Plastic package forming equipment and plastic package process for integrally-formed plastic package part of motor

Abstract

The invention discloses plastic package forming equipment and a plastic package process for an integrally-formed plastic package part of a motor, and relates to the field of motor processing. According to the scheme, in the injection molding process, secondary heating and shunting are carried out on flow-state plastic pressurized by an injection molding machine, a vacuum environment is formed in a second seat body, and the flowability of the liquid-state plastic is guaranteed and improved. Along with the increase of the filling degree of the injection molding bin, the slide column is heated to enable the airtight piston to provide secondary pressure for the flow-state plastic at the end through the material pushing plate, after the injection molding machine stops injection molding, pressure compensation is conducted through the heating hysteresis of the slide column, and after injection molding is completed, a heat exchange medium is introduced for rapid cooling molding. The problem that part of traditional products are prone to incomplete plastic packaging is solved, the pressure is gradually increased through heating hysteresis of the slide column to guarantee full filling of plastic, and the probability of plastic packaging defects is reduced; and meanwhile, the problem that the motor part stays in a static mold after mold opening is solved, smooth demolding is achieved, automatic mechanical arm material taking is facilitated, and the automatic deployment process is promoted.

Description

Technical Field

[0001] The present invention relates to the field of motor processing, and particularly to a plastic sealing forming device and a plastic sealing process for integrally formed plastic sealed components of a motor. Background Art

[0002] Under the unique advantages of current plastic sealed motors, such as stability and low noise, various plastic sealed motors have gradually begun to be popularized and used. Currently, there is a plastic sealed motor integrally connected to a gearbox. A key component of this plastic seal is an integrally plastic sealed and formed component, which is formed by plastic sealing three motor components, namely a stator, a gearbox seat, and a motor body, into one. During the production process, the motor components need to be pre-positioned and placed in a mold. Since there are more injection gaps for the three components compared to a single component, it is extremely vulnerable to changes in temperature and pressure parameters, resulting in incomplete plastic sealing.

[0003] Currently, the commonly used method is to preheat the motor components and the mold, which can reduce the unstable filling situation to a certain extent. The core of the problem is that the temperature of the flowing plastic decreases as it enters the injection chamber, resulting in poor fluidity. At the same time, during the plastic sealing process of current motor components, a large area of them is plastic sealed in the injection chamber. After the moving mold and the stationary mold are separated during the mold opening process, the motor components are retained in the stationary mold, with less exposed area, making it inconvenient to take out, and unable to be quickly cooled, resulting in a higher temperature when personnel take the material. At the same time, this situation is also not conducive to the fixed trajectory material taking of an automated robotic arm, posing challenges to automated deployment. Summary of the Invention

[0004] The purpose of the present invention is to propose a plastic sealing forming device and a plastic sealing process for integrally formed plastic sealed components of a motor to solve the problems that the flowing plastic is extremely vulnerable to temperature and pressure changes and is incompletely filled during the plastic sealing process of current motor components, and the plastic sealed motor components cannot be stably taken out during discharging.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A plastic sealing forming device for integrally formed plastic sealed components of a motor includes a stationary mold assembly for plastic sealing motor components, a moving mold assembly movable on one side thereof, and a hydraulic rod for driving the moving mold assembly. The moving mold assembly includes a moving mold base and a moving mold core fixed thereon. The moving mold core includes a core base and two compensation components arranged therein. The moving mold core includes a first seat body and a lifter pillar integrally formed thereon. The compensation component includes an airtight piston sliding in the lifter pillar, a push plate, and an airtight slide rod fixed on one side of the airtight piston, and a distance sensor is arranged at one end of the airtight slide rod. The stationary mold assembly includes a stationary mold base and a stationary mold core fixed thereon. The stationary mold core includes a second seat body and two interfaces arranged at the bottom of the second seat body. A plurality of injection chambers are arranged on one side of the second seat body.

