JP3286997B2 - Manufacturing method of magnet roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnet roll capable of continuously manufacturing a magnet roll having a resin magnet on a shaft surface.

[0002]

2. Description of the Related Art Conventionally, for example, when manufacturing a magnet roll, a plate-shaped resin magnet is adhered to the shaft surface, or a resin magnet formed into a shape conforming to a magnetic pattern is attached to the shaft surface. Or cut the resin magnet extruded into a cylindrical shape to a fixed size,
It was manufactured by inserting a shaft later and fixing it with an adhesive or the like. Also, when manufacturing rubber rollers,
The cylindrical rubber layer and the shaft were separately formed, and a roller was inserted into the rubber layer later and fixed with an adhesive or the like to assemble.

[0003]

However, as in the conventional method, the covering member on the rod surface and the rod are separately manufactured and then fixed and fixed with an adhesive or the like. In addition, there are problems in quality and operation management such as displacement between the rod and the covering member.

Therefore, the present invention enables the production of a rod having a covering member on the surface by continuous operation, the excellent quality without the influence of an adhesive or the like, and the production without damaging another member on the surface. An object of the present invention is to provide a method for manufacturing a certain magnet roll.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a method of fitting a shaft having bearings at both ends and a socket having a through-hole capable of being fitted into the bearing. According to the step of holding the socket on the inlet side and the outlet side by the clamp portion in a state where the connecting shaft body in which the shaft and the socket are sequentially connected is positioned from the inlet side to the outlet side so as to pass through the die of the extruder. When;
A single unit socket formed by fitting one shaft and one socket from the entrance side of the die is gripped and moved by the clamp part, and is fed in order using the fitting between the socket and the shaft bearing part. A step of passing the connecting shaft body through the die of the extruder to continuously coat the magnetic substance-containing resin on the surface; and, at the exit side of the die, the coated connecting shaft body is connected to the shaft and the socket by the cutter unit. Cutting the magnetic substance-containing resin between the above, moving the clamp portion holding the socket, and extracting a single unit that is a part of the connecting shaft body coated with the magnetic substance-containing resin; and Forming a magnetic substance-containing resin-coated roll by separating the socket from the coated single unit;
Alternatively, it comprises a step of magnetizing at the die exit.

Further, it is preferable that the magnetic substance-containing resin is peeled off from the surface of the socket separated from the single unit coated with the magnetic substance-containing resin so that the socket can be reused.

[0007]

[0008]

As described above, according to the method of manufacturing a magnet roll of the present invention, a shaft having bearings at both ends and a socket provided with a through hole capable of being fitted into the bearings are fitted to each other. The sockets on the inlet side and the outlet side are held by the clamp part while the connecting shaft body, which is connected in order with the socket, is positioned from the inlet side to the outlet side so as to pass through the die of the extruder. A single unit socket formed by fitting one shaft and one socket from the side is gripped and moved by the clamp part, and connected by feeding in order using the fitting of the socket and the shaft bearing part. The shaft body is passed through the die of the extruder to continuously coat the surface with the resin containing the magnetic substance, and at the outlet side of the die, the coated connecting shaft body is sealed with a cutter. Cutting the magnetic material-containing resin between the shaft and the socket, moving the clamp portion holding the socket, extracting a single unit that is a part of the connection shaft body coated with the magnetic material-containing resin, By separating the socket from the resin-coated single unit, a magnetic material-containing resin-coated roll can be formed, and this magnetic material-containing resin-coated roll can be magnetized at the die outlet.

Further, the magnetic substance-containing resin on the surface of the socket separated from the single unit coated with the magnetic substance-containing resin can be peeled off.

[0010]

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the rod coating method of the present invention, it is possible to manufacture a magnet roll, a rubber roll, or perform plating on the pipe surface. And the rod to cover can also be various polygonal pillars such as hollow, solid, cylindrical, triangular, square, etc.
A resin magnet, rubber, plating, synthetic resin, or the like can be used. Thus, the method of coating the rod of the present invention comprises:
It can be used in various industrial fields,
Here, a method of manufacturing a magnet roll will be described as an example, and the details will be described with reference to an embodiment illustrated in the drawings.

