CN114986785A - Intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products - Google Patents
Intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products Download PDFInfo
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- CN114986785A CN114986785A CN202210928152.2A CN202210928152A CN114986785A CN 114986785 A CN114986785 A CN 114986785A CN 202210928152 A CN202210928152 A CN 202210928152A CN 114986785 A CN114986785 A CN 114986785A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 157
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims description 41
- 239000007924 injection Substances 0.000 claims description 41
- 230000005484 gravity Effects 0.000 claims description 23
- 238000005192 partition Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 18
- 238000007599 discharging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
-
- 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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/76006—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/76056—Flow rate
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7613—Weight
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products, and relates to the technical field of injection molding, wherein the intelligent local gas-assisted injection molding method comprises a mold, a sprue, a runner, a material pipe, a cavity and data detection control equipment, wherein the inner walls of two sides of the mold are provided with the cavity, one side of the mold is provided with the runner, one side of the runner is provided with the sprue, one side of the mold is provided with a discharge channel, one end of the discharge channel penetrates through one side of the mold and is communicated with the cavity, and the other end of the discharge channel is provided with a flash well assembly; compared with the traditional mode of injecting quantitative plastic melt, the method can not control the position of an air cavity in the whole mold by adopting the mode that the nitrogen enters the inner cavity of the mold and the whole plastic melt fills the whole cavity.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products.
Background
In order to protect the environment, parts of tableware such as wooden chopsticks and the like in families are changed into non-toxic and harmless PP materials, the plastic tableware can be prepared without an injection molding device, and aiming at parts of plastic tableware for children, in order to reduce the quality of the whole plastic tableware, the tableware is prepared by adopting a gas-assisted injection molding method, so that the part of the whole tableware is in a hollow state, the weight of the tableware is reduced, the use of the children is facilitated, and the cost for preparing the tableware is also reduced; the prior gas-assisted injection molding method for the daily-used plastic is generally that only part of flowing plastic is injected into a mold during injection molding, so that the whole mold is not filled with plastic melt, meanwhile, the plastic melt entering the mold forms a solidified layer on the inner wall of the mold cavity, and at the moment, inert gas is introduced into the molten plastic, pushing the unsolidified plastic in the center into the unfilled mold cavity until the gas fills the whole mold cavity with the plastic melt, because of the existence of the principle of expansion with heat and contraction with cold, the surface of the plastic model solidified subsequently has the problems of shrinkage marks, deformation and the like, therefore, the plastic melt needs to carry out pressure maintaining treatment on the hollow air passage of the model when being condensed, under the pressure maintaining state, the gas in the gas passage compresses the melt, the material is supplemented to ensure the appearance of the product, and finally, before the mold is opened, gas is discharged from the interior of a workpiece, and demolding is carried out after the gas pressure is reduced to normal pressure; due to the presence of various forms of molds, the volume of plastic melt entering a new mold is measured in advance each time a new mold is subjected to gas-assisted injection molding, because: when the cavity of the mold is filled with plastic, the gas is difficult to form a cavity in the plastic, the position of the gas cavity is reserved only in the material shortage state, and after the gas is injected into the cavity, the default plastic is pushed by the expansion of the internal gas to fill the whole cavity, so that the material quantity is directly related to the molding effect of the gas-assisted process, and the error of the material metering precision of the plastic molding machine is related to the production stability of the gas-assisted process;
1. the adjustment of the gas-assisted process is more complicated, under the condition of not injecting gas, the product is filled and the flow state of the plastic and the state of the mold are observed, then the material quantity is gradually reduced, the distribution averageness of material flow of each sprue during material shortage is observed until the most appropriate plastic melt quantity is found, and the surface uniformity of the prepared mold is ensured; meanwhile, the size and the position of the hollow area of the model cannot be controlled by the gas-assisted process, and the weight ratio of the two ends of the model is realized by controlling the size and the position of the hollow area of the model according to the humanized requirements of some plastic products;
2. the gas-assisted injection molding comprises two types, namely external gas-assisted injection molding and nozzle injection molding, wherein the external gas-assisted injection molding is realized by arranging a gas needle on a mold, the gas needle is arranged at a certain specific position of the mold in a gas inlet mode, an exhaust device gas needle is arranged, after plastic is injected into a cavity, the gas needle is wrapped in the plastic, high-pressure gas is exhausted at the moment, the gas needle forms an extended closed space gas cavity in the plastic according to a gas channel and keeps certain pressure until the plastic is cooled, before the mold is opened, the gas in the gas cavity is exhausted out of the plastic through a control device by virtue of the gas needle, the nozzle injection molding is realized by using a special self-sealing type or active gas-assisted nozzle, after the plastic injection is finished, the high-pressure gas directly enters the plastic through the nozzle, the high-pressure gas and the gas-assisted injection nozzle are different only in gas injection positions, and the subsequent integral gas injection process is the same and needs pressure maintaining operation, therefore, as mentioned in an invention patent with the publication number of CN106273240B, the problems that when the existing equipment carries out gas-assisted pressure maintaining operation on a model inner cavity, the complexity of a gas injection time judging method and the gas injection time judging inaccuracy are solved, and external auxiliary forming equipment is prone to gas breakdown of a plastic part or cannot obviously eliminate sink marks are solved, but the operation method obtains a relatively accurate gas injection time point, a pressure sensor needs to be installed on the inner wall of a mold, so that the processing technology of the whole mold is increased, meanwhile, different model processing molds need to be installed, the practicability is relatively weak, and the actual production requirements are not met; therefore, an intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products are provided.
Disclosure of Invention
The invention aims to provide an intelligent local gas-assisted injection molding method and injection molding equipment for daily plastic products, which are used for solving the problems that the adjustment of a gas-assisted process provided in the background technology is more complicated, the judgment of the complexity of a gas injection time method and the gas injection time is inaccurate when the gas-assisted pressure maintaining operation is carried out on an inner cavity of a model, and an external auxiliary molding device is easy to cause gas to puncture a plastic part or can not obviously eliminate sink marks; in order to achieve the purpose, the invention provides the following technical scheme: the intelligent local gas auxiliary injection molding method for the daily plastic product comprises the following steps:
s1: collecting various data of model gas-assisted injection molding: an overflow well assembly is arranged at one end of a cavity of the die, one end of the whole overflow well assembly is communicated with one end of the cavity through a discharge channel, and an electric control valve is arranged on the whole discharge channel; the bottom of the whole overflow well assembly is provided with a gravity detection module of a gravity sensor, one end of a discharge channel positioned on one side of the overflow well assembly is provided with a flow velocity sensor, the whole gravity sensor collects the change data of the whole mass of the overflow well assembly in real time, the whole flow velocity sensor collects the flow velocity data of the plastic melt entering the discharge channel in the overflow well assembly in real time, and transmits the collected change data of the mass and the flow velocity data of the plastic melt to a data detection control device for processing; one side of the whole mould is provided with an active gas auxiliary injection nozzle, the joint of the active gas auxiliary injection nozzle and the cavity is provided with a second pressure sensor, the pressure change in the closed inner cavity of the whole mould is known in real time through the second pressure sensor, and the acquired pressure value is transmitted to the data detection control equipment in real time to be stored; the first pressure sensor on the whole discharge channel measures the numerical value change of the pressure borne by the plastic melt when the nitrogen is discharged from the inner cavity of the model through the first pressure sensor, and transmits the acquired pressure numerical value to the data detection control equipment for storage in real time; initial data acquisition: firstly, closing an electric control valve on a discharge channel, filling the whole cavity with a plastic melt from a pouring gate of a mold through injection molding equipment, injecting nitrogen into the whole cavity through an active gas auxiliary injection nozzle communicated with one side of the cavity, simultaneously controlling the opening of the electric control valve through data detection control equipment, and pushing the plastic melt which is not solidified at the other end into a flash well component along the discharge channel by gas; measuring the mass of the plastic melt entering the overflow well assembly through a gravity sensor in the overflow well assembly, and simultaneously measuring the flow rate of the plastic melt entering a discharge channel in the overflow well assembly through a flow rate sensor; the quality change data of the plastic melt in the whole flash well assembly and the flow speed data of the plastic melt on a discharge channel in the flash well assembly are transmitted into the data detection control equipment in real time, and the numerical value of the nitrogen pressure in the inner cavity of the whole model and the pressure value of the discharged plastic melt are also transmitted into the data detection control equipment; defining the time for gas to evacuate the plastic melt in the whole inner cavity of the model as T; defining the numerical value of the nitrogen pressure measured by the first pressure sensor when the inner cavity of the model is emptied as P; defining the data of the mass increasing rate of the plastic melt in the overflow well assembly as Zi, i is a natural number more than 1; defining the plastic melt flow rate change data at a fixed position on a discharge channel in the overflow well assembly as Li, wherein i is a natural number greater than 1; defining a pressure change value measured by a first pressure sensor in the discharge channel as Pi, wherein i is a natural number greater than 1; defining a pressure change value measured by a second pressure sensor 18 at the joint of the active air auxiliary nozzle and the cavity as pi, wherein i is a natural number greater than 1; defining the time variation value of the plastic melt with the gas exhausted from the whole model cavity as Ti, wherein i is a natural number more than 1; collecting working data: the method comprises the following steps that a worker starts to perform injection molding operation of a product model, plastic melt is filled into a whole cavity from a pouring gate through a material pipe, and nitrogen is injected into the whole cavity at regular time through an active gas-assisted injection nozzle communicated with one side of the cavity; measuring the mass of part of the plastic melt entering the overflow well assembly in unit time through a gravity sensor in the overflow well assembly, measuring the flow rate of the plastic melt entering a discharge channel in the overflow well assembly in unit time through a flow rate sensor, and measuring the pressure variation value of the inner cavity of the model in unit time through a second pressure sensor; defining the data of the plastic melt mass increase rate change in the overflow well assembly as zi, wherein i is a natural number greater than 1; defining the flow speed change data of the plastic melt on a discharge channel in the overflow well assembly as li, wherein i is a natural number greater than 1;
s2: establishing a mass velocity-time and flow velocity-time reference basis; in an initial state, respectively entering data detected by a gravity sensor, a flow velocity sensor, a first pressure sensor and a second pressure sensor into data detection control equipment, respectively establishing a mass velocity-time coordinate graph and a flow-time coordinate graph by using numerical values Zi and Li in unit time Ti, and dividing a time horizontal axis in the coordinate graph according to the same time interval; the whole data detection control equipment uniformly integrates and stores the numerical values of Zi, Li and pi in the time from 0 to Ti;
