CN1593886A - Method and equipment for manufacturing artificial pearl - Google Patents
Method and equipment for manufacturing artificial pearl Download PDFInfo
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- CN1593886A CN1593886A CN 200410085356 CN200410085356A CN1593886A CN 1593886 A CN1593886 A CN 1593886A CN 200410085356 CN200410085356 CN 200410085356 CN 200410085356 A CN200410085356 A CN 200410085356A CN 1593886 A CN1593886 A CN 1593886A
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- counterdie
- olivet
- pearl
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Abstract
The invention relates to a method to make Venetian pearl and the correspondent device. The device consists of rack and corresponding upper model and under model. The upper model is fixed on the rack; the under model is fixed on the riser that is fixed on the rack too. At least in up surface of under model is concavity used for model cavity. Method to use this device includes following four steps: put colophony powder on top surface of the under model; rise the under model to link the upper model; the colophony is molded using only one step; down the under model for a distance to pipe out poisonous gas omitted when colophony melting; rise the under model and mole the colophony again; down the under model again to remove the model from the Venetian pearl. Because using the method can pipe out the poisonous gas, the Venetian pearl produced has little poisonous component which almost isn't dangerous to people.
Description
Technical field
The invention belongs to the manufacture method and the equipment of art ware, relate in particular to manufacture method and the equipment of a kind of olivet.
Background technology
Olivet is because it is inexpensive, be widely used on the ornaments such as jewellery, the main raw material(s) of olivet is various synthetic resin, adopt operations such as casting, grinding, dip-coating produced, the basic material of olivet can utilize various synthetic resin, but the most frequently used is thermoplastic urea resin, this resin is because but its hardness and thermoplasticity are better, therefore the pearl moulding is easy, adhibit quality is very weak and can not be bonded in the mold die cavity in the process of setting of casting, so the utilization rate of urea resin is very high.The manufacturing equipment of present olivet mainly comprises frame and is fixed on counterdie on the frame, corresponding patrix is fixed on the lowering or hoisting gear, lowering or hoisting gear is installed on the frame, and upper die and lower die are provided with die cavity as required, and patrix and/or counterdie have heater and keep certain temperature.Adopt the manufacture method of this equipment to be: at first on counterdie, to place an amount of toner, utilize lowering or hoisting gear to make patrix dock then pearl moulding in die cavity then with certain speed decline and with counterdie.If process porose pearl, the type pin then is set in the die cavity of patrix or counterdie, the pearl that casts out so just has perforation.
The method of above-mentioned manufacturing olivet has certain defective, mainly contain following some:
1) resin, especially urea resin, can produce toxic gas when fusing, in the pearl forming process, die cavity seals all the time, because the effect of toxic gas, can form pore, crackle on the pearl of moulding, pearl intensity is reduced, and toxic gas can be adsorbed on pearl inside, the finished product pearl can be leaked this toxic gas for a long time, and people wear the jewellery that have this pearl and cause the fash or the disease of itching easily.
2) during the pearl of production tape punching, owing to be to adopt the method and apparatus of fixed pin in the die cavity to form, not only mould is made complicatedly, and the pearl after the moulding is difficult to take out, and causes productivity ratio and product percent of pass low.
3) upper and lower mould,, then docks the air pressure that causes and causes toner to splash easily if the speed of upper and lower mould butt joint is too fast relatively near also butt joint with certain speed, influences the filling of powder in die cavity, thereby influences the quality of moulding pearl; Butt joint speed is slow excessively, can cause production efficiency too low again.
Summary of the invention
The manufacture method and the equipment that the purpose of this invention is to provide a kind of olivet, the pearl toxic gas content that utilizes this method and apparatus to make is few, the efficient height of production.
For achieving the above object, manufacture method of the present invention adopts and comprises that the mould of upper die and lower die carries out die casting, and the upper die and lower die butt joint forms and can mainly comprise following four steps for the die cavity of pearl moulding:
(a) the counterdie upper surface is placed toner, rises then and docks with patrix, and toner is one-shot forming in die cavity;
(b) the counterdie segment distance that descends, the toxic gas that forms when discharging the toner fusing;
(c) counterdie rises once more, the post forming in die cavity of one-time formed toner;
(d) counterdie descends once more, the olivet demoulding of moulding.
