CN-122008503-A - Temperature control auxiliary demolding control method and system, intelligent terminal and storage medium

CN122008503ACN 122008503 ACN122008503 ACN 122008503ACN-122008503-A

Abstract

The application relates to a temperature control auxiliary demolding control method, a temperature control auxiliary demolding control system, an intelligent terminal and a storage medium, and relates to the technical field of injection molding; after the temperature of the fixed mold core is reduced by a preset time period, a cooling medium is introduced into the temperature control runner of the fixed mold core at a second rate, wherein the second rate is larger than the first rate, the injection mold is controlled to execute a mold opening action in response to a mold opening permission instruction, the injection mold is controlled to execute a demolding action, the driven mold core of the injection molding part is ejected, a heating medium is introduced into the temperature control runner of the fixed mold core in the process of executing the mold opening action and the demolding action so as to return the temperature of the fixed mold core, and the injection mold is controlled to execute the next injection molding operation after the temperature of the fixed mold core reaches the preset injection molding temperature. The application can reduce the probability of clamping stagnation or strain phenomenon in the process of separating the injection molding part from the mold cavity without setting the draft angle.

Inventors

PENG PINGPING
CHEN QIJIE
CEN LIFENG

Assignees

宁波四维尔工业有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260407

Claims (10)

1. The temperature control auxiliary demolding control method is characterized by comprising the following steps of: in response to an injection molding completion signal, introducing a cooling medium into a temperature control runner of the fixed mold core at a first speed to cool the fixed mold core, so that an injection molding piece is cooled; After the preset cooling time period, introducing a cooling medium into the temperature control runner of the fixed mold core at a second rate, so that the injection molding piece is cooled and contracted, wherein the second rate is greater than the first rate; Responding to the mold opening allowing instruction, controlling the injection mold to execute mold opening action, and separating the injection molding piece from the fixed mold core; controlling the injection mold to execute demolding action, and ejecting the injection molding piece out of the driven mold core; in the process of executing the demoulding action, introducing a heating medium into a temperature control runner of the fixed mould core so as to perform temperature return on the fixed mould core; After the temperature of the fixed mold core reaches the preset injection temperature, controlling the injection mold to execute the next injection molding operation.
2. The temperature-controlled auxiliary demolding control method according to claim 1, characterized in that the method comprises: acquiring current temperature data of a fixed mold core; Obtaining the predicted shrinkage of the injection molding piece according to the current temperature data and the material heat shrinkage parameters of the injection molding piece; calculating a predicted separation gap between the injection molding piece and the fixed mold core according to the predicted shrinkage and the cavity size parameter of the fixed mold core; comparing the predicted separation gap with a preset demolding gap threshold value to obtain an interface separation judgment result; when the interface separation judging result meets a preset demolding clearance threshold value, generating a mold opening allowing instruction; after generating a mold opening allowing instruction, introducing a heating medium into a temperature control runner of the fixed mold core; and continuously introducing a cooling medium into the temperature control runner of the fixed mold core when the mold opening allowing command is not generated.
3. The method of claim 1, wherein the temperature-controlled runners include a first runner in a draft area and a second runner in a non-draft area, the method further comprising: obtaining structural information of an injection molding piece, and determining a pattern drawing area and a non-pattern drawing area of the injection molding piece according to the structural information; obtaining the area ratio of the die drawing area to the non-die drawing area; Judging whether the area ratio is larger than a preset upper limit ratio or not; if not, acquiring the flow inlet ratio of the cooling medium into the temperature control flow channel according to the area ratio; the first regulating valve of the first flow channel and the second regulating valve of the second flow channel are regulated according to the flow inlet ratio; If yes, the first flow channel is regulated according to a preset flow regulating method.
4. The method of claim 3, wherein the first flow path includes a plurality of sub flow paths uniformly spaced along a depth direction of the cavity of the stationary mold core, and the adjusting the first flow path according to the preset flow adjustment method includes: Extracting thickness distribution data of the injection molding piece in the drawing area along the depth direction of the cavity according to the structural information of the injection molding piece; determining local volume parameters corresponding to each depth position according to the thickness distribution data; calculating the predicted shrinkage of each depth position according to the local volume parameter and the thermal shrinkage parameter of the injection molding material; Calculating shrinkage difference distribution of the injection molding part along the depth direction of the cavity according to the predicted shrinkage of each depth position; determining cooling compensation requirements of each depth position according to the shrinkage difference distribution; Matching the cooling compensation requirement of each depth position with the sub-runner corresponding to the depth position to obtain the target cooling adjustment parameter of each sub-runner; And adjusting the opening of the adjusting valve of each sub-runner according to the target cooling adjusting parameter to enable the cooling intensity along the depth direction of the cavity to be distributed in a gradient manner.
5. The temperature-controlled auxiliary demolding control method according to claim 4, characterized in that the method further comprises: Before the injection mold performs the mold opening action, introducing cold air flow into a cavity of the fixed mold core; after the cooling time of the cold air flow is preset, controlling the injection mold to execute the mold opening action; when the mold opening degree reaches a first preset mold opening degree, suspending the mold opening action to form a mold opening gap for discharging cold air flow between the fixed mold core and the movable mold core; Continuously introducing cold air flow into the cavity of the fixed mold core, and enabling the cold air flow to flow out of the mold opening gap after flowing through the surface of the injection molding piece; and responding to the injection molding piece meeting the preset mold opening condition, and recovering the mold opening action.
6. The temperature-controlled auxiliary demolding control method according to claim 5, characterized in that the method further comprises: acquiring an airflow distribution thermodynamic diagram at the die opening gap; Determining a region with the airflow outflow lower than a preset flow threshold according to the airflow distribution thermodynamic diagram, and defining the region as an airflow gap region; calculating the width ratio of the air flow gap area in the corresponding area of the integral die opening gap; Comparing the width duty ratio with a preset duty ratio threshold value; when the width ratio is not larger than a preset ratio threshold value, judging that the injection molding piece meets a preset mold opening condition; And when the width ratio is larger than a preset ratio threshold value, judging that the injection molding piece does not meet the preset mold opening condition.
7. The temperature-controlled auxiliary demolding control method according to claim 6, characterized in that the method further comprises: when the injection molding part does not meet the preset mold opening condition, determining the distribution side position of the air flow gap area according to the air flow distribution thermodynamic diagram; Performing region matching on the distribution side position and the sub-flow channel, and determining a target sub-flow channel corresponding to the distribution side position; the opening of the regulating valve corresponding to the target sub-runner is improved; reducing the temperature of the cold air flow and controlling the cold air flow to be introduced into the cavity of the fixed mold core in a pulse mode; And judging the preset mold opening conditions according to the airflow distribution thermodynamic diagram in real time until the injection molding part meets the preset mold opening conditions.
8. A temperature-controlled auxiliary demoulding control system for executing the temperature-controlled auxiliary demoulding control method as claimed in any one of claims 1 to 7, comprising: The acquisition module is used for acquiring the temperature of the fixed mold core; a memory for storing a program of the temperature control auxiliary demolding control method; And the processor is used for loading and executing the program in the memory by the processor and realizing the temperature control auxiliary demolding control method.
9. An intelligent terminal comprising a memory and a processor, wherein the memory has stored thereon a computer program that can be loaded by the processor and that performs the method according to any of claims 1 to 7.
10. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 1 to 7.

