JPH0326085Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a process for obtaining paper pack packaging filled with contents such as youth from a thermoplastic strip sheet or a thermoplastic coated strip sheet. ,
Regarding a heat-sealing clamp for horizontally dividing and sealing a tube body made of a heat-sealable sheet filled with contents in a water pillow shape, the heat-sealing clamp is particularly capable of adjusting the clamping position according to a single pattern of the sheet. It is related to the structure of

[Conventional technology]

In an apparatus for packaging individual paper packs filled with contents from a belt-shaped sheet, the belt-shaped sheet is folded in half in the longitudinal direction, both ends are overlapped and vertically sealed to form a tube body, and then the belt-shaped sheet is folded into individual paper packs filled with contents. In order to fill the contents and seal each package separately, there is a step of horizontally sealing the tube body at regular intervals to form a water pillow shape.

The horizontal sealing section is a type in which the convex portions of the opposing molds of the heat sealing clamping body, which is made up of a pair of separable molds, are pressed against each other to crush the tube body, and the convex portions are heated by a heating means to fuse and seal. Therefore, the horizontal seal division must match the single pattern printed continuously on the sheet for each package cage, and if the horizontal seal is not applied between each single pattern, the pattern when formed on the package cage will be misaligned. This results in a bad product.

Therefore, as a device to make the tube body into a water pillow shape by continuously dividing the horizontal seal into a single pattern, the tube body is attached to a disc rotating at almost the same speed as the tube body, and the tube body is separated into horizontal seals in a continuous manner. There is a type in which heat-sealing clamps are arranged radially around the circumference, and the heat-sealing clamps consist of a pair of separable molds, which sandwich and heat the tube body for a certain period of time to thermally fuse it. It is something.

If there is an error in the interval between single patterns due to printing misalignment of the sheet, etc., adjust it by swinging each heat-sealing clamp in the advancing direction or moving the position on the circumference forward or backward according to the error. It is possible (patent application 1982)
−162356 (Japanese Unexamined Patent Publication No. 162312), No. 59−
208638) (Japanese Unexamined Patent Publication No. 61-93007).

Furthermore, as shown in FIG. 3, the sandwiching and opposing surfaces of the pair of molds constituting the heat-sealing sandwiching body have sealing protrusions 3 and 3' having heating means on each of the molds 1 and 2. The front and rear parts of 3 and 3' are made into low surface parts 5, 6, 5' and 6',
This bottom part presses and regulates the upper and lower surfaces of the water pillow-shaped bulge, and the two adjacent molds regulate the water pillow-shaped bulge.

[Problem that the invention attempts to solve]

As mentioned above, the sheet is laterally sealed by the heat-sealing clamps arranged at regular intervals according to a single pattern, and a certain amount of content is obtained in the water pillow-shaped bulge. When adjusting the position where the tube is held by the heat-sealing holding body,
The clamping interval between the heat-sealing clamping body and the front or rear heat-sealing clamping body will change, and the length of the water pillow-shaped swollen portion will also change by the amount of change, and the content will increase or decrease. The disadvantage arises that a non-uniform amount of product appears.

Moreover, the upper and lower surfaces of the water pillow-like bulge formed during sealing are formed by the lower surfaces 5, 6, 5',
Although it is pressed at 6', the left and right sides are open, and there is a risk that the tube-shaped vertical seal applied to these sides may peel off due to the influence of internal water pressure generated during crushing.

In view of these shortcomings, the present invention maintains the internal volume of the water pillow-shaped bulge portion at a constant level even if the clamping interval of the heat-sealing clamping body changes according to the single pattern of the seal, and provides a stable sealing action. The object of the present invention is to provide a sandwich body for heat fusion.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention forms a concave portion for regulating the water pillow-shaped bulge portion with a peripheral wall connected to the heat sealing convex portion of each type of a heat sealing sandwiching body consisting of a pair of separable molds. , the water pillow-shaped bulge is wrapped around the regulating recess that is joined when the molds are butt-sealed.

[Effect]

Each mold of the present invention is provided with a regulating recess formed by a peripheral wall connected to a heat sealing projection, so that when clamping, the sealing projections are joined not only to each other but also to the peripheral walls that are connected to each other. The recess forms a closed space.

Therefore, if the tube body interposed between the opposing surfaces of the pair of molds of the heat-sealing clamping member is held, the tube body is crushed by the sealing convex part, and at the same time as the tube body is heat-sealed, it is inserted into the space formed by the regulating concave part. The water pillow-like swollen portion is wrapped, and the shape of the water pillow-like swollen portion can be kept constant without being affected even if the holding position of the subsequent heat-sealing holding body changes.

In addition, in order to protect the sheet from internal water pressure generated in the water pillow-like bulge formed when the sealing convex part is crushed by the sealing convex part, the vertical seal part can be peeled off. It is also possible to prevent the effects of time on the sheet.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention. Similar to the conventional horizontal seal mechanism shown in FIG. A movable mold 2 is pivotally supported 7 on the fixed mold 1 of the clamping body 17, and is separated from the fixed mold 1 by rotation of the movable mold 2.

Separation from the fixed mold 1 is performed by a torsion guide 9 on which a trochanter 8 provided on the movable mold 2 rolls, and when the molds 1 and 2 are butted, a pressurizing trochanter 10 provided on the movable mold 2 is applied. It makes contact with the pressure arcuate guide 11 to strengthen the butt pressure against the movable mold 1.

Note that the clamping position adjusting means of the heat-sealing clamp 17 is omitted.

The opposing clamping surfaces of the fixed mold 1 and the movable mold 2 have the same shape, and include a sealing convex portion 3 having a heating means (not shown) and a peripheral wall 1 on substantially the same horizontal plane as the convex portion 3.
2 is extended, and one surface of the convex portion 3, the peripheral wall 12 and the bottom portion 1
3 forms a regulating recess 16.

When the molds 1 and 2 abut each other, this regulating recess 16 also abuts the upper end surfaces of the peripheral wall 12, allowing the tube body 14 to be enclosed in the exposed closed space.

[Effect of idea]

As described above, in the present invention, when the pair of molds of the heat-sealing clamping body that performs the horizontal sealing section crushes the tube body and heat-seals the sheet, it also wraps up the water pillow-shaped swollen part that is sectioned. In order to regulate the shape, the bulging part is kept in a constant shape even if the holding interval of the subsequent heat-sealing holding body changes slightly depending on the printing misalignment of a single pattern. It is always kept constant and has the effect of preventing the conventional non-uniformity.

In addition, since the internal water pressure of the divided water pillow-like bulges generated when the tube is crushed is received by the enclosing regulation recess, it also has the effect of regulating the expansion of the sheet and preventing the vertical seal part from peeling off.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a sectional view of the same, and FIG. 3 is a front view of the conventional example. Code, 17 is a heat-sealing clamp, 1 and 2 are molds, 3
12 is a peripheral wall, and 16 is a regulating recess.

Claims (1)

[Scope of utility model registration request] On the circumference of a rotating disk that is continuously driven to rotate,
A plurality of sets of heat-sealing clamping bodies each consisting of a pair of fixed molds and a movable mold are provided at required intervals, and each of the movable molds is pivotally supported on the fixed mold, and the tube body is placed on the fixed mold when separated from the fixed mold. Each mold is formed with a heat-sealing protrusion that seals the tube body when the movable mold is butted against the fixed mold, and a peripheral wall connected to the heat-sealing protrusion of each of the above-mentioned molds. and a regulating recess that wraps the tube body into a water pillow shape of a required size when each mold is butted,
Structure of a heat-sealing clamp for horizontally sealing tubes in paper pack packaging.