First, a description will be given of a magnet roll manufacturing apparatus M which is a specific means for achieving the method of manufacturing a magnet roll. In order to explain the device M, it is necessary to first explain the shaft 1 as a rod and the socket 2 as a connecting member. That is, as shown in FIG. 1, the shaft 1 has a bearing portion 4 as a small diameter portion at both ends of a cylindrical shaft body 3.
The socket 2 has a through hole 5 which is approximately twice as long as the shaft bearing portion 4 and which can be fitted into the bearing portion 4. It is a cylindrical body having an outer diameter substantially the same as the outer diameter of the shaft main body 3 made of a metal such as stainless steel. The shaft 1 and the socket 2 are sequentially fitted to form a connecting shaft body 7 as a connecting body, and the shaft 1 and the socket 2 are sequentially fed and fitted to be moved, and the magnetic material-containing resin 6 , It is possible to continuously manufacture the magnet roll A. Further, in the apparatus M shown in the figure, a device in which the socket 2 is fitted to only one end of the shaft (hereinafter, simply referred to as a single unit 1a) as shown in FIG. Then, the single unit 1a is moved. Note that the shaft 1 is cylindrical, and there are hollow and solid shafts. In addition, the shaft 1 is not particularly limited to a cylindrical shape, and may be a prism such as a square pillar. Accordingly, the shape of the socket 2 can also be a prism such as a quadratic prism. In addition, socket 2
Is not limited to the above, but may be any as long as it has a through-hole 5 that can simply fit the adjacent shaft bearing portion 4 and can connect the shaft 1. In addition, it is only necessary to provide a concave / convex portion for fitting at the end of the shaft 1 and the end of the socket 2. In extreme cases, the socket 2 does not have the bearings 4 at both ends of the shaft 1. Any cylindrical body having an inner diameter that can be fitted outside may be used. In addition, particularly, as shown in FIG.
If the length of the socket 2 is different, the socket 2 is longer than the corresponding length of the bearings 4 and 4 'to be connected, that is, l in FIG.
It is preferable that the shaft body 3 has a length equal to or longer than ₁ + l ₂ and has the same outer diameter.

The magnet roll manufacturing apparatus M includes an extruder 8, an inlet-side transfer unit 9, a cutter unit 10, an outlet-side transfer unit 11, a separation unit 12, a heater 13, a cooler 14, and a magnetizer (not shown). , And stripping means 15.

The extruder 8 has a die 16 as shown in FIG. 1 and supplies a molten magnetic material-containing resin into the die 16, and moves the connecting shaft body 7 through the die 16. Thereby, the magnetic material-containing resin 6 can be coated on the surface of the shaft 1. This extruder 8
Is a coating device.

[0015] As shown in FIG.
A pair of rodless air cylinders 19 in which the sliding member 17 moves along the guide 18 at the entrance side of the die 16 are arranged in a pair to form a right rodless air cylinder 19a and a left rodless air cylinder 19b, Sliding member
17 is provided with clamp portions 22, 22 with clutches 20, 20 and gears 21, 21 interposed therebetween, and endlessly rotating chains 23, 23 meshing with the gears 21, 21 are arranged in an interlocked state, particularly It can be driven by an electric motor (not shown) or the like. That is, the clutches 20, 20 are released, the clamp portions 22, 22 can be moved back and forth by the rodless air cylinders 19a, 19b, and the linked chains 23, 23 are always rotated at a constant speed, and the clutch 20 , If you put 20, gear
When the chains 21 and 21 are engaged with the chains 23 and 23, the clamp unit 2 is driven forward by a motor or the like at a constant speed.
2, 22 move forward. Hereinafter, in FIG. 1, the movement from left to right is defined as forward, and the movement from right to left is defined as retreat. In addition, although the inlet side transfer means 9 enables a series of movements by combining the air cylinder 19 and an electric motor, it is also possible to use only the air cylinder or only the electric motor or the like. .
Further, the number of the clamp portions 22, 22 is not limited to two, and may be two.
It is also possible to use more than one clamp.

