Method for adjusting injection molding machine based on injection molding part defects and injection molding machine cleaning structure

Abstract

This invention discloses a method for adjusting an injection molding machine based on defects in injection molded parts, comprising the following steps: collecting defect information of injection molded parts, including visual features of the defects; classifying the causes of injection molded part defects into three major categories: mold problems, injection molding machine equipment problems, and injection molding machine parameter problems; sorting and verifying the causes of the three major categories based on the defect information to determine the target cause category corresponding to the defect; refining the target cause category to obtain multiple candidate causes; calling previous production data and screening out invalid candidate causes based on the previous production data; performing variable verification on the remaining candidate causes to determine the final set of causes; based on the final set of causes, formulating an injection molding machine adjustment plan to solve the problem of the injection molding machine producing defective injection molded parts; and storing the defect information, the final set of causes, and the corresponding adjustment plan together to form an adjustment template, establishing an adjustment template library to avoid the problems of traditional adjustments relying on manual experience and the inability to effectively reuse templates.

Description

Technical Field

[0001] This invention relates to a method for adjusting an injection molding machine based on defects in injection molded parts and a cleaning structure for the injection molding machine. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The production process is easily affected by many factors such as mold, equipment, and parameters, leading to defects such as shrinkage marks and flash, resulting in poor quality of the injection molded parts. These defects are generally determined by manual experience, requiring manual testing and adjustments of the injection molding machine until the defects are eliminated. This not only demands a high level of technical skill from the process engineer but also presents challenges due to the inability to effectively reuse experience, making adjustments difficult to implement. Summary of the Invention

[0003] In view of the shortcomings of the prior art, this application provides a method for adjusting the injection molding machine based on defects in injection molded parts. This method can solve the problem of relying on manual experience to judge the cause of defects in traditional injection molding machines. It also provides an injection molding machine cleaning structure. The cleaning structure is designed to clean the screw inside the injection unit barrel of the injection molding machine to prevent the injection molded parts from being defective due to impurities on the screw.

[0004] To achieve the above objectives, this application provides a method for adjusting an injection molding machine based on defects in injection molded parts, comprising the following steps:

[0005] ① Collect defect information of injection molded parts, including visual features of defects;

[0006] ② The causes of defects in injection molded parts are divided into three main categories: mold problems, injection molding machine equipment problems, and injection molding machine parameter problems. Based on the defect information, the three categories of causes are sorted, verified, and eliminated to determine the target cause category corresponding to the defect.

[0007] ③ The target cause category is refined to obtain multiple candidate causes. Previous production data is called and invalid candidate causes are screened out based on the production data. The remaining candidate causes are verified by variables to determine the final set of causes.

[0008] ④ Based on the final set of causes, develop an adjustment plan for the injection molding machine to solve the problem of defective injection molded parts produced by the injection molding machine;

[0009] ⑤. Link and store the defect information, the final cause set and the corresponding adjustment plan to form an adjustment template and establish an adjustment template library. When the defect information of the injection molded part is collected again, match it with the defect information in the adjustment template library, retrieve the adjustment template with the highest matching degree, and perform the injection molding machine adjustment production verification according to the adjustment plan in the adjustment template. If the verification does not completely eliminate the defect, repeat steps ②-⑤.

[0010] Furthermore, the visual features of the defects include the defect location, shape, size, color differences, and distribution characteristics.

[0011] Furthermore, step ② sorts and verifies the exclusions, including...

[0012] The three major causes are sorted by ease of use. While keeping two of the causes unchanged, the controllable variables corresponding to the other major cause are adjusted to produce injection molded parts. If the defects still exist in the injection molded parts, the major cause is determined to be a non-target major cause and is excluded. If the defects in the injection molded parts are eliminated or improved, the major cause is determined to be a target major cause.

[0013] Furthermore, the three main causes in step ③ are further detailed:

[0014] The mold problems mentioned include defects in the cavity structure, deviations in the gate and runner, insufficient parting surface accuracy, design defects in the venting groove, mold wear, and mold installation deviations.

[0015] The specific problems with the injection molding machine include barrel and screw assembly failures, mold clamping mechanism malfunctions, injection system leaks, cooling and heating system failures, lubrication system failures, and incomplete equipment cleaning.

[0016] The detailed problems with the injection molding machine parameters include deviations in holding pressure and time parameters, injection speed, abnormal pressure parameters, unreasonable barrel temperature zone parameters, deviations in cooling water temperature parameters, and incorrect settings of injection volume parameters.

