CN114670404A - High-precision full-electric control injection platform, injection molding machine and injection extrusion process - Google Patents
High-precision full-electric control injection platform, injection molding machine and injection extrusion process Download PDFInfo
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- CN114670404A CN114670404A CN202210199012.6A CN202210199012A CN114670404A CN 114670404 A CN114670404 A CN 114670404A CN 202210199012 A CN202210199012 A CN 202210199012A CN 114670404 A CN114670404 A CN 114670404A
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- 238000002347 injection Methods 0.000 title claims abstract description 57
- 239000007924 injection Substances 0.000 title claims abstract description 57
- 238000001746 injection moulding Methods 0.000 title claims abstract description 56
- 238000001125 extrusion Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 139
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims description 26
- 238000009434 installation Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 229920003023 plastic Polymers 0.000 abstract description 6
- 239000004033 plastic Substances 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of injection molding equipment, and particularly relates to a high-precision full-electric control injection platform, an injection molding machine and an injection extrusion process, which comprise a base, a servo backpressure device and a screw pushing and feeding mechanism, wherein the servo backpressure device comprises an axial guide mechanism and a servo driving mechanism; the servo driving mechanism comprises a first driving motor and a screw rod pair, a screw rod of the screw rod pair is connected with the output end of the first driving motor, and a nut is fixedly connected with the screw rod pushing and feeding mechanism. Adopt servo structure drive screw to push feed mechanism and overcome fluidic reaction force, automatically controlled servo structure can accurate control screw push feed mechanism and overcome this thrust and remove and predetermine the stroke, realizes accurate pressurize, guarantees the material and penetrates the speed, is favorable to improving the injection effect, reduces the finished product's that moulds plastics shrinkage, improves product quality.
Description
Technical Field
The invention belongs to the technical field of coating equipment, and particularly relates to a high-precision full-electric control injection platform, an injection molding machine and an injection extrusion process.
Background
The basic working principle of the injection machine can be understood as that after plastic raw materials are uniformly plasticized in a charging barrel, injection, flowing mold filling, pressure maintaining and cooling are carried out to obtain an injection product, and the injection product is characterized in that: under the action of the screw, the granular plastic stored in the hopper continuously moves along the screw groove. Due to the combined action of the external heating of the charging barrel and the shearing of the screw rod, the plastic is continuously heated and softened and finally becomes a molten viscous flow state. Simultaneously, the screw is pushed back by the action force of the melt at the head of the screw. The back pressure (working oil back-leakage resistance) of the screw is changed to adjust the retraction speed of the screw, so that the plastic flowing condition in the screw groove is changed, and the purpose of controlling the plastic plasticizing performance is finally achieved.
The traditional injection machine generally comprises a forming end and an ejection end, wherein the ejection end is of a screw extrusion structure, the screw extrusion structure pushes a preset material to the forming end after spirally melting the material, the forming end is a corresponding mold, and a mold cavity feeding port of the mold is hermetically connected with the ejection end of the screw extrusion structure.
However, the screw rod of traditional screw extrusion structure is at the rotatory in-process that pushes away the material, receive the reaction force of material, lead to the screw rod to produce the trend that the material removed dorsad, therefore, including the control structure of control screw rod dorsad removal degree in traditional screw extrusion structure, the backpressure structure promptly, traditional backpressure structure is the backpressure valve, backpressure valve among the prior art uses the hydrovalve mostly to give first place to, the structure complexity of hydrovalve, the backpressure control precision is low, and hydraulic system's cost is higher, improve the cost of manufacture of whole injection structure easily, be unfavorable for enterprise's development.
Disclosure of Invention
The invention aims to provide a high-precision full-electronic-control injection platform, an injection molding machine and an injection extrusion process, and aims to solve the technical problems that a traditional backpressure valve in the prior art is mainly a hydraulic valve, the backpressure valve in the prior art is complex in structure, low in backpressure control accuracy and high in cost of a hydraulic system, the manufacturing cost of the whole injection structure is easily increased, and enterprise development is not facilitated.
In order to achieve the purpose, the high-precision full-electric control injection platform provided by the embodiment of the invention comprises a base, a servo back pressure device and a screw pushing and feeding mechanism, wherein the base is arranged at the feeding end of a mold of an injection molding machine; the servo back pressure device comprises an axial guide mechanism and a servo driving mechanism, the axial guide mechanism is connected to the base in a sliding mode, the axial guide mechanism can linearly approach to or get away from a mold of the injection molding machine along the upper end face of the base, and the servo driving mechanism is fixedly arranged on the axial guide mechanism; the screw pushing and feeding mechanism is connected to the guide end of the axial guide mechanism in a sliding manner, the output end of the screw pushing and feeding mechanism can extend into the mold feeding end of the injection molding machine, and the end, far away from the mold of the injection molding machine, of the screw pushing and feeding mechanism is connected with the output end of the servo driving mechanism; the servo driving mechanism comprises a first driving motor and a screw rod pair, the first driving motor is fixedly arranged on the axial guide mechanism, a screw rod of the screw rod pair is connected with the output end of the first driving motor, and a nut of the screw rod pair is fixedly connected with the screw rod pushing and feeding mechanism.
