CN114102971A

CN114102971A - Injection mold of magnetic ring subassembly

Info

Publication number: CN114102971A
Application number: CN202111175552.2A
Authority: CN
Inventors: 陈红方
Original assignee: NINGBO WANSHENG INDUSTRIAL CO LTD
Current assignee: NINGBO WANSHENG INDUSTRIAL CO LTD
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-03-01

Abstract

The invention relates to the technical field of injection molding processing, in particular to an injection mold of a magnetic ring assembly, which comprises a lower mold and an upper mold, wherein the lower mold is provided with two magnetic ring injection lower mold cavities and a bushing injection lower mold cavity, the lower part of the upper mold is provided with a magnetic ring injection upper mold cavity corresponding to the magnetic ring injection lower mold cavity and a bushing injection upper mold cavity corresponding to the bushing injection lower mold cavity, injection gates which vertically and upwards penetrate through the upper mold are respectively arranged on the magnetic ring injection upper mold cavity and the bushing injection upper mold cavity of the upper mold, the injection gates are used for connecting injection molding base material conveying equipment, and cooling water channels for quickly cooling and molding the magnetic rings and the bushings are arranged on the lower mold and the upper mold.

Description

Injection mold of magnetic ring subassembly

Technical Field

The invention relates to the technical field of injection molding, in particular to an injection mold of a magnetic ring guide assembly.

Background

For electronic products, in order to protect internal parts, injection molded articles used as housings are required to have a certain rigidity; particularly for some product assemblies, the parts are connected into a whole by injection molding and have certain rigidity.

For a magnetic conduction ring assembly in a non-contact hall type torque sensor, the existing manufacturing method of the magnetic conduction ring assembly is also formed by injection molding, wherein the magnetic conduction ring assembly is positioned by arranging a guide pillar on a lower die assembly and arranging a positioning hole on the magnetic conduction ring, and the magnetic conduction ring is positioned by matching the positioning hole with the guide pillar, and the manufacturing method has the following defects:

1. because the teeth of the upper and lower magnetic conductive rings are oppositely arranged, the magnetic conductive rings are positioned by matching the positioning holes with the guide pillars, only one positioning in the vertical direction between the upper and lower magnetic conductive rings is performed, and the teeth of the upper and lower magnetic conductive rings are relatively occluded when the upper and lower magnetic conductive rings are oppositely arranged, the positioning method cannot ensure the accuracy of the alignment of the teeth of the upper and lower magnetic conductive rings, thereby affecting the performance of the product.

2. In order to realize the positioning between the upper magnetic conduction ring and the lower magnetic conduction ring, the positioning holes are arranged on the magnetic conduction rings, so that the magnetic conduction paths on the magnetic conduction rings are blocked, the magnetic field is distributed unevenly, and the magnetic field induction effect is influenced; and at the locating hole department, mechanical strength is also lower, and the little deformation that can produce when here receives the stress effect will cause the magnetic circuit to open circuit, has influenced the effect of magnetic field response to the uniformity and the reliability of sensor have been reduced, greatly reduced the accuracy of sensor transmission signal.

Chinese patent application No. CN201310288419.7 discloses an injection mold of magnetic conduction ring subassembly, include lower mould subassembly and go up the mould subassembly and positioning mechanism who is equipped with on the lower mould subassembly, the lower mould subassembly includes the plug that is equipped with on lower mould, the lower mould and the guider that the laminating plug set up, it includes the mould and locates the runner of moulding plastics on the mould to go up the mould subassembly.

But only can pay attention to a piece of magnetic conduction ring and a bush once when using this mould to carry out the moulding plastics of magnetic conduction ring subassembly, be not conform to the assembly quantity of magnetic conduction ring subassembly, influence the efficiency of production.

Disclosure of Invention

Based on this, it is necessary to provide an injection mold of magnetic conduction ring subassembly to aim at prior art problem, and this technical scheme has solved how to accomplish the part of whole magnetic conduction ring subassemblies in once production and has moulded plastics and improve production efficiency's technical problem.

In order to solve the problems of the prior art, the invention adopts the technical scheme that: an injection mold of a magnetic ring component is formed by combining two magnetic rings and a bush, the injection mold comprises a lower mold and an upper mold, two magnetic ring injection lower mold cavities and a bush injection lower mold cavity are arranged on the lower mold, the magnetic ring injection lower mold cavities and the bush injection lower mold cavities are arranged in parallel, a magnetic ring injection upper mold cavity corresponding to the magnetic ring injection lower mold cavity and a bush injection upper mold cavity corresponding to the bush injection lower mold cavity are arranged below the upper mold, the central axis of the magnetic ring injection lower mold cavity and the central axis of the magnetic ring injection upper mold cavity are on the same straight line, the central axis of the bush injection lower mold cavity and the central axis of the bush injection upper mold cavity are on the same straight line, and injection gates which vertically penetrate through the upper mold are respectively arranged on the magnetic ring injection upper mold cavity and the bush injection upper mold cavity of the upper mold, the injection molding sprue is used for connecting injection molding base material conveying equipment, and cooling water channels for rapid cooling and forming of the magnetic conduction rings and the bushings are arranged on the lower die and the upper die.

