Four-point needle valve glue inlet hot runner system

Abstract

The utility model provides a four-point type needle valve glue inlet hot runner system which comprises a main hot runner, a splitter plate and four needle valve hot runners installed in the splitter plate, and a positioning sleeve fixedly connected with the splitter plate through a fixing screw is installed in the center of the surface of the splitter plate. The main hot runner is fixedly installed in the positioning sleeve, the top of the main hot runner is communicated with an injection molding opening used for glue feeding, the main hot runner is communicated with the interior of the splitter plate, the bottom of the main hot runner penetrates through the positioning sleeve to the position below the splitter plate, and the four needle valve hot runners comprise nozzles arranged at the bottoms of the four needle valve hot runners. The four nozzles are located below the splitter plate, valve needles are arranged in the four needle valve hot runners, each valve needle comprises a needle head arranged at the bottom of the valve needle, and the needle heads can move to be connected with the corresponding nozzles in an abutting mode. The injection molding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner system field especially four point formula needle valve glue feeding hot runner system. BACKGROUND

[0002] The glue feeding hot runner is a kind of hot runner system used in the plastic injection molding process.It is sent into mould by heating channel to realize the rapid flow and filling of plastic.

[0003] The Chinese patent with disclosure number CN211105372U discloses an economic compact single-point valve needle hot runner system, and the hot runner injection molding system is simple in structure, but it can only produce one injection molding product at a time, resulting in low production efficiency.

[0004] Based on the above reasons, it is necessary to provide a needle valve glue feeding hot runner system that can produce multiple injection molding products at a time. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to solve the problem of low efficiency of single injection molding product in the prior art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] The four-point needle valve glue feeding hot runner system includes a total hot runner, a distribution plate and four needle valve hot runners vertically installed in the distribution plate, a positioning sleeve is fixedly connected to the center position of the upper surface of the distribution plate by a fixing screw, the total hot runner is fixedly installed in the positioning sleeve, the top of the total hot runner is communicated with an injection port for glue feeding, the total hot runner is communicated with the inside of the distribution plate, the bottom of the total hot runner penetrates through the positioning sleeve to the lower side of the distribution plate, the four needle valve hot runners include nozzles arranged at the bottom thereof, the four nozzles are located below the distribution plate, valve needles are arranged in the four needle valve hot runners, the valve needles each include a needle head arranged at the bottom thereof, and the needle head is movable to abuttingly connect with the corresponding nozzle.

[0008] As a preferred scheme of the four-point needle valve glue feeding hot runner system, the surface of the positioning sleeve is provided with a first temperature sensor for detecting the temperature of the total hot runner.

[0009] As a preferred scheme of the four-point needle valve glue feeding hot runner system, the surface of the first temperature sensor is sleeved with a fixing ring, a fixing hole is arranged between the surface of the first temperature sensor and the fixing ring, and a first heat transfer rod for heat transfer to the total hot runner is fixedly placed in the fixing hole.

[0010] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the upper and lower ends of the side wall of the flow distribution plate are provided with second temperature sensors for detecting the temperature of the flow distribution plate.

[0011] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the upper surface of the flow distribution plate close to the second temperature sensor is provided with a concave groove, and a second heat transfer rod for heat transfer to the flow distribution plate is installed in the concave groove, and the bottom of the second heat transfer rod extends into the flow distribution plate.

[0012] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the bottom of the four needle valve hot runners close to the flow distribution plate is provided with a third temperature sensor for detecting the temperature of the corresponding needle valve hot runner.

[0013] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the four needle valve hot runners are provided with heating wires for heat transfer to the corresponding nozzles.

[0014] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the surface of the four third temperature sensors is sleeved with a first sleeve ring, a threading hole is arranged between the first sleeve ring and the outer peripheral surface of the corresponding third temperature sensor, a guide hole is formed at the position where the four needle valve hot runners are attached to the bottom of the flow distribution plate, a wire groove is arranged at the position close to the nozzle at the bottom end of the four needle valve hot runners, a second sleeve ring is sleeved with the outer periphery of the bottom end of the four needle valve hot runners, a wire hole is arranged between the second sleeve ring and the outer periphery of the bottom end of the corresponding needle valve hot runner, and the heating wire sequentially passes through the corresponding threading hole, guide hole, wire hole and wire groove into the needle valve hot runner and close to the nozzle.

