Time schedule controller for starting control of injection molding hot runner valve needle and method thereof

Abstract

The invention provides a time schedule controller for injection molding hot runner valve needle starting control and a method thereof. The time schedule controller comprises a first working mode and a second working mode which have the same injection signal starting time, the first delay time length is larger than the second delay time length, and the first starting time length is larger than the second starting time length, or the first starting time length is larger than the second starting time length. The first delay time length is smaller than the second delay time length and the first starting time length is smaller than the second starting time length; wherein in the first working mode and the second working mode, time sequence state control is realized by a state machine, and the state machine comprises a first state, a second state, a third state and a fourth state based on high and low levels of an injection signal, a delay signal and an opening signal. Therefore, the delay time and the starting time of opening the valve needle which are prolonged / shortened proportionally in different working modes are managed through the state machine, and accurate time sequence control over starting of the valve needle of the injection molding machine can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding machines, and more specifically, to a timing controller and method thereof for starting control of a valve needle of an injection molding hot runner. Background Art

[0002] An injection molding machine is a device used to mold thermoplastics or thermosetting plastics. It melts the plastic material by heating, and then uses high pressure to inject the molten plastic into the mold. After cooling and shaping, a product of the desired shape is obtained. It can be widely used in many industries such as automobiles, electronic appliances, packaging, building materials, and medical care.

[0003] Compared with traditional cold runner injection molding machines, needle valve hot runner injection molding machines can use hot runner technology to ensure that the plastic melt remains in a molten state throughout the process from the injection molding machine nozzle to the mold cavity, thereby avoiding the generation of waste caused by gate solidification and improving material utilization and production efficiency.

[0004] The core of the needle-valve hot runner injection molding machine lies in the valve needle controller, which is used to accurately control the opening and closing of the valve needle at each mold gate to achieve precise control of the flow of molten injection material into the mold cavity. Specifically, when the injection molding machine completes an injection, the valve needle closes to prevent the injection material from continuing to flow into the cavity; when the next cycle begins, the valve needle reopens to allow new molten injection material to enter, which not only enables multi-point simultaneous injection, but also effectively prevents the injection material from solidifying or overflowing prematurely. Therefore, it is necessary to use a timing controller to control the valve needle start of the needle-valve hot runner injection molding machine.

[0005] Therefore, it is necessary to provide a timing controller solution that can achieve more precise start-up control of the injection hot runner valve needle. Summary of the invention

[0006] An embodiment of the present application provides a timing controller and method for controlling the start-up of a valve needle in a hot runner injection molding machine, which achieves precise timing control of the start-up of the valve needle of an injection molding machine by managing the delay time and start-up time of valve needle opening that are proportionally extended / shortened in different working modes through a state machine.

[0007] According to one aspect of the present application, a timing controller for start-up control of a valve needle of an injection molding hot runner is provided, comprising: a first operating mode and a second operating mode having the same injection signal start-up time, wherein, in the first operating mode, the start-up delay of the valve needle has a first delay time length, and the start-up time period of the valve needle has a first start-up time length; in the first operating mode, the start-up delay of the valve needle has a second delay time length, and the start-up time period of the valve needle has a second start-up time length; wherein, the first delay time length is greater than the second delay time length and the first start-up time length is greater than the second start-up time length, or, the first delay time length is greater than the second delay time length a delay time length is less than the second delay time length and the first start-up time length is less than the second start-up time length; wherein, in the first working mode and the second working mode, the timing state control of the timing controller is implemented by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low levels, a second state in which the injection signal and the delay signal are high levels and the start signal is low level, a third state in which the injection signal is high level, the delay signal is low level and the start signal is high level, and a fourth state in which the injection signal is high level, and the delay signal and the start signal are low levels.

[0008] In the above-mentioned timing controller for injection molding hot runner valve needle start control, the first delay time length in the first working mode has a first adjustable delay time length and a third adjustable delay time length, and the first start time length has a first adjustable start time length and a third adjustable start time length; the first adjustable delay time length is greater than the third adjustable delay time length and the first adjustable start time length is less than the third adjustable start time length, or, the first adjustable delay time length is less than the third adjustable delay time length and the first adjustable start time length is greater than the third adjustable start time length.

