Iron core with novel structure, manufacturing process and injection mold of iron core

Abstract

The invention relates to the field of iron core machining, in particular to an iron core of a novel structure, a manufacturing process and an injection mold of the iron core, the iron core of the novel structure comprises a large end formed through turning and a small end formed through pulling or turning, a first channel is formed in the inner side of the large end, and a second channel is formed in the small end. A connecting part is connected between the large end and the small end through injection molding, a third channel is formed in the connecting part, the third channel, the second channel and the first channel are communicated, and kidney-shaped hole films communicated with the third channel are symmetrically arranged on the side wall of the connecting part. The machining process combining turning and injection molding greatly shortens the production cycle and improves the production efficiency. And the small end part can be firstly processed and formed by using a proper bar material or a pipe material, so that materials and time which are possibly wasted in the traditional process are saved.

Description

Technical Field

[0001] The invention relates to the field of iron core processing, in particular to an iron core with a new structure, a manufacturing process and an injection mold thereof. Background Art

[0002] At present, the manufacture of electromagnetic pump core usually uses a bar material to turn into a small end, a connecting part and a large end. The main steps of the processing include: first processing the large end, then fine turning the small end, and then processing the connecting part. For example, in one example, if the diameter of the large end is φ14.3 mm, the diameter of the small end is φ4.3 mm, and a bar material with a diameter of φ14.5 mm is used as the raw material, then processing the large end is relatively simple and quick, taking only about 10 seconds; however, processing the small end is much more complicated, and since too much material cannot be fed at one time, the whole process may take nearly 50 seconds. In addition, processing the connecting part takes about 15 seconds. Therefore, it takes about 75 seconds to complete the entire shape processing. Such a traditional production process not only takes a long processing time, but also causes a lot of material waste when processing the small end and the connecting part.

[0003] The existing injection mold design is inconvenient in operating core pulling and ejection.

[0004] Therefore, we propose a new structural core, a manufacturing process and an injection mold thereof to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a new type of structural iron core, including a large end formed by turning and a small end formed by drawing or turning, the large end and the small end are independent of each other, a first channel is provided on the inner side of the large end, a second channel is provided inside the small end, a connecting part is connected between the large end and the small end by injection molding, a third channel is provided inside the connecting part, and the third channel, the second channel and the first channel are connected, and the side wall of the connecting part is symmetrically provided with waist-shaped holes connected to the third channel.

[0006] Preferably, a fixing structure is integrally provided at one end of the outer side wall of the small end portion, and the fixing structure is located inside the connecting portion.

[0007] Preferably, one end of the connecting portion away from the small end is embedded and fixed in the large end.

[0008] Preferably, the outer diameter of the large end portion is larger than the outer diameter of the connecting portion, and the outer diameter of the connecting portion is larger than the outer diameter of the small end portion.

[0009] Preferably, the inner diameter of the large end portion is larger than the inner diameter of the connecting portion, and the inner diameter of the connecting portion is larger than the inner diameter of the small end portion.

[0010] The present invention provides a novel structure iron core manufacturing process, comprising the following steps:

[0011] S1. Turning of large end:

[0012] The large end is formed by lathe turning using suitable soft magnetic bar stock;

[0013] S2. Turning of small end:

[0014] The small end is formed by lathe turning using suitable bar stock, and the turning of the small end is carried out simultaneously with the turning of the large end;

[0015] S3. The large end, small end and connecting part are injection molded into a whole:

[0016] The small end and the large end are placed in a mold, and after the mold is closed, injection molding is performed to connect the large end and the small end into a whole, and the injection molding part between the large end and the small end is the connecting part.

[0017] The present invention provides an injection mold for producing a new type of structural iron core, including an upper mold and a lower mold, wherein the upper mold and the lower mold are both provided with a large end accommodating groove, a small end accommodating groove, a connecting part forming groove and a sprue groove, and the sprue groove is connected with the connecting part forming groove, the connecting part forming groove is provided with a waist-shaped convex portion for forming a waist-shaped hole, the upper mold is provided with an injection port connected with the sprue groove, the lower mold is provided with a stepped mold core for cooperating with the inner wall of the new type of structural iron core, the lower mold is provided with a driving component for driving the stepped mold core to move, and the upper mold is provided with an execution structure for driving the driving component to move.

