JPH028742Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for treating municipal waste, and particularly to an apparatus for processing waste plastic materials in municipal waste.

[Prior art and its problems] As shown in Figure 4, the plastic solidifying machine
A casing part is constructed by integrally connecting a large-diameter cylindrical casing 1 and a small-diameter cylindrical nozzle 7 with a cone part 6, and also connects a screw shaft 2 in the casing 1 and a gas vent rod 4 in the nozzle 7. Cone part 6
The tapered portion 3 connects them together to form a screw portion.

Screw blades 8 are formed in series on the outer periphery of the screw portion from the screw shaft 2 through the taper portion 3 to the root portion of the degassing rod 4.

The rear part of the screw shaft 2 is rotatably supported by a bearing 10, and is connected to a geared motor 13 via sprockets 11a, 11b and a chain 12, and the rotation of the motor 13 drives the input screw provided at the rear of the casing 1. The waste plastic material inputted from the port 14 is sent forward by the screw blade 8, melted and kneaded in the melting/kneading part 15 (cone part 6, taper part 3), and extruded from the nozzle 7 as a solidified columnar material. It's getting old.

16 is a heater, and 17 is a heater control device.

However, in the conventional solidification machine, the casing 1
The inner surfaces of the cone portion 6 and nozzle portion 7 and the surfaces of the tapered portion 3 of the screw shaft 2 and the gas venting rod 4 have the disadvantage that they are susceptible to wear because the plastic material is crushed and melted under high temperature and pressure.

[Purpose of the invention] The present invention was made to eliminate the above-mentioned problems, and by providing a bead of overlay using wear-resistant welding material in areas that are prone to wear, wear-resistant plastic solidifying machine tips can be reduced. The purpose is to provide a prevention device.

[Structure of the invention] The abrasion prevention device for the tip of the plastic solidifying machine of the present invention separates the plastic material from other crushed materials after crushing it with the municipal garbage crushing device, and then uses the separated plastic material in a cylindrical shape to The part is equipped with a motor-driven screw in a casing having a nozzle of a predetermined length with a reduced inner diameter via a cone part, and the plastic material is supplied to a screw-type solidification device that melts and solidifies the plastic material by the rotational force of the screw. In the plastic solidifying machine that obtains rod-shaped plastic material from the screw type solidifying machine, on the inner surface of the cone part and the nozzle part of this plastic solidifying machine, and on the surface of the screw part located between the cone part and the nozzle part. The casing is characterized by several beads made of wear-resistant welding material provided approximately in the axial direction of the casing.

[Embodiment] FIG. 1 is an enlarged view of the tip part showing one embodiment of the present invention. The same parts as in FIG. 4 are labeled with the same numbers.

Screw shaft 2 located inside casing 1
A plurality of build-up beads 5a of a predetermined height made of wear-resistant welding material are provided in the axial direction of the cylinder on the surfaces of the taper portion 3 and the gas vent rod 4 at the tip thereof. This beat 5 may have a spiral shape with a large lead.
Similarly, on the inner surfaces of the cone portion 6 of the casing 1 and the nozzle 7, several build-up beads 5b made of wear-resistant welding material are provided in the axial direction of the cylinder. Fig. 2 shows an overlay bead 5 provided on the inner surface of the casing 1.
3 shows the pattern of the overlay bead 5b when viewed from the direction of arrow P in FIG. 2.

Reference numeral 8 denotes a screw blade provided spirally on the screw shaft 2. In this way, welding bead 5
a and 5b, when the screw shaft 2 rotates and the molten material moves toward the nozzle 7, the built-up bead 5b on the inner surface of the casing 1 can smoothly guide the molten material in the axial direction. Also, since the build-up bead 5a provided on the surface of the screw shaft 2 reduces the contact between the surface of the screw shaft 2 and the molten material, wear on the surface where the build-up beads 5a and 5b are provided is reduced. .

[Effects of the invention] As described above, the present invention melts the crushed material by providing a wear-resistant build-up bead at the location where crushing and melting is performed under high temperature and high pressure. In addition, since contact between the surface of the screw shaft and the molten material is reduced, wear on the inner surface of the casing and the surface of the screw shaft is reduced, and the service life can be extended.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of the tip part showing one embodiment of the present invention, FIG. 2 is a cross-sectional view of only the casing in FIG. 1, and FIG. 3 is a side view seen from the direction of arrow P in FIG. FIG. 4 is a partial sectional view showing a conventional example. 1...Casing, 2...Screw shaft, 3...
...Tapered part, 4...Gas release rod, 5a, 5b...
Overlay bead, 6... Cone part, 7... Nozzle, 8
...screw feather.

Claims (1)

[Scope of utility model registration request] After the municipal waste is crushed by a crushing device, the plastic material is separated from other crushed materials, and the separated plastic material is shaped into a cylindrical shape, the tip of which is passed through a nozzle of a predetermined length with a reduced inner diameter through a cone. A plastic solidification machine which is provided with a motor-driven screw in a casing, and supplies the plastic material to a screw type solidification device which melts and solidifies the plastic material by the rotational force of the screw, and obtains rod-shaped plastic material from the screw type solidification device. , several overlay beads made of wear-resistant welding material are formed approximately in the axial direction of the casing on the inner surfaces of the cone section and nozzle section of the plastic solidifying machine, and on the surfaces of the screw section located between the cone section and the nozzle section. A wear prevention device for the tip of a plastic solidifying machine, characterized by having the following features: