CN207808344U - A kind of valve needle of hot runner of double sealing structure - Google Patents

Abstract

The utility model discloses a kind of valve needle of hot runner of double sealing structure, including needle ontology, the outer surface of the needle ontology is fixedly installed wearing layer, and the bottom fixing sleeve of needle ontology is connected to the first limiting plate, the bottom of the needle ontology slidably connects the second limiting plate at the top position of the first limiting plate, and the first sealing shroud is fixedly connected between first limiting plate and the second limiting plate.The utility model passes through buffer spring; on the one hand when needle moves reciprocatingly in the cylinder; the self structure of effective protection needle; impact force caused by collision is done and is cut down to greatest extent; on the other hand the synchronous use of buffer spring combination sealing shroud; the sealing performance of needle in the cylinder can be improved, form double sealing structure；By the wearing layer of potassium steel material, the wear-resisting property of needle can be improved, improve the practical performance of needle, needle is allowed to be more applicable for the use of hot runner system.

Description

A kind of valve needle of hot runner of double sealing structure

Technical field

The utility model is related to needle technical field more particularly to a kind of valve needle of hot runner of double sealing structure.

Background technology

Hot flow path uses in injection mold, the heating group plastic pellet of thawing being injected into the cavity of mold Part system, hot runner mould is to pass through the running channel of traditional type mold or shree plates mold and runner to heat, when each forming A kind of brand-new construction that runner and running channel need not be taken out, is divided into open hot flow path and valve needle type hot runner, wherein needle Formula hot flow path be also a kind of each major heat flow road supplier in the world be provided which using very universal hot runner system

But the needle occurred currently on the market is not only complicated, but also have a single function, it is not particularly suited for hot flow path The use of system, needle can be squeezed by the strength of thermoplastic fluid in normal use, generate larger frictional force, long and long It, can cause the abrasion of needle, thereby reduce the air-tightness of needle；Needle in the presence of cylinder, can be in hot flow path It moves reciprocatingly, but the component of cushioning effect can be played due to lacking in needle self structure so that needle is being done back and forth It when movement, often collides with the inner wall of cylinder, in turn results in the damage of needle, after needle damage, replacement difficulty is higher, is This, we have proposed a kind of valve needle of hot runner of double sealing structure.

Utility model content

Purpose of the utility model is to solve needle in the prior art is not only complicated, but also have a single function, and The use of hot runner system is not suitable for it, needle can be squeezed by the strength of thermoplastic fluid, be generated larger in normal use Frictional force can cause the abrasion of needle in the course of time, thereby reduce the air-tightness of needle；Needle in the presence of cylinder, can To move reciprocatingly in hot flow path, but the component of cushioning effect can be played due to lacking in needle self structure so that Needle often collides with the inner wall of cylinder when moving reciprocatingly, and in turn results in the damage of needle and is replaced after needle damage The higher problem of difficulty, and a kind of valve needle of hot runner of the double sealing structure proposed.

To achieve the goals above, the utility model uses following technical solution：A kind of hot-fluid of double sealing structure The outer surface of road needle, including needle ontology, the needle ontology is fixedly installed wearing layer, and the bottom of needle ontology is fixed It is socketed with the first limiting plate, the bottom of the needle ontology slidably connects the second limit at the top position of the first limiting plate Position plate is fixedly connected with the first sealing shroud, and the first limiting plate and the second limit between first limiting plate and the second limiting plate Between the plate of position the first buffer spring, the bottom of the needle ontology are installed at the inner surface position of the first sealing shroud Lower position close to the first limiting plate slidably connects third limiting plate, between first limiting plate and third limiting plate It is fixedly connected with the second sealing shroud, and between the first limiting plate and third limiting plate at the inner surface position of the second sealing shroud It is installed with the second buffer spring, the lower end of the needle ontology is fixedly connected with needle handle.

Preferably, the wearing layer is a kind of component of potassium steel material, and the thickness of wearing layer is 0.5mm, described the One sealing shroud and the second sealing shroud are a kind of component of rubber material.

Preferably, the upper surface of first limiting plate is installed at the inner side of the first buffer spring The lower surface of one limited block, first limiting plate is installed with the second limit at the inner side of the second buffer spring Block.

Preferably, first sealing shroud and the first limiting plate, the first sealing shroud and the second limiting plate, the second sealing shroud with It is connected by strength glue bond between first limiting plate and the second sealing shroud and third limiting plate.

Preferably, the outside of the needle handle is socketed with protective case, and the outer surface of protective case offers external screw thread.

Compared with prior art, the utility model provides a kind of valve needle of hot runner of double sealing structure, has following Advantageous effect：By buffer spring, on the one hand when needle moves reciprocatingly in the cylinder, itself knot of effective protection needle Structure does impact force caused by collision and cuts down to greatest extent, and on the other hand the synchronizing of buffer spring combination sealing shroud makes With can be improved the sealing performance of needle in the cylinder, form double sealing structure；By the wearing layer of potassium steel material, can carry The wear-resisting property of high needle is avoided because needle is in normal use, can be squeezed, be generated larger by the strength of thermoplastic fluid Frictional force, it is in the course of time, scientific and reasonable for structure the problem of the abrasion of needle can be caused, thereby reduce the air-tightness of needle, make With safe ready, the practical performance of needle is improved, needle is allowed to be more applicable for the use of hot runner system.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the mounting structure schematic diagram of the first buffer spring of the utility model；

Fig. 3 is the vertical view of the utility model.

In figure：1, needle ontology；2, wearing layer；3, the first limiting plate；4, the second limiting plate；5, the first sealing shroud；6, One buffer spring；7, third limiting plate；8, the second sealing shroud；9, the second buffer spring；10, needle handle.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.

