JPS61263709A - Processing of natural rubber - Google Patents

Abstract

PURPOSE:To enable to fully automatically form and shape into a raw material rubber unit with desired weight so as to facilitate successive kneading by a method wherein masticated rubber is extruded into pellets in order to be compression-molded into the raw material rubber unit. CONSTITUTION:Masticated natural rubber is fed to an extruder 12 so as to be extruded through a perforated die into a large number of bar forms in order to be formed into a large number of pellets 3 with a cutter 12a. After that, anti-adhesive solution is showered from a shower piping 13 in order to coat the surface of the pellets 3. The resultant pellets are fed through a vibratory feeder 14 and a spiral vibratory feeder 15 to a belt conveyer 16 so as to successively fall into a measuring hopper 17 equipped with eight measuring instruments. Every time the pellets are accumulated by the predetermined weight in the hopper, the accumulated pellets are housed successively in a compression molder 19 in order to be shaped into a cubic raw material rubber unit 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for processing natural rubber. For more details,
The elasticity of natural rubber is reduced to give it plasticity, and in order to make it easier to mix with compounding agents and obtain uniform quality when mixing, the natural rubber is made into strands, masticated, left to mature for a certain period of time, and then The present invention relates to a method for processing natural rubber used for cross-mixing, in which compounding agents are uniformly kneaded into masticated natural rubber.

The masticated natural rubber used for the cross-wire is weighed to a desired weight depending on the mixing ratio with the compounding agent.

[Conventional technology]

Conventionally, natural rubber processing methods used for kneading are 9. Normally, large lumps of natural rubber arrived in bales are processed:
After cutting into blocks from 3 to 10 o'clock, the blocks from 3 to 10 o'clock are mixed low/L'30 as shown in Figure 2.
While masticating, the masticated natural rubber wrapped around the front roll 31 is cut out by one person into a thick plate-like sheet from the front roll 31, and the masticated natural rubber is masticated to approximately the desired weight. The material is rolled and rolled to form a columnar raw rubber column 40.

This raw rubber column 40 is placed on a platform scale (not shown), its weight is measured, and as a result, the excess raw rubber is removed 9 or the insufficient raw material is added.
A natural rubber processing method is known in which raw rubber columns 40 having a desired weight are obtained and kneading processing is performed using the raw rubber columns 40 having a desired weight.

However, traditional natural rubber processing methods.

The masticated natural rubber is added to the raw rubber column 40 with a desired weight.
In order to mold it, it requires hard labor as explained above, and also requires considerable skill.

This was an inefficient method of processing natural rubber.

In addition, since the raw material rubber unit 40 formed to a desired weight is left to mature for a certain period of time, it is used for kneading processing.
After powdering the outer periphery of the raw rubber columns 40 with a mold release agent so that the raw rubber columns 40 do not adhere to each other, for example, as shown in FIG. 50a' is stored in a transport truck 50, and then
This 50-ton transport cart is transferred to the vicinity of the input port of the mixed line and used for kneading processing.

Therefore, a storage member for storing the raw rubber column 40 is required, which complicates handling such as transferring the raw rubber column 40, and it is difficult to transfer and handle the raw rubber column 4o using equipment. It also had some drawbacks.

[Problem that the invention seeks to solve]

The present invention was invented in view of the above circumstances, and is capable of molding masticated natural rubber into a single raw material rubber of a desired weight without requiring the skilled and heavy labor required in the past.
An object of the present invention is to provide a natural rubber processing method that allows easy cross-wire processing.

[Means for solving problems]

In order to achieve the above object, the present invention includes a step of extruding masticated natural rubber through a multi-hole die, cutting it into a large number of pellets, and extruding it into a large number of pellets, and preventing the pellets from adhering to each other. A process of applying an anti-adhesive agent to prevent this.

While sequentially transporting the pellets coated with adhesive.

After going through a step of gathering the pellets to a desired weight, and a step of crushing the pellets together to compress them into a single raw material rubber of a certain shape,
This natural rubber processing method uses the raw material rubber and performs cross-track processing in which compounding agents are uniformly kneaded into the raw material rubber.

[Effect]

Since the present invention is configured as described above, by extrusion molding the masticated rubber into pellets, it is possible to collect pellets for each desired weight while sequentially transferring the masticated rubber to a large number of pellets 1. Next, even if an anti-adhesive agent is applied to the surface of the pellet, the pellets are crushed together by compression molding.

The pellets can easily stick together and be molded into a single raw material rubber having the desired weight and shape, and the volume is smaller than that of pellets, making it easier to handle as a raw material rubber for kneading processing.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In the figure, numeral 10 is a mixing roll, and natural rubber cut into blocks of 3 to 109 is put into the mixing roll 10 and masticated. The natural rubber 1 that is masticated in this way is made by cutting out a sheet of natural rubber with a thickness that corresponds to the gap between the mixing rolls into a tape-shaped rubber sheet 2 with a constant width. , this rubber sheet 2 is put on a mixing roll 1
0 and an extruder 4dl12 provided in front of this mixing row 1v10, the mixture is placed on a belt conveyor 11, transferred in the direction of arrow (A), and sent to an extruder 12.

