JPH0126789Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flight used in a heat treatment apparatus for thermoforming mineral fiber mat containing an uncured binder.

[Prior art] Mineral fiber mat (hereinafter sometimes referred to as "raw wool"), which is made by spraying thermosetting resin onto mineral fibers such as glass fiber, rock wool, and slag wool, is heated and formed to a certain thickness. As a heat treatment device for the purpose of They are arranged facing each other, and the raw wool is moved while being sandwiched between the upper and lower endless track devices, and hot air of, for example, about 180 to 250 degrees Celsius is sent through the holes in the flights to the sandwiched raw wool to remove the resin. Apparatus for curing and molding to a predetermined thickness is known (for example, Japanese Patent Publication No. 39-1999).
29931).

The flights used in this heat treatment equipment for forming mineral fiber pine consist of a top plate with many ventilation holes that come into contact with the raw wool, and rib-shaped legs to increase the rigidity and strength of this top plate. It has The top plate is usually a long plate with a width of about 150 to 250 mm, a diameter of 4 to 6 mm, and a pitch of 7.
There are many ventilation holes of about 10mm in diameter.

Since this top plate is in the form of a long plate, the flights are also long members in one direction, and a large number of flights are connected so that the long sides of each top plate butt against each other to form an endless connected body. Note that a gap is provided between the top plates to the extent that running (rotation) of the endless coupling body is not hindered.

Conventionally, there are two types of flights: those made of steel plate and those made of cast iron. Those made of steel plate have the top plate and legs made separately and then assembled by welding them together, and those made of cast iron have the top plate and legs cast as one piece. .

[Problems to be solved by the invention] The following problems occurred in the above-mentioned conventional flight.

In the case of flights made of steel plates, the linear accuracy or planar accuracy of the flight edges is poor, and steps are likely to occur between adjacent flights.

That is, in a flight made of a steel plate, the top plate is thin and cannot be machined such as polishing or grinding, and it is difficult to perform machining to improve the linear accuracy and planar accuracy of the edge portion.

If the straightness and flatness of the flight edge portion are poor as described above, a relatively large push mark (flight mark) will be produced on the inorganic fiber mat against which the flight is pressed, impairing the product quality (particularly the appearance quality). Particularly, among flight marks, marks caused by differences in flights tend to spoil the appearance. In addition, especially when manufacturing high-density mats, the raw wool is strongly compressed, so such problems tend to become apparent.

Note that machining is possible if the top plate is made thicker, but in this case, the ventilation holes provided in the top plate are deep, and the ventilation holes are likely to become clogged. Normally, heat treatment equipment for forming mineral fiber pine is used by circulating hot air for heating, so binder mist and small pieces of fiber are entrained in this hot air, and these tend to clog the ventilation holes of the flights. . If the air holes in the flight become clogged, the raw wool will not be heated evenly.

For cast iron flights, although the straightness and flatness of the flight edges can be improved by machining, the top plate must be made thicker due to lower strength and toughness than steel, and restrictions on casting molds. do not have. Therefore, the depth of the vent hole becomes large relative to the hole diameter, making the vent hole more likely to become clogged as described above.

[Means for solving the problem] The present invention provides a pair of side plates along the long side of the top plate, and a long groove is provided at the inner edge corner of the long side of the side plate. The sides are fitted into the long grooves so that the top plate and the legs are integrated.

[Function] In the flight of the present invention, the edge portion of the flight becomes the side end surface of the leg, so it can be machined to ensure straightness and flatness. This prevents pressure marks from forming on the mat product and makes it possible to mold a high-quality fiber mat with excellent quality.

Further, since the top plate is attached to the side plate by inserting it, manufacturing is easy, and the top plate can be taken out and repaired.

Furthermore, since the top plate can be made of a steel plate, it is also possible to reduce the thickness of the top plate to prevent clogging of the ventilation holes.

[Example] Examples will be described below with reference to the drawings.

Fig. 1 is a plan view of a flight according to an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a sectional view taken along the line - Fig. 2, and Figs. 4 and 5 are respectively the same as Fig. 3. It is an enlarged view of the main part.

1 is a top plate having a large number of ventilation holes 1h (not shown in FIGS. 1 to 4), and its long side 1
Side plates 2 and 3 extend along a and 1b.
As shown in FIG. 3, the side plates 2 and 3 are engaged with the top plate 1 so as to narrow toward the bottom in the figure. Furthermore, reinforcing plates 4 are provided perpendicularly to the top plate 1 and the side plates 2 and 3 at predetermined intervals, thereby increasing the strength or rigidity of the entire flight.

This reinforcing plate 4 is smaller in height than the side plates 2 and 3, and the upper side 4c of the reinforcing plate 4 is the upper side 2 of the side plates 2 and 3.
It is located below c and 3c.

A central reinforcing member 5 in the form of an elongated plate is spanned above the central portion of the upper side of each reinforcing plate 4, and is fixed to each reinforcing plate 4 by welding or the like to form an integral unit.

