JPH0327777Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is an apparatus for continuously molding a plastic melt, especially a molten polymer, into a block or a lump, and more specifically, a device for continuously cooling and solidifying a molten polymer. The present invention relates to an apparatus for forming a block-shaped molded product and automatically transporting and taking out the molded product.

Prior art and its problems In general, when a high molecular weight polymer such as polyester, nylon, etc. is melted and dropped or discharged downward from a container using gravity or pressure, the powder is obtained by cooling and solidifying. Usually, after being discharged into a certain shape such as a ribbon or udon shape and cooling,
A method of pulverizing into pellets, chips, etc. using a pelletizer, pulverizer, etc. is used.

However, if it is not necessary to maintain a constant shape after molding, a method is used in which the molten material is poured directly from a container into a cooling bath, cooled and solidified, and then the solidified material is taken out and made into smaller particles using a pulverizer, etc. There is.

This latter method is sometimes employed when plastic film scraps, synthetic fiber scraps, etc. are melted, cooled, solidified, and pulverized as a step prior to decomposition and recovery. In this case, conventionally, the above-mentioned polymer waste was melted in a container and then dropped into a cooling water bath placed below, where it became blocks of an appropriate size. The polymer is cooled and solidified until it solidifies, and then the block is manually transferred to another space or taken out to produce a block-shaped molded polymer. however,
Such a method is unfavorable from the viewpoint of the working environment, has poor working efficiency, and has the disadvantage that the shape and weight of the block polymer obtained are not constant, making it difficult to handle in the subsequent pulverization step.

Purpose of the invention The present invention was created in view of the above problems, and the purpose is to propose an apparatus that can save labor in manufacturing block polymers and stably obtain products of high efficiency and quality. It is something to do.

Structure of the invention In other words, the present invention is an apparatus for continuously producing block-shaped molded products by cooling and solidifying a molten polymer, in which a water-cooled bath for cooling is arranged horizontally below the discharge port of the molten polymer. A fixed tray is provided in the water-cooled bath in the longitudinal direction thereof, the rear part of which extends upwardly, and an endless band that moves at a constant speed along the longitudinal direction of the fixed tray is provided, Plate-shaped paddles that partition the fixed tray in the longitudinal direction are attached to the band at predetermined intervals, and a plurality of outlet ports are provided at regular intervals in a direction parallel to the paddles at intermediate positions between the molten polymer discharge port and the water-cooled bath. This is an apparatus for producing block-shaped molded polymers, which is characterized by being equipped with a distributor.

Embodiments Hereinafter, the present invention will be explained based on the drawings. 1 and 2 are a schematic side sectional view and a plan view showing an embodiment of the present invention.

In the figure, 1 is the machine base of the device, and the machine base 1
A rectangular water tank 2 is attached to the. Reference numeral 3 denotes a plate-shaped fixed tray, the front half 3a of which is disposed at an intermediate position inside the aquarium 2 over almost the entire length in the longitudinal direction, and the rear half 3b following the first half 3a is an inclined tray extending upwardly. They form a section and are fixed to the machine stand 1 or side plate (or pedestal) 4 via a support plate 5, respectively. Sprockets 6 are provided at both longitudinal ends of the fixed tray 3 and at an intermediate position, respectively.
7, 8 guides 9, 10, etc. are arranged, and chains 11a,
11b is stretched so as to move endlessly on both sides of the fixed tray 3. This chain 11a
and 11b, plate-shaped paddles 12 are connected at regular intervals so as to partition the fixed tray 3, and when the chain 11 is driven, the paddles 12 are connected to the fixed tray 3.
It is designed to move at a constant speed above the surface. 13
A motor is fixed on the frame 14, and is connected to the sprocket 7 through the chain 15, and moves the chain 11 by driving the motor.

A cooling water introduction nozzle 1 is located above one end of the water tank 2.
6 is provided, and a liquid flow chamber 18 is formed at the other end by a weir plate 17, and the cooling water is discharged through a discharge nozzle 19 provided at the lower part thereof.

Note that wheels 20 are attached to the machine base 1 so that it can be moved.

21 is a discharge port of a polymer melting tank located above the front part of the water tank, and a molten polymer distributor 22 is provided at an intermediate position between the discharge port 21 and the water tank. The distributor 22 has a bowl-shaped cross section and an elongated shape extending parallel to the paddle 12 direction, and has three distribution ports 23a, 23b, 23c in the longitudinal direction at the top thereof.
are provided at regular intervals.

In this embodiment, a chain is used as the endless band, but other known conductive means may be used, and the paddle may be a perforated plate, a net-like object, a rod-like object, or the like.

Effects In an apparatus configured as described above, when a molten polymer is discharged downward from the discharge port 21 of the tank in which a thermoplastic polymer such as polyesteramide is melted, the polymer first enters the distributor 22 located directly below. , three distribution ports 23a to 23c are distributed here.
It falls into the water tank 2 below. In the water tank 2, the chain 11 moves the paddle 12 over the fixed tray 3 at a constant speed, so there are three distribution ports 23a.
The molten polymer continuously discharged from ~23c is deposited onto the fixed tray 3 between the paddles 12 in an amount that matches the moving speed of the paddles 12 and the discharge speed, and is spread in a block shape around the depositing position. go.
Since cooling water is introduced into the water tank 2, the molten polymer is rapidly cooled and solidified to form blocks B of approximately the same shape and size. 2, it slides on a fixed tray 3 and moves. Next, when the block-shaped polymer B reaches the rear half 3b of the fixed tray 3, the latter half 3b is inclined upward, so as it rises, the cooling water is removed and it is naturally cooled in the atmosphere. After that, it reaches the uppermost end of the tray 3, and is dropped from there into a receiver provided at a lower position or a conveyor for the next process. Note that the rear half 3b of the tray 3 may be further actively cooled with fluid such as compressed air to remove moisture. Further, the length and width of the tray 3, the conveyance speed of the paddle 12, etc. are appropriately determined depending on the type of molten material to be treated, the amount to be treated, the size of the block, the temperature of the block after cooling, etc.
Further, depending on the processing amount and size of block B, the number of distributions by the distributor 22 may be two or four or more.
The speed of the paddle 12 may also be moved intermittently. Since the present invention has such a structure, the shape and size of the obtained block polymer are almost constant, making it extremely easy to process in the next step, and making it possible to continuously manufacture products with stable quality. It becomes possible. In addition, it becomes possible to save labor in handling such high-temperature molten materials, which is extremely effective in terms of improving the working environment and productivity.

[Brief explanation of the drawing]

1 and 2 are a schematic side sectional view and a plan view showing an embodiment of the present invention. 2...Aquarium, 3...Fixed tray, 11...Chain, 12...Paddle, 21...Discharge port, 22...
…Distributor.

Claims (1)

[Scope of utility model registration request] In an apparatus that continuously produces block-shaped molded products by cooling and solidifying a molten polymer, a water-cooled bath for cooling is installed horizontally below the discharge port of the molten polymer, and inside the water-cooled bath, A fixed tray is provided in the longitudinal direction of the fixed tray, the rear part of which extends upwardly, and an endless body that moves at a constant speed along the longitudinal direction of the fixed tray is provided. Plate-shaped paddles are installed at predetermined intervals, and a distributor is installed at a position between the molten polymer discharge port and the water-cooled bath, and has a plurality of outlet ports provided at regular intervals in a direction parallel to the paddles. A manufacturing device for block-shaped molded polymers.