[0017] Furthermore, the screening process in step ③ includes...

[0018] Extract historical data consistent with defect information, compare candidate causes with valid causes in historical data, eliminate candidate causes in historical data that have been verified not to cause this type of defect, and then combine production data, including daily defect handling records, equipment operation logins, mold maintenance records and parameter adjustment history records, to eliminate candidate causes that contradict the production data. Perform correlation verification on the remaining candidate causes. If multiple candidate causes have a causal relationship, retain all related candidate causes to form a final set of causes containing one or more candidate causes.

[0019] Furthermore, the rules for adjusting the injection molding scheme are as follows:

[0020] When one or more candidate causes in the final cause set are all one of the three major cause categories, the adjustment plan is to replace the mold, replace the equipment parts, clean the equipment, or adjust the parameters.

[0021] When multiple candidate causes in the final set of causes belong to at least two of the three major cause categories, the adjustment plan is divided into multiple sub-plans based on the cause category. The sub-plans are implemented from low to high difficulty or simultaneously.

[0022] Furthermore, if the defect in step ⑤ is not eliminated, when steps ②-⑤ are repeated, the corresponding final cause in the called adjustment template will be used as an exclusion item to exclude the cause of invalid historical verification and retain the cause corresponding to the defect that has not been safely improved.

[0023] This application also provides a barrel cleaning structure for an injection molding machine, used for cleaning the screw. The barrel includes an inner barrel and an outer barrel arranged coaxially, forming a cavity between the inner and outer barrels. A spiral water storage pipe is wound around the outer periphery of the inner barrel facing the heating component. The heating component heats the water in the water storage pipe. An arc-shaped groove is provided on the inner wall of the inner barrel, and a water spray component is slidably connected to the arc-shaped groove. The water spray component is connected to the water storage pipe through a hose. Each water spray component is equipped with a traction part, and the traction part is equipped with a drive component. The drive component activates the traction part, causing the water spray component to move to both ends of the arc-shaped groove, so that the water spray is exposed to spray and wash the screw surface.

[0024] Furthermore, the bottom of the arc-shaped groove is inclined and has a waist-shaped through groove, which forms a flow channel. The chamber is unidirectionally inclined and has a drain outlet at the end. The side wall of the arc-shaped groove is provided with a guide groove for the water spray component to slide and connect.

[0025] Furthermore, the water spray component includes symmetrically arranged arc-shaped I-beams. The side walls of the arc-shaped I-beams are provided with multiple spray holes with different spray angles. The arc-shaped I-beams are provided with sliders corresponding to the guide grooves and extension ends corresponding to the waist-shaped through grooves. The extension ends are connected to the traction unit. The traction unit includes a traction rope and a take-up roller. The take-up roller is installed on the outer wall of the inner cylinder through a connecting frame. The take-up roller is equipped with a driving component. The driving component rotates the take-up roller to realize the winding of the traction rope and realize the movement of the water spray component. Beneficial effects

[0026] The adjustment method of this application enables precise location and efficient handling of defect causes. By classifying and verifying data and screening, it reduces trial and error of invalid causes, shortens the machine adjustment cycle, and improves product quality.

[0027] This application addresses the problem of defects in injection molded parts caused by uncleaned screws inside the injection molding machine barrel. It introduces a barrel cleaning structure that eliminates the need to disassemble the equipment and achieves screw cleaning through a movable water spray component and a multi-angle spray design. Attached Figure Description

[0028] Figure 1 This is a flowchart illustrating the method.

[0029] Figure 2 This is a schematic diagram of the side cross-section of the injection molding machine barrel;

[0030] Figure 3 This is a front sectional view of the inside of the injection molding machine barrel;

[0031] Figure 4 A front sectional view of the inside of the water spray unit's starter cylinder;

[0032] Figure 5 A schematic diagram of an arc-shaped I-beam;

[0033] Figure 6 This is a partially enlarged schematic diagram of the inner cylinder;

[0034] Figure 7 This is a schematic diagram of a take-up roller.