[0006] As a further description of the above technical solution: The moving mold assembly further includes two auxiliary sliding columns symmetrically fixed on one side of the moving mold base. The surfaces of the two auxiliary sliding columns are jointly penetrated and slid by a pressure seat, and two compression springs are jointly arranged on the opposite surfaces of the pressure seat and the moving mold base. The compression springs slide on the surfaces of the auxiliary sliding columns, and a main sliding column for guiding the sliding of the moving mold base is penetrated and slid on the surface of the moving mold base.

[0007] As a further description of the above technical solution: One end of the hydraulic rod is penetrated and fixed with a left side seat. The left side seat is located at the same axial position as the moving mold assembly and the static mold assembly. The auxiliary sliding column is penetrated and slid on the left side seat. One end of the main sliding column is fixed on the surface of the left side seat, and the telescopic end of the hydraulic rod is fixedly connected to one side of the pressure seat.

[0008] As a further description of the above technical solution: The static mold assembly further includes a right side seat fixed on one side of the static mold base. A diverter communicated with the injection molding machine is penetrated and fixed on the right side seat, and the diverter is penetrated and arranged in the inner wall of the static mold base and communicated with a plurality of injection chambers of the static mold core.

[0009] As a further description of the above technical solution: The static mold core further includes a plurality of ear grooves opened on one side of the second seat body, and the ear grooves are communicated with the corresponding injection chambers.

[0010] As a further description of the above technical solution: The mold core base further includes a box seat groove opened on one side of the first seat body for positioning the motor component, and a plurality of flow equalizing platforms opened at the end of the slide block column. A plurality of guide grooves are opened on the arc-shaped side wall of the slide block column.

[0011] As a further description of the above technical solution: The compensation assembly further includes a cover fixed on one side of the first seat body. The distance sensor is penetrated and fixed on one side of the cover, and one end of the airtight sliding rod slides in the cover after penetrating and sliding through the first seat body.

[0012] As a further description of the above technical solution: The motor component slides into the injection chamber after being positioned by the cooperation of the slide block column and the box seat groove, and the first seat body and the second seat body are in a lapped state.

[0013] As a further description of the above technical solution: The plastic sealing process for the motor integrated molding plastic sealing component includes the following steps: S1. Feeding and positioning of the motor component: The cleaned motor component is sleeved on the surface of the slide block column, and is pressed into it after being fitted based on the shape of the box seat groove; S2. Switching to the heat preservation mode during the mold closing process, controlling the hydraulic rod to push the pressure seat and the moving mold base until the moving mold core is attached to the static mold core, and at the same time, evacuating the inside of the second seat body to a vacuum state through two interfaces; S3. During the split injection molding process, continuous heating is carried out. Start the injection molding machine to pressurize and inject the fluid plastic into the splitter. While the splitter is continuously heated, it splits the fluid plastic into multiple injection molding chambers. S4. During the injection molding process, secondary pressurization is carried out. The pressurized fluid plastic gradually fills the gaps under the heat preservation environment of the injection molding chamber, and makes the ejector pins heat up, causing the internal heat medium to expand. The sealing piston drives the pushing plate to apply secondary pressure to the fluid plastic. S5. Continuously keep the mold closed and cool down. Open the closed interface and introduce the heat exchange medium, and keep the heat exchange medium cooling the inside of the second body during continuous replacement. S6. Plastic encapsulation molding and discharging. After the fluid plastic cools, it wraps the surface of the motor component. At the same time, the temperature of the ejector pins decreases, resulting in the displacement of the airtight piston. A negative pressure is formed between it and the plastic encapsulated component, and the plastic encapsulated motor component is pulled out of the injection molding chamber by the negative pressure during the opening process of the moving mold assembly.

