KR101483300B1 - Manufacture of rotor core for motor-operated valve, rotor feed screw and rotor - Google Patents

Abstract

assignment

Thereby improving the manufacturing process of the rotor core for the electric valve, the rotor feed screw and the rotor, and reducing the manufacturing cost of the electric valve.

Solution

It is possible to use the mold apparatus 23 which can open and close to divide the molding cavity 28 of the sleeve 14 and the mold apparatus 23 is provided with the molding concave portion 24a of the valve closing regulation stopper 14a, The bush 11 is provided with the first positioning portion 27a corresponding to the first positioning portion 27a and the first positioning portion 27a corresponding to the first positioning portion 27a when the first positioning portion 27 is aligned with the first positioning portion 27a, The second positioning portion 11c is provided so that the molding recesses 24a of the valve closed cylindrical material stoppers 14a correspond to the first positioning portions 11b and the second positioning portions 11c, The molten resin is injection-injected into the cavity 28 after the mold apparatus 23 is closed and the rotor core body 19 is manufactured by injecting molten resin into the cavity 28 do. In the same manner, the rotor feed screw 20 and the rotor 40 are manufactured.

Description

TECHNICAL FIELD [0001] The present invention relates to a rotor core for a motor-operated valve, a rotor feed screw, and a manufacturing method of the rotor.

The present invention relates to a rotor core used for controlling a flow rate of a fluid such as a refrigerant in a refrigeration cycle system and disposed at the center of a rotor of a motorized valve having a valve body linearly moved by rotation of the rotor, A rotor feed screw for moving the rotor, and a manufacturing method of the rotor.

Patent Document 1 discloses a conventional electromagnetic valve having a first flow path 52 and a second flow path 53 communicating with a valve type 51 as shown in FIG. A needle valve 57 of a main shape to be brought into contact with the seat valve seat 56 of the valve body 55 and a needle valve 57 of a cylindrical shape sealed in the cylindrical sealing case 59 A stator coil 67 which is disposed outside the closed casing 59 and a stator coil 67 which is rotated inside the closed casing 59 by energization of the stator coil 67, A rotor 64 having a tubular sleeve 62 and a tubular permanent magnet 63 fixed to the outside of the sleeve 62 by a retaining ring 66 and a rotor 64 And the lower cover 60 of the closed case 59 is connected to the valve body 55 by a screw feed operation by the rotation of the needle valve 57 A fixed contact electrically-operated valve 50 has been proposed.

6 and 7 (b), the valve closing regulating stopper 62a is provided at the lower end portion of the sleeve 62 and the valve closing regulating stopper 62a is provided at the lower end portion of the sleeve 62. As shown in Figs. 6 and 8 (b) Closing stopper 58a is provided on the flange body 59 and the valve closing metal material stopper 62a is attached to the full-closing stopper 58a at the time of closing the valve of the needle valve 57 as shown in Fig. As shown in the figure, by abutment, the rotor 64 is further prevented from descending at the time of closing the valve.

7 (b) from the lower end of the bush 68 to the lower end of the valve-closing regulating stopper 62a is smaller than the dimension h4 of the female screw 68a, And the dimension h5 from the upper end of the male screw tube 61 to the upper end of the full closing stopper 58a shown in FIG. 8 (b) is set to an integral multiple of the pitch of the male screw 61a + Pitch / 2, and the amount of contact between the valve closing regulating stopper 62a and the full-closing stopper 58a is adjusted to the screw pitch / 2.

Patent Document 1: Japanese Patent No. 3310042

Conventionally, when manufacturing the rotor center body 69 (which is a combination of the sleeve 62 and the bush 68 as shown in Fig. 6) disposed at the center of the rotor 64 of the electric valve 50 As shown in Fig. 7, an openable / closable mold apparatus 71 for partitioning the cumulative cavity 73 of the sleeve 62 is used. The lower mold 72 of the mold apparatus 71 is provided with a molding concave portion 72a of the valve closing regulating stopper 62a and a key ridge 72b on the inner periphery opened at the center of the molding cavity 73, The set pin 74 having the bush 68 fixed to the pin attaching hole 72c of the lower mold 72 is fixed to the pin attaching hole 72c of the lower mold 72 after the molding of the sleeve 62, The leading end portion 68b of the female thread 68a of the bush 68 is positioned at the position corresponding to the forming concave portion 72a of the valve closing regulating stopper 62a, The key ridge 72b and the key groove 74a (provided at the lower outer peripheral portion of the set pin 74) are engaged with each other and the pin end portion of the bush 68 abuts against the bottom surface 68c, A predetermined dimension h4 which is an integral multiple of the pitch of the female screw 68a of the bush 68 is maintained between the stopper forming recess 74b and the inner bottom face of the stopper forming recess 72a, ). The molten resin is injection-injected into the molding cavity 73 and the rotor core body 69 as shown in Figs. 7B and 7C, in which the bush 68 and the sleeve 62 are integrated, .

8, a mold apparatus 80 for partitioning the molding cavity 82 of the flange body 58 is also used for the rotor feed screw 70. As shown in Fig. The lower mold 81 of the mold apparatus 80 is provided with a molding recess 81a of the valve full closing stopper 58a and a bush attaching portion 81b having a key ridge 81b on the inner bottom face opened to the center of the molding cavity 82 And a set bush 83 in the form of a bottomed cylindrical barrel in which the male screw 61 is screwed and fixed to the bush attaching hole 81c of the male die 81 is screwed into a male screw The key stop 81b and the key groove 83a (provided at the lower end of the set bush 83) are aligned with the stopper forming concave portion 81a so as to correspond to the stopper forming concave portion 81a, And is attached as shown in Fig. 8 (a) in a state in which the base end attaching portion 61c of the male thread tube 61 protrudes upward of the lower die 81. As shown in Fig. 8 (b) and 8 (c), in which the mold apparatus 80 is closed and the molten resin is injection-injected into the constant cavity 82 and the male screw 61 and the flange 58 are integrated, The rotor feed screw 70 is manufactured.

The set pin 74 and the set bush 83 are prepared and the bush 68 and the male screw 61 are assembled in the rotor center body 69 and the rotor feed screw 70 as described above, It is necessary to perform the resin molding by using the mold apparatus 71 and the mold apparatus 80 so that labor is required for manufacturing the rotor center body 69 and the rotor feed screw 70, There is a problem that the manufacturing cost of the valve 50 is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems in the prior art, and it is an object of the present invention to provide an electric motor which is capable of improving the manufacturing process of the rotor core, the rotor feed screw and the rotor for the motorized valve, An object of the present invention is to provide a valve rotor core, a rotor feed screw and a method of manufacturing the rotor.

In order to achieve the above object, the present invention is a rotor centering body disposed at the center of a corresponding rotor of a motor-driven valve having a valve body linearly moved by rotation of the rotor of the electric motor, And a valve closing regulating stopper for regulating movement in the closing direction of the sleeve, a tubular sleeve whose entire body is molded from a synthetic resin, and a bush which is integrally fixed to the inner peripheral portion of the sleeve, Wherein a mold cavity of the mold cavity is formed by using a mold device capable of forming a mold cavity of the sleeve and a molding cavity of the valve closing regulation stopper and a molding cavity of a first Wherein the bush is provided with a positioning portion of the bush, when the bush is aligned with the first positioning portion, A second positioning portion is provided so as to correspond to a position where the thread cutting end portion and the molding recess of the valve closing regulation stopper are positioned, and the bush is disposed so that the bush is aligned with the first positioning portion And the rotor core body is manufactured by injecting a molten resin into the cavity after the mold apparatus is closed and manufacturing the rotor core body.

According to the present invention, the bush is formed with a threaded cutting end portion of a female screw and a second positioning portion corresponding in position to the thread cutting start portion at the same time, and the bush is positioned in the first positioning It is possible to manufacture a rotor core body by injecting molten resin into the mold apparatus after closing the mold apparatus. Therefore, it is not necessary to use a set pin as in the prior art, It is possible to easily manufacture the rotor core body by resin molding using only a mold apparatus.

Wherein the first positioning portion is a protruding portion or an end portion, and the second positioning portion is a key groove engaging with the protruding portion, or a key groove engaging with the protruding portion, It is possible to make the notch portion notched in a D shape as viewed in the axial direction of the rotor core body. Thereby, the first positioning portion and the second positioning portion can be simply formed.