Preferably, the lower magnetic ring injection molding cavity of the lower mold comprises a protruding column protruding out of the upper surface of the lower mold, the size of the lower magnetic ring injection molding cavity is matched with the size of the inner wall of the magnetic ring, the height of the protruding column is the same as the height of the upper magnetic ring injection molding cavity of the upper mold, the inner wall of the upper magnetic ring injection molding cavity is larger than the size of the outer ring of the magnetic ring, a plurality of arc-shaped convex blocks are arranged around the circumferential side of the protruding column at equal intervals, the size of each arc-shaped convex block corresponds to the inner opening of the magnetic ring, a tooth socket which is sunken downwards is arranged between every two adjacent arc-shaped convex blocks, and the shape and the size of the tooth socket are matched with the tooth part of the magnetic ring.

Preferably, two sides of the lower magnetic ring injection molding die cavity are provided with outer limit dies, each outer limit die comprises two arc butt-joint blocks with opposite openings, the inner wall size of each arc butt-joint block is identical with the outer size of a magnetic ring, the outer wall size of each arc butt-joint block is identical with the inner wall size of the upper magnetic ring injection molding die cavity of the upper die, the height of each arc butt-joint block is identical with that of each convex column, each arc butt-joint block is installed on each sliding block, the sliding blocks are oppositely arranged on two sides of the lower magnetic ring injection molding die cavity, and the outer limit dies on one side of the lower die are fixedly connected through connecting blocks.

Preferably, the two sides of the lower magnetic ring injection molding cavity of the lower mold are provided with limiting grooves, the limiting grooves are arranged on the side surface perpendicular to the lower mold and extend towards the direction of the central axis of the lower magnetic ring injection molding cavity, the limiting grooves are used for limiting and installing a sliding block of the outer limiting mold, and the upper surface of the sliding block is flush with the upper surface of the lower mold.

Preferably, one side of the slider towards the injection molding lower die cavity of the magnetic conduction ring is provided with an adsorption magnet, and the adsorption magnet is used for adsorbing the inner wall of the limiting groove.

Preferably, the size of a lower mold cavity of the lower mold for bushing injection molding is matched with that of the bushing, a plurality of clamping blocks are arranged at the bottom of the lower mold cavity for bushing injection molding, and the clamping blocks are used for forming gaps of the bushing.

Preferably, the cooling water course includes first pipeline and second pipeline, first pipeline level link through bed die and last mould, first pipeline sets up at magnetic ring injection moulding bed die cavity, bush injection moulding bed die cavity, the both sides of magnetic ring injection moulding bed die cavity and bush injection moulding bed die cavity, the second pipeline sets up inside the bed die, the extending direction of second pipeline gets into the inside of magnetic ring injection moulding bed die cavity and bush injection moulding bed die cavity, coolant conveying equipment is connected with the one end of second pipeline to first pipeline, coolant recovery plant is connected with the other end of second pipeline to first pipeline.

Preferably, the vertex angle department of lower mould is provided with the guide bar that extends towards the top, and the vertex angle department of going up the mould is provided with the die assembling hole, and the spacing cartridge of guide bar is in the die assembling hole, and the guide bar is identical with the size in die assembling hole.

Preferably, the upper die is provided with a plurality of air passages, the air passages vertically extend to penetrate through the upper die, the air passages are respectively arranged in the magnetic ring injection upper die cavity and the bushing injection upper die cavity, and the outer ends of the air passages are connected with air supply equipment.

Preferably, the upper end of the injection gate of the upper mold is provided with a tapered opening, and the tapered opening forms a channel which gradually narrows from top to bottom on the injection gate.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, two magnetic ring injection mold cavities and one lining injection mold cavity formed by closing the lower mold and the upper mold can realize all components required by one group of magnetic ring components in one-step processing, so that the magnetic ring components can be conveniently and directly assembled after injection molding.

2. The invention realizes the injection molding of the magnetic conductive ring by the coaxially arranged magnetic conductive ring injection molding lower die cavity and the magnetic conductive ring injection molding upper die cavity, can effectively ensure the size of the injection molded magnetic conductive ring, and simultaneously can facilitate the workers to take out the molded magnetic conductive ring when the lower die and the upper die are separated, thereby realizing the rapid blanking.

3. According to the invention, the periphery of the lower magnetic ring injection molding die cavity is wrapped by the movable outer edge limiting dies arranged on the two sides of the lower magnetic ring injection molding die cavity to realize external limiting of the magnetic ring, so that the problem that the magnetic ring which is not completely formed after the lower die and the upper die are separated is easily deformed during molding because no support is provided on the outer part of the circular ring part on the lower die.

