Injection mold for precise plastic part of electric appliance

Abstract

The invention discloses an electric appliance precise plastic part injection mold in the technical field of injection molds. The electric appliance precise plastic part injection mold comprises an inner mold body, a front mold plate, an upper mold plate, a lower mold plate, a left mold plate and a right mold plate. The inner mold body is sleeved with a fixing plate, and the inner mold body is in sliding connection with the fixing plate. A demolding mechanism is arranged on the frame-shaped mold and is used for driving the upper mold plate, the lower mold plate, the left mold plate and the right mold plate to be separated from the shell firstly during demolding; a cutting mechanism is arranged on the frame-shaped mold and used for automatically cutting off the redundant part, located at the joint of the injection molding pipes, of the shell after the frame-shaped mold is separated from the shell. A first driving mechanism is arranged in front of the frame-shaped mold and is used for driving the demolding mechanism and the cutting mechanism to operate; according to the device, after the frame-shaped mold is separated from the shell, the shell can be separated from the inner mold by driving the inner mold to move backwards relative to the fixed plate, so that the demolding of the shell can be conveniently completed.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for precision plastic parts of electrical appliances. Background Art

[0002] Most of the existing electrical precision parts need to be packaged in plastic shells, which can protect the electrical parts very well. Plastic shells are usually produced by injection molding. During injection molding, two inner and outer molds are generally used together for injection molding. The molded shell will be located between the two molds. During demolding, it is more laborious because the contact area between the outer mold and the shell is large. In addition, after the shell is formed, there will be excess waste on the surface of the shell at the injection port, which will affect the quality of the injection molded product. Summary of the invention

[0003] The object of the present invention is to provide an injection mold for precision plastic parts of electrical appliances to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection mold for precision plastic parts of an electrical appliance, comprising an inner mold, a front mold plate, an upper mold plate, a lower mold plate, a left mold plate and a right mold plate; a fixed plate is sleeved on the inner mold and the inner mold is slidably connected to the fixed plate; the front mold plate, the upper mold plate, the lower mold plate, the left mold plate and the right mold plate of the inner mold are combined to form a frame-shaped mold, the frame-shaped mold is sleeved on the inner mold and the rear side of the assembled frame-shaped mold is in contact with the fixed plate; a plurality of injection tubes are fixedly connected to the front position of the front mold plate;

[0005] The frame-shaped mold is provided with a demoulding mechanism, and the demoulding mechanism is used to drive the upper mold plate, the lower mold plate, the left mold plate and the right mold plate to be separated from the shell first during demoulding;

[0006] The frame-shaped mold is provided with a cutting mechanism, and the cutting mechanism is used to automatically cut off the redundant part of the shell at the connection of the injection tube after the frame-shaped mold is separated from the shell;

[0007] A first driving mechanism is provided in front of the frame-shaped mold, and the first driving mechanism is used to drive the demoulding mechanism and the cutting mechanism to operate.

[0008] Preferably, the demolding mechanism includes two first connecting frames and two second connecting frames, the two first connecting frames are symmetrically distributed at the upper and lower sides of the front template and the two first connecting frames are fixedly connected to the front template; the two second connecting frames are symmetrically distributed at the left and right sides of the front template and the two second connecting frames are fixedly connected to the front template; the first connecting frame is rotatably connected with a rotating frame, and the rotating frames on the upper and lower sides are respectively fixedly connected to the upper template and the lower template; the second connecting frame is slidably connected with a sliding block and the second connecting frame is sleeved with a first spring, one end of the first spring is fixedly connected to the sliding block and the other end is fixedly connected to the second connecting frame; the sliding blocks on the left and right sides are respectively fixedly connected to the left template and the right template; the first connecting frame is provided with a rotating mechanism, and the rotating mechanism is used to drive the rotating frame to rotate relative to the first connecting frame; the rotating frame is provided with a locking mechanism, and the locking mechanism is used to lock the left template and the right template when the upper template and the lower template are in a closed state.

[0009] Preferably, the rotating mechanism includes a first worm, which is rotatably connected to the first connecting frame and meshed with a first worm wheel, and the first worm wheel is fixedly connected to the first connecting frame; a driving rod is fixedly connected to the front end of the first worm.

