A timing controller for injection molding hot runner valve pin activation control and method thereof

Abstract

A timing controller for hot runner valve pin activation control of injection molding and a method thereof are provided. The timing controller comprises: a first working mode and a second working mode with the same injection signal on time, wherein the first delay time length is greater than the second delay time length and the first activation time length is greater than the second activation time length, or the first delay time length is less than the second delay time length and the first activation time length is less than the second activation time length; wherein in the first working mode and the second working mode, timing state control is implemented by a state machine, the state machine comprising a first state, a second state, a third state and a fourth state based on the high and low levels of the injection signal, the delay signal and the on signal. In this way, by the state machine managing the delay time and the activation time of the proportional lengthening / shortening of the valve pin on in different working modes, precise timing control of the valve pin activation of the injection molding machine can be achieved.

Description

Technical Field

[0001] This application relates to the field of injection molding machine technology, and more specifically, to a timing controller and method for controlling the start-up of injection molding hot runner valve needles. Background Technology

[0002] An injection molding machine is a device used for molding thermoplastic or thermosetting plastics. It melts the plastic material by heating it and then injects the molten plastic into a mold under high pressure. After cooling and solidification, the desired product shape is obtained. It can be widely used in many industries such as automobiles, electronics, packaging, building materials, and medical.

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

[0004] The core of a needle valve hot runner injection molding machine lies in the valve needle controller, which precisely controls the opening and closing of the valve needle at each mold gate, achieving precise control over the flow of molten injection material into the mold cavity. Specifically, after each injection cycle, the valve needle closes, preventing further flow of injection material into the cavity; at the start of the next cycle, the valve needle reopens, allowing new molten injection material to enter. This not only enables simultaneous injection at multiple points but also effectively prevents premature solidification or overflow of the injection material. Therefore, a timing controller is needed to control the valve needle activation of the needle valve hot runner injection molding machine.

[0005] Therefore, there is a need to provide a timing controller solution that can achieve more precise start-up control of injection molding hot runner valve needles. Summary of the Invention

[0006] This application provides a timing controller and method for controlling the start-up of valve needles in injection molding hot runners. It achieves precise timing control of valve needle start-up by managing the proportionally extended / shortened delay time and start-up time of valve needle opening under different working modes through a state machine.

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

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

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

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

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

[0012] In the aforementioned timing controller for the activation control of injection molding hot runner valve needles, the state machine further includes the following state transition paths: from the fourth state to the third state, from the fourth state to the second state, and from the third state to the second state.

[0013] In the timing controller described above for the start-up control of injection molding hot runner valve needles, 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 timing controller described above for the start-up control of the injection hot runner valve needle, the first start-up time length and / or the second start-up time length are set based on the combined influencing factors including the injection speed of the injection material, the flow characteristics of the injection material, and the dimensional parameters of the mold cavity.

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

[0016] According to another aspect of this application, a timing control method for a timing controller for initiation control of a valve needle in injection molding hot runner is provided, comprising: setting a first operating mode and a second operating mode having the same injection signal start time, wherein, in the first operating mode, the initiation delay of the valve needle has a first delay time length, and the initiation time period of the valve needle has a first initiation time length, and in the second operating mode, the initiation delay of the valve needle has a second delay time length, and the initiation time period of the valve needle has a second initiation time length; setting the first delay time length to be greater than the second delay time length and the first initiation time length to be greater than the second initiation 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 implemented by a state machine, the state machine including: a first state in which the injection signal, the delay signal and the start signal are all at low level; a second state in which the injection signal and the delay signal are at high level and the start signal is at low level; a third state in which the injection signal is at high level, the delay signal is at low level and the start signal is at high level; and a fourth state in which the injection signal is at high level and the delay signal and the start signal are at low level.

[0017] The timing controller and method for starting the valve needle of the injection molding hot runner provided in this application embodiment can manage the valve needle opening delay time and start time that are proportionally extended / shortened under different working modes through a state machine, thereby achieving precise timing control of the valve needle starting of the injection molding machine. Attached Figure Description

[0018] Various other advantages and benefits of this application will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

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

[0020] Figure 2 The figure shows a schematic diagram of the state machine implementation of a timing controller for injection molding hot runner valve needle start control according to an embodiment of this application.

