JPH068251A - Mold temperature control tube unit - Google Patents

Abstract

PURPOSE:To provide a temp. control pipe unit for a resin mold, especially, a reactive injection mold. CONSTITUTION:A mold temp. control pipe unit 1 is composed of a long material made of an aluminum extrudate and consists of a temp. control passage part 4 having a temp. control passage 3 of a temp. control fluid and the mold contact part 2 coming into contact with the surface of the mold integrally formed along with the temp. control passage 4 and cut into a desired length to attach the cut one to the surface of a resin mold by screwing, welding or bonding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control tube unit suitable for temperature control of a synthetic resin molding die, particularly a reaction injection molding die.

[0002]

2. Description of the Related Art Conventionally, the temperature of a mold for molding synthetic resin or the like is controlled by drilling a hole for temperature control fluid in a mold and passing the temperature control fluid through the hole. However, this method has a problem that it is not easy to punch the die itself, and a large die requires a very long drill to form a through hole, which makes it difficult to apply. . Further, as shown in FIG. 9, the temperature control of the resin mold is performed by bending a tubular body such as a bellows pipe or a copper pipe 31 into a resin mold in the middle of a process of laminating the backing of the mold with resin. It was carried out by sandwiching it between the resin mold and the laminated resin 32. However, this method has a problem that the tubular body is only sandwiched between the resins having poor thermal conductivity and therefore has extremely poor thermal conductivity and low heat exchange efficiency. Further, there is a problem that the manufacturing method is extremely complicated and inefficient.

[0003]

In view of the above situation, the inventor does not require complicated work, can be applied to a large mold, and further researches a mold temperature adjusting method with high heat exchange efficiency, The present invention has been completed.

[0004]

According to the present invention, a temperature-adjusting cavity portion having a temperature-controlling fluid circulation cavity is formed integrally with the temperature-controlling cavity portion. There is provided a mold temperature control tube unit characterized by comprising a contact portion that makes surface contact with the mold and a mold equipped with the mold temperature control tube unit.

A mold temperature control tube unit according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of one embodiment of a mold temperature control pipe unit (hereinafter referred to as a temperature control unit) according to the present invention, and FIG. 2 is a transverse sectional view thereof. The temperature control unit 1 shown in FIG. 1 has a temperature control passage portion 4 in which a belt-shaped mold contact portion 2 and a temperature control fluid passage hole (hereinafter abbreviated as temperature control passage hole) 3 in the central portion of the belt portion are formed. Has become. This temperature control unit
Manufactured by metal extrusion. A material having good thermal conductivity is preferable, and examples of such a metal include aluminum, copper, nickel, zinc, iron, and alloys thereof, but aluminum and its alloys are preferable in terms of workability. Especially prized. Examples of aluminum alloys include Al-Cu-based, Al-Si-based, Al-Mg-based and their ternary and quaternary systems. The extruded molded product is, for example, a long product having a length of about 4 m, which is cut into a desired length on site and used.

The cross-sectional shape of the temperature control tube unit 1 on the side opposite to the contact surface is not particularly limited. The shape is not limited to the rectangular shape shown in FIG. 2, but a shape similar to this such as a semicircle as shown in FIG. 3 or a flat upper surface may be used. The convex portion is not limited to one, but a plurality of convex portions may be provided. Providing unevenness on the non-contact surface side has the advantages that heat dissipation is effectively performed, unnecessary parts are removed, the temperature control unit is made lighter, and there is a part to be gripped by hand during installation work, which facilitates work. Yes, it is preferable to provide. Furthermore, a plurality of fluid temperature control passages 3 may be provided in one unit, and the position thereof does not necessarily need to be set at the center. For example, the unit cross section is formed into a key shape, and the vertical and horizontal crossing corners are formed. It may be provided in the section.
The length of the width A of the mold contact portion of the extruded temperature control unit depends on the size of the mold and the shape of the mounting surface of the temperature control unit 1, but is usually the diameter D of the temperature control passage 3. As described above, preferably, the relationship of 2D ≦ A ≦ 10D 2 is satisfied with respect to the diameter D of the temperature control circulation cavity 3. When the width A is short, the contact surface with the mold is small and heat cannot be efficiently exchanged. If the width A is large, the area occupied by each temperature control tube unit becomes large, so that the facility density of the temperature control through holes 3 becomes low, and heat exchange cannot be efficiently performed. The diameter D is preferably 20 mm or less in consideration of mounting work and the like. The thickness of the temperature control unit 1 other than the portion having the temperature control passage is 3
It is not necessary to make the diameter D or larger. In such a portion, the thickness may be 1 mm or more, preferably 3 to 20 mm.

Heat exchange with the mold is performed via the contact surface of the contact portion of the temperature control unit 1. Therefore, it is preferable that in the width A of the contact portion and the diameter D of the temperature control passage, 2D ≦ A ≦ 10D.
In addition to satisfying the above, it is necessary that the contact portion of the temperature control unit is in close contact with the mold. The contact surface is usually a flat plate, but when it is fixed with a bolt, it will be in close contact with the mold, and as shown in Fig. 4, it has a substantially convex shape in a plane perpendicular to the extrusion direction of the temperature control unit during manufacturing. Is preferred. With such a shape, when both sides of the temperature control unit 1 are fastened with bolts and fixed, the degree of close contact with the mold can be increased. For example, when the width A is 52 mm, the convex shape is
0.1 to 0.4 from the straight line connecting the ends of the contact surface with the width A
It is preferable that the shape bulges outwardly by mm, and if it exceeds this range, the adhesiveness is rather deteriorated or a large strain is generated when tightening the bolt, which is not suitable.

[0008]

The temperature control unit 1 is used by being attached to the mold by a conventional method such as attaching screws, bonding or welding. For example, there may be mentioned a method in which a fool hole is provided in a portion of the temperature control unit 1 where the temperature control hole 3 is not provided, and a bolt is screwed through the fool hole into a female screw provided in a mold to fix the bolt. Alternatively, a hole mounting jig may be used to sandwich and press between the mold and the jig. There is also a method of fixing with an instant adhesive. The screwing method is preferable from the viewpoint of free mounting. In the case of using a screw, it is preferable to form the fixing screw pitch as close as possible in order to secure the close contact with the mold surface. Specifically, it is preferable to install the facility every 200 mm or less. At both ends of the temperature control cavity 3, connection parts with other tubes are formed. For example, cut the coupler screw and screw in the pipe, connect it to the metal pipe or resin pipe threaded back and forth through a joint, or fit a rubber hose into the pipe and tighten the band around the fitted rubber hose. To connect. The temperature control unit 1 is, for example, as shown in FIG.
It is fixed on the top and is connected in a hairpin shape by a flexible hose 14 and connected to the controller 15 to form a passage for the temperature control fluid.
The temperature control fluid is used by cooling or heating cooling water, hot water, oil or the like to a desired temperature.

An example of how the temperature control unit is used in a mold is as follows. (1) In the case of a combination type mold, a mold base material 11 and a vertical reinforcing plate 23 are used between the upper reinforcing base plate 21 and the lower reinforcing base plate 22 as shown in the mold sectional view of FIG. After assembly, the temperature control tube unit 1 is attached by, for example, screws. (2) In the case of a sheet metal structure die, as shown in the die cross-sectional view of FIG. 7, between the upper reinforcing base plate 21 and the lower reinforcing base plate 22,
Assembling using the sheet metal structure die base material 24 and the vertical reinforcing plate 23,
The temperature control pipe unit 1 is attached by welding, for example. (3) In the case of the resin mold, as shown in the mold cross-sectional view of FIG. 8, the vertical reinforcing plate 23 and the mold surface resin layer 25 are assembled between the upper reinforcing base plate 21 and the lower reinforcing base plate 22 to form a resin layer. The temperature control unit 1 is bonded and covered with the backup reinforcing layer 26.

[0010]

According to the mold temperature control tube unit of the present invention, it is possible to easily control the temperature of a large mold for the temperature control of general molds and injection molds, especially reaction injection molds. The adjustment path can be set, and its change can be easily performed, and since the contact area with the mold is large, the temperature can be adjusted with good heat exchange efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a mold temperature control tube unit according to the present invention.

FIG. 2 is a cross-sectional view of a mold temperature control tube unit embodiment according to the present invention.

FIG. 3 is a cross-sectional view of another embodiment of the mold temperature control tube unit according to the present invention.

FIG. 4 is a cross-sectional view of another embodiment of the mold temperature control tube unit according to the present invention.

FIG. 5 is a schematic view showing an example of use of the mold temperature control tube unit according to the present invention.

FIG. 6 is an explanatory view when a mold temperature control tube unit according to the present invention is applied to a combination type mold.

FIG. 7 is an explanatory diagram when a mold temperature control tube unit according to the present invention is applied to a sheet metal structure mold.

FIG. 8 is an explanatory diagram when a mold temperature control tube unit according to the present invention is applied to a resin mold.

FIG. 9 is a cross-sectional view showing a contact state between a temperature control tube and a laminated resin according to a conventional resin mold manufacturing method.

[Explanation of symbols]

 1 Mold Temperature Control Tube Unit 2 Mold Contact Portion 3 Temperature Control Passage 4 Temperature Control Passage 11 Mold Base Material 14 Flexible Hose 15 Temperature Controller 21 Upper Reinforcement Base Plate 22 Lower Reinforcement Base Plate 23 Vertical Reinforcement Plate 24 Sheet metal structure Mold base 25 Mold surface resin layer 26 Backup reinforcement layer 31 Copper tube 32 Laminated resin

Claims (2)

[Claims] 1. A long metal material, comprising a temperature control passage having a temperature control fluid passage, and a contact portion integrally formed with the temperature control passage and in surface contact with a mold. Mold temperature control tube unit characterized by. 2. A metal long member made of a temperature control passage having a temperature control fluid passage, and a contact portion formed integrally with the temperature control passage and in surface contact with a mold. A mold characterized by mounting a mold tone control tube unit.