JPS63114605A - Warmer - Google Patents

Abstract

PURPOSE:To enhance the efficiency of warming operation by a method wherein plastic material is spirally shifted by being spirally wound round the periphery of a roller so as to shift it axially from one end side of the roller to the other end side in order to take it out of the other end side of the roller. CONSTITUTION:Cooled and hardened rubber G is supplied in the wide width side inlet 5a of a wedge-shaped space 5 at the one axial end side of a roller 4 by means of a conveyer 21. Because the irregularities are provided on the outer periphery of the roller 4 at the one axial end side, the irregularities bite in the rubber G, thereby forcibly pulling the rubber G in a wedge-shaped space 5. Since the rubber G is low in temperature and consequently does not be allowed to deform by flowing plastically, the rubber G is compressed from both sides by an arcuate surface 3 and the roller 4, resulting in being cracked internally or crushed into small pieces and slightly raising the temperature through kneading. The rubber G is spirally shifted round the roller to the other axial end of the roller 4. The rubber G is warmed up with every one turn round the roller 4 by passing through the wedge-shaped space 5. Since the wedge- shaped space 5 is formed between the recessed arcuate surface 3 and the projecting surface of the roller 4, the space 5 can be extended over a long distance, resulting in enhancing the warming-up effect.

Description

[Detailed description of the invention] spicy 1 The present invention relates to a heating device for heating a plastic material.

Eme 2 and 3 As a conventional heating device, for example,
The one described in Publication No. 705 is known. This roller is placed on the side of the rough surface roll with a slight gap between it and the rough surface roll that rotates horizontally. It is equipped with a roll. When heating a rubber-like material using this device, first, while rotating the rough-surfaced and smooth-surfaced rolls, the rubber-like material is supplied between them to one end in the axial direction of both rolls. As a result, the rubber-like material moves in a spiral manner while wrapping around the outer periphery of the smooth roll.
The rubber-like material is taken out from the other axial end of both rolls, but at this time, the rubber-like material passes between both rolls multiple times, so it is kneaded and heated each time it passes. In addition,
In this product, a material pick-up part with an arc-shaped cross section is arranged around the smooth roll, but this material pick-up part is a guide for automatically winding the rubber-like material around the smooth roll at the start of work. , there is no heating effect.

However, in such a heating device, since the outer circumferences of both rollers are convex curved surfaces, the outer circumferences of both rollers suddenly approach each other, and as a result, the rubber-like material is mixed. The distance to be trained was only a short distance. For this reason, a single heating device cannot heat the rubber-like material to the required temperature, so two or more heating devices are arranged in series, and the rubber-like material is heated one after another by these heating devices. I was trying to put it in. For this reason, in the past, there were problems in that the overall equipment cost was high, the heating work was inefficient, and moreover, a large space was required.

□ This problem arises when a heating block has a concave arcuate surface on one surface, and a wedge-shaped space that gradually narrows in the circumferential direction is placed between the heating block and the arcuate surface. a roller for forming a plastic material, and a rotating means for rotating the roller toward the narrow side of the wedge-shaped space, and a plastic material is supplied from one end in the axial direction of the roller and wound spirally around the roller. This can be solved by moving the plastic material and taking it out from the other end in the axial direction of the roller, so that the plastic material passes through the wedge-shaped space multiple times and is heated.

(2) Supplying the plastic material to the wide side of the wedge-shaped space at one end in the axial direction of the roller while keeping the roller rotating by a rotating means. As a result, the plastic material moves from one end of the roller toward the other end in the axial direction while being spirally wound around the roller, and is taken out from the other end of the roller. Since the plastic material moves spirally in this way, the plastic material passes through the wedge-shaped space multiple times from one end to the other, but each time it passes through this wedge-shaped space, Since the plastic material is forced into a gradually narrowing space, R
It is kneaded and the temperature rises. here,! Since the shaped space is formed between the concave arc surface and the convex curved roller, it can extend over a long distance in the circumferential direction. The insertion effect is improved. Moreover, as mentioned above, since the wedge-shaped space can extend over a long distance in the circumferential direction, the thickness of the plastic material can be significantly reduced by increasing the difference between the wide side and the narrow side of the wedge-shaped space. This further improves the heating effect. For this reason, it is possible to raise the temperature to the required temperature by simply passing the plastic material through one heating device.

Practical Example Hereinafter, a first example of the present invention will be described based on the drawings.

