Plastic injection mold for producing iron core connecting structure

Abstract

The utility model relates to the field of injection molds, in particular to a plastic injection mold for producing an iron core connecting structure, an iron core comprises a large end part, a small end part and a connecting structure, the large end part and the small end part are formed through turning, the connecting structure is connected between the large end part and the small end part through injection molding, and stepped channels are arranged on the inner sides of the large end part, the connecting structure and the small end part. A kidney-shaped hole communicated with the stepped channel is formed in the side wall of the connecting structure, the mold comprises an upper mold and a lower mold, the upper mold and the lower mold are each internally provided with a large end containing groove, a small end containing groove, a connecting structure containing groove, a water gap containing groove and a core containing groove, and the water gap containing grooves are communicated with the connecting structure containing grooves; according to the plastic injection mold for producing the iron core connecting structure, a plurality of stepped cores can be arranged according to actual requirements, so that not only is the production efficiency improved, but also the large end part, the small end part and the stepped cores can be quickly assembled in the injection molding process, and the time is greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold field, concretely is a plastic injection mold for iron core connecting structure production. BACKGROUND

[0002] Currently, the manufacturing of electromagnetic pump iron cores typically involves turning a single bar into a small end portion, a connecting portion, and a large end portion. The main steps of the process include first machining the large end portion, then fine turning the small end portion, and then machining the connecting portion. For example, in one instance, if the large end portion has a diameter of 14.3 mm and the small end portion has a diameter of 4.3 mm, and a bar having a diameter of 14.5 mm is used as the raw material, the machining of the large end portion is relatively simple and fast, taking only about 10 seconds. However, the machining of the small end portion is much more complex, as it cannot be fed with too much material at once, and the entire process can take up to 50 seconds. In addition, the machining of the connecting portion takes about 15 seconds. Therefore, the entire profile machining takes about 75 seconds. Such a conventional production process not only takes a long time, but also causes a lot of material waste when machining the small end portion and the connecting portion.

[0003] Therefore, we propose a plastic injection mold for iron core connecting structure production to solve the above problems. SUMMARY

[0004] To solve the above technical problems, the utility model provides a plastic injection mold for iron core connecting structure production.

[0005] The plastic injection mold for iron core connecting structure production comprises a large end portion, a small end portion, and a connecting structure, wherein the large end portion and the small end portion are turned into shape, and the connecting structure is injection molded between the large end portion and the small end portion. The inner sides of the large end portion, the connecting structure, and the small end portion are provided with a stepped channel. The side wall of the connecting structure is provided with a waist-shaped hole that communicates with the stepped channel. The upper mold and the lower mold are provided with a large end portion accommodating groove, a small end portion accommodating groove, a connecting structure accommodating groove, a water gap accommodating groove, and a core accommodating groove. The water gap accommodating groove communicates with the connecting structure accommodating groove. The core accommodating groove of the lower mold is provided with a stepped core with magnetism, which cooperates with the stepped channel. The upper mold is provided with an injection port that communicates with the water gap accommodating groove. The connecting structure accommodating groove of the upper mold and the lower mold is provided with a waist-shaped convex portion for forming the waist-shaped hole.

[0006] Preferably, the lower mold is provided with a thimble channel opposite the small end portion accommodating groove, the core accommodating groove, and the water gap accommodating groove.

[0007] Preferably, the bottom of the lower mold is fixed with a column at each corner, the bottom ends of the columns are fixed with a bottom plate, a push plate is slidably connected to the column, a ejector pin is installed on the push plate, and the ejector pin is arranged in an ejector pin channel.

[0008] Preferably, the bottom plate is provided with a relief hole.

[0009] Preferably, the push plate is provided with a mounting hole.

[0010] Compared with the related art, the utility model provides the following beneficial effects:

[0011] The stepped core can be set according to actual requirements, which not only improves the production efficiency, but also enables the large end part, the small end part and the stepped core to be rapidly assembled during the injection molding process, thereby greatly saving time.

[0012] Due to the magnetic attraction, the large end part and the small end part can be tightly adsorbed on the stepped core, thereby avoiding relative movement of the stepped core, the large end part and the small end part during installation into the lower mold, and ensuring rapid installation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole schematic view of the utility model;

[0014] Figure 2 It is a lower mold structure schematic view of the utility model;

[0015] Figure 3 It is an upper mold structure schematic view of the utility model;

[0016] Figure 4 It is a product relative to the lower mold after injection molding schematic view of the utility model;

[0017] Figure 5 It is a push plate structure schematic view of the utility model;

[0018] Figure 6 It is an iron core structure schematic view of the utility model;

[0019] Figure 7 It is an iron core explosion schematic view of the utility model;

[0020] Figure 8 It is a stepped core structure schematic view of the utility model.

[0021] The figure mark: 1, big end part; 2, small end part; 3, connecting structure; 4, stepped channel; 5, waist-shaped hole; 6, upper mould; 7, lower mould; 8, big end part accommodating groove; 9, small end part accommodating groove; 10, connecting structure accommodating groove; 11, water gap accommodating groove; 12, core accommodating groove; 13, stepped core; 14, injection port; 15, waist-shaped convex part; 16, ejector pin channel; 17, column; 18, bottom plate; 19, ejector plate; 20, ejector pin; 21, avoiding through hole; 22, mounting hole. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with the drawings and embodiments.

[0023] Please see Figures 1 to 8 A plastic injection mould for producing iron core connecting structure, which is composed of big end part 1 and small end part 2 formed by turning and connecting structure 3 injected between them. The inner side of big end part 1, connecting structure 3 and small end part 2 is ingeniously designed with stepped channel 4, and the sidewall of connecting structure 3 is provided with waist-shaped hole 5 communicating with stepped channel 4.

