CN212242007U - Injection system and full-hydraulic injection molding machine - Google Patents
Injection system and full-hydraulic injection molding machine Download PDFInfo
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- CN212242007U CN212242007U CN202021773167.9U CN202021773167U CN212242007U CN 212242007 U CN212242007 U CN 212242007U CN 202021773167 U CN202021773167 U CN 202021773167U CN 212242007 U CN212242007 U CN 212242007U
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Abstract
The utility model discloses an injection system and a full hydraulic injection molding machine, which comprises an oil supply unit, a first control unit, a second control unit, a pressurizing unit, a mold locking unit and a glue injection unit; the oil supply unit comprises an oil tank, a main pump and an auxiliary pump; the input end of the main pump is communicated with the oil tank, the output end of the main pump is communicated with the input end of the glue injection unit, and the output end of the glue injection unit is communicated with the oil tank; the first control unit is arranged on a pipeline between the output end of the main pump and the glue injection unit; the input end of the pressurizing unit is arranged on a pipeline between the first control unit and the glue injection unit; the output end of the pressurizing unit is communicated with the input end of the mode locking unit, and the output end of the mode locking unit is communicated with the oil tank; the application aims at providing an injection system and a full-hydraulic injection molding machine, which can keep injection pressure, reduce the internal stress of products and improve the production quality.
Description
Technical Field
The utility model relates to an injection molding machine technical field especially relates to an annotate pressure system and full-hydraulic injection molding machine.
Background
The common injection molding machine firstly locks the mold and then injects the melted plastic into the mold cavity, and the molding process comprises the following steps: and (3) closing the mold, locking, injecting, maintaining pressure, plasticizing, unloading, opening the mold and ejecting. The internal stress of the produced product is usually large, and the requirements of low-stress and high-precision products cannot be met.
The injection molding technology, i.e. the technology of compression molding after injection molding, is a combined molding technology of injection molding and compression molding, and is also called secondary mold closing injection molding. The injection molding and compression stages are carried out, the melt is pushed by the screw to be injected into the mold cavity, and then the melt injected into the mold cavity is compressed, so that the compression is very important, the residual stress in the plastic part is reduced, and the molded plastic part has high precision.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an annotate pressure system and full-hydraulic injection molding machine can keep injection pressure, reduces the internal stress of product, improves and produces the quality.
To achieve the purpose, the utility model adopts the following technical proposal: an injection system comprises an oil supply unit, a first control unit, a second control unit, a pressurizing unit, a mold locking unit and a glue injection unit; the oil supply unit comprises an oil tank, a main pump and an auxiliary pump; the input end of the main pump is communicated with the oil tank, the output end of the main pump is communicated with the input end of the glue injection unit, and the output end of the glue injection unit is communicated with the oil tank; the first control unit is arranged on a pipeline between the output end of the main pump and the glue injection unit; the input end of the pressurizing unit is arranged on a pipeline between the first control unit and the glue injection unit; the output end of the pressurizing unit is communicated with the input end of the mode locking unit, and the output end of the mode locking unit is communicated with the oil tank; the auxiliary pump is electrically connected with the main pump, the output end of the auxiliary pump is communicated with the input end of the pressurizing unit, and the second control unit is arranged on a pipeline between the output end of the auxiliary pump and the oil tank.
Preferably, the first control unit is a PQ control valve, a flow control end of the PQ control valve is connected to a pipeline between the output end of the main pump and the glue injection unit, and a pressure control end of the PQ control valve is connected to a pipeline between the output end of the main pump and the oil tank.
Preferably, the second control unit is an electromagnetic overflow valve, and the electromagnetic overflow valve is arranged on a pipeline between the output end of the auxiliary pump and the oil tank.
Preferably, the glue injection unit comprises a glue injection oil cylinder and a glue injection valve, an oil port P of the glue injection valve is communicated with the output end of the main pump, an oil port T of the glue injection valve is communicated with the oil tank, and an oil port A and an oil port B of the glue injection valve are respectively communicated with the glue injection oil cylinder.