[0010] Preferably, the locking mechanism includes two extension rods, which are symmetrically distributed on the left and right sides of the first connecting frame and are fixedly connected to the first connecting frame; an arc rod is fixedly connected to the extension rod, and the part of the arc rod away from one end of the extension rod is protruding outward, and a first push rod is provided at the outer side of the arc rod, the first push rod is fitted with the arc rod, and the first push rods on the left and right sides are fixedly connected to the left template and the right template respectively; a second push rod is fixedly connected to the arc rod, and the second push rods on the left and right sides are fitted with the left template and the right template respectively.

[0011] Preferably, the cutting mechanism includes a first connecting plate, which is located in front of the front template and is symmetrically rotatably connected to a rotating drum at the upper and lower sides of the first connecting plate, and the rotating drum passes through the front template and is loosely fitted with the front template; the rear end surface of the rotating drum is flush with the rear surface of the front template and a second spring is sleeved on the rotating drum, one end of the second spring is fixedly connected to the first connecting plate and the other end is fixedly connected to the front template; a cutting knife is provided in the rotating drum, and an extending mechanism is provided on the cutting knife, and the extending mechanism is used to extend the cutting knife to cut shell waste; a second driving mechanism is provided on the first connecting plate, and the second driving mechanism is used to drive the extending mechanism to operate; a rotating mechanism is provided on the first connecting plate, and the rotating mechanism is used to drive the two rotating drums to rotate.

[0012] Preferably, the extending mechanism includes a rotating rod, which is located inside the rotating drum and is rotatably connected to the rotating drum; a fixed frame is fixedly connected to the rotating rod, and the cutting knife is located in the fixed frame and is rotatably connected to the fixed frame; a second worm is rotatably connected to the rotating rod, a second worm wheel is meshed with the second worm, and the second worm wheel is coaxially fixedly connected to a first bevel gear, and the first bevel gear and the second worm wheel are both rotatably connected to the rotating rod; a second bevel gear is meshed with the first bevel gear, the second bevel gear is rotatably connected to the fixed frame and the second bevel gear is fixedly connected to the cutting knife; gears are fixedly connected to both ends of the second worm, and an arc-shaped rack is fixedly connected to the inner wall of the rotating drum at a position close to the gears on both sides, and the arc-shaped rack is meshed with the gears.

[0013] Preferably, the second driving mechanism includes a second connecting plate, the second connecting plate is located in the front position of the first connecting plate and the two first cylinders are fixedly connected to the second connecting plate, the telescopic end of the first cylinder is fixedly connected to the first connecting plate; a first sliding rod is sleeved at both ends of the second connecting plate, the first sliding rod and the second connecting plate are loosely matched, and the two first sliding rods are respectively fixedly connected to the two rotating drums; a connecting ring is sleeved on the first sliding rod, the connecting ring and the first sliding rod are loosely matched and the connecting ring is rotatably connected to the second connecting plate, the connecting ring is fixedly connected to the second sliding rod, the second sliding rod is slidably connected to the rotating drum and the second sliding rod passes through the rotating drum, the second sliding rod is rotatably connected to a connecting rod at one end inside the rotating drum, and the rear end of the connecting rod is rotatably connected to the rotating rod; a torsion spring is provided at the connection between the rotating rod and the rotating drum.

[0014] Preferably, the rotating mechanism includes a fixed frame, which is fixedly connected to the first connecting plate and a motor is fixedly connected inside the fixed frame, the rear end of the motor output shaft is fixedly connected to a first pulley, and a belt is provided on the first pulley; the front end of the first slide rod is fixedly connected to a second pulley, and the belt is engaged with the first pulley and the two second pulleys at the same time.

