CN1224361A - Method and system for mfg. elastometic articles - Google Patents
Method and system for mfg. elastometic articles Download PDFInfo
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- CN1224361A CN1224361A CN 97196157 CN97196157A CN1224361A CN 1224361 A CN1224361 A CN 1224361A CN 97196157 CN97196157 CN 97196157 CN 97196157 A CN97196157 A CN 97196157A CN 1224361 A CN1224361 A CN 1224361A
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Abstract
A method of manufacturing a device having a first elastomeric portion (200) and a second elastomeric portion (204), the second elastomeric portion being formed into a nonplanar shape, i.e., a vaginal discharge collection device (214) that is formed of an elastomeric rim (200) and a flexible film reservoir (202), including the steps of loading a rim (200) into a carrier plate (16), laying film (204) over the rim, heat sealing the film to the rim, preheating the rim and film, drawing the film into a chamber by creating a vacuum to form the collector, and removing the collector from the carrier plate.
Description
Background of invention
The present invention relates generally to the elastomeric method and system of a kind of manufacturing, more specifically relate to the method and system that a kind of manufacturing has the utensil of a plurality of elastic parts, a part of this utensil is relatively thin non-flat portion, and remainder is relative thicker part, all U.S. Patent No.s in this way 5, the sort of being used to described in 295,984 collected the utensil that vaginas such as vaginal discharge and/or medicament are given application matter, and the whole announcement of this patent is quoted at this for reference.
For example, this system can be used for producing a kind of so concrete product, and it can be an elastic band than thickness portion relatively, and its relatively thin part can be a nonplanar thin elasticity storage tank.In the manufacture method of prior art, this utensil can be injection molded into one-piece type.Yet, for some utensil, because the storage tank member must be extremely thin film, thereby also improper with injection moulding.In order to reach such thickness, storage tank can be used the elastic material sheet vacuum forming.For storage tank is the utensil of extremely thin film, and its common production method only is that a preformed storage tank is connected in a ring that is shaped separately.But, preformed storage tank intractable, because extremely thin elastic film is perishable, itself can adhere to, and is difficult to keep its shape after vacuum forming.
Brief summary of the invention
In one aspect of the invention, a plurality of first elastic parts are heat-sealed in one to have second elastic part of flat shape and forms intermediate member, then these intermediate members are placed a vacuum mold, planar second elastic part forms thin non-flat portion in mould.
In an application of the present invention, a flexible sheet is heat-sealed in one group of elastic band and forms tympanum, then these tympanums are placed a vacuum mold, membrane portions becomes storage tank by the tympanum vacuum forming in mould.
One object of the present invention is to provide a kind of manufacturing to have the method for utensil that an elastic band and is connected in the fexible film storage tank of this ring.
Another object of the present invention is to provide a kind of method of making vagina with utensil.
Another object of the present invention is to provide a kind of the manufacturing can be in the method for intravaginal to the utensil of application matter or other medicament.
Another object of the present invention is to provide a kind of method of making the vaginal discharge catcher.
Another object of the present invention is to provide a kind of batch process to have the method for utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring.
Another object of the present invention is to provide a kind of manufacturing to have the method for utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring, wherein before carrying out vacuum forming, earlier a diaphragm is heat-sealed in this ring.
Another object of the present invention is to provide a kind of manufacturing to have the method for utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring, this method can monitor whether form suitable vacuum in the vacuum forming operation, and with this information defective utensil and qualified utensil is separated.
Another object of the present invention is to provide a kind of ring that will make by moulding technology before heat-sealing and vacuum mo(u)lding technology, to be oriented such that the location of each molded ring is identical.
Another object of the present invention is to provide a kind of tests to determine whether to exist in the finished product utensil method of the defect of manufacturing or material aspect automatically to utensil.
Other purpose of the present invention and advantage will become clear by following the detailed description and the accompanying drawings explanation to preferred embodiment of the present invention.
The accompanying drawing summary
Fig. 1 is that manufacturing of the present invention has the vertical view of a preferred embodiment of system of utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring.
Fig. 2 is that manufacturing of the present invention has the side view of second preferred embodiment of system of utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring.
Fig. 3 is the axonometric chart of the part of employed support plate in Fig. 1 system.
Fig. 4 is the cutaway view that IV-the IV line is cut open along Fig. 3.
Fig. 5 is the axonometric chart of the material loading station of Fig. 1 system.
Fig. 6 is the axonometric chart of the heat-sealing station of Fig. 1 system.
Fig. 7 is the amplification stereogram that Fig. 4 seals station.