Further, the present invention is a rotor feed screw that is threadedly engaged with a corresponding rotor of a motor-driven valve having a valve body that moves linearly by rotation of the rotor of the electric motor, has a male thread on the outer periphery, And a valve closure stopper for restricting movement of the rotor in the closing direction of the valve at the time of closing the valve. The valve body is integrally fixed to the outer periphery of the male and female threads, A method for manufacturing a rotor feed screw, comprising the steps of: using a mold device capable of opening and closing a molding cavity of the flange member, the molding die having a forming recess formed in the valve closing stopper, And the positioning portion of the male screw is provided on the male screw, and when the male screw is fitted into the first positioning portion, The second positioning portion is provided so that the molding start end portion and the molding recessed portion of the valve full closing stopper are positioned so that the male positioning portion and the second positioning portion are aligned with the first positioning portion, And the molten resin is injection-injected into the cavity after the mold apparatus is closed, thereby manufacturing a rotor feed screw.

Therefore, according to the present invention, the screw thread cutting end portion of the male screw and the second positioning portion corresponding to the position of the thread cutting start portion are simultaneously formed in the male screw and the male screw is inserted into the first Since it is possible to manufacture the rotor feed screw by inserting and injecting the molten resin after closing the mold apparatus after attaching to the mold apparatus so that the positioning section and the second positioning section are matched with each other, The rotor feed screw can be easily manufactured by resin molding using only a male screw and a die.

Wherein the first positioning portion is a protruding portion or an end portion and the second positioning portion is a key groove engaging with the protruding portion, It is possible to make the notch portion notched in a D shape when viewed from the axial direction of the rotor feed screw. Thus, the first positioning unit and the second ophthalmologic determination unit can be simply formed.

The present invention also relates to a rotor of a motor-operated valve having a valve body that linearly moves as the rotor of the electric motor rotates, comprising: a valve-closed metal member for controlling movement of the rotor in the valve- 1. A method of manufacturing a rotor for a motor-operated valve comprising a tubular rotor body having a stopper and formed entirely of synthetic resin, and a bush having a female screw on the inner periphery and integrally fixed to an inner peripheral portion of the rotor body, And a first positioning portion corresponding to the forming concave portion is provided in the mold apparatus, and the first positioning portion corresponding to the forming concave portion is provided in the mold closing device, When the first positioning portion is fitted to the first positioning portion, the thread cutting start end of the female screw and the end of the valve closing regulation stopper The positioning portion of the wool 2 is provided so that the concave portion corresponds to the position, the bush is mounted to the mold device so that the second positioning portion is in alignment with the first positioning portion, and after the mold device is closed And injecting a molten resin into the cavity to inject the molten resin into the cavity.

According to the present invention, the bush is formed with a threaded cutting end portion of a female screw and a second positioning portion corresponding in position to the thread cutting start portion at the same time, and the bush is positioned in the first positioning Since the mold apparatus is closed and the molten resin containing magnet powder is injected and injected by injecting the molten resin containing the magnet powder into the mold apparatus, It is possible to easily manufacture the rotor by resin molding using only the bush and the mold device.

Wherein the first positioning portion is a projecting portion or an end portion and the second positioning portion is a key groove engaging with the projecting portion or a portion of the key groove engaging with the end portion of the rotor, It is possible to make the notch portion notched in a D shape as viewed in the axial direction. With this. The first positioning portion and the second positioning portion can be simply formed.

As described above, according to the present invention, it is possible to simplify the manufacturing process of the rotor center body for a motor-operated valve, the rotor feed screw and the rotor, and to reduce the manufacturing cost of the motorized valve.

1 shows an example of a motorized valve incorporating a rotor core and a rotor feed screw manufactured by the method according to the present invention. The motorized valve 1 is composed of the above-described conventional motor-operated valve 50, A valve having a valve seat 5 in the valve chamber communicating portion of the second flow path 4 and having a first flow path 3 and a second flow path 4 communicating with the valve chamber 2, A tubular needle valve 8 which is brought into contact with the seat valve seat 7 of the valve body 6 and a cylindrical airtight case 9 which is arranged on the outer side of the airtight casing 9, A rotor 15 rotatable by the energization of the stator coil and movable in the valve opening / closing direction; and a needle valve (not shown) 8 and the lower cover 17 of the closed casing 9 is connected to the valve body 6, It is welded. The rotor 15 includes a tubular bush 11, a tubular permanent magnet 13 fixed to the outside of the bush 11 by a ring 12, a bush 11, And a cylindrical sleeve 14,

1 and 2 (c), the valve closing regulating stopper 14a is provided at the lower end portion of the sleeve 14, and the valve closing regulating stopper 14a is provided at the lower end portion of the sleeve 14 as shown in Figs. 1 and 3 (c) The full closing stopper 21a is provided on the flange 21 integrally formed with the male screw 16 and the valve closing regulating stopper 14a is moved to the full closing position when the valve of the needle valve 8 is closed. As shown in Fig. 1, when the valve 21a is closed by the abutment, the rotor 15 is further prevented from descending.

