CN1012487B - Thermoplastic block shape feeding mechanism and manufacturing method - Google Patents

Abstract

The present invention relates to a solid thermoplastic block (64) which comprises sections (66 and 68) with alternate circular cross section and rectangular cross section, and a device (60) for melting and distributing thermoplastics. The device is provided with a ratchet wheel assembly (62) and a compression moulding forming mechanism (120), wherein the ratchet wheel assembly (62) can be operated by a thumb for driving the block (64) to the device (60); the compression moulding forming mechanism (120) comprises two chain like components (122 and 123). The compression moulding forming mechanism (120) can make moulds (124) in the components (122 and 123) move along a linear path section (139) in face-to-face relationship; simultaneously, molten thermoplastic is injected into the inlet end of the linear path section (139) to continuously manufacture the block (64) by compression moulding.

Description

Thermoplastic block shape feeding mechanism and manufacturing method

This application is the part continuation application of No. 456346, the U.S. Patent application announced January 7 nineteen eighty-three, and has now become No. 4552287, the U.S. (issue on the 1985,11,12nd) patent.

This application has been discussed the device of such distribution fusion thermoplastic, and it is pressed into solid-state thermoplastic unit of plastic wherein by means of user's thumb, has also discussed the kenel of the solid-state thermoplastic unit of plastic that is distributed in this device and the manufacture method of this material piece.

Known have multiple being used for that the solid-state thermoplastic unit of plastic that the thumb by the user is pressed into is wherein carried out fusion thermoplastic distributor, for example No. 3204828, United States Patent (USP) with No. 3298572 in the existing process unit narrated.

Generally speaking, this class device comprises a drum with interior melting chamber, and melting chamber leads to by a nozzle and an outlet in this; Also comprise a sleeve, it has one one end to be fixed on through hole on the drum, and through hole leads to the end with this nozzle stands facing each other mutually of melting chamber thus.This sleeve is applicable to and holds an elongated columniform solid-state thermoplastic unit of plastic that this material piece is engaged in the through hole of sleeve tightly.Be equipped with the device that is used for heating this drum, to be melted in material piece end wherein, this device also includes a handle, its installation site can make operating personnel hold this handle with the finger of a hand, when the thumb with the another hand pushes away binder block and enters melting chamber by sleeve, force the thermoplastic of fusion to extrude melting chamber through nozzle.

Though this class device can effectively be worked and at the flow through thermoplastic of this kind device of control very big flexibility is arranged quantitatively, but when operating personnel put second thermoplastic piece end-to-end and oppress the outer end of this second material piece with respect to the material piece in the sleeve after, a problem will take place.This operator must keep this second material piece in place, and this has just occupied his second hand, and this hand perhaps will be used for for example disposing some just by the goods of this fusion thermoplastic on the coated.If the operator is not held in place this second material piece, must stop to remove the pressure that is added on this second thermoplastic piece the fusion thermoplastic plastic flow but resemble, perhaps before this second material piece front end enters this sleeve, pressure has been added to the axis direction that deviates from this material piece, at this moment the second material piece will fall or fly out from the material piece sleeve already, and this is inconvenient, distractive and can expends operator's time.

Distribute a kind of device of fusion thermoplastic in the inventor's United States Patent (USP) 4552287, to be described to, now introduced among the application as a reference, wherein also be provided with such parts, be used for keeping second solid state heat unit of plastic at place, the material piece end in sleeve already and it is positioned properly, and a kind of fusing bucket in aforementioned this class device, second hand can vacating the operator whereby is so that be engaged in other activity.

But this device can only keep three blocks of thermoplastics at the most, just requires reinforced continually when it uses continuously.

The inventor's U.S. Patent application has been described a kind of bin stock assembly that can be used in No. 4552287 described devices of my United States Patent (USP) for No. 570245.Dispose such parts in this bin stock assembly, it can make the same thermoplastic piece in sleeve of thermoplastic piece of lowest part, keep end-to-end relation and be positioned properly, the material piece that can allow the operator oppress this lowest part with its thumb simultaneously enters melting chamber by sleeve, and keeps the material of thermoplastic piece to pile up neatly the top that vertically is positioned at this minimum material piece.By a reciprocating motion with the slide plate of thumb operation, can impel this material buttress to drop to the position of next minimum material piece, and with planting the thermoplastic piece clout collimation that operation is pressed into by sleeve thus, such slide plate both provided a kind of push rod for the material piece of lowest order, also provided supporting for the buttress of the material on these minimum material pieces.Though relatively large thermoplastic can easily be operated and maintain to this bin stock assembly, but its volume is huge than what expect, and must add many less thermoplastic pieces.

The invention provides a kind of solid-state thermoplastic shaped plastics piece of novelty, it more easily melts than columniform thermoplastic piece and can distribute by the distributor of the above-mentioned type; The feeding mechanism that is used on this class distributor also is provided, and it can be by the operation of user's thumb, combines with this new type piece that it is very compact to add, and just can make very big this novel piece feed this distributor easily and makes the reinforced time reduce to minimum; Also simple and effective manufacturing installation and manufacture method are provided simultaneously for this new type piece.

According to this invention, a kind of so solid-state thermoplastic unit of plastic is provided, it includes the cylindrical part in the consistent size that axially and directly makes progress of coaxial cardinal principle, and along this thermoplastic piece axially, have rectangular cross section and its Diagonal Dimension is substantially equal to the part of above-mentioned cylindrical part radial dimension and is separated by some; A kind of new-type feeding mechanism that is adapted on a kind of fusion thermoplastic plastic device that distributes this pattern also is provided, and it includes a position and in position goes up the framework that can make the handle that an operator holds with the finger of a hand; A drum is installed on this framework and has one by a nozzle and the interior melting chamber that leads to of outlet; A sleeve, it has one to be installed in through hole on the drum with the one end, and this through hole leads to an end of above-mentioned melting chamber and this outlet face-off, and this sleeve is fit to contain solid-state thermoplastic piece, makes this material piece end in this melting chamber and this material piece is outstanding by this sleeve; And be used for heating drum to be melted in the parts of material piece end wherein.Feeding mechanism comprises that being adapted at above-mentioned sleeve is attached to wall components on the framework in contrast to an end of melting chamber, and this wall components defines a passage, is used for guiding solid-state thermoplastic unit of plastic collimatedly with the sleeve through hole; And one slide-plate, its upper surface is adjacent with a side of material piece, by having a breach to can be used to include in the end of operator's thumb on the opposite side of this upper surface, this slide plate is installed on the framework, be can be along a route that roughly collimates with melting chamber, from moving to one comparatively near the progressive position of this sleeve, turn back to its going-back position again with the separated going-back position of this sleeve.Above-mentioned breach can be scratched the shank portion of stopping for the thumb that stretches into the operator, make this operator can for slide plate its retreat and progressive position between manual reciprocating motion is provided.Drive disk assembly slide plate thus drives, be used for engaging the cylindrical part of thermoplastic piece, and push this thermoplastic piece to melting chamber during from its going-back position to progressive position, and move around the cylindrical part of thermoplastic piece and along this material piece during going-back position by its progressive position at this slide plate at this slide plate.The parts that make this thermoplastic piece collimation also are housed, so that engage rightly for transmission device in above-mentioned passage.