s3: comparing the working data with the initial data; injecting the plastic melt into the whole cavity from a pouring gate through a material pipe, injecting nitrogen into the whole cavity through an active gas auxiliary injection nozzle communicated with one side of the cavity, and selecting a specific injection molding time point T3 by a worker; when the gas injection time reaches T3, which is measured by a second pressure sensor in advance, the pressure value of the hollow cavity of the model is converted into the value measured by a first pressure sensor through the first pressure sensor in the discharge channel, the converted value measured by the first pressure sensor is defined as a measured value, and the measured value is compared with the p3 value at the T3 time point stored in the data detection control equipment; the measured value is more than p3, the whole data detection control equipment is required to control the gas-assisted pressure controller to reduce the pressure value of the gas subsequently entering the hollow cavity of the model; the measured value is less than p3, the whole data detection control equipment is required to control the gas-assisted pressure controller to increase the pressure value of the gas subsequently entering the hollow cavity of the model; when the gas injection time reaches T3, comparing the sum of the values of Z3 and L3 with the initial sum of the values of Z3 and L3 corresponding to a T3 time point stored in the data detection control equipment, summing Z3 and L3, and obtaining a comprehensive value A3 through summation; performing summation calculation on z3 and l3, and obtaining a comprehensive value a3 through the summation calculation; when A3 is more than a3, the pressure maintaining cooling is carried out, the temperature is gradually reduced, the condensation layer is gradually thickened, the strength is continuously increased, most of melt is cooled to be below the glass state temperature of the plastic, the gas with pressure injected from the outside has no substantial pushing effect on the cooled solidification layer, the gas pressure maintaining effect required by external auxiliary injection molding cannot be achieved, the pressure maintaining time of the whole cavity is required to be advanced, and the pressure value of the hollow cavity of the model is increased to p3 before the T3 time point; when A3 is less than a3, the pressure at the model air cavity is reduced, the transverse volume of the model air cavity is increased, the temperature of a cooling solidified layer is high, the thickness is relatively thin, the problem that the surface of a plastic part is uneven and even the plastic part is broken down due to the gas with pressure possibly occurs, and the pressure value of the hollow inner cavity of the model is increased to p3 after the T3 time point after the pressure maintaining time of the whole cavity is required to be delayed; when a3= a3, the model air chamber is now suitable for the pressure holding operation, and the peak value of the cavity pressure value in the model is p 3.
The injection molding equipment applied to the intelligent local gas-assisted injection molding method for the daily plastic products comprises a mold, a pouring gate, a flow channel, a material pipe, a cavity and data detection control equipment, wherein the cavity is formed in the inner walls of the two sides of the mold, the flow channel is formed in one side of the mold, the pouring gate is formed in one side of the flow channel, and the injection molding equipment is characterized in that: a discharge channel is arranged on one side of the mold, one end of the discharge channel penetrates through one side of the mold and is communicated with the cavity, and an overflow well assembly is arranged on the other end of the discharge channel; the flash well component comprises a shell, a partition plate, heating pipes and a plastic discharge pipe, wherein the partition plate is fixed in the shell through spot welding, the heating pipes are uniformly arranged on the opposite surfaces of the partition plate and the inner wall of the shell, the bottom of the shell is communicated with the plastic discharge pipe, and one end of the material discharge channel penetrates through one sides of the shell and the partition plate respectively and extends to one side of the partition plate; the discharging channel is located one end outside the shell and is provided with an electric control valve and a first pressure sensor respectively, the outer wall of one side of the shell is provided with a gravity sensor, and the joint of the discharging channel and the shell is provided with a flow velocity sensor.
Further, one side intercommunication of mould has active gas to assist and jets the mouth, and is located one end that active gas assists and jets the mouth and run through one side of mould and be linked together with the die cavity, the other end intercommunication that active gas assists and jets the mouth has communicating pipe, and the one end intercommunication that is located communicating pipe has gas to assist pressure controller, one side intercommunication that gas assists pressure controller has high-pressure nitrogen gas compressor, one side that active gas assists and jets the mouth is through the bolt fastening has second pressure sensor.
Furthermore, one end of the runner is located at one side of the mold and is provided with a one-way material blocking assembly, the one-way material blocking assembly comprises a metal block, a first clamping groove, a feeding hole, a second clamping groove, a spring, a supporting block and a semi-conical hole, the metal block is fixed at one side of the mold through spot welding, the second clamping groove is symmetrically formed in two sides of the metal block, the first clamping groove is formed in one side of the metal block, the feeding hole is formed in the inner wall of one side of the first clamping groove, the supporting block is connected in the first clamping groove in a sliding mode and is located at one side of the supporting block, the semi-conical hole is formed in the other side of the supporting block, the inner wall of one side of the metal block penetrates through the inner wall of one side of the metal block and extends into the second clamping groove, the inner wall of one side of the second clamping groove is fixed with the spring through a bolt, and one side of the spring is abutted to one side of the supporting block.