When the lowering of the rotor 15 is restricted, the dimension h1 from the bottom surface 11d of the bush 11 to the lower end of the valve closing regulating stopper 14a shown in Fig. 2 (c) And the dimension h2 from the upper end of the male screw tube 16 to the upper end of the full closing stopper 21a shown in Figure 3 (b) is larger than the dimension h2 of the female screw 16a Pitch + 2 / pitch / 2, and the amount of contact between the valve closing regulating stopper 14a and the full-closing stopper 21a is adjusted to the screw pitch / 2.

Next, a method of manufacturing the rotor centerbody 19 of the electric valve 1 will be described with reference to Figs. 1 and 2. Fig.

2 (a) and 2 (d) illustrate a mold apparatus 23 for manufacturing the rotor center body 19, and FIGS. 2 (b) 19). The mold apparatus 23 is provided with a top mold 23 and a bottom mold 27 having a mounting portion 27b for mounting the bush 11, The molding cavity 28 and the stopper forming recess 24a of the valve closing # regulating stopper 14a are formed. In addition, a key protrusion 27a engaging with the key groove 11c of the bush 11 is provided in the lower mold 27. In addition,

The position of the ceiling of the stopper forming concave portion 24a is set so that the distance from the top surface 11f is h1.

Next, a processing method of the bush 11 and a method of setting the position of the stopper forming concave portion 24a formed on the key trough 27a and the upper mold 24 formed on the lower mold 27 will be described.

2 (c) and 2 (d), when the rotor center body 19 is completed, the thread cutting start end portion 11b of the female screw 11a of the bush 11, The distance between the bottom surface 11d of the bush 11 and the lower end of the valve closing regulating stopper 14a of the sleeve 14 is smaller than the distance between the bottom surface 11d of the bush 11 and the lower end of the valve closing regulating stopper 14a It is necessary to configure it to be h1.

The bush 11 is formed with a key groove 11c engaged with the key top 27a formed in the lower mold 27 of the mold apparatus 23, The thread cutting start end 11b of the thread 11a is subjected to thread cutting. Here, as shown in Figs. 2 (b) to 2 (d), thread cutting is performed so that the center line of the key groove 11c and the thread cutting start end portion 11b are located on the same straight line O .

On the other hand, the position of the stopper forming concave portion 24a is set in the upper die 24 so that the rotor center body 19 becomes the state shown in Figs. 2B to 2D after the sleeve 14 is formed . That is, in the case where the bush 11 is subjected to thread cutting so that the center line of the key groove 11c and the thread cutting start end 11b are located on the same straight line O as described above, the central line of the key ridge 24a of the upper die 24 and the center of the stopper forming recess 24a are overlapped when the metal mold 23 shown in Fig.

The key 11c of the bush 11 is engaged with the key protrusion 27a of the lower mold 27 by using the bush 11 thus processed and the mold apparatus 23, The mold apparatus 23 is closed and the molten resin is injection-injected into the molding cavity 28 so that the bush 11 and the sleeve 14 are integrated with each other, The rotor core body 19 as shown in Figs. 2 (b) to 2 (d) can be manufactured.

Next, a method of manufacturing the rotor feed screw 20 of the electric valve 1 will be described with reference to Figs. 1 and 3. Fig.

3 (a) shows a mold apparatus 30 for manufacturing a rotor feed screw 20, and FIGS. 3 (b) to 3 (d) show a rotor feed screw FIG. The mold apparatus 30 includes a lower die 32 having a top die 31 and a mounting portion 32b for mounting the male screw tube 16, Forming cavities 34 of the stoppers 21 and stopper forming recesses 31a of the full-closure stoppers 21a are formed. In addition, a key stone (32a) engaging with the key groove (16c) of the male screw (16) is provided on the lower die (32). When the male screw tube 16 is placed on the mounting portion 32b of the lower die 32, the distance from the top of the male screw tube 16 to the top of the male screw tube 16 is set to h2, .