[0014] As a further description of the above technical solution: After the injection molding in step S3 starts, the displacement of the airtight sliding rod is monitored by a distance sensor, and the temperature change in the injection molding chamber is understood through the displacement. And the temperature change includes temperature estimation, heating and cooling rates, and the flow rate of the heat exchange medium is controlled according to the cooling rate.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: When this solution is used, the fluid plastic pressurized by the injection molding machine is secondarily heated and split to ensure its fluidity. And by creating a vacuum environment inside the second body, the fluidity of the liquid plastic during the injection molding process is improved. During the split injection molding process, as the filling degree in the injection molding chamber gradually increases, the ejector pins heat up, causing volume changes in the internal heat medium, and the airtight piston provides a secondary pressure to the fluid plastic filled at the end of the ejector pin through the pushing plate. After the injection molding machine stops injection molding, due to the hysteresis of the ejector pins heating up, pressure compensation that gradually increases starts until the displacement sensor detects no displacement, then the internal pressure cannot continue to increase, and the vacuum state of the second body can be released, and the heat exchange medium is introduced to achieve rapid cooling and molding. This method realizes technical breakthroughs and optimizations in many aspects. On the one hand, it effectively solves the problem of incomplete plastic encapsulation caused by changes in temperature and pressure parameters. By secondarily heating and splitting the fluid plastic pressurized by the injection molding machine, and creating a vacuum environment inside the second body, the fluidity of the liquid plastic is greatly ensured and improved. The airtight piston provides secondary pressure to the fluid plastic filled at the end of the ejector pin through the pushing plate, and uses the hysteresis of the ejector pins heating up for pressure compensation after the injection molding machine stops injection molding, so that the plastic can fill into each injection gap more fully, reducing the probability of plastic encapsulation defects caused by insufficient fluidity.

[0016] On the other hand, the problem that the motor components remain in the stationary mold after mold opening is solved. As the heat exchange medium is introduced into the second seat body, its heat is quickly dissipated. After the motor components are plastic-sealed inside, they are cooled and formed. The temperature of the lifter pins decreases, causing the airtight piston to reset. During the reset process, a negative pressure suction force is formed on the sprue of the injection molding, enabling the plastic-sealed motor components to be separated from the injection molding chamber as the moving mold assembly moves under the combined action of this suction force and the support of the lifter pins in the mold opening state, achieving smooth demolding during mold opening and avoiding the situation of remaining in the injection molding chamber. The plastic-sealed motor components exposed to the air after mold opening can reduce the temperature during personnel material taking, and the stable demolding process also facilitates the automated robotic arm to perform material taking operations along a fixed trajectory, strongly promoting the process of automated deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective schematic view of the present invention; Figure 2 is an exploded schematic view of the present invention; Figure 3 is a perspective sectional schematic view of the present invention; Figure 4 is a perspective schematic view of the present invention in an unclosed mold state; Figure 5 is a sectional schematic view of the moving mold core of the present invention in three dimensions; Figure 6 is a perspective schematic view of the stationary mold core of the present invention; Figure 7 is a sectional schematic view of the moving mold core and the stationary mold core of the present invention in a closed mold state for the motor components; Figure 8 is another sectional state schematic view of the moving mold core and the stationary mold core of the present invention in a closed mold state for the motor components; Figure 9 is an exploded schematic view of a partial section of the moving mold core, the stationary mold core and the motor components of the present invention.

