Motor shell injection molding device

Abstract

The utility model provides a motor shell injection molding device, which is characterized in that a base is fixed on a counterweight table through foundation bolts, an injection molding cylinder consistent with the length direction of the base is fixed on the upper surface of the base, a blanking seat is further fixed on the upper surface of the counterweight table at the end part of the base, and a sliding rail mechanism is arranged on the upper surface of the blanking seat. A mold mechanism matched with the injection molding cylinder is connected to the sliding rail mechanism in a sliding manner; during use, when demoulding is started after a round of injection molding is finished, the air inflation mechanism and the heating ring in the heat preservation head can be started, heat preservation can be carried out on plastic to be cooled at the end of the injection molding barrel at the moment, the plastic close to the end opening is prevented from being solidified, and therefore it is guaranteed that the flowing state of plastic media is kept consistent during next injection molding; and the internal property of the motor shell is stabilized.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an injection molding device for a motor housing. Background Art

[0002] As the main power equipment, the motor is usually used to drive pumps, fans, compressors and other transmission machinery. The motor housing is an important safety device used to protect the internal components of the motor. Its function is to prevent the motor from causing sparks or excessive temperature rise, which may lead to explosion hazards. In the process of producing the motor housing, an injection molding device is required to perform injection molding on the motor housing. The plastic is heated by the injection molding device, and the molten plastic is filled into the mold, so that the explosion-proof motor housing can be processed and formed.

[0003] After searching, it is found that in the prior art, when performing motor housing injection molding, the outer wall of the motor housing often needs to be provided with ribs for reinforcement, which leads to a slow injection speed, and then the molten plastic fills the mold. However, the slow injection time easily causes the plastic near the injection port to cool down faster, and then causes uneven flow rate. Therefore, we propose a new injection molding device suitable for motor housing injection molding to solve this defect. Utility Model Content

[0004] In view of this, the embodiments of the present utility model hope to provide a motor housing injection molding device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the utility model is implemented as follows: it includes a base fixed on the counterweight platform by anchor bolts, an injection molding cylinder consistent with the length direction of the base is fixed on the upper surface of the base, a material discharge seat is fixed on the upper surface of the counterweight platform at the end of the base, a slide rail mechanism is provided on the upper surface of the material discharge seat, and a mold mechanism adapted to the injection molding cylinder is slidably connected to the slide rail mechanism; the injection molding cylinder is in the shape of a syringe as a whole, and a heat preservation head is sleeved and fixed on the circumferential outer wall of the injection molding cylinder near the injection port, and the heat preservation head is in the shape of a conical cylinder as a whole, A heating ring with an annular structure is fixed inside the insulation head, an air inlet pipe is inserted into the circumferential outer wall of the insulation head near the top, and an air outlet is opened at the end of the circumferential outer wall of the insulation head away from the air inlet pipe; a push screw is rotatably connected inside the injection molding cylinder, and a feed port is opened at the end of the outer wall of the injection molding cylinder away from the insulation head, a vertical raw material barrel is inserted at the top of the feed port, and an inflation mechanism is arranged on the outer wall of the injection molding cylinder between the air inlet pipe and the feed port, the inflation mechanism includes an air pressure barrel fixed on the outer wall of the injection molding cylinder, and an air supply pipe is arranged between the outlet end of the air pressure barrel and the air inlet pipe.

[0006] In some embodiments, the raw material barrel is funnel-shaped as a whole, and a swing spring is fixed to the outer wall of the narrow neck of the raw material barrel, and a knocking block is fixed to the end of the swing spring away from the raw material barrel, and the inflation mechanism also includes a motor frame fixed to the side of the injection molding cylinder, and a driving motor is fixed to the top of the motor frame, and a wheel is fixed to the top of the output shaft of the driving motor, and a protruding toggle block is fixed to the circumferential outer wall of the wheel, and when the toggle block rotates to the knocking block, the knocking block will be briefly pushed downward.