4. The limiting grooves arranged on the two sides of the magnetic ring injection lower die cavity are used for limiting and inserting the sliding blocks of the outer limiting die to ensure that the arc-shaped butt-joint blocks on the two sides stably move to form a finished circular ring and ensure that the central axis of the circular ring and the axis of the magnetic ring injection lower die cavity are on the same straight line.

5. According to the invention, the adsorption magnet is arranged on one side of the lower magnetic ring injection molding die cavity, so that certain pressure can be generated when the arc butt-joint blocks are in butt joint, the butt joint state of the arc butt-joint blocks is ensured, and the die assembly of the lower magnetic ring injection molding die cavity and the upper magnetic ring injection molding die cavity is facilitated.

6. According to the invention, the bottom of the bushing injection molding lower die cavity is provided with the plurality of clamping blocks to form the notch part of the bushing, so that the injection molded bushing is ensured to reach a machining shape conforming to the reality.

7. According to the invention, the effects of reducing the surface temperature of the injection molding part on the inner side and the outer side and accelerating the molding are achieved through the first pipeline arranged in the lower die and the upper die and the second pipeline extending the path through the lower magnetic ring injection molding die cavity and the lower bushing injection molding die cavity.

8. According to the invention, the upper die is limited by inserting the die closing hole on the guide rod of the lower die, and the moving path of the upper die is ensured to be stable, so that the magnetic ring injection lower die cavity and the bush injection lower die cavity are realized when the lower die and the upper die are closed, and the axial butt joint of the magnetic ring injection upper die cavity and the bush injection upper die cavity is stable.

9. According to the invention, after injection molding is finished, when the lower mold and the upper mold are separated, gas is provided for the injection upper mold cavity of the magnetic guide ring and the injection upper mold cavity of the bushing, so that thrust is generated on an injection molding piece, and the injection molding piece is convenient to separate from the residual part in the injection gate.

10. According to the invention, the problem of difficulty in adding injection molding base materials is solved by arranging the tapered opening which is gradually narrowed from top to bottom at the top of the injection molding sprue, so that the smaller injection molding sprue is remained on the injection molding part on the surfaces of the magnetic conduction ring and the bushing, and the subsequent fine processing is facilitated.

Drawings

Fig. 1 is a perspective view of an embodiment of a magnetic permeable ring assembly;

FIG. 2 is a perspective view of the embodiment;

FIG. 3 is an exploded perspective view of the embodiment from a first perspective;

FIG. 4 is an exploded perspective view of the embodiment from a second perspective;

FIG. 5 is a top view of the lower die and the outer edge limiting die of the embodiment;

FIG. 6 is a first perspective view of a lower mold of the embodiment;

FIG. 7 is a second perspective view of the lower mold of the embodiment;

FIG. 8 is a front view of the lower mold of the embodiment;

FIG. 9 is a cross-sectional view taken at A-A of FIG. 8;

FIG. 10 is a cross-sectional view taken at B-B of FIG. 8;

FIG. 11 is a first perspective view of the upper mold of the embodiment;

FIG. 12 is a top view of the upper mold of the embodiment;

FIG. 13 is a cross-sectional view taken at C-C of FIG. 12;

FIG. 14 is a second perspective view of the upper mold of the embodiment;

FIG. 15 is a perspective view of an outer edge restraining die of an embodiment;

the reference numbers in the figures are:

1-a magnetic conductive ring;

2-a bushing;

3-lower mould; 3 a-a lower die cavity for injection molding of the magnetic conductive ring; 3a 1-boss; 3a 2-arc shaped projection; 3a 3-gullet; 3 b-a liner injection molding lower mold cavity; 3b 1-cartridge; 3 c-a limiting groove; 3 d-a guide bar;

4, mounting a mold; 4 a-the magnetic conduction ring is injected into an upper die cavity; 4 b-injection molding the bushing into an upper mold cavity; 4 c-injection molding sprue; 4c 1-cone; 4 d-die closing holes; 4 e-airway;

5-cooling water channels; 5 a-a first conduit; 5 b-a second conduit;

6-limiting the die outside; 6 a-an arc butt-joint block; 6 b-a slide block; 6b 1-attracting magnet; 6 c-connecting block.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 4: the utility model provides an injection mold of magnetic ring subassembly, the magnetic ring subassembly is formed by two magnetic rings 1 and a bush 2 combination, injection mold includes lower mould 3 and mould 4, is provided with two magnetic rings on the lower mould 3 and moulds plastics lower die cavity 3a and a bush and mould plastics lower die cavity 3b, and magnetic rings mould plastics lower die cavity 3a and bush mould plastics lower die cavity 3b parallel arrangement, and the below of going up mould 4 is provided with the magnetic rings mould plastics upper die cavity 4a corresponding with magnetic rings mould plastics lower die cavity 3a and mould plastics upper die cavity 4b with bush mould plastics lower die cavity 3b corresponding, and the central axis of magnetic rings mould plastics lower die cavity 3a and the central axis of magnetic rings mould plastics upper die cavity 4a are in the same straight line, and the central axis of bush mould plastics lower die cavity 3b and the central axis of bush mould plastics upper die cavity 4b are in the same straight line, set up respectively on the magnetic rings mould 4a of going through from vertical upwards on the mould 4b with moulding plastics the upper die cavity 4b 4, injection moulding runner 4c is used for connecting the base material conveying equipment that moulds plastics, be provided with on lower mould 3 and the last mould 4 and be used for the fashioned cooling water course 5 of magnetic ring 1 and 2 rapid cooling of bush.

