JPS6115816B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a coating roller brush, and an object of the present invention is to manufacture coating roller brushes of stable quality in large quantities at low cost.

Traditionally, painting roller brushes have been made by wrapping synthetic fiber pile fabrics, pile knitting fabrics, etc. around the outer circumferential surface of a core with a circular cross section. Plastic, hardened paper tubes, etc., as well as those made of real material, are used to obtain the tube. Among these, hardened paper tubes are the most commonly used because they are easy to manufacture and inexpensive, but they are made of coated paper or kraft paper impregnated with a thermosetting resin such as phenol resin. A paper tube is formed by winding several pieces of paper into a spiral shape and adhering them to each other. After cutting this into a specified size, the resin is heated at a temperature of about 150°C for 40 to 50 minutes in the case of phenolic resin. It is hardened. After a pile fabric is wound and adhered to the outer circumferential surface of this hardened paper tube of a predetermined length, drying, shearing, etc. are performed to produce a roller brush for painting. However, as mentioned above, in the conventional manufacturing method, after forming a paper tube, it is heated to form a hardened paper tube, and then the pile fabric is wrapped around the hardened paper tube. The fabric wrapping process is separated by a heating process, which makes it inefficient as continuous work cannot be done, and the length of the paper tube is limited by the heating furnace, making it difficult to wrap the pile fabric around a short hardened paper tube. There is a problem that the workability is even worse because it has to be done.

Therefore, when forming a paper tube, it is preferable to simultaneously wrap a pile fabric, cut it to an appropriate length, and then heat it to harden the paper tube to manufacture a roller brush for painting. However, in this method, a heating temperature of at least 140°C is required to heat cure the resin impregnated into paper, and at this temperature the pile fabric made of synthetic fibers is damaged by the heat and cannot be used for painting. There was a problem that it could not be applied to a roller brush, and it was impossible to implement it.

The present invention solves the above-mentioned problems by heating a paper tube wrapped with pile fabric from its inner peripheral surface, and provides a continuous and highly efficient method for manufacturing a coating roller brush. . Preferred embodiments will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a cylindrical mandrel, one end of which is fixed to a base 2 and extends in the horizontal direction, and the other end located forward in the feeding direction of the paper tube is a free end. 3 is a first drum placed on the side of the mandrel, 4 is a second drum,
Paper tubes 5 and 6 impregnated with a thermosetting resin such as phenol are fed to the mandrel 1 from these drums 3 and 4, respectively. Between the first drum 3 and the mandrel 1 is a coating device 7 for applying paraffin, soap, etc.
However, an adhesive applicator 8 is also provided between the second drum 4 and the mandrel 1. A first paper strip 5 is fed from the first drum 3 and is spirally wound around the mandrel 1. At this time, the paper strip 5 passes through the coating device 7 and is wound around the back side of the mandrel 1. At this time, paraffin, soap, etc. are applied to the surface in contact with the outer circumferential surface of the mandrel, and as a result, the friction between the outer circumferential surface of the mandrel 1 and the back surface of the paper strip 5 is reduced. In addition, the second paper strip 6 fed from the second drum 4 to the mandrel 1 passes through an adhesive applicator 8 to coat the back side with adhesive, and the second paper strip 6 is fed from the second drum 4 to the mandrel 1. It is wound spirally onto the band 5 and adhered.

Reference numerals 9 and 10 indicate rotating drums with a mandrel interposed therebetween, and either of the rotating drums is provided with a driving source. two rotating drums 9,
The line connecting the central axes of the mandrels 10 is arranged slightly offset from the direction orthogonal to the mandrel 1, and an annular belt 11 is stretched between the lines, and this belt 11 is wound around the mandrel 1 to form a belt. The paper tube 12 is wound one turn around the paper tube 12.

Now, when any of the rotary drums is rotated by the drive source, the belt 11 is driven, and the belt 11 is also rotated.
is wound around the mandrel 1 and wound around the already formed paper tube 12, thereby causing the paper tube 12 to slide over the mandrel 1 and rotate. At this time, since the belt 11 is wound in a direction shifted from the direction perpendicular to the mandrel 1 as described above,
The paper tube 12 is sent out in front of the mandrel 1 while rotating. In this case, the back surface of the first paper strip 5 that contacts the mandrel 1 is coated with paraffin, soap, etc. in advance as described above, so that it is smoothly rotated and sent out. As a result, each of the paper bands 5 and 6 connected to the paper tube is further wound around the mandrel 1 to sequentially form a new paper tube.

