阅读说明：本技术 磁转子注塑模具、磁转子注塑工艺和磁转子 (Magnetic rotor injection mold, magnetic rotor injection molding process and magnetic rotor ) 是由 黎鸿斌 刘文成 于 2021-08-13 设计创作，主要内容包括：本发明公开一种磁转子注塑模具、磁转子注塑工艺和磁转子,其中,磁转子注塑模具包括由不带磁材料制成的后模仁组件和前模仁组件,以及进浇流道,后模仁组件包括后模仁本体和后模镶件,后模仁本体开设有多个安装定位孔；后模镶件有多个且一一对应设于安装定位孔,后模镶件设有产品定位腔；前模仁组件用于闭合或者打开后模仁组件,前模仁组件闭合后模仁组件时,前模仁组件与转子外壳的上端面接触,且前模仁组件与磁铁之间形成注塑腔以用于形成表面包胶封口；进浇流道设于前模仁组件,进浇流道的进料端连接料筒,进浇流道的出料端在前模仁组件闭合后模仁组件时与注塑腔连通。本发明技术方案旨在提供一种用于注塑更强磁力磁转子的磁转子注塑模具。(The invention discloses a magnetic rotor injection mold, a magnetic rotor injection process and a magnetic rotor, wherein the magnetic rotor injection mold comprises a rear mold core assembly and a front mold core assembly which are made of non-magnetic materials, and a pouring runner, the rear mold core assembly comprises a rear mold core body and a rear mold insert, and the rear mold core body is provided with a plurality of mounting positioning holes; the rear mold insert is provided with a plurality of product positioning cavities; the front mold core assembly is used for closing or opening the rear mold core assembly, when the front mold core assembly closes the rear mold core assembly, the front mold core assembly is contacted with the upper end face of the rotor shell, and an injection molding cavity is formed between the front mold core assembly and the magnet and is used for forming a surface encapsulation seal; the feeding runner is arranged on the front die core assembly, the feeding end of the feeding runner is connected with the charging barrel, and the discharging end of the feeding runner is communicated with the injection molding cavity when the front die core assembly closes the rear die core assembly. The technical scheme of the invention aims to provide a magnetic rotor injection mold for injecting a stronger magnetic rotor.)

1. A magnetic rotor injection mold for surface encapsulation sealing of a rotor case mounted with a magnet, the magnetic rotor injection mold comprising:

a rear mold core assembly made of non-magnetic material, the rear mold core assembly comprising:

the rear mold core body is provided with a plurality of mounting positioning holes; and

the rear mold insert is used for placing a rotor shell provided with a magnet, the rear mold insert is provided with a plurality of installation positioning holes which are arranged in a one-to-one correspondence manner, and the rear mold insert is provided with a product positioning cavity;

the front die core assembly is made of non-magnetic materials and used for closing or opening the rear die core assembly, when the front die core assembly closes the rear die core assembly, the front die core assembly is in contact with the upper end face of the rotor shell, and an injection molding cavity is formed between the front die core assembly and the magnet and used for forming surface encapsulation sealing; and

and the feeding runner is arranged on the front die core assembly, the feeding end of the feeding runner is connected with the charging barrel, and the discharging end of the feeding runner is communicated with the injection molding cavity when the front die core assembly closes the rear die core assembly.

2. The magnetic rotor injection mold of claim 1, wherein the front core assembly comprises:

a front mold core body;

the front mold insert is provided with a plurality of front mold core bodies, the front mold insert corresponds to the rear mold core assembly in position, and when the front mold core assembly closes the rear mold core assembly, the front mold insert is contacted with the upper end surface of the rotor shell; and

the front die insert is arranged on one side, facing the rear die core assembly, of the front die insert.

3. The magnetic rotor injection mold of claim 2, wherein the front mold core body and the rear mold core body are made of aluminum alloy, and the rear mold insert, the front mold insert and the front mold insert are made of beryllium copper.