[0007] In some embodiments, the inflation mechanism also includes a piston disk slidably connected to the air pressure barrel, and a connecting rod is hinged on the side of the piston disk away from the bottom of the barrel, and the end of the connecting rod close to the wheel disc is connected to the surface of the wheel disc; an annular groove is opened on the circumferential outer wall of the piston disk, and a one-way sealing ring is sleeved in the annular groove.

[0008] In some embodiments, the mold mechanism includes two parallel and vertical mold frames, and a mutually interlocking mold is fixed between the two mold frames, and a plurality of mutually parallel ejector rods are slidably connected inside the mold, and the same ejector disk is fixed to the end of the ejector rod away from the insulation head, a return spring is fixed between the ejector disk and the mold, and a permanent magnet is embedded in the middle of the ejector disk, a hydraulic ejector rod is fixed to the end of the mold frame away from the injection cylinder, and a notch is opened at the end of the hydraulic ejector rod extension rod, and an electromagnet is fixed in the notch.

[0009] In some embodiments, the slide rail mechanism includes two demoulding slide rails that are parallel to each other and open upward and fixed on the upper surface of the unloading seat, and a boss slider is fixed at one end of the two demoulding slide rails close to the mold frame, and the top of the boss slider is fixed on the mold frame.

[0010] In some embodiments, two parallel buffer springs are fixed to one side of the boss slider away from the mold, and the same contact piece is fixed to the ends of the two buffer springs, and a contact head matching the contact piece is fixed to the upper surface of the demolding slide rail on that side.

[0011] In some embodiments, a sealed bearing is embedded in the middle of the end of the injection molding cylinder away from the insulation head, and the shaft of the advancement screw passes through the sealed bearing and is fixed with a driven gear, a servo motor is fixed to the lower surface of the base, and a driving gear meshing with the driven gear is fixed to the top of the output shaft of the servo motor; the diameter of the driving gear is smaller than that of the driven gear.

[0012] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0013] 1. A motor housing injection molding device, through the air pipe and the air pressure barrel, can be used. When a round of injection molding is completed and demoulding begins, the inflation mechanism and the heating ring in the insulation head can be started. At this time, the plastic that is about to cool at the end of the injection molding cylinder can be insulated to avoid solidification of the plastic near the port, thereby ensuring that the flow state of the plastic medium remains consistent during the next injection molding, thereby stabilizing the internal properties of the motor housing.

[0014] 2. A motor housing injection molding device, which is equipped with a knocking block and a wheel with a toggle block. When the toggle block continues to rotate with the wheel, it will be disengaged. At this time, it can immediately swing in the opposite direction under the action of a swing spring, thereby knocking on the raw material barrel, so that the particles blocked in the narrow neck of the raw material barrel can be cleared outside the barrel, ensuring smooth feeding.

[0015] 3. A motor housing injection molding device, which has two contact pieces connected in series in the circuit of the electromagnet. When the main body is demoulded to a certain position, the contact piece will simultaneously stick to the two contact heads, and then connect the circuit. At this time, the circuit can be triggered to energize the electromagnet, and then start to drive the ejector rod to start.

[0016] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0020] Figure 3 It is a schematic diagram of a half-section three-dimensional structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the utility model after demoulding;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the thermal insulation head of the utility model.

[0023] Reference numerals:

[0024] 1. Base; 2. Servo motor; 3. Driven gear; 4. Injection cylinder; 401, feed port; 5. Raw material barrel; 6. Wheel; 7. Air pressure barrel; 8. Air pipe; 9. Insulation head; 91, air outlet; 10. Mold frame; 11. Mold; 12. Hydraulic ejector; 13. Demolding slide rail; 14. Unloading seat; 15. Driving motor; 16. Boss slider; 17. Contact piece; 18. Contact head; 19. Reset spring; 20. Swing spring; 21. Ejector plate; 22. Heating ring; 23. Push screw; 24. Ejector rod. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] In this embodiment, Figure 1-5 As shown, a motor housing injection molding device comprises a base 1 fixed on a counterweight platform by anchor bolts, an injection molding cylinder 4 which is consistent with the length direction of the base 1 is fixed on the upper surface of the base 1, a material discharge seat 14 is also fixed on the upper surface of the counterweight platform at the end of the base 1, a slide rail mechanism is provided on the upper surface of the material discharge seat 14, and a mold mechanism which is compatible with the injection molding cylinder 4 is slidably connected to the slide rail mechanism; the injection molding cylinder 4 is a syringe-shaped structure as a whole, and a heat preservation head 9 is sleeved and fixed on the circumferential outer wall of the injection molding cylinder 4 near the injection port, the heat preservation head 9 is a conical cylinder structure as a whole, and a heating ring 22 of an annular structure is fixed inside the heat preservation head 9, an air inlet pipe is inserted near the top of the circumferential outer wall of the heat preservation head 9, and an air outlet hole 91 is opened on the circumferential outer wall of the heat preservation head 9 away from the air inlet pipe; the internal rotation connection of the injection molding cylinder 4 There is a pushing screw 23, and a feed port 401 is formed at one end of the outer wall of the injection molding cylinder 4 away from the insulation head 9, a vertical raw material barrel 5 is inserted at the top of the feed port 401, and an inflation mechanism is arranged on the outer wall of the injection molding cylinder 4 between the air inlet pipe and the feed port 401, the inflation mechanism comprises an air pressure barrel 7 fixed on the outer wall of the injection molding cylinder 4, an air supply pipe 8 is arranged between the air outlet end of the air pressure barrel 7 and the air inlet pipe; through the arranged air supply pipe 8 and air pressure barrel 7, when in use, when demolding starts after a round of injection molding is completed, the inflation mechanism and the heating ring 22 in the insulation head 9 can be started, at this time, the plastic that is about to cool at the end of the injection molding cylinder 4 can be insulated to avoid solidification of the plastic near the port, thereby ensuring that the flow state of the plastic medium remains consistent during the next injection molding, and then stabilizing the internal properties of the motor housing.

[0028] In this embodiment, the raw material barrel 5 is funnel-shaped as a whole, and a swing spring 20 is fixed to the outer wall of the thin neck of the raw material barrel 5, and a knocking block is fixed to the end of the swing spring 20 away from the raw material barrel 5, and the inflation mechanism also includes a motor frame fixed to the side of the injection cylinder 4, and a driving motor 15 is fixed to the top of the motor frame, and a wheel 6 is fixed to the top of the output shaft of the driving motor 15, and a protruding toggle block is fixed to the circumferential outer wall of the wheel 6. When the toggle block rotates to the knocking block, the knocking block will be briefly pushed downward, and when the toggle block continues to rotate with the wheel 6, it will be out of the obstruction. At this time, it can immediately swing in the opposite direction under the action of the swing spring 20, and then form a knock on the raw material barrel 5, so that the particles blocked in the thin neck of the raw material barrel 5 can be cleared outside the barrel, ensuring smooth feeding.

[0029] In this embodiment, the inflation mechanism also includes a piston disk slidably connected to the air pressure barrel 7, and a connecting rod is hinged on the side of the piston disk away from the bottom of the barrel, and the end of the connecting rod close to the wheel disc 6 is connected to the surface of the wheel disc 6; an annular groove is opened on the circumferential outer wall of the piston disk, and a one-way sealing ring is sleeved in the annular groove. The gas passing through the sealing ring can only be infused from the outside into the interior of the air pressure barrel 7, and then enters the interior of the insulation head 9 through the extrusion of the piston disk.

[0030] In this embodiment, the mold mechanism includes two parallel and vertical mold frames 10, and a mold 11 that interlocks with each other is fixed between the two mold frames 10, and a plurality of parallel ejector rods 24 are slidably connected inside the mold 11, and the same ejector disk 21 is fixed at the end of the ejector rod 24 away from the insulation head 9, a return spring 19 is fixed between the ejector disk 21 and the mold 11, and a permanent magnet is embedded in the middle of the ejector disk 21, and a hydraulic ejector rod 12 is fixed at the end of the mold frame 10 away from the injection cylinder 4, and a notch is opened at the end of the extension rod of the hydraulic ejector rod 12, and an electromagnet is fixed in the notch; when the electromagnet is energized, the end close to the permanent magnet generates a magnetic force consistent with the magnetic pole of the permanent magnet, thereby pushing the ejector disk 21 and the ejector rod 24 to move simultaneously, thereby forming a demolding operation.

