CN205058508U - A self -bleeding mechanism for injection mold - Google Patents
A self -bleeding mechanism for injection mold Download PDFInfo
- Publication number
- CN205058508U CN205058508U CN201520843665.9U CN201520843665U CN205058508U CN 205058508 U CN205058508 U CN 205058508U CN 201520843665 U CN201520843665 U CN 201520843665U CN 205058508 U CN205058508 U CN 205058508U
- Authority
- CN
- China
- Prior art keywords
- spool
- valve pocket
- head
- injection mold
- case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a self -bleeding mechanism for injection mold, including valve barrel, case, driving spring and regulation needle. The radius conical surface of head and the round hole face at middle part are drawn together to the inner chamber bread of valve barrel, this valve barrel is inlayed in the carminative template of needs, the case is for cylindrical and radially set up a round tapered groove on the surface at middle part, the head of this case is the radius conical head, this case and valve barrel coaxially the cartridge in the inner chamber of valve barrel, the driving spring is installed in the bottom of case to all the time, be in compression state, the head of adjusting the needle be the nose cone, should adjust needle and case perpendicularily the screw install in the template to during the round tapered groove on the case is inserted to the nose cone of this regulation needle, with the clearance of opening of control case. The utility model discloses a self -bleeding mechanism for injection mold can not only effectively get rid of the gas among the injection mold, reduces the flow resistance of plastic fuse -element, still can shorten the injection moulding cycle.
Description
Technical field
The utility model relates to a kind of automatic vent mechanism for injection mold.
Background technology
From space angle, injection mold is a kind of displacement apparatus, namely while plastic cement melt injects die cavity, displaces original air and other gas in die cavity.Gas in injection mold not only comprises the air in running gate system and die cavity, also comprises the decomposition gas that plastic melt produces, and the water vapour that in plastics, moisture at high temperature becomes.During injection moulding, these gases are driven and are compressed to dead angle by the plastic melt of high temperature, form the air chamber of multiple HTHP, the counter-pressure of the air chamber formation of these high pressure stops the normal mold filling fast of melt, the air chamber of these HTHPs penetrates into melt inside simultaneously, cause insufficient fill, make the inside of moulding produce the defects such as pore, cavity, tissue looseness.Therefore, in injection moulding process, must in time these gas be discharged outside mould.As a rule, various gas is discharged by the die joint of mould, edge piece gap, push rod gap, but the dead angle of the Various Complex die cavities such as the meet of the end of melt flows, multiply melt, the bottom of die cavity blind hole, the bottom of reinforcement, the gas of these positions all cannot be discharged, and these positions are often left in the basket when Design of Dies.Traditional way reduces injection moulding speed, and melt is slowly advanced, and discharges set apart to gas.But so not only extend molding cycle, and the temperature of melt reduces very soon, now just need to improve injection pressure, residual stress improves, and easily produces the problems such as buckling deformation after the plastic demoulding for this reason thereupon.
Utility model content
The purpose of this utility model is to overcome the defect of prior art and provides a kind of automatic vent mechanism for injection mold, it effectively can not only get rid of the gas in injection mold, reduce the flow resistance of plastic cement melt, improve the shaping qualification rate of product, also can shortening injection molding cycle.
The purpose of this utility model is achieved in that a kind of automatic vent mechanism for injection mold, comprises valve pocket, spool, driving spring and adjustment needle, wherein:
The inner cavity surface of described valve pocket comprises the rounding conical surface of head and the circular hole face at middle part; This valve pocket is embedded in the template needing exhaust;
Described spool is cylindrical and diameter is less than the diameter in the circular hole face of described valve pocket, and on the center outer surface of this spool, radial direction offers a cone-shaped groove; The head of this spool is the rounding conehead with the rounding conical surface adaptation of the head of described valve pocket; This spool and described valve pocket are inserted in the inner chamber of described valve pocket coaxially;
Described driving spring is installed on the bottom of described spool, and is in compressive state all the time, for opening of described spool provides power;
The head of described adjustment needle is nose cone, and this adjustment needle and described spool vertically screw thread are installed in described template, and the nose cone of this adjustment needle is inserted in the cone-shaped groove on described spool, to control the opening clearance of described spool.
The above-mentioned automatic vent mechanism for injection mold, wherein, the bottom of described valve pocket is provided with the placing chamber for installing described driving spring.
The above-mentioned automatic vent mechanism for injection mold, wherein, the outer shape of described valve pocket is cylindrical, four prism type or is irregular abnormity.
Automatic vent mechanism for injection mold of the present utility model, adopt adjustable needle to control the exhaust clearance between spool and valve pocket, effectively can not only get rid of the gas in injection mold, reduce the flow resistance of plastic cement melt, improve the shaping qualification rate of product, also can shortening injection molding cycle.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automatic vent mechanism for injection mold of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
First refer to Fig. 1, the automatic vent mechanism for injection mold of the present utility model, is arranged between the template 10 of injection mold and gripper shoe 50, and automatic vent mechanism comprises valve pocket 1, spool 2, driving spring 3 and regulates needle 4, wherein:
Template 10 is provided with installing hole for installing valve pocket 1 and vertical with installing hole and for installing the jack regulating needle 4, the rear portion of jack is provided with internal thread;
The outer shape of valve pocket 1 is cylindrical, four prism type or is irregular abnormity, and the bottom of valve pocket 1 is provided with the placing chamber for installing driving spring 3; The inner cavity surface of this valve pocket 1 comprises the rounding conical surface of head and the circular hole face at middle part; This valve pocket 1 is embedded in the installing hole of the template 10 needing exhaust;
Spool 2 is cylindrical and diameter is less than the diameter in the circular hole face of valve pocket 1, and on the center outer surface of this spool 2, radial direction offers a cone-shaped groove; The head of this spool 2 is the rounding conehead 20 with the rounding conical surface adaptation of the head of valve pocket 1; This spool 2 is inserted in the inner chamber of valve pocket 1 with valve pocket 1 coaxially;
Driving spring 3 is installed on the bottom of spool 2, and is in compressive state all the time, for opening of spool 2 provides power; The elastic force of driving spring 3 need be greater than the frictional force between spool 2 and valve pocket 1, is as the criterion can flick spool 2;
The head regulating needle 4 is nose cone 40, the rear portion of this adjustment needle 4 is provided with the external screw thread with the jack threaded engagement in template 10, this adjustment needle 4 and spool 2 vertically screw thread are installed in the jack of template 10, and the nose cone 40 of this adjustment needle 4 is inserted in the cone-shaped groove on spool 2, to control the opening clearance of spool 2.