4. The magnetic rotor injection mold according to claim 1, wherein a first sliding groove is formed in one side of the rear mold core body facing the front mold core assembly, four first sliding grooves extend from different directions to the mounting positioning holes, a second sliding groove corresponding to the first sliding groove is formed in the rear mold core insert, the second sliding groove extends to the product positioning cavity, the first sliding groove and the second sliding groove are communicated to form a sliding groove, the rear mold core assembly further comprises a sliding block, the sliding block is made of beryllium copper, the sliding block is provided with a plurality of sliding grooves and corresponds to the sliding grooves one by one, a return spring is arranged between the sliding block and the rear mold core insert, and the sliding block is in sliding fit with the sliding grooves to limit the rotor housing.

5. The magnetic rotor injection mold according to claim 4, wherein four of the installation positioning holes are formed, the installation positioning holes are symmetrically arranged in a left-right manner with two single sides, a slope guide groove is further formed between adjacent installation positioning holes, two sides of the slope guide groove are respectively communicated with the first sliding groove, a shovel base is arranged on one side of the front mold core assembly facing the rear mold core body, the shape of the shovel base corresponds to the shape of the groove of the slope guide groove, and when the front mold core assembly closes the rear mold core assembly, the shovel base extends into the slope guide groove to push the sliding blocks on two sides.

6. The injection mold for magnetic rotors according to claim 4, wherein the slide block has a first position-limiting portion and a second position-limiting portion parallel to each other, a position-limiting groove is formed between the first position-limiting portion and the second position-limiting portion, and the back mold core assembly further comprises a position-limiting member disposed between the position-limiting grooves and the back mold core body.

7. The injection mold for a magnetic rotor of any one of claims 1 to 6, further comprising a thimble slidably disposed in the rear core assembly and extending into the product positioning cavity.

8. The injection mold for magnetic rotors according to any one of claims 1 to 6, further comprising a first cooling water set and a second cooling water set, wherein the first cooling water set is disposed on the rear core assembly, and the second cooling water set is disposed on the front core assembly.

9. An injection molding process for a magnetic rotor for producing the magnetic rotor, the injection molding process for the magnetic rotor comprising the steps of:

s1, injection molding the rotor shell;

s2, assembling magnets, namely installing four magnets in a rotor shell, wherein the magnets are connected with the rotor shell in a clamping mode, the magnets are two north-pole magnets and two south-pole magnets, and homopolar magnets are oppositely arranged;

s3, preparing a mold, namely, adopting the magnetic rotor injection mold according to any one of claims 1 to 8, calculating an injection molding cycle according to the injection molding amount per second set by an injection molding machine and the total required material amount, and drying injection molding material particles in advance, wherein the mold is kept warm;

s4, placing the rotor shell with the magnet in the product positioning cavity;

s5, heating the die and the charging barrel to ensure that the temperature meets the injection molding requirement;

s6, die assembly and injection molding are carried out, molten plastic is sprayed out from a nozzle of the charging barrel and enters an injection molding cavity along a pouring runner, and the surface of the rotor shell, which is provided with the magnet, is encapsulated and sealed;

and S7, opening the die to take the part after the die is cooled.

10. A magnetic rotor for a milk frother, characterized in that it is injection moulded on the basis of a magnetic rotor injection mould according to any of claims 1 to 8.

Technical Field

The invention relates to the technical field of magnetic rotor injection molding, in particular to a magnetic rotor injection mold, a magnetic rotor injection molding process and a magnetic rotor.

Background

The milk foam machine is a kitchen article for making milk foam, and the milk foam machine includes five golden cups and drive base, and the inside detachably of cup of five golden cups is equipped with the magnetic rotor that is used for making milk foam, is equipped with driving motor in the drive base and connects another rotor that has magnet, and when placing five golden cups on the drive base, rotor and magnetic rotor magnetism are connected, and driving motor drive rotor rotates for the magnetic rotor synchronous rotation in the five golden cups.