Based on the above embodiment, as shown in fig. 1, the magnetic conductive ring assembly is formed by splicing two magnetic conductive rings 1 and a bushing 2, two magnetic conductive ring injection molding cavities and a bushing injection molding cavity arranged between a lower mold 3 and an upper mold 4 can realize all components required by a group of magnetic conductive ring assemblies in one-step processing, so as to facilitate direct assembly of the magnetic conductive ring assemblies after injection molding, the magnetic conductive ring injection molding cavity is formed by a magnetic conductive ring injection lower mold cavity 3a arranged on the lower mold 3 of 0 and a magnetic conductive ring injection upper mold cavity 4a corresponding to the lower part of the upper mold 4, when the lower mold 3 and the upper mold 4 are in a mold closing state, the magnetic conductive ring injection lower mold cavity 3a and the magnetic conductive ring injection upper mold cavity 4a form an injection mold cavity conforming to the shape of the magnetic conductive rings, an injection gate 4c is arranged on the magnetic conductive ring injection upper mold cavity 4a, the injection gate 4c upwards penetrates through the upper mold 4, conveniently connect the basic material conveying equipment of moulding plastics in the upper end of last mould 4, go up mould 4 and can not cause too big influence to the basic material conveying equipment of moulding plastics and the junction of runner 4c of moulding plastics when carrying out compound die and branch mould with bed die 3, equally, when bed die 3 and last mould 4 are in the compound die state, the bush mould plastics down die cavity 3b and bush mould plastics and go up die cavity 4b and form the injection mold die cavity that accords with the bush shape, it connects the basic material conveying equipment of moulding plastics to be provided with runner 4c of moulding plastics on the bush mould moulds plastics and is provided with cooling water course 5 on bed die 3 and the last mould 4 respectively, cooling water course 5 can make things convenient for the coolant liquid to get into and carry out quick even cooling to the magnetic ring subassembly of the completion of moulding plastics in bed die 3 and the last mould 4 is inside, reduce the required time of natural cooling shaping, improve magnetic ring subassembly injection moulding's efficiency.

Further, in order to solve the problem of how the magnetic ring injection lower cavity 3a and the magnetic ring injection upper cavity 4a form an injection cavity conforming to the shape of the magnetic ring, as shown in fig. 5 and 6: the lower magnetic ring injection molding die cavity 3a of the lower die 3 comprises a convex column 3a1 protruding out of the upper surface of the lower die 3, the size of the lower magnetic ring injection molding die cavity 3a is matched with the size of the inner wall of the magnetic ring 1, the height of the convex column 3a1 is the same as that of the upper magnetic ring injection molding die cavity 4a of the upper die 4, the inner wall of the upper magnetic ring injection molding die cavity 4a is larger than the size of the outer ring of the magnetic ring 1, a plurality of arc-shaped convex blocks 3a2 are arranged around the periphery of the convex column 3a1 at equal intervals, the size of each arc-shaped convex block 3a2 corresponds to the inner opening of the magnetic ring 1, a tooth socket 3a3 sunken downwards is arranged between every two adjacent arc-shaped convex blocks 3a2, and the shape and the size of the tooth socket 3a3 are matched with the tooth part of the magnetic ring 1.

Based on the above embodiment, the shape of the magnetic conductive ring 1 of the magnetic conductive ring assembly includes a circular ring, a plurality of arc-shaped grooves are arranged in the circular ring, triangular teeth portions are arranged between the grooves and extend to one side perpendicular to the surface of the circular ring, the magnetic conductive ring injection lower mold cavity 3a provided by the application is attached to the top of the magnetic conductive ring injection upper mold cavity 4a of the upper mold 4 through protruding convex columns 3a1 protruding from the upper surface of the lower mold 3 when the lower mold 3 and the upper mold 4 are in a mold closing state, arc-shaped convex blocks 3a2 distributed at equal intervals and arranged on the peripheral sides of the convex columns 3a1 are used for forming arc-shaped grooves on the peripheral sides of the inner rings of the magnetic conductive ring during injection, a tooth space 3a3 recessed downwards is arranged between adjacent arc-shaped convex blocks 3a2, the shape and size of the tooth space 3a3 are matched with the magnetic conductive teeth portions of the magnetic conductive ring 1, so that injection materials can enter the teeth portions of the magnetic conductive ring 1, and the magnetic conductive ring injection lower mold cavity 3a and the magnetic conductive ring injection upper mold cavity 4a which are coaxially arranged realize the magnetic conductive ring injection upper mold cavity 1 The size of the magnetic ring 1 which can be effectively guaranteed by injection molding can be conveniently taken out by a worker when the lower die 3 and the upper die 4 are separated, so that quick blanking is realized.

