JPH0347709A - Kneading method of molding material - Google Patents

Abstract

PURPOSE:To stabilize a quality by improving working efficiency in kneading, by a method wherein a compounding material for a molding material is extruded while feeding quantitatively and continuously to a kneading machine and kneading and when the molding material to be extruded is measured and a measured value attains a fixed value, the same is loaded into a roll kneading machine for roll kneading. CONSTITUTION:A molding material prekneaded by a continuous kneading machine 1 is extruded continuously to a measuring machine 9 through an outlet part of the continuously kneading machine 1. The measuring machine 9 is formed of a hopper, damper and measuring device provided with a load cell and the molding material to be extruded through the continuous kneading machine 1 is measured automatically by the measuring machine 9. At a point of time when the molding material attains to a weight per one batch, the molding material is taken out of the measuring machine 9, loaded into a roll kneading machine 2 and kneading is performed by a roll kneading machine 2. Workability in kneading can be improved by setting up a kneading and extruding rate of the continuous kneading machine 1 so that hours required for kneading one batch with the roll kneading machine 2 become almost identical with those required for extruding the molding material equivalent to the weight per one batch from the continuous kneading machine 1 like this.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for kneading thermosetting resin molding materials.

[Conventional technology]

When kneading and preparing thermosetting resin molding materials such as phenol resin, melamine resin, and YURI 7 resin, powder compound materials and liquid compound materials are each weighed and put into a pressurized knee gun. This is done by preliminary kneading with a pressurizer, then discharging it from a pressurized niegu, and then feeding it into a roll kneader and kneading it with rolls.

[Problem to be solved by the invention]

However, with this method of pre-mixing using a pressurized knee goo, the work efficiency is poor because the work of the pressurized knee goo is patch work. During the process of discharging the molding material, the operation of the pressurized kneading machine had to be stopped, and kneading could not be performed during this time, resulting in a problem of poor work efficiency. Furthermore, the pressurized knee goo has poor evacuation properties when being dispensed, and a part of the molding material remains in the pressurized knee goo before the next new molding material is put into the pressurized knee goo and kneaded. There was also the problem that a part of the molding material was subjected to excessive kneading action in the pressurized niegoo, resulting in unstable quality. The present invention has been made in view of the above points, and it is an object of the present invention to provide a method for kneading a molding material that has excellent kneading efficiency and can stabilize the quality of kneading.

[a! Means for Solving Problem 1 The method for kneading a molding material according to the present invention is a method of kneading a molding material by quantitatively supplying a compounded material of a molding material to a continuous kneader 8!1.
Extrude the molding material while kneading it, starting with continuous kneader 1! liI! The extruded molding material is weighed, and when the measured value reaches a predetermined value, the molding material is put into the roll kneader 2 and kneaded by the rolls. [Function] In the present invention, the molding material is produced in a continuous process by quantitatively feeding the blended material of the molding material to the continuous kneader 1 and extruding the molding material while kneading it in the continuous kneading Wi1. Preliminary kneading 11a can be carried out, and continuous kneading 811
The molding material continuously extruded from the molding material is weighed and when a predetermined value is reached, it is fed into the roll kneading 8!2, so that the roll kneading can be carried out in a continuous flow from the preliminary kneading by the continuous kneader 1. Therefore, the working efficiency of kneading can be improved, and the kneading can be carried out with stable quality without the problem of discharging the molding material as in the case of pre-kneading with a pressurized kneading machine.

