BE630632A - - Google Patents

Description

       

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  He Process and China for the manufacture of * ereux object.



   This invention relates to a method and a machine for the manufacture of a hollow object by an operation of making plastic by heating a material having the shape of a sheet or a tube and causing it to expand. in a mold * there is already a method of the type in question, according to which a cold tubular piece of plastic material is placed in an open mule in two parts, then is heated by a current of hot air.

   So that this tubular part is heated uniformly, it * and turned over * by means of a clamp, this process is cases slow since it takes a fair amount of time to heat a tubular part to the sufficient degree
In recent years, therefore, another process has been employed, according to which the plastic material is extruded all through a flexible hose which is surrounded.

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 of a thread and that we wet when it is still hot,

   After a certain temple when the plastic * loft hardens $ the mule is opened and the hollow part is foul, after which a new section of fat casing is placed in the mold * the so on. However, a number of cla difficulty * are inherent in the known process CAr it is impossible to correctly adjust the plasticity of the materials This is the reason why it was necessary to give up 8 Xa manufacture of aartaina object:

  * we start from ca <'6 * iM <material, in particular polyvinyl chloride which, however, constitutes a very favorable material for many 4pplto4- tîtitimo wcrtkili 411mitd un #UiMvhe! tihtoitit due object # uu plebe # to A * #! taitte liquids * Also * # it nti. and not pu1bll, in many cases, with the pfoa4- das used so far $ to obtain a <<uyt * MA la liver perfectly lît4o and beautiful presentation, since it is already difficult, with the known process, to make the bottles. transparent and limpid a plane material tiqua bound * 18 pvtn <4ill autinub 1 t utrudut \ * and "1r ,, vL" '"by means of a dittpttit CQlI1purt; ant; a horizontal tube on which is placed a head making a certain angle, which euputidant pre.ente an inclination # which forms a gut 1rr'Rul1ftf.

   The regulatory defect can be badly icy due to the currents. of air coming from the ventilation of Ilateliur in which one proceeds to the work * Finally, because of the operation dfaxtru ni op., the po "o1r coming from the raw plastic material spreads you in the workshop and can deposit you on the casing to be molded * you drank the invention is to r4ik a perfectiouné process p8rM8attant to completely or partially obviate the drawbacks exposed above. The characteristic origin of this process is that the theinaopitotiquo material have been removed from the machine to molding by a feed mechanism, the operation of which is synchronized with the opening and closing of the mold. In this way, a very fast working flow can be obtained, In addition,

   it is possible to obtain a better manufactured product than by the known methods because it is easy to make articles. particularly suitable for the operation da heating and da <Mul * 8 <), for example calibrated casings comprising a particularly understated external face Overall, this process has various advantages which will easily be pp) r <citw
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 a technician

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 As workpieces, it is advantageous to use sections of hoses assembled between supports Individuals of the transport tateaniaeM * these parts form flexible pipes can be easily assembled to the weight and thickness of exactly << tr <* t and which allows obtaining a uniform object * by mutage and $ yes:

  It is advantageous from plastic casings having such properties that, when heated, their cross section takes on a substantially circular shape, and such flat casings are camomudar in terms of storage and notch. Harbor. They are, in addition, easy to manufacture, for example, one extruded casings of round straight section, which one flattens when they are at a temperature such that latent tensions are formed in the care of the material during its aplstteea. is lying. We can advantageously start from flattened or coiled gut * as from ropes, which makes them particularly easy to store and: transport, This gut can be advantageously more or less heated before being d6v1d4 ..

   This
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 heating is of particular importance in the case of a relatively
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 rigid like polyvinyl chloride. It is advantageous to use flattened casings folded over themselves at equal intervals and spaced so as to form
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 flattened corrugations with i80 'elbows, this arrangement allowing equal. ##> - easy storage and transport. It is possible to provide notches * at the folds, the parts being connected to each other only by narrow parts that are
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 #it easy to break, possibly 8 cold, The mold can be moved avrnGaeuramanr entered two positions in one of which it is closed around a place in execution c # r amen ', by the mech *.

    nor transport urn near which they brought the formed state to the other position in which it does not 8.n. not the arrival of the following part: * Thus, the transport mechanism: can be constructed in a relatively flat way, for example by providing for the feeding of the pīcI 'To the machine Mine a horizontal path .
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  The chauffas. parts in cost of u4cution psuk advantageous84I1r. (! nt 0 <:! r <; * o * ur6 by means of hot air, It is .1RMi that a heater. r4sul1er of the LAC .. to tor - aec can be obtained 8kra, if we d4dre. even from the int61 ': 1eut of pieces tubulott-ce This plaçât can avankagsuaament be <:!' * Mport: 4tt in vertical position and marc: 't form by o < 'sion says retained * plaeds & their partît * upiriaWx *.

