JPS6142938Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a contact type heating device for a synthetic fiber false twisting machine. The false twisting speed of synthetic fibers has made remarkable progress in recent years, and the production speed is also increasing significantly. In response, the length of heaters has also increased and various improvements have been made to their arrangement. Heaters for false twisting machines can be roughly divided into two types: contact type and non-contact type, but as mentioned above, contact type has good heat transfer effect in order to prevent the heater from becoming large due to high processing speed. Heaters are mainly used. As shown in FIGS. 1 and 2, an example of such a contact type heater is a heater body 1 curved in an arched shape having a thread guide groove 2 through which the thread runs in contact with the heater body 1, an insulating box 3 surrounding the heater body 1, and a heat insulating box 3 surrounding the heater body 1. A groove (or slit) that includes the lid 4, etc.
The attached one is used. However, with such conventional heaters, as the yarn processing speed increases as mentioned above, the occurrence of stuck substances due to oil adhesion to the heater surface rapidly increases, the cleaning cycle becomes more frequent, and the crimp performance deteriorates. A problem has arisen. As a result of repeated studies on such problems, the inventor of the present invention found that in the conventional device, the heater body 1 is curved in an arched shape as shown in Figs. Therefore, the structure of the lid 4 had to be a straight plate-like body with uniform thickness, and this created a large space at the heater entrance and exit, which was a major cause of the problem.After further investigation, we decided to They came up with an idea. That is, the present invention provides a contact type heater for a synthetic fiber false twisting machine, which has a heater body with a yarn guiding groove for heating the yarn and a lid that can be opened and closed at the front of the heater body. This invention is characterized in that a spacer made of a heat insulator is removably provided between the thread guide groove and the lid, and has a protrusion that closes the front space of the thread guide groove. Hereinafter, the present invention will be explained based on the drawings. Third
The figure is a longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line B-B' in FIG. 3. In the figure, 1
Reference numeral 1 denotes a heater main body which has a heating thread guide groove 12 in which the thread runs in contact with the thread.As with conventional heaters, the front surface has an arched heating surface 13, and a hollow heating chamber 14 is formed inside for heating. Steam enters through a supply port (not shown), and condensate exits through a discharge port. As the heating means, a fluid heating method using any medium such as water vapor, heat medium vapor, or liquid can be used. In addition to heating with fluid, known means such as electrical heating means may be used. 15 is a heat insulation box surrounding the heater body 11; 16 is the heater body 11;
The upper lid is attached to the front side of the housing by a hinge 17 so as to be openable and closable. Reference numeral 18 is a pin that fixes the upper lid 16. 19 is a spacer arranged along the heating surface 13 between the heater main body 11 and the upper lid 16;
A protrusion 19' is formed on the surface facing the thread guide groove 12, and the protrusion 19' fits tightly so as to close the space at the front end (upper part) of the thread guide groove 12. The spacer 19 is preferably made of a cover whose outer surface is surrounded by a metal such as stainless steel and filled with a heat insulating material, but the spacer 19 is not necessarily limited to this. 20 is spacer 19
It is a pin to hold the In addition, spacer 19
As shown in FIG. 4, it is preferable that the space between the front end of the thread guide groove 12 and the upper lid 16 is substantially closed, but it is also possible to close only the thread guide groove 12.
Further, the spacer 19 and the upper lid 16 do not necessarily have to be made into one continuous body, but may be made into two or more divided bodies. What is important here is to close the space at the front end of the thread guide groove 12 and make the space small enough to prevent the thread Y from coming into contact with the spacer 19. This is extremely effective in improving thermal efficiency and reducing adhesion of solidified substances. If the depth of the thread guiding groove 12 is made small, it is considered that it is not necessarily necessary to insert a spacer into the thread guiding groove 12 as in the present invention, but the thread guiding groove is provided at the front surface to facilitate threading (threading). Since the sides are made larger and U-shaped, the groove cross section at the front end becomes larger, and if the depth of the groove is small, when twisting occurs suddenly at the start of operation,
The running thread may jump up and jump out of the thread guide groove, and to prevent this, the thread must be made deeper (usually around 10 mm). The cross-sectional area of the yarn guide groove 12 regulated by the spacer 19 varies somewhat depending on ^{the usage conditions, but it is preferably in the range of 9π to πmm 2 .} If the flow becomes large, the thermal efficiency will decrease and the adhesion of solidified substances will increase. If the flow becomes smaller than πmm ² , the thermal efficiency will be improved, but the threads will be easily damaged, which is not preferable. Since the present invention has such a configuration, thermal efficiency is improved and adhesion of solidified substances is reduced, making it possible to obtain yarn of stable quality over a long period of time. In addition, using a heater as shown in Fig. 3 and changing the groove cross-sectional area, polyethylene terephthalate POY SD 115 denier, 36 filament and SD 230 denier, 30 filament were processed at a processing speed of 700 m/min, heater temperature of 230°C, and external contact. When false twisting is performed using a friction disk, crimp performance can be improved depending on the cross-sectional area of the thread guiding groove, as shown in the table below.

[Table] Note) The percentage increase in crimp performance is calculated without a spacer.
This value is based on the case where
Further, the structure of the present invention is extremely simple, and the top cover can be opened and closed very easily without any special structure, making it easy to clean the heater and inspect the inside. In particular, since conventional equipment can be used as is, its utility value is great. Although this embodiment has been described for the case of one thread, it goes without saying that it can also be applied to a heater that processes a plurality of threads at the same time (having a plurality of thread guiding grooves).

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing a conventional embodiment, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, Fig. 3 is a longitudinal cross-sectional view showing an embodiment of the present invention, and Fig. 4 is a longitudinal cross-sectional view showing a conventional embodiment. B- in Figure 3
B' is a cross-sectional view taken along the arrow. 11... Heater body, 12... Thread guiding groove, 15...
...Heat box, 16...Top lid, 19...Spacer, 19'...Protrusion.

Claims (1)

[Scope of utility model registration request] In a contact type heater for a synthetic fiber false twisting machine, which has a heater body with grooves for heating the yarn and a lid that can be opened and closed located at the front of the heater body, the yarn is placed between the heater body and the lid. A contact type heater for a synthetic fiber false twisting machine, characterized in that a spacer made of a heat insulator is removably provided and has a protrusion that closes a front space along a groove for heating the fibers.