CN113601784B - Asymmetric vibration injection method and system - Google Patents
Asymmetric vibration injection method and system Download PDFInfo
- Publication number
- CN113601784B CN113601784B CN202110745144.XA CN202110745144A CN113601784B CN 113601784 B CN113601784 B CN 113601784B CN 202110745144 A CN202110745144 A CN 202110745144A CN 113601784 B CN113601784 B CN 113601784B
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- injection
- driver
- acceleration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 title claims abstract description 117
- 239000007924 injection Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000001133 acceleration Effects 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000155 melt Substances 0.000 claims abstract description 15
- 230000000737 periodic effect Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- 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
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising 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
- B29C45/58—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
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to an asymmetric vibration injection method and a system, which are characterized in that a first driver is started to drive a screw rod to run in a charging barrel; plasticizing materials in the charging barrel into melt by means of conveying and plasticizing functions of the screw rod, and conveying the melt to the nozzle; finally, the output of the second driver is started and controlled by the electric control device. At this time, the screw is driven by the second driver to perform the forward injection movement in the axial direction of the screw while periodically oscillating back and forth. The screw rod sequentially and alternately goes through an acceleration stage and a deceleration stage in any vibration period, and the working parameters of the acceleration stage are different from those of the deceleration stage, so that the screw rod can do reciprocating acceleration and deceleration movement in the axial direction on the basis of the original operation, and differential asymmetric vibration control of the screw rod in the axial direction is realized. Thus, the asymmetric vibration injection method optimizes the extrusion molding processing process by utilizing the asymmetric vibration effect of the screw rod, and improves the processing efficiency and the product quality of molded products.
Description
Technical Field
The invention relates to the technical field of vibration injection, in particular to an asymmetric vibration injection method and an asymmetric vibration injection system.
Background
The polymer injection molding is widely applied in the modern industry due to the characteristics of simple processing, high production efficiency, higher dimensional accuracy of molded products and the like. Plasticizing injection apparatus is one of the key components of injection molding equipment, and its performance directly affects the efficiency of injection molding and the quality of the article.
The traditional reciprocating screw type injection molding machine has the functions of plasticizing and injecting, so that the screw can perform rotary motion to complete the transportation and plasticizing of materials, and simultaneously can perform reciprocating axial motion to perform injection molding. However, the screw rod moves axially during plasticizing, so that a large axial temperature difference exists in the molten material, and the processing efficiency and the molding quality of the product are affected.
Disclosure of Invention
Based on the above, it is necessary to provide an asymmetric vibration injection method and system capable of achieving differential asymmetric vibration control of the screw in the axial direction and improving the processing efficiency and product quality of molded products.
An asymmetric vibration injection method, comprising the steps of: heating the charging barrel to a preset temperature; starting a first driver to drive a screw rod to run in the charging barrel; feeding a material into a charging barrel, plasticizing the material into a melt, and conveying the melt to a nozzle of the charging barrel; and starting and controlling the output of the second driver to enable the screw to perform forward injection motion in the axis direction of the screw and periodically perform reciprocating vibration at the same time, wherein the screw sequentially goes through an acceleration stage and a deceleration stage in any vibration period, and controlling the operation parameters in the acceleration stage to be different from the operation parameters in the deceleration stage, wherein the operation parameters comprise at least one of an injection speed vibration change mode and an injection speed vibration change time.
In the asymmetric vibration injection method, the first driver is started to drive the screw rod to run in the charging barrel; then, plasticizing the materials in the charging barrel into melt by means of the conveying and plasticizing functions of the screw rod, and conveying the melt to the nozzle; finally, the output of the second driver is enabled and controlled. At this time, the screw is driven by the second driver to perform the forward injection movement in the axial direction of the screw while periodically oscillating back and forth. The screw rod sequentially and alternately goes through an acceleration stage and a deceleration stage in any vibration period, and the operation parameters of the acceleration stage are different from those of the deceleration stage, so that the screw rod can perform reciprocating acceleration and deceleration movement in the axial direction on the basis of the original operation, and differential asymmetric vibration control of the screw rod in the axial direction is realized. Therefore, the asymmetric vibration injection method optimizes the extrusion molding processing process by utilizing the asymmetric vibration effect of the screw rod, and realizes the accurate control of the axial vibration of the screw rod, thereby improving the processing efficiency and the product quality of molded products.