   From cotte bzz IN

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 head, each piece can pull heated aaaea strongt0 nc aana undergo deformations facheuaea to the * self of the plaatifieation and aana adhere to the organs of china in a harmful way * From * pieces pierced $ through and through can be trwnaportdaa advantageously through a space traversed by * current.

   vertical hot air - * By doing so, a part of this hot air passes through the workpieces by heating them from the inside. * The invention also relates to a machine for the mine by covering the product.
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 which has just been indicated and whose characteristic resides in the fact that it comprises a divine mold *, an opening and closing device of and mule, a transport mechanism used to transport the parts to be molded through a apparatus linked to heating, a dicpoticil or crew to advance the parts being executed in turn between the parts of the mold, finally a system for subjecting to the blowing a part placed in the closed mold ** Thanks to such a machine, we can achieve fast and catiafaixaate production.

   The conveyor mechanism advantageously comprises a fine conveyor belt provided with members for supporting the work pieces. This produces a machine that is both simple and good in operation. To give the heating period a sufficiently long duration, it is possible to move the conveyor belt in a curved path,
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 for example following ripples.

   lateral or vertical or even h4Ucotda1ement from top to bottom
The mold can advantageously be mounted so as to be able to move between two positions * under the action of a drive mechanism, so that, in a first position in which it is open, it surrounds a soft part. -
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 lorg to oc then reform around it, after which it * and brought to the second position in which it does not lead to the arrival of the next room. Thunderstorm at this point, a specially practical construction is made as described above.

   The mold is preferably mobile in the vertical sound system This direction of movement is
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 is avdrde particularly advantageous * Will 1 mold can au..1, instead of being moved as it has just been said, 9trt movable in another way, for example because it is subjected there to a pivoting Around d 'an ex * hortaontal or vertical, The transport mechanism has a great advantage i wait through a space in which a current of hot air is blown. This results in regular heating

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 Particularly favorable for parts to be formed.

   This stream of dry air before all directed vertically, so that the heat can be distributed evenly throughout the length of the vertically suspended pieces In addition, the mechanis * transporter can $ Cr studied to advance the pieces of lagoon dis- continues 09 to maintain each * of them for a short period of time At the place where folds are: saint * plr 1. moulos We obtain the certainty that it parts indeed occupy the Correct Position * when the mold closes, which avoided everything:

   lack of regularity and any waste, the conveyor mechanism advantageously comprises a circuit path
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 formed for the separate conveyor elements, the relative distance between 01..1.- Mnee along the path in question being able to be adjustable, these conveyor elements having at least one member for holding a piece, the conveyor elements can advantageously ! at least in one heating sector, be very close together
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 one of the Others,

   while they are individually transferred from the heating sector to the place where the mold is formed by a comparative movement. ne: long w '<< f <tcttt- tant suffered in the path in question * From this In this way, the parts are close to each other during the transfer and the crossing of the heating sector, the dimensions of which can thus be reduced * The relatively long movement being carried out discontinuously has the consequence that the sooty part im-
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 immediately the molded part is held., while the mold is closing,

   some distance from and) last
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 The plastic material can advantageously be fed continuously. tr.- to a heating device, for example in the can of a continuous strip of plastic fiber * In this way, it is possible in many cases to work at a rapid rate and obtain products of uniform quality .



   The plastic material can be subjected to variable heating in the
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 longitudinal direction, This makes it possible to subject the part which is called for to particularly intense heating. , form the shell of a flask or a * bottle and which must be welded while the rent of the piece is less heated, so that one obtains% favorable molding and welding conditions.

   It is also possible to vary the degree of heating along the right section of the hose, for example such that an eeTC <tinw x8n <

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 of the room is heated with a particular intensity, in particular in the c <x where this xôno must receive a printed text or must carry another object welded to * It ** The plastic material t Advantage to be moved or supplied * at a speed variable, for example in the case of a. continuous plastic band.

   Thus, it is P04m eble in some aar to obtain adequate heating of different parts of the plastic material and furthermore, the movements can; torus <in '! i taoIittr, ta \ l1IIIt.fho plastic ma presenting all turtle bed of a. band peub, Uf plus 1er "'plA" Gaa advantageously discontinuously the length of each step corresponding to the part which must be 1'1: pick in the mold This is 11, in many cases, the most fntag way .u .., implement (the above-mentioned process, given
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 that it is unnecessary to move the whole mold as it would otherwise be
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 necessary) or normal working regime.