Preferably, the injection molding device further comprises an injection molding switching valve and a fourth one-way valve, an input end of the injection molding switching valve is communicated with a pipeline between the first control unit and the glue injection unit, the fourth one-way valve is arranged at an output end of the auxiliary pump, and an output end of the injection molding switching valve is communicated with a pipeline between the fourth one-way valve and the pressurizing unit.
Preferably, the pressurization unit comprises a sixth one-way valve, a seventh one-way valve, a pressurization valve and a pressurization oil cylinder; the input end of the sixth one-way valve is communicated with the output end of the main pump, the output end of the sixth one-way valve is communicated with the control end of the booster valve, the input end of the seventh one-way valve is communicated with the output end of the main pump, the output end of the seventh one-way valve is communicated with the input end of the booster oil cylinder, one output end of the booster oil cylinder is communicated with the input end of the booster valve, and the output end of the booster valve is communicated with the oil tank; and the other output end of the pressurizing oil cylinder is communicated with the mold locking unit.
Preferably, the mold locking unit comprises a mold locking valve, a pressure sensor and a mold locking oil cylinder; the other output end of the pressurizing oil cylinder is communicated with an oil port P of the mode locking valve, an oil port T of the mode locking valve is communicated with the oil tank, an oil port A and an oil port B of the mode locking valve are respectively communicated with the mode locking oil cylinder, and the pressure sensor is connected with a pipeline between the mode locking valve and the mode locking oil cylinder.
A full-hydraulic injection molding machine comprises a support, a movable mold plate and a fixed mold plate, wherein a plurality of piston rods are erected between the support and the fixed mold plate, the piston rods are sleeved with pistons, a cylinder body is sleeved on the periphery of each piston rod, one end of each cylinder body is connected with the movable mold plate, and the other end of each cylinder body is movably and hermetically connected with the corresponding piston rod; the cylinder body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively positioned at two sides of the piston; and a mould moving mechanism is arranged between the movable mould plate and the bracket.
Preferably, the cylinder further comprises a rear pressure plate, a rear guide sleeve and a rear end cover, wherein the rear guide sleeve is movably sleeved on the piston rod, the rear end cover is sleeved on the periphery of the rear guide sleeve, the rear pressure plate is movably sleeved on the periphery of the piston rod, one end of the rear end cover is connected with the rear pressure plate, and the other end of the rear end cover is connected with the cylinder body; the oil inlet is arranged on the rear end cover.
Preferably, the movable mould plate is provided with a mounting groove, the front guide sleeve is arranged in the mounting groove, the inner wall of the front guide sleeve is movably connected with the piston rod, one end of the front end cover is connected with the cylinder body, the other end of the front end cover is connected with the mounting groove, the gasket is clamped between the front end cover and the front guide sleeve, and the cartridge valve is arranged between the inner wall of the front end cover and the outer wall of the piston rod; the oil outlet is arranged on the front end cover.
This application adopts above-mentioned structure, adjust the pressure or the flow of pipeline through first the control unit and second the control unit, realize the compound die, low pressure locking, the injection, the moulding-die, the pressurize, the plastify, the die sinking, ejecting process, when the injection pressurize finishes, the die locking power drops to original 30%, reduces to zero step by step before the die sinking, reduces the internal stress of injection molding product effectively, produces the vibration when having avoided the die sinking, has guaranteed the smooth finish of injection molding product.
Drawings
The accompanying drawings are provided to further illustrate the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.
FIG. 1 is a schematic view of the injection system of the present invention;
fig. 2 is a schematic structural diagram of the injection molding machine of the present invention.