In one embodiment, the operating parameter includes injection speed vibration variation time, and the first time t used for accelerating from the first injection speed to the second injection speed in the acceleration stage 1 Less than a second time t taken to slow down from a second injection speed to a first injection speed in said deceleration phase 2 。
In one embodiment, in the acceleration phase, the screw is accelerated from the first injection speed to the second injection speed at a first constant acceleration.
In one embodiment, in the deceleration phase, the screw is decelerated from the second injection speed to the first injection speed at a second constant acceleration, and the second constant acceleration is less than the first constant acceleration.
In one embodiment, the method further comprises: after the injection action is completed, periodically changing pressure is applied to the screw rod along the axial direction of the screw rod so as to maintain the pressure of the product in the die.
In one embodiment, the step of applying a periodically varying pressure to the screw in the axial direction of the screw comprises: in any pressing period, the pressure applied to the screw rod along the axial direction of the screw rod is increased from the first pressure to the second pressure, and the pressurizing time is controlled to be a third time t 3 The method comprises the steps of carrying out a first treatment on the surface of the After pressurization, the pressure applied to the screw rod along the axial direction of the screw rod is reduced from the second pressure to the first pressure, and the depressurization time is controlled to be a fourth time t 4 And the third time t 3 Less than the fourth time t 4 。
In one embodiment, the step of enabling and controlling the output of the second driver comprises: starting a hydraulic pump and the second driver; and opening an electromagnetic reversing valve to control the hydraulic pump to periodically supply oil to the second driver.
An asymmetric vibration injection system employing the asymmetric vibration injection method of any one of the above, the asymmetric vibration injection system comprising: a slide; the feeding barrel is internally provided with a feeding cavity, and a feeding port and a nozzle which are communicated with the feeding cavity are arranged on the feeding barrel; the injection part is arranged on the sliding seat in a sliding way and comprises a first driver, a screw rod and a heater, the heater is arranged on the charging barrel, at least one part of the screw rod stretches into the charging cavity, and the first driver is in driving connection with the screw rod so as to drive the screw rod to operate; the second driver is in driving connection with the screw rod so as to drive the screw rod to move along the axis direction of the screw rod and periodically vibrate in a reciprocating manner; and the electric control device is in control fit with the second driver so as to control the asymmetric periodic output of the second driver.
The asymmetric vibration injection system adopts the asymmetric vibration injection method, and the first driver is started to drive the screw rod to run in the charging barrel; then, plasticizing the materials in the charging barrel into melt by means of the conveying and plasticizing functions of the screw rod, and conveying the melt to the nozzle; finally, the output of the second driver is started and controlled by the electric control device. At this time, the screw is driven by the second driver to perform the forward injection movement in the axial direction of the screw while periodically oscillating back and forth. The screw rod sequentially and alternately goes through an acceleration stage and a deceleration stage in any vibration period, and the operation parameters of the acceleration stage are different from those of the deceleration stage, so that the screw rod can perform reciprocating acceleration and deceleration movement in the axial direction on the basis of the original operation, and differential asymmetric vibration control of the screw rod in the axial direction is realized. Therefore, the asymmetric vibration injection method optimizes the extrusion molding processing process by utilizing the asymmetric vibration effect of the screw rod, and realizes the accurate control of the axial vibration of the screw rod, thereby improving the processing efficiency and the product quality of molded products.
In one embodiment, the injection component further comprises a coupling through which the output shaft of the first drive is in driving connection with the screw.
In one embodiment, the electric control device comprises a hydraulic pump, an electromagnetic directional valve and a controller, wherein the hydraulic pump and the electromagnetic directional valve are electrically connected with the controller, and the hydraulic pump is in control fit with the second driver through the electromagnetic directional valve.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an asymmetric vibration injection system according to one embodiment;
FIG. 2 is a graph of injection velocity versus injection time as described in one embodiment;
FIG. 3 is a graph of applied pressure versus injection time as described in one embodiment;
FIG. 4 is a schematic flow chart of an asymmetric vibration injection method according to one embodiment;
FIG. 5 is a flow chart of a second embodiment of an asymmetric vibration injection method;
FIG. 6 is a flow chart III of an asymmetric vibration injection method according to an embodiment;
FIG. 7 is a flow chart of an asymmetric vibration injection method according to an embodiment.