As shown in FIG. 1, the outlet-side transfer means 11
On the exit side of the die 16, a sliding member 24 is arranged in a pair with a rodless air cylinder 26 that moves along a guide 25 to form a right rodless air cylinder 26 a and a left rodless air cylinder 26 b, Sliding member
Clamps 27, 27 are provided at the tip of 24, and the clamps 27, 27 can be moved back and forth by rodless air cylinders 26a, 26b. The outlet-side transfer means 11 is
Although a series of movements is possible using only the air cylinder 26, it is also possible to perform the movement using only the electric motor or the like, or to combine them. Also,
The rodless air cylinders 19 and 26 use only rodless air cylinders as an example, and may be ordinary air cylinders. Further, the number of the clamp portions 27 and 27 is not limited to two and is not limited to two. It is also possible to use more than one clamp.

As shown in FIG. 3, the clamp portions 22 and 27 are composed of a support clamp 28 and a clamping clamp 29, and the base end of the support clamp 28 is pivotally connected to be rotatable. It is set so as to move forward and backward, and can be opened and closed freely in association with a driving source such as an air cylinder and a motor (not shown). Thus, as shown in FIG. 3, since the support clamp 28 and the clamping clamp 29 in the clamp portions 22 and 27 are greatly opened, one of the clamp portions 22 and 27 grips the shaft 1 and the other clamp portions 22 and 27 are opened. In the state, it is possible to pass each other. In particular, since the clamp portion 27 in the outlet side transfer means 11 is easily slippery, it is preferable to provide a protrusion on the gripping surface of the support clamp 28 and the holding clamp 29 and directly grip the socket metal portion without interposing the resin layer. . The structure of the clamp portions 22 and 27 is not limited to these, and various known shape clamp portions can be used. If the shaft 1 can be moved, the clamp portions 22 and 27 can be used. Various mechanisms other than the section can be used.

The cutter means 10 is shown by an imaginary line in FIG. 1 and is for cutting the magnetic material-containing resin 6 coated on the surface of the shaft 1. Concrete cutter means 10
As shown in FIGS. 4 and 5, holding members 31, 31 provided with guide notches 30 that can be fitted to and held on the connecting shaft body 7 from the lower end to the middle thereof are separated by the length of the socket 2 and are parallel. Body
The holding member 31 is provided with a rotating body 34 extending from the holding member 31 and also having a notch 33, and the rotating body 34 is provided with a cutter 35 for holding a state in contact with the connecting shaft body 7. By rotating the rotating body 34 in the holding member 31 in association with a driving source such as an air cylinder or a motor (not shown), the magnetic material-containing resin 6 between the shaft 1 and the socket 2 in the connecting shaft body 7 is rotated. Is cut off, so that the shaft 1 and the socket 2 covered with the magnetic material-containing resin 6 can be separated. Further, as shown in FIG. 4, a U-shaped positioning member 36 is provided between the holding members 31 so as to be able to fit onto the clamp portion 27 in a gripped state, so that the connecting shaft body 7 moves forward. The cutter 35, 35 can be accurately positioned by the positioning member 36, and the magnetic material-containing resin 6 can be cut off. In particular, as shown in FIG. 4, the positioning member 36 in the illustrated example is provided with a tapered portion that expands outward so that the positioning of the cutter means 10 is easy and the clamp portion 27 is easily pulled out.

The separating means 12 clamps a part of the connecting shaft body 7 extracted by the clamp part 27 after being cut by the cutter means 10, in FIG. In addition, the bearing unit 4 is sandwiched by a rotating member 38 having a chuck, and the shaft 1 is rotated by the rotating member 38 to make it easier to pull out.
The socket 2 can be separated from the shaft 1 by holding the socket 2 and the bearing 4 again by two clamps and pulling them apart.