[0015] Preferably, the first driving mechanism includes a second cylinder and four third cylinders, the telescopic end of the second cylinder is fixedly connected to a push frame, and threaded rods are symmetrically provided on the upper and lower sides of the push frame, the threaded rods are matched with the push frame threads and the threaded rods are not self-locking; the two threaded rods are respectively fixedly connected to the two driving rods; the upper and lower side parts of the push frame are respectively located directly in front of the upper and lower side parts of the first connecting plate; the four third cylinders are all fixedly connected to the push frame, and the rear end of the third cylinder is fixedly connected to the front template.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention starts the first driving mechanism, which first drives the demoulding mechanism to operate, and the demoulding mechanism can simultaneously drive the upper template, the lower template, the left template and the right template to be separated from the molded shell first; then the first driving mechanism drives the cutting mechanism to operate, and the cutting mechanism first drives the front template to be separated from the shell. After the shell is separated from the front template, there will be excess waste when the shell is located at the injection molding position of the injection tube. At this time, the cutting mechanism can automatically cut off the excess waste, which is convenient for subsequent centralized recycling and reuse of the waste and can also improve the quality of the injection molded products; after the frame-shaped mold is separated from the shell, the shell can be separated from the inner mold by driving the inner mold to move backward relative to the fixed plate, so that the demoulding of the shell can be completed more conveniently.

[0018] 2. The present invention drives the two first cylinders to drive the second connecting plate to move backward, and the second connecting plate drives the second sliding rod to move backward. Under the action of the torsion spring, the rotating rod in the rotating drum will start to rotate automatically and finally rotate to a state perpendicular to the rotating drum. At this time, stopping the two second cylinders can lock the rotating rod in a state perpendicular to the rotating drum, and then starting the motor to drive the two rotating drums to rotate. When the rotating drum rotates, it can be separated from the shell and drive the cutting knife to cut off the excess part of the shell, which can effectively improve the overall quality of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the split structure of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the cutting mechanism in the present invention;

[0023] Figure 5 It is a schematic diagram of the split structure of the cutting mechanism in the present invention;

[0024] Figure 6 is a schematic structural diagram of the second driving mechanism in the present invention;

[0025] Figure 7 It is a schematic cross-sectional structural diagram of the rotary drum in the present invention;

[0026] Figure 8 for Figure 7 A is a schematic diagram of the enlarged structure of the middle part;

[0027] Fig. 9 It is a structural schematic diagram of the extension mechanism in the present invention.

[0028] The reference numerals are as follows:

[0029] 1. Inner mold; 2. Front mold; 3. Upper mold; 4. Lower mold; 5. Left mold; 6. Right mold; 7. Fixed plate; 8. Injection tube; 9. First connecting frame; 10. Second connecting frame; 11. Rotating frame; 12. Sliding block; 13. First spring; 14. First worm; 15. First worm wheel; 16. Driving rod; 17. Extension rod; 18. Arc rod; 19. First ejector rod; 20. Second ejector rod; 21. First connecting plate; 22. Rotating drum; 23. Cutting knife; 24. Rotating rod; 25. Fixed frame; 26, second worm; 27, second worm wheel; 28, first bevel gear; 29, second bevel gear; 30, arc rack; 31, second connecting plate; 32, first cylinder; 33, first slide bar; 34, connecting ring; 35, second slide bar; 36, connecting rod; 37, fixed frame; 38, motor; 39, first pulley; 40, belt; 41, second pulley; 42, second cylinder; 43, push frame; 44, threaded rod; 45, third cylinder; 46, second spring; 47, gear. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 9 The present invention provides a technical solution: an injection mold for precision plastic parts of an electrical appliance, comprising an inner mold 1, a front mold plate 2, an upper mold plate 3, a lower mold plate 4, a left mold plate 5 and a right mold plate 6; a fixed plate 7 is sleeved on the inner mold 1 and the inner mold 1 is slidably connected to the fixed plate 7; the front mold plate 2, the upper mold plate 3, the lower mold plate 4, the left mold plate 5 and the right mold plate 6 of the inner mold 1 are combined to form a frame-shaped mold, the frame-shaped mold is sleeved on the inner mold 1 and the rear side of the assembled frame-shaped mold is in contact with the fixed plate 7; a plurality of injection tubes 8 are fixedly connected to the front position of the front mold plate 2;

[0031] The frame-shaped mold is provided with a demoulding mechanism, which is used to drive the upper mold plate 3, the lower mold plate 4, the left mold plate 5 and the right mold plate 6 to be separated from the shell first during demoulding;

[0032] The frame-shaped mold is provided with a cutting mechanism, which is used to first drive the front template 2 and the shell to separate and then automatically cut off the excess part of the shell at the connection of the injection tube 8 after the front template 2 and the shell are separated;