[0031] In this embodiment, the slide rail mechanism includes two demoulding slide rails 13 which are parallel to each other and open upward and are fixed on the upper surface of the discharge seat 14, and a boss slider 16 is fixed at one end of the two demoulding slide rails 13 close to the mold frame 10, and the top of the boss slider 16 is fixed on the mold frame 10; by setting the boss slider 16, it can be ensured that the demoulding is done by pulling it out horizontally, ensuring that the motor housing is demoulded smoothly.

[0032] In this embodiment, two buffer springs parallel to each other are fixed on the side of one of the boss sliders 16 away from the mold 11, and the same contact piece 17 is fixed to the ends of the two buffer springs. A contact head 18 matched with the contact piece 17 is fixed to the upper surface of the demoulding slide rail 13 on the same side. The two contact pieces 17 are connected in series in the circuit of the electromagnet. When the main body is demoulded to a certain position, the contact piece 17 will simultaneously stick to the two contact heads 18, and then connect the circuit. At this time, the circuit can be triggered to energize the electromagnet, and then start to drive the ejector rod 24 to start.

[0033] In this embodiment, a sealed bearing is embedded in the middle of the end of the injection cylinder 4 away from the insulation head 9, and the shaft of the advancement screw 23 passes through the sealed bearing and is fixed with a driven gear 3, a servo motor 2 is fixed to the lower surface of the end of the base 1, and a driving gear meshing with the driven gear 3 is fixed to the top of the output shaft of the servo motor 2; the diameter of the driving gear is smaller than the driven gear 3; it can provide a more precise advancement amount, and can also prevent inertial injection by reverse rotation.

[0034] When the utility model is working, the mixed plastic masterbatch to be injected is poured into the raw material barrel 5, and the inflation mechanism is started to run slowly. At this time, the air pressure barrel 7 slowly ventilates the interior of the insulation head 9, thereby ensuring that the end of the injection cylinder 4 is at a high temperature under the static injection state; once the injection is normally performed, the inflation mechanism is accelerated. At this time, under the action of the toggle block, the knocking block accelerates the knocking of the raw material barrel 5 to maintain fast and smooth material discharge, and the air pressure barrel 7 injects a high-speed airflow to quickly take away the internal temperature of the insulation head 9, reduce the end temperature, and ensure that the temperature of the plastic in the molten state at each position is consistent; after the injection is completed, the rotation of the advancing screw 23 can be stopped, and demoulding can be started; when the main body is demoulded to a certain position, that is, the extension rod of the hydraulic ejector 12 pulls the movable mold frame 10 back to the extreme position, at this time, the contact piece 17 will simultaneously stick to the two contact heads 18, and then connect the circuit, at this time, the circuit can be triggered to energize the electromagnet, and then the ejector rod 24 starts to start demoulding.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A motor housing injection molding device, comprising a base (1) fixed on a counterweight platform by anchor bolts, an injection molding cylinder (4) which is consistent with the length direction of the base (1) is fixed on the upper surface of the base (1), a material discharge seat (14) is also fixed on the upper surface of the counterweight platform at the end of the base (1), a slide rail mechanism is arranged on the upper surface of the material discharge seat (14), and a mold mechanism which is compatible with the injection molding cylinder (4) is slidably connected to the slide rail mechanism; characterized in that: The injection molding cylinder (4) is in the shape of a syringe as a whole, and a heat preservation head (9) is sleeved and fixed on the circumferential outer wall of the injection molding cylinder (4) near the injection port, the heat preservation head (9) is in the shape of a conical cylinder as a whole, and a heating ring (22) of an annular structure is fixed inside the heat preservation head (9), an air inlet pipe is inserted into the circumferential outer wall of the heat preservation head (9) near the top end, and an air outlet hole (91) is opened on the circumferential outer wall of the heat preservation head (9) away from the air inlet pipe; the inside of the injection molding cylinder (4) A propulsion screw (23) is rotatably connected, and a feed port (401) is formed on the outer wall of the injection molding cylinder (4) at one end away from the heat preservation head (9), a vertical raw material barrel (5) is inserted at the top of the feed port (401), and an inflation mechanism is arranged on the outer wall of the injection molding cylinder (4) between the air inlet pipe and the feed port (401), the inflation mechanism comprises an air pressure barrel (7) fixed on the outer wall of the injection molding cylinder (4), and an air supply pipe (8) is arranged between the air outlet end of the air pressure barrel (7) and the air inlet pipe.