[0018] LEGEND DESCRIPTION: 10. Moving mold assembly; 11. Moving mold core; 111. Mold core seat; 011. First seat body; 012. Lifter pin; 013. Flow equalizing table; 014. Guide groove; 015. Box seat groove; 112. Compensation assembly; 021. Airtight slide bar; 022. Airtight piston; 023. Pusher plate; 024. Enclosure; 025. Distance sensor; 12. Moving mold base; 13. Pressure seat; 14. Auxiliary slide column; 15. Compression spring; 16. Main slide column; 20. Stationary mold assembly; 21. Stationary mold base; 22. Stationary mold core; 221. Second seat body; 222. Injection molding chamber; 223. Interface; 224. Ear groove; 23. Right side seat; 24. Divider; 30, left side seat; 40, hydraulic rod; 50, motor component. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0020] As Figure 1 - Figure 9 shown, the present invention provides a plastic sealing and forming device for an integrally formed plastic sealing component of a motor, including a static mold component 20 for plastic sealing the motor component 50 and a moving mold component 10 movable on one side thereof, and a hydraulic rod 40 for driving the moving mold component 10. The moving mold component 10 includes a moving mold base 12 and a moving mold core 11 fixed thereon. The moving mold core 11 includes a mold core base 111 and two compensation components 112 arranged therein. The moving mold core 11 includes a first seat body 011 and a lifter post 012 integrally formed thereon. The compensation component 112 includes an airtight piston 022 sliding in the lifter post 012, a push plate 023, and an airtight slide rod 021 fixed on one side of the airtight piston 022, and a distance sensor 025 is provided at one end of the airtight slide rod 021; The static mold component 20 includes a static mold base 21 and a static mold core 22 fixed thereon. The static mold core 22 includes a second seat body 221 and two interfaces 223 provided at the bottom of the second seat body 221. A plurality of injection molding chambers 222 are provided on one side of the second seat body 221.

[0021] By providing the interface 223, the interface 223 can be connected to a cooling system including a vacuum pump. The inside of the second seat body 221 is in a cavity shape, and air can be extracted for heat preservation or a heat exchange medium can be introduced for rapid cooling control, and the cooling rate can be adjusted by controlling the flow rate of the heat exchange medium during the cooling process.

[0022] Specifically, as Figure 2 shown: The moving mold component 10 further includes two auxiliary slide columns 14 symmetrically fixed on one side of the moving mold base 12. A pressure seat 13 is slidably penetrated through the surfaces of the two auxiliary slide columns 14, and two compression springs 15 are provided on the opposite surfaces of the pressure seat 13 and the moving mold base 12. The compression springs 15 slide on the surfaces of the auxiliary slide columns 14, and a main slide column 16 for guiding the sliding of the moving mold base 12 is slidably penetrated through the surface of the moving mold base 12.

[0023] By setting the pressure seat 13, which applies pressure to the moving die base 12 through the compression spring 15, when the hydraulic rod 40 squeezes the pressure seat 13, the compression spring 15 deforms, and at the same time, the moving die base 12 drives the moving die insert 11 to fit with the stationary die insert 22, providing a mold closing pressure.

[0024] The main sliding column 16 can slide on the moving die base 12 when the moving die base 12 moves, achieving a stable sliding effect.

[0025] Specifically, as Figure 1 and Figure 3 shown: One end of the hydraulic rod 40 is fixedly penetrated with a left side seat 30. The left side seat 30 is located at the same axial position as the moving die assembly 10 and the stationary die assembly 20. The auxiliary sliding column 14 penetrates and slides on the left side seat 30. One end of the main sliding column 16 is fixed on the surface of the left side seat 30. The telescopic end of the hydraulic rod 40 is fixedly connected to one side of the pressure seat 13.

[0026] By setting the auxiliary sliding column 14, which is fixed on the moving die base 12, when the moving die base 12 moves, it drives the auxiliary sliding column 14 to slide on the left side seat 30, forming a support structure capable of relative displacement sliding, improving the stability of the movement of the moving die base 12.

[0027] Specifically, as Figure 3 shown: The stationary die assembly 20 further includes a right side seat 23 fixed on one side of the stationary die base 21. A diverter 24 communicating with the injection molding machine is fixedly penetrated on the right side seat 23. The diverter 24 is penetrated and arranged to communicate with a plurality of injection chambers 222 on the inner wall of the stationary die base 21 and the stationary die insert 22.

[0028] By setting the right side seat 23, both it and the left side seat 30 are in a fixed state and do not move. Combining with the main sliding column 16 fixed on their opposite surfaces, a stable frame support structure is formed. The diverter 24 set on it has a plurality of pipes for shunting during the injection molding process inside, and electric heating wires capable of precisely regulating the temperature are coiled on the surface of the pipes, which can maintain the temperature during the shunting process. Combining with the temperature sensor set inside, it can play a role in maintaining the fluidity of the plastic.