[0033] A first driving mechanism is provided in front of the frame-shaped mold, and the first driving mechanism is used to drive the demoulding mechanism and the cutting mechanism to operate;

[0034] During operation, the formed frame-shaped mold is buckled on the inner mold 1 and the frame-shaped mold is fitted with the fixed plate 7. At this time, the injection molding equipment is started to inject the injection molding raw materials between the frame-shaped mold and the inner mold 1 through multiple injection molding tubes 8 and fill the gap between the frame-shaped mold and the inner mold 1; when the injection molded shell is cooled, the first driving mechanism is started at this time, and the first driving mechanism first drives the demoulding mechanism to operate, and the upper template 3, the lower template 4, the left template 5 and the right template 6 can be driven to separate from the molded shell at the same time through the demoulding mechanism; then the first driving mechanism drives the cutting mechanism to operate, and the cutting mechanism first drives the front template 2 to separate from the shell. After the shell is separated from the front template 2, there will be excess waste when the shell is located at the injection molding position of the injection molding tube 8. At this time, the cutting mechanism can automatically cut off the excess waste, thereby ensuring the quality of the injection molded product; after the frame-shaped mold is separated from the shell, the shell can be separated from the inner mold 1 by driving the inner mold 1 to move backward relative to the fixed plate 7.

[0035] like Figure 1-4 As shown, as a further solution of the present invention, the demoulding mechanism includes two first connecting frames 9 and two second connecting frames 10, the two first connecting frames 9 are symmetrically distributed at the upper and lower sides of the front template 2 and the two first connecting frames 9 are fixedly connected to the front template 2; the two second connecting frames 10 are symmetrically distributed at the left and right sides of the front template 2 and the two second connecting frames 10 are fixedly connected to the front template 2; the first connecting frame 9 is rotatably connected to a rotating frame 11, and the upper and lower rotating frames 11 are respectively fixedly connected to the upper template 3 and the lower template 4; the second connecting frame 1 0 is slidably connected with a sliding block 12 and a first spring 13 is sleeved on the second connecting frame 10, one end of the first spring 13 is fixedly connected to the sliding block 12 and the other end is fixedly connected to the second connecting frame 10; the sliding blocks 12 on the left and right sides are respectively fixedly connected to the left template 5 and the right template 6; the first connecting frame 9 is provided with a rotating mechanism, and the rotating mechanism is used to drive the rotating frame 11 to rotate relative to the first connecting frame 9; the rotating frame 11 is provided with a locking mechanism, and the locking mechanism is used to lock the left template 5 and the right template 6 when the upper template 3 and the lower template 4 are in a closed state;

[0036] The rotating mechanism includes a first worm 14, which is rotatably connected to the first connecting frame 9 and meshed with a first worm wheel 15, which is fixedly connected to the first connecting frame 9; a driving rod 16 is fixedly connected to the front end of the first worm 14;

[0037] The locking mechanism includes two extension rods 17, which are symmetrically distributed on the left and right sides of the first connecting frame 9 and are fixedly connected to the first connecting frame 9; an arc rod 18 is fixedly connected to the extension rod 17, and the arc rod 18 is protruding outward at one end away from the extension rod 17. A first push rod 19 is provided at the outer side of the arc rod 18, and the first push rod 19 is fitted with the arc rod 18. The first push rods 19 on the left and right sides are fixedly connected to the left template 5 and the right template 6 respectively; a second push rod 20 is fixedly connected to the arc rod 18, and the second push rods 20 on the left and right sides are fitted with the left template 5 and the right template 6 respectively;

[0038] During operation, by driving the driving rods 16 on the upper and lower sides to rotate, the driving rods 16 will drive the first worm 14 to rotate, and when the first worm 14 rotates, it will drive the rotating frames 11 on the upper and lower sides to rotate, and the rotating frames 11 on the upper and lower sides will respectively drive the upper template 3 to rotate upward and the lower template 4 to rotate downward, and the upper template 3 and the lower template 4 will begin to separate from the shell at this time; when the rotating frames 11 on the upper and lower sides rotate, the rotating frames 11 will drive the arc rod 18 and the second push rod 20 to move through the extension rod 17, and the second push rods 20 on the left and right sides will slowly separate from the left template 5 and the right template 6; when the left and right sides After the second ejector 20 is separated from the left template 5 and the right template 6, the protruding part of the arc rod 18 begins to contact the first ejector 19. As the arc rod 18 continues to move, the arc rod 18 will begin to squeeze the first ejector 19 to the outside, and the first ejector 19 on the left and right sides will respectively drive the left template 5 to move left and the right template 6 to move right, and the left template 5 and the right template 6 will automatically separate from the shell; when the upper template 3, the lower template 4, the left template 5 and the right template 6 are all separated from the shell, it can be ensured that the shell will be sleeved on the inner mold 1, thereby facilitating the cleaning of excess waste on the shell.