100. An asymmetric vibratory injection system; 110. a charging barrel; 111. a material cavity; 112. a feed inlet; 113. a nozzle; 114. a hopper; 120. an injection member; 121. a first driver; 122. a screw; 123. a coupling; 124. a heater; 125. a non-return ring; 130. a second driver; 140. an electric control device; 141. a hydraulic pump; 142. an electromagnetic reversing valve; 143. a controller; 150. a slide; 200. a material; 210. a melt; 220. an article; 300. a mold; 310. and a material injection port.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In one embodiment, please refer to fig. 1 and 4, an asymmetric vibration injection method, the asymmetric vibration injection method comprises the following steps:
s100, heating the charging barrel 110 to a preset temperature;
s200, starting the first driver 121 to drive the screw 122 to run in the charging barrel 110;
s300, feeding the material 200 into the material cylinder 110, plasticizing the material 200 into a melt 210, and conveying the melt to the nozzle 113 of the material cylinder 110;
s400, starting and controlling the output of the second driver 130 to make the screw 122 perform the forward injection motion in the axial direction of the screw 122 while performing the periodic reciprocating vibration, wherein the screw 122 sequentially undergoes an acceleration phase and a deceleration phase in any vibration period, and controlling the operation parameters in the acceleration phase to be different from the operation parameters in the deceleration phase, the operation parameters including at least one of an injection speed vibration variation mode and an injection speed vibration variation time.
In the asymmetric vibration injection method, the first driver 121 is started to drive the screw 122 to run in the charging barrel 110; next, the material 200 in the barrel 110 is plasticized into a melt 210 by means of the conveying and plasticizing functions of the screw 122, and is conveyed to the nozzle 113; finally, the output of the second driver 130 is enabled and controlled. At this time, the screw 122 is simultaneously periodically reciprocated in the forward injection motion along its own axis direction by the second driver 130. Since the screw 122 sequentially and alternately goes through the acceleration phase and the deceleration phase in any vibration period, and the operation parameters of the acceleration phase are different from those of the deceleration phase, the screw 122 can perform reciprocating acceleration and deceleration movements in the axial direction on the basis of the original operation, so as to realize differential asymmetric vibration control of the screw 122 in the axial direction. In this way, the asymmetric vibration injection method optimizes the extrusion molding processing process by utilizing the asymmetric vibration effect of the screw 122, and realizes the precise control of the axial vibration of the screw 122, thereby improving the processing efficiency of the molded product 220 and the quality of the product 220.
It should be noted that the operation parameters in the acceleration phase are to be distinguished from the operation parameters in the deceleration phase as follows: the operating parameters of the screw 122 vibration in the acceleration phase and the deceleration phase are inconsistent, i.e., the operating parameters of the screw 122 in the acceleration phase and the deceleration phase are differentiated, asymmetric. Meanwhile, the injection speed vibration change mode is an injection acceleration mode or an injection deceleration mode of the screw 122. In the acceleration stage or the deceleration stage, the screw 122 may perform the vibration change of the injection speed by adopting a constant acceleration (the acceleration may be positive or negative, and the negative represents the deceleration process), or may gradually increase or decrease the acceleration; of course, the acceleration of the screw 122 may be changed in a stepwise manner in the acceleration stage and the deceleration stage.
Alternatively, the first driver 121 may be a motor, an electric cylinder, a hydraulic cylinder, an oil cylinder, or the like. When the first driver 121 is an electric cylinder, a hydraulic cylinder or an oil cylinder, a power conversion structure is added between the first driver 121 and the screw 122 to convert the linear movement into a rotation motion. For example: the power conversion structure may be a rocker crank structure or the like. Meanwhile, the second driver 130 may be an electric cylinder, a hydraulic cylinder, an oil cylinder, or the like.
It should be noted that, the execution sequence between the step S100 and the step S200 in the present embodiment may execute the step S100 first; step S200 may also be performed first. Of course, step S100 and step S200 may also be performed simultaneously. In addition, the relationship between the material 200, the melt 210, and the article 220 is: the material 200 is fed into the barrel 110 and forms a melt 210 upon heating and plasticization of the screw 122. The formed melt 210 is injected into the mold 300 under injection of the screw 122 to form the article 220.
Specifically, the execution sequence between step S100 and step S200 is: step S100 is performed first, and step S200 is performed later.
