CN201579916U - Mixing gun head of polyurethane foam low-pressure mixing pouring machine - Google Patents
Mixing gun head of polyurethane foam low-pressure mixing pouring machine Download PDFInfo
- Publication number
- CN201579916U CN201579916U CN2009202718779U CN200920271877U CN201579916U CN 201579916 U CN201579916 U CN 201579916U CN 2009202718779 U CN2009202718779 U CN 2009202718779U CN 200920271877 U CN200920271877 U CN 200920271877U CN 201579916 U CN201579916 U CN 201579916U
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- Prior art keywords
- spool
- rifle body
- feeding passage
- gun body
- return flow
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- Expired - Fee Related
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Abstract
The utility model discloses a mixing gun head of a polyurethane foam low-pressure mixing pouring machine, which comprises a gun body, a gun mouth, a turning valve and a cylinder. A discharging opening is disposed on the bottom surface of the gun body, a first feeding passage and a second feeding passage are arranged on the left end surface and the right end surface of the gun body, two return flow passages are disposed on the top surface of the gun body, the return flow passages are respectively communicated with the discharging opening and crossed with the first feeding passage and the second feeding passage, a valve spool of the turning valve is respectively penetratingly mounted on the gun body, the cylinder is fixed on the gun body, and racks are respectively arranged on two lateral surfaces of the bottom end of a piston rod of the cylinder and meshed with gears at two spool extending ends. The mixing gun head leads the gun body and the valve spool to be made by 40 Cr steel, enables engaging surfaces of the gun body and the valve spool to be in ionic azotizing, enables cylindricity to be smaller than and equal to 0.005 mm, leads surface roughness value Ra to be smaller than and equal to 0.1 micrometer, leads an engaging clearance to be smaller than and equal to 0.01 mm, then leads the gun body and the valve spool to form tight contact seal and be driven by the racks and the gears to rotate when the cylinder acts and has high abrasion resistance and zero leakage, thereby greatly prolonging service life of the mixing gun head, and lowering maintenance cost.
Description
Technical field
The utility model relates to a kind of polyurethane foam low pressure and mixes casting machine, particularly relates to a kind of polyurethane foam low pressure and mixes casting machine hybrid gun head.
Background technology
Polyurethane low-pressure casting machine is used for mixing isocyanates rapidly with combined polyether two components, and reaction generates polyurethane foam.The hybrid gun head is a critical component in polyurethane low-pressure casting machine, existing hybrid gun head is the cone rotary valve, the molded polytetrafluoroethylarticle filler is adopted in its sealing, rely on cone rotary valve axial pressure, make it to compress the molded polytetrafluoroethylarticle filler and form sealing, but, at work, because the rifle head need gyrate, and there is the material liquid flowing channel groove at the rotary valve middle part, therefore cause the airtight and watertight padding serious wear life-span very short, (rotation) about 1000 times of working approximately promptly causes serious seepage and lost efficacy, and causes the maintenance that must stop production.Must manufacture the molded polytetrafluoroethylarticle filler again during maintenance, the higher relatively end processed complex of in addition boring of polytetrafluoroethylene (PTFE) price causes rifle head cost height, problems such as production efficiency is low, working service is complicated, maintenance cost height.
The utility model content
Technical problem to be solved in the utility model is to solve hybrid gun head airtight and watertight padding life-span weak point, the problem that production efficiency is low, working service is complicated, maintenance cost is high.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted provides a kind of polyurethane foam low pressure and mixes casting machine hybrid gun head, comprise rifle body, rifle mouth, rotary valve and cylinder, the bottom surface of described rifle body is provided with discharging opening, being respectively equipped with first, second pan feeding passage and the axis of the two on the end face of the left and right sides is positioned on the horizontal line, also be provided with two return flow lines that are used to connect the feed back jar on the end face of rifle body, described return flow line communicates with discharging opening respectively and intersects with first, second pan feeding passage; Described rifle mouth is screwed onto on the discharging opening on the rifle body bottom surface; Described rotary valve comprises two cylindric spools, the front end face of described rifle body is provided with two through holes, the intersection point of the axis of this through hole by pan feeding passage and return flow line axis and vertical with the plane at the two place, described spool is installed in above-mentioned two through holes respectively and the left and right sides end face seal of two ends and rifle body, the outer circumference surface that is positioned at pan feeding passage and return flow line intersection is provided with open slot, is fixed with a gear respectively on the preceding external part of spool; Described cylinder is fixed on the rifle body upper surface, and its piston rod stretches out downwards, is respectively equipped with tooth bar on the two sides, bottom of this piston rod, described tooth bar respectively with two spool external parts on gears engaged.