Optionally, the axial guiding mechanism includes a moving assembly and at least two sets of guide rods, the moving assembly is slidably connected to the base through a guide rail pair, a guide rail of the guide rail pair is arranged towards a mold of the injection molding machine, the moving assembly is arranged to accommodate an installation cavity of the screw pushing and feeding mechanism, the guide rods are fixedly arranged in the installation cavity, the screw pushing and feeding mechanism is slidably connected to the guide rods, and an output end of the screw pushing and feeding mechanism is slidably connected to an end portion of the moving assembly close to the mold of the injection molding machine.
Optionally, the moving assembly includes a first moving seat and a second moving seat, the first moving seat and the second moving seat are both fixedly connected to the sliding block of the guide rail pair, a gap structure is provided between the first moving seat and the second moving seat to form the installation cavity, two ends of the guide rod are respectively fixedly connected to the first moving seat and the second moving seat and are disposed in the gap structure, the driving source is fixedly disposed on the second moving seat, and the screw rod pushes the output end of the feeding mechanism and is slidably connected to the first moving seat.
Optionally, wear to be equipped with the inlet pipe on the first seat that removes, the inlet pipe sets up towards the mould feed end of injection molding machine, the circumference lateral wall of inlet pipe is provided with the feed inlet, be provided with the intercommunication on the first seat that removes the feed chute of feed inlet, the screw rod pushes away feed mechanism's output and extends to just can spiral propelling movement material toward the mould direction of injection molding machine removal in the feed inlet.
Optionally, the first moving seat is arranged in a square structure, the number of the guide rail pairs is two, the guide rails of the two guide rail pairs are laid on the base at intervals, and the bottom of the first moving seat is respectively connected with the two guide rails in a sliding manner through a sliding block; the number of the guide rods is four, the bottom of the second movable seat is respectively connected with the two guide rails in a sliding mode through a sliding block, all the guide rods are evenly distributed on the corner position of the first movable seat, a plurality of extension blocks are evenly arranged on the circumferential edge of the second movable seat in a protruding mode at intervals, and the extension blocks are respectively fixedly connected with the corresponding guide rods.
Optionally, the servo driving mechanism includes a fixed cylinder, a screw rod pair and a first driving motor, the fixed cylinder is fixedly arranged on the axial guiding mechanism, a screw rod of the screw rod pair is rotatably connected to the inner ring of the fixed cylinder, a gap is arranged between the screw rod of the screw rod pair and the circumferential inner wall of the fixed cylinder, a nut of the screw rod pair is fixedly connected with the end of the screw rod pushing and feeding mechanism, and the output end of the first driving motor is connected with the screw rod of the screw rod pair through a transmission unit in a driving manner, and the end of the nut is connected in a driving manner.
Optionally, the screw pushing and feeding mechanism comprises a mounting seat, a second driving motor, a rotating seat and a screw, the circumferential edge of the mounting seat is connected with the guide rod in a sliding way, the end part of the mounting seat close to the screw rod pair is provided with a abdicating cavity, a screw rod of the screw rod pair can extend into the yielding position cavity, a nut of the screw rod pair is fixedly arranged in the yielding position cavity and is in threaded connection with the screw rod of the screw rod pair, when the screw rod of the screw rod pair rotates, the nut can drive the mounting seat to move along the direction of the guide rod, the rotating seat is rotationally connected with the end part of the mounting seat far away from the abdicating cavity, one end of the screw is connected with the rotating seat in a key way, the other end of the screw rod extends to the moving assembly, and the output end of the second driving motor is in driving connection with the rotating seat through a transmission unit.
Optionally, a pressure sensing unit is further arranged in the mounting seat and used for feeding back current pressure parameters of the rotating seat in real time.
One or more technical schemes in the high-precision full-electric control shooting table provided by the embodiment of the invention at least have one of the following technical effects:
Preheating: the screw pushing and feeding mechanism operates to heat the output end of the screw pushing and feeding mechanism;
feeding: the material is conveyed to the output end of the screw pushing and feeding mechanism and then is melted into a fluid state;
back pressure buffering pushes away material: the servo back pressure device accurately drives the screw rod to push the reaction force of the feeding mechanism, which overcomes the fluid, to slowly move back to the mold of the injection molding machine through the linear structure of the screw rod, so that the material injection speed is ensured.