   In addition, heating can be carried out in this manner under particularly favorable conditions. The plastic material in the form of a strip can be provided from an extrusion device to a bait. heating * This results in regular and rapid production. This plastic material It having, as it has just been said, the entire shape of a strip, can, after the extrusion operation, pass through a <f <tfMidi <"<n <tt6 and calibration apparatus * On thus obtains a much more uniform coverage than by the usual feeding mode, when it passes directly from the extruder device to the mold.

   The plastic web can be driven from an extrusion device running in a clockwise direction: have: ale; it is directed * by guide members to an inlet port mèul1B6 at the top of a heater, in which the plastic material travels a vertical path in a similar extrusion device. in which the press * operates in a horizontal direction, it is possible to support-
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 effectively remove the shaped strip by pressing.

   it is then possible to shape
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 by pressing the strip at high temperature * therefore in a state of considerable plasticity.
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 table, after which the strip is cooled on its way to the
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 heating, for example by means of an apparatus 4v calibrating ^ so wrong * that ultimately a material is obtained having the desired good regularity for the tubes obtained by extrusion $ for example the garden hoses of * J.d1n. , The flexible hose does not need to be cooled to room temperature at the

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 upstream of the heater * not on the contrary, it is advantageous in annoying rogla that it is cooled only to such an extent that it roof. table and putast withstand '1' "deformation no passage To the heater,

   of such a pie that the interior ptuftia still has a relatively i <v <! N temperature.
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 The heater can be fed from the stored plastic material.
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 under the band gold; This pt4..nt. in many cases of considerable advantage, 'given that it is then easy to change the quality or color of the material * By 4illettro # the mine carrying out the process as it has just said, is suitable: gone ... only for relatively low series * products, which is very expensive and not feasible with the * known * method, for example. t4glait work and
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 from where.

    at the necessary point,
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 The two appended figures * represent the real achievements of the machine according to the invention * Figure 1 and a front view of a machine constitute a first description of the invention. some organtu are removed for clarity from 4 * 84 ± n, ta fia, 2 is a perspective view of some partita of the IaltchÍtHI 'constituting another embodiment of the invention, ligu 3 has a top plan view of parts of this me- oh1n ..



  The lily. 4 is a view if% cut by the line IV-IV of the figure 3t La fis, 5 * and a section view * as much: in evidence the transport path
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 as well as the conveyor elements of the machine,
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 The ti .. 6 is a top plan view of a conveyor element. The end 7 is a side elevational view Job6matLl1u, of a machine constituting a third embodiment of the invanciout The machine shown in figt 1 comprises a apparatus for the 8ùufflasc of vials of known type, provided with a lower Met 1 and guide columns 2 and: 3 directed from bottom to top and serving to support a table 4 which can 1st lowered and raised by means of cylinder. A fluid pressure us.

   On this table 4 feels mono th mob1hll \ enc the two elements 3 and 6 of the mold which can be moved UcrLeou- sement to be brought closer and away * from each other by * cylinder * 7 and 8

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 in which must a fluid yes pr..1on. In addition, 4.nI table 4.between their elements of 101.11., A vertical blowing nozzle 9 that can reach high and low #Yes the action of cylinders (non-espimentdo) in which acts do xttmt
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 a fluid at all pressure *
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 Above the device for blowing the flasks, which preferably constitutes a separate, independent assembly; from the rest of the thing, He finds a MnitOtt transporter consisting essentially of titi * chttnw o '* M end which, all 10 * ctîon of a chatn wheel.

   (non-r4prdaentit) can move along a path comprising a vertical part - 10, a horizontal part * ttb of the horizontal parts 12, 13, 14, 15 * '* tending lat'r.hl1wmt, a part inclines K, an inclined part 17 and a horizontal part * 18 reLUe '& Ilextedmit4 lower of the vertical path 106 The chain carries from distance to distance of the retaining members that can $ Cr * constitute by short bïochtf conical oe by two or three spikes. able to come from the inside against the conical pin.