Masturbated nine natural rubber is supplied. And extrusion ta
The tape-shaped natural rubber supplied to the extruder 12 is extruded into a large number of rods from a multi-hole die provided at the head of the extruder 12, and cut into pieces with a diameter of 29 mm and a length by a cutter 12a provided at the tip of the extruder 12. It is extruded into a large number of pellets 3 of about 152j1m.

Next, an anti-adhesive solution is showered onto the extruded pellets 3 from the shower pipe 13 provided just before the extruder 12, and the anti-adhesive solution is applied to the surface of the pellets 3, making it difficult for the pellets 3 to adhere to each other. Become.

Then, the pellet 3 falls onto the vibration transfer device 14 arranged to extend forward from the bottom of the cutting machine 12B, and is transferred to the 9th order Spyful vibration transfer device 15 as shown by the arrow (b). , this Spyful vibration transfer device 1
5, pellet 3 is.

As shown by the arrow (C), it is transferred toward the outlet section 15& at the top of the Spyful vibrator 15.

While being transferred in this manner, the pellets 3 are cooled and dried.

Next, the pellets 3 that have fallen downward from the outlet section 15a of the Spyful vibration transfer device are transported to the outlet section 15 of the Suvira μ transfer device
It is supplied to a belt conveyor 16 provided to extend below and in front of a.

It is transferred to the belt conveyor tip 16&, and this tip 1
Weighing hopper 17 equipped with a weight measuring device provided below 6a
Gradually falling inside, 10-2! It is stored intermittently in sequence until a predetermined weight is reached within a range of l, and each time it is stored to a predetermined weight,
The bottom of the weighing hopper 17 opens, and a predetermined amount of pellets 3 fall onto a chute 18 provided below the weighing hopper 17.

After sliding in the direction shown by the arrow (D), the pieces are sequentially stored in the storage part 19a of the compression molding machine 19 provided below the chute 18, and after the upper lid 19b is closed.

When the bottom part 190 is driven upward by the cylinder device 19d provided below, the stored pellets 3 are
Pressed between the top [19b.

3 pellets are crushed and 1 width is 3001FN, length is so
omm, and is molded into a rectangular raw material rubber unit 4 with a height of Zoo to 3001#I.

The raw rubber single bodies 4 molded in this manner are sequentially sent out in the direction shown by the arrow (E), and then the raw raw rubber single bodies 4 are fed into a mixer (not shown) such as a pan-bari mixer. When the pellets 4 are weighed, the spyful vibration transfer device 15 and the belt conveyor 16 are temporarily moved. The weighing hopper 17 stops, the bottom of the weighing hopper 17 opens, and pellets 3 of a desired weight are dropped onto the chute 18.

Furthermore, after the bottom of said weighing hopper 17 is closed.

Spyful vibration transfer device 15 and conveyor belt 1 again
6 is adapted to be driven.

According to the present invention, it is possible to use a skilled and efficient gj as in the past.
The masticated natural rubber can be molded into a raw material rubber unit 4 of a desired weight using a device without involving J, and the molded raw material rubber unit 4 is easy to handle such as transportation, and it can be kneaded. In processing, it has become easier to crush and can now be suitably used as a raw material rubber for kneading processing.

21 In the present invention, when processing natural rubber containing foreign substances, a strainer extruder is used instead of the extruder 12, which is a conventional method.

As a separate process, it is necessary to remove foreign substances from the masticated natural rubber using a strainer extruder, but according to the present invention, foreign substances can be removed at the same time during extrusion molding. The value of industrial use has increased.

〔Effect of the invention〕

As explained above, according to the present invention, there is no need for skilled and heavy labor as in the past.

In addition, since the molded raw material rubber unit of the desired weight can be molded into various shapes, handling such as transportation becomes easy, and
The power and time in cross-wire processing are reduced, and by using it suitably as a single raw material rubber for cross-wire processing, it is possible to improve work efficiency and also have the effect of reducing power energy.

Furthermore, in the case of natural rubber containing foreign substances, the foreign substances can be removed at the same time as extrusion molding.

[Brief explanation of the drawing]

FIG. 1 is a process schematic diagram for explaining the present invention. FIG. 2 is a sectional view illustrating a conventional example. 1... masticated natural rubber, 3...
pellet. 4... Raw rubber alone, 10... Mixing row A/*12... Extruder, 17...
...Measuring hopper, 19...:...Press wire forming machine.

Claims (1)

[Claims] A step of extruding masticated natural rubber through a multi-hole die provided in an extruder and cutting it into a large number of pellets, and applying an anti-adhesion agent to the extruded pellets. a step of transporting the pellets coated with the anti-adhesive agent and aggregating the pellets to a desired weight; and a step of crushing the pellets that have been aggregated to the desired weight to form a raw material of a certain shape. A method for processing natural rubber, characterized in that the raw material rubber is subjected to a kneading process in which a compounding agent is constantly kneaded into the raw material rubber after the raw material rubber is compression molded. .