JPS5811645A - Vessel with bottom made of synthetic resin and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container with a bottom made of synthetic resin, such as a simple dish-like container, and a method for manufacturing the same.

Conventionally, various kinds of wires have been attached to this type of simple tableware-like synthetic resin bottomed container, and as shown in FIGS. It has a protruding edge part 1.

The conventional container 1a shown in FIG. There are 4 with the same thin wall. First, the conventional container 1b shown in FIG.

These containers 1a and 1b did not provide a pleasant feeling to the user because the edges of the containers did not provide a comfortable mouthfeel when the user put the container's edge to the mouth and drank the contents.

Furthermore, when these containers are covered with film sheet-like lids on their openings 3, their edges are supported by a jig K1, but the weight of the containers filled with contents is There was a problem in that the hem part consisting of seven thin-walled lunges of the kernel seed could not withstand the support, that is, there was a problem in holding the jig.

In this regard, in the case of the container 1c shown in FIG. Since it is formed by folding part of the 7 runs downwards, the problems mentioned above have been somewhat improved. however,
Both of these containers in Figure 1 (C) and (d) are
Figure (a) The container shown in K was formed by curling or folding a portion of the 7 runs, so the processing work was relatively laborious, and there was a problem in the productivity of this type of container. .

Therefore, an object of the present invention is to provide a container with a bottom made of synthetic resin, in which the edge portion at the outer periphery of the opening of the container provides the user with a mouthfeel and a holdability when sealing a lid to the opening. It is an object of the present invention to provide a container with a bottom made of synthetic resin which has a thick wall for good quality and which is extremely simple in processing and easy to manufacture, and a method for manufacturing the same.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the synthetic resin bottomed container of the present invention and its manufacturing method will be described in more detail with reference to preferred embodiments shown in the accompanying drawings.

According to one embodiment of the method of manufacturing a synthetic resin bottomed container of the present invention, as shown in FIG.

The parison is pull molded to integrally form a main body 11 and a chevron-shaped head 12 that will become a container 10. For convenience, the body 11 and the chevron-shaped head 12 formed integrally are referred to as a bottomed cylindrical body 13. This bottomed cylinder 13 is now shown in FIG.

As is clear from FIG. 2, the bottomed cylinder 13 has >I
The chevron-shaped head 12 extends laterally from the main body 11, which serves as a container, at the upper end opening 14 of the main body 11, and has a round cross section. The main body 11 and the body are formed through the IV-shaped portion 15. Such a V-shaped portion 15 is a special chevron-shaped head 12 formed by blow molding of the container.
It is also molded using a mold.

Next, this bottomed cylinder 13 serves as a support 16a.

16bK, the cutter 18° is suspended by supporting the V-shaped portion 15 of the main body 11 on the axial extension line of the opening edge of the main body 11, in other words, on the slope part of the chevron-shaped head on the extension line of the wall portion 17 of the main body 11. is inserted, and its chevron-shaped head 12 is removed. Various types of cutter 18 can be used, and the chevron-shaped head can be cut off by inserting the cutter from an appropriate direction. However, in one embodiment of the present invention, the cutter 18 is inserted axially upward into the main body 11 and rotated about the central axis of the main body 11 to cut off the chevron-shaped head. As a result, the cut surface 19 becomes parallel to the axis of the cylinder 13, as shown in FIG. Although such a cutting method is preferable because it produces the effects described below, it is not limited to this method.

In this way, the ± of the V-shaped section 15 with a horizontal cross section remains on the outer periphery of the opening 14 of the main body 11.If you look at it from another perspective, the V-shaped section 15 is formed on the outer periphery of the opening of the main body 11. The seventh rung portion 20 is folded back approximately half way. 1. Next, heat seal the flange portion of the main body 11 bar t- to form the edge portion 21 (see Figures 5(a) and 5(b)).
and FIG. 6).

As shown in FIG. 4, the support jigs 22a and 22b are suspended by a portion of the seven runs that extend to the sides.

Then, the hot plate 23 of the heating device is lowered from above,
The upper surfaces 20a of the seven rungs 20 formed in a horizontal V-shape, that is, half-folded, are pressed together and heat-sealed to each other (Fig. 5(a)), as shown in Fig. 5(a). When the hot plate 23 is used, the seven rung portions 20 are crimped and heat-sealed over the entire width to form a thick plate-like edge portion 21 as shown in FIGS. 5(a) and 6. However, if a hot plate 23 as shown in FIG. Due to its elasticity, the folded portion is formed into a loop shape to form a rim portion 21.