Compared with the traditional back pressure valve, the hydraulic valve is mainly used, the structure of the hydraulic valve is complex, the back pressure control accuracy is low, the cost of a hydraulic system is high, the manufacturing cost of the whole injection structure is easily increased, and the technical problem that the enterprise development is not facilitated is solved; the high-precision full-electric control injection platform provided by the embodiment of the invention adopts a servo structure to drive the screw pushing and feeding mechanism to overcome the counterforce of fluid through the electric unit, so that when the screw pushing and feeding mechanism is pushed by the counterforce of the fluid to generate a backward movement trend, the electric control servo structure can accurately control the screw pushing and feeding mechanism to overcome the pushing force to move a preset stroke, realize accurate pressure maintaining, ensure the injection speed of materials, be conductive to improving the injection effect, reduce the shrinkage rate of injection molding finished products and improve the product quality.
In order to achieve the purpose, the injection molding machine provided by the embodiment of the invention comprises the high-precision full-electric control injection platform.
One or more technical schemes in the injection molding machine provided by the embodiment of the invention at least have one of the following technical effects:
preheating: starting the screw pushing and feeding mechanism to heat and preheat the output end of the screw pushing and feeding mechanism;
feeding and melting: an operator pushes the feed inlet of the feeding mechanism to convey master batches to the screw, the master batches are melted into a fluid structure under the influence of high-temperature spiral stirring and move towards the direction of a mold of the injection molding machine, and meanwhile, the fluid generates reaction force on the screw, which is back to the mold;
back pressure buffering: the first driving motor is started to drive the screw rod of the screw rod pair connected to the fixed cylinder to rotate, so that the nut of the screw rod pair faces the length direction of the screw rod and is back to the direction of the reaction force in the step of melting and feeding, and the screw rod is provided with back pressure thrust for overcoming the reaction force by the pushing and feeding mechanism;
discharging: and the output end of the screw pushing and feeding mechanism supported by the nut back pressure of the screw pair injects the molten fluid to the molding end of the mold of the injection molding machine.
Compared with the traditional back pressure valve, the back pressure valve is mainly a hydraulic valve, the structure of the hydraulic valve is complex, the back pressure control accuracy is low, the cost of a hydraulic system is high, the manufacturing cost of the whole injection structure is easily increased, and the technical problem of being not beneficial to enterprise development is solved; the high-precision full-electric control injection platform provided by the embodiment of the invention adopts the servo structure to drive the screw pushing and feeding mechanism to overcome the counterforce of fluid through the electric unit, so that when the screw pushing and feeding mechanism is pushed by the counterforce of the fluid to generate a backward movement trend, the electric control servo structure can accurately control the screw pushing and feeding mechanism to overcome the thrust to move for a preset stroke, realize accurate pressure maintaining, ensure the injection speed of materials, be beneficial to improving the injection effect, reduce the shrinkage rate of injection molding finished products and improve the product quality.
In order to achieve the above object, an injection extrusion process provided by the embodiment of the present invention is performed by the above high-precision fully-electrically-controlled injection stage, and includes the following steps:
s100: starting a screw pushing and feeding mechanism to heat and preheat the output end of the screw pushing and feeding mechanism;
s200: an operator pushes the feed inlet of the feeding mechanism to convey master batches to the screw, the master batches are melted into a fluid structure under the influence of high-temperature spiral stirring and move towards the direction of a mold of the injection molding machine, and meanwhile, the fluid generates reaction force on the screw, which is back to the mold;
s300: the first driving motor is started to drive the screw rod of the screw rod pair connected to the fixed cylinder to rotate, so that the nut of the screw rod pair faces back to the direction of the reaction force in the step S200 in the length direction of the screw rod, and the screw rod is provided with back pressure thrust for overcoming the reaction force by the pushing and feeding mechanism;
s400: and the output end of the screw pushing and feeding mechanism supported by the nut back pressure of the screw pair injects the molten fluid to the molding end of the mold of the injection molding machine.
One or more technical schemes in the injection extrusion process provided by the embodiment of the invention at least have one of the following technical effects: compared with the traditional back pressure valve, the back pressure valve is mainly a hydraulic valve, the structure of the hydraulic valve is complex, the back pressure control accuracy is low, the cost of a hydraulic system is high, the manufacturing cost of the whole injection structure is easily increased, and the technical problem of being not beneficial to enterprise development is solved; the high-precision full-electric control injection platform provided by the embodiment of the invention adopts the servo structure to drive the screw pushing and feeding mechanism to overcome the counterforce of fluid through the electric unit, so that when the screw pushing and feeding mechanism is pushed by the counterforce of the fluid to generate a backward movement trend, the electric control servo structure can accurately control the screw pushing and feeding mechanism to overcome the thrust to move for a preset stroke, realize accurate pressure maintaining, ensure the injection speed of materials, be beneficial to improving the injection effect, reduce the shrinkage rate of injection molding finished products and improve the product quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a high-precision fully-electrically-controlled injection stage according to an embodiment of the present invention.