[0035] Reference numerals: 1. Inner cylinder; 2. Outer cylinder; 3. Chamber; 4. Water pipe; 5. Heating component; 6. Water spray component; 6-1. Arc-shaped I-beam plate; 6-2. Spray hole; 6-3. Slider; 6-4. Extension end; 7. Hose; 8. Drive component; 9. Arc-shaped groove; 10. Waist-shaped through groove; 11. Traction part; 11-1. Take-up roller; 11-2. Traction rope. Detailed Implementation

[0036] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0037] For reference Figure 1 As shown in Embodiment 1 of this application, a method for adjusting an injection molding machine based on defects in injection molded parts is provided, including the following steps: collecting defect information of injection molded parts, including visual features of defects; classifying the causes of defects in injection molded parts into three major categories: mold problems, injection molding machine equipment problems, and injection and parameter problems; sorting and verifying the three major categories of causes based on the defect information to determine the target cause category corresponding to the defect; refining the target cause category to obtain multiple candidate causes; calling previous production data and screening out invalid candidate causes based on the previous production data; performing variable verification on the remaining candidate causes to determine the final set of causes; based on the final set of causes, formulating an injection molding machine adjustment plan to eliminate the problem of defective injection molded parts produced by the injection molding machine; associating and storing the defect information, the final set of causes, and the corresponding adjustment plan to form an adjustment template; establishing an adjustment template library; when injection molding defect information is collected again, matching the similarity with the defect information in the adjustment template library; retrieving the adjustment template with the highest matching degree; executing the injection molding machine adjustment production verification according to the adjustment plan in the adjustment template; if the verification does not completely eliminate the defect, repeating the above steps.

[0038] Specifically, injection molding defects include white spots, black spots, black streaks, cold slug spots, flash, insufficient glue, delamination, warpage, weld lines, trapped air, and color difference. Defect information on injection molded parts is collected using an industrial camera. This information includes visual characteristics of the defects, such as location, shape, size, color differences, and distribution. A recognition model is constructed to identify and determine the defect type, and the location, phase, size, color differences, and distribution characteristics of the defects are recorded. The recognition model is existing technology and will not be elaborated upon here.

[0039] The causes of defects in injection molded parts are categorized into three main types: mold problems, injection molding machine equipment problems, and injection molding machine parameter problems. These three types are ranked according to their ease of use. While keeping two types of causes unchanged, the controllable variables corresponding to the third type are adjusted during injection molding. If the defects persist, the affected type is considered a non-target cause and eliminated. If the defects are eliminated or improved, the affected type is considered a target cause. The target cause type is then refined to generate multiple candidate causes. Mold problems are further refined to include cavity structure defects, gate runner deviations, insufficient parting surface accuracy, venting groove design defects, mold wear, and mold installation deviations. Injection molding machine equipment problems are refined to include barrel and screw assembly failures, clamping mechanism abnormalities, injection system leaks, cooling and heating system failures, lubrication system failures, and incomplete equipment cleaning. Injection molding machine parameter problems are refined to include deviations in holding pressure and time parameters, abnormal injection speed and pressure parameters, unreasonable barrel temperature parameters, cooling water temperature parameter deviations, and incorrect injection volume parameter settings. As shown in Table 1 below:

[0040] Table 1. Detailed Cause Analysis - Defect Correspondence Table

[0041]

[0042] Because there are many detailed issues, and testing each one would take a long time, it is necessary to screen out some causes. The screening process includes extracting historical data with consistent defect information, comparing candidate causes with valid causes in historical data, eliminating candidate causes in historical data that have been verified not to cause this type of defect, and then combining production data, including daily defect handling records, equipment operation logs, mold maintenance records, and parameter adjustment history records, to eliminate candidate causes that contradict the production data. The remaining candidate causes are then subjected to correlation verification. If there is a causal relationship between the candidate causes, all related candidate causes are retained to form a final set of causes for one or more candidate causes.

[0043] Based on the final set of causes, an adjustment plan for the injection molding machine is formulated. The rules for the adjustment plan include: when all candidate causes in the final set of causes are one of the three major cause categories, the adjustment plan is one of mold replacement, equipment parts replacement, equipment cleaning, or parameter adjustment; when the candidate causes in the final set of causes belong to at least two of the three major cause categories, the adjustment plan is divided into multiple sub-plans based on the cause categories, and the sub-plans are implemented from low to high difficulty or simultaneously.

[0044] Case: Flash defects that occur in injection molding production. The defects are characterized by excess plastic overflow with a width of 0.1-0.5mm at the edges of the decorative panel and the parting surface. The overflow is distributed continuously or intermittently, affecting assembly accuracy and appearance quality. The production equipment is a vertical injection molding machine, and the processing material is PP + glass fiber reinforced material.