Fig. 8 is the cutaway view of cutting open along VIII-VIII of Fig. 7.
Fig. 9 is similar to Fig. 8, diaphragm is engaged in the cutaway view of the heat seal tool of ring.
Figure 10 is the side view cutaway drawing that X-X line cut of the preheating station of Fig. 1 system along Fig. 1.
Figure 11 is the side view cutaway drawing that XI-XI line cut of the vacuum forming station of Fig. 1 system along Fig. 1.
Figure 12 is the cutaway view of vacuum die cavity of the vacuum forming station of Figure 11.
Figure 13 is the side view of the blanking station of Fig. 1 system.
Figure 14 is the axonometric chart of a utensil being produced of Fig. 1 system.
Figure 15 is an axonometric chart of determining a preferable system of the orientation of ring before inserting support plate.
Figure 16 is the side view of Figure 15 system.
Figure 17 is the vertical view of Figure 15 system.
Figure 18 determines the circularity of ring before inserting support plate and the vertical view of a preferable system of flatness.
Figure 19 is the sectional view that the finished product utensil is carried out an equipment of defect test.
Figure 20 is that manufacturing of the present invention has the vertical view of second embodiment of system of utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring.
Figure 21 is that manufacturing of the present invention has the vertical view of another embodiment of system of utensil that an elastic band and is connected in the vacuum forming thin film storage tank of this ring.
The detailed description of preferred embodiment
Describe below to make and have the method for utensil 214 (seeing Figure 14) that an elastic band 200 and is connected in the vacuum forming thin film storage tank 202 of ring 200.Embodiment shown in the accompanying drawing is particularly useful for menstrual fluid and collects.For the application scenario of other kind, may need according to required application scenario, give as material and apply, use the vacuum forming equipment of suitable material and suitable shape that utensil is made suitable shape, such as U.S. Patent No. 5,295,984.
Referring to Fig. 1 and Fig. 2, there is shown a preferred embodiment of manufacturing system of the present invention.The manufacturing system of Fig. 1 comprises five stations: material loading station 20, heat-sealing station 40, preheating station 60, vacuum forming station 80 and blanking station 100.This manufacturing system is by two programmable logic controller (PLC)s (PLC), 10 controls, all actions of their sequential organization equipment.These behaviors can be by controller operation or driving automatically at the difference place.
A support plate 16 that has all utensils is by each station.Fig. 1 represents that all stations are arranged in the ring-type transmission lines that is connected by conveyer 12, and this conveyer has a pair of chain component 14, their loading plates 16.Fig. 2 represents all station settings in line, and wherein a driving system 312 takes support plate 16 to each station: heat-sealing station 340, preheating station 360, vacuum forming station 380 and blanking station 400.The two ends of Fig. 2 cathetus are provided with elevator 320, and they can raise and reduce support plate 16.Elevator 320 can make some station fold on other station, thereby saves the ground space in the factory.The vertical view of Figure 20 presentation graphs 2 stations.
Figure 21 represents the vertical view of another embodiment of the present invention, wherein, before support plate 16 runs to each station, by once will expecting on the ring 200 on two isolating support plates 16 ring 200 is supplied with support plates 16.Ring 200 is introduced into the pre-loader 522 of a flute profile earlier, is sent to a pair of centrifugal loader 524 then.Centrifugal loader 524 enters pair of channels 526 with ring 200 with flat locate mode, so that insert support plate 16.This assembly can have circularity, flatness and a localized utensil (not shown) of checking ring 200 before ring is inserted support plate 16.
Fig. 1 represents support plate 16 of the present invention for square, and size is made and can be held a plurality of utensils.In a preferred embodiment, support plate 16 is about 36 * 36 inches, thick about 0.3125 inch.In plate, form 100 holes 18 of 10 row * 10 row.The diameter in hole 18 is designed to produce frictional fit between ring 200 and the hole 18 when ring 200 patchholes 18.As shown in Figure 3 and Figure 4, hole 18 extends through whole support plate 16.Support plate 16 has around each hole 18 circular ridge 19.Limit a groove 15 between the circular ridge 19.The size of depth of groove and convex ridge height is made: in the heat-sealing operation, a lower bolster 58 can embed in the groove, and convex ridge 19 can play supporting role to ring 200.
