CN-121980832-A - Runner balance and cooperative cooling molding simulation method and system for multi-characteristic injection molding

CN121980832ACN 121980832 ACN121980832 ACN 121980832ACN-121980832-A

Abstract

The invention discloses a runner balance and cooperative cooling molding simulation method and system for a multi-characteristic injection molding piece, and relates to the technical field of plastic molding, wherein the method comprises the steps of obtaining an injection molding simulation model based on hot runner data and cavity data; the method comprises the steps of obtaining multi-characteristic cooling parameters required by each characteristic by using an injection characteristic analysis method, realizing flow channel balance and cooperative cooling by using the multi-characteristic cooling parameters, and solving the problems that when the multi-characteristic injection molding is processed, uneven flow velocity of a melt in a plurality of cavities is caused by partial division of cavities or control of injection velocity of the melt, and the molding speed of the injection body is too poor, so that the molding efficiency of the multi-characteristic injection molding is affected.

Inventors

YANG RENGUI
Shi Lefang
LEI FAN

Assignees

深圳市佳信德科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The runner balance and cooperative cooling molding simulation method of the multi-characteristic injection molding piece is characterized by comprising the following steps of: Acquiring size data of a hot runner assembly in a production line of the multi-characteristic injection molding piece and size data of a cavity connected with the hot runner assembly through a distributor, and respectively marking the size data as hot runner data and cavity data; simulating filling of the melt in the cavity by using an injection molding characteristic analysis method based on an injection molding simulation model, and acquiring multi-characteristic cooling parameters of each characteristic requirement during simulation; When the multi-characteristic injection molding piece is produced, after the solution flows into the hot runner assembly, the runner balance and the cooperative cooling are carried out on the molding of the multi-characteristic injection molding piece in the cavity by using the multi-characteristic cooling parameters corresponding to the characteristic requirements based on the cavity distributed by the solution and the characteristic requirements of the multi-characteristic injection molding piece produced by the cavity.
2. The runner balancing and collaborative cooling molding simulation method of a multi-property injection molding according to claim 1, wherein obtaining size data of a hot runner assembly in a production line of the multi-property injection molding and size data of a cavity to which the hot runner assembly is connected through a dispenser and respectively recording the size data as the hot runner data and the cavity data comprises: Acquiring size data of a hot runner assembly for transporting a melt in a production line of the multi-characteristic injection molding piece, and recording the size data as hot runner data, wherein the size data comprises length data, width data and height data; marking the cavities connected by the hot runner component through the distributor in the production line of the multi-characteristic injection molding piece as injection molding cavities, and marking the injection molding cavities which are different from each other as injection molding cavities ZX 1 to injection molding cavities ZX n respectively, wherein n is the number of the cavities which are different from each other in the production line of the multi-characteristic injection molding piece, and n is less than or equal to the total number of the cavities in the production line of the multi-characteristic injection molding piece; And respectively acquiring the size data of each injection molding cavity and recording the size data as cavity data of the injection molding cavity.
3. The runner balancing and coordinated cooling molding simulation method of a multi-property injection molding of claim 2, wherein obtaining an injection molding simulation model using digital twinning based on hot runner data and cavity data comprises: For any injection molding cavity ZX m , acquiring size data of a distributor connecting a hot runner assembly with the injection molding cavity ZX m and recording the size data as connection data, wherein m is a positive integer which is less than or equal to n and is more than or equal to 1; And obtaining injection simulation models corresponding to all the injection molding cavities ZX.
4. The method for simulating runner balancing and collaborative cooling molding of a multi-property injection molding according to claim 3, wherein obtaining all the property requirements corresponding to the multi-property injection molding, simulating filling of a melt in a cavity by using an injection property analysis method based on an injection simulation model, and obtaining multi-property cooling parameters of each property requirement during simulation comprises: For any injection molding cavity ZX m , based on the characteristic requirements of the injection molding parts obtained by production in the process requirements of the multi-characteristic injection molding parts, obtaining injection molding parts with different characteristic requirements when the injection molding cavity ZX m is used for producing the injection molding parts, and respectively marking the injection molding parts as homotype specific parts TY 1 to homotype specific parts TY r ; analyzing the production process of all the homotype and heterology parts by using an injection molding characteristic analysis method based on an injection molding simulation model corresponding to the injection molding cavity ZX m , and acquiring characteristic cooling parameters of each homotype and heterology part based on an analysis result; and (3) marking the characteristic cooling parameters of all the molded parts with the same type as the multi-characteristic cooling parameters of the injection molding cavity ZX m , and obtaining the multi-characteristic cooling parameters of all the injection molding cavities.