[0021] Figure 3 The figure shows a schematic timing diagram of the multi-stage valve needle opening of a timing controller for valve needle activation control in injection molding hot runners according to an embodiment of the present application. Detailed Implementation

[0022] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0023] When controlling the valve needle activation of a needle valve type hot runner injection molding machine using a timing controller, the timing controller needs to detect the injection signal from the injection molding machine and adjust actions such as closing the valve needle at different times according to the customer's mold injection requirements, accurately opening and closing the valve needle of the pneumatic or hydraulic needle valve nozzle. In other words, the timing controller needs to receive injection signals from the injection molding machine itself or other external systems to start the workflow, and delay the opening and closing times of the valve needle based on the delay signal by setting a delay time. Furthermore, it also needs to control the opening and closing of the valve needle through open or close signals.

[0024] The timing controller's operation during its main working period relies on the injection signal. Once an injection signal is received, indicating that injection material is about to flow in, the valve needle needs to be opened, causing the mold cavity to enter the gate open state. After the injection signal stops, the valve needle needs to be closed, causing the mold cavity to enter the gate closed state.

[0025] A key function of the timing controller for controlling the activation of the hot runner valve needle in injection molding, according to embodiments of this application, is to set a delay time for controlling the opening of the valve needle. Here, the delay time refers to the time interval between the timing controller receiving the injection signal and the valve needle opening. 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 opens too early and the molten injection material has not yet reached the valve needle position, it will lead to empty injection, and not enough injection material will enter the mold cavity, resulting in insufficient filling. On the other hand, it can prevent overflow. That is, if the valve needle opens too late and the molten injection material has already reached the valve needle position and started to accumulate, it may lead to overflow or unnecessary pressure buildup.

[0027] Furthermore, by setting an appropriate delay time, injection speed and pressure can be controlled, achieving smooth injection and optimized flow. In other words, by setting a suitable delay time, the molten injection material enters the mold cavity under stable conditions, avoiding pressure fluctuations caused by sudden valve needle opening, 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, an appropriate delay time ensures uniform filling of the mold cavity, avoiding localized underfilling or overfilling, and reducing the occurrence of defects such as bubbles.

[0028] In actual setup, the delay time can be initially set based on parameters such as the injection speed of the injection molding machine, the flow characteristics of the molten injection material, and the distance between the mold cavities. This initial range can then be gradually adjusted through actual production and testing. For example, in the timing controller for controlling the start-up of the injection hot runner valve needle according to an embodiment of this application.

[0029] Furthermore, in actual production and testing, 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 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, an excessively long valve needle opening time will cause too much molten injection material to enter the cavity, resulting in overflow or overfilling. On the other hand, an excessively short valve needle opening time will cause the molten injection material to fail to completely fill the cavity, resulting in insufficient filling. Therefore, another major function of the timing controller for valve needle start control of injection hot runner according to the embodiments of this 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: injection temperature, i.e., the temperature of the molten injection material affects its fluidity, so it needs to be considered when adjusting the opening time; injection pressure, i.e., the injection pressure affects 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, i.e., different materials have different flow characteristics and cooling characteristics, so it needs to be considered when adjusting the opening time; and the volume of the mold cavity, etc.

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

[0032] Therefore, under the same working mode, it is necessary to ensure that the valve needle opening delay time and opening time of the timing controller for valve needle start control of injection molding hot runner according to the embodiments of this application are inversely proportional. That is, the shorter the opening time of the valve needle for injecting molten injection material, the longer the delay time should be set accordingly. Conversely, the longer the opening time of the valve needle for injecting molten injection material, the shorter the delay time should be set accordingly.

[0033] However, on the other hand, the timing controller for controlling the activation of the hot runner valve needle in injection molding according to the embodiments of this application is not applied to a single timing control mode. That is, for the above-mentioned determination of the injection speed of the injection material, the flow characteristics of the injection material, and the dimensional 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. Furthermore, by comparing the influencing factors of the valve needle opening delay time and opening time, including the injection speed of the injection material, the flow characteristics of the injection material, and the dimensional parameters of the mold cavity, which are all common factors affecting the valve needle opening delay time and opening time, there is a direct proportional relationship between the valve needle opening delay time and opening time in different modes. That is, the longer the opening time period of the valve needle for injecting molten injection material, the longer the delay time period should be set accordingly; conversely, the shorter the opening time period of the valve needle for injecting molten injection material, the shorter 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 embodiments of this application includes: a first operating mode and a second operating mode having the same injection signal start-up time, wherein, in the first operating mode, the valve needle start-up delay has a first delay time length, and the valve needle start-up time period has a first start-up time length; and, in the first operating mode, the valve needle start-up delay has a second delay time length, and the valve needle start-up time period 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 the timing controller for injection molding hot runner valve needle start-up control according to the embodiments of this 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-up time length has a first adjustable start-up time length and a third adjustable start-up time length, wherein the first adjustable delay time length is greater than the third adjustable delay time length and the first adjustable start-up time length is less than the third adjustable start-up time length, or the first adjustable delay time length is less than the third adjustable delay time length and the first adjustable start-up time length is greater than the third adjustable start-up time length.

[0036] Similarly, in the timing controller for injection molding hot runner valve needle start control according to the embodiments of this application, the second delay time length in the second operating 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 illustration shows schematic timing diagrams of two operating modes of a timing controller for initiation control of a hot runner valve pin in injection molding according to an embodiment of this application. Figure 1 As shown, the injection signal activation time is 10 seconds. In the first working mode, the first delay time is set to three seconds and the first start time is set to seven seconds. In the second working mode, the second delay time is set to two seconds and the second start time is set to five seconds.

[0038] Here, those skilled in the art will understand that if, under the same working mode, the injection signal opening time is set to ten seconds, and the delay time is changed from three seconds to two seconds, then the valve needle activation time should also be extended accordingly. However, the valve needle activation time can only be effectively set within eight seconds, because when the injection signal time ends, the timing controller should control the valve needle to close, thus ending the valve needle activation period, i.e., the valve needle stops working. Therefore, in this embodiment, the total length of the delay time plus the activation time in different working modes is set to be less than or equal to the injection signal opening time, thereby ensuring the continuity and stability of the injection molding process. That is, if the sum of the delay time and the activation time is greater than the injection signal opening time, an interruption may occur during the injection process. That is, before the injection signal closes, the valve needle has not completed its action, resulting in a discontinuous injection molding process, and it cannot be guaranteed that the valve needle has completed its opening and closing actions when the injection signal closes, causing the injection molding process to be unable to maintain synchronization and continuity.

[0039] Therefore, in the timing controller for injection molding hot runner valve needle start control according to the embodiments of this application, 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 opening time length of the injection signal.

[0040] In one example, the timing controller for injection molding hot runner valve needle start-up control according to embodiments of this application can easily set the delay time and start-up time under different working modes of the injection signal on-time by manual button operation. For example, in the case where only a mode setting button and an increase / decrease control button exist, one can first press the mode setting button once to select a different working mode by using the increase / decrease control button, then press the mode setting button once to set the delay time by using the increase / decrease control button, and finally press the mode setting button once to set the start-up time by using the increase / decrease control button.

[0041] However, for more precise control, and considering the timing control of multiple gates by the injection molding machine, it is necessary to ensure the synchronous stability of the timing control of multiple gates. The timing controller for injection molding hot runner valve needle activation control according to embodiments of this application can further perform timing control based on the signal states of the timing controller under different operating modes by using a state machine.

[0042] Specifically, regarding such as Figure 1The different operating modes shown include a first state where the injection signal, delay signal, and enable signal are all low; a second state where the injection signal and delay signal are high and the enable signal is low; a third state where the injection signal is high, the delay signal is low, and the enable signal is high; and a fourth state where the injection signal is high and the delay signal and enable signal are low.

[0043] In other words, in the timing controller for injection molding hot runner valve needle start-up control according to the embodiments of this application, the delay signal and the start-up signal may only be high when the injection signal is high. The high / low level patterns of the delay signal and the start-up signal are opposite; that is, when the delay signal is high, the start-up signal is low, and vice versa. Therefore, the state machine control implementation of the above timing controller only requires four states to perform timing control based on different operating modes, which can largely achieve high-performance timing control.

[0044] For example, in the embodiments of this application, the first state, the second state, the third state, and the fourth state can be referred to as the inactive state, the pending state, the active state, and the standby state, respectively. After setting the four states of the state machine, it is necessary to continue setting the state transition paths of the state machine.

[0045] Figure 2 The illustration shows a schematic diagram of the state machine implementation of a timing controller for injection molding hot runner valve needle activation control according to an embodiment of this application. Figure 2 As shown, for invalid, pending, valid, and standby states, according to Figure 1 The different operating modes of the timing control shown firstly have sequential state transition paths for invalid state, pending state, valid state and standby state. That is, state transition paths are set respectively from invalid state to pending state, from pending state to valid state, from valid state to standby state, and from standby state to invalid state.

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

[0047] Furthermore, the timing controller for hot runner valve needle activation control according to embodiments of this application has the condition that multiple valve needles are activated within the same injection signal activation time period, for example... Figure 3 The third and fourth operating modes are shown here. Figure 3The illustration shows a schematic timing diagram of multi-segment valve needle opening in a timing controller for hot runner valve needle activation control according to an embodiment of this application. Therefore, the state machine requires state transition paths from a standby state to an active state and from a standby state to a pending state. Of course, those skilled in the art will understand that when multi-segment valve needle opening control within the same injection signal activation period is not required, the state machine implementation according to the embodiment of this application does not require state transition paths from a standby state to an active state and from a standby state to a pending state.

[0048] Similarly, when the valve needles of the above multiple segments are open, the delay signal can also be immediately followed by the opening signal to close and start. Therefore, the state machine can also have a state transition path from a valid state to a pending state.

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

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

[0051] Furthermore, in the aforementioned timing controller for the activation control of injection molding hot runner valve needles, the state machine further includes the following state transition paths: from the fourth state to the third state, from the fourth state to the second state, and from the third state to the second state.

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

[0053] In one example, as described above, when the delay time is proportional to the opening time under different operating modes, it is possible to consider setting the time parameters of the unresolved 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. In actual operation, the opening time is first determined by factors such as the injection speed of the injection molding material, the flow characteristics of the injection molding material, and the dimensional parameters of the mold cavity. Then, based on the fact that the delay time has common influencing factors with the opening time, the sum of the opening time and the delay time can be used as a common summation benchmark, i.e., 1. The ratio factor of the opening time relative to the sum of the opening time and the delay time is taken as the null hypothesis, expressed as: Therefore, the ratio factor corresponding to the delay time is the alternative hypothesis, expressed as: .

[0054] Therefore, in order to achieve a strong correlation between the start time and the delay time based on the common summation benchmark 1, the common benchmark crossover factor can be calculated as follows: .

[0055] Therefore, under the common benchmark cross factor, the null hypothesis object, i.e., the strong correlation significance factor corresponding to the start time, is expressed as: .

[0056] Then, the predetermined ratio factor corresponding to the original assumed object is used. and the strongly correlated significance factor By performing correlation restoration, the desired combination ratio coefficient can be obtained. : .

[0057] In other words, since the delay time and the start time form a combined correlation with a common benchmark for common influencing factors under different working modes, the optimized combination can be found based on the significance of the influence by using the null hypothesis and alternative hypothesis for the strongly correlated coupled filling effect, thereby improving the accuracy of fixed proportion based on combined correlation.

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

[0059] Furthermore, through precise timing control of the timing controller for injection hot runner valve needle activation control according to the embodiments of this application, weld lines that cause defects on the surface of the molded product can be eliminated, or the position of weld lines on the product surface can be reset, thereby achieving the purpose of eliminating weld lines in the injection molded product and improving the quality of the molded product.

[0060] Furthermore, in another example, a timing control method for a timing controller for initiation control of a hot runner valve needle in injection molding is provided, comprising: setting a first operating mode and a second operating mode having the same injection signal start time, wherein, in the first operating mode, the initiation delay of the valve needle has a first delay time length, and the initiation time period of the valve needle has a first initiation time length, and in the second operating mode, the initiation delay of the valve needle has a second delay time length, and the initiation time period of the valve needle has a second initiation time length; setting the first delay time length to be greater than the second delay time length and the first initiation time length to be greater than the second initiation 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 implemented by a state machine, the state machine including: a first state in which the injection signal, the delay signal and the start signal are all at low level; a second state in which the injection signal and the delay signal are at high level and the start signal is at low level; a third state in which the injection signal is at high level, the delay signal is at low level and the start signal is at high level; and a fourth state in which the injection signal is at high level and the delay signal and the start signal are at low level.

[0061] Here, those skilled in the art will understand that the details of the timing control method of the timing controller for injection molding hot runner valve needle start-up control described above have already been described in the previous description of the timing controller for injection molding hot runner valve needle start-up control according to the embodiments of this application, and will not be repeated here to avoid redundancy.

[0062] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0063] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0064] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

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

[0066] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A timing controller for controlling the start-up of a hot runner valve pin in injection molding, comprising: A first working mode and a second working mode having the same injection signal activation time, wherein, in the first working mode, the valve needle activation delay has a first delay time length and the valve needle activation time period has a first activation time length, and in the second working mode, the valve needle activation delay has a second delay time length and the valve needle activation time period has a second activation time length. Wherein, the first delay time length is greater than the second delay time length and the first startup time length is greater than the second startup time length, or the first delay time length is less than the second delay time length and the first startup time length is less than the second startup time length; In the first and second working modes, the timing state control of the timing controller is implemented by a state machine, which includes: a first state in which the injection signal, delay signal, and enable signal are all low; a second state in which the injection signal and delay signal are high and the enable signal is low; a third state in which the injection signal is high, the delay signal is low and the enable signal is high; and a fourth state in which the injection signal is high and the delay signal and the enable signal are low. The first start-up time length and / or the second start-up time length are set based on a combination of influencing factors, including the injection speed of the injection material, the flow characteristics of the injection material, and the dimensional parameters of the mold cavity. Wherein, when the sum of the time parameter values ​​of the third state and the second state is the original assumption ratio factor, and the sum of the time parameter values ​​of the second state and the third state is the alternative assumption 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: The common benchmark cross factor, representing the 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, is calculated and expressed as: ;in, This represents the null hypothesis ratio factor. Indicates the common benchmark cross factor; The strong correlation significance factor corresponding to the null hypothesis ratio factor under the common benchmark cross factor is calculated and expressed as: ;in, Indicates the factors of strong correlation significance; The optimized ratio is obtained by performing correlation reduction using the null hypothesis ratio factor and the strong correlation significance factor, and is expressed as follows: ;in, This indicates the optimization ratio.

2. The timing controller for injection molding hot runner valve needle start control as described in 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 startup time length is less than the third adjustable startup time length, or the first adjustable delay time length is less than the third adjustable delay time length and the first adjustable startup time length is greater than the third adjustable startup time length.

3. The timing controller for injection molding hot runner valve needle start control as described in 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 startup time length is less than the fourth adjustable startup time length, or the second adjustable delay time length is less than the fourth adjustable delay time length and the second adjustable startup time length is greater than the fourth adjustable startup time length.

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

5. The timing controller for injection molding hot runner valve needle start control as described in claim 4, wherein, The state machine includes the following state transition paths: from the first state to the second state, from the second state to the third state, from the third state to the fourth state, from the fourth state to the first state, and from the third state to the first state.

6. The timing controller for injection molding hot runner valve needle activation control as described in claim 5, wherein, The state machine further includes the following state transition paths: from the fourth state to the third state, from the fourth state to the second state, and from the third state to the second state.

7. The timing controller for injection molding hot runner valve needle activation control as described in claim 6, wherein, Overall timing control is achieved by directly setting the time parameters of the first state, the second state, the third state, and the fourth state.

8. A timing control method for a timing controller used for starting control of injection molding hot runner valve needles, comprising: A first working mode and a second working mode with the same injection signal activation time are set. In the first working mode, the valve needle activation delay has a first delay time length and the valve needle activation time period has a first activation time length. In the second working mode, the valve needle activation delay has a second delay time length and the valve needle activation time period has a second activation time length. The first delay time length is set to be greater than the second delay time length and the first startup time length is greater than the second startup time length; or, the first delay time length is less than the second delay time length and the first startup time length is less than the second startup time length; and In both the first and second working modes, the timing state control of the timing controller is implemented by a state machine. The state machine includes: a first state in which the injection signal, delay signal, and enable signal are all low; a second state in which the injection signal and delay signal are high and the enable signal is low; a third state in which the injection signal is high, the delay signal is low, and the enable signal is high; and a fourth state in which the injection signal is high and the delay signal and the enable signal are low. The first start-up time length and / or the second start-up time length are set based on a combination of influencing factors, including the injection speed of the injection material, the flow characteristics of the injection material, and the dimensional parameters of the mold cavity. Wherein, when the sum of the time parameter values ​​of the third state and the second state is the original assumption ratio factor, and the sum of the time parameter values ​​of the second state and the third state is the alternative assumption 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: The common benchmark cross factor, representing the 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, is calculated and expressed as: ;in, This represents the null hypothesis ratio factor. Indicates the common benchmark cross factor; The strong correlation significance factor corresponding to the null hypothesis ratio factor under the common benchmark cross factor is calculated and expressed as: ;in, Indicates the factors of strong correlation significance; The optimized ratio is obtained by performing correlation reduction using the null hypothesis ratio factor and the strong correlation significance factor, and is expressed as follows: ;in, This indicates the optimization ratio.

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