CN201338373Y - Air needle for air-assisted plastic injection molding system - Google Patents
Air needle for air-assisted plastic injection molding system Download PDFInfo
- Publication number
- CN201338373Y CN201338373Y CNU2008202068051U CN200820206805U CN201338373Y CN 201338373 Y CN201338373 Y CN 201338373Y CN U2008202068051 U CNU2008202068051 U CN U2008202068051U CN 200820206805 U CN200820206805 U CN 200820206805U CN 201338373 Y CN201338373 Y CN 201338373Y
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- China
- Prior art keywords
- air
- passage
- injection molding
- plastic injection
- needle guard
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Abstract
The utility model discloses an air needle for air-assisted plastic injection molding system, which has the design key points that a needle sleeve is mounted on a mould, the needle sleeve is provided with a channel for assisting injection airflow to enter the mould forming hollow cavity, an inner needle is assembled in the channel, a ventilation gap is formed between the inner needle and the channel, the ventilation gap is divided into an air inlet segment and an air outlet segment communicated with the air inlet segment, the gap of the air outlet segment is smaller than the gap of the air inlet segment. The utility model aims to provide an air needle for air-assisted plastic injection molding system, which has simple structure, low production cost, convenient assembly, mounting and maintenance.
Description
[technical field]
The present invention relates to gas-guiding structure in the injection molding apparatus of gas filling plastic body of a kind of manufacturing after with pressurization, furtherly be air tube in the air-flow assisted plastic injection molding system.
[background technology]
Inject gas-pressurized and come the plastic product of moulding hollow in plastic melt, not only the production cost reduces greatly, and product weight also alleviated, and therefore uses the air-flow assisted plastic injection molding to obtain using widely in plastic products processing.
The general air valve that uses in the existing air-flow assisted plastic injection molding system, its valve port diameter ratio connects big.Existing air valve generally is made up of with the valve rod of by-pass valve control folding with being contained in the valve body valve body, for example moving of valve rod regulated and control in shift fork, back-moving spring etc. and mounting groove or the hole of offering above-mentioned accessory on mould need to make other accessory when such air valve uses, and then the conducting or the disconnection of realization air valve gas circuit, complex structure is not easy to dismounting, installation and maintenance and use.
[summary of the invention]
The present invention has overcome the deficiencies in the prior art, provide simple in structure, production cost is low and the air-flow assisted plastic injection molding system of for convenience detach, installation and maintenance in air tube.
In order to address the above problem, the present invention adopts following technical proposals:
Air tube in the air-flow assisted plastic injection molding system, it is characterized in that comprising the needle guard that is installed on the mould, needle guard is provided with for the auxiliary injection air-flow and enters the interior passage of mould molding cavity, be equipped with interior pin in the passage, form airspace between interior pin and the described passage, the section of giving vent to anger that described airspace is divided into the air inlet section and communicates with the air inlet section, the gap of the described section of giving vent to anger is less than the gap of described air inlet section;
Air tube in the air-flow assisted plastic injection molding system as mentioned above, it is characterized in that described passage is the cylindrical hole that runs through its center, the flat part that pin is divided into cylindrical segment and forms in the cutting of cylinder bilateral symmetry in described, gap between cylindrical segment and the vias inner walls forms the described section of giving vent to anger, and the gap between flat part and the vias inner walls forms described air inlet section;
Air tube in the air-flow assisted plastic injection molding system is characterized in that described passage internal diameter between 3.0mm～3.01mm as mentioned above, and described cylindrical segment external diameter is between 2.93mm～2.95mm;
Air tube in the air-flow assisted plastic injection molding system is characterized in that described cylindrical segment length is 4mm as mentioned above;
Air tube in the air-flow assisted plastic injection molding system is characterized in that described passage inlet end is provided with internal thread as mentioned above, and described interior pin residue section is provided with and the friction tight screw thread of above-mentioned internal thread, and an interior pin residue section tail end stretches out outside the passage and is provided with handle;
The air tube that uses the air-flow assisted plastic injection molding to use as mentioned above is characterized in that described needle guard is provided with and is used for the external screw thread that is threaded with injection mold that the needle guard outlet side extend in the mould molding cavity, and the needle guard outlet side is provided with inner hexagonal hole;
Air tube in the air-flow assisted plastic injection molding system is characterized in that described needle guard circumference is provided with the table top of energy roof pressure on the mould molding cavity inner wall as mentioned above, and table top is provided with annular groove, is provided with high temperature resistant cushion rubber in the annular groove.
