Valve needle induction control system

Abstract

The utility model relates to the technical field of hot runners, in particular to a valve needle induction control system which comprises a splitter plate, a hot nozzle is connected to the splitter plate, a valve needle is arranged between the splitter plate and the hot nozzle in a penetrating mode, and an air cylinder used for driving the valve needle to move is arranged on the splitter plate; the air cylinder comprises a cylinder body, a piston is arranged in the cylinder body, the valve needle is fixedly connected with the piston, and contact monitoring sensors are arranged at the positions, at the two axial ends of the piston, of the cylinder body. The mold has the advantages that the movement of the valve needle can be accurately sensed, an alarm is quickly given, the rejection rate is reduced, the raw material cost is saved, early warning is performed in advance, and mold damage caused by glue overflowing is effectively prevented.

Description

Technical Field

[0001] The present application relates to the technical field of hot runners, and in particular to a valve needle sensing control system. Background Art

[0002] Our company has developed and produced a corrosion-resistant needle valve system. This system consists of a nozzle body inserted into the mold cavity, with a valve needle inserted into the nozzle body. A special nozzle core is located at the end of the nozzle body, which defines a gate. The valve needle penetrates the gate and seals it. We have applied for a related patent, with the publication number being CN217670822U.

[0003] During the long-term production process, the inventors found that the valve needle often fails to seal with glue. Molding technicians are sometimes unable to make a judgment in the first time and need to notify the manufacturer to confirm the problem on site, resulting in a waste of manpower, material and financial resources. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a valve needle sensing control system, which has the advantages of accurately sensing valve needle movement, quickly alarming, reducing scrap rate, saving raw material costs, early warning, and effectively preventing mold damage caused by glue overflow.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0006] The valve needle induction control system includes a diverter plate, a hot nozzle is connected to the diverter plate, a valve needle is arranged between the diverter plate and the hot nozzle, and a cylinder for driving the valve needle to move is arranged on the diverter plate;

[0007] The cylinder comprises a cylinder body, a piston is arranged in the cylinder body, the valve needle is fixedly connected to the piston, and contact monitoring sensors are arranged on the cylinder body at both axial ends of the piston.

[0008] The above technical solution is implemented by driving the valve needle up and down in the hot nozzle through the air cylinder, thereby opening or blocking the hot nozzle, thereby achieving the effect of orderly glue injection; that is, the contact monitoring sensor monitors the valve needle following the piston downward. When the piston moves downward, the valve needle cannot move downward due to the blockage of the hot nozzle, and then the piston cannot contact the contact monitoring sensor below the piston, and the stroke in place signal cannot be transmitted, and a valve needle in place alarm can be issued. Or when moving upward, the hot nozzle is blocked and the valve needle cannot move upward, that is, the valve needle cannot move upward to open the hot nozzle, resulting in the hot nozzle being blocked and glue cannot be injected; and then the piston cannot contact the contact monitoring sensor above the piston, and the stroke in place signal cannot be transmitted, and a valve needle in place alarm can be issued. Therefore, there is no need for personnel to observe the product quality in the mold, and the valve needle blockage can be discovered at the early stage of blockage, thereby ensuring the quality of subsequent products.

[0009] As a preferred solution of the present application, a positioning countersunk hole for the valve needle to pass through is provided on the piston, and a pressing screw plug for pressing the valve needle into the positioning countersunk hole is threaded into the positioning countersunk hole.

[0010] By implementing the above technical solution, the valve needle can be detachably fixed on the piston. When the valve needle is worn out after long-term use and cannot normally seal the hot nozzle, it can be replaced to ensure the sealing effect.

[0011] As a preferred solution of the present application, an adjusting nut is threaded onto the valve needle, and the adjusting nut abuts against the step in the positioning counterbore.

[0012] By implementing the above technical solution, when the valve needle is slightly worn after long-term use, the position of the valve needle can be fine-tuned by adjusting the nut, thereby ensuring the sealing effect.

[0013] As a preferred solution of the present application, the contact monitoring sensor is electrically connected to a counter and an alarm.

[0014] To implement the above technical solution, the contact monitoring sensor is electrically connected to a counter and an alarm, which can accurately monitor abnormal time and connect to the injection signal to accurately sense the movement of the valve needle, quickly alarm, reduce the scrap rate, save raw material costs, and provide early warning, effectively preventing mold damage caused by glue overflow.

[0015] As a preferred solution of the present application, the contact monitoring sensor is configured as a contact counting sensor or a non-contact counting sensor.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] That is, the cylinder drives the valve needle to move up and down in the hot nozzle, thereby opening or blocking the hot nozzle, and then achieving the effect of orderly glue injection; that is, the contact monitoring sensor monitors the valve needle following the piston downward. When the piston moves downward, the valve needle cannot move downward due to the blockage of the hot nozzle, and then the piston cannot contact the contact monitoring sensor below the piston, and the stroke in place signal cannot be transmitted, and a valve needle in place alarm can be issued. Or when moving upward, the hot nozzle is blocked and the valve needle cannot move upward, that is, the valve needle cannot move upward to open the hot nozzle, resulting in the blockage of the hot nozzle and the inability to inject glue; and then the piston cannot contact the contact monitoring sensor above the piston, and the stroke in place signal cannot be transmitted, and a valve needle in place alarm can be issued. Therefore, there is no need for personnel to observe the product quality in the mold, and the valve needle blockage can be discovered at the early stage of blockage, thereby ensuring the quality of subsequent products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of the cylinder structure of an embodiment of the present application.

[0022] Figure numerals: 1, manifold; 2, hot nozzle; 3, valve needle; 4, cylinder; 41, cylinder body; 42, piston; 43, contact monitoring sensor; 44, tightening screw plug; 45, adjusting nut. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-3 This application is described in further detail.

