JPH0465232A - Preparation of heat insulating container - Google Patents

Abstract

PURPOSE:To provide a heat insulating container excellent in heat insulating properties, capable of being incinerated after use and having neat appearance by forming a cup container made of paper provided with unevenness having a corrugated cross section and integrally attaching a body member made of paper having a flat peripheral surface. CONSTITUTION:A paper blank 1 is rounded to be bonded in a cup shape (a) and a bottom plate 2 is inserted in the lower part of the cup-shape body (b) to be seamed to form a taper cup container 3 wherein the diameter of the bottom part thereof is smaller than that of the opening part thereof. Next, a mandrel 4 is inserted in the cup container 3 or the cup container 3 is fitted in the mandrel 4 to evacuate the cup container (e). When the cup container 3 is evacuated from a shaft hole 4c, the cup container 3 is sucked to the surfaces of the recessed and protruding parts 4a of the mandrel 4 by a large number of suction holes 4b and corrugated parts 3b having a zigzag cross section are formed to the cup container in matching relation to rules 1a. Thereafter, a body member 5 having a flat surface is integrally attached to the outer surface of the cup container 3 (g) to form a heat insulating container.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a heat-insulating container suitable for cup noodles, instant soup, and the like.

[Prior art] Conventionally, this type of insulated container has been made of polystyrene foam and formed into a cup shape, and some have been made by wrapping a body member with corrugated irregularities around the outside of the paper container. A double-walled insulated container is also used (Special Public Interest Publication in 1984).
-3532 publication).

[Problems to be Solved by the Invention] Although the container made of expanded polystyrene has excellent heat insulation properties, it cannot be incinerated after use, resulting in pollution problems in garbage disposal. In addition, the double-structured heat-insulating container with the body member wrapped around it has excellent heat insulation properties and can be incinerated after use, so it does not pose a problem of pollution when disposing of garbage. Because of this, it is difficult to display by printing, etc., and the appearance is also lumpy and unsightly.

The present invention was made to solve these conventional problems, and aims to provide a method for manufacturing a smart heat-insulating container that has excellent heat-insulating properties, can be incinerated after use, and has no irregularities on its surface. be.

[Means for Solving the Problems] As a means for technically solving the above-mentioned problems, the present invention forms a paper cup container in which the peripheral wall is pre-formed with ruled lines that create unevenness in the cross-section. A mandrel having wavy irregularities formed on the outer circumferential surface corresponding to the ruled lines and provided with suction holes is fitted into the cup-making container, and vacuum suction is applied to bring the paper cup container into close contact with the mandrel, thereby forming a peripheral wall. The gist of this method is to form unevenness with a corrugated cross section on the paper cup container, and further to attach and integrate a paper body member with a flat peripheral wall to the outside of the paper cup container.

[Operation] A mandrel with suction holes in the desired uneven shape on the outer circumferential surface corresponding to the ruled lines is fitted into a paper cup container whose circumferential wall has been pre-formed with ruled lines that create an uneven cross-sectional shape, and a vacuum is applied. Since the unevenness is formed on the paper cup container by suction, the uneven shape can be made into any shape by changing the unevenness on the surface of the mandrel, and the optimum unevenness shape corresponding to the shape of the paper cup container can be obtained. It can be done.

In addition, the mandrel not only provides an uneven shape to the paper cup container, but also allows the paper body member to be attached to the outside of the paper cup container and is integrated with the paper body member. The manufacturing process can be shortened.

In particular, even so-called tapered paper cup containers whose bottom diameter is smaller than the opening can be stably manufactured without shifting the paper cup from the mandrel because it is held by vacuum suction.

When forming an insulating wave-like unevenness on a tapered container with a diameter smaller at the bottom than the opening, use a vertical ruled line that narrows from the top to the bottom, and connect the top ends of these vertical ruled lines with an inverted V-shaped ruled line. The shape is preferred. When a container with ruled lines in such a shape is vacuum-suctioned with a mandrel having corresponding irregularities on the surface, a shape is created in which the upper irregularities are large and the lower irregularities are small. As a result, the heat insulating properties of the body can be maintained, and the unevenness on the lower side is reduced, so that the lower end has good adhesion with the paper body member, making it possible to form a double container.

[Example code] Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

Fig. 1 shows the method of the present invention in the order of steps. First, a paper blank 1 is attached to the body (()L, and a bottom plate 2 is inserted at the bottom ()).
Ill) and by tightening it (c),
Tapered cup container 3 with a diameter smaller at the bottom than at the opening
A top curl 3 is formed at the upper end of this cup container 3.
Form a (d). As shown in FIG. 2, the blank 1 is provided with ruled lines 1a in advance so that the peripheral wall of the cup container 3 will have a corrugated cross-section in a later step.