The invention has the beneficial effects as follows:
1, needle guard is provided with for the auxiliary injection air-flow and enters the interior passage of mould molding cavity, be equipped with interior pin in the passage, form the air inlet section of ventilation usefulness and the section of giving vent to anger that directly communicates with the air inlet section between interior pin and the passage, the gap of the section of giving vent to anger is 4mm less than the gap of air inlet section and the segment length of giving vent to anger, so both guaranteed that the conducting of auxiliary injection air-flow entered in the mould molding cavity, can prevent again in the reverse flow channel of plastic melt, make the section of giving vent to anger locate the stable gas pressure of air-flow, air-flow assisted injection molding yield rate height;
2, interior pin is fastened on by being threaded in the passage of needle guard, and interior pin residue section is stretched out outside the passage and is provided with handle, is convenient to operator's turn handle interior pin is screwed in the needle guard, and overall structure is simple, installation, dismounting, maintenance and easy to use; Needle guard is provided with and is used for the external screw thread that is threaded with injection mold, the needle guard outlet side extend in the mould molding cavity, the needle guard outlet side is provided with and is used to the inner hexagonal hole installing, dismantle, only need insert in the inner hexagonal hole and turn with instrument during installation, can be easily with the needle guard installation or removal;
3, needle guard is provided with the table top of energy roof pressure on the mould molding cavity inner wall, and table top is provided with annular groove, is provided with high temperature resistant cushion rubber in the annular groove, avoids the gas leakage of needle guard and mould molding cavity inner wall cooperation place, thereby ensures the injected-formative plastic quality of item.
[description of drawings]
Fig. 1 is needle guard and interior pin explosive view;
Fig. 2 is needle guard and interior pin assembling vertical view;
Fig. 3 is an A-A cut-away view among Fig. 2;
Fig. 4 is a C place enlarged drawing among Fig. 3;
Fig. 5 is a B-B cut-away view among Fig. 2;
Fig. 6 is the needle guard cut-away view;
Fig. 7 is the scheme of installation of the present invention on mould.
[specific embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention:
As shown in the figure, air tube in the air-flow assisted plastic injection molding system, comprise the needle guard 1 that is installed on the mould, needle guard 1 is provided with for the auxiliary injection air-flow and enters the interior passage 11 of mould molding cavity, pin 2 in being equipped with in the passage 11, form airspace 3 between interior pin 2 and the passage 11, the section of giving vent to anger 31 that airspace 3 is divided into air inlet section 32 and communicates with air inlet section 32, the gap of the section of giving vent to anger 31 is less than the gap of air inlet section 32.
Among the present invention, passage 11 is for running through the cylindrical hole at its center, the flat part 26 that interior pin 2 is divided into cylindrical segment 25 and forms in the cutting of cylinder bilateral symmetry, gap between cylindrical segment 25 and passage 11 inwalls forms the section of giving vent to anger 31, and the gap between flat part 26 and passage 11 inwalls forms air inlet section 32.Wherein, passage 11 internal diameters are between 3.0mm～3.01mm, and cylindrical segment 25 length are 4mm, and cylindrical segment 25 external diameters are between 2.93mm～2.95mm.Because the section of giving vent to anger 31 is 4mm less than air inlet section 32 and the section of giving vent to anger 31 length, has so both guaranteed that the conducting of auxiliary injection air-flow enters in the mould molding cavity 6, can prevent again in the reverse flow channel 11 of plastic melt.
As shown in Figure 5 and Figure 6, needle guard 1 is cylindrical, and needle guard 1 circumference is provided with the table top 14 of energy roof pressure on mould molding cavity 6 inwalls, and table top 14 is provided with annular groove 140, is provided with high temperature resistant cushion rubber 15 in the annular groove 140.Avoid the gas leakage of needle guard 1 and mould molding cavity 6 inwall cooperation places, thereby ensure the injected-formative plastic quality of item.