Wherein: the system comprises an oil supply unit 1, an oil tank 1a, a main pump 1b, an auxiliary pump 1c, a first control unit 2, a second control unit 3, a pressurizing unit 4, a sixth one-way valve 4a, a seventh one-way valve 4b, a pressurizing valve 4c, a pressurizing oil cylinder 4d, a mold locking unit 5, a mold locking valve 5a, a pressure sensor 5b, a mold locking oil cylinder 5c, a glue injection unit 6, a glue injection oil cylinder 6a, a glue injection valve 6b, a pressure injection switching valve 7, a fourth one-way valve 8, a support 9, a movable mold plate 10, a fixed mold plate 11, a piston rod 12, a piston 13, a cylinder body 14, an oil inlet 14a, an oil outlet 14b, a mold moving mechanism 15, a rear pressure plate 16, a rear guide sleeve 17, a rear end cover 18, a front end cover 19, a cartridge valve 20.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 and 2, an injection system of the present embodiment includes an oil supply unit 1, a first control unit 2, a second control unit 3, a pressurization unit 4, a mold locking unit 5, and a glue injection unit 6.
The fuel supply unit 1 includes a fuel tank 1a, a main pump 1b, and a sub-pump 1 c.
The input end of the main pump 1b is communicated with the oil tank 1a, the output end of the main pump 1b is communicated with the input end of the glue injection unit 6, and the output end of the glue injection unit 6 is communicated with the oil tank 1 a;
the first control unit 2 is disposed in a pipeline between an output end of the main pump 1b and the glue injection unit 6.
The input end of the pressurizing unit 4 is arranged on a pipeline between the first control unit 2 and the glue injection unit 6.
The output end of the pressurizing unit 4 is communicated with the input end of the mode locking unit 5, and the output end of the mode locking unit 5 is communicated with the oil tank 1 a.
The auxiliary pump 1c is electrically connected with the main pump 1b, the output end of the auxiliary pump 1c is communicated with the input end of the pressurizing unit 4, and the second control unit 3 is arranged on a pipeline between the output end of the auxiliary pump 1c and the oil tank 1 a.
The oil supply unit 1 further comprises a motor, the motor drives the main pump 1b and the auxiliary pump 1c to work, the pressure and the flow of the main pump 1b are regulated through the first control unit 2, control over all actions of the whole machine is achieved, and the auxiliary pump 1c regulates the pressure through the second control unit 3. The oil pressure of the hydraulic oil is improved through the pressurizing unit 4, the hydraulic oil enters the mold locking unit 5, the mold locking unit 5 reaches a preset pressure value a, the mold locking action is completed, and the mold is tightly attached. During moulding-die, the auxiliary pump 1c outputs high-pressure oil and enters the mould locking unit 5, the mould locking unit 5 reaches a preset pressure value b, the main pump 1b stops supplying oil to the mould locking unit 5, and meanwhile, the main pump can continue to supply power for the glue injection unit 6 to supplement materials, so that the injection moulding and compression moulding are realized.
By adopting the structure, the pressure or flow of the pipeline is adjusted through the first control unit 2 and the second control unit 3, the processes of die assembly, low-pressure locking, injection, die pressing, pressure maintaining, plasticizing, die opening and ejection are completed, when the injection and pressure maintaining are completed, the die locking force is reduced to 30 percent of the original die locking force, the die locking force is gradually reduced to zero before the die opening, the internal stress of the injection molding product is effectively reduced, the vibration generated during the die opening is avoided, and the smoothness of the injection molding product is ensured.
Preferably, the first control unit 2 is a PQ control valve, a flow rate control end of the PQ control valve is connected to a pipeline between the output end of the main pump 1b and the glue injection unit 6, and a pressure control end of the PQ control valve is connected to a pipeline between the output end of the main pump 1b and the oil tank 1 a.
The PQ control valve is indicated by a symbol V1 in the drawing, and has a pressure-flow rate complex control function in which a flow valve function is lowered when the pressure is controlled and a pressure valve function is lowered when the flow rate is controlled. The PQ control valve regulates the operation of the entire system by regulating the pressure and flow rate of the output line and circuit of the main pump 1 b.
Preferably, the second control unit 3 is an electromagnetic overflow valve, and the electromagnetic overflow valve is arranged on a pipeline between the output end of the auxiliary pump 1c and the oil tank 1 a.