   These retaining members are mounted rotatably on the wall mocks the chain under conditions such that their axis of
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 roof rotation perpendicular to the chain plane *
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 In the vertical path 10 are provided guide members such as * a guide a form of cooperating rod:

   with an arm integral with the retaining members * rotAtU't so that # au (anointed in the inf6rf.lur. part of and path it is maintained in position, so that the axis of the conical spindle shows on one side , A part at the mine of the chain 10-18 is housed in a safe (tton '') f <p!? T) nm6 <)
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 through which a vertical air current is admitted, for example an air current
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 directed upwards laterally to the path 10 is a hopper 19 which comprises (as rio presentat) two side cot6â oc two other this'. obuverao4nte otiont "obliquely from top to bottom have - & - say towards a narrow lower orifice whose longitudinal edges are formed by the sides mentioned last, The distance separating the two <; 0t:

  6th pAral1.1t .., t somewhat greater than 14 length of * pieces, so that a large number of these pieces * can be found in hopper 19, their longitudinal direction * tftant perpendicular to the parallel sides * L The lower hole has dimensions such that one pitc at a time draws * the cross * tn-de'RoUN from the lower hole finds me a mechanisna with capable organa

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 to receive a blank and drive it in a longitudinal direction towards path 10.

   The drive mechanism of these organs or elements and that of chain drive 10-18 are synchronized so that $ 'arrives from a
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 part at path 10 produced when a group of retainers is found. the place in question of this path 10. the retaining * and holding members can be guided in such a way, that the crampons. so it was spoken would be ruled out * in this:

   point of the conical stud 4 # so that the end of a tubular workpiece can be brought into engagement with this stud, near which the studs are clamped 11 press against 14 outer side of the workpiece, e 't''t * 'dir * to bring it back towards the stud, This result can be obtained for example by means of the springs of satianaemant of the crampons The transfer prganeo then disposed below the hopper 19 which are brought back so as to receive the next part z left from the hopper and So on *
When the restraining organs * carried by the endless chain pass from
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 vertical path 10 to horizontal path ii, the tube sections * to be shaped pivoting their own weight to the vertical position.

   (as shown) and maintain this position as they travel along the path 12, 13, 14, z, 16, The 14 ctmttnt * drive mechanism and designed so that the movement is discontinuously tired and is adjusted to way * stop when the part has reached the lowest position between the two paths 16 and 17.

   The movement of the blowing mechanism is synchronized with that of the chain 10-18 so that the mold 5-6 is opened in its upper position by the lifting movement of the
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 table 4 au = ment where the part * 4 presents, then the mold closes around this part, a pressurized fluid then entering the cylinder. 7 and 8.

   Immediately * ready, binder is blown through the nozzle into the room trapped in the
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 mold * This piece inflates I take the shape of the mold during which takes place the do d.Mcent movement of table 4 to allow the placement of the next piece between the two paths inclines $ 16 and 17.

   When the flask now formed in the mold
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 the aloitvre mold is sufficiently hardened and: the bottle is ejected then the table 4 is raised to receive the next part and the reCOI188RC cycle .. the movement of the chain 10-18 is adjusted according to the time required
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 to hardening, de facto that this time is, practically, the only factor which detracts "

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 initiated the $ * production speed. by passage through the boot including:

   it was mentioned above (which. is not Pite represented on the (figure), the * parts are cheul- Max by 14 brooding vertical hot air So that the parts can be wrongly heated from the inside the cdniqua stud retentive organs placed on the cat 10-18 can be oral, so that some of this air can rise through the tubular pieces while continuing 84 toue * 4 through the 8o '. heat can:

   be transferred 1 la 6f <Mi <19 so that the pieces are reheated in advance * The chain 10-18 can, if necessary, be entered. continuously at a relatively smooth rate ... 'Outefoh, this requires more precise synchronization of the various biles as the mold has to reform around a part while it is moving and piles up. must continue to and move worm * lot organs
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 restraint during the movement in question *
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 The retaining members * are preferably removable and interchangeable and can be mounted in variable places of the chain so as to allow, on the one hand, to modify the irtrtasasnk of the raw parts% ttt on the other hand to shape
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 parts of different diameter.

   The speed of progression of the chain must therefore
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 <6U <t * M <(m <! Be variable In addition, the temperature of the heating glue * must be able to Ctto modified * The construction must also be able to be studied so that
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 the parts are heated over a greater or shorter total distance *, adjusted according to the thickness and the required temperature of the material in question. The heating box must itself be insulated and provision can be made around
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 from it ducts * for air circulation. Equipped with heating elements.

