CN209395182U - More needles move synchronously hot runner system - Google Patents

Abstract

The utility model discloses a multi-valve needle synchronously moving hot runner system, which comprises: a runner plate connected to an injection molding machine; a hot nozzle assembly arranged on one side of the runner plate and connected to the runner plate and There are multiple glue outlets between the molding cavities; a cylindrical cylinder is set on the other side of the flow channel plate; The power output end of the cylindrical cylinder, and the other side is inserted into the hot nozzle assembly, so as to open and close the glue outlet under the drive of the cylindrical cylinder. The multi-valve needle synchronously moving hot runner system provided by the utility model has the advantages of convenient installation and wide application range.

Description

Multi-valve needle synchronous motion hot runner system

technical field

The utility model relates to the technical field of hot runners, in particular to a multi-valve needle synchronously moving hot runner system.

Background technique

Injection molding is a processing method that injects molten plastic solution into the cavity. The main equipment includes: injection molding machine and mold. There is a hot runner system and molding cavity in the mold. The hot runner is connected to the injection molding machine and the molding cavity. .

Among the various hot runner systems that appear at present, the valve needle hot runner system is commonly used and can guarantee the quality of molded products. The valve needle hot runner system is equipped with a valve needle, which can move upwards in the vertical direction to open or to The downward movement is closed, so that when the finished product is ejected, the valve needle moves downward to close the hot nozzle, avoiding one or several nozzles, so as to achieve no waste.

The common valve needle hot runner system is to drive a valve needle to move through a cylinder. Due to the volume limitation of the cylinder, the distance between two adjacent valve needles cannot be set very small, and then in the production of small spacing, dense arrangement The products are limited; at the same time, the existing cylinder and hot nozzle are set on the same side of the runner plate, which is not conducive to the installation of the hot runner system, and the assembly is difficult.

Utility model content

The main purpose of the utility model is to propose a multi-valve needle synchronously moving hot runner system, aiming to solve the technical problem that the existing hot runner system cannot use needle valve hot nozzles to produce products with small spacing and dense arrangement.

In order to achieve the above purpose, the multi-valve needle synchronous motion hot runner system proposed by the utility model includes:

The runner plate is connected with the injection molding machine;

The hot nozzle assembly is arranged on one side of the runner plate, communicates between the runner plate and the molding cavity, and has a plurality of glue outlets;

a cylindrical cylinder arranged on the other side of the flow channel plate; and,

A plurality of valve needles, the valve needles are in an annular array, one side is fixed at the power output end of the cylindrical cylinder, and the other side is inserted in the hot nozzle assembly for Driven to open and close the glue outlet.

Optionally, the cylindrical cylinder includes a cylinder body and a piston, a cylindrical air chamber is formed in the cylinder body, and a valve needle through hole for the valve needle to pass through is provided on the wall of the air chamber ; The piston is adapted to the air cavity, and its peripheral edge is attached to the side cavity wall of the air cavity, the piston is movably arranged in the air cavity, and divides the air cavity into a first chamber and the second chamber.

Optionally, the cylinder body includes a cylinder upper cover and a cylinder body, the cylinder body is formed with the air cavity, and the cylinder upper cover is formed with an air groove, and the air groove communicates with the gas pipeline and the first chamber between rooms.

Optionally, the upper cover of the cylinder also has a relief groove, the relief groove communicates with the air groove, and the piston has an insertion protrusion on the side close to the upper cover of the cylinder. The insertion protrusion fits into said relief groove arrangement.

Optionally, the side of the cylinder body close to the upper cover of the cylinder also has an upper vent hole, and the vent hole is connected between the gas pipeline and the first chamber.

Optionally, the cylinder upper cover is detachably assembled with the cylinder body.

Optionally, the piston includes a piston plate and a plurality of piston rods, the piston plate is arranged in a cylindrical shape, and its peripheral edge is attached to the cavity wall of the air chamber, and the piston rod is arranged corresponding to the valve needle , and extend from the piston plate to one side of the valve needle through hole, and the valve needle is partially inserted into the piston rod.

Optionally, the piston rod is detachably arranged on the piston plate.

Optionally, the hot runner system further includes a heating module, and the heating module is arranged on the hot nozzle assembly.

Optionally, the hot nozzle assembly includes an integrated hot nozzle and a plurality of needle valve hot nozzles, the integrated hot nozzle is connected between the flow channel plate and the plurality of needle valve hot nozzles, and one of the needle valve hot nozzles The mouth has a glue outlet.

The multi-valve needle synchronous motion hot runner system provided by the technical solution of the utility model includes a runner plate, a hot nozzle assembly, a cylindrical cylinder and a plurality of valve needles, wherein the hot nozzle assembly and the cylindrical cylinder are respectively arranged on two sides of the runner plate. On the side, a plurality of valve needles are arranged in a circular array at the power output end of the cylindrical cylinder, and inserted into the hot nozzle assembly, which can be driven by the cylindrical cylinder to open and close the glue outlet of the hot nozzle assembly; in the prior art Among them, since the cylinder and the hot nozzle are installed on the same side of the runner plate, the difficulty of assembly and subsequent maintenance of the hot runner system increases. Compared with the prior art, the technical solution of this application combines the hot nozzle assembly with the Cylindrical cylinders are located on both sides of the runner plate, which makes the installation and maintenance of the hot runner system easier; at the same time, multiple valve needles in an annular array are driven by a cylindrical cylinder, so that the distance between adjacent valve needles is significantly reduced , and improves the synchronization of the movement of multiple needle valves, and solves the technical problem that the hot runner system in the prior art cannot use needle valve hot nozzles to produce products with small spacing and dense arrangement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is a structural schematic diagram of an embodiment of the multi-valve needle synchronously moving hot runner system of the present invention;

Fig. 2 is the explosion diagram of cylinder cylinder in the embodiment shown in Fig. 1;

Fig. 3 is the structural representation of cylinder upper cover and piston in the embodiment shown in Fig. 1;

Fig. 4 is the explosion diagram of piston in the embodiment shown in Fig. 1;

Fig. 5 is a sectional view of the flow channel plate in the embodiment shown in Fig. 1;

Fig. 6 is an exploded view of the nozzle assembly and the heating module in the embodiment shown in Fig. 1 .

Explanation of reference numbers:

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B" as an example, including scheme A, scheme B, or schemes that both A and B satisfy. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.

The utility model proposes a multi-valve needle synchronously moving hot runner system.

In the embodiment of the utility model, please refer to FIG. 1, the multi-valve needle synchronous motion hot runner system includes a runner plate 4, a hot nozzle assembly 2, a cylindrical cylinder 1, and a valve needle 3, wherein the runner plate 4 It is connected between the injection molding machine and the hot nozzle assembly 2, and there is a flow channel for the molten injection material to flow; the hot nozzle assembly 2 is connected between the flow channel plate 4 and the molding cavity, and has multiple glue outlets Cylinder cylinder 1 is set on the opposite side of flow channel plate 4 and hot nozzle assembly 2, that is, cylindrical cylinder 1 and hot nozzle assembly 2 are separately arranged on both sides of flow channel plate 4; valve needle 3 corresponds to hot nozzle assembly 2 There are multiple glue outlets on the top, and multiple valve needles 3 are arranged in a circular array. One side of the valve needle 3 is fixed on the power output end of the cylindrical cylinder 1, and the other side is inserted into the hot nozzle assembly 2. It is used to open and close the glue outlet of the hot nozzle assembly 2 under the drive of the cylindrical cylinder 1. Specifically, in this embodiment, the hot nozzle assembly 2 has four glue outlets. Correspondingly, the valve needle 3 is provided with 4 sticks. It should be noted that, in other embodiments, the number of valve needles 3 can also be set to 2, 3 or even more.

In the prior art, since the cylinder and the hot nozzle are installed on the same side of the runner plate 4, the difficulty of assembly and subsequent maintenance of the hot runner system increases. Compared with the prior art, the technical solution of the present application passes The hot nozzle assembly 2 and the cylindrical cylinder 1 are separately arranged on both sides of the runner plate 4, which makes the installation and maintenance of the hot runner system easier; at the same time, a plurality of valve pins 3 in an annular array are driven by a cylindrical cylinder 1, The distance between adjacent valve needles 3 is significantly reduced, and the synchronization of multiple needle valve movements is improved, which solves the problem that the hot runner system in the prior art cannot use needle valve hot nozzles to produce small-pitch and densely arranged products technical problems.

Further, please refer to FIG. 1 and FIG. 2, the cylinder cylinder 1 includes a cylinder body 11 and a piston 12, wherein a cylindrical air chamber is formed in the cylinder body 11, and a side wall of the air chamber has a The valve needle through hole 13 for the valve needle 3 to pass through, the periphery of the piston 12 is adapted to the air cavity, and is attached to the side cavity wall of the air cavity. Since the cylinder is set as a cylinder, setting the air cavity as a cylinder can maximize the use of the space in the cylinder body 11. Under the condition of ensuring a certain volume of the cylinder cylinder 1, the volume of the air cavity can be increased as much as possible, so that In order to reduce the thickness of the template and save the cost of the mold. Since the valve needles 3 are arranged in an annular array on the piston 12, setting the piston 12 to a shape suitable for the air cavity also helps to reduce the distance between the valve needles 3, so that on the piston 12 within a certain area, the More valve needles 3 are beneficial to the integrated arrangement of the cylindrical cylinder 1 .

Specifically, the piston 12 is movably disposed in the air chamber, and divides the air chamber into a first chamber and a second chamber. According to the working principle of the cylinder, with the movement of the piston 12 in the cylinder 11, the volumes of the first chamber and the second chamber will change in inverse proportion, and there is a state that the volume is zero. The first chamber and the second chamber referred to in this application refer to the state when the piston 12 divides the air chamber approximately evenly. When the volume of the first chamber is 0, it can still be considered that the first chamber exists , but the volume is 0, and vice versa. It should be noted that, in some embodiments, the power output end of the cylinder can also be set as a diaphragm.

Further, as shown in FIG. 2 and FIG. 3 , the cylinder body 11 includes a cylinder upper cover 111 , a cylinder body 112 and a cylinder lower cover 116 , wherein the cylinder upper cover 111 and the cylinder lower cover 116 are located on opposite sides of the cylinder body 112 The cylinder upper cover 111, the cylinder body 112 and the cylinder lower cover 116 are all cylindrically arranged, the cylinder lower cover 116 is formed with the above-mentioned valve needle through hole 13, the cylinder body 112 forms the above-mentioned air cavity, and the piston 12 is movably arranged on the cylinder body 112 and the peripheral edge fits on the inner peripheral edge of the cylinder body 112, the cylinder upper cover 111 is formed with an air groove 113, and the air groove 113 is connected between the above-mentioned first chamber and a gas pipeline 6, and the gas pipeline 6 is connected to the gas supply pipeline. The gas device is connected. When the cylindrical cylinder 1 is working, the gas supply device delivers high-pressure gas to the first chamber through the gas pipeline 6, driving the piston 12 to move to the side where the cylinder lower cover 116 is located, and then drives the valve needle 3 to close the hot nozzle assembly 2; The second chamber is filled with air, and when the piston 12 moves to the side where the cylinder upper cover 111 is located, the air groove 113 is used as a discharge channel for the gas in the first chamber, and at this time, the glue outlet of the hot nozzle assembly 2 is opened. Specifically, in this embodiment, the air supply device is an air compressor, and in other embodiments, the air supply device may also be an air pump or other pumping equipment.

Specifically, the air grooves 113 are arranged on the side of the upper cylinder cover 111 facing the lower cylinder cover 116 , and there are four air grooves around the center of the upper cylinder cover 111 . By increasing the number of air grooves 113 , the speed of air entering and exiting the first chamber can be increased, so as to increase the speed of movement of the piston 12 .

Further, in order to increase the intake velocity of the first chamber, the cylinder body 112 also has an upper vent hole (not shown in the figure) on the side close to the cylinder upper cover 111, and the upper vent hole communicates with the gas delivery pipeline 6 and Between the first chambers, the function of the air groove 113 is the same. During the working process of the cylindrical cylinder 1, the upper air hole can be used as an air inlet or an air outlet.

Further, as shown in Figure 2 and Figure 3, the upper cylinder cover 111 also has a relief groove 114, which communicates with the above-mentioned air groove 113, and when the piston 12 is close to the upper cylinder cover 111 There is an insertion protrusion 123 on one side, the insertion protrusion 123 is fitted to the relief groove 114, and the insertion protrusion 123 can be inserted into the relief groove 114 as the piston 12 moves. Through the cooperation of the insertion protrusion 123 and the relief groove 114 , the piston 12 can be limited, and the position of the piston 12 in the cylinder body 11 can be limited. Simultaneously, after the insertion protrusion 123 is inserted in the relief groove 114, the air groove 113 remains unimpeded, so that when the gas is input into the first chamber, the gas enters the first chamber more easily to drive the piston 12, It is beneficial to the quick start of the piston 12.

Further, please continue to refer to FIG. 2, the cylinder body 112 is provided with a plurality of lower ventilation holes 115 on the side near the cylinder lower cover 116. chamber for the gas in and out of the second chamber. Since the function of the lower air hole 115 is the same as that of the upper air hole, it will not be repeated here.

Furthermore, the cylinder upper cover 111 is detachably assembled on the cylinder body 112. Specifically, in this embodiment, the cylinder upper cover 111 is inserted into the cylinder body 112, and is sealed with the cylinder body 112 through a sealing ring. connect. The detachable assembly between the cylinder upper cover 111 and the cylinder body 112 can facilitate the assembly and maintenance of the cylindrical cylinder 1 and reduce the installation difficulty of the hot runner system. In other embodiments, the upper cover 111 of the cylinder can also be detachably assembled with the cylinder body 112 through threaded connection or clamping.

Furthermore, after the upper cylinder cover 111 is closed on the cylinder body 112, it is fixed on the formwork by screws, so as to increase the tightness of the connection between the upper cylinder cover 111 and the cylinder body 112.

Further, please refer to FIG. 4, the piston 12 includes a piston plate 121 and a piston rod 122, wherein the piston plate 121 is cylindrically arranged, and its peripheral edge is attached to the side cavity wall of the air cavity, and the peripheral edge of the piston plate 121 A sealing ring is also provided on the ring to improve the airtightness of the connection between the piston plate 121 and the side wall of the air cavity; root, the piston plate 121 extends from the piston plate 121 to the side where the cylinder lower cover 116 is located, and is inserted into the valve needle through hole 13 on the cylinder lower cover 116, and the hole wall of the valve needle through hole 13 is provided with The sealing ring is used to improve the airtightness of the connection between the piston rod 122 and the valve needle through hole 13 . A slot is formed in the piston rod 122 for inserting the valve needle 3 and fixing the valve needle 3 .

It can be understood that by inserting part of the valve needle 3 into the piston rod 122, the stability of the connection between the valve needle 3 and the piston 12 can be increased, so that the valve needle 3 is not easy to deviate during the movement process, and the movement stability of the valve needle 3 can be improved. sex. Since the piston rod 122 is inserted in the valve needle through hole 13, the piston rod 122 can be limited by the hole wall of the valve needle through hole 13, so as to improve the stability of the movement of the piston 12, and accordingly, the movement of the valve needle 3 can be improved. stability.

Further, the piston rod 122 is detachably arranged on the piston plate 121. Since the piston plate 121 and the piston rod 122 are detachably assembled, when the piston plate 121 and the piston rod 122 are processed, the allowable error in the process increases. Larger, the machining accuracy between the piston plate 121 and the piston rod 122 is appropriately reduced, which is beneficial to the manufacture and assembly of the piston 12, and the detachable assembly between the piston plate 121 and the piston rod 122 is beneficial to the replacement and maintenance of the subsequent valve needle 3 .

Specifically, please continue to refer to FIG. 4. In this embodiment, the piston plate 121 is provided with a plurality of slots 124 corresponding to the piston rod 122, and the piston rods 122 are inserted into the slots 124 one by one. An annular retaining spring 125 is provided on the wall of the groove, and the annular retaining spring 125 can engage with the piston rod 122 to fix the piston plate 121 and the piston rod 122 . It should be noted that, in other embodiments, the detachable assembly between the piston rod 122 and the piston plate 121 can also be achieved by means of screws or clamping.

Further, please refer to FIG. 5 , an independent valve needle channel 41 is formed on the runner plate 4 corresponding to each valve needle 3 , and the valve needle 3 is inserted into the hot nozzle assembly 2 through the valve needle channel 41 , and the valve There is a gap between the needle 3 and the valve needle channel 41 . There is a gap between the valve needle channel 41 and the valve needle 3, which can effectively prevent heat conduction, and prevent the heat on the runner plate 4 from being transferred to the valve needle 3, causing the cylinder cylinder 1 to overheat. At the same time, this gap can prevent the runner plate 4 from resisting the valve needle 3 when the runner plate 4 thermally expands, causing the valve needle 3 to bend, causing the needle to be stuck, and causing the injection molding of the hot nozzle assembly 2 to be unsmooth.

Further, please refer to FIG. 6, the hot nozzle assembly 2 includes an integrated hot nozzle 21 and a needle valve hot nozzle 22, wherein the integrated hot nozzle 21 is connected between the flow channel plate 4 and the needle valve hot nozzle 22, and the needle valve hot nozzle 22 is provided with multiple pieces, which are connected between the integrated hot nozzle 21 and the molding cavity, and each needle valve hot nozzle 22 has a glue outlet.

Specifically, the integrated hot nozzle 21 has a shunt passage connected with the runner plate 4, and the shunt passage can introduce the injection material in the molten state into the needle valve hot nozzle 22, and the integrated hot nozzle 21 also has The nozzle 22 is connected to the escape passage through which the valve needle 3 is inserted into the needle valve hot nozzle 22 . The needle valve hot nozzle 22 extends from the integrated hot nozzle 21 to the side where the molding cavity is located, which prolongs the time for the injection material to stay in the hot nozzle assembly 2 .

Further, the multi-valve needle synchronous motion hot runner system also includes a heating module 5, the heating module 5 is arranged on the hot nozzle assembly 2, through the setting of the heating module 5, the hot nozzle assembly 2 can be heated, so that the hot nozzle The injection material flowing in the component 2 remains in a molten state, so as to facilitate the injection molding work. Since the needle valve assembly extends to the side where the molding cavity is located, the length of the hot nozzle assembly 2 is extended, so that the area covered by the heating module 5 of the hot nozzle assembly 2 is increased, and the molten state of the injection material can be better maintained.

Specifically, in this embodiment, the heating module 5 includes a soaking copper 51 and a heating wire 52, wherein the soaking copper 51 is coated on the outer peripheral side of the integrated nozzle 21 and the needle valve nozzle 22, and the heating wire 52 is in a spiral shape. Wrapped on the outside of the soaking copper 51. The heat soaking copper 51 can take advantage of the good thermal conductivity of metal copper to efficiently and evenly transfer the heat generated by the heating wire 52 to the nozzle assembly 2, and the heating wire 52 can convert electrical energy into heat energy, improving the heating function while Keeping the volume of the heating module 5 small is conducive to reducing the distance between the needle valve hot nozzles 22 .

The above is only a preferred embodiment of the present utility model, and does not therefore limit the scope of the patent of the present utility model. Under the inventive concept of the present utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, or Direct/indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims (10)

1. A multi-valve needle synchronous motion hot runner system, characterized in that it comprises: The runner plate is connected with the injection molding machine; The hot nozzle assembly is arranged on one side of the runner plate, communicates between the runner plate and the molding cavity, and has a plurality of glue outlets; a cylindrical cylinder arranged on the other side of the flow channel plate; and, A plurality of valve needles, the valve needles are in an annular array, one side is fixed at the power output end of the cylindrical cylinder, and the other side is inserted in the hot nozzle assembly for Driven to open and close the glue outlet. 2. The multi-valve needle synchronous motion hot runner system according to claim 1, wherein the cylindrical cylinder includes a cylinder body and a piston, and a cylindrical air chamber is formed in the cylinder body, and the air chamber The cavity wall of the cavity has a needle through hole for the valve needle to pass through; the piston is adapted to the air cavity, and its peripheral edge is attached to the side cavity wall of the air cavity, and the piston is movable It is arranged in the air cavity and divides the air cavity into a first chamber and a second chamber. 3. The multi-valve needle synchronous motion hot runner system according to claim 2, wherein the cylinder body includes a cylinder upper cover and a cylinder body, the cylinder body is formed with the air cavity, and the cylinder upper cover An air groove is formed on the top, and the air groove communicates between the gas transmission pipeline and the first chamber. 4. The multi-valve needle synchronous motion hot runner system according to claim 3, wherein the upper cover of the cylinder also has a relief groove, and the relief groove communicates with the air groove, so that The side of the piston close to the upper cover of the cylinder has an insertion protrusion, and the insertion protrusion is adapted to be arranged in the relief groove. 5. The multi-valve needle synchronous motion hot runner system according to claim 3, characterized in that, the side of the cylinder body close to the upper cover of the cylinder also has an upper vent hole, and the vent hole communicates with the gas pipeline between the first chamber. 6 . The multi-valve needle synchronous motion hot runner system according to claim 3 , wherein the upper cover of the cylinder is detachably assembled with the cylinder body. 7. The multi-valve needle synchronous motion hot runner system according to claim 2, wherein the piston comprises a piston plate and a plurality of piston rods, the piston plate is cylindrically arranged, and the periphery is in contact with the gas The cavity walls of the cavity are attached together, the piston rod is arranged corresponding to the valve needle, and extends from the piston plate to the side of the valve needle through hole, and the valve needle is partially inserted into the piston rod . 8. The multi-valve needle synchronous motion hot runner system according to claim 7, wherein the piston rod is detachably arranged on the piston plate. 9 . The multi-valve needle synchronous motion hot runner system according to claim 1 , wherein the hot runner system further comprises a heating module, and the heating module is arranged on the nozzle assembly. 10. The multi-valve needle synchronous motion hot runner system according to claim 1, wherein the hot nozzle assembly includes an integrated hot nozzle and a plurality of needle valve hot runners, and the integrated hot nozzle is connected to the runner plate Between the plurality of needle valve hot nozzles, one needle valve hot nozzle has one glue outlet.