JPH0574813U - Deformed die heater and cooler - Google Patents

Abstract

(57) [Abstract] [Purpose] In a heater and cooler of a deformed cylinder C such as a twin-screw cylinder and other deformed molds, a heater for a deformed die that can obtain a good close contact and is easy to mount and Provide a cooler. [Structure] A heater or a cooler in which a heating element 1 or a cooling pipe 3 bent into an appropriate shape is cast in a metal 2 having good thermal conductivity, and is divided into two on a diagonal line of a profile die. However, the tightening portion 4 at the diagonal position can be tightened by the tightening tool 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In this invention, heating elements such as sheathed heaters and cartridge heaters are bent into an appropriate shape and cast into aluminum or other metal with good thermal conductivity, and cooling pipes are also heated. This relates to a cooler that is cast in a metal with good conductivity, and more specifically, the outer circumference of a cylinder or other mold of an injection molding machine, extrusion molding machine, etc. used for molding rubber, plastic, etc. The present invention relates to a heater and a cooler mounted on a surface and used.

[0002]

[Prior Art]

 As the cylinder as described above, there are a uniaxial cylinder having a circular cross section and a deformed cylinder having a biaxial structure and having a non-circular cross section. As a heater for a uniaxial cylinder, a circular heater along the outer circumference of the cylinder can be tightened with a fastener at an appropriate location, or a one-piece type, or a two-divided configuration with two opposing locations. There are two-piece types that are designed to be tightened at the tightening part. Since the outer shape of the uniaxial cylinder is a simple circular shape, it is easy to attach the heater, and even contact with the outer peripheral surface of the cylinder can be obtained.

On the other hand, the one-piece type cannot be mounted as a heater for a deformed cylinder such as a biaxial cylinder. Therefore, the two-piece type divided into two and the four-piece type divided into four are used.

FIG. 4 shows an example of a two-piece type, which is a two-piece body having a shape along the outer peripheral surface of the deformed cylinder C and is fastened with fasteners at fastening portions L provided at the upper and lower portions. Further, FIG. 5 shows a two-piece type in which the fastening portions L provided on both sides are fastened. FIG. 6 shows a four-piece type, which has a four-divided structure of divided heaters along the upper and lower surfaces of the odd-shaped cylinder C and divided heaters along the both side surfaces, respectively, and a separate tightening member is used. The structure was such that they were attached or bolts were planted in the cylinder, the split heater was provided with bolt insertion holes, and tightened with nuts to fix. In the figure, T indicates a heater terminal.

[0005]

[Problems to be solved by the device]

 By the way, in a uniaxial cylinder, it is easy to install and evenly adhered to the outer peripheral surface of the cylinder can be obtained, but in the deformed cylinder, it is difficult to obtain a uniform adhered state to the outer peripheral surface of the cylinder.

That is, in the two-piece type shown in FIGS. 4 and 5, the side surfaces forming the curved surface can obtain a relatively good adhesion state, but the adhesion failure is inevitably caused on the upper and lower surfaces. Therefore, the four-piece type shown in FIG. 6 is provided so that it can easily be placed on each surface, but it is not only complicated to mount, but also has a drawback that a missing part of the heater occurs.

Further, not only when the deformed cylinder or the mold that requires heating is used, but also when the cooler formed by casting the cooling pipe into the metal having good thermal conductivity is mounted on the deformed cylinder or the mold. Had similar problems.

Therefore, an object of the present invention is to obtain a good adhesion state in a deformed cylinder such as a biaxial cylinder or other deformed mold (hereinafter collectively referred to as a deformed die), and to easily mount it. It is about to provide heaters and coolers for various shaped dies.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, a two-piece type is adopted in this invention, and it is divided into two parts on the diagonal line, not on the upper and lower surfaces and both side surfaces of the die, and can be tightened with fasteners at the tightening part at the diagonal position. And adopted the configuration.

That is, the heater for the irregular die according to the present invention is a heater in which a heating element that is bent into an appropriate shape is cast into a metal having good thermal conductivity, and has a non-circular irregular cross section. It is a heater for a modified die that is used by mounting it on the outer periphery of a modified die that has the following features.It is divided into two parts on the diagonal line of the modified die and can be tightened with fasteners at the tightening part at the diagonal position. It has a feature.

The heater terminals can be centrally provided at one end of the tightening portion. Also, when casting a cooling pipe for forced cooling together with a heating element, the heater terminal can be concentrated at the end of the upper tightening part and the joint part of the cooling pipe can be concentrated at the end of the lower tightening part. ..

The present invention also provides a cooler of a modified die for the same purpose. In other words, it is a cooler in which a cooling pipe bent into an appropriate shape is cast into a metal with good thermal conductivity, and is used by mounting it on the outer periphery of a modified die with a non-circular modified cross section. This is a cooler for a modified die, which is divided into two parts on a diagonal line of the modified die and which can be tightened by a fastener at a tightening portion at the diagonal position.

[0013]

[Action]

 As described above, when the heater and the cooler are divided into two on the diagonal of the odd-shaped die and tightened by the fasteners at the tightening portions at the diagonal positions, the tightening force is even on the upper and lower surfaces and the left and right side surfaces. Since it is applied, a uniform clamping force is applied to the entire outer peripheral surface of the die, and a uniform contact state is obtained over the entire surface.

Further, since it is a two-piece type, it can be easily attached by mounting it on the outer periphery of the die like the conventional two-piece type and then tightening it with a fastener at the tightening portion.

[0015]

【Example】

 Embodiments shown in the accompanying drawings will be described below. FIG. 1 is a front view showing an embodiment of a casting heater mounted on the outer peripheral surface of a deformed cylinder C as an example of a heater according to the present invention.