5. The method for simulating runner balancing and collaborative cooling molding of a multi-property injection molding according to claim 4, wherein the method for analyzing injection properties comprises: Based on the characteristic requirements of the homotype and heterology parts, obtaining areas with different cooling requirements in the injection molding cavity when the melt is filled into the injection molding cavity and cooled to the injection molding part meeting the characteristic requirements of the homotype and heterology parts, and respectively marking the areas as cooling control areas LK 1 to LK p , wherein the cooling requirements comprise cooling strength and cooling time; All cooling control zones are marked in the injection simulation model of the injection mold cavity ZX m based on the position of each cooling control zone within the mold cavity.
6. The method for simulating runner balancing and collaborative cooling molding of a multi-property injection molding according to claim 5, wherein the method for analyzing injection properties further comprises: obtaining basic flow parameters, thermal performance parameters, PVT state parameters and phase change and solidification parameters of a melt in a production line of the multi-characteristic injection molding piece, and recording the parameters as simulation parameters of the melt; Based on the simulation parameters of the melt and the flow speed of the melt in the production line of the multi-characteristic injection molding piece, in an injection simulation model, simulating the process of filling the melt into an injection molding cavity through a hot runner assembly and a distributor, and recording the process of starting to enter the injection molding cavity until the melt fills the injection molding cavity as a melt filling process.
7. The method for simulating runner balancing and collaborative cooling molding of a multi-property injection molding according to claim 6, wherein the method for analyzing injection properties further comprises: acquiring an adjustable range of cooling intensity and an adjustable range of cooling speed when cooling a cavity in a production line of the multi-characteristic injection molding part, and respectively marking the adjustable range of cooling intensity and the adjustable range of cooling speed as an optional intensity range and an optional speed range; and executing a melt filling process by using the injection simulation model, randomly acquiring a value in an optional intensity range and an optional speed range for any cooling control area in the injection simulation model in the melt filling process, and respectively marking the value as Q1 and Q2, and executing cooling with the cooling intensity of Q1 and the cooling speed of Q2 for the cooling control area when the melt reaches the cooling control area until the melt completely fills the cooling control area.
8. The method for simulating runner balancing and collaborative cooling molding of a multi-property injection molding according to claim 7, wherein the method for analyzing injection properties further comprises: When the melt filling process is finished, comparing the characteristic requirements of the obtained injection molding piece and the homotype heteroplasmy piece, and when the characteristic requirements of the obtained injection molding piece and the homotype heteroplasmy piece are completely the same, recording the cooling strength and the cooling speed of all the cooling control areas in the melt filling process as characteristic cooling parameters of the homotype heteroplasmy piece; and when the characteristic requirements of the obtained injection molding piece and the homotype piece are not completely the same, re-executing the melt filling process until the characteristic cooling parameters of the homotype piece are obtained.
9. The method of claim 8, wherein when producing the multi-property injection molding, the step of balancing and co-cooling the molding of the multi-property injection molding in the cavity using the multi-property cooling parameters corresponding to the property requirements based on the cavity to which the solution is allocated and the property requirements of the multi-property injection molding produced from the cavity after the solution flows into the hot runner assembly comprises: when the multi-characteristic injection molding piece is produced, after the solution flows into the hot runner assembly, marking the cavity to which the solution is distributed as a real-time injection molding cavity; The cavity is a real-time injection molding cavity, and a homotypic part with the characteristic requirement of standard injection molding is marked as a target injection molding part; and cooling and controlling the real-time injection molding cavity after the melt enters the real-time injection molding cavity based on the characteristic cooling parameters of the target injection molding piece.
10. The runner balance and cooperative cooling molding simulation system of the multi-characteristic injection molding is used for realizing the runner balance and cooperative cooling molding simulation method of the multi-characteristic injection molding according to any one of claims 1-9, and is characterized by comprising a twin model building module, an injection characteristic analysis module and a time sequence cooling module; The twin model building module is used for acquiring the size data of the hot runner assembly in the production line of the multi-characteristic injection molding piece and the size data of the cavity connected with the hot runner assembly through the distributor and respectively recording the size data as hot runner data and cavity data; The injection molding characteristic analysis module is used for acquiring all characteristic requirements corresponding to the multi-characteristic injection molding piece, simulating filling of the melt in the cavity by using an injection molding characteristic analysis method based on an injection molding simulation model, and acquiring multi-characteristic cooling parameters of each characteristic requirement during simulation; The sequential cooling module is used for carrying out runner balance and cooperative cooling on the molding of the multi-characteristic injection molding in the cavity by using multi-characteristic cooling parameters corresponding to the characteristic requirements based on the cavity distributed by the solution and the characteristic requirements of the multi-characteristic injection molding produced by the cavity after the solution flows into the hot runner assembly when the multi-characteristic injection molding is produced.