[0039] like Figure 5-9 As shown, as a further solution of the present invention, the cutting mechanism includes a first connecting plate 21, the first connecting plate 21 is located in front of the front template 2 and the first connecting plate 21 is symmetrically rotatably connected with a rotating drum 22 at the upper and lower sides, the rotating drum 22 passes through the front template 2 and is clearance-matched with the front template 2; the rear end surface of the rotating drum 22 is flush with the rear surface of the front template 2 and a second spring 46 is sleeved on the rotating drum 22, one end of the second spring 46 is fixedly connected to the first connecting plate 21 and the other end is fixedly connected to the front template 2; a cutting knife 23 is arranged in the rotating drum 22, and an extension mechanism is arranged on the cutting knife 23, and the extension mechanism is used to extend the cutting knife 23 to cut the shell waste; a second driving mechanism is arranged on the first connecting plate 21, and the second driving mechanism is used to drive the extension mechanism to operate; a rotating mechanism is arranged on the first connecting plate 21, and the rotating mechanism is used to drive the two rotating drums 22 to rotate;

[0040] The stretching mechanism includes a rotating rod 24, which is located inside the rotating drum 22 and is rotatably connected to the rotating drum 22; a fixing frame 25 is fixedly connected to the rotating rod 24, and the cutting knife 23 is located inside the fixing frame 25 and is rotatably connected to the fixing frame 25; a second worm 26 is rotatably connected to the rotating rod 24, a second worm gear 27 is meshed with the second worm 26, and a first bevel gear 28 is coaxially fixedly connected to the second worm gear 27, and the first bevel gear 28 and the second worm gear 27 are both rotatably connected to the rotating rod 24; a second bevel gear 29 is meshed with the first bevel gear 28, the second bevel gear 29 is rotatably connected to the fixing frame 25, and the second bevel gear 29 is fixedly connected to the cutting knife 23; gears 47 are fixedly connected to both ends of the second worm 26, and arc-shaped racks 30 are fixedly connected to the inner wall of the rotating drum 22 at positions close to the gears 47 on both sides, and the arc-shaped racks 30 are meshed with the gears 47;

[0041] The second driving mechanism includes a second connecting plate 31, the second connecting plate 31 is located in the front position of the first connecting plate 21 and the second connecting plate 31 is fixedly connected with two first cylinders 32, the telescopic end of the first cylinder 32 is fixedly connected to the first connecting plate 21; a first sliding rod 33 is sleeved at both ends of the second connecting plate 31, the first sliding rod 33 and the second connecting plate 31 are clearance-matched, and the two first sliding rods 33 are respectively fixedly connected to the two rotating drums 22; a connecting ring 34 is sleeved on the first sliding rod 33, the connecting ring 34 and the first sliding rod 33 clearance-matched and the connecting ring 34 and the second connecting plate 31 are rotatably connected to the second sliding rod 35, the second sliding rod 35 is slidably connected to the rotating drum 22 and the second sliding rod 35 passes through the rotating drum 22, the second sliding rod 35 is located at one end inside the rotating drum 22 and is rotatably connected to a connecting rod 36, and the rear end of the connecting rod 36 is rotatably connected to the rotating rod 24; a torsion spring is provided at the connection position of the rotating rod 24 and the rotating drum 22;