Referring to Figure 15.The figure shows a preferred embodiment, wherein this assembly comprises a module 240, this module check ring 200, and they are turned to become to contain cast gate residue 218 1 sides and fall up.The surperficial within it upward molding of ring 200 has a series of projections 222.These projections 222 are in the central authorities of inner surface, but are arranged in the one side near ring 200 inboards prejudicially.In an illustrated embodiment, projection 222 is arranged to relative with cast gate residue 218.The size of projection 222 and interval are made enough obvious, thereby can be detected by an image detection system, and this system is discussed below.In an illustrated embodiment, projection 222 centers on the inner peripheral surface of ring 200 and separates each other, and they are about 0.25 inch, and are wide about 0.0625 inch, high about 0.005 inch to 0.010 inch.Ring 200 can have the projection 222 that realizes the needed quantity of valid function.Best, ring 200 have about 10 along the inner peripheral surface of ring 200 and the projection 222 that is provided with.
Projection 222 can play two different effects at least.Projection 222 is convenient to the die cavity of molded ring 200 from molded operation is extracted into core side, thereby strengthens effective circulation of the molded operation of ring 200.Eccentric projection 222 also can be discerned by video camera 241, one side make the another side that is different from of ring 200.Ring 200 has only a limit to have cast gate residue 218, will be oriented to residue 218 in the face of same direction by all rings 200 of this technology.The projection 222 that detects on ring 200 inner peripheral surfaces is very important, can make ring 200 orientations like this, so that film 204 is joined on the ring 200 of cast gate residue 218.Can guarantee that like this residue 218 does not expose, because in some cases, the existence of residue 218 may stimulate user.
Correctly directed for guaranteeing ring 200, can be with reference to Figure 15.Ring 200 stands on their periphery in lifting conveyer 242, and moves towards video camera 241.Along with they move towards video camera 241, ring 200 is compressed and produces a flat 243, and this part is about one and half in an illustrated embodiment, thereby makes video camera 241 can see projection 222 on ring 200 inner peripheral surfaces.The position of the projection 222 on video camera 241 identification rings 200 inner peripheral surfaces, subsequent signal is given the directed device 244 away from track, and this device is oriented residue 218 up with ring 200.Video camera 241 preferably adopts the Acuyty of IVS ExpressVision company
TMThe existence that software is discerned projection 222 whether, and then the orientation of identification ring 200, thus contact rotating vane 246 made their orientations before ring being placed on the support plate 16.
Further referring to Figure 16 and Figure 17.These accompanying drawings represent that ring 200 moves to a preferable orienting device 244 by lifting conveyer 242, so that make ring 200 orientations.Orienting device 244 preferably includes a static blade 245 and a rotating vane 246, and this rotating vane contacts with a rotary solenoid 248.Rotary solenoid 248 induction is from the signal of video camera 241, and transmits the signal to rotating vane 246, thereby touches ring 200 towards 247 directions, make residue 218 on the output transport 26 towards above.Output transport 26 can have a wall 249, and it can line up ring 200 two row, so that insert support plate 16.
In a preferred embodiment, module 240 has an additional ring testing fixture 260 (Figure 18), with the circularity of judging ring 200 and flatness whether in predetermined scope.Ring testing fixture 260 is arranged on the back of ring orienting device 244.Ring testing fixture 260 has one and observes the machine PS 265 of ring 200 when conveyer 26 moves at ring 200, and has a flatness checkout gear 267.Best, ring 200 passes through ring testing fixture 260 with the speed of 300 to 400 of about per minutes.
At this some place, or the robotic arm 30 by as shown in Figure 5, or by some other release, ring 200 is picked out or removed one by one.Then, ring 200 is inserted the Zhu Kongzhong of support plate 16.Can adopt a robot arm 34 from passage 26, to pick up ring 200, and they are inserted support plate 16.When robotic arm 30 uses with a conveyer 12, on conveyer 12, form all blocks 13, this block is changed support plate 16 with each two capablely, makes robotic arm 30 two row rings 200 can be inserted support plate 16 before support plate 16 moves to next block 13.Except using robotic devices, another kind of mode is, ring 200 can be shoveled out from the row that picks out, and place the release of a coin transducer formula, this device manually places each ring 200 funnel of aliging with the hole 18 of support plate 16, and the insertion push rod is extensible to push hole 18 by inserting the route frame with ring 200.
In another case, ring 200 remains in the support plate 16 by frictional fit, and this can prevent to fall in ring 200 process for making below support plate 16 outsides, is shaped and is unloaded down from support plate 16 up to utensil.Frictional fit makes can be packed into from top support plate 16 and unload from the bottom of ring 200, but because it need not form the ledge of support loop 200 in hole 18.Because hole 18 does not contain ledge or other any projections, thereby ring 200 can be pushed away via hole 18 fully.When ring 200 was in support plate 16, they were limited fully in the motion of X-Y direction (see figure 6).