The electromagnetic overflow valve is marked by a V2 symbol in the figure, the pressure control end of the electromagnetic overflow valve is communicated with the oil inlet of the valve body, and the oil outlet of the valve body is communicated with the oil tank 1 a. When in die pressing, the electromagnetic overflow valve is electrified, and the auxiliary pump 1c outputs high-pressure oil to enter the die locking unit 5 to reach a die pressing set value. With this configuration, the pressure in the output line of the sub-pump 1c can be adjusted by the second control unit 3, and the control is simple.
Preferably, the glue injection unit 6 comprises a glue injection oil cylinder 6a and a glue injection valve 6B, an oil port P of the glue injection valve 6B is communicated with an output end of the main pump 1B, an oil port T of the glue injection valve 6B is communicated with the oil tank 1a, and an oil port a and an oil port B of the glue injection valve 6B are respectively communicated with the glue injection oil cylinder 6 a.
The glue injection valve 6b is marked by a V5 symbol in the figure, and by adopting the structure, the glue injection valve 6b and the glue injection oil cylinder 6a are matched to perform glue injection action.
Preferably, the injection molding machine further comprises an injection molding switching valve 7 and a fourth one-way valve 8, an input end of the injection molding switching valve 7 is communicated with a pipeline between the first control unit 2 and the glue injection unit 6, the fourth one-way valve 8 is arranged at an output end of the auxiliary pump 1c, and an output end of the injection molding switching valve 7 is communicated with a pipeline between the fourth one-way valve 8 and the pressurizing unit 4.
The fourth check valve 8 is indicated by the symbol V4 in the drawing, and the sub-pump 1c, the injection switching valve 7 and the fourth check valve 8 cooperate to complete the compression molding process.
Preferably, the pressurizing unit 4 includes a sixth check valve 4a, a seventh check valve 4b, a pressurizing valve 4c, and a pressurizing cylinder 4 d.
The input end of the sixth one-way valve 4a is communicated with the output end of the main pump 1b, the output end of the sixth one-way valve 4a is communicated with the control end of the booster valve 4c, the input end of the seventh one-way valve 4b is communicated with the output end of the main pump 1b, the output end of the seventh one-way valve 4b is communicated with the input end of the booster cylinder 4d, one output end of the booster cylinder 4d is communicated with the input end of the booster valve 4c, and the output end of the booster valve 4c is communicated with the oil tank 1 a.
And the other output end of the pressurizing oil cylinder 4d is communicated with the mold locking unit 5.
The sixth check valve 4a is symbolized by V6 and the seventh check valve 4b is symbolized by V7. The hydraulic oil output by the auxiliary pump 1c passes through the fourth one-way valve 8 and is conveyed to the sixth one-way valve 4a and the seventh one-way valve 4b through pipelines, the booster valve 4c is electrified, the hydraulic oil enters the booster oil cylinder 4d, the booster oil cylinder 4d outputs the hydraulic oil with increased pressure, the hydraulic oil passes through the mold locking valve 5a and then enters the mold locking oil cylinder 5c until the pressure reaches a preset pressure value, and therefore secondary mold pressing operation is completed. This action can be repeated many times depending on the operating conditions and the requirements of the product.
Preferably, the mold locking unit 5 comprises a mold locking valve 5a, a pressure sensor 5b and a mold locking oil cylinder 5 c; the other output end of the pressurizing oil cylinder 4d is communicated with an oil port P of the mold locking valve 5a, an oil port T of the mold locking valve 5a is communicated with the oil tank 1a, an oil port A and an oil port B of the mold locking valve 5a are respectively communicated with the mold locking oil cylinder 5c, and the pressure sensor 5B is connected to a pipeline between the mold locking valve 5a and the mold locking oil cylinder 5 c.
By adopting the structure, the mold locking valve 5a and the pressure sensor 5b are matched to adjust the oil inlet or the oil outlet of the mold locking oil cylinder 5c, so that the mold locking oil cylinder 5c is controlled to push or move back, and the mold locking action is completed.