[0024] The embodiment of the present application discloses a valve needle 3 sensing control system. Figure 1 The valve needle 3 sensing control system includes a manifold 1, to which a hot nozzle 2 is connected. A valve needle 3 is disposed between the manifold 1 and the hot nozzle 2. The manifold 1 is provided with a cylinder 4 for driving the valve needle 3. The cylinder 4 drives the valve needle 3 up and down in the hot nozzle 2, thereby opening or closing the hot nozzle 2 and achieving an orderly injection effect.

[0025] The cylinder 4 includes a cylinder body 41, in which a piston 42 is provided. The valve needle 3 is fixedly connected to the piston 42. Contact monitoring sensors 43 are provided on the cylinder body 41 at both axial ends of the piston 42. That is, the contact monitoring sensors 43 monitor the valve needle 3 following the piston 42 downward movement. When the piston 42 moves downward, the valve needle 3 cannot move downward due to the blockage of the hot nozzle 2, which in turn causes the piston 42 to be unable to contact the contact monitoring sensor 43 below the piston 42 and unable to transmit the stroke in-place signal, thereby issuing a valve needle 3 in-place alarm. Alternatively, when moving upward, the hot nozzle 2 is blocked, causing the valve needle 3 to be unable to move upward, that is, the valve needle 3 cannot move upward to open the hot nozzle 2, resulting in the hot nozzle 2 being blocked and unable to inject glue. This in turn causes the piston 42 to be unable to contact the contact monitoring sensor 43 above the piston 42 and unable to transmit the stroke in-place signal, thereby issuing a valve needle 3 in-place alarm. This allows the valve needle 3 to be detected in the early stages of blockage without the need for personnel to observe the product quality in the mold, thereby ensuring the quality of subsequent products.

[0026] The contact monitoring sensor 43 is configured as a contact counting sensor or a non-contact counting sensor. Specifically, it can be a pressure sensor or a photoelectric sensor to ensure test stability. The contact monitoring sensor is electrically connected to a counter and alarm, accurately monitoring abnormality events. Connected to the injection signal, it can precisely sense the movement of the valve needle 3 and quickly generate an alarm, reducing scrap rates, saving raw material costs, and providing early warning, effectively preventing mold damage caused by glue overflow.

[0027] The piston 42 is provided with a positioning counterbore for the valve needle 3 to pass through. A compression screw 44 is threaded into the positioning counterbore, which is used to press the valve needle 3 into the positioning counterbore. This allows the valve needle 3 to be removably fixed to the piston 42. If the valve needle 3 wears out after long-term use and cannot properly seal the hot nozzle 2, it can be replaced to ensure the sealing effect. An adjusting nut 45 is threaded onto the valve needle 3. The adjusting nut 45 abuts against the step in the positioning counterbore. This allows the position of the valve needle 3 to be fine-tuned by adjusting the nut 45 to ensure the sealing effect if the valve needle 3 wears slightly after long-term use.

[0028] The implementation principle of the valve needle 3 sensing control system of the embodiment of the present application is as follows: the valve needle 3 is driven by the cylinder 4 to move up and down in the hot nozzle 2, thereby opening or blocking the hot nozzle 2, and thus achieving the effect of orderly glue injection; that is, the contact monitoring sensor 43 monitors the valve needle 3 following the piston 42 downward movement. When the piston 42 moves downward, the valve needle 3 cannot move downward due to the blockage of the hot nozzle 2, and then the piston 42 cannot contact the contact monitoring sensor 43 below the piston 42, and the stroke in-place signal cannot be transmitted, and a valve needle 3 in-place alarm is issued. Or when moving upward, the hot nozzle 2 is blocked, causing the valve needle 3 to be unable to move upward, that is, the valve needle 3 cannot move upward to open the hot nozzle 2, resulting in the occurrence of the hot nozzle 2 being blocked and glue injection being impossible; and then the piston 42 cannot contact the contact monitoring sensor 43 above the piston 42, and the stroke in-place signal cannot be transmitted, and a valve needle 3 in-place alarm is issued. Therefore, the occurrence of valve needle 3 blockage can be detected at the early stage of blockage without the need for personnel to observe the product quality in the mold, thereby ensuring the quality of subsequent products.

[0029] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. Valve needle induction control system, characterized by: The invention comprises a diverter plate (1), a hot nozzle (2) is connected to the diverter plate (1), a valve needle (3) is arranged between the diverter plate (1) and the hot nozzle (2), and a cylinder (4) is arranged on the diverter plate (1) for driving the valve needle (3) to move; The cylinder (4) comprises a cylinder body (41), a piston (42) is arranged in the cylinder body (41), the valve needle (3) is fixedly connected to the piston (42), and contact monitoring sensors (43) are arranged on the cylinder body (41) at both axial ends of the piston (42).

2. The valve needle sensing control system according to claim 1, characterized in that: The piston (42) is provided with a positioning counterbore for the valve needle (3) to pass through, and a pressing screw plug (44) for pressing the valve needle (3) into the positioning counterbore is screwed into the positioning counterbore.

3. The valve needle sensing control system according to claim 1, characterized in that: An adjusting nut (45) is threaded onto the valve needle (3), and the adjusting nut (45) abuts against a step in the positioning counterbore.

4. The valve needle sensing control system according to claim 1, characterized in that: The contact monitoring sensor is electrically connected to a counter and an alarm.

5. The valve needle sensing control system according to claim 1, characterized in that: The contact monitoring sensor (43) is configured as a contact counting sensor or a non-contact counting sensor.

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