In an illustrated embodiment, when 100 rings 200 are inserted support plates 16 and when making all holes 18 all contain a ring 200, plate 16 is sent to heat-sealing station 40.Referring to Fig. 6-9.The supporting station 59, one that heat-sealing station 40 has a loading plate 16 makes diaphragm 204 feedings feed mechanism 46 and two diaphragm rollers 42 by heat-sealing station 40.This diaphragm is thinner, and about 0.011 inch, and walk around several cylinders 45 and form a moderate circle 44.Then, diaphragm 204 passes between a cope match-plate pattern 56 and the lower bolster 58, and these two templates separate one section enough distance, passes between them to allow diaphragm 204.In a preferred embodiment, this segment distance is about 0.25 inch.Diaphragm 204 is supplied to mechanism 46 at last and clamps.At the diaphragm 204 of hot sealing process back, promptly fabric 206, in the ash can that goes out of use 48.
When support plate 16 is arranged on the supporting station 59, feed mechanism 46 feeding diaphragms 204 and make the new part of diaphragm 204 be positioned at the top of support plate 16.Then, will be formed with circular ridge 19 in the lower bolster 58 in hole of aligned in position of rings 200 reduce and place in the groove 15 of support plate 16, as shown in Figure 8, gravity pulls down diaphragm 204, makes diaphragm 204 touch lower bolster 58 and contacts the top of ring 200.Diaphragm 204 is held on the top of ring 200 and is flat condition substantially.Cope match-plate pattern 56 helps to make diaphragm 204 remain in the appropriate location.
Then, with a heat seal tool 50 or claim the square formation of joining tool to reduce to touch diaphragm 204, as shown in Figure 9 by cope match-plate pattern 56.The size of each heat seal tool 50 is made the pressure point that makes instrument 50 and accurately is positioned on the ring convex shoulder 216 gap at the edge of pair instrument 50 is arranged there, thereby joint can not form residue.The flexibility of elastic band 200 and toughness allow ring 200 and aliging of joining tool 50 that the tolerance of broad is arranged.Be delivered to the supporting station 59 of bearing load by support plate 16 from the power of support plate 16.In a preferred embodiment, support plate 16 does not support the load that heat seal tool 50 is produced.
As shown in Figure 7, heat seal tool 50 is by 52 heating of heat (cal) rod-type heater, and every bar has five heat seal tool 50.The bar of heating is installed on a water-cooled platen 54.Heat seal tool 50 keeps about 360 °F.When heat seal tool 50 reduces and when extending through upper and lower template 56,58, their contact diaphragms 204 (Fig. 9) about four seconds, thus diaphragm 204 is engaged in ring 200.The conjugative component of ring 200 and the diaphragm in ring 200 204 is called tympanum 208.Residue 218 on being formed at ring 200 is up the time, and as Fig. 8 and shown in Figure 9, diaphragm 204 is enclosed in above it, thereby residue 218 be cannot see, the ring 200 of outstanding utensil 214 and stimulate vagina.Therefore, the residue side that diaphragm 204 is engaged in ring 200 can form more comfortable thereby also better utensil 214.
After engaging formation, heat seal tool 50 remains on the appropriate location, and simultaneously, template 56,58 is mentioned together, and the diaphragm 204 that is not tympanum 208 parts is separated with ring 200.This is isolating be because around the diaphragm 204 of each heat seal tool 50 instrument 50 with diaphragm directly when instrument is engaged in ring 200 50 times and melt.In addition, the periphery of heat seal tool 50 is sharpened slightly.Then, heat seal tool 50 is elevated and by template 56,58 retrieving tools 50.Cope match-plate pattern 56 can be removed any residual diaphragm 204 on the heat seal tool 50.Then, the diaphragm-operated support plate 16 that contains new shaping is transferred into preheating station 60.
Referring to Figure 10, it represents preheating station 60.Carry out efficient vacuum and extrude required temperature for diaphragm-operated temperature is elevated to, need a preheating station.In a preferred embodiment, tympanum should be about 250 °F when arriving the vacuum forming station.As everybody knows, diaphragm 204 is in that to remove the thermal source postcooling very fast.Therefore, preheating station must be close to the vacuum forming station, to reduce the heat transfer time between these two stations as far as possible.Short heat transfer time makes preheating station can remain on lower temperature, reduces the required time quantum of preheating station, and then reduces the total time amount of manufacturing process, reduces the capacity of required heater, reduces the heating power waste.