13 is the third layer around which the belt-shaped pile fabric 14 is wrapped.
The pile fabric 14 is attached to this drum 13.
The paper is then sent to the mandrel 1 via the adhesive applicator 15, and is continuously wound and adhered to the surface of the paper tube 12, which is sent forward while rotating on the surface of the mandrel 1.

As described above, the roller brush material 16 with the pile fabric 14 wrapped around the surface of the paper tube 12 is continuously produced, and then it is cut into a predetermined size. An example of the cutting device 20 is shown in FIG. 2, which includes a plurality of cutters 22 provided at predetermined intervals on a pedestal 21, and
It has a lifting mechanism for these cutters 22, and this frame 2
The roller brush material 16 is provided with a feeding mechanism in the sending direction of the roller brush material 16, a return mechanism to the original position, and a detection mechanism for the end of the roller brush material 16. FIG. 2 shows a state in which the cutting device 20 has returned to its original position after cutting has been completed, and in this case, the cut end surface of the roller brush material 16 is at position a. The roller brush material 16 is continuously formed and sent out from this position, and when the cut end surface reaches the position b, the end surface is detected by using a photoelectric element or the like, and this detection signal is used to move the mount 21 to the roller brush material 16. The material 16 is fed in the same direction at the same speed as the feed speed, and the cutter 22 is lowered to start cutting. At this time, it is desirable to start cutting sequentially from the cutter closest to the cut end surface of the roller brush material 16, and to finish cutting in that order. When cutting is completed by lowering the cutter 22 a predetermined distance, the cutter 22 is raised and then the cutting device is returned to its original position. Thereafter, this operation is repeated one after another to cut the continuously fed roller brush material 16 to form a roller brush material 16 of a predetermined length.

Next, the roller brush material formed to a predetermined length is heated to harden the resin such as phenol with which the paper tube 12 is impregnated.The method will be explained together with the apparatus. In FIG. 3, 30 is a heating device, which has an air supply chamber 31 disposed below.
This air supply chamber 31 has an air supply hole 32 for guiding hot air sent from a hot air generator (not shown) into the air supply chamber.
is provided. Further, a plurality of air outlets 34 are provided on the upper plate 33 forming the upper surface of the air supply chamber 31, and the hot air guided to the air supply chamber 31 is blown out from these air outlets 34. Reference numeral 40 denotes a hot air guiding device, which includes a substrate 41 attached to the peripheral edge of the air outlet 34, and a support 42 hanging vertically from the substrate 41.
The base plate 41 is made up of a support 42 and a fin 43 spirally wound around the outer periphery of the support 42, and a plurality of through holes 44 are provided in the substrate 41. This hot air guide device 40 is connected to the upper plate 33 of the air supply chamber 31.
The board 41 is attached to the position of the air outlet 34.
It is also possible to simply form the substrate 41 in a larger size than the air outlet 34 and place it there, or as shown in FIG.
The fitting portion 35 may be formed in a shape corresponding to the shape of the fitting portion 35, and the substrate 41 may be attached by fitting the fitting portion 35 into this portion.

A roller brush material 16 formed to a predetermined length is inserted into the outer periphery of a plurality of hot air guiding devices 40 arranged so as to cover a plurality of air outlets 34 provided on an upper plate 33 with respective substrates 41. A predetermined number of each layer is stacked. Reference numeral 45 denotes a presser ring, which is inserted into the upper outer periphery of the hot air guide 40 so as to further overlap the upper part of the stacked roller brush materials 16, and presses the roller brush materials 16 with its own weight.
Adjacent ends of the roller brush material 16 are brought into close contact with each other.

Reference numeral 36 denotes an exhaust chamber, which is provided above the hot air guide 40 into which the roller brush material 16 is inserted, facing the air supply chamber 31. A bottom plate 37 forming the lower surface of the exhaust chamber 36 has air outlet ports 34 of the air supply chamber 31.
A discharge port 38 is provided at a position corresponding to the
A presser ring 45 inserted into the upper part of the hot air guide 40 is inserted into the discharge port 38 to guide the hot air that has passed through the inside of the paper tube 12 in the roller brush material 16 to the exhaust chamber 36. Exhaust chamber 36
The hot air guided to the exhaust hole 39 is discharged through the exhaust hole 39 by an exhaust fan (not shown).