Though such feeding mechanism is very compact, but can feed the new-type thermoplastic type piece advance to have above-mentioned new configuration, the length of such material piece can substantially exceed the length (for example from 2 inches to 12 feet long more than) of commercially available cylindrical material piece, thus can make device reinforced the time depletion to minimum.

Above-mentioned thermoplastic type piece can the coiled plate-like be stored (for example the coiled diameter is 50 centimetres a coil) than good many of cylindrical block flexibility.In addition, when this novel thermoplastic materials piece is fed related device, during compared with feeding cylindrical plastic piece, as long as less power just can obtain the thermoplastic of the equal fusing of output; Obviously this is because this kind material piece has around the space on the periphery in that its cylindrical portion is intersegmental, holds the position for the thermoplastic that has melted provides, and can allow the solid-state thermoplastic of this kind more directly press on the drum that contacts heating.

Novel thermoplastic piece like this is easy at following mechanism's internal shaping, such mechanism comprises two class chain members, each member comprises a collection of pivoting and the mould of interconnective class bulk, and this batch mould defines a fetch bit in the cavity of wherein expecting the piece profile when face-to-face; Comprise and be used for making each material piece following a straight line path line componental movement Face to face along this chain member; Also include such parts, be used for the fusion thermoplastic is injected into along an end of the cavity that defines between the above-mentioned mould of this straight line path part.Remove this, a mechanism also can be set be used for when the material piece is deviate from mould, it being cut off by predetermined length.

The present invention will contrast accompanying drawing and be further described, in several of these figure with the identical reference number number identical parts of expression, wherein:

Fig. 1 is the side view of first embodiment of the distributor described in the inventor's No. 4552287, the United States Patent (USP);

Fig. 2 is the side view of distributor among Fig. 1, but has removed some part so that show bright detailed structure;

Fig. 3 is the part sectioned view of an amplification of drum, sleeve and shelves ring between the distributor of Fig. 1;

Fig. 4 is approximate profile along the amplification of 4-4 line intercepting among Fig. 2; And

Fig. 5 is the end-view of distributor among Fig. 1;

Fig. 6 is the perspective view with solid-state thermoplastic unit of plastic of configuration of the present invention;

Fig. 7 is the side view that is similar to a kind of distributor that installs shown in Fig. 1, and just it includes according to a kind of different manual feeding mechanism of the present invention, is used for feeding this solid-state thermoplastic unit of plastic shown in Figure 6;

Fig. 8 is approx along the profile of an amplification of 8-8 line intercepting among Fig. 7;

Fig. 9 is the enlarged drawing of the part of the slide plate in the distributor and transmission device among Fig. 7, and they are used for a solid state heat unit of plastic is pressed in the distributor;

Figure 10 is the part figure that slide plate shown in Figure 9 and transmission device one amplifies, they just in the distributor a solid-state thermoplastic unit of plastic retreat.

Figure 11 is a partial plan layout that is used for making this mechanism of the present invention of configuration thermoplastic piece as shown in Figure 6;

Figure 12 and 13 is respectively the inlet and the part figure of the port of export through amplifying of mechanism shown in Figure 11, and some parts of this mechanism have been cut open and taken down so that show bright its detailed structure;

Figure 14 is approx along the part sectioned view of the amplification of the 14-14 line of Figure 12 intercepting;

Figure 15 is approx along the part sectioned view of the amplification of the 15-15 line of Figure 13 intercepting; And

Figure 16 is the detail drawing of looking closely that is included in one of Figure 11 a collection of mould to the mechanism shown in Figure 15;

Figure 17 is the plane that is used for cutting a kind of mechanism of the thermoplastic piece of being produced to mechanism shown in Figure 16 by Figure 11 according to of the present invention;

Figure 18 is the part sectioned view of an amplification of mechanism shown in Figure 17, and

Figure 19 is the part sectioned view that intercepts along 19-19 line among Figure 18 approx.

Come below with reference to the accompanying drawings, show among Fig. 1 to 5 and understand and unifiedly to indicate with reference number numbers 10, a kind of distributor that is used for the fusion thermoplastic, No. 4552287, the United States Patent (USP) that this device 10 is taked the inventor is from the hurdle 2, row 55 is to the hurdle 8, usedly in the row 4 describe with a kind of several numbers, above-mentioned patent has absorbed among the application as a reference.

Identical with the distributor that is used for thermoplastic in the known existing technology, distributor 10 comprises that has a two-part framework 12; Drum 14 is installed between two parts of framework 12, has an interior melting chamber 16 to lead to via the nozzle 21 of discharging channel 17 by a valving 18 and an outlet 19; And one sleeve 20, one ends that have cylindrical hole 22 end that is installed in 22 of the through holes melting chamber 16 that herewith discharging channel 17 is opposite on the cylindrical member 14 lead to.This sleeve 20 is fit to be used for contain a columniform solid-state thermoplastic unit of plastic 24 in its cylindrical hole 22, and be slightly gapped cooperation, even when the diameter of this material piece 24 is that to be in going up of its margin of tolerance also be so in limited time, and an end that makes this material piece 24 is melting chamber 16 in and this material piece 24 passes through the through hole 22 of this sleeve 20 and gives prominence to.Device is provided with the parts of heating drum 14 in 10, is used for melting charge piece 24 end therein.Comprise one handle 26 in the framework 12, its position can make an operator live this handle 26 with the finger grip of a hand, thumb with the another hand pressurizes simultaneously, force this material piece 24 by sleeve 20 and enter melting chamber 16, press this fusion thermoplastic to discharge melting chamber 16 with nozzle 21 simultaneously via valve part 18.