[0029] Specifically, as Figure 6 shown: The stationary die insert 22 further includes a plurality of ear grooves 224 opened on one side of the second seat body 221. The ear grooves 224 communicate with the corresponding injection chambers 222.

[0030] By setting the ear grooves 224, which are opened on the stationary die insert 22 and communicate with the injection chambers 222. During the injection molding process, the flowing plastic is shunted from the injection chambers 222 into the ear grooves 224, and after cooling, mounting ears are formed on the outside of its plastic package.

[0031] Specifically, as Figure 5As shown: The mold core base 111 further includes a box seat groove 015 opened on one side of the first base body 011 for positioning the motor component 50, and a plurality of flow equalizing platforms 013 opened at the end of the slider post 012. A plurality of guide grooves 014 are opened on the arc-shaped side wall of the slider post 012. Specifically, as Figure 8 and Figure 9 shown: After the motor component 50 is positioned by the cooperation of the slider post 012 and the box seat groove 015, it slides into the injection molding chamber 222, and the first base body 011 and the second base body 221 are in an overlapping state.

[0032] By providing the box seat groove 015, it can cooperate with the complete fitting of the motor component 50, can play the role of positioning the motor component 50, and can keep the part located in the box seat groove 015 from being plastic sealed. By the first base body 011 and the second base body 221 being in an overlapping state, it can maintain the clamping pressure and can discharge air through the gap during the injection molding process.

[0033] By providing the flow equalizing platforms 013, which are located at the end of the slider post 012 and contact the inside of the injection molding chamber 222 during mold clamping, keep the flow evenly distributed during the injection molding process, and form multiple break points after the sheet-shaped material head is demolded, which can facilitate the separation operation of the material head; By adopting the guide grooves 014, which are opened on the surface of the slider post 012, the plastic fills into them during the plastic sealing process and forms a plurality of strip-shaped protrusions on the inner wall of the motor component 50, thereby forming the heat dissipation air flow guide grooves 014 on the inner wall.

[0034] Specifically, as Figure 7 shown: The compensation component 112 further includes a cover 024 fixed on one side of the first base body 011. The distance sensor 025 is fixedly penetrated on one side of the cover 024. One end of the airtight slide rod 021 slides in the cover 024 after penetrating and sliding through the first base body 011.

[0035] By providing the wind cover, the wind cover can form a relatively closed space on one side of the first base body 011, can avoid interference during the detection process of the distance sensor 025, ensure the accuracy of the detection process. At the same time, the airtight slide rod 021 can penetrate and slide on the first base body 011, and its sealed sliding state satisfies its sliding while keeping the inside of the slider post 012 sealed.

[0036] The plastic sealing process for the motor integrated molding plastic sealing component includes the following steps: S1. Loading and positioning of the motor component 50. The cleaned motor component 50 is sleeved on the surface of the slider post 012, and the motor component 50 is pressed into it after being fitted based on the shape of the box seat groove 015; S2. During the mold closing process, switch to the heat preservation mode, control the hydraulic rod 40 to push the pressure seat 13 and the moving mold base 12 until the moving mold core 11 fits with the stationary mold core 22. At the same time, evacuate the inside of the second seat body 221 to a vacuum state through two interfaces 223; S3. During the split injection molding process, continue heating. Start the injection molding machine to pressurize and inject the fluid plastic into the diverter 24. While the diverter 24 is continuously heated, it diverts the fluid plastic into multiple injection chambers 222; S4. During the injection molding process, apply secondary pressure. The pressurized fluid plastic gradually fills the gaps in the heat preservation environment of the injection chamber 222, and makes the lifter pin 012 heat up, causing the heat medium inside it to expand. The sealing piston drives the pusher plate 023 to apply secondary pressure to the fluid plastic; S5. Keep the mold closed and cool down. Open the closed interface 223 and introduce the heat exchange medium, and keep the heat exchange medium cooling the inside of the second seat body 221 during continuous replacement; S6. Plastic encapsulation molding and discharging. After the fluid plastic cools, it coats the surface of the motor component 50. At the same time, the temperature of the lifter pin 012 decreases, causing the airtight piston 022 to displace, forming a negative pressure between it and the plastic encapsulated component. During the mold opening process of the moving mold assembly 10, the plastic encapsulated motor component 50 is pulled out of the injection chamber 222 by the negative pressure.