[0045] Step ①: Accurate collection of defect information

[0046] A 3D laser scanner combined with an industrial camera is used to perform a comprehensive scan and photograph of the injection molded parts coming off the production line, covering all edges and parting surfaces of the decorative panels. Then, an image analysis system automatically extracts the core defect information, including: Defect location: concentrated on the mold parting surface, edges near the gate, and snap-fit ​​connections; Morphology: thin, flake-like overflow with irregular edges, some appearing torn; Dimensions: width 0.1-0.5mm, length 5-20mm, average width 0.3mm; Color difference: consistent with the base material, with no significant color deviation; Distribution characteristics: cumulative defect length per part 15-30mm, with defects accounting for 70% at the parting surface. Finally, the 3D scan data of the defects, visual feature parameters, production batch, and injection molding machine number are associated and stored in the production database.

[0047] Step 2: Sorting and Verifying / Eliminating Major Causal Categories

[0048] The causes are categorized by ease of adjustment: First, injection molding machine parameter issues, which can be adjusted via the control panel; second, injection molding machine equipment issues, some parts of which can be quickly checked; and finally, mold issues, which require disassembly and repair, taking the longest time. Verification and troubleshooting should be performed according to this order:

[0049] Keeping the mold and equipment in the same condition, the core parameters were adjusted: the clamping pressure was increased from 120MPa to 140MPa, and the injection speed was reduced from 50mm / s to 35mm / s. Six molded products were produced, and the flash defects were significantly improved. The injection molding machine parameter problem was initially identified as the target cause category.

[0050] Keeping the parameters (after adjustment) and equipment unchanged, we replaced the spare mold (a new mold of the same model) and produced 6 molded products. There were no flash defects, which further confirmed that the problem was not related to the mold.

[0051] Keeping the parameters (after adjustment) and mold unchanged, check the equipment's mold locking mechanism. The guide pillars and tie rods are not loose, and the pressure of the mold locking cylinder is stable. Produce 6 molded products. There is no rebound of defects, thus ruling out problems with the injection molding machine.

[0052] Conclusion: The main cause of the problem is related to the parameters of the injection molding machine.

[0053] Step 3: Refinement and Validation of Candidate Causes

[0054] The candidate causes were refined based on broad parameter categories, including low clamping pressure, excessively fast injection speed, abnormal holding pressure, unreasonable barrel temperature zoning, and incorrect injection volume settings. Invalid causes were then eliminated. Historical data was reviewed, and records of flash defect handling for the same machine model and material over the past six months were extracted. Of these, 15 causes involved "low clamping pressure" and "excessively fast injection speed," and 3 involved "excessively high holding pressure." "Incorrect injection volume settings" were excluded, as there were no related historical records.

[0055] Based on production data: the equipment parameter adjustment history shows that when producing softer materials in the previous batch, the clamping pressure was lowered to 120MPa and the injection speed was increased to 50mm / s, and it was not adjusted back in time; the barrel temperature zone parameters, 180℃ in the front section, 175℃ in the middle section, and 170℃ in the rear section, meet the processing standards for PP+glass fiber materials, thus ruling out "unreasonable barrel temperature zone parameters".

[0056] Correlation verification: The remaining candidate causes "low clamping pressure" and "excessive injection speed" have a synergistic effect. When the clamping force is insufficient, high-speed injection is prone to melt overflow. The two are retained to form the final cause set: low clamping pressure parameter and excessive injection speed parameter.

[0057] Step 4: Adjusting the plan formulation and implementation

[0058] Adjustment Plan: Based on the final set of causes, develop targeted parameter adjustment plans. For single cause categories, directly implement parameter adjustments.

[0059] Mold clamping pressure: adjusted from 120MPa to 145MPa, further optimized from the initial adjustment to ensure tight mold clamping;

[0060] Injection speed: Adjust in segments from 50mm / s, 30mm / s in the front gate area, 40mm / s in the middle section, and 35mm / s in the rear section to avoid overflow caused by local high speed;

[0061] Auxiliary adjustment: The holding pressure is adjusted from 70MPa to 65MPa to reduce the risk of secondary overflow of molten material.