Installation of the present invention, use are as follows: at first interior pin 2 is inserted and rotary handle 22 from needle guard 1 inlet end, pin 2 screws with needle guard 1 in making; Then needle guard 1 is aimed at the air admission hole on mould molding cavity 6 inwalls, be provided with the internal thread that cooperates with external screw thread 12 on the needle guard 1 in the air admission hole, this air admission hole is communicated with airflow line 4 on the mould, with instrument such as die nut needle guard 1 is screwed in the air admission hole again, table top 14 on the needle guard 1 is ridden on the cavity inner wall, and this moment, high temperature resistant cushion rubber 15 was close on mould molding cavity 6 inwalls in case leak-stopping gas.During use, only the auxiliary injection air-flow need be connected suction nozzle 5 places gets final product air inlet, simple in structure, easy to use.
Claims (7)
1, the air tube in the air-flow assisted plastic injection molding system, it is characterized in that comprising the needle guard (1) that is installed on the mould, needle guard (1) is provided with for the auxiliary injection air-flow and enters the interior passage (11) of mould molding cavity, be equipped with interior pin (2) in the passage (11), form airspace (3) between interior pin (2) and the described passage (11), the section of giving vent to anger (31) that described airspace (3) is divided into air inlet section (32) and communicates with air inlet section (32), the gap of the described section of giving vent to anger (31) is less than the gap of described air inlet section (32).
2, according to the air tube in the described air-flow assisted plastic injection molding system of claim 1, it is characterized in that described passage (11) is for running through the cylindrical hole at its center, the flat part (26) that pin (2) is divided into cylindrical segment (25) and forms in the cutting of cylinder bilateral symmetry in described, gap between cylindrical segment (25) and passage (11) inwall forms the described section of giving vent to anger (31), and the gap between flat part (26) and passage (11) inwall forms described air inlet section (32).
3, according to the air tube in the described air-flow assisted plastic injection molding system of claim 2, it is characterized in that described passage (11) internal diameter between 3.0mm～3.01mm, described cylindrical segment (25) external diameter is between 2.93mm～2.95mm.
4,, it is characterized in that described cylindrical segment (25) length is 4mm according to the air tube in the described air-flow assisted plastic injection molding system of claim 2.
5, according to the air tube in claim 1 or 2 or the 3 or 4 described air-flow assisted plastic injection molding systems, it is characterized in that described passage (11) inlet end is provided with internal thread (110), described interior pin (2) residue section is provided with and the friction tight screw thread of above-mentioned internal thread (110) (21), and interior pin (a 2) residue section tail end stretches out outside the passage (11) and is provided with handle (22).
6, the air tube of using according to the described use air-flow of claim 5 assisted plastic injection molding, it is characterized in that described needle guard (1) is provided with is used for the external screw thread (12) that is threaded with injection mold, needle guard (1) outlet side extend in the mould molding cavity, and needle guard (1) outlet side is provided with inner hexagonal hole (13).
7, according to the air tube in the described air-flow assisted plastic injection molding system of claim 5, it is characterized in that described needle guard (1) circumference is provided with the table top (14) of energy roof pressure on the mould molding cavity inner wall, table top (14) is provided with annular groove (140), is provided with high temperature resistant cushion rubber (15) in the annular groove (140).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202068051U CN201338373Y (en) | 2008-12-30 | 2008-12-30 | Air needle for air-assisted plastic injection molding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202068051U CN201338373Y (en) | 2008-12-30 | 2008-12-30 | Air needle for air-assisted plastic injection molding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201338373Y true CN201338373Y (en) | 2009-11-04 |
Family
ID=41233910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202068051U Expired - Fee Related CN201338373Y (en) | 2008-12-30 | 2008-12-30 | Air needle for air-assisted plastic injection molding system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201338373Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767418A (en) * | 2008-12-30 | 2010-07-07 | 中山志和家电制品有限公司 | Air pin in gas-assisted plastic injection molding system |
| CN102837393A (en) * | 2012-06-05 | 2012-12-26 | 浙江工业大学 | Annular arc discharge-type auxiliary injection molding air needle of external gas |
-
2008
- 2008-12-30 CN CNU2008202068051U patent/CN201338373Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767418A (en) * | 2008-12-30 | 2010-07-07 | 中山志和家电制品有限公司 | Air pin in gas-assisted plastic injection molding system |
| CN102837393A (en) * | 2012-06-05 | 2012-12-26 | 浙江工业大学 | Annular arc discharge-type auxiliary injection molding air needle of external gas |
| CN102837393B (en) * | 2012-06-05 | 2014-11-12 | 浙江工业大学 | Annular arc discharge-type auxiliary injection molding air needle of external gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20121230 |