Different with the device of existing technology, this device 10 end place opposite with drum on its sleeve 20 also comprises a seat member 28,28 of this seat member are provided with such parts, can be used to admit and maintain one second solid-state thermoplastic unit of plastic 24, make with same 24 collimations of thermoplastic piece in sleeve 20 of end-to-end relation, offer an opportunity for operator's thumb simultaneously, power is added in the end of the material piece 24 opposite with sleeve 20, presses this second material piece 24 by sleeve 20 and enter melting chamber 16.

As shown in the figure, frame member 28 includes framework 12(Fig. 5) separate and two relative locked parts 30, they prominent to sleeve 20 separated positions in handle 26, and be on the relative both sides of sleeve 20 axis extension lines.These two locked parts 30 are keeping mutual biasing by spring members, and this spring part comprises the groove shape spare 29 of a spring steel, top surface round above-mentioned two parts of framework 12 engages, help keeps together these two parts of framework 12, and relative arcuation protuberance 27 is arranged tiltedly facing on the outer surface of framework 12 locked parts 30.The distance that far-end separated of locked part 30 is less than the diameter of thermoplastic cylindricality piece 24, but this distance is enough to make material piece 24 laterally to be crushed on therebetween, left mutually by to be allowed these two locked parts 30, leave motion leeway betwixt for piece material 24 according to the direction opposite with protuberance 27 direction of displacement.Remove this, these two locked parts 30 have recessed inner surface in opposite directions, can be from the cylindrical sides of profile applying thermoplastic piece 24 therebetween, keep this material piece 24 and a material piece 24 collimations in sleeve 20, allow this material piece 24 to be in axial sliding simultaneously, and the thumb that allows the operator pushes second material piece 24 in the sleeve 20 in 30 motions of these two locked parts.

This distributor also comprises a pressure plare 32, is suitable for reclining being in the end of the thermoplastic piece 24 of outermost with respect to melting chamber 16, and transmits power therebetween between this material piece 24 and operator's thumb.One side of pressure plare 32 has an elongated slipping part 33(Fig. 2), slidably be installed in the guide rail 34 that defines between framework 12 two parts, this pressure plare 32 can be moved with material piece 24, the profile of this pressure plare then can be by between two locked parts 30, so this plate 32 can be used for material piece 24 is pushed in the sleeve 20 fully, the power on the plate 32 of will being added in simultaneously be directed at material piece 24 vertically, and the thumb that can prevent the operator touches any fusion thermoplastic that thermoplastic piece 24 and any (under exceptional condition) may be expressed to sleeve 20 outer ends.Pressure plare 32 comprises two alar parts 35, each slave plate one side-prominent, when pressure plare 32 is when being used for being pressed into material piece 24 in the sleeve 20, this alar part 35 is in the lower position of locked part 30, in the alar part 35 any one can both retrain with hand, drive pressure plare 32 and leave sleeve 20,, a new thermoplastic piece 24 is placed between two locked parts 30 so that after last material piece 24 has pushed sleeve 20.

Two parts of framework 12 are by suitable high temperature resistant polymeric material (for example can be from Delaware State Wei Mingdun city E.I.Dupon de Nemours company, with trade name Dupon, the sort of material that Zytel FR50-NC10 buys) compression molding.Two parts of this of framework 12 all be by roughly radially outside the drum 14 some outstanding separated pillars 36 formed, this class pillar 36 provides condition, from then on the nozzle 21 of the major opposing side of framework 12 and distributor 10 is installed on 10 horizontal planes that are located at separately, have simultaneously jack to be fit to include in a kind of silk 31(Fig. 5 that roughly takes the shape of the letter U on this class pillar 36) the end, can make the above-mentioned further away from each other horizontal plane of device 10 in case of necessity.

Sleeve 20 is made with extrusion by the heat-resisting polymeric material (for example teflon) of rigidity, make it have the inner surface of polishing, the imperceptible cut that longitudinally stretches is then arranged on this inner surface, be beneficial to thermoplastic by sleeve 20, particularly after the thermoplastic of this molten state had cooled off also once more by device 10 heating already in sleeve 20.

Sleeve 20 is by metal baffle ring 38(Fig. 2 and 3) and drum 14 engage, it is heated by the parts that heat drum 14, this baffle ring 38 has limited the fusion thermoplastic and has pushed between the material piece 24 of sleeve 20 and its inner surface.The baffle ring 38 of inlet is roughly cylindrical circular parts, the flange of separating vertically along radially outwardly projecting 39 is arranged on it is arranged in an end of the cylindrical socket in drum 14 ends, a sealing strip 40 that is pressed in 14 of baffle ring 38 and drum is arranged therebetween between these flanges 39 for sealing is provided.The end 41 relative with drum 14 of baffle ring 38 presses fit into a reduced pressure zone in inside of sleeve 20.Baffle ring 38 has a columniform inner surface, (this sleeve 20 can hold a material piece 24 with little gap to its diameter less than the internal diameter of sleeve 20, even it also is like this in limited time that this material piece is in going up of its tolerance), make that this baffle ring 38 will be with very little interference fit (for example through 0.025 centimetre interference), hold the material piece 24 that a diameter is in its margin of tolerance upper limit, perhaps will hold the material piece 24 that a diameter is in its margin of tolerance lower limit with about 0.050 centimetre matched in clearance.Surprisingly, its diameter can provide like this some and baffle ring 38 to make the material piece 24 of small interference fit, they will make for the baffle ring 38 of heating fully to melt on its whole periphery and be easy to be pressed into melting chamber 16, and those its diameters can provide this small matched in clearance or the thermoplastic piece 24 of interference fit, they fully close-fitting be incorporated in the baffle ring 38, make the melt polymerization material do not have significant quantity extrude and flow to the outer end of expecting the sleeve 20 between piece 24 and the sleeve 20 from material piece 24 and the melting chamber 16 between the baffle ring 38.

Device 10 also includes three metal (preferably brass) cooling flanges around sleeve 20 peripheries, and provide condition for the zone that in sleeve 20, forms predetermined temperature, wherein two be in the punishment of the end of the sleeve 20 of adjacency baffle ring 38 every very near temperature adjustment with flange 45, be used for regulating the temperature of the interior fusion thermoplastic in zone between baffle ring 38 and the sleeve 20, the refrigeration that roughly is in central authorities along the length of sleeve 20 then is used for cooling cover 20 with flange 48, the time become molten state to be limited in by this zone along sleeve 20, even make be one section of above-mentioned heater block work for a long time, during this period, the thermoplastic of fusion can not distribute from installing 10 yet.

