Injection method and system based on injection molding machine

Abstract

The invention discloses a material injection method and system based on an injection molding machine, and belongs to the field of material injection of the injection molding machine, and the method comprises the following steps: S1, according to a preset time period, obtaining a residual distance between a current position and a target position of a screw rod of the injection molding machine; s2, judging whether the residual distance is smaller than or equal to a preset distance or not, if yes, calculating residual injection time corresponding to the residual distance, and S3, judging whether the residual injection time is a multiple of the time period or not, and adjusting the injection speed of the screw according to the updated residual injection time and the residual distance. According to the method, the remaining distance between the current position and the target position of the screw is obtained in real time, the remaining injection time is calculated according to the remaining distance and the preset time period, the injection speed of the screw can be more accurately controlled, and it is ensured that the screw accurately reaches the target position.

Description

Technical Field

[0001] The invention relates to the field of injection molding machine injection, and in particular to an injection molding machine-based injection method and system. Background Art

[0002] In the injection molding process, injection molding machines are commonly used equipment for the production of plastic products. In the injection process of traditional injection molding machines, the control of injection speed and time often relies on preset parameters, resulting in insufficient precision in actual operation. Especially when approaching the target position, precise control of the screw is crucial to ensuring product quality. If the remaining distance is not handled properly, it may lead to over-injection or under-injection, affecting the quality of the finished product and production efficiency. In addition, especially when the remaining injection time is not an integer multiple of the time period set by the control system, it is difficult to ensure the stability and repeatability of the system.

[0003] Therefore, in order to improve the injection quality of the injection molding machine and ensure the molding quality of the product, an injection method and system based on the injection molding machine are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an injection method and system based on an injection molding machine to solve the problem that in the injection process of a traditional injection molding machine mentioned in the above background technology, the control of injection speed and time often depends on preset parameters, resulting in insufficient precision in actual operation and affecting product quality.

[0005] To achieve the above object, the present invention provides the following technical solution: an injection method and system based on an injection molding machine, comprising the following steps:

[0006] S1, obtaining the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period;

[0007] S2, determining whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance;

[0008] S3, determining whether the remaining injection time is a multiple of the time period, and if not, adjusting the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and adjusting the injection speed of the screw according to the updated remaining injection time and the remaining distance;

[0009] S4, repeat the above steps until the remaining distance is determined to be zero, and control to stop injection;

[0010] As a further preferred embodiment of the present technical solution: the step of calculating the remaining injection time corresponding to the remaining distance comprises:

[0011] Obtain the current injection speed of the screw;

[0012] Determine the remaining injection time according to the remaining distance and the current injection speed;

[0013] As a further preference of this technical solution: after the step of determining whether the remaining injection time is a multiple of the time period, the method further includes:

[0014] If the remaining injection time is a multiple of the time period, adjust the injection speed of the screw according to the remaining injection time and the remaining distance;

[0015] Judge whether the remaining injection time t is a multiple of the time period T. If not, adjust the remaining injection time according to the preset adjustment rule to obtain the updated remaining injection time t new , so that t new is a multiple of T;

[0016] First, calculate the remainder r after dividing the remaining injection time by the time period. The calculation formula is: r = t mod T, and then determine the adjusted remaining injection time t based on the remainder r and the preset calculation rule new , and the preset calculation rule can be adopted in the following way:

[0017] If r < T / 2, then t new = t - r;

[0018] If r ≥ T / 2, then t n ew = t + (T - r);

[0019] After that, adjust the injection speed v of the screw according to the updated remaining injection time t new and the remaining distance D new , and the calculation formula is: v new = D / t new , and control the screw to continue injecting at the injection speed v new ;

[0020] As a further preference of this technical solution: the step of adjusting the remaining injection time according to the preset adjustment rule includes:

[0021] Calculate the remainder after dividing the remaining injection time by the time period;

[0022] Determine the adjusted remaining injection time based on the remainder and the preset calculation rule;

[0023] As a further preference of this technical solution: after the step of determining the injection speed of the screw according to the remaining injection time and the remaining distance, it includes:

[0024] Controlling the screw to continue injecting material at the injection speed;

[0025] As a further preferred embodiment of the technical solution: if the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed;

[0026] As a further preferred embodiment of the present technical solution: the injection system comprises:

[0027] An acquisition module, used for acquiring the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period;

[0028] A judging module, used for judging whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance;

[0029] a calculation module, configured to determine whether the remaining injection time is a multiple of the time period, and if not, to adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and to adjust the injection speed of the screw according to the updated remaining injection time and the remaining distance;

[0030] A stop module, used for repeating the above modules until the remaining distance is determined to be zero, and controlling the stopping of injection;

[0031] As a further preferred embodiment of the present technical solution: the judgment module is used for:

[0032] Obtaining the current injection speed of the screw;

[0033] Determine the remaining injection time according to the remaining distance and the current injection speed;

[0034] As a further preferred embodiment of the present technical solution: the calculation module is also used for:

[0035] If the remaining injection time is a multiple of the time period, adjusting the injection speed of the screw according to the remaining injection time and the remaining distance;

[0036] Calculating the remainder after dividing the remaining injection time by the time period;

[0037] Determining the adjusted remaining injection time based on the remainder and a preset calculation rule;

[0038] As a further preferred embodiment of the present technical solution: if the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention can more accurately control the injection speed of the screw by acquiring the remaining distance between the current position of the screw and the target position in real time and calculating the remaining injection time according to the remaining distance and the preset time period, thereby ensuring that the screw reaches the target position accurately;

[0041] 2. The present invention automatically adjusts the remaining injection time to a multiple of the time period by presetting the adjustment rules, thereby reducing the time waste caused by manual adjustment and improving production efficiency;

[0042] 3. Among them, by accurately controlling the injection speed and screw position, it can effectively reduce material waste caused by inaccurate injection and reduce production costs;

[0043] 4. In addition, this method can automatically adjust the injection speed according to different remaining distances and remaining injection times, which is suitable for various types of injection molding tasks and improves the adaptability and application range of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The present invention is a structural schematic diagram of an injection method and system based on an injection molding machine. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example

[0047] See also Figure 1 As shown, the present invention provides a technical solution: an injection method and system based on an injection molding machine, comprising the following steps:

[0048] S1, obtaining the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period;

[0049] S2, determining whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance;

[0050] S3. Determine whether the remaining injection time is a multiple of the time period. If not, adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and adjust the feeding speed of the screw according to the updated remaining injection time and the remaining distance;

[0051] S4. Repeat the above steps until it is determined that the remaining distance is zero, and control the stop of feeding.

[0052] In this embodiment, specifically: the step of calculating the remaining injection time corresponding to the remaining distance includes:

[0053] Obtain the current feeding speed of the screw;

[0054] Determine the remaining injection time according to the remaining distance and the current feeding speed.

[0055] In this embodiment, specifically: after the step of determining whether the remaining injection time is a multiple of the time period, the method further includes:

[0056] If the remaining injection time is a multiple of the time period, adjust the feeding speed of the screw according to the remaining injection time and the remaining distance;

[0057] Judge whether the remaining injection time t is a multiple of the time period T. If not, adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time t new , so that t new is a multiple of T;

[0058] First, calculate the remainder r after dividing the remaining injection time by the time period. The calculation formula is: r = t mod T, and then determine the adjusted remaining injection time t based on the remainder r and a preset calculation rule new , and the preset calculation rule can be adopted in the following way:

[0059] If r < T / 2, then t new = t - r;

[0060] If r ≥ T / 2, then t n ew = t + (T - r);

[0061] After that, adjust the feeding speed v of the screw according to the updated remaining injection time t new and the remaining distance D new , and the calculation formula is: v new = D / t new , and control the screw to continue feeding at the feeding speed v new .

[0062] In this embodiment, specifically: the step of adjusting the remaining injection time according to the preset adjustment rule includes:

[0063] Calculating the remainder after dividing the remaining injection time by the time period;

[0064] Determining the adjusted remaining injection time based on the remainder and a preset calculation rule;

[0065] In a specific embodiment, the feeding step is as follows:

[0066] Step 1: Get the remaining distance;

[0067] According to the preset time period T (unit: seconds), the current position P of the screw of the injection molding machine is obtained through a high-precision position detection device (such as a laser displacement sensor or a capacitive displacement sensor, etc.) current (Unit: mm) and target position P target (Unit: mm) The remaining distance D (Unit: mm) between the two is calculated as: D = P t arget-P current .

[0068] Step 2: Determine the remaining distance and calculate the remaining injection time;

[0069] Determine whether the remaining distance D is less than or equal to the preset distance D0 (unit: mm). The preset distance D0 is set according to the precision requirements of the injection molding machine and actual production experience. If D≤D0, calculate the remaining injection time t (unit: second) corresponding to the remaining distance. When calculating, first obtain the current injection speed v (unit: mm / s) of the screw, which can be measured in real time by a speed sensor or calculated according to relevant parameters in the injection molding machine control system. Calculate the remaining injection time according to the formula t=D / v;

[0070] Step 3: Determine the remaining injection time and adjust it (if the multiple relationship is not met)

[0071] Determine whether the remaining injection time t is a multiple of the time period T. If not, first calculate the remainder r after dividing the remaining injection time by the time period, and the calculation formula is: r = t mod T. Then, based on the remainder r and the preset calculation rule, determine the adjusted remaining injection time t new ,The preset calculation rules are as follows: If r≥T / 2, then t new =t+(Tr). Then the remaining injection time t is updated according to the new and the remaining distance D to adjust the injection speed v of the screw new (Unit: mm / s), the calculation formula is: vnew =D / t new . And control the screw according to the injection speed v new Continue to inject material;

[0072] Step 4: Repeat the operation until the injection stops.

[0073] Repeat the above steps 1 to 3 until it is determined that the remaining distance D is zero, at which time the injection is stopped to ensure that the screw reaches the target position accurately, thus completing the injection operation during the injection molding process.

