JPS6349320A - Container having arbitrary temperature controller for extruder - Google Patents

Abstract

PURPOSE:To obtain a proper inner cylinder temp. and to make the product quality uniform and good by boring cooling medium supply-and-discharge holes at plural positions in the longitudinal direction of a spiral cooling hole in a container having a heating means and separately controlling supply-and-discharge of the cooling medium based on plural temp. detection signals in the longitudinal direction of the peripheral wall. CONSTITUTION:A spiral cooling hole 6 is formed on the periphery of an inner cylinder 2 of a container 1 having a heating means by a main heater 4. Plural outward oriented cooling medium supply-and-discharge holes 9 are bored in the longitudinal direction of the cooling hole 6 of an outer cylinder 3 being fitted to the cylinder 2 and are connected to supply-and- discharge pipes 11, 14. The temp. of the cylinder 2 is controlled to be at a proper temp. for an extruded stock by adjusting supply water amounts to the holes 9 by control of supply- and-discharge valves 12, 13 based on signals from a temp. detecting member 15 inserted into the cylinder 3 in the longitudinal direction. The above control reduces variations in grain sizes in the longitudinal direction of the extruded stock and in strength of the extruded stock, makes the quality of continuously extruded products uniform and good, and contributes the operating ratio improvement of an extruder and the productivity improvement of extrudes stocks.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a container for an extruder, and more particularly to the structure of a container for an extruder used for extruding aluminum or its alloys, copper, or the like.

2. Description of the Related Art As shown in FIG. 4, this type of container for an extruder is generally equipped with a heater (24) on the peripheral wall (21) of the container, which is made up of multiple layers of an inner cylinder (22) and an outer cylinder (23). and a temperature detection means (2) such as a thermal lightning pair arranged with its detection end facing inside the peripheral wall (21) in the vicinity of the approximately central portion in the length direction.
Based on the temperature detected by 5), the temperature of the entire container can be controlled to be substantially uniform throughout its length depending on the type of extruded material.

In this way, conventional containers are simply designed to maintain the billet temperature inside the container in a state with low deformation resistance and low frictional resistance without lowering the billet temperature during extrusion using heating means. There wasn't.

Problems to be Solved by the Invention However, with the recent progress in the development of extrusion alloys, various alloys that require even stricter control of extrusion conditions have come into practical use. Containers equipped with heating means often make delicate control of extrusion conditions difficult. In addition, when dissimilar alloys are sequentially extruded using a single extruder, depending on the type of alloy being extruded, the container temperature and die temperature may be adjusted at various points along the length of the container. It has become necessary to make subtle adjustments not only to temperature increases but also to temperature decrease controls. Furthermore, variations in quality in the length direction of the extruded material, that is, harmful changes in grain size, strength, etc., are dominantly influenced not only by the extrusion speed but also by the extrusion temperature. In order to keep it small, it is necessary to control the temperature of each part in the longitudinal direction of the container individually even during extrusion.

The present invention has been made in view of the above-mentioned demands, and an object of the present invention is to provide a container for an extruder which can suitably meet the demands and whose temperature can be freely controlled.

Means for solving the interleaving point In order to achieve the above object, the present invention provides a cooling means in addition to a heating means so that the temperature of each part in the longitudinal direction of the container can be freely and variably adjusted. This is what I did.

That is, in the present invention, a spiral cooling hole is provided inside a peripheral wall of a container provided with a heating means, and a plurality of spiral cooling holes are provided at a plurality of locations in the length direction of the cooling hole, and the inner ends thereof communicate with the cooling hole. A refrigerant supply/discharge hole is provided, and the outer end of the refrigerant supply/discharge hole is connected to a refrigerant supply circuit and a refrigerant discharge circuit communicating with a refrigerant supply source via control valves, respectively, and a length within the container peripheral wall. The gist of the present invention is a container for an extruder that can freely control temperature, and is characterized by being provided with temperature detection means at a plurality of locations in the width direction.

Embodiment In the embodiment shown in FIGS. 1 to 3, the extrusion container has a peripheral wall (1) that has an inner cylinder (2) and an outer cylinder (3) as in the conventional product.
It is composed of two layers, and a main heater (4) is installed around the peripheral wall (1) over almost the entire length, similar to the conventional product.

As shown in FIG. 2, inside the peripheral wall (1), the ram is inserted into the outer cylinder (3) from its end face into the elongated hole (5a) at a plurality of locations in the circumferential direction as shown in FIG. Separate auxiliary heaters (5) (5) are provided on each side, so that the die side and the ram side in the longitudinal direction of the container can be auxiliary heated separately.

Furthermore, cooling holes (6) are spirally provided in the container peripheral wall (1) over substantially the entire length thereof. The cooling holes (6) are formed between the inner cylinder (3) and the outer cylinder (3) by carving a spiral groove (6a) on the outer peripheral surface of the inner cylinder (2), which is the innermost layer, as shown in Fig. 3. One end of the ram side has a refrigerant vent hole (7) on the lower side of the peripheral wall (1).
), and the refrigerant is removed by opening the on-off valve (8).

