JPS5925916Y2 - Dewatering blade for paper machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blade for a dewatering device used in a hydrofoil or vacuum foil type paper machine.

In recent years, ceramics, especially sintered alumina ceramics, have been increasingly used as blades for dewatering equipment because of their excellent performance and long lifespan.

Since it is impossible to manufacture long ceramic blades, the structure is such that segments 1 of about 400 mm are lined up and joined on a plate base, as shown in FIG.

To fix the segment 1 on the blade base 2, bolts 3 and tightening members 4 are used.

The total length of the blade is about 2 m to 8 m. If there is a step at the seam of the segments 1, the screen will be damaged and the resulting paper will not be homogeneous.

Therefore, it is necessary to eliminate the level difference, but since the structure is as described above, there is always a level difference during assembly, making this polishing work difficult.

Further, the angle θ1 of the blade shown in FIG. 1 is usually l~4°.
, and ^ is approximately 55°, but this must be changed depending on the type of paper being manufactured.

As this requires step polishing work each time the ceramic blade is replaced, a ceramic surface material 5 as shown in FIG. A recess 7 that fits into the rail is provided to facilitate blade replacement and eliminate the need for step polishing each time the blade is replaced.

In this type of blade, a steel material 8 is embedded as an auxiliary reinforcing material to withstand deflection.

Further, a dovetail-shaped convex portion 9 is provided on the lower surface of the surface material 5 to ensure that the base 6 and the surface material 5 are held together.

By the way, there is a limit to the height of the entire blade, and the thickness of the surface material 5 cannot be made that thin, so the width of the reinforcing material 1
However, there are also limitations, especially in the case of long objects, which have the drawback of not being strong enough to withstand sufficient deflection.

The present invention was devised to eliminate such drawbacks, and aims to provide a blade with less deflection by sufficiently increasing the width of the reinforcing material.

The invention consists of a surface part 5 made of ceramic material, a base part 6 made of plastic material and provided with a recess 7 on the underside which fits into the support rail, the surface part having grooves 10 embedded in the base plastic on the underside. has a protrusion 9 having a
T-shaped reinforcing material 11 so that the head fits into the groove 10
This is a dewatering blade for paper machines that is embedded in the base plastic.

FIG. 3 shows an embodiment of the present invention.

5 is the surface portion of sintered alumina, and the leading edge 12 has an acute lead angle.
, a flat surface 13 and an inclined surface 14 following the flat surface 13 .

The flat surface 13 supports the screen, and when the screen moves, the vacuum produced in cooperation with the inclined surface 14 sucks and dehydrates the pulp slurry.

A bee-shaped protrusion 9 is formed on the lower surface of the surface portion 5, and this protrusion is provided with a groove 10.

6 is a base made of epoxy resin.

A T-shaped reinforcing steel member 11 is embedded in this base portion 6 so that its head is inserted into the groove 10.

Since T-shaped reinforcing steel materials are not commercially available, two L-shaped reinforcing steel materials are used back to back as shown in the figure.

By making the reinforcing material T-shaped, resin flows better than when using a U-shaped reinforcing material, and the strength is also improved.

In addition, this type of dewatering blade is manufactured by placing the surface portion 5 at the bottom of the mold with the lower surface facing up and injecting liquid resin onto the cellar l-L and curing it, but using a T-shaped reinforcing material. This is advantageous because the reinforcing material does not fall down when it is set in the mold.

The paper machine blade of the present invention described above has a groove 10 in the convex portion 9 on the lower surface of the surface portion 5, and a T-shaped reinforcing member 1 in the groove 10.
Since the head of the reinforcing material 11 can be inserted therein, the width of the reinforcing material 11 can be made sufficiently large, and even a long object can withstand deflection.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional example, and FIG. 3 is a sectional view showing an embodiment of the present invention. Explanation of symbols, 5...Surface portion, 6...Base, 7...Concave portion, 9...Protrusion portion, 10
...Groove, 11...Reinforcement material.

Claims (1)

[Scope of utility model registration request] The surface part is made of a ceramic material, and the base part is made of a plastic material and has a recess on the lower surface that fits into the support rail. A dewatering blade for a paper machine having a T-shaped reinforcing member embedded in a plastic base so that the head fits into the groove.