[0037] Specifically, as shown in Figure *, after the injection molding in step S3 starts, monitor the displacement of the airtight slide rod 021 through the distance sensor 025, and understand the temperature change in the injection chamber 222 through the displacement. The temperature change includes temperature estimation, heating and cooling rates, and control the flow rate of the heat exchange medium according to the cooling rate.

[0038] When this solution is in use, after placing the cleaned motor component 50 on the lifter pin 012 and positioning it through the box seat groove 015, the hydraulic rod 40 can be driven. The hydraulic rod 40 moves by pushing the pressure seat 13. When the pressure seat 13 moves, it pushes the moving mold base 12 through the compression spring 15. When the moving mold base 12 moves, it slides on the surface of the main slide post 16. At the same time, the moving mold base 12 drives two auxiliary slide posts 14 to slide on the left side seat 30 to maintain a stable mold closing displacement until the moving mold core 11 is carried to fit with the stationary mold core 22. In this state, the motor component 50 enters the stationary mold core 22. At the same time, the flow equalizing table 013 at the end of the lifter pin 012 contacts the inner wall of the injection chamber 222 and is evenly distributed around the feed port; After the moving mold core 11 and the stationary mold core 22 are clamped, the hydraulic rod 40 maintains the clamping pressure and stands by. Then, by starting the vacuum pump, the vacuum pump is connected to one of the interfaces 223 at the bottom of the second seat body 221, and the other interface 223 is connected to a valve with on-off control. By closing the valve, the vacuum pump extracts the heat transfer medium in the second seat body 221, creating a relative vacuum state inside. Under normal use, the vacuum pressure is maintained between -0.08 MPa and -0.095 MPa, which can better meet the balance between heat preservation and energy consumption. This vacuum degree can effectively reduce the interference of gas on heat transfer, enabling the fluid plastic to maintain good fluidity during the injection molding process, reducing the plastic sealing problems caused by rapid temperature drop. On the other hand, compared with a higher vacuum degree, such a pressure setting requires a smaller power of the vacuum pump and lower energy consumption, reducing production costs while ensuring the production effect; After being in the heat preservation state, the injection molding machine injects fluid plastic into the diverter 24. The diverter 24 evenly distributes and heats it to keep its temperature from dropping until it is injected into the injection cavity 222. When the fluid plastic enters the injection cavity 222, it first fills the reserved space at the end of the lifter pin 012. After being filled, it is evenly distributed and flows out under the action of the uniform flow table 013 around it (when demolding, the plastic between the uniform flow tables 013 can be disconnected, and there is only a circular flat-shaped material head in the middle of the lifter pin 012). The plastic between the uniform flow tables 013 is evenly dispersed in the injection cavity 222 of the second seat body 221 and enters the guide groove 014 under pressure, forming several strip-shaped plastic protrusions in contact with the motor component 50 and the lifter pin 012, and the gap between the plastic protrusions is the air flow channel during the subsequent operation of the motor; After the fluid plastic is evenly distributed, the temperature is usually between 150°C and 320°C, specifically depending on different plastic types. The temperature in the injection cavity 222 rises. The metal heat conduction of the lifter pin 012 has a certain lag. The injection molding process takes a few seconds. After the injection molding is completed, the injection molding machine stops pressurizing. The lifter pin 012 is fully heated inside, causing the heat transfer medium inside to expand. During the displacement of the airtight piston 022, through the push plate 023, the liquid plastic stored at the end of the lifter pin 012 is pressurized, so that the liquid plastic still has sufficient fluidity under the relative heat preservation state. During the process of gradually expanding due to heat, the pressure is gradually increased on it, so that after the first feeding and pressurization, continuous and gradually increasing secondary pressurization is carried out until the displacement sensor detects that the airtight slide rod 021 has no displacement, and then the rapid shaping step can be entered; By opening the valve corresponding to the interface 223, the vacuum pump is started, and a heat exchange medium such as gas or water body is introduced into the second body 221 (if water is introduced, a water-gas separation tank is installed at the air inlet of the vacuum pump). After the vacuum insulation state is released, the heat is quickly carried away, keeping the surface of the motor component 50 quickly encapsulated. After the temperature drops, the temperature of the lifter post 012 at its core position also drops accordingly, until the airtight piston 022 drives the pusher plate 023 to reset. At this time, the sealing slide rod resets and moves. After the distance sensor 025 detects that the displacement distance of the sealing slide rod reaches the set value, the cooling is completed and the mold is opened; During the process of the pusher plate 023 resetting with the airtight piston 022, the sprue at the end of the lifter post 012 fits tightly with it and is adsorbed under the negative pressure force. In this state, the sprue part gradually receives a negative pressure during the cooling process, causing it to undergo a small deformation while remaining attached to the end of the sprue. Then, the hydraulic rod 40 drives the moving mold assembly 10 to reset, and the moving mold insert 11 is separated from the stationary mold insert 22. At this time, the encapsulated motor component 50 is removed from the injection mold cavity 222 along with the first body 011.

