Preparation mold for injection molding automobile lampshade

Abstract

The present invention provides a preparation mold for injection molding automobile lampshades, and relates to the technical field of injection molding of auto parts, comprising: a U-shaped frame, wherein side support frames are fixedly arranged on both sides of the bottom of the U-shaped frame; a conveyor is fixedly arranged below the side support frames on both sides; a conveyor belt is rotatably arranged in the middle of the conveyor to cooperate with a rotating roller; a main mold body is fixedly arranged at the middle front end opening of the U-shaped frame; the present invention is provided with an inclined injection pipe, and a vacuum injection molding method is provided. A vacuum pump extracts air and extracts the air inside the cavity from the inclined injection pipe. After the extraction is completed, the solenoid valve B is closed, the solenoid valve A is opened, and the injection liquid is input into the inclined injection pipe through an injection molding machine, and the injection liquid is quickly and quantitatively filled into the cavity through negative pressure, and then the solenoid valve A is closed, and the electric cylinder is retracted to reset the blocked mold rod, while ensuring that the injection liquid enters the cavity, which can reduce bubbles and speed up the filling, thereby solving the problem that the existing mold is inconvenient for vacuum injection.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts injection molding, in particular to a preparation mold for injection molding automobile lampshades. Background Art

[0002] When processing and manufacturing automobile lampshades, an open-and-closed mold is generally used for manufacturing. The lampshade is cast by assembling two sets of molds that can be guided and merged to form a cavity in the shape of a lampshade. Generally, an injection molding machine is used to directly input liquid into the mold, and excess air is discharged through the exhaust hole to achieve casting.

[0003] The molds currently used have the following disadvantages:

[0004] 1. The mold made of open and close molds will discharge air through the exhaust holes during the injection molding process, which will easily retain bubbles, affect the quality of the lampshade, and lack the function of stable and bubble-free injection molding;

[0005] 2. Lack of control function to prevent the generation of injection molding flash;

[0006] 3. Lack of stable and controllable temperature control structure. Summary of the invention

[0007] In view of this, the present invention provides a preparation mold for injection molding automobile lampshades, which has the functions of vacuum injection molding and automatic demoulding, and a corresponding structure, which can realize automatic demoulding and has the function of automatically conveying and discharging the lampshade after demoulding.

[0008] The invention provides a preparation mold for injection molding an automobile lampshade, which specifically comprises: a U-shaped frame, wherein side support frames are fixedly arranged on both sides of the bottom of the U-shaped frame; a conveyor is fixedly arranged below the side support frames on both sides; a conveyor belt is rotatably arranged in the middle of the conveyor in cooperation with a rotating roller; a main mold body is fixedly arranged at the middle front end opening of the U-shaped frame; an inclined injection pipe inclined to one side is integrally arranged on the top of the main mold body, an assembly seat is integrally arranged on the outer end of the inclined injection pipe, and the outer plane of the assembly seat is parallel and aligned with a side plane of the inner mold cavity of the main mold body; solenoid valves A and solenoid valves B are respectively connected and arranged on both sides of the inclined injection pipe; and a movable mold body, wherein four groups of guide mold rods are fixedly arranged at the front end of the movable mold body, and an H-shaped frame is fixedly arranged at the corner where the guide mold rods pass through the main mold body.

[0009] Optionally, two combined mold hydraulic cylinders are fixedly arranged on the rear side of the U-shaped frame, and the telescopic ends of the combined mold hydraulic cylinders are fixedly connected to the two ends of the rear side of the movable mold body; the two ends of the rear side of the movable mold body are arranged as a stepped structure; an oil tank is fixedly arranged at the rear right side of the U-shaped frame, and a breathing adjustment hole is arranged on the top of the oil tank; a hydraulic pump is connected to the outlet end of the oil tank, and a pipeline is arranged at the outlet end of the oil tank to synchronously connect and control the two combined mold hydraulic cylinders.