【Example】

The present invention will be described in detail below using examples based on diagram 70 shown in FIG. (It shows the flow.) Molding materials are prepared by kneading various powder compounding materials such as resins and fillers and liquid compounding materials such as hardening agents.
First, a plurality of types of powder compounding materials are mixed using pre-goo 5 such as ribbon pre-goo. The powder blended materials mixed in Prengoo 5 are discharged from the damper of Prengoo 5 by a discharge screw feeder, passed through an iron remover to remove metal impurities by magnetization, and then fed into a hopper equipped with a powder level meter. Ru. When the powder blended material remaining in the hopper reaches the upper limit of the powder level meter, the operation of the above-mentioned discharge screw is stopped. Then, the powder blended material in this hopper is fed to the continuous kneading machine 1 by a feeder 6 formed by a screw feeder or the like. For example, the feeder 6 adjusts the rotation of the inverter motor to adjust the rotation speed of the screw! ! ! By doing so, a predetermined amount of the powder compound material is quantitatively and continuously supplied to the continuous kneading machine 1, and the powder compound material thus supplied is continuously kneaded by forced feeding. 1. On the other hand, the liquid compounding material is configured to be continuously and quantitatively supplied in a predetermined amount to the continuous kneading machine 1 by operating the percussion pump 7. This liquid percussion pump 7 is formed, for example, by a planter-type metering pump, and the supply amount of the liquid compounding material is automatically controlled by the controller 8. That is, the controller 8 is formed with a computer-controlled control circuit, and is electrically connected to the feeder 6 and the liquid pump 7, respectively. Then, the controller 8 detects the amount of powder compounded material supplied by the feeder 6, and the controller 8 controls the percussion pump 7 according to this detected value, automatically adjusting the amount to match the amount of powder compounded material supplied. Ni rI! 4, and the liquid blending material is supplied to the continuous kneading machine 1. The amount of powder compounded material supplied by the feeder 6 can be detected, for example, by receiving data signals such as the rotation speed of the screw of the feeder 6 with the controller 8. The amount of liquid compounded material supplied by the pump 7 can be controlled, for example, by controlling an electric servo unit with a signal from the controller 8 to adjust the reciprocating stroke of the plunger of the liquid percussion pump and adjusting the discharge amount. It is something that can be done. The continuous kneading machine 1 is formed by an extruder type kneading machine, for example, an extruder type kneading machine having a set of twin screws. The powder compound material quantitatively fed from the feeder 6 and the liquid compound material quantitatively fed from the liquid percussion pump 7 are subjected to kneading action in the continuous kneading machine 1 as the screw rotates. Continuous kneading machine 1
is transferred to the exit section at the tip. The temperature of the continuous kneader 1 is controlled by a temperature controller. In addition, the rotation speed of the screw in continuous kneading 8!1 is fed back so that the blended materials quantitatively added to continuous kneading 1fi1 as described above can be kneaded and sent without stagnation or shortage. The feeder 6 and the percussion pump 7 are controlled so that the kneading speed and the supply rate of the mixed materials from the feeder 6 and percussion pump 7 are in harmony. The molding material pre-kneaded by the continuous kneader 1 in this manner is continuously extruded from the outlet of the continuous kneader 1 to a total of 11fi9. The measuring device P119 is formed by a measuring device H equipped with a hopper, a damper, and a load cell, and the molding material extruded from the continuous kneading machine 1 is automatically weighed by the weighing device 9. This measurement can be performed not only by weighing, but also by controlling the extrusion time from the continuous kneader 1. Continuous kneading W
The molding material continuously extruded from i1 can be weighed with a weighing machine 9 and kneaded all at once with a roll kneader 2.
When the weight per batch is reached, the molding material is taken out from the weighing machine 9 and put into the roll kneader 8!2, where it is kneaded by the roll kneader 2. The molding material sufficiently kneaded by the roll kneader 2 in this manner is taken out from the roll kneader 2 and stored, and taken out and used for molding as needed. Here, the continuous kneading machine 1 is adjusted so that the time required to knead one batch with roll kneading +1!2 is approximately equal to the time required to extrude the molding material of this weight per batch from the continuous kneading fit. By setting the kneading extrusion speed, continuous kneading by continuous kneading 8!1 can be followed by roll kneading in a continuous flow [! 2, roll kneading can be performed and the workability of kneading can be improved. Of course, for example, if two roll kneaders 8!2 are used for one continuous kneader 1, roll kneader 8!2 is used. ! [The kneading and extrusion speed of the continuous kneader 1 is set so that two batches of molding material can be extruded in the time required to knead one batch with fi2. In addition, if there is an abnormality in the kneading process by roll kneading 8!2 or the kneading process by continuous kneader 1, this will be detected and fed back, and the operation of the feeder 6 and percussion pump 7 will be automatically stopped. This is to stop the series of steps. In the manner described above, it is possible to perform operation under centralized control or remote control. By standardizing the conditions for each type of operation under centralized control or remote control, it is possible to stabilize the quality of even unstable kneading materials such as thermosetting resin molding materials. It is possible. [Effects of the Invention] As described above, in the present invention, the compounded materials of the molding material are quantitatively supplied to the continuous kneading machine and extruded while being kneaded by the continuous kneading machine, and continuously extruded from the continuous kneading machine. When the molding material is weighed and the measured value reaches a predetermined value, the molding material is put into the roll kneader and kneaded by the rolls. Therefore, the molding material can be pre-kneaded in a continuous process using the continuous kneader. This molding material is then continuously extruded from the continuous kneader, and when it reaches a predetermined value, it is fed into the roll kneader, which allows roll kneading to be carried out in a continuous flow from preliminary kneading by the continuous kneader. The kneading efficiency can be improved, and the kneading can be performed with stable quality without the problem of discharging the molding material, which is the case when preliminary kneading is carried out using a pressurized kneading machine.

[Brief explanation of drawings]

FIG. 1 is a diagram 70 showing an embodiment of the kneading process of the present invention, where 1 is a continuous kneader and 2 is a roll kneader.

Claims (1)

[Claims] (1) Quantitatively feeding the blended material of the molding material to the continuous kneader and extruding it while kneading it with the continuous kneader, and weighing the molding material continuously extruded from the continuous kneader until the measured value reaches a predetermined value. Then, this molding material kneading method is characterized in that the molding material is put into a roll kneader and kneaded by rolls.