In FIGS. 1 and 2.3, 1 is a heating device for heating a plastic material 1, such as rubber G, and this heating device 1 has a heating block 2. As shown in FIG. This heating block 2 has an arcuate surface 3. 4 has its rotational axis slightly eccentric from the center of curvature of the arcuate surface 3, and
It is a cylindrical roller arranged apart from the arcuate surface 3, and a wedge-shaped space 5 is formed between the outer periphery of the roller 4 and the arcuate surface 3 over approximately 90 degrees in the circumferential direction. 5, its width A, that is, the distance between the outer periphery of the roller 4 and the arcuate surface 3, gradually decreases from the wide side entrance 5a to the narrow side exit 5b. e, 7 is a heating block
These side plates 6 and 7 close both ends of the wedge-shaped space 5 and rotatably support the roller 4.

A motor 8 as a rotating means is connected to the roller 4, and the operation of the motor 8 causes the roller 4 to move from the wide side outlet 5a toward the narrow side outlet 5b, that is, in the direction of arrow B.
Rotate in the direction. A large number of grooves 11 are formed on the outer periphery of one axial end of the roller 4, and these grooves 1.1 are equally spaced apart in the circumferential direction. As a result, the outer periphery of the roller 4 on one end in the axial direction becomes uneven, but in the present invention, it may be formed with a large number of protrusions to make the outer circumference uneven. Here, the groove 11 may be parallel to the rotational axis of the roller 4, or may be inclined at an acute angle to the rotational axis as in this embodiment. It has a smooth surface. Reference numeral 12 denotes a part of a cover integrally formed with the heating block 2, and this part 12 of the cover is connected to the narrow side outlet 5 of the wedge-shaped space 5.
b extends along the outer periphery of the roller 4 in the direction of arrow B. This cover portion 12 is attached to at least the roller 4
extends to the top of the roller, as in this example.
It may extend to a position slightly past the top of 4.

A gap 1 having the same width as the narrow side outlet 5b of the wedge-shaped space 5 is provided between the inner surface of the cover part 12 and the outer periphery of the roller 4.
3 is formed. Further, the cover part 12 surrounds at least one end of the roller 4 in the axial direction, and may surround the entire area of the roller 4 in the axial direction as in this embodiment. These protrusions 14 are provided on the inner surface, and these protrusions 14 may be airfoil-shaped (rectangular) as in this embodiment, or bottle-shaped (cylindrical). Again, in FIG. 1.2.3, 21 is a conveyor installed just before one end of the roller 4 in the axial direction, and this conveyor 21 conveys, for example, cooled and hardened rubber G to one end of the wedge-shaped space 5. It is supplied to the wide side population 5a. Reference numeral 22 denotes a cap that is removably attached to the cover part 12 directly above the roller 4, and this cap 22 comes into sliding contact with the outer periphery of the axially opposite end of the roller 4, and also has a space between it and the outer periphery of the roller 4. An opening 23 having a predetermined shape is formed through which the rubber G passes. By providing the mouthpiece 22 at the outlet of the rubber G as in this embodiment, the heating device 1 can also function as an extruder. In addition, when such a cap 22 is not provided, a knife may be provided in place of the cap 22, and the rubber G may be taken out in the form of a band.

Next, the operation of the first embodiment of the present invention will be explained.

Now, the cooled and hardened rubber G is being supplied to the wide side entrance 5a of the wedge-shaped space 5 at one end of the roller 4 in the axial direction by the conveyor 21, and on the other hand, the roller 4 is being rotated in the direction of arrow B by the motor 8. do. Here, since the rubber G is hardened, it cannot be easily drawn into the wedge-shaped space 5, but in this embodiment, since the outer periphery of the roller 4 on one end in the axial direction is provided with unevenness, the unevenness is The rubber G caught in the rubber G is forcibly drawn into the wedge-shaped space 5. The rubber G drawn into the wedge-shaped space 5 in this way is initially too low to be fluidized and deformed, so it is compressed from both sides by the arcuate surface 3 and the rollers 4, and as a result, cracks are formed or broken inside. The mixture is kneaded into small pieces, and the temperature rises slightly as the mixture is kneaded. However, since the temperature rise of the rubber G is small after passing through the wedge-shaped space 5 once, the rubber G remains in the above-mentioned state. For this reason, rubber G
If the rubber G is discharged from the narrow width side outlet 5b as it is, there is a risk that it will be scattered around. However, in this embodiment, a cover part 12 that also surrounds the narrow width is provided, so that the rubber G is not in the above-mentioned state. However, due to the rotation of the roller 4, it is conveyed through the gap 13 to the top of the roller 4, and from there it slides down on the roller 4 toward the wide side entrance 5a.