The heater 13 is installed on the die 16 inlet side of the extruder 8 in FIG.
It is preheated by a heat source before entering the inside, and the adhesive attached to the surface is heated to improve the adhesiveness of the magnetic material-containing resin 6. Various heaters such as gas heating and resistance heating can be used as the heater 13, but the apparatus M in the illustrated example uses an induction heater in consideration of efficiency and cleanliness.

The cooler 14 cools and hardens the magnetic material-containing resin 6 coated on the surface of the connecting shaft body 7 using water or the like. Depending on the components such as the magnetic material-containing resin, it is not necessary to particularly provide the heater 13 and the cooler 14, and only one of them may be provided.

The stripping means 15 strips off the magnetic material-containing resin 6 of the socket 2 covered with the magnetic material-containing resin 6 as shown in FIG. 6, for example, as shown in FIG. And a plurality of or only one such as four or two, and a sharply-tipped cutter piece 37 and a stopper member elastically urged in a V-shape by an elastic member 39 such as a coil spring.
It comprises a plate 40a having a space 40 through which the socket 2 body can barely pass. For example, by pushing the small-diameter portion 41 ′ of the rod 41 in a state fitted into the through hole 5 of the socket 2, the magnetic material-containing resin 6 covered with the cutter pieces 37. When the magnetic material-containing resin 6 is completely cut with the passage, the magnetic material-containing resin 6 is further pushed in, and the stopper member 40 is expanded against the elastic member 39 while the magnetic material-containing resin 6 is peeled off at the end of the plate 40a. When the rod 41 is pulled out after passing through the stopper piece 40, the rod 2 is hooked on the stopper piece 40 which has returned to the original state by the elastic member 39, and the socket 2 can be dropped and collected. Therefore, there is no need to prepare a large number of sockets 2 for continuous operation.