If produce the pearl have perforation, then in above-mentioned steps (a), counterdie is with after patrix docks, and the type pin makes one-time formed pearl have perforation from counterdie insertion die cavity; For the pearl that makes tape punching is taken out easily, in above-mentioned steps (b), (c), the type pin remains in the die cavity of counterdie; In above-mentioned steps (d), the type pin is extracted out in the die cavity of counterdie.
Avoid toner to splash simultaneously and powder fully filling in die cavity in order to enhance productivity, in above-mentioned steps (a), it is fast rise that counterdie begins, and rises relatively slowly during near patrix; As preferably, zooming speed is 10-30m/s, and the speed of above-mentioned slow rising is: 5-10m/s.
In order to get rid of toxic gas effectively, in above-mentioned steps (b), the distance that counterdie descends is 5-30cm.
Adopt the equipment of said method to comprise frame and the upper die and lower die that match, patrix is fixed on the frame, and counterdie is arranged on the lowering or hoisting gear, and lowering or hoisting gear is arranged on the frame, and the counterdie upper surface is provided with the pit that forms die cavity at least.
Above-mentioned lowering or hoisting gear comprises cylinder and the corresponding piston that is fixed on the frame, and the free end of piston is connected with counterdie; Needle plate and type pin are set between counterdie and piston free end, and its medium-sized pin one end is fixed on the needle plate, and the other end inserts the counterdie bottom of corresponding die cavity, and the formation of the pin hole bottom counterdie interference fit, and pin hole is communicated with die cavity; The limiting plate that the restriction counterdie descends is set on the frame.
On the above-mentioned frame lifting guide pillar can also be set, the piston free end is connected with needle plate by the lifting guide plate, and the corner of lifting guide plate has pilot hole, forms with the lifting guide pillar to be slidingly matched; The limiting plate arrangement for adjusting height also is set on the frame, it comprises the adjusting bolt that is arranged on the cylinder upper surface, the fixing limit stick and the lifting guide plate upper surface stationary sleeve of lower surface of limiting plate, the through hole that runs through in the formation of sleeve position on the lifting guide plate, limit stick passes sleeve and lifting guide plate, and the bottom withstands on the end face of regulating bolt; Lifting guide pillar lower surface fixed support rod, the support stick bottom withstands on the cylinder upper surface.
Adopt method and apparatus of the present invention to make pearl, the segment distance because counterdie descends after the toner one-shot forming, fully do not solidify as yet owing to toner this moment, most of toxic gas wherein can be discharged, counterdie rises once more and makes the toner post forming then, solidify the back fully and form pearl, so the toxic gas that the pearl of moulding contains seldom, can not impact human body substantially; Because counterdie is when rising, fast rise before this slowly rose near patrix the time, and therefore existing higher production efficiency has avoided toner to splash again and powder is filled insufficient quality decline that causes in die cavity; When production has the pearl of perforation, because when counterdie drops to a certain degree, limited plate blocks, no longer continue to descend, and needle plate and type pin can continue to descend with piston, and this template pin just can be extracted out from pearl, compared with the prior art, be to utilize mechanical force that the type pin is extracted out from pearl, the pearl demoulding is easy.
Description of drawings
Fig. 1 is pearl manufacturing equipment embodiment 1 an overall structure schematic diagram of the present invention;
Fig. 2 is the view that pearl manufacturing equipment embodiment 1 counterdie upper surface of the present invention has been placed toner;
Fig. 3 is the view behind pearl manufacturing equipment embodiment 1 counterdie fast rise one segment distance of the present invention;
Fig. 4 is that pearl manufacturing equipment embodiment of the present invention 1 is in one-time formed view;
Fig. 5 is the view that toxic gas is discharged in pearl manufacturing equipment embodiment 1 counterdie decline of the present invention;
Fig. 6 is the view of pearl manufacturing equipment embodiment of the present invention 1 post forming;
Fig. 7 is the view after pearl manufacturing equipment embodiment 1 counterdie of the present invention resets;
Fig. 8 is pearl manufacturing equipment embodiment 2 overall structure schematic diagrames of the present invention;
Fig. 9 is the view that pearl manufacturing equipment embodiment 2 counterdie upper surfaces of the present invention have been placed toner;
Figure 10 is the view behind pearl manufacturing equipment embodiment 2 counterdie fast rise one segment distance of the present invention;
Figure 11 is that pearl manufacturing equipment embodiment of the present invention 2 is in one-time formed view;
Figure 12 is the view that toxic gas is discharged in pearl manufacturing equipment embodiment 2 counterdies decline of the present invention;
Figure 13 is the view of pearl manufacturing equipment embodiment of the present invention 2 post formings;
Figure 14 is the view that pearl manufacturing equipment embodiment 2 pearls of the present invention begin the demoulding;
Figure 15 is the view that the pearl manufacturing equipment embodiment 2 pearl demouldings of the present invention finish.