[0039] This method combines the primary pressurization of the injection molding machine with the injection molding. Under its thermal action and combined with the hysteresis of heat conduction of the lifter post 012, a secondary pressurization cooperation after injection molding is formed. After the primary heating of the injection molding machine, the diverter 24 performs secondary heating to ensure the fluidity and uniformity of the uniform diversion state. And when demolding, based on the negative pressure effect, the motor component 50 is kept moving with the moving mold insert 11 to demold. Combining the insulation mode and the rapid cooling cooperation, the overall encapsulation process has high efficiency, the mold opening and closing time is effectively shortened, the yield rate of the product is guaranteed, the encapsulation quality is reliable, the discharging is more stable, and it is convenient to carry out the automated layout.

[0040] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. The plastic encapsulation forming equipment for the integrally formed plastic encapsulated component of the motor, comprising a static mold assembly (20) for plastic encapsulating the motor component (50) and a moving mold assembly (10) movable on one side thereof, and a hydraulic rod (40) for driving the moving mold assembly (10), characterized in that: The moving die assembly (10) includes a moving die base (12) and a moving die core (11) fixed thereon. The moving die core (11) includes a die core base (111) and two compensation components (112) arranged therein. The moving die core (11) includes a first body (011) and a lifter post (012) integrally formed thereon. The compensation component (112) includes an airtight piston (022) and a push plate (023) sliding in the lifter post (012), and an airtight slide rod (021) fixed to one side of the airtight piston (022), and a distance sensor (025) is arranged at one end of the airtight slide rod (021); The static die assembly (20) includes a static die base (21) and a static die core (22) fixed thereon. The static die core (22) includes a second body (221) and two interfaces (223) arranged at the bottom of the second body (221). A plurality of injection chambers (222) are arranged on one side of the second body (221).

2. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 1, characterized in that, The moving die assembly (10) further includes two auxiliary slide columns (14) symmetrically fixed on one side of the moving die base (12). A pressure seat (13) is slidably penetrated through the surfaces of the two auxiliary slide columns (14). Two compression springs (15) are arranged on the opposite surfaces of the pressure seat (13) and the moving die base (12). The compression springs (15) slide on the surfaces of the auxiliary slide columns (14). A main slide column (16) for guiding the sliding thereof is slidably penetrated through the surface of the moving die base (12).

3. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 2, wherein, One end of the hydraulic rod (40) is fixed with a left side seat (30). The left side seat (30) is located at the same axial position as the moving die assembly (10) and the static die assembly (20). The auxiliary slide column (14) slides on the left side seat (30). One end of the main slide column (16) is fixed on the surface of the left side seat (30). The telescopic end of the hydraulic rod (40) is fixedly connected to one side of the pressure seat (13).

4. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 3, characterized in that, The static die assembly (20) further includes a right side seat (23) fixed on one side of the static die base (21). A diverter (24) communicated with an injection molding machine is fixedly penetrated through the right side seat (23). The diverter (24) is penetrated through the inner wall of the static die base (21) and communicated with a plurality of injection chambers (222) of the static die core (22).

5. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 1, wherein The static die core (22) further includes a plurality of ear grooves (224) opened on one side of the second body (221). The ear grooves (224) are communicated with the corresponding injection chambers (222).

6. The plastic encapsulation molding equipment for the integrally molded plastic encapsulated component of the motor, characterized in that, The die core base (111) further includes a box seat groove (015) opened on one side of the first body (011) for positioning a motor component (50), and a plurality of flow equalizing platforms (013) opened at the end of the lifter post (012). A plurality of guide grooves (014) are opened on the arc-shaped side wall of the lifter post (012).

7. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 6, wherein, The compensation component (112) further includes a cover (024) fixed on one side of the first body (011). The distance sensor (025) is fixedly penetrated through one side of the cover (024). One end of the airtight slide rod (021) slides in the cover (024) after penetrating through the first body (011).

8. The plastic encapsulation forming device for the integrally formed plastic encapsulated component of the motor according to claim 1, characterized in that, The motor component (50) is located within the injection molding chamber (222), and the first base body (011) and the second base body (221) are in an overlapping state.

9. A plastic encapsulation process for an integrally formed plastic encapsulated component of an electric motor, using the plastic encapsulation forming equipment for an integrally formed plastic encapsulated component of an electric motor as claimed in claim 7, characterized in that, The method includes the following steps: S1. Loading and positioning the motor component (50). The cleaned motor component (50) is sleeved on the surface of the slider post (012), and is press-fitted into the box seat groove (015) based on its shape. S2. During the mold clamping process, switch to the heat preservation mode. Control the hydraulic rod (40) to push the pressure seat (13) and the moving mold base (12) until the moving mold core (11) is in contact with the stationary mold core (22). At the same time, evacuate the inside of the second base body (221) to a vacuum state through two interfaces (223). S3. During the split injection molding process, continuously heat. Start the injection molding machine to pressurize and inject the fluid plastic into the splitter (24). While the splitter (24) is continuously heated, it splits the fluid plastic into multiple injection molding chambers (222). S4. Apply secondary pressure during the injection molding process. The pressurized fluid plastic gradually fills the voids in the heat preservation environment of the injection molding chamber (222), and heats the slider post (012). The heat medium inside the slider post (012) expands, and the sealing piston drives the push plate (023) to apply secondary pressure to the fluid plastic. S5. Continuously maintain the mold clamping state and cool down. Open the closed interface (223) and introduce the heat exchange medium. Keep the heat exchange medium cooling the inside of the second base body (221) during continuous replacement. S6. Plastic encapsulation molding and discharging. After the fluid plastic cools, it coats the surface of the motor component (50). At the same time, the temperature of the slider post (012) decreases, causing the displacement of the airtight piston (022), forming a negative pressure between it and the plastic encapsulated component. During the mold opening process of the moving mold assembly (10), the plastic encapsulated motor component (50) is pulled out of the injection molding chamber (222) by the negative pressure.

10. The plastic encapsulation process for the integrally formed plastic encapsulated component of an electric motor according to claim 9, characterized in that, After the injection molding in step S3 starts, monitor the displacement of the airtight slide rod (021) through the distance sensor (025), understand the temperature change inside the injection molding chamber (222) through the displacement, and control the flow rate of the heat exchange medium according to the cooling rate.

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