According to the magnet roll manufacturing apparatus M, first, as shown in FIG. 1, a shaft 1 having an adhesive applied to the surface thereof and a normal socket 2 are stocked, and one shaft 1 is formed. The single socket 2 is fitted to form a single unit 1a, and the clamp 22
It is supplied to. Next, for example, the connecting shaft body 7 is formed by fitting and connecting the four shafts 1 and the four sockets 2 in order, and the inlet-side transfer means so that the shaft bearing portion 2 is positioned at the outlet end. 9 left clamp
This state is maintained by gripping the sockets 2 and 2 by the left clamp portion 27a of the outlet side transfer means 11 and 22a. On the inlet side of the die 16 of the extrusion molding machine 8, the socket 2 of the single unit 1a is gripped by the right clamp portion 22b of the inlet side transfer means 9 and the right rodless air cylinder 19b is released with the clutch 20 released. As a result, the vehicle is moved forward at a high speed, and the speed is reduced immediately before connection to connect to the connection shaft body 7. At this time, the clutch 20 is engaged, the gear 21 and the chain 23 are engaged, and the right clamp portion 22b is pushed out at a constant speed. As a result, the connecting shaft body 7 passes through the die 16 and the surface is coated with the magnetic material-containing resin 6. In addition, single unit 1
At the same time as connecting the a to the connecting shaft body 7, the left clamp portion 22a of the left rodless air cylinder 19a is opened, the clutch 20 is separated, and the left clamp portion 22a is moved rearward at a high speed by the air cylinder 19a and waits. After that, similarly, the left clamp portion 22a grasps the socket 2 portion of the single unit 1a and moves forward at a high speed. Then, just before the connection, the speed is reduced and the clutch 20 is engaged, and the gear 21 and the chain 23 are engaged. Then, by pushing the left clamp portion 22b at a constant speed, the connecting shaft body 7 is continuously fed into the die 16 after passing through the heater 13. Thus,
The magnetic material-containing resin 6 is coated on the surface of the connecting shaft body 7 in the die 16, and cooled by the cooler 14.
Are continuously sent out, at the exit side of the die 16, the left clamp portion 27a grips the socket 2 portion of the connecting shaft body 7, and the air cylinder 26a applies a constant air pressure in a direction opposite to the forward direction. Move forward at speed. Then, during this forward movement, the cutter means 10 which has been waiting above descends, and as shown in FIG. 4, the holding member 31 is positioned while positioning the left clamp portion 27a inside the positioning member 36.
The connecting shaft body 7 is positioned in the guide notch 30 of the above, the rotating body 34 in the holding member 31 rotates simultaneously and the cutter section 35,
After cutting the magnetic material-containing resin 6 between the shaft 1 and the socket 2 by 35 and raising the cutter means 10, the left clamp portion 27a is advanced, and a part of the connecting shaft body 7, FIG.
Then, the coated single unit 1a is withdrawn, advanced at a high speed, and transported to the location of the separating means 12. Then, while the cutter means 10 is operating, the right clamp portion 27b located at the front end of the air cylinder 27b retreats and waits,
Before the left clamp 27a advances at a high speed, the socket 2 of the connecting shaft body 7 is gripped, and after the cutter means 10 is operated in the same manner, the coated single unit 1a is pulled out and advanced, and the Transport to the place. Further, a part of the connecting shaft body 7 coated with the magnetic material-containing resin 6, in FIG.
Although not shown, the socket 2 can be separated from the shaft 1 by separating the socket 2 and the bearing 4 of the shaft 1 while holding the socket 2 and the bearing portion 4 of the shaft 1 with a clamp which is a separating means 12, thereby producing a resin-coated roll A containing a magnetic material. , Socket 2 are collected. The magnet-containing resin-coated roll A is magnetized by a magnetizer (not shown) to complete the magnet roll. Moreover,
As shown in FIG. 6, these sockets 2 are pushed in with the tip small diameter portion 41 ′ of the rod 41 fitted in the through hole 5 of the socket 2, for example, so that the magnetic material covered with the cutter pieces 37. The resin-containing resin 6 passes while being stripped off, and the magnetic substance-containing resin 6 is completely stripped off with the passage,
By further pushing in, the stopper piece 40 is expanded against the elastic member 39, passes through the stopper piece 40, and when the rod 41 is pulled out, the stopper member 40 is returned to the original state by the elastic member 39 and is caught by the stopper member 40. It can be dropped and collected, collected behind the right rodless air cylinder 19b, and reused. It is to be noted that a magnetizer can be provided at the exit of the die 16 and magnetized at this exit, so that a magnet roll can be manufactured continuously.

The movement of the clamp 22 of the inlet-side transfer means 9 and the clamp 27 of the outlet-side transfer means 11 depends on the support of the connecting shaft 7 on the inlet side of the die 16 of the extrusion molding apparatus 8.
And the operation of moving the socket 2 while gripping it and pushing it into the connecting shaft body 7 is performed alternately using the two clamp portions 22, 22 of the inlet-side transfer means 9, and at the same time, the die 16 outlet side of the extruder 8. The operation of supporting the connection shaft body 7 and moving the connection shaft body 7 cut by the cutter unit 35 while gripping a part of the connection shaft body 7 will now be described.
What is necessary is just to enable continuous operation by alternately using the two clamp portions 24, 24 in 11. Further, in the magnet roll manufacturing apparatus M of the illustrated example, the connecting shaft body 7 is pushed in by the clamp portion 22 of the inlet side transfer means 9 and passes through the die 16 of the extruder 8. It is also possible to carry out only by pulling out the connecting shaft body 7 by the clamp portion 27 of FIG.