Fig. 2 is a schematic sectional view of a high-precision fully-electrically-controlled injection table provided in an embodiment of the present invention.
Fig. 3 is an enlarged view of a in fig. 2.
FIG. 4 is a schematic diagram illustrating the movement of the screw pushing and feeding mechanism when the screw pair shown in FIG. 2 is in operation.
Fig. 5 is a schematic structural diagram of a screw pushing feeding mechanism according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a servo driving mechanism according to an embodiment of the present invention.
Fig. 7 is a schematic flow chart of an injection extrusion process provided in an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-base 20-servo backpressure device 21-axial guide mechanism
30-screw rod pushing and feeding mechanism 22-servo driving mechanism 221-first driving motor
222-screw pair 211-moving component 212-guide rod
213-first movable base 214-second movable base 215-feed tube
223-fixed cylinder 224-first motor mounting frame 31-mounting seat
32-second drive motor 33-rotary seat 34-screw
35-abdication cavity 36-pressure sensing unit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-7 are exemplary and intended to be used to illustrate embodiments of the invention, and should not be construed as limiting the invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In one embodiment of the present invention, as shown in fig. 1, a high-precision full-electronic control injection platform is provided, which comprises a base 10, a servo back pressure device 20 and a screw pushing and feeding mechanism 30, wherein the base 10 is arranged at a mold feeding end of an injection molding machine; the servo back pressure device 20 comprises an axial guide mechanism 21 and a servo driving mechanism 22, the axial guide mechanism 21 is connected to the base 10 in a sliding manner, the axial guide mechanism 21 can linearly approach or depart from a mold of the injection molding machine along the upper end face of the base 10, and the servo driving mechanism 22 is fixedly arranged on the axial guide mechanism 21; the screw pushing and feeding mechanism 30 is slidably connected to the leading end of the axial guiding mechanism 21, the output end of the screw pushing and feeding mechanism 30 can extend into the feeding end of the mold of the injection molding machine, and the end part of the screw pushing and feeding mechanism 30 far away from the mold of the injection molding machine is connected with the output end of the servo driving mechanism 22; the servo driving mechanism 22 includes a first driving motor 221 and a screw pair 222, the first driving motor 221 is fixedly disposed on the axial guiding mechanism 21, a screw of the screw pair 222 is drivingly connected to the first driving motor 221, and a nut of the screw pair 222 is fixedly connected to the screw pushing and feeding mechanism 30.
Specifically, the working principle of the electric control shooting table is as follows:
preheating: the screw pushing and feeding mechanism 30 operates to raise the temperature of the output end;
feeding: the material is conveyed to the output end of the screw pushing and feeding mechanism 30 and then is melted into a fluid state;
back pressure buffering pushing: the servo back pressure device 20 precisely drives the screw to push the reaction force of the feeding mechanism 30 overcoming the fluid to slowly move back to the mold of the injection molding machine through a linear structure of the screw rod, and the material injection speed is guaranteed.
Compared with the traditional back pressure valve, the back pressure valve is mainly a hydraulic valve, the structure of the hydraulic valve is complex, the back pressure control accuracy is low, the cost of a hydraulic system is high, the manufacturing cost of the whole injection structure is easily increased, and the technical problem of being not beneficial to enterprise development is solved; the high-precision full-electric control injection platform provided by the embodiment of the invention adopts a servo structure to drive the screw pushing and feeding mechanism 30 to overcome the reactive force of fluid through the electric unit, so that when the screw pushing and feeding mechanism 30 is pushed by the reactive force of the fluid to generate a backward movement trend, the electric control servo structure can accurately control the screw pushing and feeding mechanism 30 to overcome the thrust to move a preset stroke, realize accurate pressure maintaining, ensure the material injection speed, be beneficial to improving the injection effect, reduce the shrinkage rate of injection molding finished products and improve the product quality.
As shown in fig. 2 to 4, in another embodiment of the present invention, the axial guiding mechanism 21 includes a moving component 211 and at least two sets of guiding rods 212, the moving component 211 is slidably connected to the base 10 through a pair of guiding rails, the guiding rails of the pair of guiding rails are disposed toward a mold of the injection molding machine, the moving component 211 is disposed with an installation cavity for accommodating the screw pushing and feeding mechanism 30, the guiding rods 212 are fixedly disposed in the installation cavity, the screw pushing and feeding mechanism 30 is slidably connected to the guiding rods 212, and an output end of the screw pushing and feeding mechanism 30 is slidably connected to an end of the moving component 211 close to the mold of the injection molding machine.