Further, in order to solve the problem that the magnetic conductive ring 1, which is not completely formed after the lower mold 3 and the upper mold 4 are separated from each other, is not supported outside the circular ring portion on the lower mold 3, so that the magnetic conductive ring 1 is easily deformed during forming, as shown in fig. 5 and 15: the two sides of the magnetic ring injection lower die cavity 3a are provided with outer limit dies 6, each outer limit die 6 comprises two arc butt-joint blocks 6a with opposite openings, the inner wall size of each arc butt-joint block 6a is matched with the outer size of the magnetic ring 1, the outer wall size of each arc butt-joint block 6a is matched with the inner wall size of the magnetic ring injection upper die cavity 4a of the upper die 4, the height of each arc butt-joint block 6a is matched with the height of the convex column 3a1, each arc butt-joint block 6a is installed on each sliding block 6b, each sliding block 6b is arranged on the two sides of the magnetic ring injection lower die cavity 3a, and the outer limit dies 6 on one side of the lower die 3 are fixedly connected through the connecting blocks 6 c.

Based on the above embodiments, the magnetic ring injection lower mold cavity 3a provided by the present application solves the above problems by providing the movable outer limit molds 6 on both sides of the magnetic ring injection lower mold cavity 3a to wrap the peripheral sides of the magnetic ring injection lower mold cavity 3a so as to limit the outside of the magnetic ring 1, forming a circular ring having an inner wall size matched with the outer wall size of the magnetic ring 1 when the arc butt-joint blocks 6a of the outer limit molds 6 are butted, thereby ensuring the machining size of the magnetic ring 1, ensuring that the arc butt-joint blocks 6a of the outer limit molds 6 formed when the arc butt-joint blocks 6a are butted are matched with the size of the magnetic ring injection upper mold cavity 4a so as to ensure that the arc butt-joint blocks 6a of the outer limit molds 6 can not affect the splicing of the magnetic ring injection lower mold cavity 3a and the magnetic ring injection upper mold cavity 4a when the lower mold 3 and the upper mold 4 are closed, forming a sealed injection mold cavity, and providing the slide blocks 6b below the arc butt-joint blocks 6a, slider 6b of 3 one sides of bed dies passes through the synchronous removal of connecting block 6c fixed connection time, and when the completion back bed die 3 of moulding plastics and last mould 4 branch mould, the arc butt joint piece 6a of the spacing mould 6 in outside can carry on spacingly to the outer wall of magnetic conduction ring 1, guarantees that magnetic conduction ring 1 is complete shaping, and the arc butt joint piece 6a of both sides exposes the ring position of magnetic conduction ring 1 after the separation, makes things convenient for the staff to carry out the unloading.

Further, in order to solve the problem how to ensure that the arc-shaped butt-joint blocks 6a on the two sides are butt-jointed to form a finished circular ring in order and ensure that the central axis of the circular ring and the axis of the magnetic ring injection lower mold cavity 3a are in the same straight line, as shown in fig. 6 and 15: limiting grooves 3c are formed in two sides of a magnetic ring injection lower die cavity 3a of the lower die 3, the limiting grooves 3c are arranged on the side face perpendicular to the lower die 3 and extend towards the direction of the central axis of the magnetic ring injection lower die cavity 3a, the limiting grooves 3c are used for limiting and installing a sliding block 6b of an outer limiting die 6, and the upper surface of the sliding block 6b is flush with the upper surface of the lower die 3.

Based on the above embodiments, the limiting grooves 3c provided on the two sides of the magnetic ring injection lower cavity 3a of the lower mold 3 provided in the present application are used to limit the sliding blocks 6b inserted into the outer limiting mold 6, and the limiting grooves 3c are provided on the side surface perpendicular to the lower mold 3 and extend toward the central axis of the magnetic ring injection lower cavity 3a, so as to ensure that when the sliding blocks 6b move inside, the central axis of the arc butt-joint block 6a moves on the central plane of the magnetic ring injection lower die cavity 3a, when the slide block 6b is installed in the limit groove 3c in a limiting way, the upper surface of the slide block 6b is ensured to be flush with the upper surface of the lower die 3, so that the lower die 3 and the upper die 4 of the lower die 0 are ensured to be in a die closing state, the arc butt-joint block 6a is positioned between the magnetic ring injection lower die cavity 3a and the magnetic ring injection upper die cavity 4a and does not influence the die assembly of the lower die 3 and the upper die 4.

