Multi-point dense needle valve hot nozzle glue feeding module

Abstract

The utility model relates to a multi-point dense needle valve hot nozzle glue feeding module, and belongs to the technical field of injection molding hot runners. Comprising a top plate, a feeding port is formed in the top plate, a splitter plate is fixedly connected to the bottom of the top plate, a feeding runner is connected to the bottom of the feeding port, the bottom of the feeding runner is connected with the splitter plate, a plurality of spray heads are arranged at the bottom of the splitter plate, a push plate capable of longitudinally moving is arranged in the top plate, a plurality of air cylinders are arranged on the top plate, and the bottoms of the air cylinders are fixedly connected with the push plate. A plurality of fixedly connected needle valves are arranged at the bottom of the push plate, and the bottom ends of the needle valves are arranged in the spray heads respectively; in the scheme, the push plate type structure controls the needle valve to move back and forth smoothly, the gas path of the gas runner is balanced and stable, the four cylinders are linked to control the push plate to move more stably, the service life of the hot runner system is longer, the concentricity of a needle valve sprue and a mold is high, and the center distance between the needle valve and the bottom of the nozzle can be extremely small.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection hot runner technical field relates to a kind of multi-point dense needle valve hot nozzle glue feeding module. BACKGROUND

[0002] Plastic products are widely used in daily life, and plastic products are usually produced by injection mold, plastic raw materials are heated to a molten state, and then injected into the molding cavity provided in the mold. After the molding cavity is filled, the mold is rapidly cooled, the molten plastic raw material is cooled and shaped to form the required plastic part.

[0003] In some injection molds, a hot runner can be provided in the mold structure. The hot runner can keep the plastic sent by the injection machine nozzle to the sprue in a molten state at all times. The molten material remaining in the gating system can be injected into the cavity when it is injected again without solidification as waste.

[0004] In the hot runner system, there is a needle valve type structure. The melt flows into the glue inlet first, and then flows through the flow distribution plate. After the flow distribution, it is injected into the molding cavity from the bottom nozzle. A needle valve is provided inside the nozzle to control the opening and closing of the nozzle. The glue feeding sequence in the molding cavity is controlled to improve the quality of the injection molded product. However, the needle valve in the prior art is usually controlled by a single cylinder, which has the technical problem of poor stability. It cannot accurately control the glue feeding of the nozzle, and when more needle valves are needed inside the mold, there is not enough space to set up the cylinder. SUMMARY

[0005] The utility model aims at the problems existing in the prior art and proposes a multi-point dense needle valve hot nozzle glue feeding module. The technical problem to be solved by the utility model is how to improve the stability of the driving needle valve moving device.

[0006] The utility model can be realized by the following technical scheme: a multi-point dense needle valve hot nozzle glue feeding module, comprising a top plate, the top plate is provided with a feed inlet, the bottom of the top plate is provided with a fixed flow distribution plate, the bottom of the feed inlet is connected with a feed flow channel, the bottom of the feed flow channel is connected with the flow distribution plate, the bottom of the flow distribution plate is provided with a plurality of nozzles, the inside of the top plate is provided with a push plate that can move longitudinally, the top plate is provided with a plurality of cylinders, the bottom of the cylinder is fixedly connected with the push plate, the bottom of the push plate is provided with a plurality of fixed needle valves, and the bottom end of the needle valve is arranged in the inside of the nozzle.

[0007] In the scheme, the plastic raw material of the molten liquid is injected from the feed port, flows into the distributor through the feed flow channel, is injected into the cavity of the mold from the multiple nozzles at the bottom through the distribution of the distributor, realizes the function of multiple point dense glue injection, and is controlled by multiple cylinders to move the push plate longitudinally in the top plate. The push plate drives the fixedly connected needle valve at the bottom to move. When the needle valve moves upward, the nozzle is opened and glue can be injected to the bottom. When the needle valve moves downward, the nozzle at the bottom is blocked by the needle valve, and the glue injection stops. Through the above-mentioned mode, the push plate type structure controls the back and forth movement of the needle valve smoothly, the cylinder linkage controls the push plate to move more stably, and the service life of the hot runner system is longer.

[0008] In the above-mentioned multiple point dense needle valve hot nozzle glue injection module, the bottom of the distributor is provided with a fixed upper mold base, the bottom of the upper mold base is provided with a plurality of separately arranged upper forming cavities, and the bottom of the nozzle is connected with a single upper forming cavity. The upper mold base is used for being connected with the lower mold base, and the plastic product is formed in the upper forming cavity after the mold is jointed.

[0009] In the above-mentioned multiple point dense needle valve hot nozzle glue injection module, a plurality of gas flow channels are arranged in the top plate, at least two gas flow channels are connected with a single cylinder, and the cylinder is arranged at the four corners of the top plate. The outer end of the gas flow channel is connected with the gas pump, gas is injected or discharged into the gas flow channel, and the cylinder is controlled to stretch and retract. The four cylinders are arranged at the corners, and the push plate moves more stably.

[0010] In the above-mentioned multiple point dense needle valve hot nozzle glue injection module, upper and lower cavities are arranged in the cylinder, one of the gas flow channels is connected with the upper cavity, and the other is connected with the lower cavity, a piston is arranged in the cylinder, the piston is arranged between the upper and lower cavities, one end of the piston extends from the bottom of the cylinder and is fixedly connected with the push plate. The inside of the cylinder is divided into two chambers, when the pressure in one side chamber increases, the piston is pushed to move to the other side, and the push plate at the bottom is driven to move, so that the movement of the needle valve is stably controlled.

[0011] In the above-mentioned multiple point dense needle valve hot nozzle glue injection module, a junction box is arranged on one side of the top plate and the distributor, a positioning ring is arranged at the center of the top plate, and the feed port is arranged in the inside of the positioning ring. The junction box is used for connecting the external line and heating the inside of the distributor, and the positioning ring can play a positioning role and is connected with the external injection machine.

[0012] In the above-mentioned multiple point dense needle valve hot nozzle glue injection module, a sleeve ring is arranged in the four corners of the push plate, a fixed guide column is arranged between the top plate and the distributor, and the guide column is inserted into the sleeve ring and is in sliding connection with the sleeve ring. The guide column plays a guiding role, so that the push plate can move longitudinally.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. In this solution, the pusher plate structure controls the needle valve to move back and forth smoothly, the gas flow channel is balanced and stable, and the four cylinders work together to control the pusher plate to move more stably, which makes the hot runner system have a longer service life. The needle valve gate and the mold have high concentricity, and the center distance between the needle valve and the bottom of the nozzle can be made extremely small. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a frontal half-sectional view of the structure of this utility model;

[0017] Figure 3 This is a front view cross-sectional structure and a partially enlarged structural diagram of the cylinder part of this utility model;

[0018] Figure 4 This is a schematic diagram of the right-side cross-sectional structure of the nozzle part of this utility model;

[0019] Figure 5 This is a schematic diagram of the right-side cross-sectional structure of the guide post portion of this utility model.

[0020] In the diagram, 1 is the top plate; 1a is the feed inlet; 1a1 is the feed channel; 1b is the positioning ring; 1c is the gas channel; 2 is the flow divider; 2a is the nozzle; 3 is the cylinder; 3a is the upper cavity; 3b is the lower cavity; 3c is the piston; 4 is the upper mold base; 4a is the upper forming cavity; 5 is the push plate; 5a is the needle valve; 5b is the collar; 6 is the guide post; and 7 is the junction box. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] Example

[0023] like Figure 1 As shown, the multi-point dense needle valve 5a hot nozzle glue injection module includes a top plate 1, a positioning ring 1b is provided at the top center of the top plate 1, a feed port 1a is provided inside the positioning ring 1b, cylinders 3 are provided at the four corners of the top plate 1, a flow divider plate 2 is provided at the bottom of the top plate 1, a junction box 7 is provided on one side of the top plate 1 and the flow divider plate 2, and an upper mold base 4 is provided at the bottom of the flow divider plate 2.

[0024] like Figure 2 As shown, the top plate 1 has a push plate 5 that can move longitudinally inside. The push plate 5 is located between the top plate 1 and the diversion plate 2. The bottom of the feed inlet 1a has a connected feed channel 1a1. The bottom of the feed channel 1a1 passes through the push plate 5 and is connected to the diversion plate 2.

[0025] like Figure 3 As shown, the top plate 1 has a plurality of gas flow channels 1c inside, and each cylinder 3 is connected to at least two gas flow channels 1c. The cylinder 3 has an upper chamber 3a and a lower chamber 3b inside. One of the gas flow channels 1c is connected to the upper chamber 3a and the other is connected to the lower chamber 3b. The cylinder 3 has a piston 3c inside, which is located between the upper chamber 3a and the lower chamber 3b. One end of the piston 3c extends from the bottom of the cylinder 3 and is fixedly connected to the push plate 5.

[0026] like Figure 4 As shown, the bottom of the flow divider plate 2 is provided with a plurality of nozzles 2a, the bottom of the upper mold base 4 is provided with a plurality of individually provided upper forming cavities 4a, the bottom of each nozzle 2a is connected to a single upper forming cavity 4a, the bottom of the push plate 5 is provided with a plurality of fixed needle valves 5a, the bottom end of each needle valve 5a is located inside the nozzle 2a, and the bottom end of each needle valve 5a extends to the connection between the nozzle 2a and the upper forming cavity 4a. The needle valves 5a, nozzles 2a and upper forming cavities 4a are concentrically arranged.

[0027] like Figure 5 As shown, the push plate 5 has four corners with collars 5b inside, and the top plate 1 and the diverter plate 2 are connected by guide posts 6. The guide posts 6 are inserted into the collars 5b and are slidably connected to the collars 5b.

[0028] The working principle of this solution is as follows: Figures 1-5 As shown, molten plastic raw material is injected through the inlet 1a and flows into the distributor plate 2 through the inlet channel 1a1 at the bottom. The molten material then flows into each nozzle 2a within the distributor plate 2. When the four cylinders 3 simultaneously pull the push plate 5 upwards, the push plate 5 pulls all the needle valves 5a upwards, allowing the molten material to be injected from the nozzles 2a into the upper molding cavity 4a. Simultaneous injection from multiple nozzles 2a achieves multi-point dense injection. When the cylinders 3 push the push plate 5 downwards, the needle valves 5a seal the nozzle openings at the bottom of the nozzles 2a, stopping the injection.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as 1. top plate; 1a. feed inlet; 1a1. feed channel; 1b. positioning ring; 1c. gas channel; 2. flow divider; 2a. nozzle; 3. cylinder; 3a. upper cavity; 3b. lower cavity; 3c. piston; 4. upper mold base; 4a. upper forming cavity; 5. push plate; 5a. needle valve; 5b. collar; 6. guide post; 7. junction box, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A multi-point dense needle valve hot nozzle glue injection module, comprising a top plate (1), wherein the top plate (1) is provided with a feed inlet (1a), and a flow divider plate (2) fixedly connected to the bottom of the top plate (1), wherein a feed channel (1a1) is connected to the bottom of the feed inlet (1a), and the bottom of the feed channel (1a1) is connected to the flow divider plate (2), characterized in that, The bottom of the diverter plate (2) is provided with several nozzles (2a), the top plate (1) is provided with a push plate (5) that can move longitudinally, the top plate (1) is provided with several cylinders (3), the bottom of the cylinders (3) is fixedly connected to the push plate (5), the bottom of the push plate (5) is provided with several needle valves (5a) fixedly connected, and the bottom ends of the needle valves (5a) are respectively located inside the nozzles (2a).

2. The multi-point dense needle valve hot nozzle glue injection module according to claim 1, characterized in that, The bottom of the flow divider (2) is provided with an upper mold base (4) fixedly connected to it. The bottom of the upper mold base (4) is provided with several separately set upper forming cavities (4a). The bottom of the nozzle (2a) is connected to a single upper forming cavity (4a) respectively.

3. The multi-point dense needle valve hot nozzle glue injection module according to claim 1, characterized in that, The top plate (1) is provided with several gas flow channels (1c), and each cylinder (3) is connected to at least two gas flow channels (1c). The cylinder (3) is located at the four corners of the top plate (1).

4. The multi-point dense needle valve hot nozzle glue injection module according to claim 3, characterized in that, The cylinder (3) has an upper chamber (3a) and a lower chamber (3b) inside. One of the gas flow channels (1c) is connected to the upper chamber (3a) and the other is connected to the lower chamber (3b). The cylinder (3) has a piston (3c) inside. The piston (3c) is located between the upper chamber (3a) and the lower chamber (3b). One end of the piston (3c) extends from the bottom of the cylinder (3) and is fixedly connected to the push plate (5).

5. The multi-point dense needle valve hot nozzle glue injection module according to claim 1, characterized in that, A junction box (7) is provided on one side of the top plate (1) and the diversion plate (2). A positioning ring (1b) is provided at the center of the top plate (1), and the feed inlet (1a) is located inside the positioning ring (1b).

6. The multi-point dense needle valve hot nozzle glue injection module according to claim 1, characterized in that, The push plate (5) has four corners with collars (5b) inside. The top plate (1) and the diverter plate (2) are connected by guide posts (6). The guide posts (6) are inserted into the collars (5b) and slidably connected to the collars (5b).

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