In addition, the forward injection movement of the screw 122 in the axial direction of the screw 122 while periodically reciprocating vibration is understood to be: after the second driver 130 is started, the injection part 120 with the screw 122 can be driven to perform forward injection movement towards the direction of the mold 300. However, as the screw 122 undergoes an acceleration phase followed by a deceleration phase relative to the screw 122 itself, the screw 122 exhibits a relatively reciprocating periodic vibratory motion within the barrel 110.
Further, referring to fig. 1 and 2, the operation parameters include the variation time of the vibration of the injection speed, and the first time t for accelerating from the first injection speed to the second injection speed in the acceleration stage 1 Less than a second time t taken to slow down from a second injection speed to a first injection speed during the deceleration phase 2 Reference is specifically made to FIG. 2, V in FIG. 2 1 For the first injection speed, V 2 A second injection rate. In any vibration cycle, the injection speed of the screw 122 in the acceleration stage and the deceleration stage is not consistent in time, so that the vibration of the screw 122 in the axial direction is asymmetric, and the vibration of the screw 122 is accurately and variously controlled. In addition, a first time t 1 Less than the second time t 2 In this way, the screw 122 is ensured to have large forward impact and smaller backward buffer in the injection process, so that the product 220 of the die 300 is more compact, and the quality of the molded product 220 is further effectively improved.
Further, referring to fig. 1 and 2, in the acceleration stage, the screw 122 is accelerated from the first injection speed to the second injection speed at a first constant acceleration, i.e. the screw 122 adopts a constant acceleration mode in the acceleration stage.
It should be noted that, in the deceleration stage, the screw 122 may decelerate at a constant acceleration, but the acceleration should be kept different from the acceleration in the acceleration stage; of course, the screw 122 may be decelerated with varying acceleration.
In one embodiment, referring to fig. 1 and 2, in the deceleration phase, the screw 122 is decelerated from the second injection speed to the first injection speed at a second constant acceleration, and the second constant acceleration is smaller than the first constant acceleration. It can be seen that the screw 122 adopts a constant acceleration mode in both the acceleration stage and the deceleration stage. At the same time, the second constant acceleration is also ensured to be smaller than the first constant acceleration, so as to ensure that the screw 122 is asymmetrically vibrated in any period.
In one embodiment, referring to fig. 1 and 5, the method further includes:
s500, after the injection operation is completed, a periodically varying pressure is applied to the screw 122 along the axial direction of the screw 122 to maintain the pressure of the product 220 in the mold 300. In this way, after the injection is completed, the screw 122 is subjected to a periodically varying pressure, so that the product 220 is effectively pressurized, and the quality of the product 220 is further improved.
It should be noted that the pressing action on the screw 122 may be performed by the first driver 121 or the second driver 130. In this regard, the present embodiment is not particularly limited, and it is only required to perform the pressure maintaining operation on the screw 122 after the injection is completed. In addition, in order to accurately control the pressure value on the screw 122, a pressure sensor or the like may be provided on the screw 122 to acquire the pressure value on the screw 122 in real time.
It should be noted that the periodically varying pressure should include at least a symmetrical periodically varying pressure and an asymmetrical periodically varying pressure. Wherein an asymmetric periodically varying pressure is understood as: in either pressurization cycle, when pressure is applied to the screw 122, the data during pressurization and depressurization are inconsistent and are not provided in a symmetrical manner.
Further, referring to fig. 1 and 6, the step S500 of applying a periodically varying pressure to the screw 122 along the axial direction of the screw 122 includes:
s510, in any pressing period, the pressure applied to the screw 122 along the axial direction of the screw 122 is increased from the first pressure to the second pressure, and the pressurizing time is controlled to be a third time t 3 ；
S520, after the pressurization, the pressure applied to the screw 122 along the axial direction of the screw 122 is reduced from the second pressure to the first pressure, and the depressurization time is controlled to be a fourth time t 4 And a third time t 3 Less than the fourth time t 4 . In the process of maintaining the pressure, the asymmetric periodically varying pressure is applied to the screw 122 to control the compression of the screw 122 in a diversified and differentiated manner, so that the compacting effect of the product 220 of the mold 300 is better, and reference may be made to fig. 3, and P in fig. 3 1 At a first pressure, P 2 Is the second pressure.