However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:

the magnetic rotor in five golden cups at present only contains two magnet, and magnetic force is relatively weak, leads to the frothing effect of suckleing unsatisfactory, if increase the quantity of magnet, then can produce the problem that adsorbs each other or repel and magnet can be adsorbed on the mould between the magnet at the in-process of moulding plastics, can not have comparatively perfect solution in the trade at present, even can produce in small batches, the product defective rate is also on the high side, inefficiency, the quality of the product of moulding plastics is also unstable.

Disclosure of Invention

The invention mainly aims to provide a magnetic rotor injection mold, and aims to provide a magnetic rotor injection mold for injecting a stronger magnetic rotor.

In order to achieve the above object, the present invention provides a magnetic rotor injection mold for encapsulating a rotor case having a magnet on a surface thereof, the magnetic rotor injection mold comprising:

a rear mold core assembly made of non-magnetic material, the rear mold core assembly comprising:

the rear mold core body is provided with a plurality of mounting positioning holes; and

the rear mold insert is used for placing a rotor shell provided with a magnet, the rear mold insert is provided with a plurality of installation positioning holes which are arranged in a one-to-one correspondence manner, and the rear mold insert is provided with a product positioning cavity;

the front die core assembly is made of non-magnetic materials and used for closing or opening the rear die core assembly, when the front die core assembly closes the rear die core assembly, the front die core assembly is in contact with the upper end face of the rotor shell, and an injection molding cavity is formed between the front die core assembly and the magnet and used for forming surface encapsulation sealing; and

and the feeding runner is arranged on the front die core assembly, the feeding end of the feeding runner is connected with the charging barrel, and the discharging end of the feeding runner is communicated with the injection molding cavity when the front die core assembly closes the rear die core assembly.

In one embodiment, the front core assembly comprises:

a front mold core body;

the front mold insert is provided with a plurality of front mold core bodies, the front mold insert corresponds to the rear mold core assembly in position, and when the front mold core assembly closes the rear mold core assembly, the front mold insert is contacted with the upper end surface of the rotor shell; and

the front die insert is arranged on one side, facing the rear die core assembly, of the front die insert.

In an embodiment, the front mold core body and the rear mold core body are made of aluminum alloy, and the rear mold insert, the front mold insert and the front mold insert are made of beryllium copper.

In an embodiment, a first sliding groove is formed in one side, facing the front mold core assembly, of the rear mold core body, four first sliding grooves extend from the non-direction to the installation positioning holes, a second sliding groove corresponding to the first sliding groove is formed in the rear mold core insert, the second sliding groove extends to the product positioning cavity, the first sliding groove is communicated with the second sliding groove to form a sliding groove, the rear mold core assembly further comprises a sliding block, the sliding block is made of beryllium copper, the sliding block is provided with a plurality of sliding grooves in one-to-one correspondence, a return spring is arranged between the sliding block and the rear mold core insert, and the sliding block is in sliding fit with the sliding grooves to limit the rotor shell.

In an embodiment, four of the installation positioning holes are formed, the installation positioning holes are symmetrically arranged in a left-right manner in a single-side two manner, a slope guide groove is further formed between every two adjacent installation positioning holes, two sides of the slope guide groove are respectively communicated with the first sliding groove, a shovel base is arranged on one side, facing the rear die core body, of the front die core assembly, the shape of the shovel base corresponds to the shape of the groove of the slope guide groove, and when the front die core assembly closes the rear die core assembly, the shovel base extends into the slope guide groove to push the sliding blocks on two sides.

In an embodiment, the slide block is provided with a first limiting portion and a second limiting portion which are parallel to each other, a limiting groove is formed between the first limiting portion and the second limiting portion, the rear mold core assembly further includes a limiting member, and the limiting member is disposed on the rear mold core body and located between the limiting grooves.

In an embodiment, the magnetic rotor injection mold further includes a thimble slidably disposed in the rear mold core assembly and extending into the product positioning cavity.