If the surface of heating is positioned at the inboard of heat seal tool 50, this instrument contacts diaphragm 204 simultaneously and its temperature is increased to suitable hot forming temperature, then can save preheating station 60.
Referring to Figure 11 and Figure 12.Vacuum forming station 80 has 100 vacuum forming die cavities 82, and they are installed on a fixed upper platen 84 in the mode of ten row, ten row, thereby corresponding with 100 tympanums 208.Each vacuum die cavity 82 has for suction air with vacuum vacuum hole 94.In a preferred embodiment, each die cavity 82 has the hole 94 of five 0.015 inch diameters.These holes 94 are connected in the internal communication chamber 98 in vacuum die cavity 82, and an independent vacuum pipe (not shown) extends to each die cavity 82 outside from this connected chamber.This vacuum pipe has a pick off (not shown), monitors in each die cavity 82 whether aspirate into suitable vacuum, and this information is delivered to the programmable logic controller (PLC) of control manufacturing process.Vacuum die cavity 82 remains on one and can fall less and to freeze probability and to make the efficient temperature of vacuum forming process.In a preferred embodiment, this temperature is about 150 °F.Be provided with a water cooler or heater 86, to cool off on demand or heating, vacuum die cavity 82.
The vacuum forming station also has 100 cores 92, and they extend out from one first lower platen 90.These cores 92 are arranged to ten row, ten row, and with the center-aligned of vacuum die cavity 82.Core 92 is maintained at about 220 °F or than low 20 to 30 of the temperature of the diaphragm 204 of tympanum 208.One water cooler or heater 96 are set, with cooling on demand or heating core 92.
Along with first lower platen 90 begins to reduce, between about one second to the one second half in core 92 contact diaphragms 204 backs, a vacuum is imported vacuum die cavity 82.Vacuum is clamp-oned die cavity 82 with diaphragm 204, forms storage tank 202.Because the diaphragm 204 of tympanum 208 centers extends farthest in die cavity 82, thereby cooling diaphragm 204 and make it can under the effect of the power that vacuum produced, not extend too thinly.Because the center is colder, it can not extend resemble diaphragm 204 heat part severity, therefore, the sidepiece of diaphragm 204 must extend more morely, is filled up by diaphragm 204 to guarantee die cavity 82.Like this, can produce the suitable storage tank of center thickness 202.In addition, keep the temperature of vacuum die cavity 82 can prevent to freeze, and help the accuracy of storage tank thickness.In an application scenario of a preferred embodiment of vacuum forming station 80, the thickness of storage tank 202 is from the about 0.010-0.011 inch at the most close ring 200, to about 0.004-0.007 inch at shoulder 210 places, the about 0.001-0.003 inch that arrives lacuna 212 places does not wait.
After a scheduled time, stop vacuum, second lower platen 88 is reduced.Whole vacuum forming operation should continue ten to 15 seconds.Programmable logic controller (PLC) is write down any position that does not produce the vacuum die cavity of suitable vacuum, thereby the utensil 214 of this position can be rejected at blanking station 100 places.Then, support plate 16 is sent to blanking station 100.
As mentioned above, utensil 214 is through vacuum forming.Yet also available other method of utensil 214 forms, such as physically forming utensil with core or pressure-type instrument and/or form a pressure differential between second side of diaphragm-operated first side and diaphragm 204.Formed pressure differential can be under any combination of above-mentioned, following pressure or under the atmospheric pressure between first and second sides of diaphragm 204, as long as have pressure differential between first and second sides of diaphragm 204.And, when utensil 214 is when forming by a pressure differential, can form such pressure, make that utensil 214 can be by pushing away or membrane sheet 204 forms.
Referring to Figure 13, support plate 16 is positioned at blanking station 100.The localizer of one servo control mechanism control is regulated the position of support plate 16, and makes programmable logic controller (PLC) can determine whether a concrete utensil 214 should be rejected.Blanking station 100 has the push rod 102 of one first output row 104, and they can vertically move respectively individually.The size of push rod 102 is made with push rod 200 and is matched.Blanking station 100 also has the push rod (not shown) of one second output row (not shown), and they can vertically move synergistically.The size of these push rods is made with push rod 200 and is matched.