The upper side 5c of the central reinforcing member 5 is in contact with the lower surface side of the top plate 1, and prevents the top plate 1 from being bent. Also, the fifth
As shown in the figure, the top plate 1 and the central reinforcing member 5 are welded together using a hole 1h provided in the top plate 1. 5a shows this weld metal.

Note that holes 2h and 3 are provided in the side plates 2 and 3 and the reinforcing plate 4.
h, 4h are bored, and it is configured to suppress the weight increase of the flight.

As shown in FIG. 4, long grooves 6 are provided in the inner edge corners of the upper sides of the side plates 2 and 3, and the long sides 1a and 1b of the top plate 1 are fitted into the long grooves 6. , whereby the top plate 1 and side plates 2 and 3 are connected. Furthermore, in this embodiment, spot welding is performed at predetermined intervals, and the top plate 1, side plate 2,
It enhances the compatibility with 3. Top plate 1 and side plates 2 and 3
This may be spot welded if desired. This spot welding does not cause thermal distortion because the amount of welding is small.

The long groove 6 is narrowed from the edge corner, and the inner edge of the long groove 6 is chamfered in the horizontal direction in the figure to form a flat seat-like portion 7. The lower surface side of the top plate 1 is supported by this flat seat-shaped portion 7. As shown in the figure, both sides of the top plate 1 are cut diagonally so that the lower side protrudes, and the top plate 1 is inserted into the long groove 6 so as not to slip out.

It is preferable that the flat portion 7 is provided so that the upper surface 1c of the top plate 1 placed thereon is flush with the upper surfaces 2c and 3c of the side plates 2 and 3. However, in reality, it is not easy to process these so that they are completely flush, so the top surface 1c of the top plate 1 is made to protrude slightly beyond the top surfaces 2c and 3c of the sides 2 and 3. At the same time, the side edges of the top plate upper surface 1c may be slightly shaved off so that the side upper surfaces 2c and 3c are gently connected to the top plate upper surface 1c.

Reference numeral 8 in the figure denotes a bracket that protrudes in the longitudinal direction of the flight, and a roller (not shown) that engages with a guide member such as a guide rail is attached to the lower surface of the tip of the bracket.
A chain or the like for pulling and moving the flight is connected to the aircraft.

In this embodiment, the top plate 1 and side plates 2 and 3 are made of steel plates. In order to prevent the ventilation holes from clogging, the top plate 1 is preferably made as thin as possible while maintaining the strength and rigidity of the top plate. Preferably.

The diameter and pitch of the ventilation holes in the top plate are not particularly limited, and may be set within a range that allows flight marks to be transferred to the inorganic fiber mat.

The side plates 2 and 3 are not particularly limited as long as the strength and rigidity of the entire flight can be ensured, but as shown in the figure, only the upper side, that is, the portion along the side that contacts the top plate 1 may be thick. In this way, the long grooves 6 can be formed deeply and the overall weight can be reduced.

To manufacture the flight of this example, for example,
First, the side plates 2 and 3 and the reinforcing plate 4 are assembled by welding or the like to create a boat-shaped frame, and then the central reinforcing member 5 is attached by welding. Next, the whole is annealed to remove distortion. Then, a groove 6 is bored, the top plate 1 is fitted, and spot welding is performed as desired to connect the top plate 1 and the side plates 2, 3 or the central reinforcing member 5.
to join. Thereafter, machining such as cutting and polishing is performed to improve the straightness, flatness, etc. of the flight edge portion. Through this machining, for example, the flatness of the top surface can be improved by ±0.1 mm, and the linearity of the side surfaces can be improved by ±0.1 mm.
It is possible to make it 0.05mm.

[Effect] As detailed above, the flight of the present invention has a long groove in the inner edge corner of the side plate, and the long side of the top plate is inserted into this edge corner to be assembled. The edge portion can be sufficiently machined to improve the flatness and linearity of the edge portion. As a result, flight marks generated on the surface of the inorganic fiber mat can be eliminated or reduced, and the appearance quality of the mat can be improved.

Further, in the flight of the present invention, since the top plate is inserted into the long groove, manufacturing is easy, and the top plate can be removed and repaired. Further, when welding the top plate and the side plates, the amount of welding required is small, since the welding required is about spot welding.

Further, in the flight of the present invention, since the top plate can be made of a thin steel plate, it is possible to reduce the depth of the vent hole relative to the diameter of the vent hole, thereby suppressing clogging of the vent hole.

[Brief explanation of drawings]

Fig. 1 is a plan view of a flight according to an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a cross-sectional view taken along the line - Fig. 2, and Figs.
It is an enlarged view of the main part of the figure. 1... Top plate, 2, 3... Side plate, 4... Reinforcement plate,
5...Central reinforcing member, 6...Long groove.

Claims (1)

[Scope of utility model registration request] In a flight equipped with a top plate and legs, the legs have a pair of side plates extending along the long sides of the top plate, and long grooves are formed in the inner edge corners of the long sides of the both sides. 1. A flight of a heat treatment apparatus for forming mineral fiber pine, characterized in that the legs and the top plate are integrated by fitting the long sides of the top plate into the long grooves.