As a result, the rubber G is fed back into the wide side population 56 of the wedge-shaped space 5 without scattering to the surroundings.Next, this rubber G passes through the wedge-shaped space 5 again and is heated, and then passes through the gap 13. It passes through and returns to the wide side population 5a located slightly away from the other end. At this time, since the passage of the rubber G is obstructed by the protrusion 14, heating is facilitated. In this way, the rubber G moves spirally around the roller 4 and reaches the other end of the roller 4 in the axial direction, but each time the rubber G moves around the roller 4 once, it passes through the wedge-shaped space 5 and is heated. The rubber G softens and wraps around the outer periphery of the roller 4 before reaching the other end of the roller 4 in the axial direction.

Here, since the wedge-shaped space 5 is formed between the concave arc-shaped surface 3 and the convex curved roller 4, it can extend over a long distance, and as a result, the heating effect is improved. Moreover, since the thickness of the rubber G can be significantly reduced by increasing the difference between the wide side inlet 5a and the narrow side outlet 5b, the heating effect is further improved. Then, when the rubber G reaches the other end in the axial direction of the roller 4, the rotational speed of the roller 4, the difference between the wide side groove 5a and the narrow side exit 5b, and the rubber The number of times G passes through the wedge-shaped space 5 is adjusted in advance. Next, the rubber G heated to the required temperature is taken out at the other end in the axial direction of the roller 4, but at this time, it passes through the opening 23 of the mouthpiece 22 and is molded into a predetermined cross section.

FIG. 5.6 shows a second embodiment of the invention. In this embodiment, when the rubber G moves to the other end in the axial direction of the roller, it softens considerably and comes to wrap around the roller 4, so only one end in the axial direction of the roller 4 is surrounded by the cover part 31. Further, since the cover portion 31 is not present on the other end of the roller 4 in the axial direction, the cap 32 is provided at the narrow-width side outlet 5b of the wedge-shaped space 5 directly below the roller 4. As a result, the structure of this embodiment is simpler than that of the first embodiment.

7 and 8 are symbolic views showing a third embodiment of the present invention. In this embodiment, a feed roller 41 parallel to the roller 4 is placed at a position facing the groove 11 directly above the wide side entrance 5a.
The feed roller 41 is rotated in the direction of arrow C, that is, in the opposite direction to the rotational direction of the roller 4, by a motor (not shown). As a result, the rubber G is sandwiched from both sides by the feed roller 41 and the roller 4, and is forcibly fed into the wedge-shaped space 5, so that even if the rubber G has a particularly high hardness, it can be reliably supplied.

As explained above, according to the present invention, the heating effect is improved, making it possible to raise the temperature to the required temperature by simply passing the plastic material through one heating device. .

This reduces equipment costs, improves work efficiency, and saves space.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG.
FIG. 4 is a partially cutaway front view of the heating block; FIG. 5 is a front view showing a second embodiment of the present invention; FIG.
6 is a cross-sectional view taken along m-=arrow in FIG. 5, FIG. 7 is a front view showing the third embodiment of the present invention, and FIG. 8 is a cross-sectional view of the IV-TV shown in FIG. 7.
It is an arrow sectional view. l...heating device 2...heating block 8.
...Arc-shaped surface 4...Roller 5...Wedge-shaped space 8...Rotating means patent applicant Brideston Co., Ltd. Agent Patent attorney Ta 1) Toshio Figure 1■...Heating device 2... Heat heating professional, Ri3.
...Arc-shaped surface 4...Roller 5...Wedge-shaped space
8...Rotating means Fig. 3 Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Claims] A heating block having a concave arcuate surface on its surface, a roller disposed away from the arcuate surface and forming a wedge-shaped space that gradually narrows in the circumferential direction between the heating block and the arcuate surface, a rotating means for rotating toward the narrow side;
The plastic material is supplied from one end of the roller in the axial direction, is moved around the roller in a spiral manner, and is taken out from the other end of the roller in the axial direction, thereby supplying the plastic material into the wedge-shaped space. A heating device characterized in that heating is performed by passing through a plurality of times.