[0024] The mould is composed of two parts, upper mould 6 and lower mould 7. The inner side of upper mould 6 and lower mould 7 is carefully laid out with big end part accommodating groove 8, small end part accommodating groove 9, connecting structure accommodating groove 10, water gap accommodating groove 11 and core accommodating groove 12. Especially, water gap accommodating groove 11 communicates with connecting structure accommodating groove 10 to facilitate the flow of material during injection. In the core accommodating groove 12 of lower mould 7, stepped core 13 with magnetism is ingeniously arranged, which perfectly matches with stepped channel 4, ensuring the accurate molding of injection part.

[0025] Injection port 14 communicating with water gap accommodating groove 11 is specially designed in upper mould 6 for injecting plastic material. At the same time, waist-shaped convex part 15 is ingeniously arranged in connecting structure accommodating groove 10 of upper mould 6 and lower mould 7, which will form waist-shaped hole 5 of iron core connecting structure during injection.

[0026] In order to facilitate the demolding of the product after injection, ejector pin channel 16 is specially provided in lower mould 7 according to the position of small end part accommodating groove 9, core accommodating groove 12 and water gap accommodating groove 11. The four corners of the bottom of lower mould 7 are stably installed with columns 17, which jointly support bottom plate 18. Ejector plate 19 is slidingly connected on columns 17, and ejector pins 20 are installed on ejector plate 19, which are accurately arranged in ejector pin channel 16.

[0027] The pushing plate 19 is driven by an external cylinder, the piston rod of the cylinder can drive the pushing plate 19 to move stably, and then the ejector pin 20 moves along the ejector pin channel 16 to smoothly eject the product after injection molding from the mold cavity of the mold. In order to ensure the smooth movement of the piston rod of the cylinder, the bottom plate 18 is specially designed with a avoiding through hole 21. At the same time, the pushing plate 19 is also provided with a mounting hole 22, which is convenient for stable connection with the end flange of the piston rod of the cylinder.

[0028] It is worth mentioning that the stepped core 13 can be set according to actual needs, which not only improves the production efficiency, but also enables the large end part 1, the small end part 2 and the stepped core 13 to be quickly assembled during injection molding, greatly saving time.

[0029] In order to save time and save materials, the iron core is divided into three parts: the large end part 1, the small end part 2 and the connecting structure 3, the large end part 1 and the small end part 2 are processed by turning, and then the large end part 1 and the small end part 2 are placed in the mold to complete injection molding to form the connecting structure 3.

[0030] The specific processing process is as follows: first, the turned large end part 1 and small end part 2 are sleeved on the stepped core 13 with magnetism, and due to the attraction of magnetism, the large end part 1 and the small end part 2 can be tightly adsorbed on the stepped core 13. Then, the assembly is carefully placed in the lower mold 7, and the large end part 1, the small end part 2 and the stepped core 13 are respectively accurately located in the large end part containing groove 8, the small end part containing groove 9 and the core containing groove 12.

[0031] Next, the upper mold 6 and the lower mold 7 are closed. The plastic material is injected into the connecting structure containing groove 10 through the injection port 14, and the connecting structure 3 is formed, so that the large end part 1 and the small end part 2 are firmly connected together. After injection molding, the upper mold 6 is opened, the cylinder drives the pushing plate 19 and the ejector pin 20 to move upward together, and the iron core as a whole and the stepped core 13 are lifted together. Then, the iron core as a whole and the stepped core 13 are separated, and the connecting structure 3 is treated to remove the water port, and finally the perfect iron core connecting structure product is obtained.

[0032] The above only describes the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation according to the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A plastic injection mold for producing a core connecting structure, the core comprising a large end portion (1) and a small end portion (2) formed by turning, and a connecting structure (3) injection-molded between the large end portion (1) and the small end portion (2), the inside of the large end portion (1), the connecting structure (3), and the small end portion (2) being provided with a stepped passage (4), and the side wall of the connecting structure (3) being provided with a waist-shaped hole (5) communicating with the stepped passage (4), characterized in that, The application relates to a mould for manufacturing a stepped core with a magnetic function, which comprises an upper mould (6) and a lower mould (7), the upper mould (6) and the lower mould (7) are internally provided with a large-end accommodating groove (8), a small-end accommodating groove (9), a connecting structure accommodating groove (10), a water gap accommodating groove (11) and a core accommodating groove (12), the water gap accommodating groove (11) is communicated with the connecting structure accommodating groove (10), the core accommodating groove (12) of the lower mould (7) is provided with a stepped core (13) with a magnetic function, the stepped core (13) is matched with a stepped channel (4), the upper mould (6) is internally provided with an injection port (14) communicated with the water gap accommodating groove (11), the connecting structure accommodating groove (10) of the upper mould (6) and the lower mould (7) is internally provided with a waist-shaped convex part (15) for forming a waist-shaped hole (5).

2. The plastic injection mold for producing a core connecting structure according to claim 1, characterized in that, The lower mould (7) is provided with a ejector pin channel (16) opposite to the small-end accommodating groove (9), the core accommodating groove (12) and the water gap accommodating groove (11).

3. The plastic injection mold for producing a core connecting structure according to claim 1, characterized in that, The lower mould (7) is fixed with a stand column (17) at four corners of the bottom, the bottom ends of the stand columns (17) are jointly fixed with a bottom plate (18), the stand columns (17) are slidably connected with a pushing plate (19), the pushing plate (19) is installed with an ejector pin (20), and the ejector pin (20) is arranged in the ejector pin channel (16).

4. The plastic injection mold for manufacturing a core connection structure according to claim 3, characterized in that, The bottom plate (18) is provided with an avoiding through hole (21).

5. The plastic injection mold for manufacturing the core connecting structure according to claim 3, wherein The pushing plate (19) is provided with a mounting hole (22).

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