Drum 14 is to be made by proper metal (for example aluminium), melting chamber 16 in drum 14, its border is limited by following position: one roughly is the frustum taper shape towards the inner surface that valve part 18 tilts, makes the polymeric material of fusion be directed to discharging channel 17 by valve part 18; And four equidistant separated radially in prominent beads 42, they provide the contact surface of heating outside above-mentioned frustum circular cone inner surface, with closing and make it fusing with it when thermoplastic piece 24 is pressed into melting chamber 16.Be used for heating the jack 44 that drum 14 and the electrical heating elements 43 of baffle ring 38 are arranged in melting chamber 16 below drum 14, one thermostat 46 that is fixed in these heating element heater 43 below channels is arranged simultaneously, be used for when this drum 14 when the temperature of thermostat 46 is crossed a predetermined maximum value (for example 200 ℃), cut off the power supply of supplying with heating element heaters 43 usually by power cable 47 and thermostat 46.

The valve part 18 that drum 14 and nozzle are 21 provides shutter means, the thermoplastic and the nozzle 21 that are used for limiting fusion are run out of, unless the power (for example about 0.9 to 1.8 kilogram power) that adds a pre-sizing with hand to the material piece 24 of this constant temperature in the fusion thermoplastic of melting chamber 16, to cause pressure.This kind valve part 18 belongs to poppet type, comprises that one is installed in a valve body 49 of drum 14 and 21 of nozzles, and this valve body 49 limits by nozzle 21 and links up melting chambers 16 and export that discharging channel 17 of 19.Discharging channel 17 by valve body 49 is closed by a valve head 50 usually, this valve head generally by a spring 52 facing to a valve seat displacement on the end of contiguous nozzle 21 on the valve body 49, this spring then is pressed on the flange on the valve body 49 and is fixed between the porous retardance dish 54 on the valve rod 53 of this valve, and this retardance dish 54 is installed in the valve body 49 in the mode that can slide vertically.Owing to be added to the pressure on the thermoplastic piece 24, the pressure that causes on the fusion thermoplastic in melting chamber 16 and discharging channel 17, can make the displacement of valve head 50 resistance springs 52 and leave its valve seat, and allow the thermoplastic of fusion discharge by this valve head 50 and via nozzle 21.But after the operator allays this pressure, 50 of this valve heads will return to its valve seat under the influence of spring 52 once more, and prevent in melting chamber 16 and the discharging channel 17 fusion thermoplastic effusion nozzle 21 is arranged again.

When using distributor 10, the operator at first connects power supply with power cable 47, allows heating element heater heat drum 14 and baffle ring 38.This operator inserts thermoplastic piece 24 in the through hole 22 that passes sleeve 20 then, catch handle 26 with a hand, and press to pressure plare 32 with the thumb of this hand, allow it along guide rail 34 slide and with 24 closings of material piece, to expect that then piece 24 pressed sleeve 20 and baffle ring 38 to enter into the melting chamber 16 of drum 14, here, the end of material piece 24 will be owing to touching drum 14, comprise touching outstanding bead 42 inwardly, become and be molten state.Even the diameter of working as material piece 24 is in going up in limited time of its margin of tolerance, because the inner surface of sleeve 20 will form a matched in clearance with the periphery of material piece 24,38 of this baffle rings have a columniform inner surface, it is interior through being slightly less than the internal diameter of sleeve 20, and are the upper limit or lower limits in its margin of tolerance according to the diameter of material piece 24, and form a slight interference fit or a very near matched in clearance with material piece 24.If there is an interference fit, the periphery that baffle ring 38 will melt thermoplastic unit of plastic 24 fully make its be easy to by; No matter be under any cooperation situation, baffle ring 38 will limit thermoplastic widely and get back between material piece 24 and the baffle ring 38 from melting chamber 16 extruding, that is turns back to thus between the inner surface of material piece 24 and sleeve 20.The pressure that is added on pressure plare 32 and the material piece 24 by hand can cause enough big pressure between the fusion thermoplastic in the melting chamber 16, this pressure will make the displacement of valve head 50 resistance springs 52 and leave its valve seat, and allow this fusion thermoplastic can flow out the outlet 19 of nozzle 21 around this valve head 50.During hand on allaying pressure plare 32, this valve head 50 will turn back under the influence of spring 52 on its valve seat again, stop this fusion thermoplastic stream of plastic and cross nozzle 21 and limit air and arrive fusion thermoplastic in the melting chamber 16, thereby limited this oxidation of fusion thermoplastic in valve part 18.There is no the fusion thermoplastic distributes by nozzle 21 if this heating element heater 43 works on segment length's time, the heat that then gathers can make material piece 24 near (being at least on the periphery of material piece) fusing mid point of sleeve 20, and this fusing will be subjected to the restriction of the cooling effect of refrigeration flange 48 here.If outage at this moment causes this fusion thermoplastic plastic cool and solidifies, and then connect power supply and come heating element heater 34, then the thermoplastic in the valve part 18 will be some thermoplastics that at first melt, and this valve part 18 can play the effect of a pressure-reducing valve for the pressure that forms owing to all the other thermoplastic fusings in the drum 14.Remove this, the level and smooth inner surface that vertically distributes fine line that has of sleeve 20 will help to expect that piece 24 gets loose from sleeve 20, press baffle ring 38 and enter melting chamber 16, cause that once more this fusion thermoplastic flows out from nozzle 21.

When the outer end of thermoplastic piece 24 arrives the outer end of sleeve 20, the operator can be used for pressure plare 32 returned along its guide rail by an alar part 35 and removes, simultaneously a new thermoplastic piece 24 laterally is pressed between two locked parts 30 of seat member 28, allow new material piece 24 and sleeve 20 keep suitable collimation relation therefrom, the operator also can be pressed into melting chamber 16 with pressure plare 32 with new material piece once more simultaneously.

Now referring to the Fig. 7 to 10 in the accompanying drawing, wherein show the distributor of understanding according to the present invention's design that is used for the fusion thermoplastic 60, the structure of device 60 is identical with device 10, just the channel 29 of device 10 and pressure plare 32 are replaced by a manual feed component 62, and this assembly 62 is applicable to the solid-state thermoplastic unit of plastic 64 that feeding one its profile such as Fig. 6 clearly show.There are in 10 the parts of same structure to adopt identical reference number number with device in the device 60 and add a tail tag " a " in the back.