Next, insert the mandrel 4 into the inside of the cup container 3, or fit the cup container 3 onto the mandrel 4 and apply vacuum suction (
n) Do. As shown in FIG. 3, the mandrel 4 has wavy irregularities 4 on its outer peripheral surface corresponding to the ruled lines 1a of the blank 1.
a is formed, and a large number of suction holes 4b are opened, and these suction holes 4b are connected to the shaft hole 4C of the mandrel 4.
are connected to each other. Therefore, when vacuum suction is applied from the shaft hole 4c of the mandrel 4, the cup container 3 is attracted to the uneven surface 4a of the mandrel 4 by the numerous suction holes 4b, and a waveform 3b having a zigzag cross section in alignment with the ruled line 1a is formed. You can.

Thereafter, a body member 5 having a flat surface is attached to the outside of the cup container 3 and fixed thereto, thereby forming a heat insulating container 6. In this case, the method of attaching the body member is to attach it to the back as shown in Figure 5.
5 or with a sack attached as shown in Figure 6.
2, or as shown in FIG. 7, there are methods such as adhering a label 53. Further, the body member 5 is not limited to having a circular cross section, but may have a polygonal cross section 54 as shown in FIG. Alternatively, it may be formed and then applied. In this way, when attaching the body member, the upper end of the cup container 3 is left on a flat surface, so it has excellent adhesion to the body member 5, and the upper edge of the circular body member 5 forms the top curl 3a. Since it is in close contact with the lower edge of the curl and is hidden by the top curl 3a, it has a good appearance that makes it stand out.

The heat insulating container 6 formed in this way exhibits sufficient heat insulation effect because an air layer 6a is formed between the force/knob container 3 and the body member 5, and since the body member 5 has a flat surface, printing is possible. etc. It is easy to display, and the appearance looks smart and has a good appearance. In the case of a knob container, when forming adiabatic wave-shaped irregularities on a tapered container with a diameter smaller at the bottom than at the opening, it is necessary to use vertical ruled lines that become narrower from the top to the bottom, as shown in Figure 2. It is preferable that the upper ends of the vertical ruled lines are connected by an inverted V-shaped ruled line. When a container with ruled lines in such a shape is vacuum-suctioned with a mandrel having corresponding irregularities on the surface, a shape with large irregularities on the upper side and small irregularities on the lower part is created. As a result, the heat insulating properties of the body can be maintained, and the unevenness on the lower side is reduced, so that the lower end has good adhesion with the paper body member, making it possible to form a double container. Further, since both the cup container 3 and the body member 5 are made of paper, they can be incinerated after use, which is extremely convenient for garbage disposal.

[Effects of the Invention] As explained above, according to the present invention, after forming a paper cup container having an uneven cross-section, a paper body member having a flat peripheral surface is attached and integrated. Because of this, an air layer is formed between the paper cup container and the body member, providing excellent insulation.Since both the cup container and the body member are made of paper, they can be incinerated after use, and the surface of the body member is flat. Because of this, it is possible to manufacture a heat insulating container with excellent effects such as easy display and a neat and smart appearance.

[Brief explanation of drawings]

Figures 1 (A) to (G) are explanatory diagrams showing the method of the present invention in the order of steps, Figure 2 is a plan view of a blank for a cup container, Figure 3 is a perspective view of the main parts of the mandrel, and Figure 4 is a heat insulation diagram. The cross-sectional view of the container and FIGS. 5 to 9 are all explanatory views showing how to attach the body member. 1... Blank 1a... Ruled line 2... Bottom plate 3... Force, container 3a... Top curl 3b... Waveform 4... Mandrel 4a...
・Irregularities 4b...Suction hole 4c...Shaft hole 5...
・Body member 6...Insulating container 6a...Air layer @ Figure 1 (A) (C) (D) (E) Kube) (G) Patent applicant Toppan Printing Co., Ltd.

Claims (2)

[Claims] (1) A paper cup container is formed with ruled lines that create uneven cross-sectional undulations on the peripheral wall, and wavy unevenness is formed on the outer peripheral surface of the paper cup container in correspondence with the ruled lines, and suction holes are formed inside the paper cup container. By fitting the provided mandrel and applying vacuum suction to bring the paper cup container into close contact with the mandrel, unevenness with a corrugated cross section is formed on the peripheral wall, and a paper cup container with a flat peripheral wall is formed on the outside of the paper cup container. A method of manufacturing a heat insulating container, characterized by attaching and integrating a body member. (2) The heat-insulating container according to claim (1), wherein the ruled line is composed of a vertical ruled line that becomes narrower from the top to the bottom, and an inverted V-shaped ruled line connecting the upper ends of the vertical ruled line. manufacturing method.