Furthermore, one side of the feed inlet is communicated with one side of the flow passage, and one side of the semi-conical hole is abutted to the feed inlet.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, after the whole mold cavity is filled with the plastic melt, nitrogen is injected into the inner cavity of the plastic mold through the active gas auxiliary injection nozzle, and the redundant plastic melt extruded by gas is uniformly recovered;
2. in the invention, nitrogen enters the inner cavity of the plastic model, plastic melt at the other end of the cavity is pushed into the shell from the discharge channel, the mass of the plastic melt discharged from the cavity, the flow rate of the plastic melt in the discharge channel, the pressure of the plastic melt in the discharge channel and the pressure of the nitrogen in the inner cavity of the plastic model are measured by the gravity sensor, the flow rate sensor, the first pressure sensor and the second pressure sensor on the active gas auxiliary injection nozzle on the whole flash well component, the pressure value of the nitrogen entering the inner cavity of the model in unit time is adjusted by real-time data monitoring of data detection control equipment, the problem that the surface of the plastic part is uneven and even the plastic part is punctured due to overlarge nitrogen pressure value in the inner cavity of the model is avoided, and the problem that the nitrogen pressure value in the inner cavity of the model cannot be used for normal pressure maintaining operation due to undersize nitrogen is avoided, causing sink marks on the surface of the plastic product;
3. according to the invention, the pressure value of the whole nitrogen entering the inner cavity of the mold is monitored in real time through the data detection control equipment, and meanwhile, parameters of various types of mold gas auxiliary injection molding are stored in the whole data detection control equipment, so that the manual operation of workers is simpler, and the whole efficiency of the whole daily plastic product gas auxiliary injection molding is improved.
Drawings
FIG. 1 is a schematic view of the connection of the whole structure of the intelligent local gas-assisted injection molding equipment for the daily plastic products;
FIG. 2 is a schematic view of the overall construction of the flash well assembly of the present invention;
FIG. 3 is a schematic cross-sectional view of a flash well assembly of the present invention;
FIG. 4 is an enlarged view of the structure at the point A;
FIG. 5 is a schematic view of the overall structure of the unidirectional material blocking assembly of the present invention;
FIG. 6 is a schematic cross-sectional view of the unidirectional blocking assembly of the present invention;
FIG. 7 is a graph of the rate of increase of the melt in the shell per unit time curve according to the present invention;
FIG. 8 is a graph of the velocity profile of the melt flowing through a fixed location in the discharge passage per unit time in accordance with the present invention;
FIG. 9 is a graphical representation of the rate of increase of melt in the housing per unit time versus the sum of the flow rates of the melt in the discharge channel in accordance with the present invention.
In the figure: 1. a mold; 2. a gate; 3. a cavity; 4. a discharge channel; 5. an electrically controlled valve; 6. a spill well assembly; 601. a housing; 602. a partition plate; 603. heating a tube; 604. arranging plastic pipes; 7. a gravity sensor; 8. a flow rate sensor; 9. a first pressure sensor; 10. a data detection control device; 11. an active gas-assisted nozzle; 12. a communicating pipe; 13. a gas-assisted pressure controller; 14. a high pressure nitrogen compressor; 15. a flow channel; 16. a material pipe; 17. a one-way material blocking component; 171. a metal block; 172. a first card slot; 173. a feed inlet; 174. a second card slot; 175. a spring; 176. a resisting block; 177. a semi-conical hole; 18. a second pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, the present invention provides a technical solution:
example 1:
when the traditional gas-assisted process is adjusted, the adjustment is usually performed according to the following sequence: under the condition of no gas injection, fully beating the product and observing the flowing state of the plastic and the state of the mould 1; gradually reducing the material quantity, observing the distribution average of the material flow of each sprue 2 during material shortage, and ensuring the material flow symmetry of the mold 1 as much as possible; and the gas-assisted process adjustment of the invention, install the well assembly of the flash 6 additionally on one side of the mould 1, the well assembly of the whole flash 6 can be dismantled on the mould 1 freely, the serviceability is higher, when needing to adjust, fill the whole mold cavity 3 with the plastic melt first, and then inject the nitrogen into the plastic melt through the active gas-assisted nozzle 11, the plastic melt located in one side of mould 1 is because of being promoted by nitrogen of the other side at this moment, cause some plastic melts to be pushed into the body 601 of one side of mould 1 by nitrogen and store, such gas-assisted process adjustment has the following advantages:
1. the plastic melt in the inner cavity of the mold flows, so that the pressure of the whole solidified plastic on the outer wall of the mold and the inner wall of the cavity 3 is increased, the residual internal stress of the product after demolding is reduced, the flexural deformation is relieved, and the strength of the product is improved;
2. the rough control of the size and the position of the air cavity in the whole model is realized by controlling the pressure value of the nitrogen entering the plastic melt, so that the later processing of the plastic product is facilitated, and the secondary processing of the plastic product is similar to drilling, cutting and the like;