Support plate is arranged to: the delegation in its ten row utensil is positioned at the below of the first output row 104.Programmable logic controller (PLC) determines which utensil 214 is qualified, and drives each push rod 102 corresponding to qualified utensil 204.Push rod 102 vertically moves and push rod 200 is upwards pushed away, thereby releases qualified utensil 214.Qualified utensil 214 is fallen on the conveyer 106, and is transported to the multiple package position (not shown).Then, support plate 16 is arranged to: ten utensils of first row are positioned at the second output row (not shown) below, and ten utensils of second row are positioned at the below of the first output row 104.The second output row (not shown) moves its push rod synergistically, thereby remaining utensil is pushed a collecting receptacle, and they are corresponding to underproof utensil, and the vacuum transducer of these utensils shows does not keep a suitable vacuum.Support plate 16 is fed once more, advances by the first and second output row up to all ten row utensils are all right.The blanking operation can be programmed equally, by the push rod 102 that can independently move on the first output row 104 underproof utensil 214 is released support plate 16, and with qualified utensil 214 collaborative releases.In another kind of system, pick off is set to guarantee not stay utensil 214 in the support plate 16.
Referring to Figure 19, another embodiment of the present invention comprises employing one automatic inspection system 250.It is after 80s that this automatic inspection system 250 is arranged on the vacuum forming system along manufacturing system.Automatic inspection system 250 is positioned support plate 16 between a pressure platen 252 and the supporting platen 254.When support plate 16 was between pressure platen 252 and supporting platen 254, automatic inspection system 250 was sealed the bottom of cup 214.Seal to produce by ring 200 is combined with sealing cup 255, thereby make cup 214 sealings.Air is pumped into cup 214 by air line 257 from compressed gas source 256.Set up air pressure in each cup 214.When cup 214 was charged into the air of scheduled volume, compressed gas source 256 was closed by a valve 259.The variation that pressure transducer 258 is measured pressure in the cup 214.Best, pressure measxurement continues several seconds.The loss of pressure can show in the cup 214 and has hole.Pressure transducer 258 measured pressure show that vicissitudinous cup 214 is indicated, this information is sent to the ejecting device of blanking station 100.
The chemical constituent of the elastomeric material that is adopted in the elastomeric method and system of above-mentioned manufacturing can provide the advantage of manufacture view.Except some characteristic of improving processing characteristics was arranged, this elastomer should be able to be finished some function, and these functions can be according to the concrete utensil made from said method with according to the concrete purposes of the utensil of manufacturing and different.For example, when utensil is used for the intravaginal occasion, need some physical characteristic, as described below.In addition, medicament or giving of material that utensil is used for such as medicine, sperm agent for killing, antibacterial etc. are applied, may need to consider to determine the required composition of utensil.
When first elastic part was the ring 200 of the above-mentioned vagina utensil that can be used as the vaginal discharge catcher, its material should be able to produce certain compressive strength and hardness.Another important characteristic of the loop materials of this utensil is: when temperature is elevated to body temperature by room temperature, and its ability loose and the adaptation vaginal wall.The compression ring stress of material is meant the self-healing power of the utensil that is made of this material.Here employed term " compression ring stress " is meant at the ring 200 of intravaginal device and keeps the part fully relatively of the elastic band 200 required power that contacts with each other at room temperature the time.The proper compression loop strength of the ring 200 of intravaginal device is about 250 and restrains one kilogram.Under these values; the self-healing power of elastic band 200 is enough big; thereby can guarantee that ring 200 expands with enough intensity; vaginal wall is formed required sealing; and can guarantee disadvantageous displacement not to take place; but intensity is not excessive and be difficult to utensil 214 is inserted yet, and perhaps causes pain or other discomfort.
Hardness is meant the rigidity of material when being the shape of ring 200.The ring 200 of above-mentioned intravaginal device should have enough rigidity, keeping its shape and required elasticity self-healing power is provided, but has enough flexibilities, meets different shape cosily to regulate.When the Xiao A hardness that records according to following test method-ASTMD2240 when material was about 55 to 75, preferably 60 to 70, the material of ring 200 can obtain preferable balance between rigidity and flexibility.
A kind of method that production has the elastic part of these characteristics is that polyethylene is mixed with a thermoplastic elastomer (TPE).Low-density polyethylene is a kind of harder relatively and more inflexible material, and it can be mixture and rigidity is provided, improves machinability and comparatively cheap.But low density polyethylene (LDPE) can make the zygosity of loop materials bring up to the degree of storage tank material, because be easy to thermal bonding in itself.Because TPE is relative softer material, thereby they can produce a kind of different composite materials that change that loop strength and hardness are measured with polyethylene and TPE that compress with proper ratio and the combination of low density polyethylene (LDPE).For example, TPE has anisotropic flow behavior, this means that its strand can be directed in the plasticity flow process, thereby improves the rigidity perpendicular to the injection moulding direction.If there is not anisotropic flow behavior, realize perpendicular to the required rigidity of injection moulding direction being difficult to.
A kind of preferable TPE is the styrene-olefin block copolymers of " Kraton " by the sale of Shell Chemical company, trade mark.Polyethylene can be regulated with the ratio of TPE, with the rigidity and the flexibility of control ring 200.Polyethylene is 1: 2 with one of TPE preferable ratio, but also can be to change between about 50: 50 to about 15: 85.This material can preferentially be selected for use, and to be used in the toxicity aspect be acceptable because it is worn for inside, obtains economy, and processing easily easily.In addition, this mixture can provide ring 200 suitable elasticity, to remain on the frictional fit in the support plate 16 and sealing with heat seal tool 50 and vacuum die cavity 82 is provided.
When second elastic part is storage tank part 202 by 204 hot formed nonplanar film of plane elasticity material, in the foregoing description, elasticity storage tank material should have many Performance Characteristicses identical with loop materials.For example, diaphragm 204 must be able to be engaged at an easy rate, and must be suitable for inside aspect toxicity and wear usefulness.The diaphragm 204 that is used for the menstruation occasion be about 0.011 inch thick, but also can be about 0,007 to 0,020 inch thick.For other application scenario, the thickness of diaphragm 204 can be different.For example, give deposited occasion for material, the thickness of diaphragm 204 can be more bigger.Can use plain film, because it is than the easier processing of on-plane surface elastic component with join on the ring 200.The thinnest part that is used for the finished films storage tank of menstruation occasion preferably be about 0.002 inch thick, but the thickness of thin part can be between about 0.002 to 0.006 inch.For other application scenario, the thickness of diaphragm storage tank can be different.For example, give deposited application scenario for material, the thickness of diaphragm storage tank can be more bigger.Therefore, if necessary, diaphragm material should be able to be by hot forming to being about 20 percent of its original thickness.
In view of many reasons same as described above, diaphragm-operated composition can preferentially be selected TPE/ low density polyethylene (LDPE) prescription for use.Low density polyethylene (LDPE)/TPE mixture is nontoxic, can produce good engagement characteristics when being engaged in ring, because polyethylene is easy to thermal bonding in itself.The control polyethylene can produce required rigidity and flexible degree with the ratio of TPE.Preferable ratio is about 1: 2, but also can be between about 50: 50 to about 15: 85.Diaphragm 204 compositions also show good performance in heat forming technology, because it can be sucked in the vacuum die cavity 82 more deeply, and can not form hole or thin position.Other feature performance benefit of this material comprises the softness of material and the sensation of similar meat, and this makes material more comfortable, also has it by compression or the quiet performance during wrinkle.And its composition obtains and economy easily.
Can adopt the thermoplastic elastomer of other type to make utensil 214, but these complex differ and provide become that branch has good of above-mentioned ring 200 and diaphragm 204 surely and reliable engagement characteristics, economy or properties of product.
More than description and accompanying drawing only are to be used for illustrating preferred embodiment of the present invention, and do not illustrate that the present invention only limits to this.In the spirit and scope of appended claims, all should think a part of the present invention to any modification modification that the present invention did.
Claims (24)
1. a manufacturing has the method for the utensil of one first elastic part and one second elastic part, and described second elastic part is made into a molded non-planar, said method comprising the steps of:
With described first elastic part support plate of packing into;
Described second elastic part is placed on described first elastic part;
Described second elastic part is heat-sealed in described first elastic part;
Described first and second elastic parts of preheating;
By producing a vacuum described second elastic part is sucked a chamber, thereby form a molded non-planar; And
This utensil is unloaded from described support plate.
2. a manufacturing has the method for the vaginal discharge collection utensil of a ring and a storage tank, said method comprising the steps of:
With the ring support plate of packing into;
Diaphragm is placed on the described ring;
Described diaphragm is heat-sealed in described ring;
Described ring and diaphragm are preheated to about 290 ° and lasting about 8 seconds;
Described support plate is sent into a vacuum chamber, simultaneously described ring and diaphragm are maintained at about 250 temperature;
Rising one contains second lower platen that at least one is heated to about 220 core, and this core contacts with described diaphragm-operated core;
Cool off described diaphragm-operated described core with described core;
By producing a vacuum described diaphragm is sucked described chamber, thereby form storage tank; And
Catcher is unloaded from described support plate.
3. method as claimed in claim 2 is characterized in that described ring is formed by a Shooting Technique.
4. method as claimed in claim 3 is characterized in that, described ring is molding in an injection molding die cavity, and this die cavity comprises that a hot runner system and adds hot runner for a short time, and these cast gates form at least one residue on a side of described ring.