Further, in order to solve the problem of how to make the opposite arc-shaped butt-joint blocks 6a, as shown in fig. 15: one side of the slider 6b towards the magnetic ring injection lower die cavity 3a is provided with an adsorption magnet 6b1, and the magnet 6b1 is used for adsorbing the inner wall of the limiting groove 3 c.

Based on the above embodiment, the slider 6b provided by the application solves the above problems by arranging the adsorption magnet 6b1 at one side of the lower die cavity 3a towards the magnetic guide ring during injection molding, when the outer limit die 6 is inserted into the limit groove 3c and moves towards the lower die cavity 3a towards the magnetic guide ring during injection molding, the adsorption magnet 6b1 magnetically attracts the internal memory of the limit groove 3c made of a metal material, so that a certain pressure can be generated during butt joint of the arc butt joint blocks 6a to ensure the butt joint state of the arc butt joint blocks 6a, and the die assembly of the lower die cavity 3a for injection molding of the magnetic guide ring and the upper die cavity 4a for injection molding of the magnetic guide ring is facilitated.

Further, in order to solve the problem of how the lower mold cavity 3b and the upper mold cavity 4b form a mold cavity matching with the bush 2, as shown in fig. 5 and 6: the size of a bush injection lower die cavity 3b of the lower die 3 is matched with that of the bush 2, a plurality of fixture blocks 3b1 are arranged at the bottom of the bush injection lower die cavity 3b, and the fixture blocks 3b1 are used for forming notches of the bush 2.

Based on the above embodiment, the bushing injection molding lower die cavity 3b and the bushing injection molding upper die cavity 4b provided by the application form an inner cavity matched with the shape of the bushing 2 when the lower die 3 and the upper die 4 are closed, the bottom of the bushing injection molding lower die cavity 3b is provided with a plurality of fixture blocks 3b1, and the fixture blocks 3b1 are used for forming a notch part of the bushing 2, so that the injection molded bushing 2 is ensured to reach a machining shape conforming to the reality.

Further, in order to solve the problem how the cooling water channel 5 uniformly cools the magnetic ring injection lower mold cavity 3a, the bushing injection lower mold cavity 3b, the magnetic ring injection upper mold cavity 4a, and the bushing injection upper mold cavity 4b, as shown in fig. 7 to 10: the cooling water channel 5 comprises a first pipeline 5a and a second pipeline 5b, the first pipeline 5a horizontally penetrates through the lower die 3 and the upper die 4, the first pipeline 5a is arranged in a lower magnetic ring injection molding die cavity 3a, a lower bushing injection molding die cavity 3b, the upper magnetic ring injection molding die cavity 4a and two sides of an upper bushing injection molding die cavity 4b, the second pipeline 5b is arranged inside the lower die 3, the extending direction of the second pipeline 5b enters the lower magnetic ring injection molding die cavity 3a and the lower bushing injection molding die cavity 3b, one end of the first pipeline 5a and one end of the second pipeline 5b are connected with cooling liquid conveying equipment, and the other end of the first pipeline 5a and the other end of the second pipeline 5b are connected with cooling liquid recovery equipment.

Based on the above embodiments, the cooling water channel 5 provided in this application includes the first pipes 5a disposed in the lower mold 3 and the upper mold 4, the first pipes 5a on the lower mold 3 are respectively disposed at two sides of the lower mold cavity 3a for magnetic ring injection and the lower mold cavity 3b for bush injection in parallel, the first pipes 5a are at the same distance from the lower mold cavity 3a for magnetic ring injection and the lower mold cavity 3b for bush injection so as to ensure the consistent cooling effect, the worker can also set the first pipes 5a with certain bending according to the shapes of the lower mold cavity 3a for magnetic ring injection and the lower mold cavity 3b for bush injection to improve the cooling effect of the first pipes 5a on the peripheral sides of the lower mold cavity 3a for magnetic ring injection and the lower mold cavity 3b for bush injection, the first pipes 5a on the upper mold 4 are respectively disposed at two sides of the upper mold cavity 4a for magnetic ring injection and the upper mold cavity 4b for bush injection in parallel, the distance between the upper magnetic ring injection molding die cavity 4a and the lower magnetic ring injection molding die cavity 3a is the same as that between the lower magnetic ring injection molding die cavity 3b and the lower bushing injection molding die cavity 3b, the second pipeline 5b of the cooling water channel 5 is arranged on the lower die 3, the second pipeline 5b begins to extend from one end of the bottom of the lower die 3, the extending path of the second pipeline 5b passes through the interiors of the lower magnetic ring injection molding die cavity 3a and the lower bushing injection molding die cavity 3b, and when cooling liquid enters the second pipeline 5b, the temperatures of the interiors of the lower magnetic ring injection molding die cavity 3a and the lower bushing injection molding die cavity 3b can be reduced, so that the effect of reducing the surface temperature of an injection molding part in the inner side and the outer side and accelerating the molding is achieved.