3. the whole gas-assisted process is simple to adjust, the quality value of the plastic melt injected into the cavity 3 needs to be continuously tried when the traditional gas-assisted process is adjusted due to the diversification of the mold 1 during the whole injection molding until the optimal injection value of the plastic melt is found, the improved gas-assisted injection molding is carried out, the cavity 3 is filled with the improved gas-assisted injection molding at one time, and the gas injection pressure is subsequently adjusted, so that the whole gas-assisted process is simpler to adjust; during specific operation, a flash well component 6 for receiving nitrogen and extruding plastic melt needs to be additionally arranged on one side of the die 1, a discharge channel 4 is communicated with one side of the whole shell 601, as shown in fig. 2-3, an electric control valve 5 and a first pressure sensor 9 are installed on the whole discharge channel 4, a flow velocity sensor 8 is installed on one side of the housing 601 and the discharge channel 4, a data display module of a gravity sensor 7 is installed on one side of the top of the whole housing 601, a gravity detection module of the gravity sensor 7 is installed at the bottom of the whole housing 601, the whole gravity sensor 7 collects change data of the whole mass of the overflow well assembly 6 in real time, the whole flow velocity sensor 8 collects flow velocity data of plastic melt entering the discharge channel 4 in the overflow well assembly 6 in real time, and the first pressure sensor 9 on the discharge channel 4 collects pressure values of the plastic melt extruded into the housing 601 by nitrogen in real time; a partition plate 602 is additionally arranged in the whole shell 601, meanwhile, a heating pipe 603 is arranged on the opposite surface of the whole partition plate 602 and the shell 601, the whole plastic melt injected into the partition plate 602 is not easy to discharge after being cooled, the plastic extruded into the shell 601 is subjected to heat preservation operation through the heating pipe 603 on the partition plate 602, and the plastic melt is conveyed into injection molding equipment through a plastic discharge pipe 604 positioned at the bottom of the shell 601, so that the waste of the plastic is avoided; a high-pressure nitrogen compressor 14, an air-assisted pressure controller 13 and an active air-assisted injection nozzle 11 for injecting air are additionally arranged on the outer side of the mold 1, the whole air-assisted pressure controller 13 is arranged on an air outlet pipe of the high-pressure nitrogen compressor 14 and is used for controlling the pressure of nitrogen entering an inner cavity of the mold, after plastic injection is finished, high-pressure air directly enters the interior of the plastic by virtue of the injection nozzle, an extended closed space is formed according to an air passage, the air cavity keeps certain pressure until the air cavity is cooled, and before the mold 1 is opened, the injection nozzle is separated from a product material passage by force by virtue of the retreat of a seat platform, so that the air is discharged out of a product; the whole gas-assisted pressure controller 13 is communicated with the active gas-assisted injection nozzle 11 through a communicating pipe 12, meanwhile, a second pressure sensor 18 is arranged on the whole active gas-assisted injection nozzle 11, and the whole second pressure sensor 18 is used for collecting the pressure value of nitrogen in the inner cavity of the plastic mold 1 in real time; the whole electric control valve 5 and the gas-assisted pressure controller 13 are controlled by data detection control equipment 10 arranged outside, and meanwhile, the gravity sensor 7, the flow velocity sensor 8, the first pressure sensor 9 and the second pressure sensor 18 uniformly send acquired data to the data detection control equipment 10; when the data detection control device 10 needs to monitor the preparation of one type of plastic model in real time, initial data for preparing the plastic model needs to be stored in the whole data detection control device 10 in advance; during specific operation, firstly, the electric control valve 5 on the discharge channel 4 is closed, the plastic melt is filled in the whole cavity 3 from the sprue 2 of the mold 1 through injection molding equipment, nitrogen is injected into the whole cavity 3 through the active gas auxiliary injection nozzle 11 communicated with one side of the cavity 3 at the moment, meanwhile, the whole electric control valve 5 is opened through the data detection control equipment 10, the gas pushes the plastic melt which is not solidified at the other end into the flash well component 6 along the discharge channel 4, the first pressure sensor 9 is arranged on the discharge channel 4 and used for measuring the pressure value of the plastic when the partial plastic melt in the mold is completely discharged, the second pressure sensor 18 is arranged at the joint of the whole active gas auxiliary injection nozzle 11 and the cavity 3, the pressure change in the closed inner cavity of the whole mold 1 is known in real time through the second pressure sensor 18, and the data collected by the two pressure sensors are transmitted to the data detection control equipment 10 in real time for storage, the plastic melt quality change data in the whole flash well assembly 6 and the plastic melt flow rate data on the discharge channel 4 in the flash well assembly 6 are also transmitted into the data detection control device 10 in real time; defining the time for gas to evacuate the plastic melt in the whole inner cavity of the model as T; defining the numerical value of the nitrogen pressure when the model inner cavity is exhausted, which is measured by the first pressure sensor 9, as P; defining the plastic melt mass increase rate data in the flash well assembly 6 as Zi, i being a natural number greater than 1; defining the plastic melt flow rate variation data on the discharge channel 4 in the overflow well assembly 6 as Li, wherein i is a natural number greater than 1; defining a pressure change value measured by a first pressure sensor 9 in the discharge channel 4 as Pi, wherein i is a natural number greater than 1; defining a pressure change value measured by a second pressure sensor 18 at the joint of the active air auxiliary nozzle 11 and the cavity 3 as pi, wherein i is a natural number greater than 1; defining the time variation value of the plastic melt with the gas exhausted from the whole model cavity as Ti, wherein i is a natural number more than 1; the whole initial data is acquired after the injection molding equipment works for a period of time, so that the situation that the initial data acquired by the whole data detection control equipment 10 has no contrast due to large surface temperature change difference of the mold 1 when the whole injection molding equipment starts to work is avoided; collecting data during working, wherein during specific operation, a worker starts to perform injection molding operation on a product model, a plastic melt is filled in the whole cavity 3 from the pouring gate 2 through the material pipe 16, and nitrogen is injected into the whole cavity 3 at regular time through the active gas auxiliary injection nozzle 11 communicated with one side of the cavity 3; defining the plastic melt quality change data in the flash well component 6 as zi, i being a natural number more than 1; due to the increase of time, the cooling of the raw materials in the whole die, the mass of the plastic melt entering the shell 601 is gradually reduced, and the graph of the mass increase rate of the plastic melt in the whole shell 601 is shown in FIG. 7; defining