[0009] In the above-mentioned timing controller for injection molding hot runner valve needle start control, the second delay time length in the second working mode has a second adjustable delay time length and a fourth adjustable delay time length, and the second start time length has a second adjustable start time length and a fourth adjustable start time length; the second adjustable delay time length is greater than the fourth adjustable delay time length and the second adjustable start time length is less than the fourth adjustable start time length, or, the second adjustable delay time length is less than the fourth adjustable delay time length and the second adjustable start time length is greater than the fourth adjustable start time length.

[0010] In the above timing controller for injection hot runner valve needle start control, the total length of the delay time length and the start time length in different working modes is less than or equal to the start time length of the injection signal.

[0011] In the above-mentioned timing controller for injection hot runner valve needle start control, the state machine includes the following state transition paths: the first state to the second state, the second state to the third state, the third state to the fourth state, the fourth state to the first state, and the third state to the first state.

[0012] In the above-mentioned timing controller for injection hot runner valve needle start control, the state machine further includes the following state transition paths: the fourth state to the third state, the fourth state to the second state, and the third state to the second state.

[0013] In the above timing controller for injection hot runner valve needle start control, the overall timing control is performed directly by setting the time parameters of the first state, the second state, the third state and the fourth state.

[0014] In the above-mentioned timing controller for injection molding hot runner valve needle start control, the first start time length and / or the second start time length are set based on common influencing factors including the injection speed of the injection molding material, the flow characteristics of the injection molding material and the dimensional parameters of the mold cavity.

[0015] In the above-mentioned timing controller for injection molding hot runner valve needle start control, when the time parameter value of the third state relative to the sum of the time parameter value of the second state and the time parameter value of the third state is the original hypothesis ratio factor, and the time parameter value of the second state relative to the sum of the time parameter value of the second state and the time parameter value of the third state is the alternative hypothesis ratio factor, the determination of the optimized ratio of the first startup time length and / or the second startup time length relative to the sum of the first startup time length and the first delay time length and / or the sum of the second startup time length and the second delay time length includes: calculating a common benchmark cross factor for representing the mutual strong correlation between the first startup time length and / or the second startup time length and the first delay time length and / or the second delay time length based on a common summation benchmark; calculating the strong correlation significance factor corresponding to the original hypothesis ratio factor under the common benchmark cross factor; and performing correlation reduction with the original hypothesis ratio factor and the strong correlation significance factor to obtain the optimized ratio.

[0016] According to another aspect of the present application, a timing control method of a timing controller for injection hot runner valve needle start control is provided, comprising: setting a first working mode and a second working mode with the same injection signal start time, wherein, in the first working mode, the start delay of the valve needle has a first delay time length, and the start time period of the valve needle has a first start time length, and in the second working mode, the start delay of the valve needle has a second delay time length, and the start time period of the valve needle has a second start time length; setting the first delay time length to be greater than the second delay time length and the first start time length to be greater than the second start time length, or , the first delay time length is less than the second delay time length and the first start-up time length is less than the second start-up time length; and, in the first working mode and the second working mode, the timing state control of the timing controller is implemented by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low, a second state in which the injection signal and the delay signal are high and the start signal is low, a third state in which the injection signal is high, the delay signal is low and the start signal is high, and a fourth state in which the injection signal is high, and the delay signal and the start signal are low.

[0017] The timing controller and method for controlling the start-up of the injection molding hot runner valve needle provided in the embodiment of the present application can manage the delay time and start-up time of the valve needle opening that are proportionally extended / shortened in different working modes through a state machine, thereby achieving precise timing control of the start-up of the valve needle of the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present application will become clear to those of ordinary skill in the art. The drawings in the specification are only used for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0019] Figure 1 The figure illustrates a schematic timing diagram of two working modes of a timing controller for start-up control of a hot runner valve needle for injection molding according to an embodiment of the present application.

[0020] Figure 2 A schematic diagram of a state machine implementation of a timing controller for injection molding hot runner valve needle start control according to an embodiment of the present application is illustrated.