The cooling holes (6) are located at the inner ends of a plurality of refrigerant supply and discharge holes (9) that are bored in the radial direction at predetermined intervals at a plurality of locations along the length of the container peripheral wall (1). is communicated with. And these multiple refrigerant supply and discharge holes (9)
The outer ends of each are connected via a supply control valve (12) to a refrigerant supply circuit (11) leading to a common refrigerant supply source (10), and at the same time to a refrigerant discharge circuit via a discharge control valve (13). (14).

Therefore, by opening any arbitrary supply control valve (12) and discharge control valve (13), the refrigerant can be made to flow intensively to a specific part in the length direction within the container peripheral wall (1). ing.

Further, inside the outer cylinder (3) of the container peripheral wall (1), temperature detection members (15) consisting of thermocouples are provided at multiple locations in the length direction at the lower part of the outer cylinder (3). The temperature in each part can be detected individually, and based on the detection signal, either or both of the main heater (4) and the auxiliary heaters (5) and (5) are operated, or each separate control valve ( 12) The temperature of each part in the length direction of the container peripheral wall (1) can be controlled to a desired temperature by controlling the opening and closing of (13). In addition, in the figure (
15a) is a hole for inserting a temperature detection member such as a thermocouple.

In the above container, heating of the entire peripheral wall (1) is performed exclusively by energizing the main heater (4), and individual auxiliary heating of the dice side or the ram side is performed using the auxiliary heater (5) (
5) by selectively energizing either one of them. In addition, if you want to lower the temperature of the peripheral wall (1), you can do so by opening the supply control valve (12) and the discharge control valve (13) and allowing a refrigerant such as water to flow through the cooling hole (6).
At this time, if it is necessary to cool only a predetermined portion in the length direction of the peripheral wall (1), the same discharge control valve (12) belonging to the refrigerant supply/discharge hole (9) corresponding to the portion valve(
13) is selectively opened to allow the refrigerant to flow only within a predetermined length range of the entire length of the spiral cooling hole (6), thereby cooling the corresponding portion.

Effects of the Invention As described above, this invention is equipped with a heating means like a conventional container, and is additionally equipped with a cooling means, so that it is possible to control not only the temperature increase of the container peripheral wall but also the temperature decrease. This can also be done quickly, and changes in the type of extrusion alloy can be quickly responded to. Furthermore, the cooling means described above is performed by causing a refrigerant to flow through a spiral cooling hole provided in the peripheral wall, and moreover, the cooling means communicates with the cooling hole at a plurality of locations in the length direction of the cooling hole. A plurality of refrigerant supply/discharge holes and respective supply/discharge control valves allow the refrigerant to partially flow through a portion of the cooling hole (6), thereby partially distributing the refrigerant to each portion in the length direction of the container peripheral wall. Since the cooling can be controlled, it is possible to control the temperature gradient in the length direction of the billet loaded into the container, and in turn, it is possible to control the quality such as crystal grains and strength in the length direction of the extruded material. Variations can be reduced.

In addition, the surrounding wall temperature of the container can be adjusted both overall and partially.
Since it is possible to freely raise or lower the temperature in a short time, it is also possible to continuously extrude alloys with widely different preferred processing temperatures under processing temperature conditions that suit each alloy. It can contribute to improving the operating efficiency of the machine and the productivity of extruded materials.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an extrusion container according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a side view of the inner cylinder, and Fig. 4 is a conventional container. FIG. (1) Container peripheral wall, (2) Inner cylinder, (3)
... Outer cylinder, (4) ... Main heater, (5) ...
Auxiliary heater, (6)...Cooling hole, (9)...Refrigerant supply/discharge hole, (10)...Refrigerant supply source, (11)...Refrigerant supply circuit, (12)...Supply Control valve, (13)...
Discharge control valve, (14)...refrigerant discharge circuit, (15)...
...Temperature detection member. Figure 2 above

Claims (2)

[Claims] (1) A spiral cooling hole is provided inside the peripheral wall of the container equipped with a heating means, and a plurality of refrigerant supply/discharge ports are provided at multiple locations along the length of the cooling hole, the inner ends of which communicate with the cooling hole. A hole is provided, and the outer end of the refrigerant supply and discharge hole is connected to a refrigerant supply circuit and a refrigerant discharge circuit that communicate with a refrigerant supply source via control valves, respectively, and is connected to a refrigerant supply circuit and a refrigerant discharge circuit that communicate with the refrigerant supply source through control valves, respectively, and the outer end of the refrigerant supply and discharge hole is connected to a refrigerant supply circuit and a refrigerant discharge circuit that respectively communicate with a refrigerant supply source through a control valve, and the outer end of the refrigerant supply and discharge hole is connected to a refrigerant supply circuit and a refrigerant discharge circuit that communicate with a refrigerant supply source through control valves, and a A container for an extruder that can freely control temperature, characterized in that temperature detection means are provided at multiple locations. (2) The temperature can be freely controlled according to claim 1, wherein the container peripheral wall is composed of two or more layers, and cooling holes are formed by carving spiral grooves on the outer peripheral surface of the innermost layer. extruder container.