In an embodiment, the magnetic rotor injection mold further includes a first cooling water set and a second cooling water set, the first cooling water set is disposed on the rear mold core assembly, and the second cooling water set is disposed on the front mold core assembly.

The invention also provides a magnetic rotor injection molding process for producing the magnetic rotor, which comprises the following steps:

s1, injection molding the rotor shell;

s2, assembling magnets, namely installing four magnets in a rotor shell, wherein the magnets are connected with the rotor shell in a clamping mode, the magnets are two north-pole magnets and two south-pole magnets, and homopolar magnets are oppositely arranged;

s3, preparing a mold, namely calculating an injection molding cycle by adopting the magnetic rotor injection mold according to the injection molding amount per second set by an injection molding machine and the total required material amount, drying injection molding material particles in advance, and keeping the temperature of the mold;

s4, placing the rotor shell with the magnet in the product positioning cavity;

s5, heating the die and the charging barrel to ensure that the temperature meets the injection molding requirement;

s6, die assembly and injection molding are carried out, molten plastic is sprayed out from a nozzle of the charging barrel and enters an injection molding cavity along a pouring runner, and the surface of the rotor shell, which is provided with the magnet, is encapsulated and sealed;

and S7, opening the die to take the part after the die is cooled.

The invention further provides a magnetic rotor for the milk foam machine, and the magnetic rotor is formed by injection molding based on the magnetic rotor injection mold.

The technical scheme of the invention comprises a rear mould core component and a front mould core component which are made of non-magnetic materials, and a pouring channel for conveying molten plastics, wherein the rear mould core component comprises a rear mould core body and a rear mould insert, the rear mould core body is provided with a plurality of mounting positioning holes, the rear mould insert is used for placing a rotor shell provided with magnets, the rear mould insert is provided with a plurality of mounting positioning holes in one-to-one correspondence, the rear mould insert is provided with a product positioning cavity, the front mould core component is used for closing or opening the rear mould core component, when the front mould core component closes the rear mould core component, the front mould core component is contacted with the upper end surface of the rotor shell, an injection molding cavity is formed between the front mould core component and the magnets for forming surface encapsulation sealing, the pouring channel is arranged on the front mould core component, the feeding end of the pouring channel is connected with a charging barrel, and the discharging end of the pouring channel is communicated with the injection molding cavity when the front mould core component closes the rear mould core component, through adopting new mould structure and adopting the technical means of not taking back mould benevolence subassembly and front mould benevolence subassembly that magnetic material made, so, effectively solved among the prior art because the magnetic force of magnet effect leads to moulding plastics and has the technical problem of more defects, and then realized producing stronger magnetic force, satisfied higher requirement and have the technological effect of stability quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a magnetic rotor injection mold according to the present invention;

FIG. 2 is a schematic view of a disassembled structure of an embodiment of the magnetic rotor injection mold of the present invention;

FIG. 3 is a schematic view of the structure of a rotor housing with magnets installed according to the present invention;

FIG. 4 is a schematic structural view of the rear core assembly of the present invention;

FIG. 5 is a schematic top view of the rear core assembly of the present invention;

FIG. 6 is a schematic structural view of the rear core body of the present invention;

FIG. 7 is a schematic view of the slider of the present invention;

FIG. 8 is a schematic view of a front core assembly according to the present invention;

the reference numbers illustrate:

a magnetic rotor injection mold 100; a rear core assembly 10; a rear mold core body 11; mounting positioning holes 111; a first sliding groove 112; a slope guide groove 113; a rear mold insert 12; a product positioning cavity 121; a second slide groove 122; a slider 13; a first stopper 131; a second stopper 132; a return spring 133; a stopper 14; a first cooling water group 15; a front core assembly 20; a front core body 21; a front mold insert 22; a front mold insert pin 23; a shovel base 24; a second cooling water group 25; a pouring runner 30; and a thimble 40.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a magnetic rotor injection mold 100, which is used for encapsulating and sealing the surface of a rotor shell provided with a magnet, wherein the rotor shell provided with the magnet is shown in figure 3.

Magnetic rotor divides two stages to mould plastics, be stage one and stage two respectively, stage one is rotor case's moulding plastics, magnetic rotor's structure is as shown in the figure, connecting portion and installation department including being connected, the installation department is the cross, the middle part of installation department is equipped with a square installation step, the mounting hole that extends to connecting portion is seted up to the installation step, be four installation slot that are linked together along the outside of installation step, installation slot is used for installing magnet, installation slot's inner wall all is equipped with the joint groove, magnet is installed in installation slot department, and realize the joint through the joint groove and connect, guarantee product transport or the in-process of moulding plastics, magnet does not take place the pine and takes off, after the magnet installation, there is the certain distance upper surface of magnet and rotor case's top terminal surface, this distance is used for forming surface rubber coating and seals. And the second stage is injection molding of the surface encapsulated seal, which is realized by the magnetic rotor injection mold 100 provided by the invention.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

In an embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 4 and fig. 5, the magnetic rotor injection mold 100 includes a rear mold core assembly 10, a front mold core assembly 20 and a pouring runner 30, wherein the rear mold core assembly 10 is made of non-magnetic material, the rear mold core assembly 10 includes a rear mold core body 11 and a rear mold insert 12, and the rear mold core body 11 is provided with a plurality of installation positioning holes 111; the rear mold insert 12 is used for placing a rotor shell provided with a magnet, the rear mold insert 12 is provided with a plurality of mounting positioning holes 111 which are arranged in a one-to-one correspondence manner, and the rear mold insert 12 is provided with a product positioning cavity 121; the front die core component 20 is made of non-magnetic materials, the front die core component 20 is used for closing or opening the rear die core component 10, when the front die core component 20 closes the rear die core component 10, the front die core component 20 is contacted with the upper end surface of the rotor shell, and an injection molding cavity is formed between the front die core component 20 and the magnet to form surface encapsulation sealing; the pouring runner 30 is arranged on the front die core assembly 20, the feeding end of the pouring runner 30 is connected with the charging barrel, and the discharging end of the pouring runner 30 is communicated with the injection molding cavity when the front die core assembly 20 closes the rear die core assembly 10.

It can be understood that the injection molding cavity is formed when the rear mold core assembly 10 and the front mold core assembly 20 are covered, in order to avoid that the magnet installed on the rotor housing is adsorbed by the mold, the rear mold core assembly 10 and the front mold core assembly 20 are both made of non-magnetic materials, and it is ensured that the placed magnet cannot cause injection molding failure due to the problems of magnetic attraction and repulsion. The rear mold core assembly 10 comprises a plurality of rear mold inserts 12, the front mold core assembly 20 comprises a plurality of front mold inserts 22, the rear mold inserts 12 correspond to the front mold inserts 22 one by one, a plurality of injection molding cavities are formed by arranging a plurality of groups of inserts, so that a plurality of products can be completed by one-time injection molding, the production efficiency is improved, the pouring flow channel 30 comprises a main flow channel and branch flow channels which are communicated, a charging barrel is connected to one end of the main flow channel, and the branch flow channels communicated with the main flow channel correspond to different injection molding cavities respectively. The rotor shell provided with the four magnets is placed in the product positioning cavity 121, the front die core assembly 20 is close to the rear die core assembly 10 for die assembly, molten plastic is sprayed out from a nozzle of the charging barrel and enters the injection molding cavity along the pouring runner 30, and the surface of the rotor shell provided with the magnets is encapsulated and sealed.