the flow rate variation data of the plastic melt on a discharge channel 4 in the overflow well assembly 6 as li, wherein i is a natural number greater than 1; also, the cooling of the raw material inside the entire mold causes the flow rate of the plastic melt in the discharge channel 4 to gradually slow down, and the flow rate variation curve of the plastic melt in the entire discharge channel 4 is shown in fig. 8; in an initial state, data detected by the gravity sensor 7, the flow sensor, the first pressure sensor 9 and the second pressure sensor 18 respectively enter the data detection control device 10 for storage and processing, new data acquired by the gravity sensor 7 and the flow sensor in unit time are sent to the data detection control device 10, and the whole data detection control device 10 starts to compare, process and integrate the new data and the old data; suppose that a worker selects a specific injection molding time point T3, the data detection control device 10 starts to measure the gas injection time to the second sensor and reaches T3, the pressure value of the hollow inner cavity of the model is converted into the value measured by the first pressure sensor 9 in the discharge channel 4, the converted value measured by the first pressure sensor 9 is defined as a measured value, and the measured value is compared with the p3 value of the T3 time point stored in the data detection control device 10, so as to avoid that some gas is dissolved in the boundary layer between the melt and the gas due to the large pressure of the hollow inner cavity of the model, if the plastic is not completely solidified after the pressure holding is finished, the gas expands to form bubbles on the inner surface of the gas passage during pressure releasing, the gas pressure is larger during mold filling, the more gas is dissolved in the boundary layer of the melt, and the expansion effect of the gas is stronger after the pressure holding is finished, the pressure intensity of a hollow inner cavity of the model is small, so that the problem of shrinkage of a product after injection molding is easily solved; the measured value is more than p3, the whole data detection control device 10 is required to control the gas-assisted pressure controller 13 to reduce the pressure value of the gas subsequently entering the hollow cavity of the model; the measured value is less than p3, the whole data detection control device 10 is required to control the gas-assisted pressure controller 13 to increase the pressure value of the gas subsequently entering the hollow cavity of the model; when the gas injection time reaches T3, comparing the sum of the values of Z3 and L3 with the initial sum of the values of Z3 and L3 corresponding to the time point T3 stored in the data detection control device 10, and simultaneously, the data change curve of the initial sum of the values of Z3 and L3 is shown in FIG. 9; performing summation calculation on Z3 and L3, and obtaining a comprehensive value A3 through the summation calculation; performing summation calculation on z3 and l3, and obtaining a comprehensive value a3 through the summation calculation; when A3 is more than a3, the pressure maintaining cooling is carried out, the temperature is gradually reduced, the condensation layer is gradually thickened, the strength is continuously increased, most of melt is cooled to be below the glass state temperature of the plastic, the gas with pressure injected from the outside has no substantial pushing effect on the cooled solidification layer, the gas pressure maintaining effect required by external auxiliary injection molding cannot be achieved, the pressure maintaining time of the whole cavity 3 is required to be advanced, and the pressure value of the hollow inner cavity of the model is increased to p3 before the T3 time point; when A3 is less than a3, the pressure at the model air cavity is reduced, the transverse volume of the model air cavity is increased, the temperature of a cooling solidified layer is high, the thickness is relatively thin, the problem that the surface of a plastic part is uneven and even the plastic part is broken down due to the gas with pressure possibly occurs, and the pressure value of the hollow inner cavity of the model is increased to p3 after the T3 time point after the pressure maintaining time of the whole cavity 3 is required to be delayed; when A3= a3, the model air cavity is suitable for pressure maintaining operation, and the peak value of the pressure value of the hollow cavity of the model is p 3; the real-time data monitoring of the data detection control equipment 10 is adopted to adjust the pressure value of nitrogen entering the inner cavity of the model in unit time, so that the problem that the surface of the plastic part is uneven or even breaks through the plastic part due to overlarge nitrogen pressure value in the inner cavity of the model is avoided, and the problem that the surface of the plastic product is shrunk due to the fact that the normal pressure maintaining operation cannot be performed due to the fact that the nitrogen pressure value in the inner cavity of the model is too small is avoided;
example 2:
when injecting gas into the plastic melt in the cavity 3, the distance between the whole active gas-assisted injection nozzle 11 and the gate 2 is kept at 30mm, so that gas is prevented from reversely entering the gate 2 or the plastic melt is pushed into the injection molding equipment, and for this purpose, as shown in fig. 4, a one-way material blocking component 17 is fixed on the mold 1 on one side of the whole runner 15 and used for preventing the plastic melt from reversely flowing; during specific operation, the material pipe 16 on the whole injection molding device abuts against the two groups of abutting blocks 176 in the first clamping groove 172, the two abutting blocks 176 are symmetrically provided with semi-conical holes 177, when the material pipe 16 continuously enters the position of the feed port 173 on one side of the metal block 171, the material pipe 16 abuts against the two abutting blocks 176 at the moment, the abutting blocks 176 in the second clamping groove 174 continuously extrude the spring 175, plastic melt is injected into the flow channel 15 after the material pipe 16 contacts with the feed port 173, and after the material pipe 16 withdraws from the semi-conical holes 177, the spring 175 merges the two abutting blocks 176 at the moment and seals the feed port 173, so that backflow of the plastic melt is avoided.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims. In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The intelligent local gas-assisted injection molding method for the daily plastic products is characterized by comprising the following steps of: the intelligent local gas-assisted injection molding method for the daily plastic product comprises the following steps:
s1: collecting various data of model gas-assisted injection molding: an overflow well component (6) is arranged at one end of a cavity (3) of the die (1), one end of the whole overflow well component (6) is communicated with one end of the cavity (3) through a discharge channel (4), and an electric control valve (5) is arranged on the whole discharge channel (4); the gravity detection module of the gravity sensor (7) is installed at the bottom of the whole overflow well assembly (6), the flow velocity sensor (8) is installed at one end of the discharge channel (4) located on one side of the overflow well assembly (6), the whole gravity sensor (7) collects change data of the whole mass of the overflow well assembly (6) in real time, the whole flow velocity sensor (8) collects flow velocity data of plastic melts entering the discharge channel (4) in the overflow well assembly (6) in real time, and the collected change data of the mass and the flow velocity data of the plastic melts are transmitted to the data detection control device (10) to be processed; an active gas auxiliary injection nozzle is installed on one side of the whole mold (1), a second pressure sensor (18) is installed at the joint of the active gas auxiliary injection nozzle (11) and the cavity (3), the pressure change in the closed inner cavity of the whole mold (1) is known in real time through the second pressure sensor (18), and the acquired pressure value is transmitted to the data detection control equipment (10) in real time to be stored; a first pressure sensor (9) on the whole discharge channel (4) measures the numerical value change of the pressure borne by the plastic melt when the nitrogen is discharged in the inner cavity of the model through the first pressure sensor (9), and transmits the acquired pressure numerical value to the data detection control equipment (10) in real time for storage; initial data acquisition: firstly, an electric control valve (5) on a discharge channel (4) is closed, plastic melt is injected into a whole cavity (3) from a pouring gate (2) of a mold (1) through injection molding equipment, at the moment, nitrogen is injected into the whole cavity (3) through an active gas auxiliary injection nozzle (11) communicated with one side of the cavity (3), meanwhile, the data detection control equipment (10) controls the electric control valve (5) to be opened, and the gas pushes the plastic melt which is not solidified at the other end into a flash well component (6) along the discharge channel (4); the mass of the plastic melt entering the flash well assembly (6) is measured by a gravity sensor (7) in the flash well assembly (6), and the flow rate of the plastic melt entering the discharge channel (4) in the flash well assembly (6) is measured by a flow rate sensor (8); the quality change data of the plastic melt in the whole flash well assembly (6) and the flow speed data of the plastic melt on the discharge channel (4) in the flash well assembly (6) are transmitted into the data detection control device (10) in real time, and the numerical value of the nitrogen pressure in the inner cavity of the whole model and the pressure value of the discharged plastic melt are also transmitted into the data detection control device (10); defining the time for gas to evacuate the plastic melt in the whole inner cavity of the model as T; defining the numerical value of the nitrogen pressure when the inner cavity of the model is exhausted, which is measured by the first pressure sensor (9), as P; defining the plastic melt mass increase rate data in the overflow well assembly (6) as Zi, i being a natural number greater than 1; defining the plastic melt flow rate change data of a fixed position on a discharge channel (4) in the overflow well assembly (6) as Li, wherein i is a natural number greater than 1; defining the pressure change value measured by a first pressure sensor (9) in the discharge channel (4) as Pi, wherein i is a natural number (Pi is less than or equal to P) which is greater than 1; defining a pressure change value measured by a second pressure sensor 18 at the joint of the active air auxiliary nozzle (11) and the cavity (3) as pi, wherein i is a natural number greater than 1; defining the time change value of the plastic melt when the gas is exhausted from the whole inner cavity of the model as Ti, (Ti is less than or equal to T), wherein i is a natural number more than 1; collecting working data: the worker starts to perform injection molding operation of a product model, the whole cavity (3) is filled with plastic melt from the sprue (2) through the material pipe (16), and nitrogen is injected into the whole cavity (3) at regular time through the active gas auxiliary injection nozzle (11) communicated with one side of the cavity (3); the mass of a part of plastic melt entering the flash well assembly (6) in unit time is measured through a gravity sensor (7) in the flash well assembly (6), meanwhile, the flow velocity of the plastic melt entering a discharge channel (4) in the flash well assembly (6) in unit time is measured through a flow velocity sensor (8), and the pressure variation value of the inner cavity of the model in unit time is measured through a second pressure sensor (18); defining the data of the plastic melt mass increase rate change in the overflow well assembly (6) as zi, wherein i is a natural number greater than 1; defining the plastic melt flow rate variation data on a discharge channel (4) in the overflow well assembly (6) as li, wherein i is a natural number greater than 1;
s2: establishing a mass flow-time reference and a flow-time reference; in an initial state, data detected by a gravity sensor (7), a flow velocity sensor (8), a first pressure sensor (9) and a second pressure sensor (18) respectively enter data detection control equipment (10), a mass velocity-time coordinate graph and a flow rate-time coordinate graph are respectively established for the numerical values Zi and Li in unit time Ti, and time horizontal axes in the coordinate graphs are divided according to the same time interval; the whole data detection control device (10) integrates and stores numerical values of Zi, Li and pi uniformly in 0-Ti time;
