well known in the related art, and thus the description thereof is omitted.

Then, as in the ear part removing mechanism 11 according to the manufacturing method of the second aspect, the ear part removing belt 21 is provided in a direction different from the rotating direction of the bag-shaped article molding die 1 (the mold rotates counterclockwise as shown in the drawing). (If the belt is clockwise, the belt is rotated clockwise), and the molding die 1 is moved while the ear portion B formed between the protruding portion 5 and the base end edge 4 of the die 1 is brought into contact. If you roll it,
The ear portion B formed on the bag-shaped material molding die 1 is peeled off by friction generated by the rotation of the two in different directions, and the edge portion can be treated in the same manner as described above. Incidentally, the rotation speed is not limited in any way, and both may be equal to or higher than any of them.

Further, in the present embodiment, the bag-shaped object molding die 1 is laid sideways to remove the ears, but the ears may be removed while the mold 1 is kept standing. Although not limited to this, according to the present embodiment, the peeled-off ear portion B falls outside the normal line, which is preferable for cleaning the peeled-off ear portion (dust). Further, in the present embodiment, the stripping waste collection belt 30 is installed below the ear portion removal belt 21 in the line direction,
It is supposed that the stripped off ear B can be collected and effectively contributed to resource reuse.

Further, in the bag-shaped molding die 1, as described in claim 3, the ear portion film-forming surface 9 from the tip of the protruding portion 5 to the base edge 4 is formed.
If the fluorine-based film 10 such as fluorine or silicon is provided on the surface of the above, the wettability (sliding property) of the above-mentioned fluorine is obtained.
As a result, it is possible to further improve the releasability at the time of automatically peeling off the ears B adhered to the surface of the ears film forming surface 9 by the ears removal belt 21, and the ears B which are originally unnecessary parts. It is possible to reduce the amount of the vinyl chloride paste that forms the resin.

A specific example of the above-mentioned fluorine-based film is shown below. Assembled material Ni-F system surface treatment (thickness 30 μm) Adhesion amount 2.5 g to 1.8 g Friction resistance (dynamic) 0.06 μm (500 g vertical load)

In the above embodiment, a bag-shaped product made of vinyl chloride resin is manufactured. However, the bag is not limited to the vinyl chloride resin, and other synthetic resins such as urethane and silicone, or rubber may be used. Of course, it ’s okay,
Further, the bag-like object is not limited to the side-U-shaped bag-like object (finger sack) shown in the present embodiment, but may be, for example, a urine sucking sack having a desired shape, an endoscope balloon, or a glove having a desired shape. Further, the shape of the edge portion, the thickness, and the like can be changed as appropriate and are not limited in any way.

[0027]

Industrial Applicability According to the present invention, a bag-shaped material molding die having a pointed tip-shaped projection on the periphery of the mouth of the die body is dipped in a solution of synthetic resin, rubber or the like to form the projection. Only the tip is locally made into a thin film, and the entire die is formed into a film. Then, the die is moved to an ear removing mechanism composed of a die rotating transfer mechanism and an ear removing belt, and then molded by the die rotating transfer mechanism. A mold is rotated around a shaft center in a desired direction, and a film is formed between the protrusion and the base edge of the mold on the surface of the removal belt whose speed is adjusted to a speed different from the rotation speed of the mold. It is a bag-shaped product manufacturing method in which the ears are abutted against each other and the mold is rolled, and the ears are stripped off by the friction caused by the speed difference, and the edge is treated, so that the conventional operator is very careful. ,
Moreover, the ear removal work of the bag-shaped product that was performed manually can be performed automatically and reliably in the bag-shaped product manufacturing line by dip molding, which can reduce the work labor and improve the work efficiency. It is possible to sufficiently meet the demand for automation in the method for manufacturing various types of bag-shaped products.

Further, the removing belt in the ear removing mechanism is rotationally adjusted in a direction different from the rotating direction of the mold to remove the ear portion formed between the protruding portion and the base edge of the mold. Rolling the mold while contacting it, and the bag-like object manufacturing method in which the ears are stripped off by the friction generated by the rotation in the different directions and the edge is processed can also reduce the work labor and improve the work efficiency in the same manner as above. As a result, it is possible to sufficiently meet the demand for automation in this type of bag-shaped product manufacturing method.

Further, in each of the above-mentioned manufacturing methods, if a molding die having a fluorine-based coating on the surface of the ear portion film-forming surface between the ridge and the base edge is used, the fluorine-containing film is wet. The slippery property improves the releasability when the ears that adhere to the mold surface are automatically peeled off by the ears removal belt, and reduces the amount of raw materials that form the ears that are originally unnecessary parts. The cost will be lower.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a bag-shaped material manufacturing method and manufacturing apparatus according to the present invention.

FIG. 2 is a side view showing a main portion partially enlarged.

[Explanation of symbols]

 1: Bag-shaped object mold 3: Mouth part 4: Base edge 5: Ridge part 6: Tip 8: Bag-shaped object body film formation surface 9: Ear film formation surface 10: Fluorine-based film 11: Ear removal Mechanism 12: Mold rotation transfer mechanism 18: Pinion 19: Rack 21: Ear removal belt 21: Belt surface

Claims (5)

[Claims] 1. A bag-shaped article molding die, in which a tip-shaped protrusion is provided in the peripheral region of the mouth of a mold body, is dipped in a solution of synthetic resin or rubber, and only the tip of the protrusion is locally applied. The entire die is formed into a thin film and then moved to an ear removing mechanism composed of a die rotating transfer mechanism and an ear removing belt. The ears formed on the surface of the removal belt, which is rotated in a desired direction around the mold and is adjusted to a speed different from the rotation speed of the mold, between the ridge and the base edge of the mold. A method for producing a bag-shaped product, which comprises rolling a molding die while bringing parts into contact with each other, and peeling off the ears by friction generated due to a difference in speed thereof to process an edge portion. 2. A bag-shaped article molding die having a pointed tip-shaped ridge in the periphery of the mouth of the die body is dipped in a solution of synthetic resin or rubber, and only the tip of the ridge is locally applied. The entire die is formed into a thin film and then moved to an ear removing mechanism composed of a die rotating transfer mechanism and an ear removing belt. The ear formed on the surface of the removal belt, which is rotated in a desired direction around the mold and is rotationally adjusted in a direction different from the rotation direction of the mold, between the ridge and the base edge of the mold. A method for producing a bag-shaped product, characterized in that the forming die is rolled while abutting the part portions, and the ears are peeled off by the friction generated by the rotation in different directions to treat the edge portion. 3. The bag shape according to claim 1 or 2, wherein a molding die having a fluorine-based coating on the surface of the ear portion film-forming surface between the protruding portion and the base end edge is used. Method of manufacturing things. 4. A bag-shaped molding die, which is rotatably provided on a conveyor of an immersion molding line and is immersed in a desired solution to form a film on its surface, is forcibly forced in a predetermined direction around an axis. It is composed of a mold rotation transfer mechanism for transferring while rotating, and an ear removing belt for removing the ear formed on the surface of the mold by bringing it into contact with the upper surface, and the removing belt is a rotating speed of the molding die. An apparatus for manufacturing a bag-like object, which is characterized by rotating at different speeds. 5. A bag-shaped molding die, which is rotatably provided on a conveyor of an immersion molding line and has a surface formed by being dipped in a desired solution, is forcibly forced in a predetermined direction around an axis. It is composed of a mold rotation transfer mechanism for rotating and transferring, and an ear removing belt for removing the ear formed on the surface of the mold by bringing it into contact with the upper surface. An apparatus for manufacturing a bag-shaped material, which is characterized by rotating in different directions.