   The nozzle do
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 blow-off can be in the highest position when the table is raised,
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 then lowered when the mold opens, and raised again immediately afterwards Ella can also remain in her lower position while moving the table, to move quickly from low to high in order to enter the eu * bular room after lifting of the mold This can reduce to a minimum the time required for the engagement of the blow pipe in the workpiece. It * and also possible to study the machine so that the mold is not raised and lowered. 6.

   the parts being moved between or elawantr of the mule for example by a vertical or oblique mauve * The parts can then be brought from the chain to the noula he helped him with special retainer #, 4rtanting a part to the law t the deviation of and *

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 side of the chain, for example in a vertical direction so that the blow stopper can possibly lift it up to engage with the lower end of the part, after which the latter is lowered towards the ghoul.



  It was also possible to design a constructive embodiment comparing a band or conveyor belt provided with a certain number of tightened mandrel.
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 vant of retaining members of tubular parts and designed to function as
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 blow-off stop, because they are for example placed in communication with a pipe
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 compressed air supply, when they reach the mold * Such mandrels can
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 wind also be arranged so that they are directed upwards or downwards out of the active distance of the belt or belt emnopotteutat If it is a matidrtli
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 blowing directed green downwards, the removal of the vials will, in these conditions., be
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 particularly convenient after opening the mold,

   The transporter mechanism can be studied in such a way as to be different from the one shown. This is how the tr.n8o band or belt. all * can not move in vertical paths * instead of 4o move ..Ion the path * horizontal represented * This transport mechanism can also 4tr Mnett- killed by a rotating round table Leu parts can, 41 desired, acre support of both ends during transport, for example by an undrin at one end and by crampons at the other end * Instead of the heated box, it was possible to use or provide a channel enveloping the path of the movement of the parts. parts can dtrs arranged in order to allow individual movement in guide members, especially with the help of roller * r $ * movable beds in xlieeid- king,

   to which. lot of pieces can be brought in very close together # during heating, and moved individually until they find themselves between the mold elements * If I use the chain, it is possible that the Ili-
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 your find on either side of the latter or, where applicable, that two or
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 several group @ holding members are placed on either side, to which cau it is necessary to provide a corresponding number of molds. the $ next to the others on the
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 table 4.
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  If desired *, it is also possible to transfer the parts one pro one from a store to the mold, for example using a beautiful rotary or

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 of a similar transfer mechanism when the magazine does not have a dummy transporter tttec'mi'uxe but is constituted for example by a hopper such as 06110 which is designated by 19.

   In the same way, the store can be heated * The transfer mechanism can also be designed so that it maintains each * of the parts for a certain time in a heating device * Thanks to this arrangement * we have the possibility, the if necessary, to heat certain * parts of the room * differently during the blowing process, one can use hot air, and also use a heated mold.

   In the same way this%, it is possible to use
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 rooms completely cold or only slightly heated. advance, dtr such that, notwithstanding the thinness of the objects, they have a considerable rigidity when they are introduced into the mold * if desired, the mold can be moved? of tell * dead that the monk on a * part of no path he follows a part in the transport mechanism * A
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 such a case, it will not be necessary that the supply or all * with a gadfly '* vein discontinuously * A similar movement of the moult can also be obtained by placing it on a rotating table, for example,

   around either a horizontal axis or a vertical axis.
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  Instead of parts submitted only to extrusion, it is also possible to bend injection molded parts or produced parts. Of any other suitable material *
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 It will often be particularly advantageous to employ flattened tubular pieces as the raw material, since this will facilitate the agarittaga and transport. In the machine shown *, however, it is advantageous that the tubular pieces are in principle erectable. round straight line * However :, the same return can be obtained by providing tubular pieces endowed with intivieuo xaa o latent tensions. When such tubular pieces are placed in hopper 19 and are heated in the same manner, they straighten out on their own to provide a nearly round cross section.



   Instead of using a hopper 19 and a transfer mechanism retension:
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 between this hopper and the conveyor chain, the operator can attach the hand Here tubular pieces to the conveyor cliafn, which allows him to obtain a haulm * Hut)) t''f (HUiH:

   l'lllu j1 \} 'de tu ctturtra, A awt, 41 & .u'd, IL ..11. purCfq9ilidtu4rutt wV, l4rdrux

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 of OMPIOY * r a conveyor mechanism to which are attached the two ends of tubular * pi4atu for example one end on a Coupling mandrel and the other ex- trdtatfcé (both the holding clamps, the machina shown1 * in lines 2 & <relative a possible softness of the object of the invention comprises an apparatus for blowing flasks or bottles * àanibl4bbi to that shown in figure 1 LI. party .. eotMtpondtn '' your apparatus are therefore indicated by the same reference numbers ranging from do ta 90 However, ut apparatus comprises two mules dicp0) t << side by side As well as two bunar do soufflas * aaaoei4a 9A and 9B.