The specific embodiment
Embodiment 1:
Pearl manufacturing equipment structure of the present invention as shown in Figure 1, it comprises frame 10, the top of frame 10 is patrix m1 fixedly, patrix m1 lower surface has upper cavity 100, the bottom is provided with cylinder 300 and piston 310 as lowering or hoisting gear, the top of piston 310 connects needle plate 200, fixed pin 210 on the needle plate 200, the pit formation lower mode cavity 100 of the upper surface of counterdie m2 ', lower mode cavity 100 ' form whole die cavity jointly with upper cavity 100, lower mode cavity 100 ' and counterdie m2 lower surface between pin hole 110 is set, the top of type pin 210 and pin hole 110 form interference fit, restriction counterdie m2 continuation also is set with the limiting plate 20 that needle plate 200 descends on the frame 10, has big holes 21 in the middle of the limiting plate 20.
During actual production, place toner C at the upper surface of counterdie m2 earlier, as shown in Figure 2, this moment, inserted in the pin hole of counterdie m2 and its formation interference fit type pin 210 upper end, and head can not enter lower mode cavity 100 ' in, the base of counterdie m2 is supported on the limiting plate 20, and piston 310 and needle plate 200 are in extreme lower position.
Manipulating cylinder 300 makes piston 310 fast rise one segment distance h1 then, and as shown in Figure 3, the toner C on this moment counterdie m2 is near the lower surface of patrix m1; Piston 310 is slowly risen, because counterdie m2 has heater and counterdie m2 maintains enough temperature, therefore when counterdie m2 upper surface docks with patrix m1 lower surface, toner C begins fusing and is full of die cavity 100,100 ', when piston 310 and needle plate 200 continue to rise, because counterdie M2 can't continue to rise, type pin 210 on the needle plate 200 progress into lower mode cavity 100 ' in, until run through whole die cavity 100 ', 100 form core, so far, piston 310 stops to rise, and toner C one-shot forming is finished, and have perforation on the pearl, as shown in Figure 4.
After one-shot forming is finished, piston 310, needle plate 200, counterdie m2, and the one-time formed toner C a bit of distance h 3 that descends, because the resin of this moment does not also solidify fully, so its toxic gas of being produced of fusing can come out, and is represented as Fig. 5.
Afterwards, piston 310 drive needle plates 200, counterdie m2, and one-time formed toner C rise once more, when counterdie m2 upper surface docks with patrix m1 lower surface, stop toner C post forming in lower mode cavity, solidify the back fully and form pearl, as shown in Figure 6.Because most toxic gas is discharged, so the pearl of moulding seldom has bubble, crackle etc., the situation that does not in use also almost have toxic gas to leak.
After post forming is finished, piston 310 drive needle plates 200, counterdie m2, and the pearl of moulding descend once more, when counterdie m2 falls back to initial position, limited plate 20 blocks, can't continue to descend, needle plate 200 then can continue decline in hole 21 under the drive of piston 310, consequently type pin 210 relative counterdie m2 descend, from the perforation 110 of the pearl of moulding, extract out, still get back to initial position, be that head is arranged in pin hole 110 and is interference fit, piston 310 is all got back to initial position with needle plate 200, as shown in Figure 7.
With the pearl demoulding on the counterdie m2, whole manufacturing process is finished at last.Can on counterdie, place toner C once more, the next circulation of beginning.
For the operational factor of utilizing said process, can design according to actual conditions, select suitable time and stroke.In general, the zooming speed of counterdie is 10-30m/s, and the speed of above-mentioned slow rising is: 5-10m/s.Discharge in the process of toxic gas, the distance h 3 that counterdie descends is 5-30cm.