[0015] As the preferred scheme of the four-point needle valve glue feeding hot runner system, the four needle valve hot runners are provided with limiting blocks for limiting the valve needle, and the limiting blocks are located on both sides of the valve needle body.

[0016] Compared with the prior art, the utility model at least will have following beneficial effect:

[0017] The four-point needle valve hot runner system can inject multiple products at a time, and the injection molding efficiency is improved; 2. When the valve needle moves to the nozzle direction and the needle head abuts against the nozzle, the needle head can block the gate of the injection mold, the glue injection to the gate can be stopped, and the glue at the gate position will not backflow, effectively reducing the waste of glue; 3. The arrangement of the first heat transfer rod, the second heat transfer rod and the heating wire can ensure that the glue is smoothly injected from the nozzle into the gate of the injection mold. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only exemplary embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0019] Fig. 1 It is a structure diagram of the four-point needle valve glue feeding hot runner system of the present application.

[0020] Fig. 2 It is a sectional view of the four-point needle valve glue feeding hot runner system of the present application.

[0021] The reference signs include:

[0022] 1, total hot runner; 2, flow divider; 3, needle valve hot runner; 4, injection port; 5, positioning sleeve; 6, fixing screw; 7, nozzle; 8, valve needle; 9, needle head; 10, first temperature sensor; 11, fixing ring; 12, fixing hole; 13, first heat transfer rod; 14, second temperature sensor; 15, concave groove; 16, second heat transfer rod; 17, third temperature sensor; 18, heating wire; 19, first sleeve ring; 20, threading hole; 21, guide hole; 22, wire slot; 23, second sleeve ring; 24, wire hole; 25, limiting block. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only exemplary embodiments of the present application, not the only embodiments.

[0024] As Figs. 1-2As shown, the four-point needle valve glue feeding hot runner system comprises a total hot runner 1, a distribution plate 2 and four needle valve hot runners 3 vertically installed in the distribution plate 2, a positioning sleeve 5 fixedly connected with the distribution plate 2 by a fixing screw 6 is installed at the center position of the upper surface of the distribution plate 2, the total hot runner 1 is fixedly installed in the positioning sleeve 5, the top of the total hot runner 1 is communicated with an injection port 4 for feeding glue, the total hot runner 1 is communicated with the inside of the distribution plate 2, the bottom of the total hot runner 1 penetrates through the positioning sleeve 5 to the lower side of the distribution plate 2, the four needle valve hot runners 3 comprise nozzles 7 arranged at the bottom thereof, in actual use, the nozzles 7 are abuttingly connected with the gates on the front mold cores of the injection mold, so that the glue is injected into the gates from the nozzles 7 and then into the cavity of the injection mold to complete the injection molding process, the four nozzles 7 are located below the distribution plate 2, the four needle valve hot runners 3 are each provided with a valve needle 8 controlled by an external connector, the four valve needles 8 each comprise a needle head 9 arranged at the bottom thereof, the needle head 9 is movable to abuttingly connect with the corresponding nozzle 7, the connector controls the opening and closing of the valve needle 8, when it is needed to stop injecting glue into the cavity of the injection mold, the connector starts the valve needle 8, the valve needle 8 moves towards the nozzle 7, when the needle head 9 abuts against the nozzle 7, the needle head 9 can block the gate of the injection mold, the glue injection action is stopped, and the glue at the gate position will not flow back, thereby effectively reducing the waste of glue.

[0025] A first temperature sensor 10 for detecting the temperature of the total hot runner 1 is arranged on the surface of the positioning sleeve 5.