[0042] During operation, after the upper template 3, the lower template 4, the left template 5 and the right template 6 are all separated from the shell, the front template 2 is driven to move forward relative to the first connecting plate 21, the rotating drum 22 is against the shell, and the front template 2 is separated from the shell; when the front template 2 moves to the position closest to the first connecting plate 21, the two first cylinders 32 are driven, and the two first cylinders 32 drive the second connecting plate 31 to move in the direction close to the first connecting plate 21, and the second connecting plate 31 drives the two second sliding rods 35 to move backward through the two connecting rings 34 respectively. When the second sliding rod 35 moves backward, under the action of the torsion spring, the rotating rod 24 in the rotating drum 22 will start to rotate automatically and finally rotate to a state perpendicular to the rotating drum 22. At this time, stopping the two second cylinders 42 can lock the rotating rod 24 in a state perpendicular to the rotating drum 22;

[0043] When the rotating rod 24 rotates, the gear 47 will mesh with the arc rack 30 and drive the second worm 26 to rotate under the action of the arc rack 30. When the second worm 26 rotates, it drives the second worm wheel 27 to rotate. The second worm wheel 27 drives the first bevel gear 28 to rotate. The first bevel gear 28 drives the second bevel gear 29 to rotate. The second bevel gear 29 drives the cutting knife 23 to rotate relative to the fixed frame 25. After the rotating rod 24 rotates ninety degrees relative to the rotating drum 22, the cutting knife 23 also rotates ninety degrees relative to the fixed frame 25. At this time, the cutting knife 23 is just attached to the surface of the shell.

[0044] like Figure 6 As shown, as a further solution of the present invention, the rotating mechanism includes a fixed frame 37, the fixed frame 37 is fixedly connected to the first connecting plate 21 and a motor 38 is fixedly connected inside the fixed frame 37, a first pulley 39 is fixedly connected to the rear end of the output shaft of the motor 38, and a belt 40 is provided on the first pulley 39; a second pulley 41 is fixedly connected to the front end of the first slide bar 33, and the belt 40 is meshed with the first pulley 39 and the two second pulleys 41 at the same time;

[0045] During operation, when the cutting knife 23 is attached to the surface of the shell, the motor 38 is started, the motor 38 drives the first pulley 39 to rotate, the first pulley 39 drives the two second pulleys 41 to rotate through the belt 40, and the second pulleys 41 drive the rotating drum 22 to rotate through the first slide bar 33. When the rotating drum 22 rotates, it will first separate from the shell and drive the cutting knife 23 to cut off the waste left by the injection molding of the injection tube 8.

[0046] like Figure 3 As shown, as a further solution of the present invention, the first driving mechanism includes a second cylinder 42 and four third cylinders 45, the telescopic end of the second cylinder 42 is fixedly connected to a push frame 43, and threaded rods 44 are symmetrically arranged at the upper and lower sides of the push frame 43, the threaded rods 44 are threadedly matched with the push frame 43 and the threaded rods 44 are not self-locking; the two threaded rods 44 are respectively fixedly connected to the two driving rods 16; the upper and lower side parts of the push frame 43 are respectively located in front of the upper and lower side parts of the first connecting plate 21; the four third cylinders 45 are all fixedly connected to the push frame 43, and the rear end of the third cylinder 45 is fixedly connected to the front template 2;

[0047] During operation, the push frame 43 can be driven to move backward by starting the four third cylinders 45. The second cylinder 42 is started at the same time as the third cylinder 45, so that the second cylinder 42 can extend as the push frame 43 moves backward; when the push frame 43 moves backward, it will drive the threaded rods 44 on the upper and lower sides to rotate, and the threaded rods 44 on the upper and lower sides will respectively drive the driving rods 16 on the upper and lower sides to rotate; when the push frame 43 disengages from the threaded rods 44 and moves to the rear position of the threaded rods 44, the threaded rods 44 stop rotating, and at this time the push frame 43 just fits the upper and lower sides of the first connecting plate 21. As the four third cylinders 45 continue to run, the push frame 43 is held back by the first connecting plate 21 and the two rotating drums 22, so the push frame 43 cannot continue to move backward, and the four third cylinders 45 begin to pull the front template 2 forward, and the front template 2 will be separated from the shell.

