CN210758973U

CN210758973U - Cylinder for needle valve type hot runner system

Info

Publication number: CN210758973U
Application number: CN201921686783.8U
Authority: CN
Inventors: 张友胜
Original assignee: Shenzhen Youhao Hot Runner Technology Co Ltd
Current assignee: Shenzhen Youhao Hot Runner Technology Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-06-16
Anticipated expiration: 2029-10-10

Abstract

The utility model relates to a cylinder technical field discloses a cylinder for needle valve formula hot runner system, include: the cylinder body is arranged below the flow distribution plate, a hot nozzle is fixedly arranged at one end of the cylinder body, which is opposite to the flow distribution plate, a heater is arranged outside the hot nozzle, a nozzle head is arranged at one end of the hot nozzle, which is opposite to the cylinder body, two air vents are arranged outside the cylinder body, an air vent channel communicated with the air vents is arranged inside the cylinder body, a piston rod is arranged on the piston, a valve needle used for controlling the opening and closing of the nozzle head is arranged on the piston rod. Through the positioning adjustment effect of the positioning adjustment device, the valve needle is conveniently fixed on the piston rod, the length of the valve needle is shortened, the thermal expansion amount of the valve needle is reduced, the thermal expansion amount of a hot nozzle is reduced, the thickness of the upper template is reduced, the processing of the upper template is facilitated, the targets of a mold blank pouring gate and the product quality are guaranteed, the maintenance caused by the fact that the valve needle damages the pouring gate is reduced, and the use in a needle valve type hot runner system is met.

Description

Cylinder for needle valve type hot runner system

Technical Field

The utility model relates to a cylinder technical field especially relates to a cylinder for needle valve formula hot runner system.

Background

In the production of plastic products, in order to control the fusion position of plastics and make the products have better appearance and molding quality, a needle valve type hot runner system is often adopted, and an oil cylinder or an air cylinder is used for driving a needle to move to control the closing of a hot nozzle so as to achieve the purpose.

In practical use, a reverse die is often used, or the length of the valve pin is too long due to other reasons, and the too long valve pin is too long due to thermal expansion, so that a die blank is damaged, production stagnation is caused, or the quality of an upper sprue of a product is seriously influenced, and the practical production is influenced.

Therefore, how to reduce the length of the valve needle to make the cylinder meet the actual production requirement is an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to reduce needle length so that the cylinder satisfies the actual production demand.

To this end, according to a first aspect, the embodiments of the present invention disclose a cylinder for a needle valve type hot runner system, including: set up in the cylinder body of flow distribution plate below, the cylinder body for the fixed hot mouth that is equipped with of one end of flow distribution plate, the hot mouth outside be equipped with be used for the heater that the hot mouth provided the heat, hot mouth for the one end of cylinder body is equipped with the mouth head, the cylinder body outside is equipped with two blow vents, the cylinder body inside be equipped with the communicating vent way of blow vent, the inside piston that is equipped with of cylinder body, the both ends that the piston is relative are equipped with piston cover plate and lower piston cover plate respectively, be equipped with the piston rod on the piston, be equipped with on the piston rod and be used for control the needle that the mouth head was opened and close, the needle is.

The utility model discloses further set up to, go up the piston cover plate with the piston cover plate all passes through screw and piston fixed connection down.

The utility model discloses further set up to, the positioning control device including set up in the inside set screw of piston rod, the set screw below is equipped with and is used for adjusting the needle stretches out the spacing cushion of the length of cylinder body.

The utility model discloses further set up to, the upper portion of needle is equipped with the cup, spacing cushion lower part is equipped with and is used for the overlap joint the lower hole groove of cup.

The utility model discloses further set up to, the piston with the contact position of cylinder body is equipped with and is used for gas seal's rubber seal, the cylinder body with the contact position of hot mouth is equipped with and is used for gas seal's rubber seal.

The utility model discloses following beneficial effect has: the cylinder drives the piston to move up and down through air pressure, so that the valve needle is opened and closed, the valve needle is conveniently fixed on the piston rod through the positioning adjustment effect of the positioning adjustment device, the length of the valve needle extending out of the cylinder body is adjustable, the length of the valve needle is shortened, the thermal expansion amount of the valve needle is reduced, the length of a hot nozzle is shortened, the thermal expansion amount of the hot nozzle is reduced, the thickness of an upper template is reduced, the upper template is conveniently processed, the goal of ensuring the quality of a mold blank pouring gate and a product is achieved, the maintenance caused by the fact that the valve needle breaks the pouring gate is reduced, and the use in a needle valve type hot runner system is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a cylinder for a needle valve type hot runner system disclosed in the present embodiment.