Solid-state thermoplastic unit of plastic 64(Fig. 6) comprises a collection of roughly cylindrical coaxial section 66, they have consistent predetermined shaft to radial dimension (for example be respectively 0.38 centimetre with 1.5 centimetres), roughly cylindrical section 66 of this class has portion's section of rectangular cross section (being preferably square as shown in FIG.) to separate equably vertically along material piece 64 by size to being orientated similar, the diagonal form consistent size of this type of square-section and approximate the radial dimension of cylindrical portion section 66, and its bight is closely suiting the periphery of cylindrical portion section 66, and their axial dimension then is significantly smaller than the axial dimension (for example being about 0.25 centimetre) of cylindrical portion section 66.This staggered cylindricality and rectangular section 66 and 68 have formed a kind of like this material piece 64, and it has the evenly isolated projection arch portion that belongs to cylindrical portion section 66, from material piece 64 by each upper process four limits that suit circumferential surface of rectangular section 68.These outstanding arch portions have formed along the even isolated relative tooth portion of material piece 64 opposite sides, and smooth excellent face portion is arranged between adjacent tooth root, and these tooth portions of cylindrical portion section 66 or protuberance are similar to the tooth on the tooth bar, allow material piece 64 and to drive by feeding mechanism 62 collimations, the back will be described further this.Space between these ledges of cylindrical portion section 66 also holds part for the thermoplastic of fusion provides, and as mentioned previously, helps expecting the fusing of piece 64 in device 60.

Device 60 is identical with distributor 10, comprises a framework 12a that two parts are arranged; A drum 14a who is installed between these two parts of framework 12a, it has an inner melting chamber to be connected with nozzle 21a by the valve part 18a of discharging channel and by an outlet via one; And a sleeve 20a who has a cylindrical hole, this through hole that an end is installed on the cylindrical member 14a leads to an end relative with discharging channel of this melting chamber.Sleeve 20a is applicable to and holds solid-state thermoplastic unit of plastic 64 in cylindrical hole, with small matched in clearance, even the diameter of this material piece 64 is to be in going up in limited time of its tolerance, and make an end of this material piece 64 drop on then mouthful outstanding by sleeve 20a of material piece 64 in the melting chamber.Be provided with in the device 60 and be used for heating this drum is positioned at the end of wherein expecting piece 64 with fusing parts.Framework 12a comprises one handle 26a, the position at its place can make the operator catch this handle 26a with the finger of a hand, thumb with this hand pressurizes simultaneously, press this material piece 64 to enter melting chamber, force the thermoplastic of fusion to discharge melting chamber by valve part 18a and nozzle 21a by sleeve 20a.

Different is with device 10, device 60 includes feed component 62, this feed component 62 is in the end reverse with drum 14a of sleeve 20a, this feed component comprises such parts: be fit to be used for holding and keep solid-state thermoplastic unit of plastic 64 in sleeve 20a, can allow simultaneously operator's thumb that power is added on the material piece 64, press it to enter sleeve 20a, towards melting chamber.

As shown in the figure, feed component 62 comprises: (1) wall components or wall portion 74, be fixed on the framework 12a in removable mode, and they limit a passage 76, are fit to become the relation of collimation to guide solid-state thermoplastic unit of plastic with the through hole of sleeve 20a; (2) slide plate 78, it has columniform concavity upper surface 80 to be applicable to a bearing material piece 64, there is outstanding part to define a groove 82, this groove is by having an aperture to can be used to hold the end of operator's thumb on the sidepiece of slide plate and facing to its upper surface 80, because this slide plate 78 is mounted in the wall portion 74, can be along a route that roughly collimates with melting chamber, a going-back position of opening sleeve 20a from distance moves to the progressive position that more closes on sleeve 20a, turn back to its going-back position again, this groove 82 then can feed operator's thumb 83, catch handle 26a, by the operator with hand impel slide plate 78 its retreat and progressive position between move; (3) transmission component, comprise can the mode of being pivotable to be installed in the driving member 84 on the slide plate 78, it is applicable to the cylindrical portion section 64 that engages thermoplastic piece 64, and at slide plate during from its going-back position to its progressive position, to expect that piece 64 pushes melting chamber to, simultaneously when slide plate 74 when its progressive position moves to going-back position, be applicable to around this cylindrical portion section 66 and along thermoplastic piece 64 and move; And (4) comprise the parts of sprocket wheel 86, this sprocket wheel is installed in the wall portion 74 in rotating mode, be used for keeping thermoplastic piece 64 in passage 76, to collimate so that for driving member 84 engages, produce frictional force simultaneously and before its transmission part engages, remain in the passage 76 to help material piece 64.

Limit passage 76 and be used for including in the wall portion 74 of the position of through hole collimation among 64 to one of material pieces and the sleeve 20a, in them each has the 88(Fig. 8 of the relative portion of arc that reduces along its inner surface), to hold the peripheral support structure of locked part 30a and framework 12a, and on their ends adjacent, be provided with groove 90(Fig. 7 with sleeve 20a), be used for accommodating the reinforcing band of the mean level position on the framework 12a.These wall portions 79 also include interlocking horizontal end wall 92(Fig. 7 on its base on the reverse end of itself and sleeve 20a), and the relative contact top wall portion 94 of longitudinal extension, these top wall portion are kept together by a U-shaped spring metal groove 96, and this metallic channel is around fitting on the top wall portion 94 on the position that wall portion 74 is remained on around locked part 30a and framework 12a adjacent part.The arch section 88 of wall portion 74 has such inner surface, and the inner surface of they and locked part 30a defines a passage 76 that passes to the inlet of end wall 92 together.

This wall portion 74 also includes relative extending longitudinally and more separated ledges 98 on the reverse limit of itself and top wall portion 94, slide plate 78 then has the relative groove that extends longitudinally to hold these ledges 98, make this slide plate 78 can along these ledges 98 it retreat and progressive position between reciprocating.

Driving member 84 is got elongated form, there are a plurality of or three teeth 102 to be suitable for being embedded in between the cylindrical portion section 66 of the material piece 64 that goes out in abutting connection with this driving member first distal process, and be to be located in the passage 76 direct-axis in a groove of the slide plate 76 of extension, and vertically be roughly parallel to passage 76 and in abutting connection with the tooth 102 of sleeve 20a with it.This driving member 84 have one with its first end second opposed end, be installed on the slide plate 78 by a trunnion 100 that crosses passage 76, make it between following two positions, to move: (1) position of engagement (Fig. 9), the tooth 102 of this moment is engaged between the cylindrical portion section 66 of the material piece 64 in passage 76 (for this position of engagement, helical springs 104 that are between protuberance 106 and 107 are biased to a side in the driving member 84, and these two protuberances are side-prominent from the driving member 84 of passage 76 vis-a-vis and slide plate 78 respectively); And (2) release position (Figure 10), the tooth 102 of this moment is separated (for this release position with the material piece 64 in the passage 76, driving member 84 can be by tooth 102 inclined backside the cam-type motion and pivoted motion on the cylindrical portion section 64 of material piece 64, and/or bonding operation person's thumb makes protuberance 106 allow slide plate 76 towards its going-back position motion).

