JP2002327983A - Microwave drying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide microwave drying apparatus, in which moisture of packed small pieces of a synthetic resin material is evaporated uniformly in a short time. SOLUTION: A microwave oscillator 3 is installed on the top of a drying container 2. Corrugated metal sheets 6 are provided to the bottom wall and sidewalls of the container. A synthetic resin-made bottom sheet 7 and side sheets 9 are provided in the inside of the metal sheets. The bottom sheet and side sheets are connected to a driving means 12 fixed to the container 2 through an extension/contraction rod 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave drying apparatus for drying a packaged synthetic resin piece used as a raw material of various synthetic resin products.

[0002]

2. Description of the Related Art Conventionally, various drying means have been employed in order to reduce the amount of water permeated into packaged synthetic resin pieces to 15% or less. Drying method removes water from the outside of the synthetic resin piece material, so it takes time to reduce the internal water content to 15% or less, and the outside synthetic resin piece material is melted. There is no means for uniformly evaporating the water content of the synthetic resin piece material in a short time.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a microwave drying apparatus which can uniformly and quickly evaporate the moisture of a packaged synthetic resin piece. And

[0004]

According to a first aspect of the present invention, there is provided a microwave drying apparatus, comprising: a microwave oscillating device disposed above a drying container; Corrugated metal plates disposed on the bottom wall and side walls,
3. The microwave drying apparatus according to claim 2, further comprising a synthetic resin bottom plate and a side plate disposed inside the corrugated metal plate. A driving means fixed to the drying container via

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the microwave drying apparatus of the present invention.

In FIG. 1, a microwave drying apparatus 1 according to the present invention includes a drying vessel 2, a microwave oscillating apparatus 3 installed on the upper surface of the drying vessel 2, a filter 4 mounted on a side face of the drying vessel 2, and An exhaust fan 5 is provided. The microwave oscillator 3 includes a microwave oscillator 3a, a waveguide 3
b, the horn 3c, and the horn 3c is arranged so as to face the inside of the drying container 2.

The bottom wall and the inner wall of the drying vessel 2 are provided with a corrugated metal plate 6 made of a material such as aluminum or stainless steel having a sawtooth cross section, and a bottom plate 7 and side plates 9 made of synthetic resin. The synthetic resin small piece material 10 packed in is mounted.

The bottom plate 7 and the side plate 9 are respectively connected to driving means 12 such as a motor fixed to the drying container 2 via a telescopic rod 11, and move the bottom plate 7 in the vertical direction and the side plate 9 in the horizontal direction. Making it possible. Note that the number of the telescopic rods 11 and the number of the driving means 12 are arbitrary.

The operation of the microwave drying apparatus of the present invention having the above-described configuration will be described. When the microwave is radiated from the horn 3c of the microwave oscillating device 3 to the synthetic resin piece 10 in the drying container 2, the microwave is randomly projected on the synthetic resin piece by the corrugated metal plate 6, and the microwave Due to the above characteristics, moisture evaporates from the inside of the synthetic resin piece material 10, but at the same time, moisture contained inside the outer surface portion of the packed synthetic resin piece material 10 also evaporates. The evaporated water is discharged to the outside via the filter 4 and the exhaust fan 5.

At this time, the drive means 12 is controlled so that the bottom plate 7
By changing the distance between the side plate 9 and the drying container 2 in a range of 1/4 wavelength to 2 wavelengths, it is possible to control the evaporation time of the moisture inside the outer surface portion of the packed synthetic resin piece material 10 in the vicinity. It is possible to uniformly evaporate the water in the synthetic resin piece material 10 in a short time.

[0011]

As is apparent from the above description, according to the present invention, the microwave oscillating device provided on the upper portion of the drying container and the corrugated metal provided on the bottom and side walls of the drying container are provided. By providing the plate and the synthetic resin bottom plate and the side plate disposed inside the corrugated metal plate, it is possible to uniformly and quickly evaporate the moisture of the packed small synthetic resin material.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a microwave drying device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Microwave drying device 2 ... Drying container 3 ... Microwave oscillator 6 ... Corrugated metal plate 7 ... Bottom plate 9 ... Side plate 11 ... Telescopic rod 12 ... Driving means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K090 AA01 AA02 AB07 BA01 DA19 EB27 3L113 AA01 AB07 AC12 AC53 AC67 AC83 BA01 CB07 CB24 CB39 DA10 DA11 4F201 AJ02 AJ03 AJ08 AK08 BA04 BC02 BN10 BN27

Claims (2)

[Claims] 1. A microwave oscillating device disposed on an upper portion of a drying container, a corrugated metal plate disposed on a bottom wall and a side wall of the drying container, and a synthesis device disposed inside the corrugated metal plate. A microwave drying device comprising a resin bottom plate and side plates. 2. The microwave drying apparatus according to claim 1, wherein the bottom plate and the side plates are connected to driving means fixed to a drying container via telescopic rods.