CN202016180U - Novel gas nozzle for gas-assisted molding - Google Patents
Novel gas nozzle for gas-assisted molding Download PDFInfo
- Publication number
- CN202016180U CN202016180U CN2011200579336U CN201120057933U CN202016180U CN 202016180 U CN202016180 U CN 202016180U CN 2011200579336 U CN2011200579336 U CN 2011200579336U CN 201120057933 U CN201120057933 U CN 201120057933U CN 202016180 U CN202016180 U CN 202016180U
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- gas
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- nozzle body
- location division
- diameter
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Abstract
The utility model relates to a novel gas nozzle for gas-assisted molding. The gas nozzle comprises a barrel-shaped nozzle main body with a nozzle core installation channel, and is characterized in that: an opening at the front end of the barrel-shaped nozzle main body is conical; a nozzle core is arranged in the barrel-shaped nozzle main body and comprises a front-section pin part, a middle-section diameter-shrinking middle rod and a rear-section large-diameter positioning part; the front side of the large-diameter positioning part is conical; the diameter-shrinking middle rod and the large-diameter positioning part are provided with a ventilation channel; the middle part of the diameter-shrinking middle rod is provided with a radial gas spray hole connected with the ventilation channel; the rear side of the channel of the barrel-shaped nozzle main body is provided with a conical hole matched with the front side of the large-diameter positioning part of the nozzle core for positioning; the rear end of the large-diameter positioning part is provided with a jacking block; an external thread of the jacking block is matched with an internal thread of a threaded hole formed in the barrel-shaped nozzle main body; the jacking block is provided with a gas inlet channel; and the gas inlet channel and the ventilation channel are positioned on the same axis line. The device effectively solves the problem that nozzles used in closed gas-assisted injection molding (SIG) in the plastic molding industry in China are from foreign countries at present.
Description
Technical field
The utility model relates to a kind of new gas nozzle that is used for the gas assistant formation, belongs to design of plastic molding die and manufacturing field in the machine industry.
Background technology
Gas nozzle is mainly used in the air-auxiliary injection forming mould of large-scale precision working of plastics, and air-tightness requires very high, and the gas circuit gap requires accurately, belongs to the accurate crucial accessory of mould.Inject the position difference of die cavity according to gas, can be divided into two types: (1) adopts special injection nozzle, and gas is injected by the cast gate place, when the plastic melt injection reach a certain amount of after, stop to inject melt and convert injecting gas to; (2) adopt special-purpose gas nozzle (being commonly called as air tube), guiding gas is injected by the appropriate location of die cavity, and this position generally should be near cast gate, so that gas flow direction is consistent with the melt flows direction, but need apart from more than the cast gate 30mm, in case gas is poured in down a chimney by cast gate.The gas nozzle that uses both at home and abroad mainly is divided into spring reset type and clearance type at present.Though spring reset type valve is simple in structure, easy to manufacture, air gap easily stops up, spring easily lost efficacy, and can't satisfy molded large batch of production needs; The reliability of clearance type gas is higher, but also there are the following problems in the production application at home: (1) complex structure, imitated difficulty, can only repeat import; (2) gas circuit is easily stopped up, and is difficult to clean and maintenance; (3) import price costliness.
The gas nozzle of main flow is an external product in the industry, mainly exist complex structure, gas circuit easily to stop up, safeguard and clean deficiencies such as difficulty in the production application process at home, and unit price is up to 600 dollars/, increase die cost, reduced the homemade gas assistant formation mould competitiveness in market at home and abroad.Though domestic many producers are competitively imitated, the quality instability, serviceability and life-span are all far below external like product.
The monolateral air gap of gas nozzle is very little, belongs to the fine finishining category.The utility model is based on domestic existing processing and manufacturing condition, guaranteeing under the bubble-tight prerequisite of nozzle, two key technical problems in the gas nozzle development have been solved effectively, be the process rationality of nozzle arrangements and the assembling reasonability between each part of nozzle, optimize selection, and further worked out the rational heat treatment technological process, realized the production domesticization of this series products.
Summary of the invention
The purpose of this utility model is to provide a kind of new gas nozzle that is used for the gas assistant formation, and this device has effectively solved the present situation of the nozzle dependence external product that " closed air-auxiliary injection forming " (SIG) uses in the domestic plastic industry.