Next, a method of setting the position of the stopper forming concave portion 31a formed on the key figure 32a and the upper mold 31 will be described.

3 (b) and 3 (c), when the rotor feed screw 20 is completed, the thread cutting start end portion 16b of the male screw 16a of the male screw 19, The dimension between the upper end of the male screw tube 16 and the upper end of the full closing stopper 21a of the flange 21 is set to be equal to or smaller than the above h2 It is necessary to configure it.

The male screw 16 is formed with a key groove 16c engaged with the key groove 32a formed in the lower mold 32 of the mold apparatus 30. The key groove 16c is formed so as to correspond to the key groove 16c, The thread cutting start end portion 16b of the male thread 16a is thread-cut. Here, as shown in Figs. 3 (b) to 3 (d), thread cutting is performed so that the center line of the key groove 16c and the thread cutting start end 16b are located on the same straight line O .

On the other hand, the mold apparatus 30 is provided with the key ridge 32a and the stopper molding recess 32a so that the rotor feed screw 20 becomes the state shown in Figs. 3 (b) to 3 (d) The position of the portion 31a is set. That is, in the case where the male screw 16 is subjected to thread cutting so that the center line of the key groove 16c and the thread cutting start end 16b are positioned on the same straight line O as described above, The central line of the key ridge 32a of the lower die 32 and the center of the stopper forming recess 31a are overlapped when the mold apparatus 30 shown in Fig.

The key groove 16c of the male screw pipe 16 is engaged with the key groove 32a of the lower mold 32 by using the male screw tube 16 and the mold apparatus 30 which have been processed as described above, The molten resin is injected and injected into the molding cavity 34 so that the water injection tube 16 and the flange 21 (21) are placed on the mounting portion 32b of the lower mold 32, The rotor feed screw 20 as shown in Figs. 3 (b) to 3 (d) can be manufactured.

Next, as another embodiment of the present invention, a method of manufacturing the rotor of the electric valve will be described with reference to Fig. The rotor 40 manufactured in this embodiment includes a cylindrical rotor body 41 having a valve closing regulation stopper 41a and formed entirely of a resin material mixed with magnet powder, ) Is used in combination with the bush 11 used. The overall shape of the rotor main body 41 corresponds to a shape obtained by combining the permanent magnet 13 and the sleeve 14 shown in Fig.

4 (a) shows a mold apparatus 43 for manufacturing a rotor according to the present invention, and Figs. 4 (b) to 4 (d) show a rotor 40 manufactured by using a mold apparatus 43. Fig. / RTI > The mold apparatus 43 includes a lower mold 47 having an upper mold 44 and a mounting portion 47b for mounting the bush 11 and is provided with a rotor main body 41 And the stopper forming recess 44a of the valve closing regulating stopper 41a are formed. Further, a key stone 47a engaging with the key groove 11c of the bush 11 is provided in the lower die 47. [ The position of the ceiling of the stopper forming concave portion 44a is set so that the dimension to the top surface 11f of the bush 11 becomes h3.

Next, a method of setting the position of the stopper forming concave portion 44a formed in the key boss 47a and the upper die 44 formed in the lower die 47 will be described.

4 (c) and 4 (d), in the state in which the rotor 40 is completed, the thread cutting start end 11b of the female screw 11a of the bush 11 and the stopper 11b of the valve- 41a are positioned on the same straight line O and the dimension between the bottom surface 11d of the bush 11 and the lower end of the valve closed cylindrical material stopper 41a of the rotor body 41 is It is necessary to configure it to be h3.

The bush 11 is formed with a key groove 11c engaging with the key groove 47a formed in the lower mold 47 of the mold apparatus 40. The key groove 11c is engaged with the key groove 11c, The thread cutting start end 11b of the thread 11a is subjected to thread cutting. Here, as shown in Figs. 4 (b) to 4 (d), thread cutting is performed so that the center line of the key groove 11c and the thread cutting start end 11b are located on the same straight line O I do.