[0021] Figure 3 The figure illustrates a schematic timing diagram of multi-stage valve needle opening of a timing controller for injection hot runner valve needle startup control according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0023] When the valve needle of a needle valve hot runner injection molding machine is controlled by a timing controller, the timing controller needs to detect the injection signal of the injection molding machine, adjust the closing of the valve needle at different time periods according to the injection needs of the customer's mold, and accurately open and close the valve needle of the pneumatic and oil valve needle valve nozzles. In other words, the timing controller needs to start the workflow by receiving the injection signal from the injection molding machine itself or other external systems, and delay the opening and closing time of the valve needle based on the delay signal by setting the delay time, etc., and also needs to control the opening and closing of the valve needle by opening or closing the signal.

[0024] Among them, the working process of the timing controller in the main working period needs to rely on the injection signal, that is, once the injection signal is received, it means that the injection material is about to flow in, and the valve needle needs to be opened at this time, so that the mold cavity enters the gate open state. After the injection signal stops, the valve needle needs to be closed, so that the mold cavity enters the gate closed state.

[0025] One of the main functions of the timing controller for hot runner injection molding valve needle start control according to the embodiment of the present application is to set the delay time for controlling the valve needle to open. Here, the delay time refers to the time interval from when the timing controller receives the injection signal to when the valve needle opens. By reasonably setting an appropriate delay time, the smooth progress of the injection molding process can be ensured and a series of potential problems can be avoided.

[0026] For example, by setting an appropriate delay time, on the one hand, it can ensure that the molten injection material reaches the valve needle and avoid empty injection. That is, if the valve needle is opened too early and the molten injection material has not yet reached the valve needle position, empty injection will occur, and not enough injection material will enter the mold cavity, resulting in insufficient filling. On the other hand, overflow can be prevented. That is, if the valve needle is opened too late, the molten injection material has reached the valve needle position and begins to accumulate, which may cause overflow or unnecessary pressure accumulation.

[0027] In addition, by setting an appropriate delay time, the injection speed and pressure can be controlled to achieve smooth injection and optimized flow, that is, by setting an appropriate delay time, the molten injection material can be ensured to enter the mold cavity under stable conditions, avoiding pressure fluctuations caused by the sudden opening of the valve needle, and helping to optimize the flow of the molten injection material in the hot runner, making it more uniform and smooth, reducing problems such as bubbles and weld lines. Moreover, the appropriate delay time can ensure uniform filling of the mold cavity, avoid local underfilling or overfilling, and reduce the occurrence of defects such as bubbles.

[0028] In the actual setting process, the delay time can be preliminarily set according to the injection speed of the injection molding machine, the flow characteristics of the molten injection material, the distance of the mold cavity and other parameters to set the initial range of the delay time, and gradually adjusted through actual production and testing. For example, in the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application.

[0029] In addition, during the actual production and testing process, it can be found that the delay time of the timing controller is also related to the opening time of the valve needle. Here, the appropriate opening time of the valve needle is used to ensure that the molten injection molding material enters the mold cavity at the correct time and in the correct amount, thereby directly affecting the filling effect of the mold cavity. On the one hand, too long a valve needle opening time will cause too much molten injection molding material to enter the cavity, causing overflow or over-filling, and on the other hand, too short a valve needle opening time will cause the molten injection molding material to fail to completely fill the cavity, resulting in insufficient filling. Therefore, another main function of the timing controller for injection molding hot runner valve needle start-up control according to the embodiment of the present application is to set the opening time for controlling the opening of the valve needle.

[0030] Similarly, the opening time of the valve needle also needs to be adjusted based on specific parameters, mainly including the injection temperature, that is, the temperature of the molten injection material will affect its fluidity, so it needs to be considered when adjusting the opening time; the injection pressure, that is, the injection pressure will affect the injection speed of the molten injection material, so it needs to be considered when adjusting the opening time; the flow characteristics of the molten injection material, that is, the flow characteristics and cooling characteristics of different materials are different, so it needs to be considered when adjusting the opening time; the volume of the mold cavity, etc.

[0031] Here, from the perspective of the timing control relationship of the timing controller, after the timing controller receives the injection signal, it opens the valve needle after the set delay time, and closes the valve needle after the set opening time, thereby ending the injection molding process at the current stage. According to the above description of the delay time and opening time of the valve needle for underfilling and overfilling, a delay time that is too short and a valve needle opening time that is too short will cause underfilling, while a delay time that is too long and a valve needle opening time that is too long will cause overfilling.