In one embodiment, referring to fig. 1 and 7, S400, the step of starting and controlling the output of the second driver 130 includes:
s410, starting the hydraulic pump 141 and the second driver 130;
s420, the electromagnetic directional valve 142 is opened and adjusted, and the hydraulic pump 141 is controlled to periodically supply oil to the second driver 130. As can be seen from this, the hydraulic pump 141 is started when the output of the second driver 130 is controlled; the electromagnetic directional valve 142 is opened, and the oil supply amount of the hydraulic pump 141 into the second driver 130 is controlled to realize asymmetric periodic vibration of the screw 122 by the second driver 130.
Specifically, the second driver 130 is an oil cylinder.
In one embodiment, the method is preceded by: before injection, the nozzle 113 of the cartridge 110 is inserted into the nozzle 310 of the mold 300.
In one embodiment, referring to FIG. 1, an asymmetric vibration injection system 100 is provided using the asymmetric vibration injection method of any of the above embodiments. The asymmetric vibration injection system 100 includes: the slide 150, the cartridge 110, the injection component 120, the second driver 130, and the electronic control device 140. The material cylinder 110 is internally provided with a material cavity 111, and the material cylinder 110 is provided with a material inlet 112 and a nozzle 113 which are communicated with the material cavity 111. The injection part 120 is slidably mounted on the carriage 150, and the injection part 120 includes a first driver 121, a screw 122 and a heater 124. The heater 124 is disposed on the cartridge 110. At least a portion of the screw 122 extends into the feed cavity 111. The first driver 121 is in driving connection with the screw 122 to drive the screw 122 to operate. The second driver 130 is drivingly connected to the screw 122 to drive the screw 122 to move along the axial direction of the screw 122 while periodically oscillating reciprocally. The electronic control device 140 is in control cooperation with the second driver 130 to control the asymmetric periodic output of the second driver 130.
The asymmetric vibration injection system 100 described above, using the above asymmetric vibration injection method, activates the first driver 121 to drive the screw 122 to run in the barrel 110; next, the material 200 in the barrel 110 is plasticized into a melt 210 by means of the conveying and plasticizing functions of the screw 122, and is conveyed to the nozzle 113; finally, the output of the second driver 130 is activated and controlled by the electronic control unit 140. At this time, the screw 122 is simultaneously periodically reciprocated in the forward injection motion along its own axis direction by the second driver 130. Since the screw 122 sequentially and alternately goes through the acceleration phase and the deceleration phase in any vibration period, and the working parameters of the acceleration phase are different from those of the deceleration phase, the screw 122 can perform reciprocating acceleration and deceleration movements in the axial direction on the basis of the original operation, so as to realize differential asymmetric vibration control of the screw 122 in the axial direction. In this way, the asymmetric vibration injection method optimizes the extrusion molding processing process by utilizing the asymmetric vibration effect of the screw 122, and realizes the precise control of the axial vibration of the screw 122, thereby improving the processing efficiency of the molded product 220 and the quality of the product 220.
It should be noted that the sliding mounting of the injection member 120 on the carriage 150 may be, but is not limited to, a rail mounting. Meanwhile, the electronic control device 140 controls the asymmetric periodic output of the second driver 130 to be understood as: the output of the second driver 130 to the screw 122 is a periodic output, and in any period, the output curve is asymmetrically arranged, where asymmetry includes both the injection speed vibration variation pattern and the injection speed vibration variation time, etc.
Specifically, referring to fig. 1, a hopper 114 is provided on the cartridge 110. Hopper 114 is in communication with feed inlet 112.
Further, referring to fig. 1, the injection component 120 further includes a coupling 123. The output shaft of the first driver 121 is in driving connection with the screw 122 through a coupling 123 to ensure that the torque of the first driver 121 is stably transmitted to the screw 122, so that the screw 122 stably operates in the cartridge 110.
In one embodiment, referring to fig. 1, the electric control device 140 includes a hydraulic pump 141, a solenoid directional valve 142, and a controller 143. The hydraulic pump 141 and the electromagnetic directional valve 142 are electrically connected to the controller 143. The hydraulic pump 141 is in control engagement with the second driver 130 through the electromagnetic directional valve 142, so that the hydraulic pump 141 is started when the output of the second driver 130 is controlled; the electromagnetic directional valve 142 is opened, and the oil supply amount of the hydraulic pump 141 into the second driver 130 is controlled to realize asymmetric periodic vibration of the screw 122 by the second driver 130.