Next, a method of manufacturing a magnet roll will be described. As shown in FIG. 1, a method of manufacturing a magnet roll is such that a shaft 1 having bearings 4 at both ends and a socket 2 having a through hole 5 that can be fitted into the bearing 4 are fitted to the shaft 1. Holding the connecting shaft body 7 in which the socket 1 and the socket 2 are connected in order from the inlet side to the outlet side so as to pass through the die 16 of the extruder 8; Preheating the connecting shaft body 7 before passing through the die;
The connecting shaft body 7 is passed through the die 16 of the extruder 8 by sequentially feeding the shaft 1 from the inlet side of the shaft 16 using the fitting of the socket 2 and the shaft bearing portion 4 to contain a magnetic material on the surface. A step of continuously coating the resin 6; a step of cooling the connecting shaft body 7 before cutting by the cutter unit 35 at the exit side of the die 16; and a step of cooling the connected connecting shaft body 7 at the exit side of the die 16. A step of cutting the magnetic material-containing resin 6 between the shaft 1 and the socket 2 with the cutter unit 35 and extracting a part of the connection shaft body 7 coated with the magnetic material-containing resin 6; A step of forming the magnetic substance-containing resin-coated roll A by separating the socket 2 from a part of the connected shaft body 7; and a step of magnetizing the magnetic substance-containing resin-coated roll A or at the exit of the die 16; ; Separated software Tsu bets surface magnetic material-containing resin 6
The magnet roll can be manufactured by the step of peeling off.

Before passing through the die 16 of the extruder 8, a step of preheating the connecting shaft body 7 is performed.
A step of cooling the connecting shaft body 7 before cutting by the cutter unit 35 at the outlet side is not always necessary, but a step of preheating the connecting shaft body 7 before passing through the die 16 of the extruder 8. When the adhesive is provided, the adhesive is applied to the shaft 1.
Even if it is applied to the surface and dried once, the connecting shaft body 7 is preheated before passing through the die 16 of the extruder 8, so that the magnetic material-containing resin 6 can be coated. There is no need to coat the magnetic material-containing resin 6 during the coating and drying, so that a large number of shafts 1 coated with the adhesive can be stocked. In the case where a step of cooling the connecting shaft body 7 is provided before cutting at the section 35, the coated magnetic material-containing resin 6 can be rapidly cured, and handling in the subsequent step is facilitated. Even if the magnetic material-containing resin 6 is gripped by the clamp portion 24 in FIG.
This has the effect that it is possible to solve troubles such as sticking to the surface.

As described above, according to the method of manufacturing the magnet roll of the present invention, the shaft 1 is positioned from the entrance side of the die 16.
Are sequentially fed using the fitting of the socket 2 and the shaft bearing portion 4 to pass the connecting shaft body 7 through the die 16 of the extruder 8 to continuously coat the magnetic material-containing resin 6 on the surface. Therefore, compared to a method of manufacturing a conventional resin magnet separately and assembling the shaft surface later using an adhesive, it becomes possible to continuously manufacture the magnetic material-containing resin-coated roll A, Further, the quality is not degraded due to the displacement of the shaft and the resin magnet or the influence of the adhesive or the like. In particular, according to the magnet roll manufacturing apparatus M, the socket 2 is used as a place where the clamp portions 22 and 24 grip the connecting shaft body 7 and the like.
The magnet roll A can be manufactured without damaging the magnetic material-containing resin 6 coated on the shaft 1. A shaft body made of a metal such as stainless steel having a length approximately twice as long as the shaft bearing portion 4 and having a through hole 5 that can be fitted into the bearing portion 4 as the socket 2. (3) Since a cylindrical member having substantially the same outer diameter is used, when the connecting shaft body 7 is formed, the shaft 1 and the socket 2 are in close contact with no gap, and the magnetic material-containing resin 6 is uniformly coated. You.

As described above, the rod coating method of the present invention is exemplified by a method of manufacturing a magnet roll. Specifically, the shaft 1 is used as the rod, the socket 2 is used as the connecting member, and the extruder 8 is used as the coating device. Although the connecting shaft body 7 is shown as a connecting body, these are replaced with other members, and a device for melting and attaching rubber, a plating device, and the like are used to manufacture a rubber roll, a plating process on a pipe surface, and the like. Different coatings can be applied to different rods.