[0062] Execution and Verification: After setting the parameters according to the adjustment plan, 10 molds were produced continuously. 3D scanning inspection showed that 9 molds had no flash defects, and 1 mold only had a 0.03mm micro overflow at the edge of the buckle, which met the product tolerance requirements. The defect elimination rate reached 90%. After optimizing the injection speed segment parameters to 28mm / s for the first segment, 10 more molds were produced, and all of them had no flash defects.

[0063] Step 5: Template storage and reuse verification

[0064] Template creation: Associate and store the following information in the template library:

[0065] Defect information: Flash defect (located concentrated on the parting line / edge, thin sheet-like flash, size 0.1-0.5mm, color consistent with the substrate);

[0066] Ultimate cause: Injection molding machine parameter issues (low clamping pressure, excessive injection speed);

[0067] Adjustment plan: clamping pressure 145MPa, segmented injection speed 28mm / s for the front segment, 40mm / s for the middle segment, and 35mm / s for the rear segment, holding pressure 65MPa.

[0068] Reuse verification: Two weeks later, when the injection molding machine switched to produce the same type of automotive interior parts, a slight flash defect reappeared, with an overflow width of 0.1-0.2mm. The template with the highest matching similarity of 95% was retrieved from the template library, and the adjustment plan was directly implemented. After 15 consecutive molds were produced, there was no flash defect.

[0069] Secondary optimization: If a few defects still exist after reuse, the historical causes will be excluded. The focus will be on verifying "holding pressure" and "mold wear". Since there are no such issues this time, the template can be reused directly and is effective.

[0070] For reference Figures 2-7 As shown in Embodiment 2 of this application, a barrel cleaning structure for an injection molding machine is also provided. The barrel includes an inner barrel and an outer barrel arranged coaxially, forming a cavity between the inner barrel and the outer barrel. A spiral water storage pipe is wound around the heating component around the outer periphery of the inner barrel. The heating component heats the water in the water storage pipe. An arc-shaped groove is provided on the inner wall of the inner barrel, and a water spray component is slidably connected to the arc-shaped groove. The water spray component is connected to the water storage pipe through a hose. Each water spray component is equipped with a traction part, and the traction part is equipped with a driving component. The driving component activates the traction part, causing the water spray component to move to both ends of the arc-shaped groove, so that the water spray is exposed to spray and wash the screw surface.

[0071] The bottom of the arc-shaped groove is sloping and has a waist-shaped through groove, which forms a flow channel. The chamber is unidirectionally inclined and has a drain outlet at the end. The side wall of the arc-shaped groove is provided with a guide groove for the water spray component to slide and connect.

[0072] The water spray component includes symmetrically arranged arc-shaped I-beams. The side walls of the arc-shaped I-beams are provided with multiple spray holes at different spray angles. The arc-shaped I-beams are provided with sliders corresponding to the guide grooves and extension ends corresponding to the waist-shaped through grooves. The extension ends are connected to the traction unit. The traction unit includes a traction rope and a take-up roller. The take-up roller is installed on the outer wall of the inner cylinder through a connecting frame. The take-up roller is equipped with a driving component. The driving component rotates the take-up roller to realize the winding of the traction rope and realize the movement of the water spray component.

[0073] Specifically, see, for example Figures 2-7 As shown, this structure is based on the adjustment method to determine that the cause of the defective injection molded part is that the screw was not cleaned properly and there are residual impurities. The specific structure includes an inner cylinder and an outer cylinder arranged coaxially, forming a cavity between the inner cylinder and the outer cylinder. The outer cylinder can be formed by bolting together two symmetrically spliced ​​semi-circular plates. This design facilitates the maintenance and inspection of the cleaning components set in the inner cylinder. The inner wall of the inner cylinder has an arc-shaped groove with a sloping bottom, and the side wall has a guide groove for the sliding block of the water spray component to slide and connect. The bottom has a waist-shaped through groove, which forms a flow channel. The cavity has a drainage channel with a unidirectional slope and a drain outlet at the end. The water spray component is ensured to slide by the setting of guide grooves and sliders. The water spray component includes symmetrically arranged arc-shaped I-beams. The side walls of the arc-shaped I-beams are provided with multiple spray holes with different spray angles. When the injection molding machine is injecting normally, the arc-shaped I-beams are set in the arc-shaped grooves to form a complete surface, which will not affect the normal injection. This setting also protects the spray holes from blockage. To further ensure sealing, a sealing strip can be provided in the arc-shaped grooves. This is existing technology and is not shown in the attached drawings. Whether to configure the sealing strip depends on the actual situation. To enable the movement of the water spray component, a traction unit is configured, which is equipped with a drive component. The drive component is a rotating rod with gears. The traction unit includes a traction rope and a take-up roller. The take-up roller is installed on the outer wall of the inner cylinder through a connecting frame. The take-up roller has a gear groove in its center. The gear of the rotating rod meshes with the gear groove. The rotation of the rotating rod enables the take-up roller to wind up the traction rope. The traction rope pulls the water spray component to move along the guide slide, so that the spray hole is exposed. The pump body is started, and water in the water storage pipe is transported to the spray hole and sprayed out to spray and wash the screw.

