CN216941724U - Needle valve control system based on injection molding machine - Google Patents
Needle valve control system based on injection molding machine Download PDFInfo
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- CN216941724U CN216941724U CN202122499838.8U CN202122499838U CN216941724U CN 216941724 U CN216941724 U CN 216941724U CN 202122499838 U CN202122499838 U CN 202122499838U CN 216941724 U CN216941724 U CN 216941724U
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Abstract
The utility model discloses a needle valve control system based on an injection molding machine, which relates to the field of injection molding machines and comprises the following components: the needle valve control module comprises a needle valve injection control unit and a needle valve pressure maintaining control unit; the mould cavity modules are provided, and each mould cavity is correspondingly provided with a needle valve control module; the real-time detection module comprises a plurality of pressure sensors, and one pressure sensor is correspondingly arranged in one mold cavity so as to obtain analog quantity signals of each mold cavity in a feeding process in real time; the control module is used for obtaining the actual die cavity pressure of each die cavity according to the analog quantity signal, feeding back a control signal to the needle valve control module when the actual die cavity pressure of each die cavity reaches a preset reference threshold value, and opening the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity, so that the problem that the weight of a plastic part in each die cavity is different due to the fact that the needle valve is controlled to be opened and closed only by setting the position of a screw or the injection time at present is solved.
Description
Technical Field
The utility model relates to the technical field of injection molding machines, in particular to a needle valve control system based on an injection molding machine.
Background
At present, aiming at a multi-cavity mold, products are the same, the weight and the size need to be consistent, the working principle of an injection molding machine is similar to that of an injection syringe for injection, and the injection molding machine is a technological process of injecting plastic in a plasticized molten state (namely a viscous state) into a closed mold cavity by means of the thrust of a screw (or a plunger), and obtaining a product after solidification and shaping. During the injection process, the needle valve is controlled to be opened and closed only according to the position or time of the screw rod. For this type of mold (multi-cavity mold), the opening and closing of the needle valve can only be controlled by setting the screw position and time parameters of each cavity through the experience of the pilot so as to make the weight and size of the plastic part in each cavity as the same as possible.
Disclosure of Invention
In order to solve the problem that the weight of a plastic part in each mold cavity is different due to the fact that the opening and the closing of a needle valve are controlled only by setting the position of a screw or the injection time, the utility model provides a needle valve control system based on an injection molding machine, which comprises:
the needle valve control module comprises a needle valve injection control unit and a needle valve pressure maintaining control unit, the needle valve injection control unit is used for opening or closing feeding of the mold cavity, and the needle valve pressure maintaining control unit is used for opening or closing pressure maintaining of the mold cavity;
the mould cavity module comprises a plurality of mould cavities, each mould cavity is correspondingly provided with a needle valve control module, and the mould cavities are used for forming a product according to injected feeding after a needle valve injection control unit is opened;
the real-time detection module comprises a plurality of pressure sensors, and one pressure sensor is correspondingly arranged in one mold cavity so as to obtain analog quantity signals of each mold cavity in the feeding process in real time and send the analog quantity signals to the control module;
and the control module is used for acquiring the actual die cavity pressure of each die cavity according to the analog quantity signal, closing the needle valve injection control unit corresponding to the die cavity to stop feeding when the actual die cavity pressure reaches a preset reference threshold value, and feeding back a control signal to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity when the actual die cavity pressure of each die cavity reaches the preset reference threshold value.
Preferably, the system further comprises:
and the reference module is used for setting a preset reference threshold value for converting injection into pressure maintaining, namely closing the corresponding needle valve injection control unit to stop feeding when the actual die cavity pressure reaches the preset reference threshold value.
Preferably, the control module further comprises:
and the conversion unit is used for converting the analog quantity signal into the actual die cavity pressure.
Preferably, the real-time detection module and the control module communicate data by means of an I/O point.
Preferably, the pressure sensor is a hall sensor.
Preferably, the system further comprises:
and the touch display screen is used for displaying the actual die cavity pressure of each die cavity detected by the real-time detection module, and the actual feeding time and the actual pressure maintaining time of the die cavities.
Compared with the prior art, the utility model has at least the following beneficial effects:
(1) according to the utility model, the pressure sensors are arranged in the mould cavities, and the actual mould cavity pressure of each mould cavity in the feeding process is obtained in real time, so that the on-off state of the corresponding needle valve injection control unit is accurately controlled, and the injection is stopped at any time, therefore, the problem that the plastic part weight in each mould cavity is different due to the fact that the opening and closing of the needle valve are controlled only by setting the screw position or the injection time at present is solved;
(2) according to the utility model, the preset reference threshold value of the pressure maintaining is scientifically set by the reference module, and when the actual die cavity pressure of each die cavity reaches the preset reference threshold value, a control signal is fed back to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity, so that the actual die cavity pressure of each die cavity is judged in real time, and when the actual die cavity pressure of each die cavity is completely consistent, the pressure maintaining is simultaneously carried out.
Drawings
Fig. 1 is a system configuration diagram of a needle valve control system based on an injection molding machine.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example one
In order to solve the problem that the difference of the weights of the plastic parts in each mold cavity is caused by only setting the screw position or the injection time to control the opening and closing of the needle valve, as shown in fig. 1, the utility model provides a needle valve control system based on an injection molding machine, which comprises:
the needle valve control module comprises a needle valve injection control unit and a needle valve pressure maintaining control unit, the needle valve injection control unit is used for opening or closing the feeding of the mold cavity, and the needle valve pressure maintaining control unit is used for opening or closing the pressure maintaining of the mold cavity;
the mould cavity module comprises a plurality of mould cavities, each mould cavity is correspondingly provided with a needle valve control module, and the mould cavities are used for forming a product according to injected feeding after a needle valve injection control unit is opened;
the real-time detection module comprises a plurality of pressure sensors, and one pressure sensor is correspondingly arranged in one mold cavity so as to obtain analog quantity signals of each mold cavity in the feeding process in real time and send the analog quantity signals to the control module;
according to the utility model, the pressure sensors are arranged in the mould cavities, and the actual mould cavity pressure of each mould cavity in the feeding process is obtained in real time, so that the on-off state of the corresponding needle valve injection control unit is accurately controlled, and the injection is stopped at any time, and therefore, the problem that the weight of the plastic part in each mould cavity is different due to the fact that the opening and closing of the needle valve are controlled only by setting the position of a screw or the injection time at present is solved.
And the control module is used for acquiring the actual die cavity pressure of each die cavity according to the analog quantity signal, closing the needle valve injection control unit corresponding to the die cavity to stop feeding when the actual die cavity pressure reaches a preset reference threshold value, and feeding back a control signal to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity when the actual die cavity pressure of each die cavity reaches the preset reference threshold value.
It should be noted that when the actual cavity pressure of each mold cavity has reached the preset reference threshold, a control signal is fed back to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each mold cavity, that is, the injection molding stage is changed into the pressure maintaining stage.
In this embodiment, a mold having four cavities (a/B/C/D) is explained, each cavity corresponds to the same product, a pressure sensor is installed in each cavity, and each cavity is controlled by a needle valve (i.e., a needle valve control module). Assuming that the pressure maintaining can be started only when the die cavity D reaches 80bar (the 80bar is a preset reference threshold), the time for the die cavity A/B/C/D to reach 80bar is expected to be 3s/4s/5s/6s respectively. When the cavity A/B/C reaches 80bar, the needle valve injection control units corresponding to the cavity A/B/C are respectively closed (not injected), and when the cavity D reaches 80bar, the needle valve pressure maintaining control units corresponding to all the cavities are simultaneously opened, and the injection molding machine starts to maintain pressure.
The system further comprises:
and the reference module is used for setting a preset reference threshold value for converting injection into pressure maintaining, namely closing the corresponding needle valve injection control unit to stop feeding when the actual die cavity pressure reaches the preset reference threshold value.
The control module further comprises:
and the conversion unit is used for converting the analog quantity signal into the actual die cavity pressure.
And the real-time detection module and the control module are communicated with each other in a mode of I/O points.
The pressure sensor adopts a Hall sensor.
The system further comprises:
and the touch display screen is used for displaying the actual die cavity pressure of each die cavity detected by the real-time detection module, and the actual feeding time and the actual pressure maintaining time of the die cavities.
According to the utility model, the preset reference threshold value of the pressure maintaining is scientifically set by the reference module, and when the actual die cavity pressure of each die cavity reaches the preset reference threshold value, a control signal is fed back to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity, so that the actual die cavity pressure of each die cavity is judged in real time, and when the actual die cavity pressure of each die cavity is completely consistent, the pressure maintaining is simultaneously carried out.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Claims (6)
1. The utility model provides a needle valve control system based on injection molding machine which characterized in that includes:
the needle valve control module comprises a needle valve injection control unit and a needle valve pressure maintaining control unit, the needle valve injection control unit is used for opening or closing feeding of the mold cavity, and the needle valve pressure maintaining control unit is used for opening or closing pressure maintaining of the mold cavity;
the mould cavity module comprises a plurality of mould cavities, each mould cavity is correspondingly provided with a needle valve control module, and the mould cavities are used for forming a product according to injected feeding after a needle valve injection control unit is opened;
the real-time detection module comprises a plurality of pressure sensors, and one pressure sensor is correspondingly arranged in one mold cavity so as to obtain analog quantity signals of each mold cavity in the feeding process in real time and send the analog quantity signals to the control module;
and the control module is used for acquiring the actual die cavity pressure of each die cavity according to the analog quantity signal, closing the needle valve injection control unit corresponding to the die cavity to stop feeding when the actual die cavity pressure reaches a preset reference threshold value, and feeding back a control signal to the needle valve control module to open the needle valve pressure maintaining control unit to simultaneously maintain the pressure of each die cavity when the actual die cavity pressure of each die cavity reaches the preset reference threshold value.
2. The needle valve control system of an injection molding machine, as claimed in claim 1, further comprising:
and the reference module is used for setting a preset reference threshold value for converting injection into pressure maintaining, namely closing the corresponding needle valve injection control unit to stop feeding when the actual die cavity pressure reaches the preset reference threshold value.
3. The needle valve control system of an injection molding machine according to claim 1, wherein the control module further comprises:
and the conversion unit is used for converting the analog quantity signal into the actual die cavity pressure.
4. The needle valve control system based on the injection molding machine as claimed in claim 3, wherein the real-time detection module and the control module communicate data by means of I/O points.
5. The injection molding machine-based needle valve control system of claim 1, wherein the pressure sensor is a hall sensor.
6. The needle valve control system of an injection molding machine, as claimed in claim 1, further comprising:
and the touch display screen is used for displaying the actual die cavity pressure of each die cavity detected by the real-time detection module, and the actual feeding time and the actual pressure maintaining time of the die cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202122499838.8U CN216941724U (en) | 2021-10-18 | 2021-10-18 | Needle valve control system based on injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122499838.8U CN216941724U (en) | 2021-10-18 | 2021-10-18 | Needle valve control system based on injection molding machine |
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| CN216941724U true CN216941724U (en) | 2022-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117400500A (en) * | 2023-11-16 | 2024-01-16 | 广东优铸精密机械股份有限公司 | Injection control system of double-color-cleaning injection molding machine |
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2021
- 2021-10-18 CN CN202122499838.8U patent/CN216941724U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117400500A (en) * | 2023-11-16 | 2024-01-16 | 广东优铸精密机械股份有限公司 | Injection control system of double-color-cleaning injection molding machine |
| CN117400500B (en) * | 2023-11-16 | 2024-05-17 | 广东优铸精密机械股份有限公司 | Injection control system of double-color-cleaning injection molding machine |
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