5. method as claimed in claim 2 is characterized in that, described ring has and is about 250 and restrains one kilogram compression loop strength.
6. method as claimed in claim 2 is characterized in that, described ring has and is about 55 to 75 Xiao A hardness.
7. method as claimed in claim 6 is characterized in that, described ring comprises a polyethylene and a thermoplastic elastomer.
8. a manufacturing has the equipment of the utensil of an elastic band and one first elastic part, and described first elastic part is made into a molded non-planar, and described equipment comprises:
One installs to material loading station on the support plate with described elastic band;
One puts on heat-sealing station on the described elastic band with described first elastic part;
One is elevated to the preheating station of one second temperature with the temperature of described elastic band and described first elastic part from one first temperature;
One forms the forming station of a molded non-planar with first elastic part of utensil; And
One unloads the blanking station of described utensil.
9. equipment as claimed in claim 8 is characterized in that, described forming station is a vacuum forming station of first elastic part being inhaled into a molded non-planar with vacuum.
10. equipment as claimed in claim 9 is characterized in that described elastic band remains in the support plate by frictional fit.
11. equipment as claimed in claim 10 is characterized in that, the outer surface of the described elastic band of support plate CONTACT WITH FRICTION.
12. equipment as claimed in claim 11 is characterized in that, support plate has opening in top and bottom in described elastic band.
13. equipment as claimed in claim 8 is characterized in that, described material loading station comprises that one makes described elastic band directed so that place the device of described support plate.
14. equipment as claimed in claim 13, it is characterized in that, the described device of described elastic band orientation that makes comprises appearance inspection device, so that elastic band is oriented: be formed at a residue on the described elastic band in the moulding technology along a predetermined direction orientation.
15. equipment as claimed in claim 14, it is characterized in that, described appearance inspection device is arranged to and can be carried out visual examination to described elastic band, and a signal is sent to a directed device, and described elastic band is positioned in the described support plate up with residue.
16. equipment as claimed in claim 15 is characterized in that, described appearance inspection device comprises a video camera.
17. equipment as claimed in claim 14 is characterized in that, described equipment also comprises the flatness of checking described elastic band and the device of circularity in addition.
18. equipment as claimed in claim 8 is characterized in that, described first elastic part is a diaphragm, and it is pulled through the top of the described support plate that a plurality of described elastic band are housed.
19. equipment as claimed in claim 18 is characterized in that, described heat-sealing station comprises that described first elastic part that will be patching is engaged in the device of described elastic band.
20. equipment as claimed in claim 19 is characterized in that, described heat-sealing station further comprises one from the unnecessary diaphragm-operated device of described elastic band excision.
21. equipment as claimed in claim 20 is characterized in that, is that described device is preheating to second temperature from first temperature when being the diaphragm-operated form that joins on the described elastic band in described preheating station at described first elastic part.
22. equipment as claimed in claim 21 is characterized in that, described first elastic part is inhaled into a molded non-planar.
23. equipment as claimed in claim 8 is characterized in that, described equipment comprises also in addition one determines the test set whether described utensil fully has been shaped.
24. equipment as claimed in claim 23 is characterized in that, described test set comprises pressure test device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97196157 CN1224361A (en) | 1996-07-03 | 1997-07-03 | Method and system for mfg. elastometic articles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60/021,236 | 1996-07-03 | ||
| CN 97196157 CN1224361A (en) | 1996-07-03 | 1997-07-03 | Method and system for mfg. elastometic articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224361A true CN1224361A (en) | 1999-07-28 |
Family
ID=5179603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97196157 Pending CN1224361A (en) | 1996-07-03 | 1997-07-03 | Method and system for mfg. elastometic articles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182737A (en) * | 2011-07-20 | 2016-12-07 | 耐克创新有限合伙公司 | Hot forming sheet material charging appliance and method |
| CN115107285A (en) * | 2022-06-16 | 2022-09-27 | 乾德生物医疗技术(重庆)有限公司 | Method for manufacturing blood purification device |
-
1997
- 1997-07-03 CN CN 97196157 patent/CN1224361A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182737A (en) * | 2011-07-20 | 2016-12-07 | 耐克创新有限合伙公司 | Hot forming sheet material charging appliance and method |
| CN115107285A (en) * | 2022-06-16 | 2022-09-27 | 乾德生物医疗技术(重庆)有限公司 | Method for manufacturing blood purification device |
| CN115107285B (en) * | 2022-06-16 | 2024-04-02 | 乾德生物医疗技术(重庆)有限公司 | Method for manufacturing blood purification device |
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