In one embodiment, referring to FIG. 1, a check ring 125 is sleeved on the screw 122 to prevent backflow of the melt 210 in the barrel 110 during injection, thereby ensuring that injection is stable.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Claims (7)
1. An asymmetric vibration injection method employing an asymmetric vibration injection system, the asymmetric vibration injection system comprising:
a slide;
the feeding barrel is internally provided with a feeding cavity, and a feeding port and a nozzle which are communicated with the feeding cavity are arranged on the feeding barrel;
the injection part is arranged on the sliding seat in a sliding way and comprises a first driver, a screw rod and a heater, the heater is arranged on the charging barrel, at least one part of the screw rod stretches into the charging cavity, and the first driver is in driving connection with the screw rod so as to drive the screw rod to operate;
the second driver is in driving connection with the screw rod so as to drive the screw rod to move along the axis direction of the screw rod and periodically vibrate in a reciprocating manner;
the electric control device is in control fit with the second driver to control the asymmetric periodic output of the second driver;
the asymmetric vibration injection method is characterized by comprising the following steps of:
heating the charging barrel to a preset temperature;
starting a first driver to drive a screw rod to run in the charging barrel;
feeding a material into a charging barrel, plasticizing the material into a melt, and conveying the melt to a nozzle of the charging barrel;
initiating and controlling the output of a second drive to cause the screw to reciprocate periodically while in forward injection motion in the axial direction of the screw, wherein the screw is sequentially subjected to an acceleration phase and a deceleration phase during any one vibration cycle, and wherein the operating parameters in the acceleration phase are controlled to be different from the operating parameters in the deceleration phase, the operating parameters including the injection speed vibration variation time, and the first time t for acceleration from a first injection speed to a second injection speed during the acceleration phase 1 Less than a second time t taken to slow down from a second injection speed to a first injection speed in said deceleration phase 2 The method comprises the steps of carrying out a first treatment on the surface of the The simultaneous periodic reciprocating vibration of the forward injection motion in the axial direction of the screw is understood to be: after the second driver is started, the whole injection part with the screw rod is driven to move forward in the direction of the die, and compared with the screw rod, the screw rod firstly undergoes an acceleration stage and then a deceleration stage, and the screw rod presents relative reciprocating periodic vibration in the charging barrel;
in the acceleration phase, the screw accelerates from the first injection speed to the second injection speed at a first constant acceleration, in the deceleration phase, the screw decelerates from the second injection speed to the first injection speed at a second constant acceleration, and the second constant acceleration is less than the first constant acceleration;
after the injection action is completed, applying periodically-changing pressure to the screw rod along the axial direction of the screw rod so as to maintain the pressure of the product in the die; wherein the step of applying a periodically varying pressure to the screw in the axial direction of the screw comprises:
in any pressing period, the pressure applied to the screw rod along the axial direction of the screw rod is controlled from the firstA pressure is increased to a second pressure, and the pressurizing time is controlled to be a third time t 3 ；
After pressurization, the pressure applied to the screw rod along the axial direction of the screw rod is reduced from the second pressure to the first pressure, and the depressurization time is controlled to be a fourth time t 4 And the third time t 3 Less than the fourth time t 4 。
2. The method of asymmetric vibration injection as claimed in claim 1, wherein the step of activating and controlling the output of the second driver comprises:
starting a hydraulic pump and the second driver;
and opening an electromagnetic reversing valve to control the hydraulic pump to periodically supply oil to the second driver.
3. The method of claim 1, wherein the nozzle of the cartridge is inserted into the nozzle of the mold prior to injection.
4. The method of claim 1, wherein the second actuator is a ram.
5. The method of claim 1, wherein the injection member further comprises a coupling through which the output shaft of the first driver is drivingly connected to the screw.
6. The method of claim 1, wherein the electronic control device comprises a hydraulic pump, an electromagnetic directional valve and a controller, wherein the hydraulic pump and the electromagnetic directional valve are electrically connected with the controller, and the hydraulic pump is in control fit with the second driver through the electromagnetic directional valve.