Further, in order to solve the problem of how to ensure that the axial butt joint of the magnetic ring injection lower mold cavity 3a and the bushing injection lower mold cavity 3b when the lower mold 3 and the upper mold 4 are closed, and the axial butt joint of the magnetic ring injection upper mold cavity 4a and the bushing injection upper mold cavity 4b are stable, as shown in fig. 6 and 11: the apex angle department of lower mould 3 is provided with the guide bar 3d that extends towards the top, and the apex angle department of going up mould 4 is provided with the compound die hole 4d, and the spacing cartridge of guide bar 3d is in the compound die hole 4d, and guide bar 3d is identical with the size in compound die hole 4 d.

Based on the above-described embodiments, the present application provides the lower mold 3 and the upper mold 4 in which the above-described problems are solved by the guide bar 3d and the mold clamping hole 4d provided at the vertex angle. The upper die 4 is inserted on the guide rod 3d of the lower die 3 through the die closing hole 4d to limit the upper die 4, and the moving path of the upper die 4 is stable, so that the axial positions of the magnetic ring injection lower die cavity 3a and the magnetic ring injection upper die cavity 4a are on the same straight line when the lower die 3 and the upper die 4 are closed, and the axial positions of the bush injection lower die cavity 3b and the bush injection upper die cavity 4b are on the same straight line.

Further, in order to solve the problem of how to realize that no scratch is generated when the magnetic ring 1 and the bush 2 are demolded, as shown in fig. 11 to 14: the upper die 4 is provided with a plurality of air passages 4e, the air passages 4e vertically extend to penetrate through the upper die 4, the air passages 4e are respectively arranged in the magnetic ring injection upper die cavity 4a and the bushing injection upper die cavity 4b, and the outer ends of the air passages 4e are connected with air supply equipment.

Based on the above embodiment, the upper die 4 that this application provided has solved above-mentioned problem through air flue 4e, and air supply equipment is connected to air flue 4e, like air compressor etc. and mould 3 and upper die 4 branch mould time provides gas in moulding plastics upper die cavity 4a and bush injection upper die cavity 4b to the magnetic guide ring after the completion of moulding plastics to produce thrust to the injection molding and make things convenient for the residual position of injection molding in injection moulding runner 4c to break away from.

Further, in order to solve the problem that the injection gate 4c is small in size and makes it difficult to add the injection base, as shown in fig. 14: the upper end of the injection gate 4c of the upper mold 4 is provided with a tapered mouth 4c1, and the tapered mouth 4c1 is formed with a channel that gradually narrows from top to bottom on the injection gate 4 c.

Based on above-mentioned embodiment, the sprue 4c that moulds plastics that this application provided has solved above-mentioned problem through set up the taper mouth 4c1 that from top to bottom narrows gradually at sprue 4c top of moulding plastics, base material conveying equipment that moulds plastics can add the base material of moulding plastics that melts in the taper mouth 4c1, the base material of moulding plastics flows gradually in sprue 4c of moulding plastics and gets into the die cavity 4a and the bush mould plastics and go up the die cavity 4b on the magnetic ring is moulded plastics, thereby it is littleer to have realized the size of sprue 4c of moulding plastics, it is littleer to remain the position on magnetic ring 1 and bush 2 surface down, convenient subsequent processing that refines.

The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides an injection mold of magnetic conduction ring subassembly, its characterized in that, the magnetic conduction ring subassembly is formed by two magnetic conduction rings (1) and a bush (2) combination, injection mold includes lower mould (3) and upper mould (4), is provided with two magnetic conduction ring injection moulding lower die cavities (3a) and a bush injection moulding lower die cavity (3b) on lower mould (3), and magnetic conduction ring injection moulding lower die cavity (3a) and bush injection moulding lower die cavity (3b) parallel arrangement, and the below of upper mould (4) is provided with the magnetic conduction ring injection moulding upper die cavity (4a) that corresponds with magnetic conduction ring injection moulding lower die cavity (3a) and bush injection moulding upper die cavity (4b) that corresponds with bush injection moulding lower die cavity (3b), and the central axis of magnetic conduction ring injection moulding lower die cavity (3a) and the central axis of magnetic conduction ring injection moulding upper die cavity (4a) are in the same straight line, and the central axis of bush injection moulding lower die cavity (3b) are in the same straight line On line, mould cavity (4a) and bush are moulded plastics and are gone up and set up respectively on mould cavity (4b) by vertical runner (4c) of moulding plastics that upwards link up upper die (4) on the magnetic ring of upper die (4), and runner (4c) of moulding plastics are used for connecting the base material conveying equipment of moulding plastics, be provided with on lower mould (3) and upper die (4) and be used for magnetic ring (1) and bush (2) rapid cooling fashioned cooling water course (5).