[0018] Preferably, the driving assembly includes a trapezoidal plate slidably connected in the upper mold, the trapezoidal plate is fixedly connected to the step mold core, the top of the trapezoidal plate is provided with a first inclined portion, the bottom of the trapezoidal plate is fixed with an ear plate, a telescopic rod is installed between the ear plate and the lower mold, the outer side of the telescopic rod is provided with a first return spring, the two ends of the first return spring are respectively in contact with the ear plate and the lower mold, and the execution structure includes a vertical plate fixed to the bottom of the upper mold, triangular portions are symmetrically fixed on the vertical plate, and a second inclined portion in contact with the first inclined portion is provided on the triangular portion.

[0019] Preferably, columns are fixed at the four corners of the bottom of the lower mold, the bottom ends of the columns are commonly fixedly connected to the bottom plate, the four columns are commonly fixedly connected to the fixing plate, a plurality of ejectors are slidably connected to the inside of the lower mold, a blocking portion is fixed to the outside of the ejector, the blocking portion is in contact with the top of the fixing plate, a second return spring is sleeved on the outside of the ejector, the two ends of the second return spring are respectively in contact with the blocking portion and the bottom of the lower mold, a push plate is fixed to the bottom of the vertical plate, the push plate is slidably connected to the column, and the bottom end of the ejector is provided with an extrusion portion that cooperates with the push plate.

[0020] Preferably, the ejector pin is arranged opposite to the large end receiving groove, the small end receiving groove and the water outlet groove, and the vertical plate is slidably connected to the fixed plate.

[0021] Beneficial effects:

[0022] Processing efficiency and cost control:

[0023] The processing technology combining turning and injection molding greatly shortens the production cycle and improves production efficiency.

[0024] The small end can be first processed and formed using suitable rod or tube materials, saving materials and time that may be wasted in traditional processes.

[0025] The design of the stepped mold core enables the sealing of the inner side of the large end and the small end as well as the molding of the connecting part to be completed in one injection molding process, further reducing the processing cost.

[0026] Operational convenience and product removal:

[0027] The mold closing and mold opening processes are designed to be very simple, and the step mold core can be easily moved by moving the mold and the action of the first return spring.

[0028] The design of the ejector pin and push plate allows the molded product to be easily removed from the mold, avoiding the difficulty in removing it in the traditional way. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the new structure iron core of the present invention;

[0030] Figure 2 This is a schematic diagram of the explosion of the new structure iron core of the present invention;

[0031] Figure 3 This is a schematic diagram of the overall structure of the injection mold of the present invention;

[0032] Figure 4 It is a schematic diagram of the upper mold structure of the present invention;

[0033] Figure 5 It is a schematic diagram of the lower mold structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the trapezoidal plate structure of the present invention;

[0035] Figure 7 It is a schematic diagram of the vertical plate structure of the present invention;

[0036] Figure 8 It is a front view of the injection mold of the present invention;

[0037] Fig. 9 It is a schematic diagram of the position of the iron core of the novel structure after the injection molding of the present invention is completed;

[0038] Fig.10 It is a schematic diagram of the stepped mold core structure of the present invention.

[0039] Numbers in the figure: 1. large end; 2. small end; 3. first channel; 4. second channel; 5. connecting part; 6. third channel; 7. waist-shaped hole; 8. fixing structure; 9. upper mold; 10. lower mold; 11. large end accommodating groove; 12. small end accommodating groove; 13. connecting part forming groove; 14. sprue groove; 15. waist-shaped convex part; 16. injection port; 17. stepped mold core; 18. trapezoidal plate; 19. first inclined part; 20. ear plate; 21. telescopic rod; 22. first return spring; 23. vertical plate; 24. triangular part; 25. second inclined part; 26. column; 27. bottom plate; 28. fixing plate; 29. ​​ejector pin; 30. blocking part; 31. second return spring; 32. push plate; 33. extrusion part. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0041] Please refer to Figure 1 to Figure 2 A new type of structural iron core includes a large end portion 1 formed by turning and a small end portion 2 formed by drawing or turning. The large end portion 1 and the small end portion 2 are independent of each other. A first channel 3 is cleverly designed on the inner side of the large end portion 1, and a second channel 4 is provided inside the small end portion 2. The two parts are connected to a connecting portion 5 by injection molding, and a third channel 6 is provided inside the connecting portion 5. This design ensures smooth communication between the third channel 6, the second channel 4 and the first channel 3. On the side wall of the connecting portion 5, waist-shaped holes 7 connected to the third channel 6 are symmetrically opened. This step usually needs to rely on a machining center to complete in traditional processing methods, but it is implemented in a more streamlined and efficient manner in this new structure.