Claims

1. An injection mold for precision plastic parts of electrical appliances, comprising an inner mold (1), a front mold plate (2), an upper mold plate (3), a lower mold plate (4), a left mold plate (5) and a right mold plate (6), characterized in that: A fixing plate (7) is sleeved on the inner mold (1), and the inner mold (1) is slidably connected to the fixing plate (7); the front mold plate (2), the upper mold plate (3), the lower mold plate (4), the left mold plate (5) and the right mold plate (6) of the inner mold (1) are combined to form a frame-shaped mold, and the frame-shaped mold is sleeved on the inner mold (1), and the rear side of the assembled frame-shaped mold is in contact with the fixing plate (7); a plurality of injection tubes (8) are fixedly connected to the front position of the front mold plate (2); The frame-shaped mold is provided with a demoulding mechanism, and the demoulding mechanism is used to drive the upper mold plate (3), the lower mold plate (4), the left mold plate (5) and the right mold plate (6) to be separated from the shell body first during demoulding; The frame-shaped mold is provided with a cutting mechanism, and the cutting mechanism is used to automatically cut off the redundant part of the shell at the connection of the injection molding tube (8) after the frame-shaped mold is separated from the shell; A first driving mechanism is provided in front of the frame-shaped mold, and the first driving mechanism is used to drive the demoulding mechanism and the cutting mechanism to operate.

2. According to claim 1, an injection mold for precision plastic parts of electrical appliances, characterized in that: The demoulding mechanism comprises two first connecting frames (9) and two second connecting frames (10), wherein the two first connecting frames (9) are symmetrically distributed at upper and lower sides of the front template (2) and the two first connecting frames (9) are fixedly connected to the front template (2); the two second connecting frames (10) are symmetrically distributed at left and right sides of the front template (2) and the two second connecting frames (10) are fixedly connected to the front template (2); the first connecting frame (9) is rotatably connected with a rotating frame (11), and the rotating frames (11) at upper and lower sides are respectively fixedly connected to the upper template (3) and the lower template (4); the second connecting frame (10) is slidably connected with a sliding frame (11). The movable block (12) and the second connecting frame (10) are sleeved with a first spring (13), one end of the first spring (13) is fixedly connected to the sliding block (12) and the other end is fixedly connected to the second connecting frame (10); the sliding blocks (12) on the left and right sides are respectively fixedly connected to the left template (5) and the right template (6); the first connecting frame (9) is provided with a rotating mechanism, and the rotating mechanism is used to drive the rotating frame (11) to rotate relative to the first connecting frame (9); the rotating frame (11) is provided with a locking mechanism, and the locking mechanism is used to lock the left template (5) and the right template (6) when the upper template (3) and the lower template (4) are in a closed state.

3. According to claim 2, an injection mold for precision plastic parts of electrical appliances, characterized in that: The rotating mechanism comprises a first worm (14), the first worm (14) is rotatably connected to a first connecting frame (9), a first worm wheel (15) is meshed on the first worm (14), and the first worm wheel (15) is fixedly connected to the first connecting frame (9); a driving rod (16) is fixedly connected to the front end of the first worm (14).

4. The electrical precision plastic parts injection mold according to claim 2, characterized in that: The locking mechanism comprises two extension rods (17), the two extension rods (17) are symmetrically distributed on the left and right sides of the first connecting frame (9), and the two extension rods (17) are fixedly connected to the first connecting frame (9); an arc rod (18) is fixedly connected to the extension rod (17), and the arc rod (18) is protruding outward at one end away from the extension rod (17); a first push rod (19) is arranged at the outer side of the arc rod (18), the first push rod (19) is fitted with the arc rod (18), and the first push rods (19) on the left and right sides are fixedly connected to the left template (5) and the right template (6) respectively; a second push rod (20) is fixedly connected to the arc rod (18), and the second push rods (20) on the left and right sides are fitted with the left template (5) and the right template (6) respectively.

5. The electrical precision plastic parts injection mold according to claim 3, characterized in that: The cutting mechanism comprises a first connecting plate (21), the first connecting plate (21) is located in front of the front template (2) and the first connecting plate (21) is symmetrically rotatably connected to a rotating drum (22) at both sides thereof, the rotating drum (22) passes through the front template (2) and is clearance-matched with the front template (2); the rear end surface of the rotating drum (22) is flush with the rear surface of the front template (2) and a second spring (46) is sleeved on the rotating drum (22), one end of the second spring (46) is fixedly connected to the first connecting plate (21) and the other end is fixedly connected to the front template (2); a cutting knife (23) is arranged in the rotating drum (22), the cutting knife (23) is provided with an extension mechanism, the extension mechanism is used to extend the cutting knife (23) to cut the shell waste; the first connecting plate (21) is provided with a second driving mechanism, the second driving mechanism is used to drive the extension mechanism to operate; the first connecting plate (21) is provided with a rotating mechanism, the rotating mechanism is used to drive the two rotating drums (22) to rotate.

