CN214448174U

CN214448174U - Nozzle tip with built-in heater

Info

Publication number: CN214448174U
Application number: CN202120635098.3U
Authority: CN
Inventors: 席连庆
Original assignee: Yudo Qingdao Hot Runner Systems Co ltd
Current assignee: Yudo Qingdao Hot Runner Systems Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-10-22
Anticipated expiration: 2031-03-29

Abstract

The utility model belongs to the technical field of the hot runner, especially, relate to a built-in heater chews point. Not enough to prior art existence, the utility model aims to solve the technical problem that a do not have and chew the body and place in the heater and chew the point, be fit for the open heat of many caves of small products mould and chew, this is chewed the point and not only the diameter is little, does not account for the space, and heating efficiency will be high moreover, and shaping temperature is stable. Including chewing sharp body, it is equipped with heating chamber, isolation layer, runner chamber according to the preface from inside to outside to chew sharp body, the heating chamber is located to chew sharp body center, and heating chamber one end runs through and chew sharp body top surface, it is equipped with the mouth of advancing with runner chamber intercommunication to chew sharp body top surface circumference, the heating intracavity is equipped with the heating rod. The multi-cavity heater is suitable for a multi-cavity system of small products with strict temperature control requirements, the heater is arranged in the nozzle tip, the structure is simple, and the manufacture and the installation are convenient.

Description

Nozzle tip with built-in heater

Technical Field

The utility model belongs to the technical field of the hot runner, especially, relate to a built-in heater chews point.

Background

The hot runner ensures that the plastic of the runner and the sprue is kept in a molten state by a heating method. Because the heating rod and the heating ring are arranged near or in the center of the runner, the whole runner from the nozzle outlet of the injection molding machine to the sprue is in a high-temperature state, so that the plastic in the runner is kept molten, the runner does not need to be opened after the machine is stopped, the solidified material is taken out, and the runner is heated to the required temperature when the machine is started again. The hot runner technology has the advantages of saving raw materials, reducing cost, shortening molding period, improving machine efficiency, improving surface quality and mechanical property of products, improving the surface attractiveness of injection molding products and the like. However, with the wide application of the hot runner technology, various defects appear in different degrees in some high-quality plastic part fields, and for small products, the size is small, the product demand is large, and generally, one mold has multiple cavities. If the multi-cavity die does not use a hot runner, a large amount of cold runner sizing material can be wasted; if a conventional hot runner is used, the requirements and limitations of hot nozzle diameter and hot nozzle spacing are met, and although cold runner glue can be saved, the size of the mold needs to be increased, and the cost of the mold is still increased.

Aiming at a relatively precise small-product plastic part, the conventional hot nozzle occupies a large space, and a customer needs to reduce the product space and the mold cost as much as possible in order to reduce the cost. For dental floss products, the existing design scheme is that a square plate type multi-hole hot nozzle can be normally formed, but the forming temperature is too high, so that the fine line part of the dental floss is easily burnt and broken by high temperature. Specially, develop and do not have and chew built-in heater system of body, the body and external heater are chewed to the characteristics of not having the heat, reduce the space and occupy, and built-in heater improves heating efficiency, manages the shaping temperature better. The technology can greatly save the cost of the client mold, solve the problem of a plurality of small-product multi-hole molds, and lead the hot runner technology of China to develop a larger market.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art existence, the utility model aims to solve the technical problem that a do not have to chew body and heating rod arrange in chewing the point, be fit for the open heat of many caves of small products mould and chew, this is chewed the point and not only the diameter is little, does not account for the space, and heating efficiency will be high moreover, and shaping temperature is stable.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: the utility model provides a built-in heater chews point, is including chewing sharp body, chew sharp body from inside to outside and be equipped with heating chamber, isolation layer, runner chamber according to the preface, the isolation layer is with heating chamber and runner chamber separation, the heating chamber is located and chews sharp body center, and heating chamber one end runs through and chew sharp body top surface, it is equipped with the mouth of advancing with runner chamber intercommunication to chew sharp body top surface circumference, the heating intracavity is equipped with the heating rod.