  The machine is in addition to a heating and transport device comprising an endless horizontal path formed by a groove rail 20 and ocuperating two arcs. Setni-oiroulalres 1, 22 and two connecting paths rectilinear 23, 24 * Dan. 1 <groove of the rail are mounted a number of conveyor elements 25 provided with end parts, rounded * 26 and 27 and a narrow aencrale part 20, The lower side is provided with sliding rib 29 and 30 resting against the bottom of rail 20.

   In the $ sides of the rounded end portions 26 and 27 bones are found due to balls 31, 32, 33 and 34 making & 4illie partially and subjected to the load of pressure springs 35 $ On the top of the carrier element is fixed a hole 36 provided at both ends with a holding mechanism (non-roprdienti)
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 one end of a flexible hose projecting downwards and consisting of a
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 thermocplaatic material. Each conveyor element is also provided at its upper part * with a support member (not presentd) cooperating with a na- weiit input arm 37 which is driven by a rotation at constant speed, the vertical axis of this rotational movement coinciding with the vertical axis passing through the center of the denti-circle
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 21 formed by the rail.

   This support member mounts on the element (carrier and this
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 arms must be designed in order to be able to be disengaged from each other when the conveyor element and finds in the middle of the arc 21 of the rail.
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 Elsewhere be provided so that the conveyor element is accurately maintained
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 in the position in question, for example a pin capable of being driven * with the dimension of the conveyor element * The sides of the rail are provided with grooves 38 darns which the balls 31- 34 are engaged and guide, ..

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  L14ra 22 of the rail and los junction paths 23 and 24 have wrapped in. a çal '$ u plate 39 which, by means of a vertical partition * 406 is divided into a co., .'- tlulC <l \ t "Kt" "It' and an internal compartment, The upper edge of this partition 40 at the found 141 \ h'el \\ have in-dembous of the upper fund of the eainse 39 and the lower edge that lies slightly above the lower bottom of this act. of heating elements 41 as well as a fan 42 driven by an electric motor 43 * At the two places where the rail 20 protrudes out of the side 39, no clamping 0! '8 <"" are found serving as a tatuple a 'shutter..

   The qaisse e is provided in addition to an orifice of adjustable toteiw 44 dis * pmn? - 1 # <such aorta that it has erupted. from the shutters in question a the 86re aapîratione This body 39 is provided at the point of transition between Veto 21 of the rail and the junction path 24 with a derocheunt 45 forming a loading station for
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 plastic rinses.
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  When the machine * represented by FIG. 2 to 6, a piece of tubular material is placed on each end of each of the crossbars 36. This operation can be done by hand or by hand. always set the height of the step 45 * The 'l6Ment. carriers are provided in such number that they fill the jammed rail 20 with the exception of i> 90 * represented by the arc 21 of the rail, that is to say from the path 23 to the middle of this arc 21.

   The arm 37 rotating quickly ... constant, entuatitis, at each turn. a carrier element of
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 then the end of the path 23 to the middle of the arc 21 where this element pushes all
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 the other elements of a notch or not forward on the rail * In order to reduce the speed of r: iv6c d4o pieces for a given flow, we can; provide two or more. arm 37.

   The disengagement of the arm 37 from the conveyor member may occur as a result of the lifting of the arm in the middle of the arc 21 away from the member support member. The arm may be held in your raised position while it crosses the transport elements on the 900 represented by the arc It starts from the middle of this one, one goes up the rrxjet 24, La chine 1-9 do oouillàco des'% * cane and studied so that the blowing stops $ 9A and es are located vertically *.

   on * 'dw * <! u <' of the retaining members of the cross member of a conveyor sling which has * located in the central position or? Rail Arc 21 * Immediately After 11916cent transporter was <M'n <'has this petition, the * nozzles 9A and 9b fitted in don # both hoses, bitch

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 las moulaw are larwtdir around and * deroiara, After which air is blown into these guts and table 4 as well as the moulai are lowered. Holds out that the vials yes ** as it has just been said are cooled. to harden them, the next conveyor food is <H! Mn <in the middle of the arc 21. The mules are opened, the bottles are released at the table is raised * to shape the following pair of spinning tubes *.