6. The electrical precision plastic parts injection mold according to claim 5, characterized in that: The stretching mechanism comprises a rotating rod (24), the rotating rod (24) being located inside the rotating drum (22) and being rotatably connected to the rotating drum (22); a fixing frame (25) being fixedly connected to the rotating rod (24), the cutting knife (23) being located inside the fixing frame (25) and being rotatably connected to the fixing frame (25); a second worm (26) being rotatably connected to the rotating rod (24), a second worm gear (27) being meshed with the second worm gear (26), the second worm gear (27) being coaxially fixedly connected to a first bevel gear (28), the first bevel gear The wheel (28) and the second worm gear (27) are both rotatably connected to the rotating rod (24); the first bevel gear (28) is meshed with a second bevel gear (29), the second bevel gear (29) is rotatably connected to the fixing frame (25), and the second bevel gear (29) is fixedly connected to the cutting knife (23); both ends of the second worm gear (26) are fixedly connected to gears (47), and the inner wall of the rotating drum (22) is fixedly connected to a position close to the gears (47) on both sides, and the arc-shaped rack (30) is meshed with the gear (47).

7. The electrical precision plastic parts injection mold according to claim 6, characterized in that: The second driving mechanism comprises a second connecting plate (31), the second connecting plate (31) is located in front of the first connecting plate (21) and two first cylinders (32) are fixedly connected to the second connecting plate (31), and the telescopic ends of the first cylinders (32) are fixedly connected to the first connecting plate (21); first sliding rods (33) are sleeved at both ends of the second connecting plate (31), the first sliding rods (33) and the second connecting plate (31) are clearance-matched, and the two first sliding rods (33) are respectively fixedly connected to the two rotating drums (22); the first sliding rods (33) are sleeved with connecting rods A connecting ring (34), wherein the connecting ring (34) and the first sliding rod (33) are loosely matched and the connecting ring (34) is rotatably connected to the second connecting plate (31); a second sliding rod (35) is fixedly connected to the connecting ring (34); the second sliding rod (35) is slidably connected to the rotating cylinder (22) and the second sliding rod (35) passes through the rotating cylinder (22); one end of the second sliding rod (35) located on the inner side of the rotating cylinder (22) is rotatably connected to a connecting rod (36); a rear end of the connecting rod (36) is rotatably connected to the rotating rod (24); a torsion spring is provided at the connection position between the rotating rod (24) and the rotating cylinder (22).

8. The injection mold for precision plastic parts of electrical appliances according to claim 7, characterized in that: The rotating mechanism comprises a fixed frame (37), the fixed frame (37) is fixedly connected to the first connecting plate (21), and a motor (38) is fixedly connected inside the fixed frame (37), a first belt pulley (39) is fixedly connected to the rear end of the output shaft of the motor (38), and a belt (40) is provided on the first belt pulley (39); a second belt pulley (41) is fixedly connected to the front end of the first sliding rod (33), and the belt (40) is meshed with the first belt pulley (39) and the two second belt pulleys (41) at the same time.

9. The electrical precision plastic parts injection mold according to claim 5, characterized in that: The first driving mechanism comprises a second cylinder (42) and four third cylinders (45), the telescopic end of the second cylinder (42) is fixedly connected to a push frame (43), and threaded rods (44) are symmetrically arranged on the upper and lower sides of the push frame (43), the threaded rods (44) are threadedly matched with the push frame (43) and the threaded rods (44) are not self-locking; the two threaded rods (44) are respectively fixedly connected to the two driving rods (16); the upper and lower side parts of the push frame (43) are respectively located in front of the upper and lower side parts of the first connecting plate (21); the four third cylinders (45) are all fixedly connected to the push frame (43), and the rear end of the third cylinder (45) is fixedly connected to the front template (2).

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