In this embodiment, this base 10 is fixed to be set up on the board of injection molding machine, and the injection molding machine is including being used for the drive to remove subassembly 211 along base 10 linear motion's sharp positioning mechanism, and simultaneously, the tip that servo drive mechanism 22 was kept away from to the board is provided with heating pipe and mount table, the heating pipe with the screw rod is pushed the output of feed mechanism 30 and is connected, the mount table with the heating pipe is kept away from the screw rod is pushed the output sliding connection of feed mechanism 30, the output of heating pipe runs through the mount table and is connected with the mould feed end of injection molding machine, and in this embodiment, this sharp positioning mechanism is sharp slip table.
As shown in fig. 2 to 4, in another embodiment of the present invention, the moving assembly 211 includes a first moving seat 213 and a second moving seat 214, the first moving seat 213 and the second moving seat 214 are both fixedly connected to the sliding block of the guide rail pair, a gap structure is disposed between the first moving seat 213 and the second moving seat 214 to form the installation cavity, two ends of the guide rod 212 are respectively fixedly connected to the first moving seat 213 and the second moving seat 214 and disposed in the gap structure, the driving source is fixedly disposed on the second moving seat 214, the output end of the screw pushing feeding mechanism 30 is slidably connected to the first moving seat 213, specifically, the output end of the linear positioning mechanism of the injection molding machine is fixedly connected to the second moving seat 214, when a mold change is required, the linear positioning mechanism drives the second moving seat 214 to drive the first moving seat 213 to move backwards, the output end of the heating pipe of the injection molding machine is far away from the mold closing end of the injection molding machine, and after the mold is installed, the linear positioning mechanism drives the heating pipe to reset.
As shown in fig. 2 to 4, in another embodiment of the present invention, a feeding pipe 215 is disposed on the first moving seat 213 in a penetrating manner, the feeding pipe 215 is disposed toward a feeding end of a mold of an injection molding machine, a feeding port is disposed on a circumferential side wall of the feeding pipe 215, a feeding groove communicated with the feeding port is disposed on the first moving seat 213, an output end of the screw pushing feeding mechanism 30 extends into the feeding pipe 215 and can spirally push a material to move toward the mold of the injection molding machine, specifically, the feeding groove is disposed in the first moving seat 213 from top to bottom, and the feeding port of the feeding pipe 215 is disposed upward and aligned with the feeding groove.
As shown in fig. 2 to 4, in another embodiment of the present invention, the first movable base 213 is arranged in a cube structure, the number of the guide rail pairs is two, the guide rails of the two guide rail pairs are laid on the base 10 at intervals, and the bottom of the first movable base 213 is slidably connected to the two guide rails through sliding blocks; the number of the guide rods 212 is four, the bottom of the second movable seat 214 is respectively slidably connected with the two sets of guide rails through a slider, all the guide rods 212 are uniformly distributed at the corner positions of the first movable seat 213, the circumferential edge of the second movable seat 214 is uniformly provided with a plurality of extension blocks 37 at intervals in a protruding manner, the extension blocks 37 are respectively and fixedly connected with the corresponding guide rods 212, specifically, the number of the extension blocks 37 is four, the four sets of the extension blocks 37 are uniformly distributed at the circumferential edge of the second movable seat 214 and aligned with the four corners of the first movable seat 213 of the square structure, the four sets of the extension blocks 37 are respectively and fixedly connected with the four sets of the guide rods 212 in a one-to-one correspondence manner, and a containing cavity for containing the screw pushing and feeding mechanism 30 is arranged in the second movable seat 214.
As shown in fig. 2 to 4, in another embodiment of the present invention, the servo driving mechanism 22 further includes a fixed cylinder 223, the fixed cylinder 223 is fixedly disposed on the axial guiding mechanism 21, a lead screw of the lead screw pair 222 is rotatably connected to an inner ring of the fixed cylinder 223, a gap is disposed between the lead screw of the lead screw pair 222 and a circumferential inner wall of the fixed cylinder 223, a nut of the lead screw pair 222 is fixedly connected to an end of the screw pushing and feeding mechanism 30, an output end of the first driving motor 221 is drivingly connected to an end of the lead screw pair 222, which is far from the nut, through a transmission unit, specifically, the fixed cylinder 223 is fixedly disposed on the second moving seat 214, an inner ring of the fixed cylinder 223 is aligned with the accommodating cavity, the lead screw of the lead screw pair 222 is disposed along a central axis of the inner ring of the fixed cylinder 223, and an outer side wall of the fixed cylinder 223 is provided with four sets of connecting blocks fixedly connected to the extending blocks 37.
As shown in fig. 6, in this embodiment, the upper end of the fixed cylinder 223 is provided with a first motor mounting bracket 224, the first motor mounting bracket 224 includes two sets of connecting plates and a first connecting seat, the two sets of connecting plates are respectively arranged on the outer side wall of the fixed cylinder 223, the first connecting seat is arranged between the two sets of first connecting plates and above the fixed cylinder 223, one side end wall of the first connecting seat is aligned with the end wall of the fixed cylinder 223, the first driving motor 221 is fixedly arranged on the first connecting seat, the output spindle of the first driving motor 221 extends to the outer side of the first connecting seat, the lead screw of the lead screw pair 222 extends to the outer side of the fixed cylinder 223, the first driving motor 221 is drivingly connected with the lead screw of the lead screw pair 222 through a synchronous wheel-synchronous belt transmission structure, the first driving motor 221 is a servo motor.
As shown in fig. 2 to 5, in another embodiment of the present invention, the screw pushing and feeding mechanism 30 includes an installation seat 31, a second driving motor 32, a rotation seat 33 and a screw 34, a circumferential edge of the installation seat 31 is slidably connected to the guide rod 212, an end of the installation seat 31 close to the screw pair 222 is provided with a yielding cavity 35, a screw of the screw pair 222 can extend into the yielding cavity 35, a nut of the screw pair 222 is fixedly disposed in the yielding cavity 35 and is in threaded connection with the screw of the screw pair 222, when the screw of the screw pair 222 rotates, the nut can drive the installation seat 31 to move along a direction of the guide rod 212, the rotation seat 33 is rotatably connected to an end of the installation seat 31 far from the yielding cavity 35, one end of the screw 34 is connected to the rotation seat 33, the other end of screw rod 34 extends to on the removal subassembly 211, the output of second driving motor 32 pass through the drive unit with roating seat 33 drive is connected, and is specific, the lead screw of the vice 222 of lead screw extends to the tip of die cavity 35 of stepping down is provided with spacing fender ring, spacing fender ring's external diameter is greater than the aperture of the connecting hole between die cavity 35 and the lead screw of stepping down, the cross-section of the vice 222 nut of lead screw is T type column structure setting, roating seat 33 pass through synchronizing wheel-synchronous belt drive unit with the output spindle drive of second driving motor 32 is connected.
In this embodiment, the second driving motor 32 is a servo motor, and the working principle of the screw pushing and feeding mechanism 30 is as follows: second driving motor 32 drive roating seat 33 is rotatory, and the screw rod 34 atress with roating seat 33 key-type connection is rotatory, and the screw rod 34 part that extends to in the feed chute stirs the material, and is specific, second driving motor 32 passes through the motor cabinet and fixes the setting on the lateral wall of second removes seat 214, second driving motor 32 with first removal seat 213's interval is little, and transmission distance is short, compares the long distance transmission in traditional screw rod 34 feeding structure and has higher transmission torsion, improves screw rod 34 feeding effect.
As shown in fig. 2 to 5, in another embodiment of the present invention, a pressure sensing unit 36 is further disposed in the mounting seat 31, the pressure sensing unit 36 is used for feeding back a current pressure parameter of the rotary seat 33 in real time, specifically, a digital control system in the injection molding machine is electrically connected to the pressure sensing unit 36, and after the digital control system receives the pressure parameter of the rotary seat 33 fed back by the pressure sensing unit 36, the first driving motor 221 is driven to rotate the lead screw of the lead screw pair 222 according to a pressure applied to the rotary seat 33 and a preset rotation speed, so that the nut generates a corresponding thrust to act on the rotary seat 33 to achieve a back pressure buffering effect.
Another embodiment of the invention provides an injection molding machine, which comprises the high-precision full-electric control injection platform.
As shown in fig. 7, another embodiment of the present invention provides an injection extrusion process using the above high-precision electronic control injection platform, comprising the following steps:
s100: starting the screw pushing and feeding mechanism 30 to heat and preheat the output end of the screw pushing and feeding mechanism;
s200: an operator conveys master batches to a feed port of the screw pushing and extruding feeding mechanism 30, the master batches are melted into a fluid structure under the influence of high-temperature spiral stirring and move towards the direction of a mold of the injection molding machine, and meanwhile, the fluid generates a reaction force back to the mold on the screw 34;
s300: the first driving motor 221 is started to drive the screw rod of the screw rod pair 222 connected to the fixed cylinder 223 to rotate, so that the nut of the screw rod pair 222 faces away from the direction of the reaction force in the step S200 in the length direction of the screw rod 34, and the screw rod pushing feeding mechanism 30 is provided with back pressure thrust force overcoming the reaction force;
s400: the output end of the screw pushing feed mechanism 30, which is supported by the nut back pressure of the screw pair 222, injects the molten fluid to the molding end of the mold of the injection molding machine.