[0032] Therefore, under the same working mode, it is necessary to ensure that the delay time of the valve needle opening of the timing controller for the injection hot runner valve needle start-up control according to the embodiment of the present application is inversely proportional to the opening time, that is, the shorter the time length of the opening time period of the valve needle for injecting the molten injection material, the longer the time length of the delay time period should be set accordingly. Conversely, the longer the time length of the opening time period of the valve needle for injecting the molten injection material, the shorter the time length of the delay time period should be set accordingly.

[0033] However, on the other hand, the timing controller for the hot runner valve needle start control of the injection molding according to the embodiment of the present application is not applied to a single timing control mode, that is, for the above parameters for determining the injection speed of the injection molding material, the flow characteristics of the injection molding material and the scale parameters of the mold cavity, such as distance and volume, the timing controller can control the delay, opening and closing of the valve needle based on multiple timing control modes. In addition, by comparing the factors affecting the delay time and opening time of the valve needle opening, including the injection speed of the injection molding material, the flow characteristics of the injection molding material and the scale parameters of the mold cavity, they are all common factors affecting the delay time and opening time of the valve needle opening. Therefore, between different modes, the delay time and opening time of the valve needle opening have a proportional relationship. That is, the longer the time length of the opening time period of the valve needle used to inject the molten injection molding material, the longer the time length of the delay time period should be set accordingly. Conversely, the shorter the time length of the opening time period of the valve needle used to inject the molten injection molding material, the shorter the time length of the delay time period should be set accordingly.

[0034] Based on this, the timing controller for injection molding hot runner valve needle start-up control according to the embodiment of the present application includes: a first working mode and a second working mode having the same injection signal start-up time, wherein, in the first working mode, the start-up delay of the valve needle has a first delay time length, and the start-up time period of the valve needle has a first start-up time length, and, in the first working mode, the start-up delay of the valve needle has a second delay time length, and the start-up time period of the valve needle has a second start-up time length; wherein, the first delay time length is greater than the second delay time length and the first start-up time length is greater than the second start-up time length, or, the first delay time length is less than the second delay time length and the first start-up time length is less than the second start-up time length.

[0035] Furthermore, in a timing controller for injection molding hot runner valve needle start-up control according to an embodiment of the present application, the first delay time length in the first working mode has a first adjustable delay time length and a third adjustable delay time length, and the first start time length has a first adjustable start time length and a third adjustable start time length, wherein the first adjustable delay time length is greater than the third adjustable delay time length and the first adjustable start time length is less than the third adjustable start time length, or the first adjustable delay time length is less than the third adjustable delay time length and the first adjustable start time length is greater than the third adjustable start time length.

[0036] Similarly, in a timing controller for injection molding hot runner valve needle start-up control according to an embodiment of the present application, the second delay time length in the second working mode has a second adjustable delay time length and a fourth adjustable delay time length, and the second start time length has a second adjustable start time length and a fourth adjustable start time length, wherein the second adjustable delay time length is greater than the fourth adjustable delay time length and the second adjustable start time length is less than the fourth adjustable start time length, or, the second adjustable delay time length is less than the fourth adjustable delay time length and the second adjustable start time length is greater than the fourth adjustable start time length.

[0037] Figure 1 The figure shows a schematic timing diagram of two working modes of a timing controller for starting control of a hot runner valve needle for injection molding according to an embodiment of the present application. Figure 1 As shown, the start time of the injection signal is 10 seconds. In the first working mode, the first delay time length is set to three seconds, and the first start time length is set to seven seconds. In the second working mode, the second delay time length is set to two seconds, and the second start time length is set to five seconds.

[0038] Here, those skilled in the art can understand that if the opening time of the injection signal is set to ten seconds under the same working mode, if the delay time is set from three seconds to two seconds, then the start time length of the valve needle should also be extended accordingly. However, the start time length of the valve needle can only be set to be effective within eight seconds, because when the injection signal time ends, the timing controller should control the valve needle to close and end the start time period of the valve needle, that is, the valve needle stops working. Therefore, in the embodiment of the present application, the total length of the delay time length plus the start time length under different working modes is set to be less than or equal to the opening time length of the injection signal, so as to ensure the continuity and stability of the injection molding process. That is, if the sum of the delay time length and the start time length is greater than the opening time length of the injection signal, then an interruption may occur during the injection process, that is, before the injection signal is turned off, the valve needle has not completed its action, resulting in a discontinuous injection molding process, and it cannot be guaranteed that when the injection signal is turned off, the valve needle has completed the opening and closing actions, resulting in the inability to maintain synchronization and continuity in the injection molding process.

[0039] Therefore, in the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application, the total length of the delay time length and the start time length in different working modes is less than or equal to the start time length of the injection signal.

[0040] In one example, the timing controller for the injection hot runner valve needle start control according to the embodiment of the present application can be simply set by manual key operation for the timing control of the delay time and the start time under the injection signal start time of different working modes. For example, in the case where there are only a mode setting button and an increase and decrease control button, you can first press the mode setting button once to select a different working mode through the increase and decrease control button, and then press the mode setting button once to set the delay time through the increase and decrease control button, and finally press the mode setting button once to set the start time through the increase and decrease control button.

[0041] However, if more precise control is required and the injection molding machine performs timing control on multiple gates, it is necessary to ensure the synchronization stability of the timing control of the multiple gates. The timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application can further perform timing control based on different working modes by using a state machine based on the signal state in the working mode of the timing controller.

[0042] Specifically, for Figure 1The different working modes shown in the figure, the state machine includes a first state in which the injection signal, the delay signal and the start signal are all low level, a second state in which the injection signal and the delay signal are high level and the start signal is low level, a third state in which the injection signal is high level, the delay signal is low level and the start signal is high level, and a fourth state in which the injection signal is high level, and the delay signal and the start signal are low level.

[0043] That is, in the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application, only when the injection signal is at a high level, there is a possibility that the delay signal and the start signal are at a high level, and the high and low level modes of the delay signal and the start signal are opposite, that is, when the delay signal is at a high level, the start signal is at a low level, and when the delay signal is at a low level, the start signal is at a high level. Therefore, the state machine control implementation of the above timing controller only requires four states to perform timing control based on different working modes, which can achieve high-performance timing control to a large extent.

[0044] For example, in the embodiment of the present application, the first state, the second state, the third state and the fourth state can be respectively called an inactive state, a pending state, an active state and a standby state. After setting the four states of the state machine, it is necessary to continue to set the state transition path of the state machine.

[0045] Figure 2 FIG. 1 is a schematic diagram of a state machine implementation of a timing controller for hot runner injection molding valve needle start control according to an embodiment of the present application. Figure 2 As shown, for the invalid state, pending state, valid state and standby state, according to Figure 1 The different working modes of the timing control shown in the figure, first, the invalid state, pending state, valid state and standby state have sequential state transition paths, that is, the state transition paths from the invalid state to the pending state, the pending state to the valid state, the valid state to the standby state, and the standby state to the invalid state are set respectively.

[0046] In addition, if Figure 1 As shown in the first working mode, when the total length of the delay time length and the start time length is equal to the start time length of the injection signal, there is a state transition path from the valid state to the invalid state.

[0047] In addition, according to the timing controller for the injection molding hot runner valve needle start control of the embodiment of the present application, there is a situation where multiple valve needles are opened within the same injection signal opening time period, for example, Figure 3 The third working mode and the fourth working mode shown. Here, Figure 3The diagram shows a schematic timing diagram of multi-stage valve needle opening of a timing controller for injection hot runner valve needle start control according to an embodiment of the present application. Therefore, the state machine requires a state transition path from the standby state to the effective state and from the standby state to the pending state. Of course, those skilled in the art can understand that, in the case where multi-stage valve needle opening control within the same injection signal start period is not required, the state machine implementation according to the embodiment of the present application does not require a state transition path from the standby state to the effective state and from the standby state to the pending state.

[0048] Similarly, in the case of the above multi-stage valve needle opening, the delay signal can also be started immediately after the opening signal is turned off. Therefore, the state machine can also have a state transition path from the valid state to the pending state.

[0049] Therefore, in the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application, in different working modes, the timing state control of the timing control is implemented by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low level, a second state in which the injection signal and the delay signal are high level and the start signal is low level, a third state in which the injection signal is high level, the delay signal is low level and the start signal is high level, and a fourth state in which the injection signal is high level, and the delay signal and the start signal are low level.

[0050] Furthermore, in the above-mentioned timing controller for injection hot runner valve needle start control, the state machine includes the following state transition paths: the first state to the second state, the second state to the third state, the third state to the fourth state, the fourth state to the first state, and the third state to the first state.

[0051] In addition, in the above-mentioned timing controller for injection hot runner valve needle start control, the state machine further includes the following state transition paths: the fourth state to the third state, the fourth state to the second state, and the third state to the second state.

[0052] Furthermore, in the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application, under the timing state control implementation of the state machine, the overall timing control can be performed directly by setting the time parameters in each state.

[0053] In one example, as described above, when the delay time is proportional to the opening time in different working modes, it is possible to consider setting the time parameters of the pending state and the effective state to a specific positive correlation, that is, the delay time maintains a predetermined proportional coefficient relative to the opening time. Then, in actual operation, the opening time is first determined by the injection speed of the injection molding material, the flow characteristics of the injection molding material, and the scale parameters of the mold cavity. Then, based on the fact that the delay time has a common influencing factor with the opening time, the ratio factor of the opening time relative to the sum of the opening time and the delay time can be used as the original hypothesis when the sum of the opening time and the delay time is taken as the common summation reference, that is, 1, and is expressed as , then relatively speaking, the ratio factor corresponding to the delay time is the alternative hypothesis, expressed as .

[0054] Then, in order to achieve a strong mutual coupling correlation between the turn-on time and the delay time based on the common summation reference 1, the common reference crossover factor can be calculated as: .

[0055] Therefore, the strong correlation significance factor corresponding to the original hypothesis object, that is, the opening time, under the common reference cross factor is expressed as: .

[0056] Then, the predetermined ratio factor corresponding to the original hypothesis object and the strong correlation significance factor Perform correlation reduction to obtain the required combination ratio coefficient : .

[0057] That is, since the delay time and the turn-on time form a combined correlation relationship relative to a common benchmark for common influencing factors under different working modes, through the coupling filling effect of strong correlation based on the null hypothesis and the alternative hypothesis, the optimized combination can be found based on the impact significance, thereby improving the accuracy of the fixed ratio based on the combined correlation.

[0058] In summary, reasonable setting of the opening time and the delay time can ensure efficient and stable operation of the needle valve hot runner injection molding machine. Therefore, by accurately controlling the opening time and the delay time, product quality and production efficiency can be significantly improved.

[0059] Furthermore, through the precise timing control of the timing controller for injection molding hot runner valve needle start control according to the embodiment of the present application, the weld marks that cause defects on the surface of the molded product can be eliminated, or the positions of the weld marks on the product surface can be reset, so as to achieve the purpose of making the injection molded product free of bonding lines and improving the quality of the molded product.

[0060] In addition, in another example, a timing control method of a timing controller for injection hot runner valve needle start control is provided, comprising: setting a first working mode and a second working mode with the same injection signal start time, wherein, in the first working mode, the start delay of the valve needle has a first delay time length, and the start time period of the valve needle has a first start time length, and in the second working mode, the start delay of the valve needle has a second delay time length, and the start time period of the valve needle has a second start time length; setting the first delay time length to be greater than the second delay time length and the first start time length to be greater than the second start time length, or , the first delay time length is less than the second delay time length and the first start-up time length is less than the second start-up time length; and, in the first working mode and the second working mode, the timing state control of the timing controller is implemented by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low, a second state in which the injection signal and the delay signal are high and the start signal is low, a third state in which the injection signal is high, the delay signal is low and the start signal is high, and a fourth state in which the injection signal is high, and the delay signal and the start signal are low.

[0061] Here, the technical personnel of the present application can understand that the details of the timing control method of the timing controller for start-up control of the injection hot runner valve needle have been described in the previous description of the timing controller for start-up control of the injection hot runner valve needle according to the embodiment of the present application, and will not be repeated here to avoid redundancy.

[0062] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0063] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0064] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0065] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0066] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A timing controller for hot runner injection molding valve needle start control, comprising: A first working mode and a second working mode having the same injection signal start time, wherein, in the first working mode, the start delay of the valve needle has a first delay time length, and the start time period of the valve needle has a first start time length, and in the second working mode, the start delay of the valve needle has a second delay time length, and the start time period of the valve needle has a second start time length; wherein, the first delay time length is greater than the second delay time length and the first start time length is greater than the second start time length, or, the first delay time length is less than the second delay time length and the first start time length is less than the second start time length; wherein, in the first working mode and the second working mode, the timing state control of the timing controller is implemented by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low, a second state in which the injection signal and the delay signal are high and the start signal is low, a third state in which the injection signal is high, the delay signal is low and the start signal is high, and a fourth state in which the injection signal is high, and the delay signal and the start signal are low.

2. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 1, wherein: The first delay time length in the first working mode has a first adjustable delay time length and a third adjustable delay time length, and the first start time length has a first adjustable start time length and a third adjustable start time length; the first adjustable delay time length is greater than the third adjustable delay time length and the first adjustable start time length is less than the third adjustable start time length, or, the first adjustable delay time length is less than the third adjustable delay time length and the first adjustable start time length is greater than the third adjustable start time length.

3. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 1, wherein: The second delay time length in the second working mode has a second adjustable delay time length and a fourth adjustable delay time length, and the second start time length has a second adjustable start time length and a fourth adjustable start time length; the second adjustable delay time length is greater than the fourth adjustable delay time length and the second adjustable start time length is less than the fourth adjustable start time length, or, the second adjustable delay time length is less than the fourth adjustable delay time length and the second adjustable start time length is greater than the fourth adjustable start time length.

4. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 1, wherein: The total length of the sum of the delay time length and the start time length in different working modes is less than or equal to the start time length of the injection signal.

5. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 4, wherein: The state machine includes the following state transition paths: the first state to the second state, the second state to the third state, the third state to the fourth state, the fourth state to the first state, and the third state to the first state.

6. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 5, wherein: The state machine further includes the following state transition paths: the fourth state to the third state, the fourth state to the second state, and the third state to the second state.

7. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 6, wherein: The overall timing control is performed directly by setting the time parameters of the first state, the second state, the third state and the fourth state.

8. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 7, wherein: The first start-up time length and / or the second start-up time length are set based on common influencing factors including the injection speed of the injection molding material, the flow characteristics of the injection molding material and the dimension parameters of the mold cavity.

9. The timing controller for starting control of a hot runner valve needle for injection molding according to claim 8, wherein: When the time parameter value of the third state relative to the sum of the time parameter value of the second state and the time parameter value of the third state is the null hypothesis ratio factor, and the time parameter value of the second state relative to the sum of the time parameter value of the second state and the time parameter value of the third state is the alternative hypothesis ratio factor, determination of the optimized ratio of the first startup time length and / or the second startup time length relative to the sum of the first startup time length and the first delay time length and / or the sum of the second startup time length and the second delay time length includes: calculating a common benchmark cross factor for representing the mutual strong correlation between the first startup time length and / or the second startup time length and the first delay time length and / or the second delay time length based on a common summation benchmark; calculating the strong correlation significance factor corresponding to the null hypothesis ratio factor under the common benchmark cross factor; and performing correlation reduction using the null hypothesis ratio factor and the strong correlation significance factor to obtain the optimized ratio.

10. A timing control method of a timing controller for starting control of a hot runner valve needle of an injection molding machine, comprising: A first working mode and a second working mode with the same injection signal start time are set, wherein, in the first working mode, the start delay of the valve needle has a first delay time length, and the start time period of the valve needle has a first start time length, and in the second working mode, the start delay of the valve needle has a second delay time length, and the start time period of the valve needle has a second start time length; the first delay time length is set to be greater than the second delay time length and the first start time length is greater than the second start time length, or the first delay time length is less than the second delay time length and the first start time length is less than the second start time length; and in the first working mode and the second working mode, the timing state control of the timing controller is realized by a state machine, and the state machine includes: a first state in which the injection signal, the delay signal and the start signal are all low level, a second state in which the injection signal and the delay signal are high level and the start signal is low level, a third state in which the injection signal is high level, the delay signal is low level and the start signal is high level, and a fourth state in which the injection signal is high level, and the delay signal and the start signal are low level.

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