s3: comparing the working data with the initial data; the plastic melt is filled into the whole cavity (3) from the sprue (2) through the material pipe (16), nitrogen is injected into the whole cavity (3) through the active gas auxiliary injection nozzle (11) communicated with one side of the cavity (3), and a specific injection time point T3 (T3 is less than T) is selected by a worker; when the gas injection time reaches T3, the pressure value of the hollow cavity of the model is measured in advance by a second pressure sensor (18), the pressure value of the hollow cavity of the model is converted into the value measured by a first pressure sensor (9) through the first pressure sensor (9) in the discharge channel (4), the converted value measured by the first pressure sensor (9) is defined as a measured value, and the measured value is compared with the p3 value at the T3 time point stored in the data detection control equipment (10); the measured value is more than p3, the whole data detection control equipment (10) is required to control the gas-assisted pressure controller (13) to reduce the pressure value of the gas subsequently entering the hollow cavity of the model; the measured value is less than p3, the whole data detection control equipment (10) is required to control the gas-assisted pressure controller (13) to increase the pressure value of the gas subsequently entering the hollow cavity of the model; when the gas injection time reaches T3, comparing the sum of the values of Z3 and L3 with the initial sum of the values of Z3 and L3 corresponding to the time point T3 stored in the data detection control equipment (10), summing Z3 and L3, and obtaining a comprehensive value A3 through summation; performing summation calculation on z3 and l3, and obtaining a comprehensive value a3 through the summation calculation; when A3 is more than a3, the pressure maintaining cooling is carried out, the temperature is gradually reduced, the condensation layer is gradually thickened, the strength is continuously increased, most of melt is cooled to be below the glass state temperature of the plastic, the gas with pressure injected from the outside has no substantial pushing effect on the cooled solidification layer, the gas pressure maintaining effect required by external auxiliary injection molding cannot be achieved, the pressure maintaining time of the whole cavity (3) is required to be advanced, and the pressure value of the hollow inner cavity of the model is increased to p3 before the T3 time point; when A3 is less than a3, the pressure at the model air cavity is reduced, the transverse volume of the model air cavity is increased, the temperature of a cooling solidified layer is higher, the thickness is relatively thin, the problem that the surface of a plastic part is uneven and even the plastic part is broken down due to the gas with pressure possibly occurs, the pressure maintaining time of the whole cavity (3) is required to be delayed, and the pressure value of the hollow inner cavity of the model is increased to p3 after the T3 time point; when a3= a3, the model air chamber is now suitable for the pressure holding operation, and the peak value of the cavity pressure value in the model is p 3.
2. Intelligent local gaseous supplementary injection moulding device of daily plastic products, including mould (1), runner (2), runner (15), material pipe (16), die cavity (3) and data detection controlgear (10), die cavity (3) have been seted up to the both sides inner wall of mould (1), and lie in one side of mould (1) and seted up runner (15), runner (2), its characterized in that have been seted up to one side of runner (15): a discharge channel (4) is installed on one side of the mold (1), one end of the discharge channel (4) penetrates through one side of the mold (1) and is communicated with the cavity (3), and an overflow well assembly (6) is installed on the other end of the discharge channel (4); the overflow well assembly (6) comprises a shell (601), a partition plate (602), heating pipes (603) and a plastic discharge pipe (604), wherein the partition plate (602) is fixed inside the shell (601) through spot welding, the heating pipes (603) are uniformly arranged on the opposite surfaces of the partition plate (602) and the inner wall of the shell (601), the bottom of the shell (601) is communicated with the plastic discharge pipe (604), and one end of a discharge channel (4) penetrates through one sides of the shell (601) and the partition plate (602) respectively and extends to one side of the partition plate (602); discharge channel (4) are located the outer one end of casing (601) and install automatically controlled valve (5) and first pressure sensor (9) respectively, gravity sensor (7) are installed to one side outer wall of casing (601), discharge channel (4) and casing (601) junction install velocity of flow sensor (8).
3. The intelligent local gas-assisted injection molding equipment for daily plastic products as claimed in claim 2, characterized in that: one side intercommunication of mould (1) has active gas to assist and penetrates mouth (11), and is located one end that active gas assists and penetrates mouth (11) and run through one side of mould (1) and be linked together with die cavity (3), the other end intercommunication that active gas assists and penetrates mouth (11) has communicating pipe (12), and the one end intercommunication that is located communicating pipe (12) has gas to assist pressure controller (13), one side intercommunication that pressure controller (13) were assisted to gas has high-pressure nitrogen compressor (14), one side that active gas assists and penetrates mouth (11) is fixed with second pressure sensor (18) through the bolt.
4. The intelligent daily plastic product local gas-assisted injection molding equipment according to claim 2, characterized in that: one end of the runner (15) and one side of the mold (1) are provided with a one-way material blocking component (17), the one-way material blocking component (17) comprises a metal block (171), a first clamping groove (172), a feed port (173), a second clamping groove (174), a spring (175), a resisting block (176) and a semi-conical hole (177), one end of the runner (15) and one side of the mold (1) are fixed with the metal block (171) through spot welding, the two sides of the metal block (171) are symmetrically provided with the second clamping groove (174), one side of the metal block (171) is provided with the first clamping groove (172), the inner wall of one side of the first clamping groove (172) is provided with the feed port (173), the first clamping groove (172) is connected with the resisting block (176) in a symmetrical and sliding manner, one side of the resisting block (176) is provided with the semi-conical hole (177), and the other side of the resisting block (176) penetrates through the inner wall of one side of the metal block (171) and extends into the second clamping groove (174), and a spring (175) is fixed on the inner wall of one side of the second clamping groove (174) through a bolt, and one side of the spring (175) is abutted against one side of the abutting block (176).
5. The intelligent daily plastic product local gas-assisted injection molding equipment according to claim 4, characterized in that: one side of the feed port (173) is communicated with one side of the flow channel (15), and one side of the semi-conical hole (177) is abutted against the feed port (173).
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