The tip of the built-in heater is arranged, and the other end of the heating cavity is provided with a conical part.

The built-in heater nozzle tip comprises an inclined flow channel cavity and a vertical flow channel cavity, one end of the inclined flow channel cavity is connected with the glue inlet, the other end of the inclined flow channel cavity is connected with one end of the vertical flow channel cavity, and the other end of the vertical flow channel cavity extends to the nozzle tip pouring gate.

The heating rod is designed in a three-section mode and comprises a heating rod upper portion, a heating rod middle portion and a heating rod lower portion, and the heating rod upper portion is connected with a heating temperature sensing line.

In the nozzle tip with the built-in heater, the middle part and the lower part of the heating rod are arranged in the heating cavity, and the upper part of the heating rod is positioned outside the top of the nozzle tip body.

The nozzle tip of the built-in heater is characterized in that the middle part of the heating rod is provided with a heating body, and the upper part and the lower part of the heating rod are provided with no heating body.

In the nozzle tip of the internal heater, the bottom surface of the lower part of the heating rod is contacted with the top surface of the conical part.

The utility model discloses the built-in heater chews sharp advantage is:

1. the utility model discloses built-in heater chews the point, is fit for being used for the many caves system to the strict small products of accuse temperature requirement, places in the heating rod in chew the point inside, simple structure, and it is all more convenient to make and install, and it is mainly difficult after the volume reduction to interfere with the mould, can reduce the product interval, reduces the mould size, has greatly reduced the cost of many caves system mould, solves the problem of many such small products many caves mould.

2. The utility model discloses built-in heater is chewed sharp, and the mouth of this application is chewed sharp mainly used dental floss product, because dental floss product structure requires that there is a very thin product line between two points of product, namely the dental floss, and the shaping of this line is very high to the temperature requirement, and the temperature is too low, and here is difficult to be shaped; the temperature is too high and the thin line will fuse. The conventional hot nozzles have large diameters, occupy space, have large intervals, and have great difficulty in realizing the size of the multi-cavity die. Therefore, the non-nozzle body internal heating system suitable for the small-product multi-cavity die is designed for reducing the cost.

3. The utility model discloses built-in heater chews the point, is provided with the isolation layer between runner chamber and the heating chamber, can not contact with the heating rod when consequently the sizing material heating of flowing through, has avoided heating rod and sizing material direct contact to influence its life, causes phenomena such as the heating rod rusts, damages.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the nozzle tip body of the present invention;

FIG. 3 is a schematic view of the structure of the heating rod of the present invention;

fig. 4 is a schematic top view of fig. 2 according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, as shown in fig. 1, 2, 3, 4, a built-in heater chewing tip, including chewing tip body 1, chewing tip body 1 is equipped with heating chamber 2, isolation layer 3, runner chamber 4 from inside to outside in proper order, isolation layer 3 separates heating chamber 2 and runner chamber 4, heating chamber 2 is located chewing tip body 1 center, and heating chamber 2 one end runs through chewing tip body 1 top surface, chewing tip body 1 top surface circumference is equipped with the mouth of advancing glue 11 with runner chamber 4 intercommunication, the heating intracavity is equipped with heating rod 5.

Embodiment 2, as shown in fig. 1 and 2, in addition to embodiment 1, the other end of the heating chamber 2 is provided with a tapered portion 6.

Embodiment 3, as shown in fig. 1 and 2, based on embodiment 1, the runner cavity 4 includes an inclined runner cavity 41 and a vertical runner cavity 42, one end of the inclined runner cavity 41 is connected to the glue inlet 11, the other end of the inclined runner cavity 41 is connected to one end of the vertical runner cavity 42, and the other end of the vertical runner cavity 42 extends to the beak gate.

Embodiment 4, as shown in fig. 1 and 3, in addition to any one of embodiments 1 to 3, the heating rod 5 is of a three-stage design, and includes a heating rod upper part 51, a heating rod middle part 52, and a heating rod lower part 53, and the heating rod upper part 51 is connected with a heating temperature sensing wire 54.