Claims

1. A method of adjusting an injection molding machine based on defects of an injection molded part, the method comprising: Includes the following steps: ​ ① Collect defect information of injection molded parts, including visual features of defects; ② The causes of defects in injection molded parts are divided into three main categories: mold problems, injection molding machine equipment problems, and injection molding machine parameter problems. Based on the defect information, the three categories of causes are sorted, verified, and eliminated to determine the target cause category corresponding to the defect. ③ The target cause category is refined to obtain multiple candidate causes. Previous production data is called and the multiple candidate causes are screened out based on the previous production data. Invalid candidate causes are eliminated, and the remaining candidate causes are verified by variables to determine the final set of causes. The screening process includes: extracting historical data with consistent defect information, comparing candidate causes with valid causes in historical data, eliminating candidate causes in historical data that have been verified as not causing this type of defect, and then combining production data, including daily defect handling records, equipment operation logins, mold maintenance records, and parameter adjustment history records, to eliminate candidate causes that contradict the production data, verifying the correlation of the remaining candidate causes, and if multiple candidate causes have a causal relationship, retaining all related candidate causes to form a final set of causes containing one or more candidate causes; ④ Based on the final set of causes, develop an adjustment plan for the injection molding machine to solve the problem of defective injection molded parts produced by the injection molding machine; ⑤. Link and store the defect information, the final cause set and the corresponding adjustment plan to form an adjustment template and establish an adjustment template library. When the defect information of the injection molded part is collected again, match it with the defect information in the adjustment template library, retrieve the adjustment template with the highest matching degree, and perform the injection molding machine adjustment production verification according to the adjustment plan in the adjustment template. If the verification does not completely eliminate the defect, repeat steps ②-⑤.

2. The method of claim 1, wherein: The visual characteristics of the defects include the defect location, shape, size, color differences, and distribution characteristics.

3. The method of claim 2, wherein: Step ② Sorting and verifying exclusions includes: The three major causes are sorted by ease of use. While keeping two of the causes unchanged, the controllable variables corresponding to the other major cause are adjusted to produce injection molded parts. If the defects still exist in the injection molded parts, the major cause is determined to be a non-target major cause and is excluded. If the defects in the injection molded parts are eliminated or improved, the major cause is determined to be a target major cause.

4. The method of claim 3, wherein: Step ③ details the three main causes: The mold problems mentioned include defects in the cavity structure, deviations in the gate and runner, insufficient parting surface accuracy, design defects in the venting groove, mold wear, and mold installation deviations. The specific problems with the injection molding machine include barrel and screw assembly failures, mold clamping mechanism malfunctions, injection system leaks, cooling and heating system failures, lubrication system failures, and incomplete equipment cleaning. The detailed problems with the injection molding machine parameters include deviations in holding pressure and time parameters, injection speed, abnormal pressure parameters, unreasonable barrel temperature zone parameters, deviations in cooling water temperature parameters, and incorrect settings of injection volume parameters.

5. The method of claim 4, wherein: The rules for adjusting the injection molding scheme are as follows: When one or more candidate causes in the final cause set are all one of the three major cause categories, the adjustment plan is to replace the mold, replace the equipment parts, clean the equipment, or adjust the parameters. When multiple candidate causes in the final set of causes belong to at least two of the three major cause categories, the adjustment plan is divided into multiple sub-plans based on the cause category. The sub-plans are implemented from low to high difficulty or simultaneously.

6. The method for adjusting an injection molding machine based on defects in injection molded parts according to claim 5, characterized in that: If the defect is not eliminated in step ⑤, when repeating steps ②-⑤, the corresponding final cause in the called adjustment template will be used as an exclusion item to exclude the causes that were invalid in the historical verification, and retain the causes corresponding to the defects that were not fully improved.

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