A full-hydraulic injection molding machine comprises a support 9, a movable mold plate 10 and a fixed mold plate 11, wherein a plurality of piston rods 12 are erected between the support 9 and the fixed mold plate 11, a piston 13 is sleeved on each piston rod 12, a cylinder 14 is sleeved on the periphery of each piston rod 12, one end of each cylinder 14 is connected with the movable mold plate 10, and the other end of each cylinder 14 is movably and hermetically connected with the corresponding piston rod 12.
The cylinder 14 is provided with an oil inlet 14a and an oil outlet 14b, and the oil inlet 14a and the oil outlet 14b are respectively located on two sides of the piston 13.
And a mould moving mechanism 15 is arranged between the movable mould plate 10 and the bracket 9.
The mold moving mechanisms 15 adopt mold moving oil cylinders, preferably two in number, and are used for driving the movable mold plate 10 to move so as to perform mold opening and closing actions. The piston rod 12 is preferably provided with four.
By adopting the structure, the piston rod 12 is fixed through the matching of the support 9 and the fixed die plate 11, the piston rod 12, the piston 13 and the cylinder body 14 are matched, high-pressure oil enters the cylinder body 14, the high-pressure die locking action can be completed, in the die locking process, the pressure in the cylinder body 14 is subjected to feedback adjustment through the pressure sensor 5b, the die locking force can be accurately set through computer equipment, the signal of the pressure sensor 5b can be directly transmitted to the computer equipment, the influence of factors such as environment temperature and the like can not be caused, and the repetition precision is high.
Preferably, the piston rod mechanism further comprises a rear pressure plate 16, a rear guide sleeve 17 and a rear end cover 18, wherein the rear guide sleeve 17 is movably sleeved on the piston rod 12, the rear end cover 18 is sleeved on the periphery of the rear guide sleeve 17, the rear pressure plate 16 is movably sleeved on the periphery of the piston rod 12, one end of the rear end cover 18 is connected with the rear pressure plate 16, and the other end of the rear end cover 18 is connected with the cylinder body 14.
The oil inlet 14a is provided in the rear end cap 18.
With this configuration, it is possible to ensure that the movable seal is maintained between the rear end of the cylinder 14 and the piston rod 12.
Preferably, the movable mould plate further comprises a front end cover 19, a cartridge valve 20, a gasket and a front guide sleeve 21, the movable mould plate 10 is provided with a mounting groove, the front guide sleeve 21 is arranged in the mounting groove, the inner wall of the front guide sleeve 21 is movably connected with the piston rod 12, one end of the front end cover 19 is connected with the cylinder body 14, the other end of the front end cover 19 is connected with the mounting groove, the gasket is clamped between the front end cover 19 and the front guide sleeve 21, and the cartridge valve 20 is arranged between the inner wall of the front end cover 19 and the outer wall of the piston rod 12.
The oil outlet 14b is provided in the front end cover 19.
With this configuration, it is possible to ensure that the movable seal is maintained between the front end of the cylinder 14 and the piston rod 12.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. An injection system is characterized by comprising an oil supply unit, a first control unit, a second control unit, a pressurizing unit, a mold locking unit and a glue injection unit;
the oil supply unit comprises an oil tank, a main pump and an auxiliary pump;
the input end of the main pump is communicated with the oil tank, the output end of the main pump is communicated with the input end of the glue injection unit, and the output end of the glue injection unit is communicated with the oil tank;
the first control unit is arranged on a pipeline between the output end of the main pump and the glue injection unit;
the input end of the pressurizing unit is arranged on a pipeline between the first control unit and the glue injection unit;
the output end of the pressurizing unit is communicated with the input end of the mode locking unit, and the output end of the mode locking unit is communicated with the oil tank;
the auxiliary pump is electrically connected with the main pump, the output end of the auxiliary pump is communicated with the input end of the pressurizing unit, and the second control unit is arranged on a pipeline between the output end of the auxiliary pump and the oil tank.
2. The injection-pressure system according to claim 1, wherein the first control unit is a PQ control valve, a flow control end of the PQ control valve is connected to a pipeline between the output end of the main pump and the glue injection unit, and a pressure control end of the PQ control valve is connected to a pipeline between the output end of the main pump and the oil tank.