[0010] Optionally, an eccentric channel is fixedly provided on the left front side of the conveyor, an impeller is rotatably provided in the middle of the eccentric channel in cooperation with a sealed bearing, and a rotating shaft of the impeller is coaxially connected to a rotating roller on the front side of the conveyor belt.

[0011] Optionally, four groups of spring rods A are fixedly arranged on the front side of the main mold body, and a demolding part A is slidably arranged on the outside of the four groups of spring rods A; the spring rods A are all sleeved with springs and pass through the demolding part A to set a baffle limit installation; a push rod A is fixedly arranged in the middle of the rear side of the demolding part A, and the push rod A slides in the main mold body and matches the inner cavity of the main mold body.

[0012] Optionally, a guide outer frame is fixedly provided on the top of the assembly seat; an electric cylinder is fixedly provided above the assembly seat, and a motor seat is fixedly provided at the telescopic end of the electric cylinder, and the motor seat is H-shaped and slides in the guide outer frame; a driving motor is fixedly provided above the motor seat; a blocking mold rod is provided in the inclined injection tube, and the driving motor is transmission-connected to the blocking mold rod, and the bottom end of the blocking mold rod can be aligned with the flat inclined surface of the mold cavity inside the main mold body.

[0013] Optionally, the position of the solenoid valve A is lower than that of the solenoid valve B; a pipeline is provided at the other end of the solenoid valve A to connect to the injection molding machine; and a pipeline is provided at the other end of the solenoid valve B to connect to the vacuum pump.

[0014] Optionally, four groups of spring rods B are fixedly provided at the rear end of the movable mold body, and demolding parts B are slidably provided on the outside of the four groups of spring rods B; the spring rods B are all sleeved with springs and pass through the demolding parts B to set baffle limit installations; a push rod B is fixedly provided in the middle of the front side of the demolding parts B, and the push rod B is consistent with the mold body surface of the movable mold body.

[0015] Optionally, a circulating water circuit is provided inside the main mold body and the movable mold body, and two groups of gooseneck pipes are provided above the circulating water circuits of the main mold body and the movable mold body to connect with each other; the gooseneck pipes are kept bent upward by the flexural force in the installation state.

[0016] Optionally, a water inlet pipe is connected to the water inlet on the right side of the circulating water circuit of the main mold body; and four groups of pipes are connected to the water inlet end of the conveyor at the water outlet on the left side of the circulating water circuit of the main mold body.

[0017] The beneficial effects are as follows:

[0018] 1. The present invention is provided with an inclined injection tube and provides a vacuum injection molding method. The vacuum pump draws air and extracts the air inside the cavity from the inclined injection tube. After the extraction is completed, the solenoid valve B is closed and the solenoid valve A is opened. The injection molding liquid is input into the inclined injection tube through the injection molding machine. The injection molding liquid is quickly and quantitatively filled into the cavity through negative pressure, and then the solenoid valve A is closed, and the electric cylinder is contracted to reset the blocked mold rod. At the same time, it is ensured that the injection molding liquid enters the cavity, which can reduce bubbles and speed up the filling.

[0019] 2. Setting a plugging mold rod can assist in shaping the lampshade, and the plugging mold rod can slide and rotate. Starting the driving motor to drive the plugging mold rod to rotate can separate the injection position of the plugging mold rod and the lampshade, and prevent flash from occurring during the shaping process.

[0020] 3. A circulating water circuit is arranged inside the main mold and the movable mold to control the temperature. A water pump is used to inject water into the water inlet pipe. The water circulates rapidly through the main mold and the movable mold to cool down the lampshade, thereby achieving heat dissipation and allowing the lampshade to solidify and shape quickly. After demolding, the formed lampshade will fall to the top of the conveyor belt. When the water circulates, it passes through the eccentric channel to drive the impeller in the eccentric channel to rotate, thereby driving the eccentric channel to rotate, transporting the lampshade backwards for automatic collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present invention is shown;

[0022] Figure 2 The isometric structural diagram of an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the top view of the structure of an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the side tilt structure of an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the demoulding state structure of an embodiment of the present invention is shown;

[0026] Figure 6 The embodiment of the present invention is shown Figure 5 A schematic diagram of the structure from another angle;

[0027] Figure 7 A schematic diagram of the three-dimensional structure of the main mold body in an embodiment of the present invention is shown;

[0028] Figure 8 The isometric structure diagram of the main mold body in the embodiment of the present invention is shown;

[0029] Fig. 9 The embodiment of the present invention is shown Figure 8 Schematic diagram of the cross-sectional structure.

