JPH06207334A - Synthetic fiber false-twisting machine having hole opened in groove of hot plate - Google Patents

Abstract

PURPOSE:To provide a heating process operable without necessitating harmful substance to cause the environmental pollution problem, having suppressed energy consumption to decrease the electric power consumption to a little over 1/4 of the conventional heating process, facilitating the maintenance and inspection, having flexibility in the setting of pitch between spindles and the temperature control of each spindle and capable of avoiding the occurrence of secondary disaster in the event of accident such as fire and earthquake. CONSTITUTION:The back side of the yarn-contacting face of a conventional hot plate is filled with closed vapor of thermal medium and, accordingly, it has been impossible to bore a hole on the yarn-contacting face. The present hot plate has an electric heater at the back of the hot plate, the hot air is passed through the hole opened on the hot plate to the yarn-contacting face and the twist yarn is passed through the hot air atmosphere in a groove. The back side of the hot plate contacting with the heater is roughened to form fine unevenness and coated with a composite heat-absorbing and generating material having far infrared radiation effect such as ceramics to uniformize the temperature on the yarn-contacting face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims at energy saving of a heating device by improving a hot plate of a false twisting machine in a synthetic fiber production line, and at the same time, makes it possible to average the heating temperature of an object to be heated by heated air. is there.

[0002]

2. Description of the Related Art In a synthetic fiber production line, there is a false twist heater process in the spinning process. This is a method of manufacturing synthetic fibers such as permanent press processing and elastic processed yarn by twisting synthetic fibers to heat and soften them by utilizing the thermoplasticity of synthetic fibers.
It has an important position as one process of processing technology. As for the shape of the false twist heater hot plate, each company in Japan and overseas adopts the groove width, groove depth and curvature of the yarn contact surface that are most suitable for their products, but the heat source is an electric heater. The indirect heating method in which organic compounds such as dowsome and therms are heated to circulate heat medium vapor is mainly used. In addition, as a heat medium for indirect heating, there is a cast heater system in which an electric heater is cast into a metal such as aluminum to indirectly heat a hot plate, but the heat medium vapor heating system is excellent in the uniformity of temperature distribution.

[0003]

However, heating by a heating medium vapor of an organic compound or heating by a casting heater such as aluminum is required, and not only the hot plate of the yarn contacting surface but also the heat radiating surface has four surfaces, resulting in a large energy loss. Is. In addition, the amount of heat dissipated by the heater jacket of the heating medium heating unit is large, and a large amount of heat insulating material is required to assemble the false twisting machine. The current false twisting machine requires extra resources and labor to push up the product price. The result is.

[0004]

According to the present invention, a heating system for a yarn contact surface heating plate is structured such that a vacuum layer is formed around the electric heater and only the heating plate receives the heat generated by the electric heater. The present invention relates to a hot plate of a lost vacuum jacket type false twisting machine. The hot plate of the false twisting machine must supply a stable heat to the twisted yarn passing through the yarn contact surface in the groove of the hot plate while always maintaining a constant temperature. Heat is supplied to the twisted yarn by making the hot plate have a bulge with a certain curvature so that the twisted yarn passing through this groove is always in contact with the hot plate. For the twisted yarn passing through the surface, the heated air / atmosphere in the groove is an important factor for uniform heating of the twisted yarn. There is also a non-contact type of twisting yarn using a heating medium vapor as an indirect heat source in the false twisting machine, but this is used to change or fix the properties of the twisting yarn by passing through heated air. The present invention enhances the heated air / atmosphere in the groove of the hot plate to supply more stable heat to the passing twisted yarn from the surface other than the yarn contact surface. Then, a plurality of holes are formed in the groove and the high-temperature heated air in the electric heater chamber is ventilated to the yarn contacting surface in the hot plate groove.

[0005]

[Operation] Conventional hot plate shapes have undergone various changes.
It changed from the flat yarn contact surface to V groove, U groove, and groove width and groove depth, or hardening treatment of the yarn contact surface, mirror finish, etc., but from the initial electrothermal false twisting machine to the current mainstream Even for false twisting machines that use organic compounds such as Dowsome as a heat medium, false twisting machines require stable heating of the hot plate contact surface.

[0006]

[Embodiment] In the early stage of the electrothermal false twisting machine, the structure of the heater of the heat source was often one in which the nichrome wire was simply subjected to insulation treatment, and the temperature distribution was poor, and a wire breakage accident often occurred, resulting in lack of reliability.
At present, the mainstream of false twisting machines is heating the heating medium of organic compounds such as dowsam, which is easy to control temperature distribution and temperature.
There are several cases of rupture accidents because the heat medium is enclosed in a closed container.Fortunately, it does not seem to have caused a fatal accident in Japan, but dual safety devices such as temperature control and pressure control have failed. It proves that there is a possibility of.
It is fundamentally impossible to perforate the radiant heat of the heater to the yarn contacting surface by opening a plurality of holes in the groove of the hot plate according to the present invention because of the closed container in the heating method of the heating medium vapor of the organic compound. Further, according to the present invention, fine irregularities which do not affect the yarn contact surface of the surface are provided on the back side of the hot plate, thermal spraying of ceramics having a far-infrared effect, application of endothermic paint, etc. Is not possible due to the risk of

[0007]

Industrial Applicability According to the present invention, from the electric heater chamber close to the hot plate yarn contacting surface, from the plurality of holes provided with the stable heating air in the groove of the hot plate, the yarn contacting surface and the twisted yarn passing through this groove. It can be expected to diversify the product by the shape and combination of a plurality of ventilation holes formed in the groove as well as the energy saving effect because it is directly ventilated.

[Brief description of drawings]

FIG. 1 is a general-purpose cross-sectional view of a conventional false twisting machine.

FIG. 2 is a sectional view of a false twisting machine of the present invention.

FIG. 3 is a side view of the false twisting machine of the present invention.

[Explanation of symbols]

1. Is a hot plate 2. Is groove 3. Is the yarn contact surface 4. Is an electric heater 5. Is a heat medium of an organic compound 6. Is heat medium vapor 7. Is a ventilation hole opened on the hot plate contact surface 8. Is heated air 9. Is a vacuum insulation layer

Claims (2)

[Claims] 1. A synthetic fiber false twisting machine, characterized in that a hole is formed in a groove of a heating plate to be a yarn contacting surface to allow hot air to pass therethrough. 2. A synthetic fiber false twisting machine in which unevenness for the purpose of receiving heat and coating are applied to the back of the hot plate which is the yarn contacting surface.