As for heater being set on patrix and/or counterdie and making mould keep certain temperature, be prior art, do not repeat them here; Pearl is spherical in the foregoing description, and upper and lower mould respectively has some corresponding hemispherical die cavitys; During other situation, the size of the pearl of Zhi Zaoing, shape are come the flexible design die cavity as required, but generally at least the counterdie upper surface die cavity is set, the patrix lower surface then is provided with or is not provided with die cavity as required; The foregoing description is to be example with the pearl of making tape punching, describe, pearl for atresia, the Apparatus and method for of its manufacturing is simple relatively, only above-mentioned needle plate need be changed into onesize no type pin flat board, change counterdie into free of pinholes get final product, such equipment promptly can be made drilled pearl, also can make the atresia pearl; Certainly, have the upper and lower mould of multi-form die cavity by replacing, equipment of the present invention can produce pearl miscellaneous.
Embodiment 2:
As shown in Figure 8, it comprises frame 10, and frame 10 comprises base 11 and upper bracket 12, and they are fixedly connected by four lifting guide pillars 13; The top of upper bracket 12 is patrix 500 fixedly, and patrix 500 tops are provided with patrix heating plate 510, and the lower surface of patrix 500 has some upper cavities 520; Base 11 middle positions are provided with cylinder 100 and piston 110 as lowering or hoisting gear, cylinder 100 end faces have two screwed holes, regulating bolt 120 is arranged in the screwed hole, the fixedly connected lifting guide plate 200 in the top of piston 110, four angles of lifting guide plate 200 have pilot hole respectively, form with above-mentioned lifting guide pillar 13 to be slidingly matched, and lifting guide plate 200 upper surfaces are counterdie heating plate 220 fixedly, counterdie heating plate 220 upper surfaces are needle plate 230 fixedly, and needle plate 230 upper surfaces are fixed some type pins 240; Some pits of the upper surface of counterdie 400 form lower mode cavity 420, and lower mode cavity 420 can form whole die cavity jointly with upper cavity 520, between each lower mode cavity 420 and counterdie 400 lower surfaces pin hole 410 is set, and the top of type pin 240 and pin hole 410 form interference fit; Annular stop plate 300 also is set on the frame 10, have big hole 310 in the middle of the limiting plate 300, limiting plate 300 is enclosed within needle plate 230 peripheries, hole 310 greater than needle plate 230 less than counterdie 400, lifting guide plate 200 upper surface fixed muffles 330 form the through hole that runs through in sleeve 330 positions on the lifting guide plate 200, and the lower surface of limiting plate 300 is fixed two limit sticks 320, limit stick 320 passes sleeve 330 and lifting guide plate 200, and the bottom withstands on the end face of regulating bolt 120; The lower surface fixed support rod 210 of lifting guide plate 200, the lower end of support stick 210 withstands on the upper surface of cylinder 100.
During actual production, original state as shown in Figure 9, the lower end of support stick 210 withstands on the upper surface of cylinder 100, limit stick 320 bottoms withstand on the upper surface of regulating bolt 120, lifting guide plate 200 and limiting plate 300 all are in extreme lower position, this moment, inserted in the pin hole 410 of counterdie 400 and its formation interference fit type pin 240 upper end, and head can not enter in the lower mode cavity 420, and place toner C at the upper surface of counterdie 400 this moment.
Manipulating cylinder 100 makes piston 110 fast rise one segment distance h1 then, in uphill process, because needle plate 300, counterdie heating plate 220, lifting guide plate 200 all is fixed together, and the type pin on the needle plate 300 240 forms interference fit with the pin hole 410 of counterdie 400, therefore they all rise with piston 110 immediately, when sleeve 330 tops of lifting guide plate 200 upper surfaces withstand on the lower surface of limiting plate 300, limiting plate 300 also rises thereupon, the state that fast rise finishes as shown in figure 10, the toner C on this moment counterdie 400 is near the lower surface of patrix 500.
Piston 110 is slowly risen, because counterdie 400 has heating plate 220, therefore counterdie 400 maintains certain temperature, when counterdie 400 upper surfaces dock with patrix 500 lower surfaces, but toner C is fused into the state of die casting just and is full of lower mode cavity 420, when piston 110 and needle plate 230 continue to rise, because counterdie 400 can't continue to rise, type pin 240 on the needle plate 230 progresses in the lower mode cavity 420, forms core until running through whole die cavity, so far, piston 110 stops to rise, toner C one-shot forming is finished, and has perforation on the pearl, as shown in figure 11.