[0030] Reference numerals list

[0031] 1. U-shaped frame; 101. Side support frame; 102. Clamping hydraulic cylinder; 103. Oil tank; 104. Hydraulic pump; 2. Conveyor; 201. Conveyor belt; 202. Eccentric channel; 3. Main mold body; 301. Spring rod A; 302. Demolding part A; 303. Push rod A; 304. Inclined injection pipe; 305. Assembly seat; 306. Guide outer frame; 307. Electric cylinder; 308. Motor seat; 309. Drive motor; 310. Blocking mold rod; 4. Solenoid valve A; 5. Solenoid valve B; 6. Movable mold body; 601. Guide mold rod; 602. H-shaped frame; 603. Spring rod B; 604. Demolding part B; 605. Push rod B; 7. Gooseneck pipe fitting; 8. Water inlet pipe. DETAILED DESCRIPTION

[0032] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0033] Embodiment 1:

[0034] Please refer to the attached figure in the instruction manual. Figures 1 to 9 As shown:

[0035] The present invention proposes a preparation mold for injection molding an automobile lampshade, comprising: a U-shaped frame 1, side support frames 101 are fixedly arranged on both sides of the bottom of the U-shaped frame 1; a conveyor 2 is fixedly arranged below between the side support frames 101 on both sides; a conveyor belt 201 is rotatably arranged in the middle of the conveyor 2 with a rotating roller; a main mold body 3 is fixedly arranged at the middle front end opening of the U-shaped frame 1; an inclined injection pipe 304 inclined to one side is integrally arranged on the top of the main mold body 3, and an assembly seat 305 is integrally arranged on the outer end of the inclined injection pipe 304, and the outer plane of the assembly seat 305 is parallel and aligned with a side plane of the inner mold cavity of the main mold body 3; solenoid valves A4 and solenoid valves B5 are respectively connected to the two sides of the inclined injection pipe 304; a movable mold body 6, four groups of guide mold rods 601 are fixedly arranged at the front end of the movable mold body 6, and an H-shaped frame 602 is fixedly arranged at the corner where the guide mold rods 601 pass through the main mold body 3.

[0036] Among them, two combined mold hydraulic cylinders 102 are fixedly arranged on the rear side of the U-shaped frame 1, and the telescopic ends of the mold closing hydraulic cylinders 102 are fixedly connected to the two ends of the rear side of the movable mold body 6; the two ends of the rear side of the movable mold body 6 are arranged as a stepped structure; an oil tank 103 is fixedly arranged at the rear right side of the U-shaped frame 1, and a breathing adjustment hole is arranged on the top of the oil tank 103; a hydraulic pump 104 is connected to the outlet end of the oil tank 103, and a pipeline is arranged at the outlet end of the oil tank 103 to synchronously connect and control the two combined mold hydraulic cylinders 102.

[0037] An eccentric channel 202 is fixedly provided on the left front side of the conveyor 2 , an impeller is rotatably provided in the middle of the eccentric channel 202 in cooperation with a sealed bearing, and the rotating shaft of the impeller is coaxially connected to the rotating roller on the front side of the conveyor belt 201 .

[0038] Among them, four groups of spring rods A301 are fixedly arranged on the front side of the main mold body 3, and demolding parts A302 are slidably arranged outside the four groups of spring rods A301; the spring rods A301 are all sleeved with springs and pass through the demolding parts A302 to set baffle limit installation; a push rod A303 is fixedly arranged in the middle of the rear side of the demolding part A302, and the push rod A303 slides in the main mold body 3 and matches the inner cavity of the main mold body 3.