[0029]

Since the present invention is configured as described above, the following effects can be obtained. According to the method of manufacturing a magnet roll according to the first aspect, the shaft is fed in order from the entrance side of the die using the fitting between the socket and the shaft bearing portion, so that the connection shaft body is passed through the die of the extruder. Since the magnetic material-containing resin can be continuously coated on the surface by passing through, the conventional resin magnet is manufactured separately, and compared with the method of assembling the shaft surface later using an adhesive, the magnetic material-containing resin is The coating roll can be manufactured continuously, and the quality is not degraded due to the displacement of the shaft and the resin magnet or the influence of an adhesive or the like. Furthermore, according to the method of manufacturing a magnet roll according to claim 1, the socket is used as a place where the clamp portion grips the connecting shaft body or the like, so that the magnetic material-containing resin coated on the shaft is not damaged.
Magnet rolls can be manufactured.

According to the method of manufacturing a magnet roll of the present invention, the magnetic substance-containing resin on the surface of the socket separated from the single unit coated with the magnetic substance-containing resin is peeled off, and the socket can be reused. This eliminates the need to prepare a large number of sockets for continuous operation.

[0031]

[Brief description of the drawings]

FIG. 1 is an explanatory plan view schematically showing a magnet roll manufacturing apparatus.

FIG. 2 is a sectional view showing a connection state between a socket and a shaft.

FIG. 3 is a side view showing movement of a clamp unit.

FIG. 4 is a front view of a cutter unit.

FIG. 5 is a side view of a cutter unit.

FIG. 6 is an explanatory view showing a step of peeling off the magnetic substance-containing resin on the surface of the separated socket.

FIG. 7 is an explanatory plan view showing the operation of the magnet roll manufacturing apparatus.

[Explanation of symbols]

Reference Signs List A Magnetic-material-containing resin-coated roll M Magnet-roll manufacturing device 1 Shaft 2 Socket 3 Shaft main body 4 Bearing 5 Through hole 6 Magnetic-material-containing resin 7 Connecting shaft 8 Extruder 9 Inlet-side transfer means 10 Cutter means 11 Outlet-side transfer Means 12 Separation means 13 Heater 14 Cooler 15 Stripping means 16 Dies 17 Sliding member 18 Guide 19 Rodless air cylinder 20 Clutch 21 Gear 22 Clamp part 23 Chain 24 Sliding member 25 Guide 26 Rodless air cylinder 27 Clamp part 28 Support clamp 29 Clamp clamp 30 Guide notch 31 Holding member 32 Main body 33 Notch 34 Rotating body 35 Cutter section 36 Positioning member 37 Cutter piece 38 Rotating member 39 Elastic member 40 Stopper member 41 Rod

Claims (2)

(57) [Claims] 1. An extruder for connecting a shaft having bearing portions at both ends thereof to a socket having a through-hole capable of being fitted to the bearing portion, thereby connecting the shaft and the socket in order. Holding the sockets on the inlet side and the outlet side by a clamp part while being positioned from the inlet side to the outlet side so as to pass through the inside of the die, one shaft and one socket from the inlet side of the die The socket of a single unit formed by fitting is moved by grasping it with the clamp part, and is fed in order using the fitting between the socket and the shaft bearing part, so that the connecting shaft body passes through the die of the extrusion molding machine. A step of coating the surface continuously with a magnetic material-containing resin on the surface, and, on the exit side of the die, the coated connecting shaft body containing a magnetic material between the shaft and the socket at a cutter portion. Cutting the grease, moving the clamp part holding the socket, and extracting a single unit that is a part of the connection shaft body coated with the magnetic material-containing resin; and a single unit coated with the magnetic material-containing resin. A method of manufacturing a magnet roll, comprising: a step of forming a magnetic substance-containing resin-coated roll by separating sockets; and a step of magnetizing the magnetic substance-containing resin-coated roll or at a die exit. 2. The method of manufacturing a magnet roll according to claim 1, wherein the magnetic substance-containing resin is removed from the surface of the socket separated from the single unit coated with the magnetic substance-containing resin, and the socket can be reused.