3. The system according to claim 1, wherein the second control unit is an electromagnetic spill valve provided in a line between the output of the secondary pump and the tank.
4. The injection system of claim 1, wherein the glue injection unit comprises a glue injection cylinder and a glue injection valve, an oil port P of the glue injection valve is communicated with the output end of the main pump, an oil port T of the glue injection valve is communicated with the oil tank, and an oil port a and an oil port B of the glue injection valve are respectively communicated with the glue injection cylinder.
5. The injection system of claim 1, further comprising an injection switching valve and a fourth one-way valve, wherein an input end of the injection switching valve is communicated with a pipeline between the first control unit and the glue injection unit, the fourth one-way valve is arranged at an output end of the auxiliary pump, and an output end of the injection switching valve is communicated with a pipeline between the fourth one-way valve and the pressurization unit.
6. The injection-compression system according to claim 1, wherein the pressurizing unit includes a sixth check valve, a seventh check valve, a pressurizing valve, and a pressurizing cylinder;
the input end of the sixth one-way valve is communicated with the output end of the main pump, the output end of the sixth one-way valve is communicated with the control end of the booster valve, the input end of the seventh one-way valve is communicated with the output end of the main pump, the output end of the seventh one-way valve is communicated with the input end of the booster oil cylinder, one output end of the booster oil cylinder is communicated with the input end of the booster valve, and the output end of the booster valve is communicated with the oil tank;
and the other output end of the pressurizing oil cylinder is communicated with the mold locking unit.
7. The injection-molding system according to claim 6, wherein said mold-locking unit comprises a mold-locking valve, a pressure sensor and a mold-locking cylinder; the other output end of the pressurizing oil cylinder is communicated with an oil port P of the mode locking valve, an oil port T of the mode locking valve is communicated with the oil tank, an oil port A and an oil port B of the mode locking valve are respectively communicated with the mode locking oil cylinder, and the pressure sensor is connected with a pipeline between the mode locking valve and the mode locking oil cylinder.
8. A full hydraulic injection molding machine comprises a support, a movable mold plate and a fixed mold plate, and is characterized in that a plurality of piston rods are arranged between the support and the fixed mold plate in an erecting mode, a piston is sleeved on each piston rod, a cylinder body is sleeved on the periphery of each piston rod, one end of each cylinder body is connected with the movable mold plate, and the other end of each cylinder body is movably and hermetically connected with the piston rod;
the cylinder body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively positioned at two sides of the piston;
and a mould moving mechanism is arranged between the movable mould plate and the bracket.
9. The full hydraulic injection molding machine according to claim 8, further comprising a rear platen, a rear guide sleeve and a rear end cap, wherein the rear guide sleeve is movably sleeved on the piston rod, the rear end cap is sleeved on the periphery of the rear guide sleeve, the rear platen is movably sleeved on the periphery of the piston rod, one end of the rear end cap is connected with the rear platen, and the other end of the rear end cap is connected with the cylinder body;
the oil inlet is arranged on the rear end cover.
10. The full hydraulic injection molding machine according to claim 8, further comprising a front end cap, a cartridge valve, a washer and a front guide sleeve, wherein the movable mold plate is provided with a mounting groove, the front guide sleeve is disposed in the mounting groove, an inner wall of the front guide sleeve is movably connected with the piston rod, one end of the front end cap is connected with the cylinder body, the other end of the front end cap is connected with the mounting groove, the washer is clamped between the front end cap and the front guide sleeve, and the cartridge valve is disposed between the inner wall of the front end cap and an outer wall of the piston rod;
the oil outlet is arranged on the front end cover.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021773167.9U CN212242007U (en) | 2020-08-21 | 2020-08-21 | Injection system and full-hydraulic injection molding machine |
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| CN202021773167.9U CN212242007U (en) | 2020-08-21 | 2020-08-21 | Injection system and full-hydraulic injection molding machine |
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