Automatic vent mechanism for injection mold of the present utility model, according to the gap of the overflow edge value of specified material (the overflow edge value of common used material: ABS is 0.04, PA is 0.015, PBT be 0.02) setting valve pocket 1 with spool 2, screw in and regulate needle 4, promote spool 2 to move up and down, to regulate the contact area of corresponding circle conical socket on the taper surface of the nose cone 40 of needle 4 and spool 2, contact area is larger, valve pocket 1 is less with the exhaust clearance of spool 2, contact area is less, and valve pocket 1 is larger with the exhaust clearance of spool 2.Gap should be less than the overflow edge value of material, otherwise will produce overlap.Due to the effect of driving spring 3, spool 2 is made to be in open mode, when plastic cement melt advances, various gas is discharged from the gap that spool 2 is opened, reach the object of setting exhaust clearance, when plastic cement melt reaches exhaust gear, spool 2 is subject to the pressure of plastic cement melt and closes, and avoids product to produce overlap.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, when not departing from spirit and scope of the present utility model, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present utility model, should be limited by each claim.
Claims (3)
1., for an automatic vent mechanism for injection mold, comprise valve pocket, spool, driving spring and adjustment needle, it is characterized in that,
The inner cavity surface of described valve pocket comprises the rounding conical surface of head and the circular hole face at middle part; This valve pocket is embedded in the template needing exhaust;
Described spool is cylindrical and diameter is less than the diameter in the circular hole face of described valve pocket, and on the center outer surface of this spool, radial direction offers a cone-shaped groove; The head of this spool is the rounding conehead with the rounding conical surface adaptation of the head of described valve pocket; This spool and described valve pocket are inserted in the inner chamber of described valve pocket coaxially;
Described driving spring is installed on the bottom of described spool, and is in compressive state all the time, for opening of described spool provides power;
The head of described adjustment needle is nose cone, and this adjustment needle and described spool vertically screw thread are installed in described template, and the nose cone of this adjustment needle is inserted in the cone-shaped groove on described spool, to control the opening clearance of described spool.
2. the automatic vent mechanism for injection mold according to claim 1, is characterized in that, the bottom of described valve pocket is provided with the placing chamber for installing described driving spring.
3. the automatic vent mechanism for injection mold according to claim 1 and 2, is characterized in that, the outer shape of described valve pocket is cylindrical, four prism type or is irregular abnormity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520843665.9U CN205058508U (en) | 2015-10-28 | 2015-10-28 | A self -bleeding mechanism for injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520843665.9U CN205058508U (en) | 2015-10-28 | 2015-10-28 | A self -bleeding mechanism for injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205058508U true CN205058508U (en) | 2016-03-02 |
Family
ID=55385106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520843665.9U Expired - Fee Related CN205058508U (en) | 2015-10-28 | 2015-10-28 | A self -bleeding mechanism for injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205058508U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107618160A (en) * | 2017-02-07 | 2018-01-23 | 宁波三顺机械设备科技有限公司 | A kind of vacuum injection mould and its injection technique |
| CN108859012A (en) * | 2018-07-18 | 2018-11-23 | 柳道万和(苏州)热流道系统有限公司 | For the gas-assisted molding device of injection mold and with its hot runner system |
| CN112848136A (en) * | 2020-12-31 | 2021-05-28 | 宁波福尔达智能科技股份有限公司 | Gas-assisted mold gas needle and gas-assisted device |
| CN115488319A (en) * | 2022-11-18 | 2022-12-20 | 燕山大学 | Exhaust mechanism of aluminum alloy wheel hub low pressure casting mould |
-
2015
- 2015-10-28 CN CN201520843665.9U patent/CN205058508U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107618160A (en) * | 2017-02-07 | 2018-01-23 | 宁波三顺机械设备科技有限公司 | A kind of vacuum injection mould and its injection technique |
| CN108859012A (en) * | 2018-07-18 | 2018-11-23 | 柳道万和(苏州)热流道系统有限公司 | For the gas-assisted molding device of injection mold and with its hot runner system |
| CN108859012B (en) * | 2018-07-18 | 2024-03-08 | 柳道万和(苏州)热流道系统有限公司 | Gas auxiliary forming device for injection mold and hot runner system with same |
| CN112848136A (en) * | 2020-12-31 | 2021-05-28 | 宁波福尔达智能科技股份有限公司 | Gas-assisted mold gas needle and gas-assisted device |
| CN115488319A (en) * | 2022-11-18 | 2022-12-20 | 燕山大学 | Exhaust mechanism of aluminum alloy wheel hub low pressure casting mould |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20201028 |