7. The method of claim 1, wherein the screw is sleeved with a check ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745144.XA CN113601784B (en) | 2021-06-30 | 2021-06-30 | Asymmetric vibration injection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110745144.XA CN113601784B (en) | 2021-06-30 | 2021-06-30 | Asymmetric vibration injection method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113601784A CN113601784A (en) | 2021-11-05 |
| CN113601784B true CN113601784B (en) | 2024-02-27 |
Family
ID=78337163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110745144.XA Active CN113601784B (en) | 2021-06-30 | 2021-06-30 | Asymmetric vibration injection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113601784B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141842A (en) * | 1996-07-05 | 1997-02-05 | 华南理工大学 | Electromagnetic polymer dynamic injection forming method and apparatus thereof |
| CN1663771A (en) * | 2005-03-08 | 2005-09-07 | 华南理工大学 | Injector screw axial pulse displacement method and apparatus |
| CN1974173A (en) * | 2006-12-07 | 2007-06-06 | 华南理工大学 | Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus |
| CN200967270Y (en) * | 2006-04-25 | 2007-10-31 | 杨峥雄 | Mechanical dynamic extrusion machine |
| CN101077611A (en) * | 2007-05-31 | 2007-11-28 | 华南理工大学 | Pulse type shock processing on-line compound injection molding method and its equipment |
| CN101980849A (en) * | 2008-03-31 | 2011-02-23 | 东洋机械金属株式会社 | Inline screw type injection molding machine and method of controlling the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4276754B2 (en) * | 1999-11-11 | 2009-06-10 | 株式会社日本製鋼所 | Thermoplastic resin foam molding method |
-
2021
- 2021-06-30 CN CN202110745144.XA patent/CN113601784B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1141842A (en) * | 1996-07-05 | 1997-02-05 | 华南理工大学 | Electromagnetic polymer dynamic injection forming method and apparatus thereof |
| CN1663771A (en) * | 2005-03-08 | 2005-09-07 | 华南理工大学 | Injector screw axial pulse displacement method and apparatus |
| CN200967270Y (en) * | 2006-04-25 | 2007-10-31 | 杨峥雄 | Mechanical dynamic extrusion machine |
| CN1974173A (en) * | 2006-12-07 | 2007-06-06 | 华南理工大学 | Electrically driven reverse mold moving and pulse pressure inducing injection molding process and apparatus |
| CN101077611A (en) * | 2007-05-31 | 2007-11-28 | 华南理工大学 | Pulse type shock processing on-line compound injection molding method and its equipment |
| CN101980849A (en) * | 2008-03-31 | 2011-02-23 | 东洋机械金属株式会社 | Inline screw type injection molding machine and method of controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113601784A (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1171715C (en) | Mold clamping device and method for controlling operation of the same | |
| EP1102669B2 (en) | Two-stage electric injection unit and method for supplying plastic melt to an injection mold cavity | |
| CN1287969C (en) | Injection moulding machine control system and control method | |
| US6824374B1 (en) | Thermoplastic resin injection molding machine | |
| CN1206094C (en) | Energy efficient extruder drive | |
| CN107249850B (en) | Mold clamping device, molding device, and molding method | |
| MXPA05004411A (en) | Injection molding machine and controller. | |
| CN113601784B (en) | Asymmetric vibration injection method and system | |
| CN1853904A (en) | Control device for use in injection molding machine | |
| US6488490B1 (en) | Thermoplastic resin injection molding machine with the injecting unit including a rotary pump and torque limiter | |
| KR100567661B1 (en) | Rotation device for injection molding | |
| CN105235158A (en) | Rapid mold adjusting method and mold adjusting device for injection molding machine | |
| CN104972629B (en) | The control device of injection machine | |
| EP3116699B1 (en) | Control method for injection moulding | |
| CN216708152U (en) | Plastic injection molding equipment that heating efficiency is high | |
| CN100493893C (en) | Extrusion-die pressing precise forming method and apparatus therefor | |
| JP2010005840A (en) | Method of controlling injection molding machine and injection device for injection molding machine | |
| CN1547524A (en) | Resin molding machine | |
| CN113858529A (en) | Injection molding device for producing bottle caps and using method thereof | |
| CN113320088A (en) | Injection molding machine that air hole was got rid of in injection molding product forming system | |
| CN112388924A (en) | Rotating shaft type axial vibration excitation device and injection molding machine | |
| CN1190284C (en) | Gas auxiliary semi-solid substance shaper | |
| CN1184063C (en) | Method and device for injection moulding or pressing of plastic components | |
| CN218857618U (en) | Axial excitation device and injection molding machine | |
| CN212684879U (en) | Discharging system of paper buffer material manufacturing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |