CN113290775B - Plasticizing injection molding device of exhaust type injection molding machine - Google Patents
Plasticizing injection molding device of exhaust type injection molding machine Download PDFInfo
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- CN113290775B CN113290775B CN202110636231.1A CN202110636231A CN113290775B CN 113290775 B CN113290775 B CN 113290775B CN 202110636231 A CN202110636231 A CN 202110636231A CN 113290775 B CN113290775 B CN 113290775B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 60
- 238000002347 injection Methods 0.000 claims abstract description 102
- 239000007924 injection Substances 0.000 claims abstract description 102
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 abstract description 19
- 238000003860 storage Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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
- B29C45/03—Injection moulding apparatus
-
- 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
- B29C45/1761—Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames
-
- 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
- B29C45/50—Axially movable screw
-
- 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
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
-
- 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
- B29C45/60—Screws
-
- 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
- B29C45/63—Venting or degassing means
-
- 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
- B29C45/50—Axially movable screw
- B29C2045/5004—Axially movable screw the forward screw end provided with an injection ram
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a plasticizing injection molding device of an exhaust type injection molding machine, which mainly comprises injection molding seat moving oil cylinders, guide rails, machine barrel screw overall moving oil cylinders, machine barrel screw supporting seats, sealing assemblies, thrust bearing groups, screws, machine barrels, plasticizing driving systems, hoppers, heating rings, an exhaust system, injection sleeves, supporting structures, nozzles and other parts. The cylinder is provided with an exhaust hole, so that moisture or volatile substances in the plasticizing process can be discharged. The plasticized melt flows into the cavity of the injection sleeve for storage. During injection molding, the screw rod firstly moves forwards under the action of the screw rod pushing cylinder, so that the screw rod seals the machine barrel outlet. And then the machine barrel and the screw rod move forward together under the action of the integral moving cylinder of the machine barrel screw rod, and the melt in the injection sleeve is ejected from the nozzle to form the product. The device has a structure simpler than a plasticizing injection device of a common injection molding machine, and omits raw material drying equipment. The screw structure is similar to that of a single screw exhaust type extruder, and the processing cost is reduced.
Description
Technical Field
The invention relates to the technical field of injection molding machines, in particular to a plasticizing and injection device of an exhaust type injection molding machine.
Background
The conventional injection molding machine needs to dry the raw materials before feeding, reduces the moisture in the raw materials, and therefore needs to be externally connected with equipment such as a dryer or a dehumidifier, and the like, so that the equipment cost is increased, the structure is complex, and the energy consumption of an injection molding system is increased.
The current situation of the demand of the exhaust type injection molding machine is more and more obvious. When the exhaust type injection molding machine works, the plastic melt is melted and compressed under the extrusion action of the machine barrel and the screw, then the melt is decompressed, gas in the melt expands, bubbles are separated from the melt after being broken, and the gas is discharged from the equipment. Therefore, when the water content of the material is too high and volatile components are generated in the processing process, the material can be discharged in time, and the quality defect of the product can not be caused.
The equipment combination cost of the existing exhaust type injection molding machine is high, the screw needs to be customized again, and the processing requirement of the machine barrel is higher. Meanwhile, in the production process, the feeding mode of starved feeding is low in production efficiency.
Disclosure of Invention
The invention aims to provide a plasticizing and injection device of an exhaust type injection molding machine, and the structure relates to the technical field of injection molding machines. The device mainly comprises injection molding seat moving oil cylinders, guide rails, a machine barrel screw overall moving oil cylinder, a machine barrel screw supporting seat, a sealing assembly, a thrust bearing group, screws, a machine barrel, a plasticizing driving system, a hopper, a heating ring, an exhaust system, an injection molding sleeve, a supporting structure, a nozzle and other parts. The method is mainly characterized in that: during plasticizing, the plasticizing driving system rotates the screw rod to plasticize. The cylinder is provided with an exhaust hole which is connected with an exhaust system to exhaust the water or volatile matters in the plasticizing process. The plasticized melt flows into the cavity of the injection sleeve. During injection molding, the screw rod firstly moves forwards under the action of the screw rod pushing cylinder, so that the screw rod seals the machine barrel outlet. And then the machine barrel and the screw rod move forward together under the action of the integral moving cylinder of the machine barrel screw rod, and the melt in the injection sleeve is ejected from the nozzle to form the product. The device has a structure simpler than a plasticizing injection device of a common injection molding machine, and omits raw material drying equipment. The screw structure is similar to that of a single screw exhaust type extruder, and the processing cost is reduced.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The invention provides a plasticizing and injection molding device of an exhaust type injection molding machine, which mainly comprises the following functional components: the injection molding machine comprises an injection molding seat moving oil cylinder, an injection base and an injection seat linear guide rail, wherein the injection molding seat moving oil cylinder, the injection base and the injection seat linear guide rail realize the forward and backward movement of the whole injection seat; the driving system for realizing the rotation of the screw rod comprises a motor, a reduction gearbox body, a left thrust bearing, a gear, a right thrust bearing and an adjusting gasket, wherein a sliding key is fixed on the gear to transmit power to the screw rod, but the forward and backward movement of the screw rod is not affected; a hopper, a machine barrel, a screw, and a heater for realizing melt plasticization; an exhaust seat, a guide plate, a hydraulic cylinder and an exhaust piston for realizing the exhaust in the plasticizing process; screw pushing cylinder, screw piston, piston sealing assembly, screw pushing cylinder sealing assembly and barrel sealing assembly for realizing screw forward and backward movement; the machine barrel screw integrally moving cylinder, the injection base, the machine barrel screw supporting seat and the supporting seat linear guide rail are used for realizing the machine barrel screw integrally moving, one end of the machine barrel screw integrally moving cylinder is connected with the machine barrel screw supporting frame, the other end of the machine barrel screw integrally moving cylinder is connected with the injection base, a group of linear guide rail is paved between the injection base and the screw barrel supporting frame, and therefore low-friction movement is realized between the injection base and the screw barrel supporting frame; injection molding cylinder, nozzle and injection cylinder supporting seat for melt molding product are realized, the injection cylinder supporting seat is fixed on the injection base through bolt connection or welding, the injection cylinder supporting seat is connected with the injection cylinder through bolts, the front end of the injection cylinder is connected with the nozzle through threads, and the nozzle is screwed on the injection cylinder.
After the materials enter from the hopper, the materials are conveyed forwards through the feeding section of the screw rod, compacted and melted through the first-stage compression section, then the materials enter the exhaust section to release pressure and exhaust, at the moment, the hydraulic cylinder of the exhaust device acts to downwards press the exhaust piston, so that the inner space of the machine barrel is communicated with the external environment through the exhaust through hole of the exhaust seat. And discharging water and volatile substances in the materials, conveying the melt to a second-order compression section for compaction again, conveying the melt into a melt storage cavity of an injection cylinder through a screw metering section, and finally injecting the melt into a die to form a product.
The screw rod needs to rotate in the plasticizing process, and is realized by a motor and a reduction gearbox assembly. The left thrust bearing, the gear, the right thrust bearing and the adjusting gasket are sequentially arranged in the reduction gearbox, motor power is input to a power input shaft of the reduction gearbox, and is transmitted to the screw rod through the gear reduction system and the sliding key, so that the plasticizing process of the melt between the machine barrel and the screw rod is completed.
The screw rod sets up the exhaust section, has seted up the exhaust through-hole on the corresponding barrel, has the exhaust seat through bolted connection in the barrel outside, and the internal cavity shape of exhaust seat is the toper, and internally mounted has an exhaust piston, and the inside and outside accessible of exhaust seat runs through the exhaust hole intercommunication, and exhaust seat upside joint deflector and pneumatic cylinder, the exhaust action is driven by the pneumatic cylinder, and during the plasticization is exhausted, pneumatic cylinder drive exhaust piston pushes down, and the barrel cavity is put through with the external world and is realized exhausting. When the exhaust is not needed, the exhaust piston rises to cut off the communication between the cavity of the machine barrel and the outside.
In the injection process, plasticized melt flows into the cavity of the injection cylinder, after the storage is completed, the screw stops rotating, the screw pushes the cylinder to act, the screw piston is pushed to move forward, and the screw is driven to move forward, so that the head of the screw is in close contact with the front end of the cylinder, and a sealed whole is formed. And then the cylinder is integrally moved by the cylinder screw to act, the cylinder screw supporting seat is pulled to move forwards, and the closed whole formed by the cylinder screw compresses the melt in the injection cylinder to be ejected through the nozzle, so that the injection process is completed. In the injection molding process, the screw rod only needs to quantitatively move for a fixed distance, namely, the distance of the piston of the screw rod is the same every time, and the extrusion and closing of the melt in the machine barrel can be realized.
In the production and use process, the whole movement of the injection seat is driven by the two injection seat moving oil cylinders, so that the nozzle of the injection table can be moved to the gate position of the die. During injection, the whole movement of the cylinder screw supporting seat is driven by the two cylinder screw whole movement cylinders, so that the injection process is quick and stable. The heater is arranged outside the cylinder and outside the injection cylinder, and the part of the cylinder connected with the injection cylinder needs to be exposed, so that the heater cannot be arranged to ensure the injection stroke.
The invention provides a plasticizing injection molding device of an exhaust type injection molding machine, which has the advantages that:
(1) The existing injection molding machine materials need to be dried, and the water content and volatile substances in the processing process are excessive, so that product defects can be caused. The structure is complex by adding a dryer or dryer equipment. The device can be used for removing moisture and volatile matters without drying equipment in the running process of the equipment.
(2) The plasticizing screw of the injection molding machine provided by the invention has a simple structure, the injection molding process can be realized by using the exhaust screw of the extruder, the screw structure is simplified, and better plasticizing effect can be realized by adding different screw elements.
(3) The movement of the barrel screw and the integral movement of the injection seat are realized through the linear guide rail, so that the action is more accurate and the precision is higher.
(4) Compared with the existing exhaust type injection molding machine, the plasticizing injection molding device of the exhaust type injection molding machine provided by the invention has the advantages of simpler structure and lower manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of a plasticizing injection apparatus of an exhaust type injection molding machine of the present invention;
FIG. 2 is a schematic diagram of the arrangement of the cylinder and linear guide rail of the plasticizing injection apparatus of the exhaust type injection molding machine of the present invention;
FIG. 3 is a schematic view of the state of the screw head and barrel of the screw barrel of the present invention at the time of plasticizing;
FIG. 4 is a schematic view of the screw head and barrel of the screw barrel of the present invention at the time of injection;
FIG. 5 is a schematic view of the venting structure on the barrel of the present invention.
In the figure, a 1-injection seat moving cylinder, a 2-machine barrel screw integral moving cylinder, a 3-injection seat base, a 4-machine barrel screw supporting seat, a 5-machine barrel sealing assembly, a 6-left thrust bearing, a 7-gear, an 8-right thrust bearing, a 9-adjusting gasket, a 10-supporting seat linear guide rail, a 11-injection seat linear guide rail, a 12-screw pushing cylinder, a 13-screw piston, a 14-piston sealing assembly, a 15-screw pushing cylinder sealing assembly, a 16-motor, a 17-reduction gearbox box body, a 18-hopper, a 19-heating ring, a 20-machine barrel, a 21-exhaust seat, a 22-guide plate, a 23-hydraulic cylinder, a 24-exhaust piston, a 25-screw, a 26-injection barrel supporting seat, a 27-injection barrel, a 28-nozzle, a 101-injection seat moving cylinder b and a 202-machine barrel screw integral moving cylinder b.
Detailed Description
The invention is further illustrated by the following specific examples. The following description is of only a few embodiments and any other embodiments that are not inventive based on the inventive examples of this invention are intended to fall within the scope of this invention.
In the description of the present invention, terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used for the convenience of description and the simplification of the description based on the azimuth or the positional relationship shown in the drawings, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, configuration, and operation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, unless otherwise specifically indicated and defined. Examples: the connection can be fixed connection, detachable connection or integral connection; can be directly connected or indirectly connected through an intermediate medium. The driving device may be driven by a motor or hydraulically. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art depending on the specific circumstances.
The invention provides a plasticizing and injection molding device of an exhaust type injection molding machine, which is shown in fig. 1 and 2, and mainly comprises the following functional components: the injection molding base moving cylinder 1, the injection base 3 and the injection base linear guide rail 11 for realizing the front and back movement of the whole injection base are arranged, the cylinder body of the injection molding base moving cylinder 1 is fixed on the injection base 3, the piston rod is connected to the injection molding machine body, the injection base linear guide rail 11 is paved between the injection base 3 and the injection molding machine body, and the injection molding part and the injection molding machine body realize low friction movement; the driving system for realizing the rotation of the screw rod comprises a motor 16, a reduction box body 17, a left thrust bearing 6, a gear 7, a right thrust bearing 8 and an adjusting gasket 9, wherein a sliding key is fixed on the gear, and the power is transmitted to the screw rod 25, but the forward and backward movement of the screw rod 25 is not influenced; hopper 18, barrel 20, screw 25, heater 19 to achieve melt plasticization; the exhaust seat 21, the guide plate 22, the hydraulic cylinder 23 and the exhaust piston 24 realize the exhaust in the plasticizing process; a screw pushing cylinder 12, a screw piston 13, a piston sealing assembly 14, a screw pushing cylinder sealing assembly 15 and a machine barrel sealing assembly 5 for realizing the forward and backward movement of the screw; the machine barrel screw integrally moving cylinder 2 for realizing the machine barrel screw integrally moving, the injection base 3, the machine barrel screw supporting seat 4 and the supporting seat linear guide rail 10, wherein one end of the machine barrel screw integrally moving cylinder 2 is connected with the machine barrel screw supporting frame 4, the other end of the machine barrel screw integrally moving cylinder is connected with the injection base 3, and a group of supporting seat linear guide rail 10 is paved between the injection base 3 and the screw barrel supporting frame 4, so that low friction movement is realized between the injection base and the screw barrel supporting frame; the injection molding machine is characterized in that parts such as an injection molding barrel 27, a nozzle 28, an injection barrel supporting seat 26 and the like of a melt molding product are realized, the injection barrel supporting seat 26 is fixed on the injection base 3 through bolt connection or welding, the injection barrel supporting seat 26 and the injection barrel 27 are connected through bolts, the front end of the injection barrel 27 is connected with the nozzle 28 through threads, and the nozzle 28 is screwed on the injection barrel 27.
After the materials enter from the hopper 18, the materials are conveyed forwards through a feeding section of a screw 25, compacted and melted through a first-stage compression section, then the materials enter an exhaust section for pressure relief and exhaust, at the moment, a hydraulic cylinder 23 of an exhaust device acts to downwards press an exhaust piston 24, so that the inner space of the machine barrel is communicated with the external environment through an exhaust through hole of an exhaust seat, and the concrete structure is shown in figure 5. The moisture and volatile substances in the material are discharged, the melt is conveyed to a second-order compression section for compaction again, finally the melt is conveyed into a melt storage cavity of an injection cylinder 27 through a metering section of a screw 25, and finally the melt is injected into a mould to form a product.
The screw 25 needs to rotate during plasticization, which is achieved by a motor and reduction gearbox assembly. The left thrust bearing 6, the gear 7, the right thrust bearing 8 and the adjusting gasket 9 are sequentially arranged in the reduction gearbox, the power of the motor 16 is input to the power input shaft of the reduction gearbox, and is transmitted to the screw 25 through the gear reduction system and the sliding key, so that the plasticizing process of the melt between the machine barrel 20 and the screw 25 is completed.
The screw rod 25 is provided with the exhaust section, has offered the exhaust through-hole on the corresponding barrel, and the outside of barrel 20 has through bolted connection to exhaust seat 21, and the internal cavity shape of exhaust seat 21 is the toper, internally mounted has an exhaust piston 24, and the inside and outside accessible of exhaust seat 21 runs through the exhaust hole intercommunication, and the upper side of exhaust seat 21 has deflector 22 and pneumatic cylinder 23, and the exhaust action is driven by pneumatic cylinder 23, and during plasticization exhaust, pneumatic cylinder 23 drive exhaust piston 24 pushes down, and the cavity of barrel 20 is put through with the external world and is realized the exhaust. When venting is not desired, vent piston 24 is raised, cutting off the communication between the cavity of barrel 20 and the outside.
In the injection process, the plasticized melt flows into the cavity of the injection cylinder 27, the states of the front ends of the cylinder 20 and the screw 25 in the storage process are shown in fig. 3, after the storage is completed, the screw 25 stops rotating, the screw pushes the right side of the cylinder 12 to feed oil, the screw piston 13 is pushed to move forward, the screw 25 is driven to move forward, the head of the screw 25 is in close contact with the front end of the cylinder 20 to form a sealed whole, and the states of the front ends of the cylinder 20 and the screw 25 after the sealing are shown in fig. 4. Then the cylinder screw integral moving cylinder 2 acts to pull the cylinder screw supporting seat 4 to move forwards, and the closed integral formed by the cylinder screw compresses the melt in the injection cylinder 27 to be ejected through the nozzle 28, so as to complete the injection process. During injection molding, screw 25 need only be moved quantitatively a fixed distance, i.e., the distance that screw piston 13 moves is the same each time, so that extrusion and closing of melt within barrel 20 can be achieved.
In the production and use process, the whole movement of the injection seat is driven by two injection seat moving cylinders, namely, the injection seat moving cylinder 1 and the injection seat moving cylinder b 101 act simultaneously, so that the nozzle 28 of the injection molding device can move to the gate position of the mold. During injection, the whole movement of the cylinder screw supporting seat is driven by two cylinder screw whole movement cylinders, namely a cylinder screw whole movement cylinder 2 and a cylinder screw whole movement cylinder b 202, so that the injection process is rapid and stable. The heater 19 is disposed outside the cylinder 20 and outside the syringe 27, and a portion of the cylinder 20 connected to the syringe 27 needs to be exposed, and the heater 19 cannot be disposed to secure an injection stroke.