[0039] Among them, a guide outer frame 306 is fixedly provided on the top of the assembly seat 305; an electric cylinder 307 is fixedly provided above the assembly seat 305, and a motor seat 308 is fixedly provided at the telescopic end of the electric cylinder 307, and the motor seat 308 is H-shaped and slides in the guide outer frame 306; a driving motor 309 is fixedly provided above the motor seat 308; a blocking mold rod 310 is provided in the inclined injection tube 304, and the driving motor 309 is transmission-connected to the blocking mold rod 310, and the bottom end of the blocking mold rod 310 can be aligned with the flat inclined surface of the internal mold cavity of the main mold body 3.

[0040] The position of the solenoid valve A4 is lower than that of the solenoid valve B5; a pipeline is arranged at the other end of the solenoid valve A4 to connect with the injection molding machine; and a pipeline is arranged at the other end of the solenoid valve B5 to connect with the vacuum pump.

[0041] Among them, four groups of spring rods B603 are fixedly arranged at the rear end of the movable mold body 6, and demolding parts B604 are slidably arranged on the outside of the four groups of spring rods B603; the spring rods B603 are all sleeved with springs and pass through the demolding parts B604 to set baffle limit installation; a push rod B605 is fixedly arranged in the middle of the front side of the demolding part B604, and the push rod B605 is consistent with the mold body surface of the movable mold body 6.

[0042] Among them, the main mold body 3 and the movable mold body 6 are both provided with circulating water circuits, and two groups of gooseneck pipe fittings 7 are arranged above the circulating water circuits of the main mold body 3 and the movable mold body 6 to connect with each other; the gooseneck pipe fittings 7 are kept bent upward by the flexural force in the installation state.

[0043] Among them, the right water inlet of the circulating water circuit of the main mold body 3 is connected with a water inlet pipe 8; the left water outlet of the circulating water circuit of the main mold body 3 is connected to the water inlet end of the conveyor 2 by four groups of pipes.

[0044] like Figure 1-9 As shown, the hydraulic oil in the oil tank 103 is input into the two combined mold hydraulic cylinders 102 through the hydraulic pump 104, the two combined mold hydraulic cylinders 102 are opened, and the movable mold body 6 and the main mold body 3 are molded together to form a closed cavity;

[0045] The electric cylinder 307 is extended to raise the motor seat 308, and the blocking mold rod 310 is moved to a position above the tilted injection pipe 304. The solenoid valve B5 is opened, and the air inside the cavity is extracted from the tilted injection pipe 304 by using a vacuum pump. After the extraction is completed, the solenoid valve B5 is closed, and the solenoid valve A4 is opened. The injection molding liquid is input into the tilted injection pipe 304 through the injection molding machine, and the injection molding liquid is quickly and quantitatively filled into the cavity through negative pressure. Then the solenoid valve A4 is closed, and the electric cylinder 307 is retracted to reset the blocking mold rod 310, while ensuring that the injection molding liquid enters the cavity;

[0046] During demoulding, the shrinking mold clamping hydraulic cylinder 102 will separate the main mold body 3 and the movable mold body 6. When the main mold body 3 and the movable mold body 6 are separated to the maximum position, the H-shaped frame 602 presses the demoulding piece A302 to move the push rod A303 backward, and the demoulding piece B604 contacts the U-shaped frame 1 and cannot move, so that the front end of the push rod B605 exceeds the movable mold body 6, and double-sided demoulding is performed, which makes it inconvenient for the lampshade to stick to the main mold body 3 or the outside of the movable mold body 6, and demoulding can be guaranteed.