[0042] It is particularly worth mentioning that a fixing structure 8 is integrally extended from one end of the outer wall of the small end portion 2. This design not only enhances the connection stability between the small end portion 2 and the connecting portion 5, but also increases the contact area between them. The fixing structure 8 is cleverly located inside the connecting portion 5, providing additional stability for the overall structure.

[0043] The end of the connecting part 5 away from the small end 2 is embedded in the large end 1, and this design makes the overall structure more compact and stable. From the perspective of appearance size, the outer diameter of the large end 1 is larger than the outer diameter of the connecting part 5, and the outer diameter of the connecting part 5 is larger than the outer diameter of the small end 2. Such a stepped design not only facilitates the precise positioning of the large end 1 and the small end 2 in the injection mold, but also gives the iron core more abundant functions and forms.

[0044] Similarly, the inner diameter is carefully designed: the inner diameter of the large end 1 is larger than the inner diameter of the connecting part 5, and the inner diameter of the connecting part 5 is larger than the inner diameter of the small end 2. This design enables a stepped mold core 17 to simultaneously complete the blocking of the inner sides of the large end 1 and the small end 2 and the molding of the connecting part 5 during the injection molding process, greatly improving production efficiency and processing accuracy.

[0045] A novel structure core manufacturing process comprises the following steps:

[0046] S1. Turning of large end 1:

[0047] The large end 1 is formed by lathe turning using a suitable (appropriate thickness, not too thick or too thin) soft magnetic bar;

[0048] S2. Turning of small end 2:

[0049] The small end 2 is formed by turning a suitable (appropriate thickness, not too thick or too thin) bar material on a lathe, and the turning of the small end 2 is performed synchronously with the turning of the large end 1;

[0050] S3. The large end 1, the small end 2 and the connecting part 5 are injection molded into a whole:

[0051] The small end portion 2 and the large end portion 1 are placed in a mold, and after the mold is closed, injection molding is performed to connect the large end portion 1 and the small end portion 2 into a whole, and the injection molding portion between the large end portion 1 and the small end portion 2 is the connecting portion 5.

[0052] The technical solution of the present invention is to divide the iron core into three parts: a large end 1, a small end 2 and a connecting part 5. The processing technology is as follows: the small end 2 can be first processed and formed using suitable rods or tubes, saving materials and time wasted in traditional processes; the large end 1 is also processed and formed using suitable soft magnet rods, the processing accuracy can be relaxed and the processing time can be reduced; the connecting part 5 is relatively complex and is determined by the mold. This mold can be made of plastic injection molding, and the small end 2 and the large end 1 are placed in the mold. After the mold is closed, injection molding is performed to connect the two into a whole.

[0053] Please refer to Figures 3 to 10A new type of injection mold for making a structural iron core includes an upper mold 9 and a lower mold 10, both of which are provided with a large end receiving groove 11, a small end receiving groove 12, a connecting portion forming groove 13 and a nozzle groove 14. The nozzle groove 14 is connected with the connecting portion forming groove 13 to ensure smooth flow of the injection liquid. The connecting portion forming groove 13 is also specially provided with a waist-shaped protrusion 15 for forming a waist-shaped hole 7. The upper mold 9 is provided with an injection port 16 connected with the nozzle groove 14 to facilitate the injection of the injection liquid.

[0054] In the lower die 10, we installed a step die core 17 for cooperating with the inner wall of the new structure iron core. In order to ensure the precise movement of the step die core 17, we also designed a drive assembly and an execution structure.