Description

Runner balance and cooperative cooling molding simulation method and system for multi-characteristic injection molding Technical Field The invention relates to the technical field of plastic molding, in particular to a runner balancing and collaborative cooling molding simulation method and system for a multi-characteristic injection molding. Background The multi-characteristic injection molding ‌ is an injection molding product which integrates various materials, colors or functional characteristics into a single plastic product through a special injection molding process, can realize the diversification of appearance, such as bicolor and multi-material touch, can also have the composite properties of structural strength, sealing property, chemical resistance and the like, and is widely applied to the fields of automobiles, electronics, medical treatment and the like, and the characteristics of the multi-characteristic injection molding include material compounding, structural unification, appearance refinement and the like. The existing method for the flow channel balance and cooperative cooling forming of the multi-characteristic injection molding part is characterized in that after an injection molding part model is divided, the Reynolds number corresponding to melt flowing in a cooling flow channel is analyzed, the Reynolds number is taken as an input end, the warping amount is taken as an output end, a neural network is built, and then the neural network is trained to obtain the expected Reynolds number, so that the warping of the injection molding part is optimized, although the improved method can obtain the Reynolds number corresponding to the condition that the warping amount is minimum, so that the optimization of the cooling process of the injection molding part is realized, the speed of melt injection into a cavity is influenced after the Reynolds number is determined, and the characteristics of the injection molding part cannot be effectively controlled, so that when the types of the injection molding part are more, the flow channel balance and cooperative cooling of the melt in the injection molding part can be ensured, the forming speed of the injection molding part is too great, and the problem of the molding efficiency of the multi-characteristic injection molding part is influenced, for example, in the patent application with the publication number of CN118656924A, the warping optimization method of the injection molding part based on the cooling flow channel number is disclosed, the cooling flow channel limit value is predicted by building the cooling flow channel, the cooling flow channel limit value is small, and the cooling flow channel limit value is predicted, and the cooling flow channel limit value is realized; however, other improvements of the runner balancing and cooperative cooling molding methods for multi-characteristic injection molding parts, usually in terms of the mold, still have the problem that when facing the multi-characteristic injection molding part, in order to ensure runner balancing and cooperative cooling of the injection molding part, uneven melt flow rate in the multi-cavity body is caused by locally dividing the cavity body or controlling the injection speed of the melt, the molding speed of the injection molding body is too poor, and the molding efficiency of the multi-characteristic injection molding body is affected, in view of this, there is a need for improvements in the existing runner balancing and synergistic cooling molding methods for multi-property injection molded articles. Disclosure of Invention The invention aims to solve at least one of the technical problems in the prior art to a certain extent, and aims to solve the problems that in the conventional runner balance and cooperative cooling forming method of the multi-characteristic injection molding, when the runner balance and cooperative cooling of the multi-characteristic injection molding are carried out, uneven flow velocity of a melt in a plurality of cavities, overlarge forming speed of the injection molding and influence on forming efficiency of the multi-characteristic injection molding are caused by locally dividing the cavities or controlling the injection speed of the melt. In order to achieve the above object, in a first aspect, the present application provides a method for simulating runner balancing and collaborative cooling molding of a multi-characteristic injection molding, comprising the steps of: Acquiring size data of a hot runner assembly in a production line of the multi-characteristic injection molding piece and size data of a cavity connected with the hot runner assembly through a distributor, and respectively marking the size data as hot runner data and cavity data; simulating filling of the melt in the cavity by using an injection molding characteristic analysis method based on an injection molding simulation model, and acquiring multi-characteristic cooling parame