The heater is constructed by casting a sheathed heater 1 bent into an appropriate shape into a metal 2 having good thermal conductivity, such as aluminum, together with a cooling pipe 3, and as a whole. Is provided in a two-divided manner on the diagonal line of the deformed cylinder C, and can be fastened by a fastener 5 at a fastening portion 4 at the diagonal position. Reference numeral 6 is a heater terminal provided at the end of the upper tightening portion 4, and 7 is a joint portion of the cooling pipe 3 provided at the end of the lower tightening portion 4, which is used for cooling medium such as water or oil. It constitutes the intake and exhaust ports. The fastener 5 consists of both screw bolts 5a, a plurality of disc springs 5b, washers 5c and nuts 5d. When the cylinder is attached, a slight gap is left between the two fastening portions as a thermal expansion margin of the casting heater. ing. FIG. 3 shows a state in which electric heating is performed. In an actual use state, the gap is eliminated and the entire surface of the cylinder is in a close contact state.

Of course, the illustrated embodiments are merely examples, and the present invention is not limited to these structures. For example, the heater terminal may be provided above the central portion and the joint portion of the cooling pipe may be provided below the central portion.

Furthermore, in the above-mentioned example, the heaters provided in a two-divided shape are not fixed to each other and are brought into contact with the outer peripheral surface of the deformed cylinder, and are tightened by the fasteners 5 in the tightening portion 4. Although it is attached, it is also possible to adopt a structure that facilitates positioning by inserting the insertion hole into the bolt that is planted from the cylinder only one of them and tightening it with the nut. It is desirable to install the bolts at one place in the center of either the upper or lower surface of the cylinder. Further, one bolt may be planted in the central portion of both upper and lower surfaces so that both split heaters can be fixed in the central portion. As described above, even if the bolts are inserted and fixed with the nuts at the central portions of either one or both of the split heaters, the tightening force at the tightening portion 4 in the diagonal position is sufficiently effective, so that the present invention The goal of is fully attainable. It also has the advantage that it can be positioned and the mounting work is easy.

In addition, in the portion along the horizontal surface of the cylinder, if the inclination in the direction slightly separated from the cylinder surface in the vicinity of the tightening portion 4, for example, about 0.5 ° is provided, It was found that a good creeping property was obtained with respect to the outer peripheral surface of the cylinder.

In the above description, the heater has been explained exclusively, but it can be similarly applied as a cooler, and in the case of merely cooling, a heating element such as a sheathed heater is used in place of an appropriate shape. A bent cooling pipe is cast into a metal with good thermal conductivity, divided into two parts on the diagonal line of the profile die, and the fastening part at the diagonal position can be tightened with fasteners. For example, a cooler having a similar function can be used.

[0021]

[Effect of the device]

 As is clear from the above detailed description, the heater and the cooler of the modified die according to the present invention are of a two-piece type, and it is easy to attach them to the modified die. Since it is provided on the upper side, it is possible to obtain a uniform tightening state over the entire upper and lower surfaces and both side surfaces, and it is possible to obtain an even close contact state with respect to the entire die outer peripheral surface.

Further, in the case of a heater, if desired, the heater terminals can be concentrated on one end of the tightening portion, so that the wiring is easy and the single-phase or three-phase power supply can be distinguished. Accordingly, the wiring can be easily changed.

Furthermore, when a cooling pipe is also cast in the heater, a heater terminal may be provided at an upper end of the fastening portion and a joint portion for absorbing and draining the lower fastening end may be provided. Since it is possible to separate the electric system and the piping system, it is easy to perform electrical work, piping work, maintenance and inspection, and there is no risk that the terminal part gets wet even if water leaks from the joint part. Have. Furthermore, there is little risk that the operator's hand will come into contact with the terminal part when carrying out piping work around the intake and drainage while the power is on.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a modified die heater according to the present invention,

FIG. 2 is a side view of the same with the fasteners omitted.

FIG. 3 is a front view showing a state where the heater is energized and used,

FIG. 4 is a front view showing an example of a two-piece type of a conventional cast-in heater for heating a deformed cylinder.

FIG. 5 is a front view showing another example of a conventional two-piece type,

FIG. 6 is a front view showing a conventional four-piece type cast-in heater.

[Explanation of symbols]

1 ... Seesheater 2 ... Metal 3 ... Cooling pipe 4 ... Tightening part 5 ... Tightening tool 6 ... Heater terminal 7 ... Joint part C ... Deformed cylinder

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29C 47/78 7717-4F

Claims (4)

[Scope of utility model registration request] 1. A heater in which a heating element bent into an appropriate shape is cast into a metal having good thermal conductivity, and is used by mounting it on the outer periphery of a modified die having a non-circular modified cross section. In the heater of the odd-shaped die, the heater of the odd-shaped die is divided into two on a diagonal line of the odd-shaped die and can be tightened by a fastener at a tightening portion at the diagonal position. 2. The heater for a modified die according to claim 1, wherein a heater terminal is provided at the end of the tightening portion. 3. A cooling pipe is cast together with a heating element,
The heater of a modified die according to claim 1, wherein a heater terminal is provided at an end of the upper tightening portion, and a joint portion of a cooling pipe is provided at an end of the lower tightening portion. 4. A cooler comprising a cooling pipe bent into an appropriate shape and cast into a metal having good thermal conductivity,
In the cooler of the irregular die that is used by mounting it on the outer periphery of the irregular die having a non-circular irregular cross section, it is divided into two on the diagonal line of the irregular die, and it is tightened by the fastener at the tightening part at the diagonal position. A cooler of a possible irregular die.