In the description of the present invention, it should be understood that term "upper", "lower", "front", "rear", "left", "right", The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.

Referring to Fig.1-3, a kind of valve needle of hot runner of double sealing structure, including needle ontology 1, the appearance of needle ontology 1 Face is fixedly installed wearing layer 2, and the bottom fixing sleeve of needle ontology 1 is connected to the first limiting plate 3, and the bottom of needle ontology 1 is leaned on The second limiting plate 4 is slidably connected at the top position of nearly first limiting plate 3, it is solid between the first limiting plate 3 and the second limiting plate 4 Surely it is connected with the first sealing shroud 5, and close to the inner surface position of the first sealing shroud 5 between the first limiting plate 3 and the second limiting plate 4 Place is installed with the first buffer spring 6, and the bottom of needle ontology 1 is slidably connected close to the lower position of the first limiting plate 3 There is third limiting plate 7, the second sealing shroud 8, and the first limiting plate 3 are fixedly connected between the first limiting plate 3 and third limiting plate 7 Between third limiting plate 7 the second buffer spring 9, needle sheet are installed at the inner surface position of the second sealing shroud 8 The lower end of body 1 is fixedly connected with needle handle 10.

For the ease of improving the wear-resisting property of needle ontology 1, in the present embodiment, it is preferred that wearing layer 2 is a kind of potassium steel The component of material, and the thickness of wearing layer 2 is 0.5mm, the first sealing shroud 5 and the second sealing shroud 8 are a kind of rubber material Component.

For the ease of limiting the position of the first buffer spring 6 and the second buffer spring 9, in the present embodiment, it is preferred that first The upper surface of limiting plate 3 is installed with the first limited block, the first limiting plate 3 at the inner side of the first buffer spring 6 Lower surface be installed with the second limited block at the inner side of the second buffer spring 9.

For the ease of fixing the first sealing shroud 5 and the second sealing shroud 8, in the present embodiment, it is preferred that the first sealing shroud 5 with First limiting plate 3, the first sealing shroud 5 and the second limiting plate 4, the second sealing shroud 8 and the first limiting plate 3 and the second sealing shroud 8 with It is connected by strength glue bond between third limiting plate 7.

For the ease of protecting needle handle 10, in the present embodiment, it is preferred that the outside of needle handle 10 is socketed with protective case, protects The outer surface of sheath offers external screw thread.

The operation principle and process for using of the utility model：The lower end of needle ontology 1 passes through in needle handle 10 and cylinder Wall is mutually twisted connection, since the first limiting plate 3 is fixedly connected with needle ontology 1, and the second limiting plate 4 and third limiting plate 7 It is to be flexibly connected with needle ontology 1, when cylinder drives needle ontology 1 to move reciprocatingly, needle ontology 1 can drive the first limit Position plate 3 moves reciprocatingly, when third limiting plate 7 or the second limiting plate 4 are in contact with the shell of cylinder, the first buffer spring 6 Or second buffer spring 9 be extruded, to allow be in straightened condition the first sealing shroud 5 or the second sealing shroud 8 be transformed into fold State has filled up the gap between needle ontology 1 and cylinder inner wall, so as to form double sealing structure, improves needle sheet The sealing performance of body 1 in the cylinder, the wearing layer 2 of potassium steel material, potassium steel have the hardened layer of high rigidity, can resist punching Abrasive wear is hit, potassium steel has excellent abrasion resistance under the conditions of thump abrasive wear, can effectively slow down needle ontology On the one hand 1 abrasion can avoid needle ontology 1 and damage, sealing of the needle ontology 1 in hot flow path on the other hand can be improved Performance.

The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (5)

1. a kind of valve needle of hot runner of double sealing structure, including needle ontology (1), which is characterized in that the needle ontology (1) Outer surface be fixedly installed wearing layer (2), and the bottom fixing sleeve of needle ontology (1) is connected to the first limiting plate (3), the valve The bottom of needle ontology (1) slidably connects the second limiting plate (4) at the top position of the first limiting plate (3), and described first The first sealing shroud (5), and the first limiting plate (3) and the second limit are fixedly connected between limiting plate (3) and the second limiting plate (4) Between plate (4) the first buffer spring (6), the needle sheet are installed at the inner surface position of the first sealing shroud (5) The bottom of body (1) slidably connects third limiting plate (7), first limit close to the lower position of the first limiting plate (3) The second sealing shroud (8), and the first limiting plate (3) and third limiting plate are fixedly connected between plate (3) and third limiting plate (7) (7) the second buffer spring (9), the needle ontology are installed at the inner surface position of the second sealing shroud (8) between (1) lower end is fixedly connected with needle handle (10).

2. a kind of valve needle of hot runner of double sealing structure according to claim 1, which is characterized in that the wearing layer (2) it is a kind of component of potassium steel material, and the thickness of wearing layer (2) is 0.5mm, first sealing shroud (5) and second close Big envelope (8) is a kind of component of rubber material.

3. a kind of valve needle of hot runner of double sealing structure according to claim 1, which is characterized in that first limit The upper surface of plate (3) is installed with the first limited block, first limit at the inner side of the first buffer spring (6) The lower surface of plate (3) is installed with the second limited block at the inner side of the second buffer spring (9).

4. a kind of valve needle of hot runner of double sealing structure according to claim 1, which is characterized in that first sealing Cover (5) and the first limiting plate (3), the first sealing shroud (5) and the second limiting plate (4), the second sealing shroud (8) and the first limiting plate (3) it is connect by strength glue bond between the second sealing shroud (8) and third limiting plate (7).

5. a kind of valve needle of hot runner of double sealing structure according to claim 1, which is characterized in that the needle handle (10) outside is socketed with protective case, and the outer surface of protective case offers external screw thread.