JPS5823636Y2 - Media passage of hot plate for hot press - Google Patents

Description

[Detailed description of the invention] The present invention is designed to apply heat to the entire hot plate so that the entire plate-like object to be processed is heated and compressed equally when a heating medium is supplied into the hot plate in a hot press. The purpose is to form a heating medium passage with a uniform temperature distribution over the area.

Conventionally, in plate-shaped products such as laminate laminates, melamine resin laminates, and other laminated resin boards that are heat-pressed between the hot plates of a hot press, the thickness is particularly thicker at the periphery than at the center. Unevenness, uneven color tone, etc. occurred.

This means that heating media such as steam, hot water, heat-treated oil, etc. circulate through the medium passages inside the hot plate to maintain the entire hot plate at a predetermined temperature necessary for forming plate-shaped objects. This is because heat is sequentially radiated from the periphery during operation, and the temperature distribution of the entire hot plate becomes non-uniform.

The present invention eliminates the above-mentioned defects such as uneven thickness and uneven color tone that occur at the peripheral edge of a plate-shaped product, prevents a drop in temperature at the peripheral edge of the hot plate, and provides a medium path for making the finish of the plate-shaped product uniform. Embodiments thereof will be described below based on the accompanying drawings.

First, to implicitly explain the medium passage of the present invention in FIG. A central circulation passage 4 is provided so as to facilitate the circulation.

Next, a peripheral circulation passage 7 including an introduction part 5 and a discharge part 6 is provided at the inner peripheral part of the hot plate 1 at a constant interval from the outer peripheral side thereof.

In forming the medium passage consisting of the central circulation passage 4 and the peripheral circulation passage 7, as shown in FIG. 2, holes are bored vertically and horizontally at appropriate intervals in the hot plate 1, and the ends of the holes are blocked. A plug rod 8 and a blocking rod 9 that allows the heating medium to circulate in the peripheral circulation passage 7 and restricts the circulation direction of the heating medium in the central circulation passage 4 are provided.

At this time, the introduction part 2 and the discharge part 3 of the central circulation passage 4 are made of a hollow annular body, and the diameter of this hollow annular body is smaller than the diameter of the peripheral circulation passage 7, and the heating medium in the peripheral circulation passage 7 is made to intersect with the diameter of the peripheral circulation passage 7. circulation is allowed.

When forming the central circulation passage 4, instead of the meandering shape described above, as in another embodiment implicitly shown in FIG. and a discharge part 3' are provided at positions facing each other, and the introduction part 2' and discharge part 3' are connected to connecting passages 10 and 11 which are respectively perforated in the lateral direction, and the required number of perforations are further perforated in the central part. In some cases, a central circulation passage 4' is formed to be connected to the vertical hole 12 of the heating medium to circulate the heating medium.

As described above, the medium passage of the hot plate 1 is connected to the central circulation passage 4,
4' and the peripheral circulation passage 7, the plate-shaped object to be processed is A certain temperature difference is provided in the circulating heating medium so that the temperature of the hot plate becomes uniform during hot pressing, and the heating medium set at a high temperature is introduced into the peripheral circulation passage 7 where it is subjected to heat radiation.

As described above, according to the present invention, it is possible to maintain a uniform hot plate temperature during hot pressing, so it is possible to wipe out thickness unevenness, color tone unevenness, etc. that occur at the periphery of a plate-like object as described above, and to create a smooth and smooth surface. A beautiful plate-shaped product can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an implicit plan view showing one embodiment of the present invention, FIG. 2 is an enlarged sectional view of section A in FIG. 1, and FIG. 3 is an implicit plan view showing another embodiment of the present invention. . 1... Hot plate, 4, 4'... Central circulation passage, 7... Peripheral circulation passage.

Claims (1)

[Scope of utility model registration request] A peripheral circulation passage that circulates around the inner periphery as appropriate by plug rods that block the ends of vertical and horizontal openings drilled at regular intervals and an obstruction rod that regulates the circulation direction of the heating medium, and the peripheral circulation passage. A medium passage of a hot plate for hot press, which is formed by separately forming a central circulation passage that circulates inside the central circulation passage, each having an introduction part and a discharge part.