Of the present utility model being characterised in that: a kind of new gas nozzle that is used for the gas assistant formation, comprise and have the tubular nozzle body that nozzle core is installed passage, it is characterized in that: described tubular nozzle body front opening is tapered, in the described tubular nozzle body nozzle core is installed; Described nozzle core comprises the pin portion of leading portion, the location division, big footpath of the undergauge king-rod in stage casing and back segment, front side, location division, described big footpath is tapered, described undergauge king-rod and location division, big footpath offer airway, described undergauge king-rod middle part offers the radially fumarole that is connected with airway, described tubular nozzle body passage rear side is provided with the taper hole that cooperates the location with front side, location division, the big footpath of nozzle core, rear end, location division, described big footpath is provided with withstanding tight block, described withstanding tight block external screw thread matches with the internal thread of being located at tubular nozzle body screwed hole, described withstanding tight block offers inlet channel, and described inlet channel and airway are positioned on the same axial line.
Described tubular nozzle body periphery wall is provided with sealing ring.
The diameter of described undergauge king-rod, pin portion and location division, big footpath increases step by step.
Described nozzle core pin portion and tubular nozzle body passage are formed for gas is sprayed into the air gap of plastic products wall portion internal layer.
Advantage of the present utility model: based on the current situation of domestic gas assistant formation mould, break through the structure thinking of traditional valve, take into full account the reasonability of processing technology and assembly technology, composite requests such as implementation structure is simple, easy to manufacture, easy to maintenance, cost is low can replace external like product fully on using.
Description of drawings
Fig. 1 is the organigram of the utility model embodiment.
Fig. 2 is the organigram of nozzle core among the utility model embodiment.
Fig. 3 is the organigram of tubular nozzle body among the utility model embodiment.
Among the figure: 1 is nozzle core; 2 is the tubular nozzle body; 3 is airway; 4 are fumarole radially; 5 is withstanding tight block; 6 is sealing ring; 7 is air gap; 11 is pin portion; 12 is the undergauge king-rod; 13 is location division, big footpath; 21 is passage; 22 is tubular nozzle body front openings; 23 is taper hole; 24 is screwed hole; 51 is inlet channel.
The specific embodiment
For above-mentioned feature and advantage of the present utility model can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
With reference to legend, a kind of new gas nozzle that is used for the gas assistant formation, comprise having the tubular nozzle body 2 that nozzle core 1 is installed passage 21, it is characterized in that: described tubular nozzle body 2 front openings 22 are tapered, in the described tubular nozzle body 2 nozzle core 1 are installed; Described nozzle core 1 comprises the pin portion 11 of leading portion, the location division, big footpath 13 of the undergauge king-rod 12 in stage casing and back segment, 13 front sides, location division, described big footpath are tapered, described undergauge king-rod 12 and location division 13, big footpath offer airway 3, described undergauge king-rod 12 middle parts offer the radially fumarole 4 that is connected with airway 3, described tubular nozzle body 2 passages 21 rear sides are provided with the taper hole 23 that cooperates the location with 13 front sides, location division, nozzle core 1 big footpath, 13 rear ends, location division, described big footpath are provided with withstanding tight block 5, described withstanding tight block 5 external screw threads match with the internal thread of being located at tubular nozzle body 2 screwed holes 24 inwalls, described withstanding tight block 5 offers inlet channel 51, and described inlet channel 51 is positioned on the same axial line with airway 3.
Described tubular nozzle body 2 periphery walls are provided with sealing ring 6.
The diameter of described undergauge king-rod 12, pin portion 11 and location division 13, big footpath increases step by step.
Described nozzle core 1 pin portion 11 and tubular nozzle body 2 passages 21 are formed for gas is sprayed into the air gap 7 of plastic products wall portion internal layer.
In the utility model one preferred embodiment:
(1) adopt the cylinder cone match between described nozzle core and the nozzle body, compress with withstanding tight block, air-tightness is reliable, and this structure can obviously reduce the requirement to part tolerance, cuts down finished cost processing, assembling, use, easy to maintenance greatly.
(2) gap between described pin portion and the installation passage is an air gap delta: depend primarily on the viscosity of plastic melt, be embodied in the flash gap, must guarantee the flash gap permissible value [δ] of δ less than plastics.δ in the present embodiment=0.2[δ] be desirable air gap size calculation foundation, and the δ value can be adjusted flexibly according to different plastic melt characteristics.
(3) selecting for use of gas nozzle material: because gas nozzle required precision height, air gap are little, necessary strict guarantee nozzle is in use indeformable, little, the not corrosion of wearing and tearing, therefore, whole nozzle should adopt the stainless steel manufacturing, wherein nozzle core and nozzle body body select for use the S-136H steel to make, and have characteristics such as good-mirror polishability, the resistant to rust ability is splendid, heat treatment deformation is little.Nozzle is suitable with external like product service life, but its mixed economy cost only is 5% of a similar imported product.
Workflow of the present utility model and installation thereof: " closed air-auxiliary injection forming " is the advanced forming technique that domestic plastic industry was introduced the nineties in 20th century (SIG), wherein, gas nozzle is the critical component of all size gas assistant formation mould indispensability, during the injection moulding injection, gas (nitrogen commonly used) injects the plastic wall of mold cavity from air gap via air flue, owing to adopt reasonable air gap size, this air gap can only be inflated and can't flash; The valve installation site generally should be near cast gate, guaranteeing that gas flow direction is consistent with the melt flows direction, but must be poured in down a chimney by cast gate to prevent gas apart from more than the cast gate 30mm.When air flue is long, gas penetration and promote melt be full of the die cavity far-end comparatively the difficulty, this moment can set up gas nozzle in the far-end corresponding position.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (4)
1. a new gas nozzle that is used for the gas assistant formation comprises having the tubular nozzle body that nozzle core is installed passage, and it is characterized in that: described tubular nozzle body front opening is tapered, in the described tubular nozzle body nozzle core is installed; Described nozzle core comprises the pin portion of leading portion, the location division, big footpath of the undergauge king-rod in stage casing and back segment, front side, location division, described big footpath is tapered, described undergauge king-rod and location division, big footpath offer airway, described undergauge king-rod middle part offers the radially fumarole that is connected with airway, described tubular nozzle body passage rear side is provided with the taper hole that cooperates the location with front side, location division, the big footpath of nozzle core, rear end, location division, described big footpath is provided with withstanding tight block, described withstanding tight block external screw thread matches with the internal thread of being located at tubular nozzle body screwed hole, described withstanding tight block offers inlet channel, and described inlet channel and airway are positioned on the same axial line.
2. the new gas nozzle that is used for the gas assistant formation according to claim 1 is characterized in that: described tubular nozzle body periphery wall is provided with sealing ring.
3. the new gas nozzle that is used for the gas assistant formation according to claim 1 is characterized in that: the diameter of described undergauge king-rod, pin portion and location division, big footpath increases step by step.
4. the new gas nozzle that is used for the gas assistant formation according to claim 1 is characterized in that: described nozzle core pin portion and tubular nozzle body passage are formed for gas is sprayed into the air gap of plastic products wall portion internal layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200579336U CN202016180U (en) | 2011-03-08 | 2011-03-08 | Novel gas nozzle for gas-assisted molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200579336U CN202016180U (en) | 2011-03-08 | 2011-03-08 | Novel gas nozzle for gas-assisted molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202016180U true CN202016180U (en) | 2011-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200579336U Expired - Fee Related CN202016180U (en) | 2011-03-08 | 2011-03-08 | Novel gas nozzle for gas-assisted molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202016180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139528A (en) * | 2011-03-08 | 2011-08-03 | 福州冠锋模具技术有限公司 | Novel gas nozzle for gas-assisted molding |
| CN103737790A (en) * | 2013-12-26 | 2014-04-23 | 宁波舜宇模具有限公司 | Gas-assisted molding device |
-
2011
- 2011-03-08 CN CN2011200579336U patent/CN202016180U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139528A (en) * | 2011-03-08 | 2011-08-03 | 福州冠锋模具技术有限公司 | Novel gas nozzle for gas-assisted molding |
| CN102139528B (en) * | 2011-03-08 | 2013-03-13 | 福州冠锋模具技术有限公司 | Novel gas nozzle for gas-assisted molding |
| CN103737790A (en) * | 2013-12-26 | 2014-04-23 | 宁波舜宇模具有限公司 | Gas-assisted molding device |
| CN103737790B (en) * | 2013-12-26 | 2016-03-09 | 宁波舜宇模具有限公司 | A kind of foaming with gas device |
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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: 20111026 Termination date: 20130308 |