[0047] Embodiment 2:

[0048] On the basis of Example 1, a water pump is used to inject water into the water inlet pipe 8, and the water quickly circulates through the inside of the main mold 3 and the movable mold 6 to cool down, thereby achieving heat dissipation and allowing the lampshade to quickly solidify and take shape; the formed lampshade will fall to the top of the conveyor belt 201; when the water circulates, it passes through the eccentric channel 202 and drives the impeller in the eccentric channel 202 to rotate, thereby driving the eccentric channel 202 to rotate and transporting the lampshade backward.

[0049] Embodiment 3:

[0050] On the basis of Example 1, during the shaping process, the driving motor 309 is started to drive the blocking mold rod 310 to rotate, so that the blocking mold rod 310 and the injection molding position of the lampshade can be separated and flash can be prevented from occurring during the shaping process.

[0051] Specific usage and function of this embodiment: In the present invention, when in use, the hydraulic oil in the oil tank 103 is input into the two combined mold hydraulic cylinders 102 through the hydraulic pump 104, the two combined mold hydraulic cylinders 102 are opened, and the movable mold body 6 and the main mold body 3 are molded to form a closed cavity;

[0052] The electric cylinder 307 is extended to raise the motor seat 308, and the blocking mold rod 310 is moved to a position above the tilted injection pipe 304. The solenoid valve B5 is opened, and the air inside the cavity is extracted from the tilted injection pipe 304 by using a vacuum pump. After the extraction is completed, the solenoid valve B5 is closed, and the solenoid valve A4 is opened. The injection molding liquid is input into the tilted injection pipe 304 through the injection molding machine, and the injection molding liquid is quickly and quantitatively filled into the cavity through negative pressure. Then the solenoid valve A4 is closed, and the electric cylinder 307 is retracted to reset the blocking mold rod 310, while ensuring that the injection molding liquid enters the cavity;

[0053] Then, a water pump is used to inject water into the water inlet pipe 8, and the water is rapidly circulated through the main mold body 3 and the movable mold body 6 to cool down, thereby achieving heat dissipation and allowing the lampshade to be quickly solidified and shaped;

[0054] The driving motor 309 is started to drive the blocking mold rod 310 to rotate, so as to separate the blocking mold rod 310 from the injection molding position of the lampshade and prevent flash from occurring during the molding process;

[0055] The shrinking mold clamping hydraulic cylinder 102 will separate the main mold body 3 and the movable mold body 6. When the main mold body 3 and the movable mold body 6 are separated to the maximum position, the H-shaped frame 602 presses the demoulding member A302 to move the push rod A303 backward, and the demoulding member B604 contacts the U-shaped frame 1 and cannot move, so that the front end of the push rod B605 exceeds the movable mold body 6, and double-sided demoulding is performed, which makes it inconvenient for the lampshade to be attached to the main mold body 3 or the outside of the movable mold body 6, and demoulding can be guaranteed;

[0056] The formed lampshade will fall to the top of the conveyor belt 201; when the water circulates, it passes through the eccentric channel 202 to drive the impeller in the eccentric channel 202 to rotate, and then drives the eccentric channel 202 to rotate, and transports the lampshade backward.