[0055] The driving assembly includes a trapezoidal plate 18 slidably connected in the upper mold 9, the trapezoidal plate 18 is fixedly connected to the step mold core 17, a first inclined portion 19 is provided on the top of the trapezoidal plate 18, an ear plate 20 is fixed to the bottom of the trapezoidal plate 18, a telescopic rod 21 is installed between the ear plate 20 and the lower mold 10, a first return spring 22 is sleeved on the outer side of the telescopic rod 21, and the two ends of the first return spring 22 are in contact with the ear plate 20 and the lower mold 10 respectively, and the execution structure includes a vertical plate 23 fixed to the bottom of the upper mold 9, triangular portions 24 are symmetrically fixed on the vertical plate 23, and a second inclined portion 25 in contact with the first inclined portion 19 is provided on the triangular portion 24.

[0056] The four corners of the bottom of the lower mold 10 are fixed with columns 26 to facilitate the stable installation of the mold; and the bottom ends of the columns 26 are fixedly connected to a bottom plate 27. The four columns 26 are also fixedly connected to a fixed plate 28 to further reinforce and position the mold. We also slidably connect several ejectors 29 inside the lower mold 10 to eject the product from the mold after the injection molding is completed. The outer side of the ejector 29 is fixed with a blocking part 30 to prevent it from sliding excessively; and the blocking part 30 is in contact with the top of the fixed plate 28 to ensure its stable position. The outer side of the ejector 29 is also sleeved with a second return spring 31 to facilitate its reset. The two ends of the second return spring 31 are in contact with the blocking part 30 and the bottom of the lower mold 10 respectively. The bottom of the vertical plate 23 is fixed with a push plate 32, and the push plate 32 is slidably connected to the column 26. The bottom end of the ejector 29 is provided with an extrusion part 33 that cooperates with the push plate 32.

[0057] The ejector pin 29 is disposed opposite to the large end receiving groove 11 , the small end receiving groove 12 and the nozzle groove 14 , and the vertical plate 23 is slidably connected to the fixed plate 28 .

[0058] Injection molding process:

[0059] Mold closing process: First, the large end portion 1 and the small end portion 2 are placed in the large end portion accommodating groove 11 and the small end portion accommodating groove 12 in the lower mold 10. Then, the upper mold 9 moves downward to make the second inclined portion 25 squeeze the first inclined portion 19, the first return spring 2 is compressed, and the stepped mold core 17 is inserted into the large end portion 1 and the small end portion 2 in turn, and the inner walls of the large end portion 1 and the small end portion 2 are blocked. When the upper mold 9 and the lower mold 10 are molded, the connecting portion forming groove 13 of the upper mold 9 and the connecting portion forming groove 13 of the lower mold 10 and the stepped mold core 17 form a connecting portion mold cavity, which is injected through the injection port 16. The injection liquid enters the interior of the connecting portion mold cavity along the injection port 16 and the sprue groove 14, and the connecting portion 5 is formed by injection, so that the connecting portion 5, the large end portion 1 and the small end portion 2 form a whole:

[0060] Mold opening process: the upper mold 9 moves upward, and the second inclined portion 25 also moves upward. Under the action of the first return spring 22, the step mold core 17 and the trapezoidal plate 18 move together, and the step mold core 17 moves out of the new structural iron core. When the vertical plate 23 drives the push plate 32 to move upward together, when the push plate 32 contacts the extrusion portion 33, the push plate 32 squeezes the ejector pin 29, and the ejector pin 29 lifts the large end 1, the small end 2 and the water outlet together, making it convenient to take the injection molded product out of the mold.

[0061] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of structural iron core, characterized in that: The invention comprises a large end portion (1) formed by turning and a small end portion (2) formed by drawing or turning, wherein the large end portion (1) and the small end portion (2) are independent of each other, a first channel (3) is provided on the inner side of the large end portion (1), a second channel (4) is provided inside the small end portion (2), a connecting portion (5) is connected between the large end portion (1) and the small end portion (2) by injection molding, a third channel (6) is provided inside the connecting portion (5), and the third channel (6), the second channel (4) and the first channel (3) are connected, and a waist-shaped hole (7) connected to the third channel (6) is symmetrically provided on the side wall of the connecting portion (5).

2. A new type of structural iron core according to claim 1, characterized in that: A fixing structure (8) is integrally provided at one end of the outer side wall of the small end portion (2), and the fixing structure (8) is located inside the connecting portion (5).

