JPH0339209Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of a presser mold device used for manufacturing an insulating box using a foamed insulating material.

[Technical background of the invention and its problems] Conventionally, in order to manufacture an insulating box using foam insulation material, such as a refrigerator box, a presser type device is inserted inside the inner box. The inner box receives the foaming pressure of the foamed heat insulating material injected between the inner box and the outer box, thereby preventing deformation of the inner box due to the foaming pressure.

By the way, inside the inner box, there are undercut parts 1, 1 on the side faces as shown in FIG.
In this device, the holding mold device is composed of a fixed mold 2 disposed at the back of the inner box and movable molds 3, 3 disposed on both side surfaces, and the movable mold 3 , 3 so as to be movable in the inward and outward directions, the movable molds 3, 3 are retracted inward as shown by the two-dot chain line in the figure during mold insertion and mold removal, and the undercut portions 1, 1 are movable. The entire presser mold is put in and taken out while avoiding the mold, and when the mold is set, the movable molds 3, 3 are brought out to the outside so that they can be tightly applied to both side surfaces of the inner box 4. However, in this case, the inner box 4 cannot be held down due to the space 5, 5 created by the movable molds 3, 3 which protrude outward from both end surfaces of the fixed mold 2 in the mold setting state, and the inner box 4 cannot be held down. There was a problem in that it could not withstand the foaming pressure of the foamed heat insulating material 6 and was deformed into a concave shape as shown by the two-dot chain line in the figure.

In addition, as a holding die device different from the above-mentioned one, as shown in FIG. Exists. However, in this case as well, when the molds are set, the movable molds 8, 8 move and separate from the fixed mold 7, creating a space 9, 9, and the inner box 4 is not held down by that amount, but is moved there. However, there was a problem in that concave deformation as shown by the two-dot chain line in the figure occurred.

[Purpose of the invention] The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a movable mold for the undercut portion of the inner box with almost no clearance. To provide a presser mold device which can be pressed without causing any concave deformation and which can be manufactured without causing concave deformation.

[Summary of the invention] The present invention includes an auxiliary mold that is thinner than the fixed mold and is provided so as to protrude laterally from the fixed mold and is placed at the back of the inner box together with the fixed mold. By providing the movable mold so that it can move toward and away from the side surface of the inner box, it is possible to reduce the degree of level difference that occurs after the movable mold has moved, that is, in the mold set state. That is.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to FIG. First, in Fig. 1, the same parts as in Figs. 2 and 3 are given the same reference numerals, and therefore, 1 in the figure is the undercut part, and 4 is its part. An inner box 6 having undercut portions 1 on both side surfaces thereof is a foamed heat insulating material injected and filled between the inner box 4 and an outer box (not shown). Reference numeral 10 is of a fixed type, and is arranged at the back of the inner box 4, particularly at the approximate center thereof. On the other hand, 1
Reference numerals 1 and 11 denote auxiliary molds, which are thinner than the fixed mold 10, e.g., 1.6 to 2.0 [mm] in thickness, and are connected to the fixed mold 10 so that they extend from the fixed mold 10 to both left and right sides in the figure. It is provided so as to protrude from the inner box 4, and is disposed at the inner part of the inner box 4 together with the fixed mold 10. Reference numerals 12 and 12 designate movable molds, which are movable along the auxiliary molds 11 and 11 in the left-right direction in the figure, toward and away from both side surfaces of the inner box 4 where the undercut portions 1 and 1 are present. ing.

Now, in the case of the structure as described above, the movable mold 1 is used when inserting and removing the mold from the inner box 4.
2 and 12 are pulled inward as shown by the two-dot chain line in the figure, the entire presser mold is taken in and out while avoiding the undercut portion 1, and when the mold is set, the movable pieces 12 and 12 are brought out to the outside. The inner box 4 is tightly applied to both side surfaces of the inner box 4, thereby preventing the inner box 4 from deforming under the foaming pressure of the foam insulation material 6. In this case, since the movable molds 12, 12 are provided so as to move not along the fixed mold 10, which has a large plate thickness, but along the auxiliary molds 11, 11, which have a smaller plate thickness, the internal The difference in level that occurs on the inner surface of the box 4 is also small between it and the auxiliary molds 11, 11.
Therefore, the spaces 13, 13 due to the step are also very small, and from this, the space 1 in the inner box 4 is small.
3 and 13 can also be eliminated. Also, in this case, the auxiliary type 1 with a smaller plate thickness
1 and 11 alone cannot maintain the foaming pressure of the foamed heat insulating material 6, resulting in curved deformation of the inner box 4, especially the central part. However, in the case of the above structure, Since the auxiliary molds 11, 11 are provided in addition to the fixed mold 10 having a predetermined thickness and protrude from both sides of the fixed mold 10, they are able to withstand the foaming pressure of the foam insulation material 6 and the depth of the inner box 4. No deformation or the like occurs.

The present invention can be applied to the general manufacturing of insulation boxes other than refrigerator boxes, and other points such as the specific plate thickness of the auxiliary type may be modified as appropriate without departing from the gist of the invention. obtain.

[Effects of the invention] As is clear from the above description, according to the invention, the material is inserted into the inner box having an undercut portion on the side surface and is injected and filled between the inner box and the outer box. A holding mold device that receives the foaming pressure of a foam insulation material has a fixed mold placed at the back of the inner box, and a fixed mold that is thinner than the fixed mold and extends laterally from the fixed mold. It comprises an auxiliary mold that is placed along with the fixed mold on the back surface of the inner box, and a movable mold that is movable along the auxiliary mold in a direction towards and away from the side surface of the inner box. This feature allows the inner box to be held down with almost no gaps.
This has the excellent effect of being able to be manufactured without causing concave deformation or the like.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a general conventional structure, and FIG. 3 is a sectional view showing a different conventional structure. In the figure, 1 is an undercut part, 4 is an inner box, 6 is a foam insulation material, 10 is a fixed type, 11 is an auxiliary type, 12
indicates a movable type.

Claims (1)

[Scope of utility model registration request] It is inserted into the inside of an inner box having an undercut part on the side surface and receives the foaming pressure of a foamed heat insulating material injected and filled between the inner box and the outer box,
A fixed mold is arranged at the back of the inner box, and an auxiliary mold is thinner than the fixed mold and extends sideways from the fixed mold, and is arranged at the back of the inner box together with the fixed mold. and a movable mold that is movable along the auxiliary mold in a direction towards and away from the side surface of the inner box.