Also be provided with other parts, be used for power being added to when making it on the slide plate 78, limit this driving member 84 and do motion from the released position of its institute's combination around pivot towards the motion of its progressive position as the operator.By driving member 84 and the aperture that wherein is provided with trunnion 100 is an elongated shape, its orientation is parallel with passage 76, this just makes driving member 84 when its position of engagement, can along passage 76 axially and vertically between following two positions, moving with respect to slide plate 78 that it was installed in: (1) normal position, position hereto, this driving member is 104 displacements of helical spring, simultaneously it owing to make lock pin 108 and 78 on slide plate that the interval be arranged by driving member 84, thereby can rotate back into its release position (Figure 10) from this position; And (2) latched position, at this moment lock pin 108 plugs together one along slide plate 78 in the lip-deep forward lateral trench, for this latched position, driving member 84 will be revolted the displacement of spring by the power that is passed to it by slide plate 78, and will expect that piece 64 is pressed in the sleeve 20.

Sprocket wheel 86 makes thermoplastic piece 64 in the passage 76 can be exactly be meshed by the tooth of driving member 84, and produced enough frictional force material piece 64 was remained in the passage 76 before it is for driving member 84 engagement, it rotatably is installed on the pin 110, and the latter is crossed this passage and contiguous with the inlet of passage 76 on the opposite side of passage 76 and driving member 84.This sprocket wheel has a collection of tooth, their tooth top direct-axis is separated abreast to extending, be engaged between the protuberance of cylindrical portion section 66, meshing the corresponding flat surface of the intersegmental rectangular section 68 of cylindrical portion simultaneously, the tooth that these flat surfaces that touch is got be parallel to sprocket wheel 86 and the direction of axis, and also make rectangular section 68 relative corresponding flat surfaces get the direction that tooth 102 fixed and on the driving member 84 parallels thus.

When using distributor 60, the operator at first connects power supply with its power cable 47a, by its heating element heater drum 14a and baffle ring is heated.When definite slide plate 78 has been in its going-back position, an end that is about to thermoplastic piece 64 inserts the arrival end of feed component 62, this feed component is meshed along the respective side of this material piece rectangular section 68 by making the tooth on the sprocket wheel 86, and makes material piece 64 directed in passage 76.Hold handle with one then, the thumb of this hand is inserted in the groove 82 of slide plate 76, and drive slide plate 78 with this thumb, tooth 102 on the transmission component is engaged between the cylindrical portion section 66 of expecting on the piece 64, and compressing material piece 64 is towards sleeve 20a and enter the melting chamber of drum 14a, here, the end of material piece 64 will become molten state because of the inner surface that touches drum 14a.Like this, in the presence of slide plate 78 is from its going-back position towards its progressive position during motion, the power that is added on the driving member 84 will make the displacement force of driving member 84 resistance springs 104 and do longitudinal sliding motion, impel lock pin 108 to plug together translot on slide plate 78 spigot surfaces, and stop to live driving member 84 thus to its release position motion.

After slide plate has been so fully to move to its progressive position, the operator is that available hand makes slide plate 78 return and remove along the periphery of material piece 64, promptly its thumb is pushed up the protuberance 106 that closes in the groove of charging on the driving member 84 in the slide plate 78 82, such top cooperation is with making driving member 84 with respect to slide plate 76 motions, make lock pin 108 deviate from groove in the slide plate 78, driving member 84 is rotated, and the result makes and throws off engagement on the periphery of tooth 102 material piece 64 in the passage 76; After this, the operator can make tooth 102 and one of material piece 64 new portion's section engagement with its thumb, handles slide plate once more, and continuation will expect that the piece pressure pushes in sleeve 20a and the melting chamber.Preferably make tooth 102 that such forward position is arranged, they, get loose from material piece 64 to help tooth 102 into about 89 ° with respect to vertical configuration of driving member 84.

Come now wherein to have provided according to the present invention, be used for making the method and apparatus 120 of thermoplastic piece shown in Figure 6 referring to Figure 11 to 16.

As shown in the figure, device 120 includes first and second class chain member 122 and 123, and each member includes the mould 124 of a collection of bulk again.Each mould 124(Figure 15 and 16) have parallel end face 125, the side of end face 125 form right angles or positive 126 therewith, and one by its front 126 and the elongated mold cavities 128 that is positioned at central authorities of end face 125 openings.The shape of die cavity 128, be equivalent to along one by the material axis of piece 64 and its each rectangular section 68 two-phase across corner the plane separated half.Mould 124 in first class chain member 122 be to link together by the rounded pivot plate 130 in a collection of side so that its end face 125 is close mutually, but these pivot plates then is connected on the mould 124 by the mode that has rotator bolt 131 with pivoted motion; And the mould 124 in second class chain member 123, then be that pivot plate 132 with the side semicircular in shape closely connects together its end face 125 mutually, but these pivot plates then are with there being rotator bolt 133 to be connected on the mould 124 in the mode that makes it pivoted motion.These pivot plates 132 have semicircular recess 134 in front 126 adjacent sides of itself and mould 124, the part that can hold circular pivot plate 130, and allow the adjacent mould 124 between class chain member 122 and 123 longitudinally to align in face 126 and face 126 relative modes, with contacting of the die cavity 128 that between the front 126 of mould 124, collimates, and the end face 125 that makes adjacent mould 124 is along each class chain member, 122 contact with the end of die cavity 128 with 123, and the opening of this die cavity has passed through the end face 125 at 124 alignings of adjacent mould.