On the basis of such scheme, the material of described rifle body and spool is 40Cr, two through holes on the outer circumference surface of spool and the rifle body adopt ion nitriding technology to form nitration case, the case hardness of nitration case is HRc50, cylindricity≤the 0.005mm of the through hole on spool and the rifle body, surface roughness Ra value≤0.1 μ m, fit clearance≤0.01mm.
Angle between described return flow line and the pan feeding passage is 30～60 degree.
The bottom surface of described spool upper shed groove is curved.
The utility model, rifle body and spool adopt the 40Cr steel to make, adopt ion nitriding technology after the mating surface fine finishining of spool and rifle body, make case hardness reach HRc50, wearability improves greatly, adopt mechanical or manual grinding technics to make the cylindricity≤0.005mm of spool and through hole after the nitrogenize, surface roughness Ra value≤0.1 μ m, and fit clearance≤0.01mm, thereby make and form the tight sealing that contacts between the through hole on spool and the rifle body, again can be by the rack pinion driven rotary when cylinder moves, ne-leakage and highly abrasion-resistant, improve the service life of hybrid gun head greatly, reduced maintenance cost.
Description of drawings
Fig. 1 is the structural representation of the utility model hybrid gun head;
Fig. 2 is the right view of hybrid gun head among Fig. 1;
Stall cycles view when Fig. 3 uses for the utility model;
When using for the utility model, mixes Fig. 4 the material feeding view.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is made detailed explanation.
As shown in Figure 1 and Figure 2, the utility model comprises rifle body 2, rifle mouth 3, rotary valve and cylinder 1.
The bottom surface of rifle body 2 is provided with discharging opening 21, being respectively equipped with first, second pan feeding passage 22 and the axis of the two on the end face of the left and right sides is positioned on the horizontal line, also be provided with two return flow lines 23 that are used to connect the feed back jar on the end face of rifle body 2, described return flow line 23 communicates with discharging opening 21 respectively and intersects with first, second pan feeding passage 22, angle between return flow line 23 and the pan feeding passage 22 is 30～60 degree, preferred 40 degree;
Rotary valve comprises two cylindric spools 31, the front end face of rifle body 2 is provided with two through holes, the axis of this through hole is by first, the intersection point of the second pan feeding passage 22 and return flow line 23 axis and vertical with the plane at the two place, described spool 31 is installed in above-mentioned two through holes respectively and the left and right sides end face seal of two ends and rifle body 2, the outer circumference surface that is positioned at pan feeding passage 22 and return flow line 23 intersections is provided with open slot 32, the bottom surface of open slot 32 is curved, be fixed with a gear 33 on the preceding external part of spool 31 respectively, the material of rifle body 2 and spool 31 is 40Cr, two through holes on the outer circumference surface of spool 31 and the rifle body 2 adopt ion nitriding technology to form nitration case, the case hardness of nitration case is HRc50, cylindricity≤the 0.005mm of the through hole on spool and the rifle body, surface roughness Ra value≤0.1 μ m, fit clearance≤0.01mm.
The utility model mainly contains stall cycles and mixes two kinds of duties of material feeding when work.
Stall cycles view when Fig. 3 uses for the utility model; the rodless cavity of cylinder 1 enters compressed air; make descent of piston; so the tooth bar 12 of piston rod tail end drives two gears 33 on the spool simultaneously and inwardly rotates; make open slot 32 difference UNICOM pan feeding passage 22 and the return flow lines 23 separately on two spools, blocking-up discharge opening 21.At this moment, two groups of feed liquids (isocyanates and combined polyether) are delivered to the rifle body by charging pump separately from batch can, enter the return flow line by the open slot of pan feeding passage on spool, flow back to batch can through the feed back pipeline again and finish circulation.
