JPS6186243A - Heat pipe roll - Google Patents

Abstract

PURPOSE:To obtain the suitable title roll as a device performing vacuum molding of a large number of recessed parts on a synthetic resin film by a method wherein the same external circumferential part of a roll obtained by inserting a heat pipe through a thick part of the roll along an axial direction of the roll is superior in temperature evenness and response in heating and cooling. CONSTITUTION:A plurality of pieces of holes 2 is penetrated through a thick part close to the external circumference of a roll 1 along an axial direction of the roll 1 and a heat pipe 3 is inserted into the hole. A predetermined zone of the roll 1 is made into the target roll which can be heated or cooled suddenly by a method wherein heat exchange is made to perform through a cooling and heating devices 10, 11 of a heat exchanger device 5 by providing a plurality of sheets of fins 4 on one side of the heat pipe 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat pipe roll suitable for uniformly heating or cooling synthetic resin films and the like.

[Conventional technology]

Cool and heat the synthetic resin film, roll the synthetic resin film around a forming roll having many recesses, vacuum form the many recesses, and spread a flat synthetic resin film onto this to form a sealed hollow. In the above-mentioned apparatus for producing hollow bodies of synthetic resin films such as those used to form bodies, rolls are required to heat and cool the synthetic resin film to a uniform temperature.

Conventionally, this type of roll has a heating means such as a heater inside the roll, a roll that circulates cooling water from a cooling source outside the roll into the io-l, and a roll that has an induction heat source inside the roll and A jacket chamber for enclosing a heat medium is provided in the thick wall part, and the heat medium is heated by induction heat. Also, as a publicly known technology,
6-64697 etc. are listed.

Those using heaters and circulation cooling are heated by heat transfer,
This type of cooling system has the disadvantage that it is not possible to maintain a uniform temperature over the entire length of the roll, and the response to temperature changes is slow, and it takes time to adjust the strips, which reduces yield and operation rate, and increases production efficiency. There was a drawback that high quality products could not be obtained.

Rolls using induction heating have a uniform temperature, but they have the disadvantage of being complex and expensive, and often have insufficient roll cooling, resulting in slow response to cooling temperature changes. .

The 1st model published in 1983-64697 is mainly based on uniform temperature heating and does not have a cooling structure.

Furthermore, with conventional rolls, it is impossible to form heating and cooling zones all at the same time within the periphery of one roll, but the synthetic resin film wound around the periphery of the roll is heated at one position and simultaneously formed at another position. There was a demand for a roll with a structure that allows the material to be cooled and sent to the next process.

[Problems to be solved by the invention] The present invention has been made based on the above requirements as well as solving the above-mentioned drawbacks. The object of the present invention is to provide a heat/guid roll that has a quick response, allows heating and cooling zones to coexist within the same roll periphery, and improves product yield and saves energy.

[Failure to solve the problem]

In order to achieve the above object, the present invention provides a heat pipe roll in which a heat pipe is inserted into the thick part of a hollow cylindrical roll, which is bored in the axial direction of the roll, and a heat pipe in which the heat pipe is heated. The means is a heat pipe roll provided with exchange means.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, a plurality of holes 2 are formed on the same circumference in the thick wall portion near the outer periphery of the roll l, which are formed through the roll axis in the roll axis direction. A heat guide 3 is fitted into this hole 2. The number of heat pies f3 is selected to be an appropriate number that matches the temperature uniformity accuracy required for the roll 1.

As is well known, the heat pipe 3 is formed to condense the gaseous medium that evaporated on the high temperature side on the low temperature side and to maintain humidification over its entire length, and there are various shapes and performances on the market. There is.

By fitting this H)/Ff3 onto the roll 1, it is possible to equalize the temperature of the entire roll 1 in the axial direction.

The heat guide 3 is relatively inexpensive and easy to obtain, and as described above, it can be easily implemented by simply fitting it into the hole 2, and the roll of the prior art does not meet the required quality. Although it is impossible to significantly change the roll structure and cost depending on the height, in this example, by changing the quantity of the heat guide 3, it is possible to easily manufacture a roll that matches the required quality. can.

FIG. 2 shows an example of a heat exchanger equipped with heat exchange means.

Items with the same reference numerals as in FIG. 1 indicate the same items or items with the same function.