These two class chain members 122 and 123 are configured in sprocket wheel respectively between 135,136 and 137,138, and center on betwixt and extension, each member can rotate around a vertical shaft, and each is to sprocket wheel 135,136 and the 137, the 138th, and is separated, the adjacent segment that their residing positions can make class chain structure 122 and 123 is moved along part of path 139 always, contact with positive 126 and make mould 124 do front 126, and do supporting (Fig. 4) slidably by a bearing 148 along their lower surface.Along above-mentioned straight line highway section 139, mould 124 will be held in by two row rollers 140 front 126 is contacted with positive 126, and this two row roller is then separated 126 facing surfaces positive with it that engaging mould 124.Sprocket wheel 135,136,137 and 138 has semicircular breach 141, its shape can be held the circular portion of pivot plate 130 or 132 closely, so that both helped to keep class chain member 122 and 123 synchronous, and help to drive this kind chain member 122 and 123 by a roller chain 142, sprocket wheel 143,144,145 and 146 and one gear reduction drive disk assembly 147, as shown in Figure 11.Sprocket wheel 135 and 137 is separated, and with roller 140(Figure 12) straight line highway section 139 arrival ends determined separate, make the front 126 of mould 124 between sprocket wheel 135 and 137 gap, separate (for example about 2.5 centimetres), mould 124 is then between the periphery and straightway part 139 of sprocket wheel 135 and 137, along generally being parallel but the convergence highway section motion of one section short distance (for example about 18 centimetres) being arranged; And sprocket wheel 136 and 138 also is separated, and separately with the port of export in straight line highway section 139, make mould 124 along one parallel substantially but the highway section of dispersing of one section short distance (for example about 30 centimetres) is arranged, from the above-mentioned port of export and to sprocket wheel 136 and 138(Figure 13) periphery on the front 126 of mould 124 separate (for example separating 3.8 centimetres) motion mutually.This just allows pivot plate 130 and 132 to move with suitable aligned relationship, must be on the direction of the face 126 that is approximately perpendicular to mould 124 from the groove 134 making plate 130 and plate 132, plate 130 and 132 along straight line highway section 139 involutory before or after, owing to the result for roller 140 contact engages or throws off, if have the material piece enter or walk out sprocket wheel 135,137 and 136,138 peripheries go up positive 126 with positive 126 contact positions, this joint or disengagement be do not allow incident; And allow mould 124 to be approximately perpendicular on positive 126 the direction and can to separate fully one, be able to mould 124 begin from mutually around sprocket wheel 136 and 138 when leaving, make of die cavity 128 disengagements of the ledge of cylindrical portion section 66 in the material piece 64 of the firm shaping of clinging from mould 124.

The polymerization material of fusion is by the material source of an elongated pipe 150 from an extruding machine (not showing bright) class, in the die cavity of the mould 124 in the positive 126 pairs of fronts 126 of input, straight line highway section 139, this pipe 150 has foursquare periphery, in its size and the directed die cavity that be able to fit between mould 124 parts, these parts can make thermoplastic piece 64 be formed with section 68(Figure 14 of portion of square cross section).The thermoplastic of fusion moves along straight line highway section 139 along with mould 124 and cools off and curing, and the thermoplastic piece of continuous mould pressing moulding when mould 124 separately the time from discharging therebetween, and can push in the device 160 shown in Figure 17,18 and 19 through a conduit 153, the material piece that the bonding progressive die is pressed into is cut into predetermined length.

With reference now to Figure 17 to 19,, wherein provided method and apparatus 160 of the present invention, they are to be used for the thermoplastic piece 64 that device 120 progressive dies that make are pressed into is cut into predetermined length.

As shown in the figure, device 160 comprises first and second class chain member 162 and 163, and each member comprises the supporting member 164 of a collection of bulk.Each supporting member 164 has end face 165, side between these end faces 165 or face 166, and one elongated and be positioned at the semi-cylindrical recesses 167 of central authorities, and opening is applicable to and holds material piece 64 half by the face 166 and end face 165 of supporting member.Supporting member 164 in first class chain member is by the rounded pivot plate 170 of sidepiece, make its end face 165 in abutting connection with and link together, these pivot plates are then by there being rotator bolt 171 to be connected on the supporting member 164 in the mode that can pivot; And the supporting member 164 in second class chain member 163, then the pivot plate 172 by the sidepiece semicircular in shape makes its end face 165 in abutting connection with linking together, and these pivot plates are by there being rotator bolt 172 to be connected on the supporting member 164.Pivot plate 172 has semicircular groove 174 on the adjacent side of the face 166 of itself and supporting member 164, the part that can hold circular pivot plate 170, allow class chain member 162 and 163 adjacent supports 164 to do vertical the aligning simultaneously, contact with groove 167 at 164 collimations of supporting member in face 160 and face 160 relative modes.

The member 162 of these two class chains and 163 with around with the form of extending, be configured in sprocket wheel respectively between 175,176 and 177,178, every pair of sprocket wheel 175,176 and 177,178 is separated and be placed in certain position, allow be in sprocket wheel, move facing to the mode of face 160 contacts with face 160 to class chain member 162 between 175,176 and 177,178 and 163 adjacent segment.Sprocket wheel 175,176,177 and 178 has semicircular breach 180, their shape can be included the circular portion of pivot plate 170 or 172 closely in, both helped to keep class chain member 162 and 163 synchronous, help to drive class chain member 162 and 163 again, make the rotation that two sprocket wheels 175,177 or 176,178 be in transmission connection (not the showing bright) that driven by drive disk assembly 147 produce, can transmission class chain member 162 and 163 make and to install 120 class chain member 122 and 123 synchronous.Like this, sprocket wheel has just been created condition to 175,176 and 177,178, make each class chain member 162 and 163 can be around an independently distance motion, and a part that makes class chain member faces toward the relation of face 166 with face 166, distance along one section cut-off, from the sprocket wheel 175 of the position that is in the material piece 64 that to include device 120 in and the initial point of 177 cut-off distance sections, between the terminal point of discharging material piece spare 64 places that cut off on sprocket wheel 175 and 177 the cut-off distance sections, move.

A collection of blade 182 is housed on the supporting member 164 of first class chain member 162, between the edge guidance 183 that is fixed on these supporting members, be used in supporting member 164, from the disconnection portion section of going-back position to an extend through groove 174 that separates mutually with groove 174, get the direction of this groove 174 of crosscut and move along aforementioned cut-off route segment.

Also have such parts: be used for making blade 182 from its going-back position along this cut-off highway section to its position of engagement be cut into the parts of predetermined length so that will expect piece 64; And be used for making blade 182 to turn back to the parts of its going-back position on the stretch line that the cut-off route segment is separated mutually therewith.Supporting member 164 on second class chain member 163 is to be installed in roller 185 on the frame unit 186 by a collection of in rotating mode, and they are bearing in their limit portions relative with corresponding recesses 174.A circular cam 188 is installed, this cam is around a parallel and separated axle motion with its axis, and drive it by one parts (not showing bright) and move along an eccentric distance, make it can be at blade 182 along this cut-off highway section during through this cam 188, gnaw to it from its going-back position and to engage and to push down each piece blade 182 when closing the position.In the presence of class chain member 162 and 163 separately around sprocket wheel 176 and 178 o'clock, above-mentioned motion will be cutting off from the material piece 64 of discharging between these two members, move around sprocket wheel 176 and cut the supporting member 164 that blade 182 is arranged, when these supporting members 164 move on first class chain member 162 and that part of distance that aforementioned cut-off highway section separates mutually, will under gravity effect, make blade 182 turn back to its going-back position.Can be as required from some supporting member 164 removal blade 182, to be cut into the material piece 64 of different predetermined lengths.

Above, the simple embodiment that the present invention has contrasted it is described.Should be realized that,, can under not departing from the scope of the present invention, make many changes described embodiment for the people who is familiar with this technology.Like this, scope of the present invention will should not be limited to the structure described in this application, and can only by claims and etc. the described structure defined of language in the value document.For example, under the prerequisite of some flexibilities of loss, can make the thermoplastic piece that is applicable in apparatus of the present invention only have evenly spaced apart and relative class sillar shape arch tooth on two offsides, then be parallel flat surface between adjacent tooth root.

Claims (4)

1, is suitable for use in one and distributes a kind of feed component (62) on the device (10) of fusion thermoplastic from solid-state thermoplastic unit of plastic (64), described device (10) comprises a framework (12a), and the handle (26a) that suitably is positioned on this framework can make the operator hold this handle (26a) with the finger of an one hand; Comprise that a drum (14a) that is installed on the said frame (12a) has an interior melting chamber that is communicated with an outlet by a nozzle (21a); Comprise a sleeve (20a) that a through hole is arranged, the above-mentioned drum (14a) that is fixed to one end of this through hole goes up and an end opposite with above-mentioned outlet with said melting chamber communicates, this kind sleeve (20a) is suitable for and holds solid-state thermoplastic unit of plastic (64), and an end that makes this material piece (64) is in this melting chamber and make material piece (64) outstanding by sleeve (20a); Also comprise and be used for heating the parts that above-mentioned drum (14a) makes the material piece end fusing in the sleeve (20a); Described feed component (62) comprises wall components (74), be applicable at the end place opposite of sleeve (20a) and attach on the framework (12a) with above-mentioned melting chamber, and limiting a passage (76), the through hole that can be used to alignment sleeve (20a) is to guide solid-state thermoplastic unit of plastic (64); Feed component (62) is characterised in that it is suitable for adopting a kind of solid-state thermoplastic unit of plastic (64), this material piece (64) has suitable its axially evenly to separate and the coaxial portion's section (66) that roughly is dome-shaped on its opposite flank, and each one is intersegmental the space, also comprise a slide plate (78), it has a upper surface (80) that is fit to be used for a bearing material piece (64), and be mounted on the aforesaid frame (12a), be used for roughly moving with the path of melting chamber collimation along one, from one with the progressive position of the separated going-back position of sleeve (20a) up to a more contiguous sleeve (20a), and then turn back to above-mentioned going-back position; Comprise the drive disk assembly (84) that carries by this slide plate (78), can be used to connect above-mentioned dome-shaped portion section (66), and when retreating to progressive position thereafter, push thermoplastic piece (64) to melting chamber at slide plate (76), also can when advancing to going-back position, it move at this slide plate (78) around dome-shaped portion section (66) and along thermoplastic piece (64); Comprise thermoplastic piece (64) collimation that makes in the passage (76) so that the parts that connect by above-mentioned drive disk assembly (84); Also have the parts of giving prominence to according to the direction that is approximately perpendicular to this upper surface (80) from a side of the aforementioned relatively upper surface of slide plate (78) (80), it comprises first protuberance (78) adjacent with sleeve (20a) and leaves this first protuberance (78) and second protuberance (107) of the opposite side of sleeve (20), between this first and second protuberance (78 and 107), define a groove (82), be fit to insert an end of holding operator's thumb of above-mentioned handle (26a), borrow manually to make above-mentioned slide plate (78) towards above-mentioned progressive position with towards above-mentioned going-back position motion.

2, according to a kind of feed component (62) of claim 1, the parts of wherein addressing that are used to collimate comprise and are provided with separated tooth to be engaged between described dome-shaped portion's section (66), this sprocket wheel (86) is installed on the aforesaid wall parts (74) of above-mentioned passage (76) and the opposite side of said drive disk assembly (84), is used for rotating around an axis by crosscut passage (76) configuration.

3, a kind of feed component (62) according to claim 1, the drive disk assembly of wherein addressing comprises: an elongated driving member (84), the latter has a collection of tooth (102) that is applicable between the dome-shaped portion section (66) that is engaged on material piece (64), these teeth (102) from then on first distal process of the contiguous driving member of a side (84) of driving member (84) rise, the orientation of this driving member (84) on slide plate (78) is, make it vertically be roughly parallel to the tooth (102) of passage (76) and contiguous sleeve (20a), have simultaneously one relative with aforementioned first end and be installed in the second end on the slide plate (78), they are used for making driving member (84) to move at following two position spaced winding pivots with respect to slide plate (78), one is the position of engagement, the tooth (102) of this moment is engaged between the dome-shaped portion section (66) of material piece (64) in the passage (76), one is release position, the tooth (102) of this moment separates mutually with the material piece (64) in the passage (76), be used for making aforementioned driving member between a normal position and a latched position, to move simultaneously with respect to slide plate (78), and when this driving member (84) during in above-mentioned normal position, tooth (102) can be further from sleeve (78) for the same position of slide plate (78); Be suitable for being bonded on the such parts between slide plate (78) and the driving member (84), be used for stoping (84) pivoted motion of this driving member during in above-mentioned latched position and leave the above-mentioned position of engagement when driving member (84), and, be used for promoting this driving member (84) to move to described release position from the above-mentioned position of engagement when this driving member (84) when being in said normal position; And the spring (104) between slide plate (78) and driving member (84), be used for driving member (84) is displaced to above-mentioned engagement and normal position, said driving member (84) has the protuberance (106) in the aforementioned grooves of advancing by leaps and bounds (82), the latter can catch with hand, when this slide plate (78) owing to when shifting aforementioned the sort of going-back position onto, just driving member (84) can be rotated to above-mentioned release position.

4, according to a kind of feed component (62) of claim 3, wherein said tooth (102) has the surface of cam-type on its side relative with sleeve (78), when being adapted at by hand slide plate (78),, driving member (84) drives around the tooth (102) of the dome-shaped portion section (66) of material piece (64) in the mode of camming movement by being turned to said release position from its progressive position towards position motion thereafter.

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