After one-shot forming is finished, piston 110 drives lifting guide plates 200, counterdie heating plate 220, needle plate 230, counterdie 400, and the one-time formed toner C a bit of distance h 3 that descends, limiting plate 300 is owing to withstood by the sleeve on the lifting guide plate 200 330, therefore also descend together, because the resin of this moment does not also solidify fully, therefore the toxic gas that produced of its fusing can come out, as shown in figure 12.
Afterwards, the toner C that piston 110 promotes after lifting guide plate 200, limiting plate 300 counterdie heating plates 220, needle plate 230, needle plate 200, counterdie 400 and the one-shot forming rises once more, when docking with patrix 500 lower surfaces, counterdie 400 upper surfaces stop, toner C post forming in lower mode cavity, solidify fully and form pearl, as shown in figure 13.Because most toxic gas is discharged, so the pearl of moulding seldom has bubble, crackle etc., the situation that does not in use also almost have toxic gas to leak.
After post forming is finished, piston 110 drives lifting guide plate 200, counterdie heating plate 220, needle plate 230, counterdie 400, reaches the pearl decline of moulding, limiting plate 300 is owing to withstood by the sleeve on the lifting guide plate 200 330, therefore also descend together, when the lower end of limit stick 320 withstood on the upper surface of regulating bolt 120, limiting plate 300 stopped, because the size of counterdie 400 is greater than the hole 310 of limiting plate 300, therefore counterdie 400 limited plates block and also can't continue to descend, as shown in figure 14; And lifting guide plate 200, counterdie heating plate 220, needle plate 230 can continue to descend with piston 110, this template pin 240 is just extracted out from the perforation of the pearl of moulding, the type pin has been realized the demoulding, when the extraction head is got back in the counterdie pin hole 410 from pearl fully to type pin 240, support stick 210 lower ends also withstand on the upper surface of cylinder 100 just, piston and lifting guide plate 200, counterdie heating plate 220, needle plate 230 all stop, and get back to original state, as shown in figure 15.
At last the pearl on the counterdie 400 is taken off, whole manufacturing process is finished.Can on counterdie 400, place toner C once more, the next circulation of beginning.
Clearly, the degree that type pin 240 is extracted out depends on the position that limiting plate 300 stops, and this point can realize by screwing adjusting bolt 120, especially when replacing with counterdie with the pearl of production difformity, size, can be by regulate regulating the degree that bolt come the control type pin to extract out.
Compare with embodiment 1, present embodiment is because the adjustable height of limiting plate, therefore can better debug the extraction degree with the control type pin, makes entire equipment more flexible; Owing to be provided with the lifting guide plate, when making the pearl moulding butt joint of upper and lower mould more steady, improved the reliability of equipment.
Adopt method and apparatus of the present invention to make pearl, the segment distance because counterdie descends after the toner one-shot forming, fully do not solidify as yet owing to toner this moment, most of toxic gas wherein can be discharged, counterdie rises once more and makes the toner post forming then, solidify the back fully and form pearl, so the toxic gas that the pearl of moulding contains seldom, can not impact human body substantially; Because counterdie is when rising, fast rise before this slowly rose near patrix the time, and therefore existing higher production efficiency has avoided toner to splash again and powder is filled insufficient quality decline that causes in die cavity; When production has the pearl of perforation, because when counterdie drops to a certain degree, limited plate blocks, no longer continue to descend, and needle plate and type pin can continue to descend with piston, and this template pin just can be extracted out from pearl, compared with the prior art, be to utilize mechanical force that the type pin is extracted out from pearl automatically, the pearl demoulding is easy.
Claims (13)
1. the manufacture method of an olivet, its adopts and comprises that the mould of upper die and lower die carries out die casting, and the upper die and lower die butt joint forms and can it is characterized in that it comprises for the die cavity of pearl moulding:
(a) the counterdie upper surface is placed toner, rises then and docks with patrix, and toner is one-shot forming in die cavity;
(b) the counterdie segment distance that descends, the toxic gas that forms when discharging the toner fusing;
(c) counterdie rises once more, the post forming in die cavity of one-time formed toner;
(d) counterdie descends once more, the olivet demoulding of moulding.