A plurality of finches are provided on one end side of the heat pie f3. A heat exchange means 5 made of a low self-containing liquid or a heating liquid is installed at a predetermined position, and the finch rotated and sent to the position is immersed therein for heat exchange.

With the above configuration, the heat pie f3 is heated or cooled, and the roll 1 is uniformly heated or cooled.

In addition, since the heat/quiz 3 is actively heated or cooled by the heat exchange means 5, it is effective for rapidly heating or cooling the roll 1.

FIG. 3 shows another embodiment, in which one end side of the heat pipe 3a, in place of the fins 4 in FIG. At the same time, the same effect as that shown in FIG. 2 can be obtained.

FIG. 4 shows yet another embodiment.

The heat exchange means 5a includes a constant temperature liquid tank 6, a heating unit 7 for preheating the constant temperature liquid tank 6, a cooling unit 8 for cooling the constant temperature liquid tank 6,
heating unit 7 and cooling unit'.

and a temperature control unit 9 that controls the temperature of the heat sink 8. The fin 1 attached to the heat nozzle 3 contacts the constant humidity liquid tank 6 and exchanges heat therewith.

With the above configuration, the roll 1 can be uniformly maintained at a desired temperature and can quickly respond to rapid changes in conditions.

FIGS. 5 and 6 show still another embodiment.

The heat exchange means 5 is composed of a cooling means 10 and a heating means J1, which are respectively arranged at predetermined positions.

The fin/1 contacts the cooling means 10 and the heating means 11 at the above position.

When the fins 4 of the heat pipe 3 are in contact with the cooling means 10, the outer periphery of the roll 1 near the heat pipe 3 is cooled. Conversely, when the fins 4 of the heat pipe 3 are engaged with the heating means 11, the outer periphery of the roll 1 near the heat pipe 3 is heated. Therefore, a heating zone and a cooling zone coexist on the outer periphery of the roll 1.

As shown in FIG. 6, by partitioning adjacent heat pipes 3 with a heat insulating layer 12, heat transfer in the heating and cooling zones of the roll 1 is reduced, and the heating and cooling zones on the outer circumference of the roll are clearly defined. can be achieved.

For example, it is effective for applications where the synthetic resin film is heated when it comes into contact with the roll 1, and after molding, the synthetic resin film is cooled to facilitate peeling off from the roll 1. As mentioned above, 4, this was not possible with the prior art.

Note that the heat insulating layer 12 is not necessarily required in this embodiment.

In the above embodiment, the heat exchange means 5.5'ai heat
Although the quiz 3 is provided only on one end side, it is of course not limited to this, and may be provided on both ends.

Further, the heat exchange means 5, 5a, etc. are not limited to those having the above structure.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, temperature uniformity can be obtained with a simple structure, quick response to heating and cooling can be achieved, and a heating zone and a cooling zone can coexist within the outer periphery of the same roll. , - The synthetic resin film can be heated and cooled during rotation. Furthermore, with the above-mentioned faster response, the operating rate and yield of the equipment are improved, and Heat Pie! The use of can increase the effect of energy saving.

[Brief explanation of the drawing]

FIG. 1 is an axial sectional view of one embodiment of the present invention, FIG. 2 is an axial sectional view of another embodiment, FIG. 3 is a partial sectional view of another embodiment having the same function as FIG. 5 and 5 are axial sectional views showing still another embodiment, and FIG. 6 is a side view of FIG. 5. 1... Roll, 2... Hole, 3, 3a... Heat A
'/(f, 4... fin, 5, 5a... heat exchange means, 6... constant temperature liquid or bar, 7... heating unit, 8...
...Cooling unit, 9...Temperature control unit, io...
Cooling means, 11... Heating means, 12... Heat insulation layer.

Claims (1)

[Claims] 1. A heat pipe roll in which a heat pipe is inserted into a hole bored along the axial direction in a thick walled part of a hollow cylindrical roll. 2. A heat pipe characterized in that a heat pipe is inserted into a hole bored along the axial direction in the thick walled part of a hollow cylindrical roll, and a heat exchange means is provided at the end of the heat pipe. roll. 3. The plurality of heat pipes inserted into the thick part of the roll are insulated by a heat insulating layer, and the heat exchange means is formed of something that heats and cools the heat pipes at predetermined positions. The heat pipe roll according to claim 2, characterized in that: