WO2020252602A1

WO2020252602A1 - Sliding rod single-point needle valve thermal runner system

Info

Publication number: WO2020252602A1
Application number: PCT/CN2019/000205
Authority: WO
Inventors: 盘大勇; 周义
Original assignee: 苏州好特斯模具有限公司
Priority date: 2019-06-18
Filing date: 2019-11-04
Publication date: 2020-12-24
Also published as: CN110181772A

Abstract

Provided is a sliding rod single-point needle valve thermal runner system, comprising an injection nozzle main body (3) and a heating sleeve (6), wherein the injection nozzle main body (3) is mounted and fixed at a position inside the heating sleeve (6), an outer side of the heating sleeve (6) is connected to an injection nozzle outer sleeve (7) in a sheathed manner, a right end of an outer side of the injection nozzle outer sleeve (7) is provided with an outer sleeve fixing ring (11), a right end of the injection nozzle main body (3) is provided with a thermal nozzle main body (8), an outer side of the thermal nozzle main body (8) is provided with a thermal nozzle lining (10), the interior of the injection nozzle main body (3) is provided with a needle valve (9), and the position, located on a left side of the needle valve (9), inside the injection nozzle main body (3) is provided with a sliding needle valve fixing rod (4); and the principle of the system is that an oil cylinder assembly (1) is mounted on a side edge of the thermal nozzle main body (8), the sliding needle valve fixing rod (4) with an angle is utilized to push the needle valve (9) to lift, so as to open or close a valve needle opening, and the oil cylinder assembly (1) is supported on one side of the thermal nozzle main body (8) through support columns (2) to be away from a heating end of the thermal nozzle main body (8). The structure is simple and mounting and dismounting are more convenient.

Description

Sliding rod single-point needle valve hot runner system

Technical field

The invention belongs to the technical field of related single-point needle valves, and particularly relates to a sliding rod single-point needle valve hot runner system.

Background technique

The single-point needle valve is a fine-tuning valve whose valve plug is needle-shaped, mainly used to adjust the air flow. The fine-tuning valve requires the opening of the valve port to gradually increase, and it can be continuously and finely adjusted from closed to maximum. The needle valve plug can achieve this function. The needle valve plug is generally made of hardened steel long needle, and the valve seat is made of soft materials such as tin and copper. The seal between the valve needle and the valve seat is achieved by the close fit of its conical surface. The taper of the valve needle has two taper angles of 1:50 and 60. The taper surface must be finely ground. The seal between the valve stem and the valve seat is realized by a bellows.

The existing single-point needle valve hot runner system technology has the following problems: 1. In the single-point needle valve hot runner system, the hot nozzle runner and heater are located in the center of the cylinder block, and the heat radiation of the heater will be transmitted to the cylinder seal On the ring, the sealing ring works under high temperature for a long time, the life of the sealing ring is short, and the cylinder is easy to leak, which affects the performance of the cylinder; 2. The cylinder body diameter is too large, which takes up mold space and requires a larger stroke of the injection molding machine, and the production cost is high; .The hot nozzle flow path is too small, the injection pressure is high, and the valve needle is easy to close tightly, which affects the injection molding and the product qualification rate is low.

In order to solve the above problems, the sliding rod single-point needle valve hot runner system is now invented. The principle of the invention is to install the cylinder on the side of the hot nozzle and use the angled sliding rod to push the valve needle up and down, open or close the valve needle The glue port, the cylinder is supported by a support column on one side of the nozzle, away from the heating end of the hot nozzle, with simple structure and more convenient disassembly and assembly.

Summary of the invention

The purpose of the present invention is to provide a sliding rod single-point needle valve hot runner system to solve the problems raised in the background art.

In order to achieve the above objectives, the present invention provides the following technical solutions:

The sliding rod single-point needle valve hot runner system includes an injection nozzle main body and a heating jacket. The injection nozzle main body is installed and fixed at the inner position of the heating jacket. The outer side of the heating jacket is sleeved with an injection nozzle jacket. The injection nozzle The outer right end of the outer sleeve is provided with a sleeve fixing ring, the right end of the injection nozzle body is provided with a hot nozzle body, a hot nozzle bush is provided at a position outside the hot nozzle body, and the injection nozzle body is provided with A valve needle, a sliding valve needle fixing rod is provided inside the injection nozzle main body and located on the left side of the valve needle, a bearing is provided inside the injection nozzle main body and located on the left side of the sliding valve needle fixing rod, and the injection nozzle The upper end of the main body is connected with a support column by welding, and the upper end of the support column is provided with an oil cylinder assembly.

Preferably, the casing of the injection nozzle includes an inner hole, an upper hole, a sleeve body, a retaining ring and a heat dissipation protrusion, the sleeve body is provided with an inner hole, and the right end of the sleeve body is connected with the retaining ring by welding. The surface of the sleeve body is provided with heat dissipation protrusions, and the upper end of the sleeve body is provided with an upper hole.

Preferably, the inner diameter of the casing of the injection nozzle is equal to the outer diameter of the heating jacket.

Preferably, the injection nozzle jacket and the hot nozzle bush are fixedly connected by a buckle with a jacket fixing ring.

Preferably, the outer casing fixing ring is an annular structure, and the inner side of the outer casing fixing ring is provided with a groove.

Preferably, a total of two support columns are provided, and both support columns are installed and fixed at a position between the oil cylinder assembly and the injection nozzle body.

Preferably, heating resistance wires are wound around the heating jacket.

Compared with the prior art, the present invention provides a sliding rod single-point needle valve hot runner system, which has the following beneficial effects:

The sliding rod single-point needle valve hot runner system of the present invention, the principle of the invention is to install the cylinder on the side of the hot nozzle, and use the angled sliding rod to push the valve needle up and down, open or close the valve needle glue port, The cylinder is supported on one side of the nozzle by the support column, far away from the heating end of the hot nozzle. The structure is simple and the disassembly and assembly is more convenient, so that the sliding rod single-point needle valve hot runner system has the following advantages: 1. The cylinder is installed on the side of the hot nozzle , The hot nozzle radiates less heat, the cylinder temperature is low, and the sealing system has a long service life; 2. The runner of the hot nozzle can be designed to be larger, which can reduce the injection pressure, the valve needle opens and closes more stably, the glue port is beautiful, and the product is qualified High rate; 3. The hot nozzle structure is simple, easy to disassemble, can simplify the production process, shorten the production cycle, high efficiency, and low cost.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings:

Figure 1 is a schematic view of the closed state of the valve needle of the sliding rod single-point needle valve hot runner system proposed by the present invention;

Fig. 2 is a structural schematic diagram of the valve needle in the open state of the sliding rod single-point needle valve hot runner system proposed by the present invention;

Figure 3 is a schematic diagram of the structure of the injection nozzle jacket proposed by the present invention;

In the figure: 1. Oil cylinder assembly; 2. Support column; 3. Injection nozzle body; 4. Slide valve needle fixing rod; 5. Bearing; 6. Heating jacket; 7. Injection nozzle cover; 8. Hot nozzle body; 9. , Valve needle; 10. Hot nozzle bushing; 11. Jacket fixing ring; 12. Inner hole; 13, Upper hole; 14. Cover body; 15. Retaining ring; 16. Heat dissipation protrusion.

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 a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" The orientation or positional relationship of other indications is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation and The azimuth structure and operation cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

Please refer to Figures 1-3, the present invention provides a technical solution:

The sliding rod single-point needle valve hot runner system includes an injection nozzle body 3 and a heating jacket 6. The injection nozzle body 3 is installed and fixed at the inner position of the heating jacket 6. The heating jacket 6 is wound with heating resistance wires and the heating jacket 6 The outer side of the sleeve is sleeved with an injection nozzle cover 7, which includes an inner hole 12, an upper hole 13, a sleeve body 14, a retaining ring 15 and a heat dissipation protrusion 16. The sleeve body 14 is provided with an inner hole 12, the sleeve body 14 A retaining ring 15 is connected to the right end of the sleeve by welding, the surface of the sleeve body 14 is provided with heat dissipation protrusions 16, the upper end of the sleeve body 14 is provided with an upper hole 13, and the inner diameter of the injection nozzle sleeve 7 is equal to the outer diameter of the heating sleeve 6, The outer right end of the injection nozzle cover 7 is provided with a cover fixing ring 11, the cover fixing ring 11 is a ring structure, and the inner side of the cover fixing ring 11 is provided with a groove, and the right end of the injection nozzle body 3 is provided with a hot nozzle body 8. A hot nozzle bushing 10 is provided at the outer position of the hot nozzle body 8. The injection nozzle cover 7 and the hot nozzle bushing 10 are fixedly connected by a buckle through the cover fixing ring 11. The injection nozzle body 3 is provided with a valve needle 9 for injection A sliding valve needle fixing rod 4 is provided inside the nozzle body 3 and located on the left side of the valve needle 9, and a bearing 5 is provided inside the injection nozzle body 3 and located on the left side of the sliding valve needle fixing rod 4, and the upper end of the injection nozzle body 3 There are two support columns 2 connected by welding, and the two support columns 2 are installed and fixed between the oil cylinder assembly 1 and the injection nozzle body 3. The upper end of the support column 2 is provided with oil Cylinder assembly 1.

The working principle and use process of the present invention: After the present invention is installed, install the oil cylinder assembly 1 on the side of the hot nozzle body 8, and use an angled sliding rod to push the valve needle 9 up and down, open or close the valve needle pouring When the valve pin 9 is lifted by the oil cylinder assembly 1, the gate will open. At this time, the melt inside the main runner of the injection mold will be injected into the mold through the gate of the hot runner. When the oil cylinder assembly 1 drives the valve needle 9 down, the valve needle 9 will block the hot runner gate, thereby stopping the injection. The oil cylinder assembly 1 is supported by the support column 2 on the side of the hot nozzle body 8, away from the heating Sleeve 6, simple structure, more convenient disassembly and assembly. At this time, the oil cylinder assembly 1 will start to work, then the oil cylinder assembly 1 will drive the sliding rod to move, and then the back and forth movement of the angled sliding rod will drive the valve needle 9 The lifting, thus realizing the normal control work.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

The sliding rod single-point needle valve hot runner system of the present invention, the principle of the invention is to install the cylinder on the side of the hot nozzle, and use the angled sliding rod to push the valve needle up and down, open or close the valve needle glue port, The cylinder is supported on one side of the nozzle by the support column, far away from the heating end of the hot nozzle. The structure is simple and the disassembly and assembly is more convenient, so that the sliding rod single-point needle valve hot runner system has the following advantages: 1. The cylinder is installed on the side of the hot nozzle , The hot nozzle radiates less heat, the cylinder temperature is low, and the sealing system has a long service life; 2. The runner of the hot nozzle can be designed to be larger, which can reduce the injection pressure, the valve needle opens and closes more stably, the glue port is beautiful, and the product is qualified High rate; 3. The hot nozzle structure is simple, easy to disassemble, can simplify the production process, shorten the production cycle, high efficiency and low cost.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present invention and implement it, and cannot limit the scope of protection of the present invention. All equivalent changes or modifications made by the substance shall be covered by the protection scope of the present invention.

Claims

The sliding rod single-point needle valve hot runner system includes an injection nozzle main body (3) and a heating jacket (6), characterized in that: the injection nozzle main body (3) is installed and fixed at the inner position of the heating jacket (6), so The outer side of the heating jacket (6) is sleeved with an injection nozzle cover (7), the outer right end of the injection nozzle cover (7) is provided with a cover fixing ring (11), and the injection nozzle body (3) A hot nozzle body (8) is provided at the right end, a hot nozzle bushing (10) is provided at a position outside the hot nozzle body (8), and a valve needle (9) is provided inside the injection nozzle body (3), so A sliding valve needle fixing rod (4) is provided inside the injection nozzle body (3) and located on the left side of the valve needle (9), and the injection nozzle body (3) is located inside the sliding valve needle fixing rod (4) A bearing (5) is provided on the left side of the injection nozzle body (3), a support column (2) is connected to the upper end of the injection nozzle body (3) by welding, and an oil cylinder assembly (1) is provided on the upper end of the support column (2).
The sliding rod single-point needle valve hot runner system according to claim 1, characterized in that: the injection nozzle jacket (7) includes an inner hole (12), an upper hole (13), a sleeve body (14), and a retaining ring (15) and heat dissipation protrusions (16), the sleeve body (14) is provided with an inner hole (12), the right end of the sleeve body (14) is connected with a retaining ring (15) by welding, the A heat dissipation protrusion (16) is provided on the surface of the sleeve body (14), and an upper hole (13) is provided at the upper end position of the sleeve body (14).
The sliding rod single-point needle valve hot runner system according to claim 1, characterized in that: the inner diameter of the injection nozzle jacket (7) is equal to the outer diameter of the heating jacket (6).
The sliding rod single-point needle valve hot runner system according to claim 1, wherein the injection nozzle cover (7) and the hot nozzle bushing (10) are fixedly connected by a buckle with a cover fixing ring (11).
The sliding rod single-point needle valve hot runner system according to claim 1, characterized in that the outer casing fixing ring (11) is a ring structure, and the inner side of the outer casing fixing ring (11) is provided with a groove.
The sliding rod single-point needle valve hot runner system according to claim 1, characterized in that there are two support columns (2), and the two support columns (2) are both installed and fixed on the oil cylinder assembly ( 1) and the position between the injection nozzle body (3).
The sliding rod single-point needle valve hot runner system according to claim 1, wherein a heating resistance wire is wound around the heating jacket (6).