When using for the utility model, mixes Fig. 4 the material feeding view, when system begins material feeding work, the upper end air valve of cylinder 1 is opened, rod chamber enters compressed air and makes piston stroking upward, so the tooth bar 12 of piston rod tail end drives two gears 33 on the spool simultaneously and outwards rotates, make open slot 32 difference UNICOM's pan feeding passage 22 and the discharging openings 21 on two spools, blocking-up return flow line 23.At this moment, two groups of feed liquids are delivered to the rifle body by charging pump separately from batch can, enter the return flow line by the open slot of pan feeding passage on spool, the peripheral passage blocking-up, two groups of feed liquids flow to discharge opening respectively, enter rifle mouth 3, phase impact and fully mix by the ejection of rifle mouth mouth in rifle mouth inwall reflection back flows to space to be foamed (mold cavity) reaction foaming formation hard polyurethane foams goods under pressure.
The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection domain of the present utility model.
Claims (4)
1. polyurethane foam low pressure is mixed casting machine hybrid gun head, it is characterized in that comprising:
The rifle body, the bottom surface is provided with discharging opening, being respectively equipped with first, second pan feeding passage and the axis of the two on the end face of the left and right sides is positioned on the horizontal line, also be provided with two return flow lines that are used to connect the feed back jar on the end face of rifle body, described return flow line communicates with discharging opening respectively and intersects with first, second pan feeding passage;
The rifle mouth is screwed onto on the discharging opening on the rifle body bottom surface;
Rotary valve, comprise two cylindric spools, the front end face of described rifle body is provided with two through holes, the intersection point of the axis of this through hole by pan feeding passage and return flow line axis and vertical with the plane at the two place, described spool is installed in above-mentioned two through holes respectively and the left and right sides end face seal of two ends and rifle body, the outer circumference surface that is positioned at pan feeding passage and return flow line intersection is provided with open slot, is fixed with a gear respectively on the preceding external part of spool;
Cylinder is fixed on the rifle body upper surface, and its piston rod stretches out downwards, is respectively equipped with tooth bar on the two sides, bottom of this piston rod, described tooth bar respectively with two spool external parts on gears engaged.
2. polyurethane foam low pressure as claimed in claim 1 is mixed casting machine hybrid gun head, the material that it is characterized in that described rifle body and spool is 40Cr, two through holes on the outer circumference surface of spool and the rifle body adopt ion nitriding technology to form nitration case, the case hardness of nitration case is HRc50, cylindricity≤the 0.005mm of the through hole on spool and the rifle body, surface roughness Ra value≤0.1 μ m, fit clearance≤0.01mm.
3. polyurethane foam low pressure as claimed in claim 1 or 2 is mixed casting machine hybrid gun head, it is characterized in that the angle between return flow line and the pan feeding passage is 30～60 degree.
4. polyurethane foam low pressure as claimed in claim 3 is mixed casting machine hybrid gun head, it is characterized in that the bottom surface of described spool upper shed groove is curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202718779U CN201579916U (en) | 2009-11-20 | 2009-11-20 | Mixing gun head of polyurethane foam low-pressure mixing pouring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202718779U CN201579916U (en) | 2009-11-20 | 2009-11-20 | Mixing gun head of polyurethane foam low-pressure mixing pouring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201579916U true CN201579916U (en) | 2010-09-15 |
Family
ID=42721909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202718779U Expired - Fee Related CN201579916U (en) | 2009-11-20 | 2009-11-20 | Mixing gun head of polyurethane foam low-pressure mixing pouring machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201579916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225612A (en) * | 2011-05-25 | 2011-10-26 | 桂林电子科技大学信息科技学院 | Temperature control device for plastic injection mould |
| CN103492638A (en) * | 2011-03-24 | 2014-01-01 | 拜耳知识产权有限责任公司 | Process for the production of ballast |
-
2009
- 2009-11-20 CN CN2009202718779U patent/CN201579916U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103492638A (en) * | 2011-03-24 | 2014-01-01 | 拜耳知识产权有限责任公司 | Process for the production of ballast |
| CN103492638B (en) * | 2011-03-24 | 2015-11-25 | 拜耳知识产权有限责任公司 | Prepare the method for ballast aggregate |
| CN102225612A (en) * | 2011-05-25 | 2011-10-26 | 桂林电子科技大学信息科技学院 | Temperature control device for plastic injection mould |
| CN102225612B (en) * | 2011-05-25 | 2013-07-03 | 桂林电子科技大学信息科技学院 | Temperature control device for plastic injection mould |
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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: 20100915 Termination date: 20111120 |