Example 5 as shown in fig. 1 and 3, based on example 4, the middle part 52 and the lower part 53 of the heating rod are arranged in the heating cavity 2, and the upper part 51 of the heating rod is positioned outside the top of the tip body 1.

In example 6, as shown in fig. 1 and 3, in example 5, the heating rod middle part 52 is a heating body, and the heating rod upper part 51 and the heating rod lower part 53 are non-heating bodies.

Example 7 as shown in fig. 1, in example 5, the bottom surface of the lower portion 53 of the heating rod was in contact with the top surface of the tapered portion 6.

When in use, the heating rod 5 is arranged in the heating cavity 2 of the nozzle tip body 1, then the heating rod 5 and the nozzle tip body 1 are arranged on the splitter plate, and form a hot runner system with other hot runner fittings. Wherein the upper part 51 of the heating rod 5 passes through the mounting hole of the splitter plate, and the heating temperature-sensing line 54 is connected out from the upper surface of the splitter plate. The heating rod 5 is designed such that the upper heating rod part 51 and the lower heating rod part 53 are non-heating parts and the middle heating rod part 52 is a heating part. The injection molding material is connected with a hot runner system through a locating ring, the rubber material is injected into the injection nozzle body through the matching of the bulb of the injection molding machine and the SR circular arc on the injection nozzle, then the injection nozzle is injected into the flow distribution plate through the flow distribution plate, the rubber material is poured into the flow channel cavity 4 of the nozzle tip body 1 through the flow distribution plate flow channel from the flow distribution plate, at the moment, the rubber material can not be in direct contact with the heating rod 5 due to the arrangement of the isolation layer 3 when flowing through the flow channel cavity 4, the rubber material enters the nozzle tip sprue to be poured into the mold cavity after being heated by the built-in heating rod 5, and the injection molding of the product is completed.

The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments. The present invention can be modified or modified by those skilled in the art without departing from the technical idea of the present invention, and such modifications or modifications naturally fall within the scope of the present invention.

Claims

1. A built-in heater tip is characterized in that: including chewing sharp body (1), it is equipped with heating chamber (2), isolation layer (3), runner chamber (4) according to the preface from inside to outside to chew sharp body (1), isolation layer (3) will heat chamber (2) and runner chamber (4) separation, heating chamber (2) are located and chew sharp body (1) center, and heating chamber (2) one end and run through and chew sharp body (1) top surface, it is equipped with into jiao kou (11) with runner chamber (4) intercommunication to chew sharp body (1) top surface circumference, be equipped with heating rod (5) in heating chamber (2).

2. The built-in heater beak according to claim 1, wherein: the other end of the heating cavity (2) is provided with a conical part (6).

3. The built-in heater beak according to claim 1, wherein: the runner cavity (4) comprises an inclined runner cavity (41) and a vertical runner cavity (42), one end of the inclined runner cavity (41) is connected with the glue inlet (11), the other end of the inclined runner cavity (41) is connected with one end of the vertical runner cavity (42), and the other end of the vertical runner cavity (42) extends to the sprue.

4. A built-in heater tip as claimed in any one of claims 1 to 3, wherein: the heating rod (5) is designed in a three-section mode and comprises a heating rod upper portion (51), a heating rod middle portion (52) and a heating rod lower portion (53), and the heating rod upper portion (51) is connected with a heating temperature sensing line (54).

5. The built-in heater beak according to claim 4, wherein: the heating rod middle part (52) and the heating rod lower part (53) are arranged in the heating cavity (2), and the heating rod upper part (51) is positioned outside the top of the chewing tip body (1).

6. The built-in heater beak according to claim 5, wherein: the heating rod middle part (52) is a heating body, and the heating rod upper part (51) and the heating rod lower part (53) are non-heating bodies.

7. The built-in heater beak according to claim 5, wherein: the bottom surface of the lower part (53) of the heating rod is contacted with the top surface of the conical part (6).