Now, when the hot air sent out by the hot air generator is guided to the air supply chamber 31 via the air supply hole 32, it passes through the through hole 44 provided in the base plate 41 of the hot air guide device 40 from each air outlet 34. Then, the roller brush material 16 is sent out. The hot air sent inward of the roller brush material 16 moves upward in the figure, but at that time, the support 42 of the hot air guide device 40
The paper tube 12 of the roller brush material 16 is heated from the inside while spirally rotating inside the laminated roller brush material 16 guided by the fins 43 that are spirally wound around the roller brush material 16. do. The hot air that has passed inside the roller brush material 16 is guided to the exhaust chamber 36 from the exhaust port 38 through the inside of the presser ring 45, and is discharged from the exhaust hole 39 by the exhaust fan. The discharged hot air is desirably sent to a hot air generator using a purifying device or a circulation fan (not shown), heated again, and then used.

As described above, the paper tube 12 of the roller brush material 16
is heated from inside by the swirling air current, so
It is heated evenly over the entire circumference and length of the paper tube,
The curing of the impregnated resin also progresses uniformly. Moreover, since the paper tube 12 is heated from the inside, the pile fabric wrapped around the surface thereof is not affected in any way.

Another embodiment of the hot air guiding device 40 is shown in FIG. 5, and it consists of a branch punch 42 vertically disposed on a base plate 41 and fins 43 spirally wound around the branch punch 42.
In this case, the branch punch 42 is formed hollow, with its upper end closed, and its lower end inserted into and joined to a hole 46 provided in the base plate 41, so that the hollow part communicates with the outside. The inner end 47 of the fin 43 that is spirally wound around the spindle 42 is not in close contact with the outer peripheral surface of the spindle 42, but has a certain gap, and the fin 43 is attached to the spindle 42 at its upper end. , continuously joined at the lower end or other suitable location. A plurality of spout ports 48 are provided in a portion of the outer periphery of the spindle 42 facing the inner end of the fin, and as a result, the spout ports 48 are arranged in a spiral around the outer periphery of the spindle 42 .
Such a hot air guide device 40 connects the substrate 41 to the air supply chamber 3.
It can be attached to the air outlet 34 portion of the upper plate 33 of 1 and used in the same manner as in the above embodiment, but in this case,
The hot air is fed inward from the opening at the lower end of the branch punch 42, sent to the inside of the paper tube 12 of the roller brush material 16 from the jet nozzle 48, and then spiraled inside the paper tube 12. Heat to harden the resin. In the case of the above embodiment, the hot air is sent upward while heating the paper tube 12 sent out from the through hole provided in the substrate 41, so the heating temperature is sufficiently high in the lower part near the substrate 41, but the heating temperature is high enough in the upper part near the substrate 41. There is a possibility that the heating temperature decreases as it moves and the heating temperature becomes uneven, but in the case of this example, the hot air is
Since the heating temperature is blown out from the jetting port 48 at a uniform temperature at any position in the height direction of the heating device 2, the heating temperature becomes more uniform.

In order to heat roller brush materials 16 of various sizes and laminated numbers, it is convenient to form at least one of the air supply chamber 31 and the exhaust chamber 36 so as to be movable in the vertical direction.

As described above, the paper tube 1 of the roller brush material 16 is
2 is cured, but processing such as shearing is performed before or after this heating step.

In this way, the present invention involves spirally winding a paper strip impregnated with a curable resin to form a paper tube, wrapping and bonding a pile fabric made of synthetic fiber around the outer circumferential surface of the paper tube, and then heating it from the inside of the paper tube. This method has various characteristics because it is a method of manufacturing a coating roller brush by thermosetting resin impregnated into a paper strip. The most significant feature is that the process of forming the paper tube and the process of wrapping the pile fabric are not separated.
This means that continuous work can be done, which makes it possible to provide roller brushes that are extremely efficient and therefore inexpensive.Also, since the heating is done evenly, the hardened state of the paper tube remains constant, resulting in rollers of stable quality. Brush can be provided. Furthermore, since the pile fabric is continuously wrapped around paper tubes that are formed continuously, wasteful parts are generated at the beginning and end of each roller brush, unlike when wrapping around a short paper tube. There is no
It is possible to save significantly on pile fabric.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the manufacturing process of roller brush material, FIG. 2 is a perspective view showing an embodiment of the cutting device,
Fig. 3 is a partially cutaway perspective view showing an embodiment of the heating device, Fig. 4 is a sectional view of the main part of the hot air guide, and Fig. 5 is a cross section of the main part showing another embodiment of the hot air guide. It is a diagram. 12...Paper tube, 14...Pile fabric.

Claims (1)

[Claims] 1 A paper tube 12 is formed by winding paper impregnated with a thermosetting resin, and after wrapping and adhering a pile fabric 14 made of synthetic fiber around the outer circumferential surface of the paper tube 12, the paper tube 12 is heated from inside to form a paper tube. A method for manufacturing a roller brush for painting, characterized by thermosetting an impregnated resin.