2. The injection mold of a magnetic conduction ring assembly according to claim 1, characterized in that the magnetic conduction ring injection lower mold cavity (3a) of the lower mold (3) comprises a convex column (3a1) protruding from the upper surface of the lower mold (3), the size of the magnetic conduction ring injection lower mold cavity (3a) is matched with the size of the inner wall of the magnetic conduction ring (1), the height of the convex column (3a1) is the same as the height of the magnetic conduction ring injection upper mold cavity (4a) of the upper mold (4), the inner wall of the magnetic conduction ring injection upper mold cavity (4a) is larger than the size of the outer ring of the magnetic conduction ring (1), a plurality of arc-shaped convex blocks (3a2) are arranged around the periphery of the convex column (3a1) at equal intervals, the size of the arc-shaped convex blocks (3a2) corresponds to the inner opening of the magnetic conduction ring (1), a tooth socket (3a3) which is recessed downwards is arranged between the adjacent arc-shaped convex blocks (3a2), and the shape and the size of the tooth socket (3a3) is matched with the tooth part of the magnetic conduction ring (1).

3. The injection mold of a magnetic conduction ring assembly according to claim 1, characterized in that outer limit molds (6) are arranged on two sides of the lower magnetic conduction ring injection molding cavity (3a), each outer limit mold (6) comprises two arc butt-joint blocks (6a) with opposite openings, the inner wall size of each arc butt-joint block (6a) is matched with the outer size of a magnetic conduction ring (1), the outer wall size of each arc butt-joint block (6a) is matched with the inner wall size of the upper magnetic conduction ring injection molding cavity (4a) of the upper mold (4), the height of each arc butt-joint block (6a) is matched with the height of the corresponding convex column (3a1), each arc butt-joint block (6a) is installed on each sliding block (6b), each sliding block (6b) is arranged on two sides of the lower magnetic conduction ring injection molding cavity (3a) relatively, and the outer limit molds (6) on one side of the lower mold (3) are fixedly connected through each connecting block (6 c).

4. An injection mold for a magnetic ring assembly according to claim 3, wherein the two sides of the magnetic ring injection lower mold cavity (3a) of the lower mold (3) are provided with limiting grooves (3c), the limiting grooves (3c) are arranged on the side surfaces perpendicular to the lower mold (3) and extend towards the central axis of the magnetic ring injection lower mold cavity (3a), the limiting grooves (3c) are used for limiting and installing the sliding blocks (6b) of the outer limiting mold (6), and the upper surfaces of the sliding blocks (6b) are flush with the upper surface of the lower mold (3).

5. An injection mold for a magnetic ring assembly according to claim 4, wherein the side of the slider (6b) facing the magnetic ring injection lower mold cavity (3a) is provided with a suction magnet (6b1), and the suction magnet (6b1) is used for sucking the inner wall of the limiting groove (3 c).

6. The injection mold of a magnetic conduction ring assembly according to claim 1, wherein the size of the bushing injection lower mold cavity (3b) of the lower mold (3) is matched with the size of the bushing (2), a plurality of clamping blocks (3b1) are arranged at the bottom of the bushing injection lower mold cavity (3b), and the clamping blocks (3b1) are used for forming notches of the bushing (2).

7. An injection mold of a magnetic conductive ring assembly according to claim 1, wherein the cooling water channel (5) comprises a first pipe (5a) and a second pipe (5b), the first pipe (5a) horizontally penetrates the lower mold (3) and the upper mold (4), the first pipe (5a) is disposed in the magnetic conductive ring injection lower mold cavity (3a) and the bushing injection lower mold cavity (3b), the two sides of the upper die cavity (4a) for magnetic ring injection molding and the upper die cavity (4b) for bush injection molding are arranged, the second pipeline (5b) is arranged inside the lower die (3), the extending direction of the second pipeline (5b) enters the inner parts of the lower die cavity (3a) for magnetic ring injection molding and the lower die cavity (3b) for bush injection molding, the first pipeline (5a) and one end of the second pipeline (5b) are connected with cooling liquid conveying equipment, and the first pipeline (5a) and the other end of the second pipeline (5b) are connected with cooling liquid recovery equipment.

8. The injection mold of a magnetic conduction ring assembly according to claim 1, wherein a guide rod (3d) extending upwards is arranged at the top corner of the lower mold (3), a mold closing hole (4d) is arranged at the top corner of the upper mold (4), the guide rod (3d) is inserted into the mold closing hole (4d) in a limiting manner, and the guide rod (3d) is matched with the mold closing hole (4d) in size.

9. The injection mold of a magnetic conduction ring assembly according to claim 1, characterized in that the upper mold (4) is provided with a plurality of air passages (4e), the air passages (4e) vertically extend through the upper mold (4), the air passages (4e) are respectively arranged in the magnetic conduction ring injection upper mold cavity (4a) and the bushing injection upper mold cavity (4b), and the outer ends of the air passages (4e) are connected with an air supply device.

10. An injection mold of a magnetic conduction ring assembly according to claim 1, characterized in that the upper end of the injection gate (4c) of the upper mold (4) is provided with a tapered opening (4c1), and the tapered opening (4c1) forms a channel which gradually narrows from top to bottom on the injection gate (4 c).