Switching mold control method for two-plate hydraulic injection molding machine

Abstract

The application discloses a switch mode control method of a two-plate hydraulic injection molding machine, which detects and judges whether the actual positions of all corin columns are within the deviation range allowed for opening and closing the gate between closing the gate and closing the gate. When the condition is not met, the position of the corin column is adjusted, and the mold opening distance S2 of the corin column reset is also adjusted, so that the corin column is moved and reset according to the latest S2 subsequently. If the actual positions of all corin columns are still not within the deviation range allowed for opening and closing the gate after the subsequent mold opening is in place, the position of the corin column needs to be continuously adjusted until the opening condition is met, and then the whole cycle action is completed. The mold opening distance S2 of the corin column reset is automatically modified in this way, and after automatic adjustment for several times, the position of the corin column reset can be kept within the deviation range allowed for opening and closing the gate, so that the machine can directly close the gate without further adjusting the corin column during the closing process, and the practicability is good.

Description

Technical Field

[0001] This invention relates to a mold opening and closing control method for a two-platen hydraulic injection molding machine. Background Technology

[0002] The typical workflow of a two-platen hydraulic injection molding machine is as follows: ejector pin retraction → mold closing → gate adjustment → brake closing → high-pressure mold locking → injection (stage entry → injection → melt) → mold locking and pressure release → gate reset → brake opening → mold opening. Due to the unavoidable gap between the gate and the brake structure, coupled with gaps in the mold platen structure, the gate position is always outside the acceptable brake opening / closing deviation range after each high-pressure mold locking and pressure release. Therefore, a gate reset action must be performed during the cycle. However, due to the hydraulic circuit design, the control position often overshoots during the gate reset action, exceeding the brake opening / closing deviation range. This necessitates a gate adjustment action during mold closing to successfully complete the brake closing control. This instability in control increases the "gate adjustment" action in the process, wastes cycle time, and increases machine energy consumption. Therefore, it is necessary to optimize the cycle flow. Summary of the Invention

[0003] This invention overcomes the shortcomings of the above-mentioned technologies and provides a mold opening and closing control method for a two-platen hydraulic injection molding machine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A mold opening and closing control method for a two-platen hydraulic injection molding machine includes the following steps:

[0006] Step A: The system calculates the appropriate reference distance S1 for opening and closing the gate, and sets the opening distance S2 for gate reset in the opening parameter settings.

[0007] Step B: Start the machine to run automatically. When the machine runs to the mold-closed low-pressure position, compare it with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition, and adjust the mold opening distance S2 for gate reset. Specifically, if S2 is not less than a set maximum value Smax, then set the latest S2 = Smin; otherwise, if S2 is less than the set maximum value Smax, then set the latest S2 = original S2 + X, where Smin is a set minimum value and X is a set adjustment value.

[0008] Step C: When the actual position of each gate column is within the allowable deviation range for opening and closing the circuit breaker, then perform the following actions: closing the circuit breaker, high-voltage mold locking, injection molding, and mold locking pressure relief.

[0009] Step D: Move and reset the Goring column according to the latest S2;

[0010] Step E: Compare with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition. When the actual position of each gate is within the allowable opening and closing deviation range, perform the gate opening, mold opening, and ejector pin retraction actions, and then wait for the next mold opening and closing control.

[0011] Preferably, the process of determining whether the actual position of each gate column is within the allowable deviation range for opening and closing is as follows: determine whether the following conditions are met: S1-Y ≤ actual position value of gate column #1 ≤ S1+Y, S1-Y ≤ actual position value of gate column #2 ≤ S2+Y, S1-Y ≤ actual position value of gate column #3 ≤ S1+Y, and S1-Y ≤ actual position value of gate column #4 ≤ S1+Y, so as to determine whether the actual position of each gate column is within the allowable deviation range for opening and closing, where Y is the set allowable error value.

[0012] Preferably, the actual position of the Corinthian column is detected using an electronic ruler.

[0013] Preferably, if adjusting the actual position of each gatepost within a certain period of time fails to ensure that the actual position of each gatepost is within the allowable deviation range for opening and closing the gate, an abnormality is handled and an alarm is issued to indicate that the adjustment of the gateposts has failed.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The switching control method in this case detects and judges whether the actual position of each gate column is within the allowable deviation range between closing and closing the gate. When the condition is not met, the position of the gate column is adjusted so that closing can be performed after the condition is met. It has good practicality. In addition, when the condition is not met, the opening distance S2 of the gate column reset is also adjusted so that the gate column can be moved and reset according to the latest S2. After the gate is opened, if the actual position of each gate column is still not within the allowable deviation range, the position of the gate column needs to be adjusted again until the opening condition is met, and then the entire cycle is completed. This cycle automatically modifies the opening distance S2 of the gate column reset. After several automatic adjustments, the position of the gate column after reset is kept within the allowable deviation range of opening and closing. Thus, the machine can directly close the gate without adjusting the gate column again during the closing process. It achieves the purpose of optimizing the process, improving cycle efficiency, and saving energy. It has good practicality. Detailed Implementation

[0016] The following examples further illustrate the features and other related characteristics of the present invention in detail, to facilitate understanding by those skilled in the art:

[0017] A mold opening and closing control method for a two-platen hydraulic injection molding machine includes the following steps:

[0018] Step A: The system calculates the appropriate reference distance S1 for opening and closing the gate, and sets the opening distance S2 for gate reset in the opening parameter settings.