  In the fiS. 7, 51 ddaigae a device or member of extrusion comprising a horizontal arm 52 'extending from a * head 53 by which is extruded continuously and with a constant speed a flexible tube 4 consisting of a synthetic tube thermoplastic such as polyvinyl chloride or polythyls
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 This valve tube passes through a cooling apparatus placed near the extrusion Cati 33b. This cooling apparatus is preferably designed to constitute in maximum time a calibration apparatus like this * and moreover normal. )
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 in the production of spindle hoses * for gardening or 4hortlcút \. or the like. From the cooling apparatus 53, the pipe 54 is driven through guide rollers 56Â, 56B to a hole;

    at practice 57, put. path * obliquely goes up to cross a track 58 and then back down between and last and a drive roller 59.



  Beyond this, the tube zur is entered vertically from top to bottom 1 tTD 'bzz a' PPlr.11 of heating 60 presenting a vertical channel passing through it from side to side, in which peacock * this aouple tube. Around this channel, the cliauta6c apparatus
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 60 may have a certain number of lamps. or member * heating by royonnument, uniformly distributed preferably and heating the inside of the mass ,, te ion, - from the lower edge of this heater <10 .t'to1 \ d a knife driven by a cylinder 61 operating under the action of a fluid pressurizes us * Au-dououou of this.
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 heating apparatus 60 is arranged in known manner the blowing apparatus
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 vials, similar to the one shown in t1'h 1.



  During the operation of the machine shown in fis * 7, the casing 54 * and, as indicated in the above, continuously extruded At a constant speed * It therefore arrives cooled and calibrated, i.e. with a * structure
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 perfectly regular, to the heater 60. Cooling and said, -
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 tance separating the cooling apparatus 55 from the apparatus 60 being able to be <'<u <féh so that, when it arrives at the latter, the hose is relatively cold at!' # <-

 <Desc / Clms Page number 16>

 
 EMI16.1
 terituy, still very warm mat inside, for example he.

    the temperature allowing z its internal parts * to undergo a damage * transformation notably a considerable stretching, this temperature being however notably lower than the extrusion temperature and lower than the temperature t which the extrusion oc produces with the proc4d4. of flask tufflagt known hitherto, in which there is a direct transfer of the extruded material * vota le roula.



    In this heater 60 it is mainly these external parts of the hose which are heated.



   The machine works in the following way * i The table 4 and the open mule 5-6, mounted raised, after which the mold reformed around the hose which hangs down
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 in * deooouo of the heating apparatus The dry sectioning <Hteuf <by the knife driven by the cylinder 61 operating by the action of a pressurized fluid.



  The operation of blowing the section of hose which is in the mold is then carried out by the blowing nozzle 9 which protrudes vertically to enter the mold, This nozzle 9 also forms the molding core of the neck.
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 or goumijt of the flask, At the same time, the table 4 and the mold 3-6 are lowered * by minimizing the space necessary for the continuation of the movement 4 'lowering;

   of the casing 34. when the Caçotmé flask in the 3w6 mold by the rcrutage operation is durai ,, the mule olouvro, the flask is unmolded then the table is again teulavae, This series of operations is adjusted according to the speed of movement of the hose, under conditions such as% adapted to the lifting of the sand, the mold can close immediately around a new section of hose,
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 The results were described.

   and shown as well as Ion proisA dice which have just been indicated are only non-limiting examples of the posai * bUit611 of implementation of the invention which lends itself to d1vetiOl vaxiankos, This is how it is possible # without Another trick is to have the hose which comes out of the refrigeration apparatus 55 be sent to accumulation sorpentins ensuring a certain 'R4sin.Re, the hose being able alternatively, at a suitable moment, to pass through the apparatus. heating for 60 years in the direction of the blowing device for the flasks or bottles itself, 11 is also possible, of course,
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 4'acliotor the hose and pass it through the heater.

   When par- rails stored objects are employed, it is probably advantageous not to *

 <Desc / Clms Page number 17>

 sar the hose in a long esser heater before inserting it into a heater where it undergoes intensive short-term heating. During a preliminary heating, the casing can be heated in the whole of its thickness to a temperature close to the limits of plasticity,
It is also possible to work with a material in the form of a strip having another profile, for example the profile of a rlban,

   in which case a grinding operation must also be carried out in the mold. Such an operation can moreover be made easier by studying the heater so that it is capable of heating the zones in question in a particularly intense manner. It is also possible to pass the hose through the heater with a discontinuous movement.