The technical scheme of the invention comprises a rear mould core component 10 and a front mould core component 20 which are made of non-magnetic materials, and a pouring channel 30 for conveying molten plastics, wherein the rear mould core component 10 comprises a rear mould core body 11 and a rear mould insert 12, the rear mould core body 11 is provided with a plurality of mounting positioning holes 111, the rear mould insert 12 is used for placing a rotor shell provided with magnets, the rear mould insert 12 is provided with a plurality of corresponding mounting positioning holes 111, the rear mould insert 12 is provided with a product positioning cavity 121, the front mould core component 20 is used for closing or opening the rear mould core component 10, when the front mould core component 20 closes the rear mould core component 10, the front mould core component 20 is contacted with the upper end surface of the rotor shell, an injection molding cavity is formed between the front mould core component 20 and the magnets for forming surface encapsulation sealing, the pouring channel 30 is arranged on the front mould core component 20, the feeding end of the pouring channel 30 is connected with a charging barrel, and the discharging end of the pouring channel 30 is communicated with the injection molding cavity when the front mould core component 20 closes the rear mould core component 10, through adopting new mould structure and adopting the technical means of not taking back mould benevolence subassembly 10 and front mould benevolence subassembly 20 that magnetic material made, so, effectively solved among the prior art because the magnetic force of magnet effect leads to moulding plastics and has the technical problem of more defect, and then realized producing stronger magnetic force, satisfied higher requirement and have the technological effect of stability quality.

In an embodiment of the present invention, as shown in fig. 2 and 8, the front core assembly 20 includes a front core body 21, a plurality of front mold inserts 22 and front mold insert pins 23, wherein the front mold inserts 22 are disposed on the front core body 21, the front mold inserts 22 correspond to the rear mold inserts 12, and when the front core assembly 20 closes the rear core assembly 10, the front mold inserts 22 contact with the upper end surface of the rotor housing; a front mold insert 23 is provided on the side of the front mold insert 22 facing the rear mold core assembly 10. The position of the front mold insert pin 23 corresponds to the position of the rotor housing mounting hole, and when the mold is closed, the front mold insert pin 23 extends into the mounting hole to play a role in positioning and further limiting.

In the embodiment of the present invention, the front mold core body 21 and the rear mold core body 11 are made of aluminum alloy, and the rear mold insert 12, the front mold insert 22, and the front mold insert 23 are made of beryllium copper. The aluminum alloy and the beryllium copper are both non-magnetic materials, and cannot influence the magnet in the injection molding process.

In an embodiment of the present invention, as shown in fig. 4, 5, and 6, a first sliding groove 112 is disposed on one side of the rear mold core body 11 facing the front mold core assembly 20, four first sliding grooves 112 extend from different directions to the mounting positioning hole 111, the rear mold insert 12 is disposed with a second sliding groove 122 corresponding to the first sliding groove 112, the second sliding groove 122 extends to the product positioning cavity 121, the first sliding groove 112 and the second sliding groove 122 are communicated to form a sliding groove, the rear mold core assembly 10 further includes a slider 13, the slider 13 is made of beryllium copper, the slider 13 is disposed with a plurality of sliders and corresponds to the sliding grooves one by one, a return spring 133 is disposed between the slider 13 and the rear mold insert 12, and the slider 13 is in sliding fit with the sliding groove to limit the rotor housing.

It can understand, the installation department of rotor housing is the cross, the direction of seting up of sliding tray is four directions all around, and slider 13 carries out sliding fit along the sliding tray that corresponds, place the rotor housing that will be equipped with magnet behind product location chamber 121, the four sides of installation department and sliding part butt and with the outside promotion of sliding part, reset spring 133 is in by the tensile state this moment, slider 13 is followed four directions all around and is carried out the centre gripping to rotor housing under the effect of spring force, make rotor housing can be spacing in product location chamber 121.

In an embodiment of the present invention, as shown in fig. 4, 5, and 6, four installation positioning holes 111 are formed, and are symmetrically arranged in a left-right manner by using two single sides, a slope guide groove 113 is further disposed between adjacent installation positioning holes 111, two sides of the slope guide groove 113 are respectively communicated with the first sliding groove 112, a scoop base 24 is disposed on one side of the front core assembly 20 facing the rear core body 11, the scoop base 24 has a shape corresponding to a groove shape of the slope guide groove 113, and when the front core assembly 20 closes the rear core assembly 10, the scoop base 24 extends into the slope guide groove 113 to push the sliders 13 on two sides. The material of scoop base 24 is also made of a non-magnetic material. Through setting up shovel base 24 for slider 13 is spacing between shovel base 24 and rotor case, can not take place to slide at the in-process of moulding plastics, has further improved spacing effect.

In an embodiment of the present invention, as shown in fig. 7, the sliding block 13 is provided with a first limiting portion 131 and a second limiting portion 132 that are parallel to each other, a limiting groove is formed between the first limiting portion 131 and the second limiting portion 132, the rear mold core assembly 10 further includes a limiting member 14, and the limiting member 14 is disposed on the rear mold core body 11 and located between the limiting grooves. Through setting up the sliding range of spacing groove in order to inject slider 13, can guarantee that slider 13 does not take place the pine and take off, improves structural stability.

In an embodiment of the present invention, as shown in fig. 1 and 2, the magnetic rotor injection mold 100 further includes an ejector pin 40, and the ejector pin 40 is slidably disposed on the rear core assembly 10 and extends into the product positioning cavity 121. The ejector pin 40 is used for pushing the magnetic rotor out of the product positioning cavity 121 by sliding the ejector pin 40 upwards after injection molding is finished, so that material taking is facilitated.

In an embodiment of the present invention, as shown in fig. 1 and 2, the rotor injection mold 100 further includes a first cooling water set 15 and a second cooling water set 25, the first cooling water set 15 is disposed on the rear mold core assembly 10, and the second cooling water set 25 is disposed on the front mold core assembly 20. The first cooling water group 15 and the second cooling water group 25 are used for cooling to ensure the normal operation of the magnetic rotor injection mold 100.

The invention also provides a magnetic rotor injection molding process for producing the magnetic rotor, which comprises the following steps:

s1, injection molding the rotor shell;

s2, assembling magnets, namely installing four magnets in a rotor shell, wherein the magnets are connected with the rotor shell in a clamping mode, the magnets are two north-pole magnets and two south-pole magnets, and homopolar magnets are oppositely arranged;

s3, preparing a mold, namely calculating an injection molding cycle by adopting the magnetic rotor injection mold 100 according to the injection molding amount per second set by an injection molding machine and the total required material amount, drying injection molding material particles in advance, and keeping the temperature of the mold;

s4, placing the rotor shell with the magnet in the product positioning cavity 121;

s5, heating the die and the charging barrel to ensure that the temperature meets the injection molding requirement;

s6, die assembly and injection molding are carried out, molten plastic is sprayed out from a nozzle of the charging barrel and enters an injection molding cavity along the pouring runner 30, and the surface of the rotor shell, which is provided with the magnet, is encapsulated and sealed;

and S7, opening the die to take the part after the die is cooled.

In the step S1, the mold for injection molding of the rotor is another set of independent mold, and when the mold is opened, an installation slot for placing the magnet is reserved, and a tolerance range is set according to the size of the magnet, so as to ensure that the magnet with magnetism is tightly fitted when installed in the installation slot, and the magnet cannot be attracted or repelled by the magnet due to the looseness of the magnet, so that the magnet is separated from the installation slot. Through the mounting means of tight fit, thereby also can guarantee that magnet can bear the strong pressure of penetrating the gluey during the second time of moulding plastics and avoid magnet to produce the aversion.

In S3, the temperature of the drying treatment is 85 ℃ and the drying time is 3 hours.

In S5, the mold was heated to 50 ℃ and the barrel was heated to 260 ℃.

The invention also provides a magnetic rotor for the milk foam machine, wherein the magnetic rotor is formed by injection molding based on the magnetic rotor injection mold 100. The magnetic rotor formed by injection molding through the magnetic rotor injection mold 100 has the characteristics of stronger magnetism and higher quality. Can meet the requirements of the milk foam machine.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.