Description

Temperature control auxiliary demolding control method and system, intelligent terminal and storage medium Technical Field The application relates to the technical field of injection molding, in particular to a temperature control auxiliary demolding control method, a temperature control auxiliary demolding control system, an intelligent terminal and a storage medium. Background Injection molding is a molding process for injecting molten plastic into a mold cavity and forming a product with a preset shape after cooling and solidification, and has the advantages of high molding efficiency, good dimensional accuracy, suitability for mass production and the like, so that the injection molding is widely applied to the production process of various plastic products. Currently, in the field of injection molding, in order to achieve a smooth release of an injection molded part from a mold cavity, it is often necessary to adaptively design the structure of the article during the mold design stage. The side wall of the injection molding part or the surface of the corresponding cavity is provided with a certain draft angle, so that the injection molding part has a gradually enlarged demolding space in the mold opening direction, the friction resistance between the injection molding part and the cavity is reduced, and the phenomenon of clamping stagnation or strain in the demolding process is avoided. However, the mold release performance can be improved to some extent by providing the draft angle, but there is also a limit to the structural form of the injection molded article. For example, in some products with high requirements on structural dimensional accuracy or internal space utilization, the provision of draft causes the sidewall thickness of the product to change, causing the wall thickness of the product to assume a gradual change, thereby affecting the structural uniformity of the product. Meanwhile, due to uneven wall thickness, the material usage amount is easy to increase, and the production cost is further improved. Disclosure of Invention In order to reduce the probability of clamping stagnation or strain phenomenon in the process of separating an injection molding part from a mold cavity under the condition that the draft angle is not set, the application provides a temperature control auxiliary demolding control method, a temperature control auxiliary demolding control system, an intelligent terminal and a storage medium. In a first aspect, the application provides a temperature control auxiliary demolding control method, which adopts the following technical scheme: A temperature-controlled auxiliary demolding control method, comprising: in response to an injection molding completion signal, introducing a cooling medium into a temperature control runner of the fixed mold core at a first speed to cool the fixed mold core, so that an injection molding piece is cooled; After the preset cooling time period, introducing a cooling medium into the temperature control runner of the fixed mold core at a second rate, so that the injection molding piece is cooled and contracted, wherein the second rate is greater than the first rate; Responding to the mold opening allowing instruction, controlling the injection mold to execute mold opening action, and separating the injection molding piece from the fixed mold core; controlling the injection mold to execute demolding action, and ejecting the injection molding piece out of the driven mold core; in the process of executing the demoulding action, introducing a heating medium into a temperature control runner of the fixed mould core so as to perform temperature return on the fixed mould core; After the temperature of the fixed mold core reaches the preset injection temperature, controlling the injection mold to execute the next injection molding operation. By adopting the technical scheme, the cooling rate is increased in stages after injection molding is finished, so that the injection molding piece forms enough volume shrinkage under the condition of not setting draft angle, the packing degree and the fitting degree between the injection molding piece and the fixed mold core are actively reduced, the fixed mold core is subjected to temperature returning in the demolding process, the contact interface is converted from a low-temperature high-adhesion state to a relatively low-adhesion state, the separation resistance is reduced, the local adhesion and the stress concentration are avoided, and the probability of clamping stagnation or strain phenomenon in the separation process of the injection molding piece from the mold cavity is effectively reduced. Optionally, acquiring current temperature data of the fixed mold core; Obtaining the predicted shrinkage of the injection molding piece according to the current temperature data and the material heat shrinkage parameters of the injection molding piece; calculating a predicted separation gap between the injection moldi