2. the manufacture method of olivet according to claim 1 is characterized in that in above-mentioned steps (a), and counterdie is with after patrix docks, and the type pin inserts the die cavity from counterdie, makes one-time formed olivet have perforation.
3. the manufacture method of olivet according to claim 2 is characterized in that in above-mentioned steps (b), (c), the type pin remains in the die cavity of counterdie; In above-mentioned steps (d), the type pin is extracted out from the die cavity of counterdie.
4. the manufacture method of olivet according to claim 1 is characterized in that in above-mentioned steps (a), it is fast rise that counterdie begins, and rises relatively slowly during near patrix.
5. the manufacture method of olivet according to claim 4 is characterized in that above-mentioned zooming speed is 10-30m/s, and the speed of above-mentioned slow rising is: 5-10m/s.
6. the manufacture method of olivet according to claim 1 is characterized in that the counterdie dropping distance is 5-30cm in above-mentioned steps (b).
7. olivet manufacturing equipment that uses aforesaid right to require described method, it comprises frame and the upper die and lower die that are complementary, it is characterized in that patrix is fixed on the frame, counterdie is arranged on the lowering or hoisting gear, lowering or hoisting gear is arranged on the frame, and the counterdie upper surface is provided with the pit that forms die cavity at least.
8. olivet manufacturing equipment according to claim 7 is characterized in that described lowering or hoisting gear comprises cylinder and the corresponding piston that is fixed on the frame, and the free end of piston is connected with counterdie.
9. olivet manufacturing equipment according to claim 8, it is characterized in that between counterdie and piston free end, being provided with needle plate and type pin, its medium-sized pin one end is fixed on the needle plate, the other end inserts the counterdie bottom of corresponding die cavity, and form interference fit with the pin hole of counterdie bottom, pin hole is communicated with die cavity.
10. olivet manufacturing equipment according to claim 9 is characterized in that being provided with on the frame limiting plate that the restriction counterdie descends.
11. olivet manufacturing equipment according to claim 10 is characterized in that being provided with on the frame lifting guide pillar, the piston free end is connected with needle plate by the lifting guide plate, and the corner of lifting guide plate has pilot hole, forms with the lifting guide pillar to be slidingly matched.
12. olivet manufacturing equipment according to claim 11, it is characterized in that also being provided with on the frame limiting plate arrangement for adjusting height, it comprises the adjusting bolt that is arranged on the cylinder upper surface, the fixing limit stick and the lifting guide plate upper surface stationary sleeve of lower surface of limiting plate, the through hole that runs through in the formation of sleeve position on the lifting guide plate, limit stick passes sleeve and lifting guide plate, and the bottom withstands on the end face of regulating bolt.
13. olivet manufacturing equipment according to claim 12 is characterized in that lifting guide pillar lower surface fixed support rod, the support stick bottom withstands on the cylinder upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100853566A CN100430199C (en) | 2004-06-03 | 2004-10-13 | Method and equipment for manufacturing artificial pearl |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410024247.3 | 2004-06-03 | ||
| CN200410024247 | 2004-06-03 | ||
| CNB2004100853566A CN100430199C (en) | 2004-06-03 | 2004-10-13 | Method and equipment for manufacturing artificial pearl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1593886A true CN1593886A (en) | 2005-03-16 |
| CN100430199C CN100430199C (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100853566A Expired - Fee Related CN100430199C (en) | 2004-06-03 | 2004-10-13 | Method and equipment for manufacturing artificial pearl |
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| CN (1) | CN100430199C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110884069A (en) * | 2019-12-05 | 2020-03-17 | 武汉市银宝山新模塑科技有限公司 | Oil cylinder core-pulling structure and method for SMC (sheet molding compound) mould pressing |
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2004
- 2004-10-13 CN CNB2004100853566A patent/CN100430199C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110884069A (en) * | 2019-12-05 | 2020-03-17 | 武汉市银宝山新模塑科技有限公司 | Oil cylinder core-pulling structure and method for SMC (sheet molding compound) mould pressing |
| CN110884069B (en) * | 2019-12-05 | 2022-05-17 | 武汉市银宝山新模塑科技有限公司 | Oil cylinder core-pulling structure and method for SMC mould pressing |
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| CN100430199C (en) | 2008-11-05 |
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Granted publication date: 20081105 Termination date: 20161013 |