Specifically, compared with the traditional back pressure valve which mostly takes a hydraulic valve as a main part, the hydraulic valve has a complex structure, low back pressure control accuracy and higher cost of a hydraulic system, the manufacturing cost of the whole injection structure is easily increased, and the technical problem of being not beneficial to enterprise development is solved; the high-precision full-electric control injection platform provided by the embodiment of the invention adopts a servo structure to drive the screw pushing and feeding mechanism 30 to overcome the reactive force of fluid through the electric unit, so that when the screw pushing and feeding mechanism 30 is pushed by the reactive force of the fluid to generate a backward movement trend, the electric control servo structure can accurately control the screw pushing and feeding mechanism 30 to overcome the thrust to move a preset stroke, realize accurate pressure maintaining, ensure the material injection speed, be beneficial to improving the injection effect, reduce the shrinkage rate of injection molding finished products and improve the product quality.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a platform is penetrated to full automatically controlled of high accuracy which characterized in that includes:
the base is arranged at the feed end of a mold of the injection molding machine;
the servo back pressure device comprises an axial guide mechanism and a servo driving mechanism, the axial guide mechanism is connected to the base in a sliding mode, the axial guide mechanism can be linearly close to or far away from a mold of the injection molding machine along the upper end face of the base, and the servo driving mechanism is fixedly arranged on the axial guide mechanism;
the screw pushing and feeding mechanism is connected to the guide end of the axial guide mechanism in a sliding mode, the output end of the screw pushing and feeding mechanism can extend into the feed end of a mold of the injection molding machine, and the end, far away from the mold of the injection molding machine, of the screw pushing and feeding mechanism is connected with the output end of the servo driving mechanism;
the servo driving mechanism comprises a first driving motor and a screw rod pair, the first driving motor is fixedly arranged on the axial guide mechanism, a screw rod of the screw rod pair is connected with the output end of the first driving motor, and a nut of the screw rod pair is fixedly connected with the screw rod pushing and feeding mechanism.
2. The high-precision full-electric control shooting table according to claim 1, characterized in that: the axial guiding mechanism comprises a moving assembly and at least two groups of guide rods, the moving assembly is connected to the base through a guide rail pair in a sliding mode, a guide rail of the guide rail pair is arranged towards a mold of the injection molding machine, the moving assembly is arranged and used for containing an installation cavity of the screw pushing feeding mechanism, the guide rods are fixedly arranged in the installation cavity, the screw pushing feeding mechanism is connected to the guide rods in a sliding mode, and the output end of the screw pushing feeding mechanism is connected with the end portion of the moving assembly, close to the mold of the injection molding machine, in a sliding mode.
3. The high-precision fully electrically controlled stage according to claim 2, wherein: the movable assembly comprises a first movable seat and a second movable seat, the first movable seat and the second movable seat are fixedly connected with a sliding block of the guide rail pair, a gap structure is arranged between the first movable seat and the second movable seat to form the installation cavity, two ends of the guide rod are respectively fixedly connected with the first movable seat and the second movable seat and are arranged in the gap structure, the driving source is fixedly arranged on the second movable seat, and the output end of the screw pushing feeding mechanism is connected with the first movable seat in a sliding mode.
4. A highly accurate fully electrically controlled stage according to claim 3 wherein: the inlet pipe is worn to be equipped with on the first seat that removes, the inlet pipe sets up towards the mould feed end of injection molding machine, the circumference lateral wall of inlet pipe is provided with the feed inlet, be provided with the intercommunication on the first seat that removes the feed chute of feed inlet, the screw rod pushes away feed mechanism's output and extends to just can spiral propelling movement material remove towards the mould direction of injection molding machine in the feed inlet.
5. A highly accurate fully electrically controlled stage according to claim 3 wherein: the first movable seat is arranged in a square structure, the number of the guide rail pairs is two, the guide rails of the two guide rail pairs are laid on the base at intervals, and the bottom of the first movable seat is respectively connected with the two guide rails in a sliding manner through a sliding block;
the quantity of guide bars is four groups, the bottom of second removal seat pass through the slider respectively with two sets of guide rail sliding connection, all the guide bar evenly distributed is in on the corner position of first removal seat, the circumference border of second removal seat is evenly the interval outstanding a plurality of extension pieces that are provided with, the extension piece respectively with correspond guide bar fixed connection.