[0074] In this embodiment, specifically: after the step of determining the injection speed of the screw according to the remaining injection time and the remaining distance, the method includes:

[0075] The screw is controlled to continue injecting material at the injection speed.

[0076] In this embodiment, specifically: if the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed.

[0077] In this embodiment, specifically: a system based on an injection molding machine includes:

[0078] An acquisition module, used for acquiring the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period;

[0079] A judging module, used for judging whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance;

[0080] a calculation module, configured to determine whether the remaining injection time is a multiple of the time period, and if not, to adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and to adjust the injection speed of the screw according to the updated remaining injection time and the remaining distance;

[0081] The stop module is used to repeat the above modules until the remaining distance is determined to be zero, and control the stopping of the injection.

[0082] In this embodiment, specifically: the judgment module is used to:

[0083] Obtaining the current injection speed of the screw;

[0084] The remaining injection time is determined according to the remaining distance and the current injection speed.

[0085] In this embodiment, specifically: the calculation module is also used for:

[0086] If the remaining injection time is a multiple of the time period, adjusting the injection speed of the screw according to the remaining injection time and the remaining distance;

[0087] Calculating the remainder after dividing the remaining injection time by the time period;

[0088] The adjusted remaining injection time is determined based on the remainder and a preset calculation rule.

[0089] In this embodiment, specifically: if the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material injection method and system based on an injection molding machine, characterized in that: The following steps are involved: S1, obtaining the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period; S2, determining whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance; S3, determining whether the remaining injection time is a multiple of the time period, and if not, adjusting the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and adjusting the injection speed of the screw according to the updated remaining injection time and the remaining distance; S4, repeat the above steps until it is determined that the remaining distance is zero, and control to stop injection.

2. The injection method and system based on an injection molding machine according to claim 1, characterized in that: The step of calculating the remaining injection time corresponding to the remaining distance comprises: Obtaining the current injection speed of the screw; The remaining injection time is determined according to the remaining distance and the current injection speed.

3. The injection method and system based on an injection molding machine according to claim 1, characterized in that: After the step of determining whether the remaining injection time is a multiple of the time period, the method further includes: If the remaining injection time is a multiple of the time period, adjusting the injection speed of the screw according to the remaining injection time and the remaining distance; Determine whether the remaining injection time t is a multiple of the time period T. If not, adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time t. new , so that t new is a multiple of T; First, the remainder r after dividing the remaining injection time by the time period is calculated, and the calculation formula is: r = tmodT, and then the adjusted remaining injection time t is determined based on the remainder r and the preset calculation rule. new , the preset calculation rules can be adopted as follows: If r < T / 2, then t new = t - r; If r ≥ T / 2, then t n ew=t+(Tr); Then update the remaining injection time t according to new and the remaining distance D to adjust the injection speed v of the screw new , the calculation formula is: new =D / t new , and control the screw to follow the injection speed v new Continue filling.

4. The injection method and system based on an injection molding machine according to claim 1, characterized in that: The step of adjusting the remaining injection time according to a preset adjustment rule comprises: Calculating the remainder after dividing the remaining injection time by the time period; The adjusted remaining injection time is determined based on the remainder and a preset calculation rule.

5. The injection method and system based on an injection molding machine according to claim 1, characterized in that: After the step of determining the injection speed of the screw according to the remaining injection time and the remaining distance, the method further comprises: The screw is controlled to continue injecting material at the injection speed.

6. The system based on an injection molding machine according to claim 1, characterized in that: If the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed.

7. The injection method and system based on an injection molding machine according to claim 1, characterized in that: include: An acquisition module, used for acquiring the remaining distance between the current position and the target position of the screw of the injection molding machine according to a preset time period; A judging module, used for judging whether the remaining distance is less than or equal to a preset distance, and if so, calculating the remaining injection time corresponding to the remaining distance; a calculation module, configured to determine whether the remaining injection time is a multiple of the time period, and if not, to adjust the remaining injection time according to a preset adjustment rule to obtain an updated remaining injection time, so that the updated remaining injection time is a multiple of the time period, and to adjust the injection speed of the screw according to the updated remaining injection time and the remaining distance; The stop module is used to repeat the above modules until the remaining distance is determined to be zero, and control the stopping of the injection.

8. The injection method and system based on an injection molding machine according to claim 7, characterized in that: The judging module is used for: Obtaining the current injection speed of the screw; The remaining injection time is determined according to the remaining distance and the current injection speed.

9. The injection method and system based on an injection molding machine according to claim 7, characterized in that: The calculation module is also used to: If the remaining injection time is a multiple of the time period, adjusting the injection speed of the screw according to the remaining injection time and the remaining distance; Calculating the remainder after dividing the remaining injection time by the time period; The adjusted remaining injection time is determined based on the remainder and a preset calculation rule.

10. The injection method and system based on an injection molding machine according to claim 7, characterized in that: If the remaining distance is greater than the preset distance, the screw is controlled to continue injecting at a preset injection speed.

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