Claims

1. A mold for injection molding automobile lampshade, characterized in that: include: A U-shaped frame (1), wherein side support frames (101) are fixedly arranged on both sides of the bottom of the U-shaped frame (1); a conveyor (2) is fixedly arranged below the side support frames (101); a conveyor belt (201) is rotatably arranged in the middle of the conveyor (2) in cooperation with a rotating roller; an eccentric channel (202) is fixedly arranged on the left front side of the conveyor (2); an impeller is rotatably arranged in the middle of the eccentric channel (202) in cooperation with a sealed bearing, and the rotating shaft of the impeller is coaxially connected to the rotating roller on the front side of the conveyor belt (201); A main mold body (3) is fixedly arranged at the middle front end opening of the U-shaped frame (1); a tilting injection pipe (304) tilted to one side is integrally arranged on the top of the main mold body (3); an assembly seat (305) is integrally arranged on the outer end of the tilting injection pipe (304); an outer plane of the assembly seat (305) is parallel and aligned with a plane of one side of the internal mold cavity of the main mold body (3); a guide outer frame (306) is fixedly arranged on the top of the assembly seat (305); an electric cylinder (306) is fixedly arranged above the assembly seat (305). 07), a motor seat (308) is fixedly provided at the telescopic end of the electric cylinder (307), the motor seat (308) is H-shaped and fits and slides in the guide outer frame (306); a driving motor (309) is fixedly provided above the motor seat (308); a blocking mold rod (310) is provided in the tilting injection pipe (304), the driving motor (309) is transmission-connected to the blocking mold rod (310), and the bottom end of the blocking mold rod (310) can be aligned with the flat inclined surface of the internal mold cavity of the main mold body (3); the tilting The two sides of the injection pipe (304) are respectively connected to a solenoid valve A (4) and a solenoid valve B (5); a movable mold body (6) is fixedly provided with four sets of guide mold rods (601) at the front end of the movable mold body (6); an H-shaped frame (602) is fixedly provided at the corner where the guide mold rods (601) pass through the main mold body (3); the position of the solenoid valve A (4) is lower than the solenoid valve B (5); a pipeline is provided at the other end of the solenoid valve A (4) to connect to the injection molding machine; and a pipeline is provided at the other end of the solenoid valve B (5) to connect to the vacuum pump.

2. The mold for injection molding a car lampshade according to claim 1, characterized in that: Two combined mold hydraulic cylinders (102) are fixedly arranged on the rear side of the U-shaped frame (1), and the telescopic ends of the combined mold hydraulic cylinders (102) are fixedly connected to the two ends of the rear side of the movable mold body (6); the two ends of the rear side of the movable mold body (6) are arranged as stepped structures; an oil tank (103) is fixedly arranged at the rear right side of the U-shaped frame (1), and a breath adjustment hole is arranged on the top of the oil tank (103); the outlet end of the oil tank (103) is connected to a hydraulic pump (104), and a pipeline is arranged at the outlet end of the oil tank (103) to synchronously connect and control the two combined mold hydraulic cylinders (102).

3. The mold for injection molding automobile lampshade according to claim 1, characterized in that: Four groups of spring rods A (301) are fixedly arranged on the front side of the main mold body (3), and demoulding parts A (302) are slidably arranged outside the four groups of spring rods A (301); the spring rods A (301) are all sleeved with springs and then pass through the demoulding parts A (302) to set a blocking piece for position limiting installation; a push rod A (303) is fixedly arranged in the middle of the rear side of the demoulding parts A (302), and the push rod A (303) slides in the main mold body (3) and matches with the inner cavity of the main mold body (3).

4. The mold for injection molding automobile lampshade according to claim 1, characterized in that: Four groups of spring rods B (603) are fixedly arranged at the rear end of the movable mold body (6), and demoulding parts B (604) are slidably arranged outside the four groups of spring rods B (603); the spring rods B (603) are all sleeved with springs and then pass through the demoulding parts B (604) to set a blocking piece for position limiting installation; a push rod B (605) is fixedly arranged in the middle of the front side of the demoulding parts B (604), and the push rod B (605) is consistent with the mold body surface of the movable mold body (6).

5. The mold for injection molding automobile lampshade according to claim 1, characterized in that: The main mold body (3) and the movable mold body (6) are both provided with a circulating water circuit inside, and two groups of gooseneck pipe fittings (7) are provided above the circulating water circuits of the main mold body (3) and the movable mold body (6) to connect and communicate with each other; the gooseneck pipe fittings (7) are kept bent upward by the flexural force in the installed state.

6. The mold for injection molding a car lampshade as claimed in claim 5, characterized in that: A water inlet pipe (8) is connected to the water inlet on the right side of the circulating water circuit of the main mold body (3); and four groups of pipes are connected to the water inlet end of the conveyor (2) at the water outlet on the left side of the circulating water circuit of the main mold body (3).

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