JPH0370614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a cylindrical synthetic resin film with a chuck, which is a raw material for synthetic resin bags with a chuck.

An apparatus for integrally extruding cylindrical synthetic resin films of different colors by an inflation method is known, for example, from Japanese Utility Model Publication No. 46-29598 or Japanese Patent Publication No. 52-10142. However, all of these methods are merely extrusion molding of cylindrical synthetic resin films of different colors or types.

As is well known, there are synthetic resin bags with chucks in which male and female chucks are integrally molded at the opening of the bag at the same time as the film is manufactured.

Therefore, the present invention has developed a manufacturing device that is capable of integrally extruding cylindrical synthetic resin films of different colors, and simultaneously molding the chucks of male and female claws of different colors or the same color as one of the films. It provides:

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a die body, which has a plurality of resin introduction ports 2a and 2b on its lower side. Reference numeral 3 designates a mandrel provided in the die main body 1, and on its outer periphery there is a resin channel partition part 7 for dividing the introduced resin corresponding to the plurality of resin introduction ports 2a, 2b, and in the central axis part. has an air blowing hole 4 for inflation, and this air blowing hole 4 communicates with an air supply path 4a connected to an external air source.

5 is a slit adjustment ring disposed on the upper outer periphery of the mandrel 3; 6 is a slit adjustment ring 5;
It is a presser foot.

The present invention provides a molding apparatus for a cylindrical synthetic resin film as described above, in which a disc 8 is provided with chuck molding grooves 12 for male claws and chuck molding grooves 13 for female claws on its outer periphery as shown in FIGS. 2 and 3. The mandrel 3
The slits 11a and 11b, which are annular synthetic resin extrusion ports, are formed by the outer peripheral surface of the disk 8 and the slit adjustment ring 5. It is.

The rotational positioning structure of the disc 8 is such that a concentric guide hole 9 is provided in the disc 8, and the disc 8 is tightened and fixed by a bolt 10 that passes through the guide hole 9 and is screwed into the top surface of the mandrel 3.

Since the present invention has the above-mentioned configuration, the resin of different colors introduced from the resin introduction ports 2a and 2b is separated by the resin path partition 7 and passes through the slits 11a and 2b.
It is extruded from 11b into a cylindrical shape and is expanded and expanded by air from the air blowing hole 4. The cylindrical film extruded from the synthetic resin extrusion ports 11a and 11b becomes films Fa and Fb with different colors on 1/2 circumference due to the resin path partition 7, and the portions that meet at the resin path partition 7 are A weld portion W forms a boundary between different colors.

Therefore, the present invention is directed to the above-mentioned unique films Fa, Fb.
Simultaneously with the extrusion molding of the cylindrical film, male claws Ga and female claws Gb (see FIG. 4) of the chuck are formed by chuck forming grooves 12 and 13 formed in the disc 8. Moreover, the male claw Ga and female claw Gb are molded in different colors just like the different colored films Fa and Fb,
It is also possible to mold both the male claw Ga and the female claw Gb in the same color as one film Fa or the other film Fb.

That is, as shown in FIG. 2, the disk 8 is rotated and positioned so that the chuck molding groove 12 of the male claw Ga and the chuck molding groove 13 of the female claw Gb are positioned on the left and right with the resin path partition 7 in the center. As a result, the male claw Ga is exposed to the film extruded from the slit 11a.
The female claw Gb becomes the same color as the film Fb extruded from the slit 11b, and male claws Ga and female claws Gb of different colors are formed. When a bag is formed using the molded cylindrical film, one of the films facing each other is
Fa and male claw Ga and the other film Fb and female claw
Gb is different in color from each other, and the weld portion W at the boundary between the different colors of films Fa and Fb is located at the bottom of the bag. Furthermore, as shown in FIG. 3, by rotating and positioning the disk 8 so that the chuck molding grooves 12 and 13 are located within the range of either one of the slits 11a and 11b from the position of the resin partition 7, the nail
Both Ga and the female claw Gb are molded in the same color as the film Fa extruded from the slit 11a or the film Fb extruded from the slit 11b. and,
When a bag body is formed from a molded cylindrical film, as shown in Fig. 4B, the films Fa, Fb
The weld portions W at the boundaries of different colors are located on opposite sides, forming bags with different colors on the upper and lower sides, and the male claw Ga and female claw Gb have the same color as the films Fa, which are opposite to each other and have the same color. Further, the position of the weld part W, which is the boundary between the upper and lower parts of the bag body, is such that the chuck molding grooves 12 and 13 are located within the range of one of the slits 11a and 11b from the position of the resin path partition part 7. It can be arbitrarily changed depending on the rotational positioning angle.
For example, as shown in FIG.
When the position of the weld part W is set at an angle of 90 degrees with respect to the resin partition part 7, the weld part W
is located approximately at the center of the top and bottom of the bag. Therefore, by increasing or decreasing the angle, the weld portion W
is located above or below the bag body, and a bag body with a large or small area of different color on the top and bottom can be obtained.

As described above, according to the device of the present invention, in a synthetic resin bag with a chuck, the bag body film on two opposing sides are different colors, and the chucks on the pair of male and female claws are also different colors. And, the top and bottom of the bag film on the two sides facing each other are unique,
In addition, it is possible to produce a cylindrical synthetic resin film in which the male and female claws are the same color as the upper film, and a disc having chuck forming grooves provided on the top surface of the mandrel is formed on the mandrel using the same die. There is an advantage that the resin extrusion amount can be obtained without adjusting the amount of resin extrusion through a simple structure and operation that enables rotational positioning at any angle with respect to the resin path partition section.

Furthermore, the synthetic resin bag with chuck formed from the cylindrical synthetic resin film manufactured by the apparatus of the present invention has a unique color in which the bag film itself is integral, and the opening thereof is integrally molded. The male and female cheeks are also unique, which further improves the beauty of the product.
The material for the bag with Feissner No. 22346 also allows for mass production.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the device of the present invention, Figs. 2 and 3 are plan views, and Figs. FIG. 1...Die body, 2a, 2b...Resin inlet, 3...
Mandrel, 5...Slit adjustment ring, 7...Resin path partition, 8...Disc, 9...Guide hole, 10...Bolt, 11a, 11b...Slit, 12, 13...Chuck forming groove.

Claims (1)

[Claims] 1 A die body is provided with a plurality of resin inlet ports, a mandrel provided in the die body has a resin path partition portion that separates the resin introduced from the plurality of resin inlet ports, and a slit is adjusted on the outer periphery of the mandrel. In a molding device for a cylindrical synthetic resin film in which a ring is arranged, a disc having chuck molding grooves with male and female claws formed on its outer periphery and guide holes concentric with the outer periphery formed on its surface is placed on top of the mandrel. The slit is rotatably positioned concentrically with the center of the mandrel by a bolt that passes through the guide hole on the surface and is screwed into the mandrel, and an annular slit is formed by the outer peripheral surface of the disk and the slit adjustment ring. An apparatus for manufacturing a cylindrical synthetic resin film with a chuck, which is characterized by: