JPH0593810U - Closed rubber kneader - Google Patents

Abstract

(57) [Summary] [Purpose] The kneading rubber can be cooled in the kneading chamber. [Structure] In a kneading chamber 2 having a pair of rotatable bite-type rollers 3 and 3, an openable / closable drop door 4 and an ascending / descending floating weight 8, an upper part is provided along the axial direction of the rollers 3. A plurality of nozzles 14 are provided on the inner wall, and a sprinkler device 16 connected to the nozzles 14 for spraying water from the nozzles 14 into the kneading chamber 2 in a mist state is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a closed rubber kneader.

[0002]

[Prior Art]

 A closed rubber kneading machine conventionally provided is, for example, as shown in FIG. 3, in a kneading chamber 2 of a kneading machine main body 1, a pair of rotatable bite type rotating inwardly by a motor (not shown). Kneading rubber opened and closed by rollers 3 and 3 (not shown) and a drop door 4 for discharging the kneading rubber and an air cylinder incorporated in a hopper 5 provided above the kneading machine main body 1 and fixed above the hopper 5. 9 has a piston rod 11 connected to a piston 10 and is provided with a floating weight 8 which is fixed to one end of a piston rod 11 and which moves up and down by switching air in upper and lower air chambers 12 and 13 in a cylinder 9 by a switching valve (not shown). Then, the floating weight 8 is filled with the rubber and the compounding agent from the charging port 6 by opening the hopper door 7 with the charging port 6 provided in the hopper 5, and then descends to press and press the kneading rubber into the kneading chamber 2. After the kneading, when the kneading is completed, the drop door 4 is opened and the kneading rubber is discharged from below. The discharged kneading rubber is processed into a sheet shape by an open roll machine (not shown), and then sulfur etc. It is added and kneaded together with a vulcanizing agent. When the kneading is completed, the drop door 4 is opened again and the kneading rubber is discharged from below.

[0003]

[Problems to be solved by the device]

 In a conventional closed type rubber kneading machine, the temperature of the kneading rubber rises during kneading, so if a vulcanizing agent is added, a vulcanization reaction will occur, making it impossible to perform molding in a later step. Therefore, it is necessary to discharge the kneaded rubber once, cool it, and then knead it again with a vulcanizing agent in a kneader.

The present invention has been developed in view of the present situation, and an object thereof is to enable cooling of a kneading rubber in a kneading chamber.

[0005]

[Means for Solving the Problems]

 The structure of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The present invention has a kneading chamber 2, a pair of rotatable bite-type rollers 3 and an opening / closing unit. In a closed type rubber kneading machine provided with a drop door 4 and a floating weight 8 which can be raised and lowered, a plurality of nozzles 14 are provided on an inner wall of an upper part of the kneading chamber 2 along an axial direction of the roller 3, and the nozzle 14 A water sprinkler 16 connected to the nozzle 14 for spraying water from the nozzle 14 into the kneading chamber 2 is provided.

[0006]

[Action]

 According to the present invention, when the rotor is rotated by the above means and the rubber and the compounding agent are charged, the floating weight is lowered, and the rubber and the compounding agent are pressed into the kneading chamber and kneaded by kneading, generally, the kneading power rapidly increases. After passing the 1st peak, it descends and then rises again to reach the 2nd peak. After passing this 2nd peak, the floating weight is raised and the sprinkler is activated to atomize the water from the nozzle. After spraying, and after the temperature of the kneaded rubber has dropped, the vulcanizing agent is added and the floating weight is lowered again to knead. After the kneading is completed, the drop door is opened and the kneaded rubber is discharged.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. 1. Reference numerals 1 to 13 in the figure denote the same parts as those in the conventional example shown in FIG. 3 and the description thereof will be omitted. In the present invention, a plurality of nozzles 14 are provided on the inner wall of the upper portion of the kneading chamber 2 along the axial direction of the roller 3, and the nozzles 14 are connected through pipes 15 to mix water from the nozzles 14. A sprinkler 16 consisting of an electromagnetic valve for spraying in a mist state was provided inside.

[0008] Thus, the rotor 3 is rotated, the rubber and the compounding agent are added, the floating weight 8 is lowered, and the rubber and the compounding agent are pressed into the kneading chamber 2 and kneaded. As shown in Fig. 2, the power and temperature pattern during operation of the kneader rapidly rises and passes the first peak, then falls and rises again to the second peak. It is considered that the rubber is crushed up to the first peak inside the kneading machine, and thereafter the compounding agent is dispersed up to the second peak. On the other hand, the kneading rubber temperature in the kneading chamber 2 rises almost in proportion to the integrated value of the applied power.

After passing the second peak of the kneading power, the floating weight 8 is raised, the water sprinkler 16 is opened, and water is sprayed from the spray nozzle 14 in a mist state, and then the kneading rubber temperature is lowered, followed by vulcanization. Add the agent and lower the floating weight 8 again to knead. When this kneading is completed, the drop door 4 is opened and the kneading rubber is discharged from below.

In addition to water, for example, liquefied N ₂ gas at a very low temperature can be easily sprayed from the spray nozzle 14.

[0011]

[Effect of the device]

 As described above, according to the present invention, a plurality of nozzles are provided on the inner wall of the upper part of the kneading chamber along the axial direction of the roller, and a sprinkler connected to the nozzles for spraying water into the kneading chamber is provided. Since the temperature of the kneading rubber can be efficiently lowered in the kneading chamber during operation, the vulcanizing agent can be added in one step, and the kneading time can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a diagram showing power and temperature patterns during operation of the kneading machine of the present invention.

FIG. 3 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 2 Kneading chamber 3 Roller 4 Drop door 8 Floating weight 14 Nozzle 16 Sprinkler

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Isamu Motomura 5-717-1, Fukahori-cho, Nagasaki-shi, Nagasaki Sanhishi Heavy Industries Ltd. Nagasaki Research Institute (72) Akira Yoshida 5-717, Fukahori-cho, Nagasaki-shi, Nagasaki Address 1 within Choryo Engineering Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A closed rubber kneading machine having a kneading chamber provided with a pair of rotatable bite-type rollers, an openable / closable drop door and a vertically movable float weight.
A plurality of nozzles are provided on an inner wall of an upper portion of the kneading chamber along an axial direction of the roller, and a water sprinkler connected to the nozzles for spraying water into the kneading chamber from the nozzles is provided. Type rubber kneader.