On the other hand, the mold apparatus 40 is provided with a key boss 47a and a stopper molding recessed portion (not shown) so that the rotor 40 is in a state shown in Figs. 4 (b) 44a. That is, in the case where the bush 11 is subjected to thread cutting so that the center line of the key groove 11c and the thread cutting start end 11b are located on the same straight line O as described above, the central line of the key ridge 47a of the lower die 47 and the center of the stopper forming recess 44a are overlapped when the mold apparatus 43 shown in Fig.

The bush 11 processed in the manner described above and the bushing 11 are provided so that the key groove 11c of the bush 11 engages with the key ridge 47a of the lower mold 47, The molten resin mixed with the magnet powder is injected and injected into the molding cavity 48 and the bush 11 and the rotor main body 41 are mounted on the mounting portion 47b of the upper mold 44, The rotor 40 shown in Figs. 4 (b) to 4 (d) can be manufactured.

In the above embodiment, the key groove 11c as shown in Fig. 5 (a) is formed in positioning the bush 11 or the like on the die, and the key groove (Fig. 2 (Notch portion notched in a D-shape as viewed in the axial direction of the bush 11 or the like) 11e as shown in Fig. 5 (b) is formed , It can be brought into contact with the end portion formed in the corresponding mold, or it can be formed in various other positions that can be positioned.

2, the center line of the key groove 11c of the bush 11, the thread cutting start end portion 11b, and the center of the valve closing regulation stopper 14a are the same The positional relationship between the key top 27a of the lower die 27 and the stopper forming recessed portion 27c of the upper die 24 is not limited to the same straight line O, 24a, the positional relationship can be various.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall sectional view showing an example of a motorized valve incorporating a rotor core and a rotor feed screw manufactured by the method according to the present invention; FIG.

Fig. 2 shows a mold apparatus, a bush, and a rotor core manufactured by the present invention, which are used when the method of manufacturing a rotor core according to the present invention is carried out, wherein (a) shows a state in which the bush is positioned in a mold apparatus (B) to (d) are a top view, a whole sectional view, and a bottom view, respectively, of the rotor core body after the sleeve molding.

FIG. 3 is a view showing a long-wave mold and a screw tube used in the method of manufacturing the rotor feed screw according to the present invention and a rotor feed screw manufactured by the present invention, wherein (a) (B) to (d) are a top view, a whole sectional view, and a bottom view, respectively, of a rotor feed screw after flange forming.

Fig. 4 shows a mold apparatus, a bush, and a rotor manufactured by the present invention, which are used in the method of manufacturing the rotor according to the present invention. Fig. 4A is an overall sectional view showing a state in which the bush is positioned in the mold apparatus, (b) to (d) are a top view, a whole sectional view, and a bottom view, respectively, of the rotor after the rotor body is molded.

5 is a perspective view showing a key groove and a D cut portion used for positioning a die such as a bush or the like in a manufacturing method of a rotor core body or the like according to the present invention.

6 is an overall sectional view showing an example of a conventional motor-operated valve.

(A) is a cross-sectional view for explaining a manufacturing method, (b) is a sectional view showing a manufactured rotor core body, and (c) is a cross- Is a bottom view of (b).

Fig. 8 is a view for explaining a rotor feed screw of the motor-operated valve of Fig. 6 and a method of manufacturing the same, wherein (a) is a cross-sectional view for explaining a manufacturing method, (C) is a top view of the rotor feed screw shown in (b). Fig.

(Explanation of Symbols)

1: electromotive valve 2: valve chamber

3: first flow path 4: second flow path

5: valve seat 6: valve body

7: seat valve seat 8: needle valve

9: sealed case 11: bush

11a: Female thread 11b: Thread cutting start end

11c: key groove 11d: bottom surface

11e: D cut portion 11: Top surface

12: alumina 13: permanent magnet

14: Sleeve 14a: Valve closing regulation stopper

15: rotor 16: male screw

16a: male thread 16b: thread cutting start end

16c: key groove 17: lower cover

19: rotor core 20: rotor feed screw

21: flange 21a: full closing stopper

23: mold device 24: upper mold

24a: Stopper forming recessed portion 27: Lower mold

27a: key ridge 27b:

28: forming cavity 30: mold device

31: Upper mold 31a: Stopper forming recessed portion

32: Lower mold 32a: Keystone

32b: mounting portion 34: molding cavity

40: rotor 41: rotor body

41a: a valve closing cylindrical material stopper 43: a mold apparatus

44: Upper mold 44a: Stopper forming recess

47: Lower mold 47a:

47b: mounting portion 48: molding cavity

h1 to h5: predetermined height dimensions

Claims (6)

A bush provided on the valve body and having a male thread on the outer periphery, a bush provided on the rotor of the electric motor and having a female thread on its inner periphery, and a male and female bushes connected to the bush by screwing, And a valve closing regulating stopper for regulating the movement of the rotor in the valve closing direction at the time of closing the valve, wherein the valve closing regulating stopper is formed as a synthetic resin And a bush which is integrally fixed to an inner peripheral portion of the sleeve, the method comprising the steps of: A mold apparatus comprising an upper mold and a lower mold capable of opening and closing to define a molding cavity of the sleeve, A molding recessed portion of the valve closing metal material stopper is provided in a top mold of the mold apparatus and a first positioning portion corresponding to the molding recessed portion is provided in the bottom mold, The bush is provided with a second positioning portion such that when the bush complies with the first positioning portion, the thread cutting end portion of the female screw corresponds to the forming recess of the valve closing regulating stopper, The bush is directly placed on the lower mold of the mold apparatus so that the second positioning section coincides with the first positioning section, And after the mold apparatus is closed, a molten resin is injection-injected into the cavity to manufacture a rotor core. The method according to claim 1, Wherein the first positioning portion is a protruding portion or an end portion, and the second positioning portion includes a key groove engaging with the protruding portion, or a notch that is notched D-shaped when viewed in the axial direction of the rotor central body, Wherein the step of forming the rotor core comprises the steps of: A bush provided on the valve body and having a male thread on the outer periphery, a bush provided on the rotor of the electric motor and having a female thread on its inner periphery, and a male and female bushes connected to the bush by screwing, A rotor feed screw threadedly engaged with a corresponding rotor of a motorized valve having a moving valve body, comprising: a male screw having an attachment portion to a valve body at an end thereof; And a plunger made of a synthetic resin which is integrally fixed to an outer periphery of the male screw tube, the method comprising the steps of: A mold apparatus comprising an upper mold and a lower mold capable of opening and closing to define a molding cavity of the flange, A molding recessed portion of the valve full closing stopper is provided in a top mold of the mold apparatus and a first positioning portion corresponding to the molding recessed portion is provided in the bottom mold, The second positioning portion is provided in the male screw tube so that the threaded cutting end portion of the male screw and the molding recessed portion of the valve full closing stopper are positioned so as to correspond to the first positioning portion, Directly placing the male screw tube on the lower mold of the mold apparatus so that the second positioning section coincides with the first positioning section, Wherein after the mold apparatus is closed, a molten resin is injection-injected into the cavity to manufacture a rotor feed screw. The method of claim 3, Wherein the first positioning portion is a protruding portion or an end portion, and the second positioning portion includes a key groove engaging with the protruding portion, or a notch that is notched D-shaped when viewed in the axial direction of the corresponding male or female tube, Wherein the rotor is provided with a plurality of projections. A bush provided on the valve body and having a male thread on the outer periphery, a bush provided on the rotor of the electric motor and having a female thread on its inner periphery, and a male and female bushes connected to the bush by screwing, A rotor body having a tubular rotor body having a valve closing regulation stopper for restricting movement of the rotor in the valve closing direction at the time of closing the valve and formed entirely of synthetic resin, And a bush which is integrally fixed to an inner peripheral portion of the rotor main body, A mold apparatus comprising an upper mold and a lower mold capable of opening and closing to define a molding cavity of the rotor main body, A molding recessed portion of the valve closing regulation stopper is provided in the upper mold of the mold apparatus and a first positioning portion corresponding to the molding recessed portion is provided in the lower mold, The bush is provided with a second positioning portion such that when the bush complies with the first positioning portion, the thread cutting end portion of the female screw corresponds to the forming recess of the valve closing regulating stopper, The bush is directly placed on the lower mold of the mold apparatus so that the second positioning section coincides with the first positioning section, And after the mold apparatus is closed, a molten resin is injection-injected into the cavity to manufacture the rotor. 6. The method of claim 5, Wherein the first positioning portion is a protruding portion or an end portion and the second positioning portion includes a key groove engaging with the protruding portion or a notch portion notched in a D shape as viewed in the axial direction of the rotor, Wherein the rotor is rotated in the direction of the arrow.

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