Claims (3)
1. The utility model provides a plasticization injection molding device of exhaust formula injection molding machine which characterized in that: mainly comprises the following functional components: the injection molding machine comprises an injection molding seat moving oil cylinder, an injection base and an injection seat linear guide rail, wherein the injection molding seat moving oil cylinder, the injection base and the injection seat linear guide rail realize the forward and backward movement of the whole injection seat; the driving system for realizing the rotation of the screw rod comprises a motor, a reduction gearbox body, a left thrust bearing, a gear, a right thrust bearing and an adjusting gasket, wherein a sliding key is fixed on the gear to transmit power to the screw rod, but the forward and backward movement of the screw rod is not affected; a hopper, a machine barrel, a screw, and a heater for realizing melt plasticization; an exhaust seat, a guide plate, a hydraulic cylinder and an exhaust piston for realizing the exhaust in the plasticizing process; screw pushing cylinder, screw piston, piston sealing assembly, screw pushing cylinder sealing assembly and barrel sealing assembly for realizing screw forward and backward movement; the machine barrel screw integrally moving cylinder, the injection base, the machine barrel screw supporting seat and the supporting seat linear guide rail are used for realizing the machine barrel screw integrally moving, one end of the machine barrel screw integrally moving cylinder is connected with the machine barrel screw supporting frame, the other end of the machine barrel screw integrally moving cylinder is connected with the injection base, a group of linear guide rail is paved between the injection base and the screw barrel supporting frame, and therefore low-friction movement is realized between the injection base and the screw barrel supporting frame; the injection molding device comprises an injection molding cylinder, a nozzle and an injection cylinder supporting seat for realizing melt molding products, wherein the injection cylinder supporting seat is fixedly arranged on an injection base through bolt connection or welding, the injection cylinder supporting seat is connected with the injection cylinder through bolts, the front end of the injection cylinder is connected with the nozzle through threads, and the nozzle is screwed on the injection cylinder; the screw is provided with an exhaust section, an exhaust through hole is formed in the corresponding machine barrel, the outer side of the machine barrel is connected with an exhaust seat through a bolt, the inner cavity of the exhaust seat is conical, an exhaust piston is arranged in the exhaust seat, the inside and the outside of the exhaust seat can be communicated through a through exhaust hole, the upper side of the exhaust seat is connected with a guide plate and a hydraulic cylinder, the exhaust action is driven by the hydraulic cylinder, the hydraulic cylinder drives the exhaust piston to press down when plasticizing and exhausting, and the cavity of the machine barrel is communicated with the outside to realize exhaust; when the exhaust is not needed, the exhaust piston rises to cut off the communication between the cavity of the machine barrel and the outside.
2. The plasticizing injection apparatus of a vented injection molding machine as defined in claim 1, wherein: the screw rod needs to rotate in the plasticizing process, the plasticizing process is realized by a motor and a reduction gearbox assembly, a left thrust bearing, a gear, a right thrust bearing and an adjusting gasket are sequentially arranged in the reduction gearbox, motor power is input to a reduction gearbox power input shaft, and is transmitted to the screw rod through a gear reduction system and a sliding key, so that the plasticizing process of melt between a machine barrel and the screw rod is completed.
3. The plasticizing injection apparatus of a vented injection molding machine as defined in claim 1, wherein: the whole movement of the injection seat is driven by two injection seat moving oil cylinders, so that the nozzle of the injection table can move to the gate position of the mold, and the whole movement of the cylinder screw supporting seat is driven by two cylinder screw whole moving oil cylinders, so that the injection process is rapid and stable; the heater is arranged outside the cylinder and outside the injection cylinder, and the part of the cylinder connected with the injection cylinder needs to be exposed, so that the heater cannot be arranged to ensure the injection stroke.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110636231.1A CN113290775B (en) | 2021-06-08 | 2021-06-08 | Plasticizing injection molding device of exhaust type injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110636231.1A CN113290775B (en) | 2021-06-08 | 2021-06-08 | Plasticizing injection molding device of exhaust type injection molding machine |
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| CN113290775B true CN113290775B (en) | 2024-05-28 |
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|---|---|---|---|---|
| CN113752463A (en) * | 2021-09-27 | 2021-12-07 | 德玛克（长兴）注塑系统有限公司 | Single-order bottle base injection molding machine penetrates a mechanism |
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