6. The high-precision full-electric control injection platform according to claim 2, characterized in that: the servo driving mechanism comprises a fixed cylinder, a screw rod pair and a first driving motor, the fixed cylinder is fixedly arranged on the axial guide mechanism, a screw rod of the screw rod pair is connected to the inner circle of the fixed cylinder in a rotating mode, a gap is formed between the screw rod of the screw rod pair and the circumferential inner wall of the fixed cylinder, a nut of the screw rod pair is fixedly connected with the end portion of the screw rod pushing and feeding mechanism, and the output end of the first driving motor is connected with the screw rod of the screw rod pair through a transmission unit in a keeping away mode.
7. The high-precision full-electric control injection platform according to claim 6, characterized in that: the screw pushing and feeding mechanism comprises a mounting seat, a second driving motor, a rotating seat and a screw, the circumferential edge of the mounting seat is connected with the guide rod in a sliding manner, the end part of the mounting seat close to the screw rod pair is provided with a yielding cavity, a screw rod of the screw rod pair can extend into the yielding cavity, the nut of the screw rod pair is fixedly arranged in the yielding cavity and is in threaded connection with the screw rod of the screw rod pair, when the screw rod of the screw rod pair rotates, the nut can drive the mounting seat to move along the direction of the guide rod, the rotating seat is rotationally connected with the end part of the mounting seat far away from the abdicating cavity, one end of the screw rod is connected with the rotating seat through a key, the other end of the screw rod extends to the moving assembly, and the output end of the second driving motor is in driving connection with the rotating seat through a transmission unit.
8. The high-precision full-electric control injection platform according to claim 7, characterized in that: and a pressure sensing unit is also arranged in the mounting seat and used for feeding back the current pressure parameters of the rotating seat in real time.
9. An injection molding machine, which is characterized in that: the high-precision fully electrically controlled shooting table comprises the high-precision fully electrically controlled shooting table as claimed in any one of claims 1 to 8.
10. An injection extrusion process, characterized by: the high-precision full-electric control injection platform is implemented by any one of claims 6 to 8, and comprises the following steps:
s100: starting the screw pushing and feeding mechanism to heat and preheat the output end of the screw pushing and feeding mechanism;
s200: an operator pushes the feed inlet of the feeding mechanism to convey master batches to the screw, the master batches are melted into a fluid structure under the influence of high-temperature spiral stirring and move towards the direction of a mold of the injection molding machine, and meanwhile, the fluid generates reaction force on the screw, which is back to the mold;
s300: the first driving motor is started to drive the screw rod of the screw rod pair connected to the fixed cylinder to rotate, so that the nut of the screw rod pair faces back to the direction of the reaction force in the step S200 in the length direction of the screw rod, and the screw rod is provided with back pressure thrust for overcoming the reaction force by the pushing and feeding mechanism;
s400: and the output end of the screw pushing and feeding mechanism, which is supported by the back pressure of the nut of the screw pair, injects the molten fluid to the molding end of the mold of the injection molding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210199012.6A CN114670404A (en) | 2022-03-02 | 2022-03-02 | High-precision full-electric control injection platform, injection molding machine and injection extrusion process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210199012.6A CN114670404A (en) | 2022-03-02 | 2022-03-02 | High-precision full-electric control injection platform, injection molding machine and injection extrusion process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6309203B1 (en) * | 1997-11-13 | 2001-10-30 | Toshiba Kikai Kabushiki Kaisha | Injection apparatus for injection molding machine |
| CN2502882Y (en) * | 2001-09-26 | 2002-07-31 | 宁波高新协力机电液有限公司 | Injection control device of injection machine |
| CN108099139A (en) * | 2018-01-02 | 2018-06-01 | 广东伟达智能装备股份有限公司 | A kind of injection molding machine hybrid electric plasticizing injecting device |
| CN213006233U (en) * | 2020-07-10 | 2021-04-20 | 东莞市力创机械有限公司 | Multi-stage driving injection mechanism and injection molding machine |
| CN214491318U (en) * | 2021-01-15 | 2021-10-26 | 重庆德洋中车汽车零部件有限公司 | Rotary injection molding machine |
-
2022
- 2022-03-02 CN CN202210199012.6A patent/CN114670404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6309203B1 (en) * | 1997-11-13 | 2001-10-30 | Toshiba Kikai Kabushiki Kaisha | Injection apparatus for injection molding machine |
| CN2502882Y (en) * | 2001-09-26 | 2002-07-31 | 宁波高新协力机电液有限公司 | Injection control device of injection machine |
| CN108099139A (en) * | 2018-01-02 | 2018-06-01 | 广东伟达智能装备股份有限公司 | A kind of injection molding machine hybrid electric plasticizing injecting device |
| CN213006233U (en) * | 2020-07-10 | 2021-04-20 | 东莞市力创机械有限公司 | Multi-stage driving injection mechanism and injection molding machine |
| CN214491318U (en) * | 2021-01-15 | 2021-10-26 | 重庆德洋中车汽车零部件有限公司 | Rotary injection molding machine |
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