3. A new type of structural iron core according to claim 1, characterized in that: The end of the connecting portion (5) away from the small end portion (2) is embedded and fixed in the large end portion (1).

4. A new structural core according to claim 1, characterized in that: The outer diameter of the large end portion (1) is greater than the outer diameter of the connecting portion (5), and the outer diameter of the connecting portion (5) is greater than the outer diameter of the small end portion (2).

5. The new structural iron core according to claim 1, characterized in that: The inner diameter of the large end portion (1) is larger than the inner diameter of the connecting portion (5), and the inner diameter of the connecting portion (5) is larger than the inner diameter of the small end portion (2).

6. A process for manufacturing a new type of structural iron core according to any one of claims 1 to 5, characterized in that: The steps include: S1. Turning of the large end (1): The large end (1) is formed by lathe turning using suitable soft magnetic bar stock; S2. Turning of small end (2): The small end portion (2) is formed by lathe turning using a suitable bar stock, and the turning of the small end portion (2) is performed simultaneously with the turning of the large end portion (1); S3. The large end (1), the small end (2) and the connecting part (5) are injection molded into a whole: The small end portion (2) and the large end portion (1) are placed in a mold, and after the mold is closed, injection molding is performed to connect the large end portion (1) and the small end portion (2) into a whole, and the injection molding portion between the large end portion (1) and the small end portion (2) is the connecting portion (5).

7. An injection mold used in the novel structure core manufacturing process according to claim 6, comprising an upper mold (9) and a lower mold (10), characterized in that: The upper mold (9) and the lower mold (10) are both provided with a large end accommodating groove (11), a small end accommodating groove (12), a connecting portion forming groove (13) and a nozzle groove (14), and the nozzle groove (14) is connected to the connecting portion forming groove (13), and the connecting portion forming groove (13) is provided with a waist-shaped protrusion (15) for forming a waist-shaped hole (7), and the upper mold (9) is provided with an injection port (16) connected to the nozzle groove (14), and the lower mold (10) is installed with a stepped mold core (17) for matching with the inner wall of the new structure iron core, and the lower mold (10) is installed with a driving component for driving the stepped mold core (17) to move, and the upper mold (9) is installed with an execution structure for driving the driving component to move.

8. The new structure iron core injection mold according to claim 7, characterized in that: The driving assembly comprises a trapezoidal plate (18) slidably connected in the upper mold (9), the trapezoidal plate (18) is fixedly connected to the step mold core (17), a first inclined portion (19) is provided at the top of the trapezoidal plate (18), an ear plate (20) is fixed at the bottom of the trapezoidal plate (18), a telescopic rod (21) is installed between the ear plate (20) and the lower mold (10), a first return spring (22) is sleeved on the outer side of the telescopic rod (21), and two ends of the first return spring (22) are respectively in contact with the ear plate (20) and the lower mold (10), and the execution structure comprises a vertical plate (23) fixed at the bottom of the upper mold (9), a triangular portion (24) is symmetrically fixed on the vertical plate (23), and a second inclined portion (25) in contact with the first inclined portion (19) is provided on the triangular portion (24).

9. The new structure iron core injection mold according to claim 8, characterized in that: The four corners of the bottom of the lower mold (10) are fixed with columns (26), the bottom ends of the columns (26) are commonly fixedly connected to a bottom plate (27), and the four columns (26) are commonly fixedly connected to a fixed plate (28). A plurality of ejector pins (29) are slidably connected inside the lower mold (10), and a blocking portion (30) is fixed to the outer side of the ejector pin (29), and the blocking portion (30) is in contact with the top of the fixed plate (28). A second return spring (31) is sleeved on the outer side of the ejector pin (29), and the two ends of the second return spring (31) are in contact with the blocking portion (30) and the bottom of the lower mold (10) respectively. A push plate (32) is fixed to the bottom of the vertical plate (23), and the push plate (32) is slidably connected to the column (26). The bottom end of the ejector pin (29) is provided with an extrusion portion (33) that cooperates with the push plate (32).

10. The new structure iron core injection mold according to claim 8, characterized in that: The ejector pin (29) is arranged opposite to the large end receiving groove (11), the small end receiving groove (12) and the water inlet groove (14), and the vertical plate (23) is slidably connected to the fixed plate (28).

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