When the container lO is formed as shown in FIG. 7(a), Φ) in this manner, when the end face 19 of the flange end edge 20b at the edge 21 has a horizontal V-shape in cross section, the container 1O is formed as shown in FIG. If the cut is made along a cutting line parallel to the axis, when the flange portion 20 is heat-sealed and crimped, it will face diagonally downward as shown in FIG. This means that the corner 20 of the edge 20bK on the heat seal side
c is located directly below the contact surface 20d with the hot plate 23, and therefore receives sufficient pressure P, and the edge 2Q
Good heat sealing is achieved in step b.

Heat seal the flange portion 20 as described above.

As shown in FIG. 8, in order to close the opening 14 of the container 10, a film sheet 24 to be sealed is placed on the upper surface of the edge portion 21 in advance, and a hot plate 23 is applied to pressurize and heat the film sheet 24. By doing so, the film sheet-like lid can be sealed simultaneously with the formation of the edge portion, and the workability can be improved. In addition, at this time, cover material 2
4 may be placed in the V-shaped portion 15 and sandwiched between the heat-sealing surfaces of the edge portion 21 to be press-bonded and heat-molded. Various sealing methods can be used instead of the heat sealing described above.

In this way, the synthetic resin bottomed container of the present invention (Fig. 7 (
According to a), Φ)), since the edge portion 21 of the container 10 is formed thick, the mouthfeel is good for the user,
In addition, even when a film sheet-like lid is placed on the opening of the container, the edge part 21 has a high support strength for the entire container, so it holds well against the jigs.
can be formed very easily, thereby increasing the productivity of this type of container.

[Brief explanation of the drawing]

FIG. 1 (al) to @) are cross-sectional views showing various conventional easy-to-eat tableware-like synthetic resin containers having a rim on the outer periphery of the opening;
Fig. 2 is a sectional view of a semi-finished product state of the synthetic resin container of the present invention, showing part of the process of forming the container, and Fig. 3 is a cross-sectional view of the semi-finished product state shown in Fig. 2. FIG. 4 is a partial cross-sectional view of the container in a state in which the container has been heat-sealed, and FIG. ) and (b) are partial sectional views of the urine hem portion in two embodiments showing the heat-sealed state of the hem portion, respectively, and FIG. 6 is a partial cross-sectional view showing the heat-sealed hem portion in an enlarged manner. Cross-sectional view, Figure 7-
) and φ) are cross-sectional views showing containers of two embodiments formed by method 1 of the present invention, and FIG. 8 shows a case in which a film sheet-like lid is also placed and sealed when heat-sealing the edge portion. It is a sectional view showing a state. 10...Synthetic resin container, 11...Main body, 12...
- Chevron head, 13--bottomed cylinder, 14--opening, 18--cutter, 19--cutting surface, 20--
flange part. 20 Maro...Top surface of flange part, 20b-...7 edge of flange part, 21... Edge part, 23... Hot plate. Figure 1 Figure 2 Figure 3 Q Figure 4 Figure 5 Figure 6 Figure 7 Figure 10 Figure 8

Claims (1)

Scope of Claims: (1) A container with a bottom made of synthetic resin having nine helical parts protruding in any direction on the outer circumferential edge of the 11110 part, wherein the helical parts are formed on the outer circumferential edge flange of the opening formed during molding of the container. A container with a bottom made of synthetic resin, characterized by a groove formed on the upper surface near the base of the flange portion with the flange portion folded back toward the upper surface side, at least the edge thereof is sealed. 2. In the container with a bottom made of synthetic resin according to claim 1, the edges of the flange portion on the nine-folded side that are sealed to the upper surface of the flange portion face diagonally downward. (3) A method for manufacturing a synthetic resin bottomed container having an edge portion projecting in any direction at the outer periphery of the opening. /4 Pro mold the lison and make a container and e! Forming a bottomed cylindrical body having a chevron-shaped head through a V-shaped section with a transverse cross section extending laterally from the main body.1. Next, forming the chevron-shaped head at a portion on an axial extension line of the opening edge of the main body. cutting with a cutter to form a half-folded 1-shaped flange portion on the outer peripheral edge of the opening of the main body, and then attaching at least an edge of the half-folded flange portion to the upper surface of the flange portion; A method for manufacturing a container with a bottom made of synthetic resin, which includes sealing to form a lip.