[0026] A fixing ring 11 is sleeved on the surface of the first temperature sensor 10, a fixing hole 12 is arranged between the fixing ring 11 and the surface of the first temperature sensor 10, and a first heat transfer rod 13 for transferring heat to the total hot runner 1 is fixedly arranged in the fixing hole 12.

[0027] A second temperature sensor 14 for detecting the temperature of the distribution plate 2 is installed side by side on the upper and lower ends of the side wall of the distribution plate 2.

[0028] A concave groove 15 is arranged on the upper surface of the distribution plate 2 close to the second temperature sensor 14, a second heat transfer rod 16 for transferring heat to the distribution plate 2 is arranged in the concave groove 15, and the bottom of the second heat transfer rod 16 extends into the distribution plate 2.

[0029] A third temperature sensor 17 for detecting the temperature of the corresponding needle valve hot runner 3 is arranged at the bottom position of each of the four needle valve hot runners 3.

[0030] A heating wire 18 for transferring heat to the corresponding nozzle 7 is arranged in each of the four needle valve hot runners 3.

[0031] The first sleeve ring 19 is sleeved on the outer periphery of each third temperature sensor 17, and a threading hole 20 is arranged between the first sleeve ring 19 and the outer periphery of the corresponding third temperature sensor 17. A guide hole 21 is arranged at the position where the four needle valve hot runners 3 are attached to the bottom of the distribution plate 2. A wire slot 22 is arranged at the position where the bottom end of each needle valve hot runner 3 is close to the nozzle 7. A second sleeve ring 23 is sleeved on the outer periphery of the bottom end of each needle valve hot runner 3, and a wire hole 24 is arranged between the second sleeve ring 23 and the outer periphery of the bottom end of the corresponding needle valve hot runner 3. The heating wire 18 sequentially passes through the corresponding threading hole 20, guide hole 21, wire hole 24, and wire slot 22, and then enters the needle valve hot runner 3 and is close to the nozzle 7. It should be noted that the arrangement of the guide hole 21 and the wire slot 22 will not cause the material to overflow from the needle valve hot runner 3, because these two are the wire passing path of the heating wire 18, and the purpose is to facilitate the heating of the nozzle 7 by the heating wire 18.

[0032] Further, two second sleeve rings 23 can be sleeved on the outer periphery of the bottom end of the four needle valve hot runners 3, and two wire holes 24 can be arranged correspondingly. In this way, the heating wire 18 can be stably arranged on the outer periphery of the needle valve hot runner 3.

[0033] A limiting block 25 for limiting the valve needle 8 is arranged in each needle valve hot runner 3. The limiting block 25 is located on both sides of the needle body of the corresponding valve needle 8. When the valve needle 8 reciprocates towards the nozzle 7, it is necessary to ensure that the valve needle 8 moves smoothly. Therefore, the limiting block 25 can keep the valve needle 8 stable when moving, and is not prone to shaking.

[0034] In the working process of the embodiment, the material enters the distribution plate 2 through the injection port 4 and the total hot runner 1. The distribution plate 2 distributes the material entering it to each needle valve hot runner 3. The material in each needle valve hot runner 3 moves along the inside of the needle valve hot runner 3, is injected into the injection mold through the nozzle 7 connected to the nozzle 7, enters the cavity of the injection mold, and forms an injection molding product. In this process, the first heat-conducting rod 13 conducts heat to the total hot runner 1 and detects the temperature of the total hot runner 1 by the first sensor, so as to ensure that the temperature of the material in the total hot runner 1 is within a controllable range. Similarly, the second heat-conducting rod 16 conducts heat to the distribution plate 2 and detects the temperature of the distribution plate 2 by the second sensor, so as to ensure that the temperature of the material in the distribution plate 2 is within a controllable range and can be smoothly distributed to each needle valve hot runner 3. The heating wire 18 conducts heat to the nozzle 7 of the corresponding needle valve hot runner 3 and detects the temperature of the nozzle 7 by the third temperature sensor 17, so as to ensure that when the material in each needle valve hot runner 3 reaches the position of the corresponding nozzle 7, the material can be smoothly injected into the cavity of the injection mold from the nozzle 7, and the injection of the material is completed smoothly.

[0035] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above-mentioned examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should be regarded as the protection scope of the present application.

Claims

1. A four-point needle valve pin hot runner system characterized in that, The utility model provides a total hot runner (1), the shunt plate (2) and four needle valve hot runner (3) vertical installation in the shunt plate (2), the upper surface center position of shunt plate (2) is installed through the fixed screw (6) and the fixed connection of positioning sleeve (5) with shunt plate (2), total hot runner (1) fixed installation in positioning sleeve (5), the top of total hot runner (1) is communicated with the injection port (4) for feeding glue, total hot runner (1) with the inside of shunt plate (2) is communicated, the bottom of total hot runner (1) penetrates positioning sleeve (5) to the below of shunt plate (2), four needle valve hot runner (3) including the nozzle (7) of setting at its bottom, four nozzles (7) are located below shunt plate (2), four needle valve hot runner (3) are provided with valve needle (8) in, four valve needles (8) all include the needle head (9) of setting at its bottom, needle head (9) can be moved to and the nozzle (7) of corresponding abutment connection.

2. The four-point needle valve gate hot runner system of claim 1, wherein, The surface of the positioning sleeve (5) is provided with a first temperature sensor (10) for detecting the temperature of the total hot runner (1).

3. The four-point needle valve gate hot runner system of claim 2, wherein, The surface of the first temperature sensor (10) is sleeved with a fixing ring (11), a fixing hole (12) is arranged between the surface of the first temperature sensor (10) and the fixing ring (11), and a first heat transfer rod (13) for heat transfer to the total hot runner (1) is fixedly arranged in the fixing hole (12).

4. The four-point needle valve gate hot runner system of claim 1, wherein, Second temperature sensors (14) for detecting the temperature of the shunt plate (2) are installed side by side on the upper and lower ends of the side wall of the shunt plate (2).

5. The four-point needle valve gate hot runner system of claim 4, wherein, A recessed groove (15) is arranged on the upper surface of the shunt plate (2) close to the second temperature sensor (14), a second heat transfer rod (16) for heat transfer to the shunt plate (2) is arranged in the recessed groove (15), and the bottom of the second heat transfer rod (16) extends into the shunt plate (2).

6. The four-point needle valve gate hot runner system of claim 1, wherein, Third temperature sensors (17) for detecting the temperature of the corresponding needle valve hot runner (3) are arranged at the bottom of the four needle valve hot runners (3) close to the shunt plate (2).

7. The four-point needle valve gate hot runner system of claim 6, wherein, Heating wires (18) for heat transfer to the corresponding nozzles (7) are arranged in the four needle valve hot runners (3).

8. The four-point needle valve gate hot runner system of claim 7, wherein, The four third temperature sensors (17) are each sleeved with a first sleeve ring (19), a threading hole (20) is arranged between the first sleeve ring (19) and the outer circumferential surface of the corresponding third temperature sensor (17), a guide hole (21) is arranged at the position where the four needle valve hot runners (3) are attached to the bottom of the flow distribution plate (2), a wire slot (22) is arranged at the position where the bottom end of the four needle valve hot runners (3) is close to the nozzle (7), a second sleeve ring (23) is sleeved on the outer circumferential surface of the bottom end of the four needle valve hot runners (3), a wire passing hole (24) is arranged between the second sleeve ring (23) and the outer circumferential surface of the bottom end of the corresponding needle valve hot runner (3), and the heating wire (18) sequentially passes through the corresponding threading hole (20), guide hole (21), wire passing hole (24) and wire slot (22) and enters the needle valve hot runner (3) and is close to the nozzle (7).

9. The four-point needle valve gate hot runner system of claim 7, wherein, A limiting block (25) for limiting the valve needle (8) is arranged in each of the four needle valve hot runners (3), and the limiting block (25) is located on both sides of the needle body of the corresponding valve needle (8).

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