JPS638975B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a treatment device using an activated gas, and more particularly, the present invention relates to a treatment device using an activated gas, and more specifically, a treatment device for treating the surface of molded articles made of various materials, such as synthetic resins, using a gas activated by electric discharge under reduced pressure. The invention relates to a device for carrying out the process.

In recent years, surface treatment in which a synthetic resin molded article or the like is brought into contact with a gas activated using plasma generated by vacuum discharge, so-called low-temperature plasma, has been carried out for various purposes. Traditionally, the materials to which such surface treatments have been applied have mostly been in the form of films or sheets, and therefore conventionally known equipment has been used to apply activation to the inner surface of materials in the form of containers, tubes, etc. It has been difficult to uniformly contact the gas and uniformly treat the surface.

The present invention has been made in view of the above, and includes:
It is an object of the present invention to provide a treatment device using activated gas that can be particularly suitably used for treating the inner surfaces of containers, pipes, and the like.

The activated gas treatment apparatus of the present invention includes a reactor, a gas transport pipe for guiding the gas activated in the gas activation chamber into the reactor and ejecting it from the gas injection port at the end, and the inside of the reactor. an arm formed radially from a rotating shaft supported by a rotary shaft; and a material holding member attached to the arm to hold the material in a predetermined position facing the gas injection port.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings, taking as an example an apparatus for surface-treating synthetic resin molded products using microwave plasma. Note that the means for activating the gas is not limited to the microwave power described above, and it goes without saying that high frequency power, direct current power, etc. may be used.

Microwave power is generated in a microwave power generation device 1, passed through a protection device (isolator) 2, a power monitor class 3, and a matching device 4, and then guided to a plasma generation furnace 5 through a connecting waveguide 6. A cylindrical gas activation chamber 7 made of quartz is provided in the plasma generating furnace so as to pass through the plasma generating furnace. Since the gasification chamber becomes high temperature due to microwave irradiation, for example, a double pipe structure (not shown) may be used to store oxygen and oxygen in the inner cylinder.
A gas to be activated such as nitrogen, argon, helium, or air is introduced from the gas supply pipe 8 and placed under a predetermined vacuum, and a cooling medium is passed through the annular gap between the inner cylinder and the outer cylinder. It is desirable to perform effective cooling by doing the same.

The gas activation chamber is communicated with a gas transport pipe 10 for delivering the activation gas to the reactor 9, which transport pipe opens as a gas injection port 11 within the reactor.

A rotating shaft 12 that can rotate continuously or intermittently is supported within the reactor, and a plurality of arms 13 are usually attached radially to this rotating shaft at predetermined intervals. Each arm end has an opening in the material to be treated 14, at least at a position close to the gas injection port, so that the activated gas injected from the gas injection port uniformly contacts the surface of the material to be processed that requires surface treatment. It has a material holding member 15 that holds the material with its end facing the gas injection port. Therefore, when a material to be treated with an open end, such as a shear dish, test tube, bottle, pipe, etc., comes close to the gas injection port,
The activated gas is blown inward from the open end of the material to be treated and uniformly contacts the inner surface.

As shown in the figure, when the gas injection port faces vertically downward, an appropriate horizontal holder 1 is attached to each arm end.
6 is attached, and the material to be processed is held by a holding member disposed on the horizontal holder so that its open end is always in a horizontal position. If the member to be processed is a molded product that has an open end and can be placed stably, such as a shear dish, the holding member may be a simple plate member disposed on a horizontal holder, and the shear dish is placed on this plate member. Once placed, the shear will rotate around the rotation axis with its open end always kept horizontal.

To explain the case of processing, for example, the inner hollow surface of a bottle-shaped molded product using the illustrated device, the bottle is placed on a holding member on a horizontal holder, and then the rotating shaft is rotated at an appropriate speed. The inside of the reactor is brought to a predetermined degree of vacuum through an exhaust pipe 17 connected to a pressure reducing device (not shown). Next, the gas is sent to the plasma generation furnace at a predetermined flow rate from the gas introduction pipe, activated by irradiation with microwaves under a predetermined degree of vacuum, and is ejected from the spout through the gas transport pipe to form a bottle. The inside surface of the bottle is treated by blowing activated gas into the bottle when it approaches the spout.

As described above, according to the apparatus of the present invention, the molded product can be
For example, in the case of a container-shaped molded product, the ejected activated gas is blown into the container from the open end of the container so that it occupies a predetermined positional relationship with respect to the activated gas outlet in the reactor. In addition, since it is rotated continuously or intermittently within the reactor, it is possible to uniformly treat the inner surface of molded products, especially in the shape of containers, pipes, etc., and it is also possible to treat multiple molded products at the same time. This has the advantage that it also allows continuous processing of a large number of molded articles. Moreover, of course, the apparatus of the present invention can also be suitably used for surface treatment of film or sheet-like materials to be treated.

[Brief explanation of the drawing]

The drawing is a schematic cross-sectional view showing one embodiment of the apparatus of the present invention, and shows a processing apparatus using gas activated by microwave power. DESCRIPTION OF SYMBOLS 1... Microwave power generator, 5... Plasma generation furnace, 7... Gas activation chamber, 8... Gas supply pipe, 9... Reactor, 10... Activated gas transport pipe,
11... Activated gas injection port, 12... Rotating shaft, 1
3... Arm, 14... Molded product, 15... Molded product holding member, 16... Horizontal retainer.

Claims (1)

[Claims] 1. A reactor, a gas transport pipe that guides the gas activated in the gas activation chamber into the reactor and injects it from the gas injection port at the end, and a gas transport pipe supported within the reactor. An arm formed radially from the rotating shaft and a gas injection port at a position close to the gas injection port so that activated gas is uniformly injected to the opening end of the material to be processed. 1. A processing apparatus using an activated gas, comprising a material holding member attached to the arm for holding the material facing toward the object. 2. The activated gas processing apparatus according to claim 1, wherein the gas injection port faces vertically downward, and the holding member holds the material to be processed with its open end always horizontal.