JPH02268928A - Forming roll for air filter with unequal pitch - Google Patents

Abstract

PURPOSE:To work an air filter at a fixed speed and in an unequal pitch by using a forming roll wherein teeth provided on the outer circumference are equal in tooth height and unequal in pitch and a pair of teeth can engage with each other. CONSTITUTION:The tooth form 1 provided on the outer circumference of the forming roll 3 is made up to be symmetric with respect to the teeth form and the tooth groove 2 provided on the outer circumference is made up to be symmetric with respect to the tooth groove. In both rolls the tooth height is equalized and the pitch is made unequal. When the forming rolls 3, 4 are engaged with each other and driven by a driving motor 7, the forming rolls 3, 4 creases a material 5 to be worked, a pitch reducing device 8 reduces the pitch and a cutting device 9 cuts the material to a desired length. Since the air filter of unequal pitch can be formed at fixed speed of rotation, at a fixed feed speed to the material to be worked, the productivity is improved and the forming system can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a forming roll that is applied to forming uneven pitch air filters or forming full gate fins for uneven pitch heat exchangers.

[Conventional technology]

An example of conventional air filter molding technology is shown in FIGS. 6 and 7.

In these figures, a pair of forming rolls 15 are each configured to have protrusions 12 and grooves 13 at equal intervals on the outer peripheral surface of the cylindrical roll.

Then, the forming roll 15.15 is rotated at a constant speed, and the seventh
As shown in the figure, the workpiece 14 is fed into rolls to create creases at equal intervals.

When manufacturing air filters with unequal pitches, the pitches are made larger or smaller by increasing or decreasing the feeding speed of the workpiece 14.

Note that 16 is a chain or belt for transmitting power from the drive motor to the roll 15.

[Problem to be solved by the invention]

However, in the conventional molding method as described above, when molding an air filter with uneven pitches, the feed speed of the workpiece must be slowed down in the narrow pitch portions, resulting in a decrease in efficiency. In addition, a mechanism for adjusting the relationship between the feeding speed of the workpiece and the rotational speed of the forming roll is required, which is likely to increase costs.

The present invention aims to provide a new forming roll for an unequal pitch air filter that solves the above-mentioned problems.

[Means to solve the problem]

For this reason, the forming roll for an unequal pitch air filter of the present invention is a forming roll for an unequal pitch air filter that creases the fed workpiece by a pair of opposing forming rolls. The teeth provided on the outer periphery of the forming roll are characterized by the following features: the tooth heights are equal, the pitches are unequal, and a pair of teeth can mesh with each other.

[Effect]

The above-mentioned forming roll for an unequal pitch air filter of the present invention has a forming roll shape corresponding to the pattern of the unequal pitch air filter shown in FIG. 3 (the shape shown in FIGS. 1 and 2). As shown in FIG. 4, the forming rolls 3 and 4 configured as shown in FIG. Rotate to create creases in the workpiece 5.

In this case, the forming roll 3 has a symmetrical tooth profile, and the other forming roll 4 has a symmetrical tooth groove, so that both rolls are shaped to mesh with each other.

If the molding process is carried out while keeping the roll rotation speed and workpiece feeding speed constant, the desired uneven pitch air filter can be manufactured with high efficiency.

〔Example〕

One embodiment of the present invention will be described below with reference to the drawings.
Figures 1 and 2 are shape diagrams of the forming roll of the present invention, Figure 3 is a pattern diagram of one pattern of an air filter, Figure 4 is an overall schematic side view of the molding system of the present invention, and Figure 5. is an enlarged view of the tooth profile of the forming roll of the present invention.

In these figures, the tooth profile 1 provided on the outer periphery of a forming roll 3 is configured symmetrically, and the tooth groove 2 provided on the outer periphery of another forming roll 4 is configured symmetrically. Both are shaped to mesh with each other.

The tooth heights of each roll are made equal, and the pitches are made unequal. The number of teeth of the forming roll is an integral multiple of the number of ridges included in one pattern of the air filter to be formed.

1st. In the case of the embodiment shown in FIG. 2, the number is doubled.

The details of the tooth tips and tooth bottoms of the forming roll are shown in Fig. 5.Protrusions 10 are provided on the tooth tips and structures 11 are provided on the tooth bottoms, which are useful for strengthening the creases in the workpiece during machining. let

The two forming rolls 3 and 4 constructed in this way are assembled and engaged as shown in FIG. 4, and are driven by a drive motor 7 via a chain or belt 6.

The workpiece 5 is pushed between the forming rolls, and the forming rolls 3
, 4 are creased and bent to a pressure angle close to that of the rolls.

Furthermore, the pitch is reduced by a pitch filling device 8, and cut into a desired length by a cutting device 9, and the unequal pitch air filter is formed at a very high speed under a constant roll rotation speed and a constant workpiece feed rate. .

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the technical idea of the present invention.

〔Effect of the invention〕

As described above, by using the forming roll of the present invention, an unequal pinch air filter can be formed with a constant roll rotation speed and a constant workpiece feed rate, making it possible to increase the forming speed and improve productivity. In addition to being significantly improved, the overall forming system can be extremely simplified, and there is no need for a mechanism for adjusting the relationship between the feeding speed of the workpiece and the rotational speed of the forming roll, as in the prior art, and costs can be reduced.

[Brief explanation of drawings]

Figures 1 and 2 are shape diagrams of one embodiment of the forming roll of the present invention, Figure 3 is a pattern diagram of one pattern of an air filter, and Figure 4 is an overall schematic side view of the molding system according to the present invention. , FIG. 5 shows an enlarged view of the tooth profile of the forming roll of the present invention. FIG. 6 is a conventional forming roll, and FIG. 7 is a schematic diagram of a conventional forming system. DESCRIPTION OF SYMBOLS 1... Tooth profile, 2... Tooth groove, 3... Forming roll, 4... Forming roll, 5... Workpiece material,
6... Belt or chain, 7... Drive motor, 8... Pitch filling device, 9... Cutting device, 10... Tooth tip protrusion, 11... Tooth bottom groove. 85 fig.'7 yen

Claims (1)

[Claims] (1) In a forming roll for an unequal pitch air filter that creases the fed workpiece using a pair of opposing forming rolls, the tooth height of each tooth provided on the outer periphery of each of the forming rolls. 1. A forming roll for an unequal-pitch air filter, characterized in that a pair of rolls are formed at equal pitches, at unequal pitches, and capable of interlocking with each other.