2. The motor housing injection molding device according to claim 1, characterized in that: The raw material barrel (5) is in a funnel-shaped structure as a whole, and a swing spring (20) is fixed to the outer wall of the narrow neck of the raw material barrel (5), and a knocking block is fixed to the end of the swing spring (20) away from the raw material barrel (5). The inflation mechanism also includes a motor frame fixed to the side of the injection cylinder (4), and a driving motor (15) is fixed to the top of the motor frame, and a wheel (6) is fixed to the top of the output shaft of the driving motor (15), and a protruding toggle block is fixed to the circumferential outer wall of the wheel disc (6), and when the toggle block rotates to the knocking block, the knocking block will be temporarily toggled downward.

3. The motor housing injection molding device according to claim 2, characterized in that: The inflation mechanism also includes a piston disc slidably connected in the air pressure barrel (7), and a connecting rod is hinged on the side of the piston disc away from the barrel bottom, and the end of the connecting rod close to the wheel disc (6) is connected to the surface of the wheel disc (6); an annular groove is formed on the circumferential outer wall of the piston disc, and a one-way sealing ring is sleeved in the annular groove.

4. The motor housing injection molding device according to claim 3, characterized in that: The mold mechanism comprises two mutually parallel and vertical mold frames (10), and a mutually interlocking mold (11) is fixed between the two mold frames (10), and a plurality of mutually parallel ejector rods (24) are slidably connected inside the mold (11), and the same ejector disk (21) is fixed to one end of the ejector rod (24) away from the heat preservation head (9), a return spring (19) is fixed between the ejector disk (21) and the mold (11), and a permanent magnet is embedded in the middle of the ejector disk (21), and a hydraulic ejector rod (12) is fixed to one end of the mold frame (10) away from the injection molding cylinder (4), and a notch is opened at the end of the extension rod of the hydraulic ejector rod (12), and an electromagnet is fixed in the notch.

5. The motor housing injection molding device according to claim 4, characterized in that: The slide rail mechanism comprises two demoulding slide rails (13) which are parallel to each other and open upward and are fixed on the upper surface of the material discharge seat (14), and a boss slider (16) is fixed at one end of the two demoulding slide rails (13) close to the mold frame (10), and the top end of the boss slider (16) is fixed on the mold frame (10).

6. The motor housing injection molding device according to claim 5, characterized in that: Two buffer springs parallel to each other are fixed on the side of one of the boss sliders (16) away from the mold (11), and the ends of the two buffer springs are fixed with the same contact piece (17), and the upper surface of the demoulding slide rail (13) on the same side is fixed with a contact head (18) adapted to the contact piece (17).

7. The motor housing injection molding device according to claim 1, characterized in that: A sealed bearing is embedded in the middle of one end of the injection molding cylinder (4) away from the heat preservation head (9), and the shaft of the advancing screw (23) passes through the sealed bearing and is fixed with a driven gear (3). A servo motor (2) is fixed to the lower surface of the end of the base (1), and a driving gear meshing with the driven gear (3) is fixed to the top end of the output shaft of the servo motor (2); the diameter of the driving gear is smaller than that of the driven gear (3).

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