[0019] Step B: Start the machine to run automatically. When the machine runs to the mold-closed low-pressure position, compare it with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition, and adjust the mold opening distance S2 for gate reset. Specifically, if S2 is not less than a set maximum value Smax, then set the latest S2 = Smin; otherwise, if S2 is less than the set maximum value Smax, then set the latest S2 = original S2 + X, where Smin is a set minimum value and X is a set adjustment value.

[0020] Step C: When the actual position of each gate column is within the allowable deviation range for opening and closing the circuit breaker, then perform the following actions: closing the circuit breaker, high-voltage mold locking, injection molding, and mold locking pressure relief.

[0021] Step D: Move and reset the Goring column according to the latest S2;

[0022] Step E: Compare with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition. When the actual position of each gate is within the allowable opening and closing deviation range, perform the gate opening, mold opening, and ejector pin retraction actions, and then wait for the next mold opening and closing control.

[0023] As described above, the switching control method in this case detects and judges whether the actual position of each gate column is within the allowable deviation range between closing and closing the gate. When the condition is not met, the position of the gate column is adjusted so that closing can be performed after the condition is met. It has good practicality. In addition, when the condition is not met, the opening distance S2 of the gate column reset is also adjusted so that the gate column can be moved and reset according to the latest S2. After the gate is opened, if the actual position of each gate column is still not within the allowable deviation range of opening and closing, the position of the gate column needs to be adjusted again until the opening condition is met, and then the entire cycle is completed. The opening distance S2 of the gate column reset is automatically modified in this cycle. After several automatic adjustments, the position of the gate column after reset is kept within the allowable deviation range of opening and closing. Thus, the machine can directly close the gate without adjusting the gate column again during the closing process. It achieves the purpose of optimizing the process, improving cycle efficiency, and saving energy consumption. It has good practicality.

[0024] As described above, in specific implementation, the process of detecting and judging whether the actual position of each gate column is within the allowable deviation range for opening and closing is as follows: determine whether the following conditions are met: S1-Y ≤ actual position value of gate column #1 ≤ S1+Y, S1-Y ≤ actual position value of gate column #2 ≤ S2+Y, S1-Y ≤ actual position value of gate column #3 ≤ S1+Y, and S1-Y ≤ actual position value of gate column #4 ≤ S1+Y, so as to determine whether the actual position of each gate column is within the allowable deviation range for opening and closing, where Y is the set allowable error value.

[0025] As mentioned above, in practice, the actual position of the Corinthian column is detected using an electronic ruler.

[0026] As described above, in specific implementation, if adjusting the actual position of each gatepost within a certain period of time fails to ensure that the actual position of each gatepost is within the allowable deviation range for opening and closing the gate, an abnormality will be handled and an alarm will be issued to indicate that the adjustment of the gateposts has failed.

[0027] As stated above, this case protects a mold opening and closing control method for a two-platen hydraulic injection molding machine, and all technical solutions that are the same as or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. A mold opening and closing control method for a two-platen hydraulic injection molding machine, characterized in that... The steps include the following: Step A: The system calculates the appropriate reference distance S1 for opening and closing the gate, and sets the opening distance S2 for gate reset in the opening parameter settings. Step B: Start the machine to run automatically. When the machine runs to the mold-closed low-pressure position, compare it with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition, and adjust the mold opening distance S2 for gate reset. Specifically, if S2 is not less than a set maximum value Smax, then set the latest S2 = Smin; otherwise, if S2 is less than the set maximum value Smax, then set the latest S2 = original S2 + X, where Smin is a set minimum value and X is a set adjustment value. Step C: When the actual position of each gate column is within the allowable deviation range for opening and closing the circuit breaker, then perform the following actions: closing the circuit breaker, high-voltage mold locking, injection molding, and mold locking pressure relief. Step D: Move and reset the Goring column according to the latest S2; Step E: Compare with the appropriate opening and closing gate reference distance value S1 to check whether the actual position of each gate is within the allowable opening and closing deviation range. If the condition is not met, adjust the actual position of the gate to meet the condition. When the actual position of each gate is within the allowable opening and closing deviation range, perform the gate opening, mold opening, and ejector pin retraction actions, and then wait for the next mold opening and closing control.

2. The mold opening and closing control method for a two-platen hydraulic injection molding machine according to claim 1, characterized in that... The process of determining whether the actual position of each gatepost is within the allowable deviation range for opening and closing is as follows: determine whether the following conditions are met: S1-Y≤1# gatepost actual position value≤S1+Y, S1-Y≤2# gatepost actual position value≤S2+Y, S1-Y≤3# gatepost actual position value≤S1+Y, and S1-Y≤4# gatepost actual position value≤S1+Y. This is to determine whether the actual position of each gatepost is within the allowable deviation range for opening and closing, where Y is the set allowable error value.

3. The mold opening and closing control method for a two-platen hydraulic injection molding machine according to claim 1, characterized in that... The actual position of the Corinthian column was detected using an electronic ruler.

4. A mold opening and closing control method for a two-platen hydraulic injection molding machine according to any one of claims 1-3, characterized in that... If adjusting the actual position of each gatepost within a certain period of time fails to bring the actual position of each gatepost within the allowable deviation range for opening and closing, an abnormality will be handled and an alarm will be issued to indicate that the adjustment of the gateposts has failed.