Reference numerals: 1. a flow distribution plate; 2. a cylinder body; 3. a hot nozzle; 4. a heater; 5. a mouth head; 6. a piston; 7. an upper piston cover plate; 8. a lower piston cover; 9. a piston rod; 10. a valve needle; 101. a cup head; 102. a valve needle sleeve; 11. a positioning adjustment device; 111. a set screw; 112. limiting cushion blocks; 1121. and (4) a lower hole groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment of the utility model discloses cylinder for needle valve formula hot runner system, as shown in figure 1, include: the cylinder body 2 is arranged below the flow distribution plate 1, the cylinder body 2 is fixedly provided with a hot nozzle 3 relative to one end of the flow distribution plate 1, a heater 4 used for providing heat for the hot nozzle 3 is arranged on the outer side of the hot nozzle 3, a nozzle head 5 is arranged at one end of the hot nozzle 3 relative to the cylinder body 2, two air vents are arranged outside the cylinder body 2, an air vent channel communicated with the air vents is arranged inside the cylinder body 2, a piston 6 is arranged inside the cylinder body 2, two opposite ends of the piston 6 are respectively provided with an upper piston cover plate 7 and a lower piston cover plate 8, a piston rod 9 is arranged on the piston 6, a valve needle 10 used for controlling the opening and closing of the nozzle head 5 is arranged on the piston.

It should be noted that the cylinder drives the piston 6 to move up and down by air pressure to drive the valve needle 10 to move, so as to achieve the purpose of opening and closing the valve needle 10, the piston 6 is arranged in the working chamber, the valve needle 10 is fixed on the piston 6, air passes through the upper air inlet, the piston 6 moves down, air passes through the lower air inlet, the piston 6 moves up, and the cylinder realizes the up-and-down movement of the piston 6 by continuous conversion to drive the valve needle 10 to move. The length of the valve needle 10 is shortened, the thermal expansion amount of the valve needle 10 is reduced, the length of the hot nozzle 3 is shortened, the thermal expansion amount of the hot nozzle 3 is reduced, the thickness of the upper template is reduced, the processing of the upper template is facilitated, the target of the mold blank sprue and the product quality is guaranteed, the maintenance caused by the fact that the valve needle 10 damages the sprue is reduced, and the use in a needle valve type hot runner system is met.

As shown in fig. 1, the upper piston cover plate 7 and the lower piston cover plate 8 are both fixedly connected with the piston 6 through screws.

As shown in fig. 1, the positioning adjustment device 11 includes a positioning screw 111 disposed inside the piston rod 9, and a limit cushion block 112 for adjusting the length of the valve needle 10 extending out of the cylinder 2 is disposed below the positioning screw 111.

As shown in fig. 1, the upper portion of the valve needle 10 is provided with a cup head 101, and the lower portion of the position limiting cushion block 112 is provided with a lower hole groove 1121 for overlapping the cup head 101. In the specific implementation process, a valve needle sleeve 102 is further arranged on the outer side of the cylinder body 2, and the valve needle sleeve 102 is fixedly connected with the cylinder body 2 through screws.

As shown in fig. 1, a rubber seal for gas sealing is provided at a contact position of the piston 6 and the cylinder 2, and a rubber seal for gas sealing is provided at a contact position of the cylinder 2 and the hot nozzle 3.

The working principle is as follows: when the product is injected, the cylinder pulls the valve needle 10 to open the glue outlet, meanwhile, glue enters the runner on the outer side of the cylinder body 2 from the flow distribution plate 1, enters the hot nozzle 3 along the runner on the outer side of the cylinder body 2, converges at one position in the hot nozzle 3, continues to reach the glue outlet downwards, enters the mold cavity to be injected, after the mold cavity is fully injected, the cylinder pushes the valve needle 10 to close the glue outlet downwards, the injection molding is completed at this time, and finally, the mold is opened to eject the product.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A cylinder for a needle valve hot runner system, comprising: a cylinder body (2) arranged below the flow distribution plate (1), a hot nozzle (3) is fixedly arranged at one end of the cylinder body (2) corresponding to the flow distribution plate (1), a heater (4) for providing heat for the hot nozzle (3) is arranged at the outer side of the hot nozzle (3), one end of the hot nozzle (3) opposite to the cylinder body (2) is provided with a nozzle head (5), two air vents are arranged outside the cylinder body (2), air vent channels communicated with the air vents are arranged inside the cylinder body (2), a piston (6) is arranged in the cylinder body (2), an upper piston cover plate (7) and a lower piston cover plate (8) are respectively arranged at two opposite ends of the piston (6), a piston rod (9) is arranged on the piston (6), a valve needle (10) for controlling the opening and closing of the nozzle head (5) is arranged on the piston rod (9), the valve needle (10) is fixed on the piston rod (9) through a positioning adjusting device (11).

2. The cylinder for a needle valve style hot runner system according to claim 1, wherein the upper piston cover plate (7) and the lower piston cover plate (8) are both fixedly connected with the piston (6) by screws.

3. The cylinder for a needle valve type hot runner system according to claim 1, wherein the positioning adjustment device (11) comprises a positioning screw (111) disposed inside the piston rod (9), and a limit pad (112) for adjusting the length of the valve needle (10) extending out of the cylinder body (2) is disposed below the positioning screw (111).

4. The cylinder for a needle valve type hot runner system according to claim 3, wherein the upper portion of the valve needle (10) is provided with a cup (101), and the lower portion of the position limiting cushion block (112) is provided with a lower hole groove (1121) for overlapping the cup (101).

5. The cylinder for a needle valve type hot runner system according to claim 1, wherein a contact position of the piston with the cylinder body (2) is provided with a rubber seal for gas sealing, and a contact position of the cylinder body (2) with the hot nozzle (3) is provided with a rubber seal for gas sealing.