   When, as can be seen from FIG. 7. the flexible tube is provided by an extrusion device, it is convenient, to achieve such a discontinuous movement between the extrusion device and the heater, to insert nubile guide rollers * C It is thus, for example, that the rollers 58 and:

     59 can be movable vertically depending on the extrusion speed, so that for a certain lapse of time they move up and down at a relatively slow speed, so that the hose is kept stationary in the heater and that during another part of the time lapa in question, it is moved up and down at a relatively fast rate.



     Cries * to these provisions, they do not deny the need to raise and lower the table at the same time as the mold or to make other movements to the mold to move it away from the region immediately below. or. heater 60.

   During such a discontinuous movement, it * and moreover easy to ensure a differentiated heating according to the longitudinal direction of the hose, so that an adaptation can be carried out according to the molding and welding conditions prevailing in the various places or adjust the mold. It is also possible to ensure the cutting of the casing at a time other than that indicated in connection with fig. 7 This is how the hose can be pulled cut before being brought to the heater, which makes it possible to heat this snorkel internally.

   Such sections of hose can be moved sideways to be amended to the location of the heater from which they must

 <Desc / Clms Page number 18>

 
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 @tyo places in the mold, Orlca a and cutting, it is possible to vary considerably, z in many respects, the methods of execution of the process and the details of the realization of the apparatus, 04 which presents equal great advantages. * Finally.

   16 cutting performed before the introduction of the part into the heating apparatus - of course obliges to provide special holding members of # Obauchto
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 subject * to heating,
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 The models of execution of the process and the details of realization of the apparatus can be modified in various ways, anu 'to depart from the invention in the field of the etiu, the technical enott ** K S U M g.



  A.- Method of manufacturing hollow objects according to which a thermo-material having all the shape of a plate or a tube is rendered pla.t1- that by heat and undergoes an expansion in a mold , characterized in that this thermoplantic material is fine at a molding machine by means of an atynehronized feeding aéoaitisme with the opening and closing device of the Mold.



  Bo- Modes of carrying out this process, having the following features, considered separately or collectively: 16- The thermoplastic material is heated in the feed mechanism.
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 yours;
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 2 * - we use I plastic in the form of a sectioned bar 3rd- each section is transported separately in the food arfeaniame
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 hold by means of a holding member;
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 4, - the thernapi as tic tubular material used is present. Or. the form
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 of a flattened blank;
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 5.- this tubular aatifcrt It presenting all this cast
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 flattens possessed such properties that, under the action of heating, it takes
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 a f0! 'm <t <entible <Mnc circular in cross section;

   6, - the flattened casings of material th¯rMOpla.t1.ut present in the form of a coil which is unwound. Is worth to be transferred to the china of <Mul <$ * t 7.- these casings of material th.l. '\. tOp1A.ttqu..have heated while they are
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 folded or entoulds cam a rope;

 <Desc / Clms Page number 19>

 
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 dt- the * casings of thtMtopiMCic material all folded., over $ meses at intervals. equal and expaatr, so 1 to form # flattened waves # avaa of * soda He t SU "9 << ',, mule is moved entered two positions in one of which he and feroe around 4 # the folds brought by a cranoportaur mechanism, after which it is brought t ltlittat closes A I another position in which it does not interfere with the arrival of the piece before the 10t "the heating * and partially or n6iira Mint to the taayan of current. 'hot air.



  Ut "the * 'P4 \ lchu separated are moved to your vertical position * and are mintsoute by daa organa placed their upper parteg t2t" the blanks present an orifice through them right through out as long as: antratnder it through a space traversed by costing : * hot air.



  13 * - the thermoplastic raotlèr out routed continuously through usa
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 heating appliance;
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 14 * - this thermoplastic material is wP'11d11.11 i1 variable heating in the longitudinal direction Pa; 13, - this hermopl..t1qu matter. progrraraa b a true vicespei 16; this thermoplastic fiber progresses diocontinuously, the Ion, Sweat of each advancement being equal to that of the blank which must be introduced.
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 in the mule;
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 17.- the thermoplastic material is fed from an extruder device to a heater; 18, after passing 1 dlextruct1rn device. the band of iaatldra thermoplA.tigu8 through * a cooling and calibrating device 19.

    the strip of thermoplastic material is entrained from an extrusion slide with a horizontal nettle, by guide members, up to an inlet orifice provided at the upper part of a heating device comprising a vertical path of citemineaumt of the material thlrmopla.t1qu.



  The strip of thermoplastic material 'la'1n .. has sent to the ap-
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 same heaters

 <Desc / Clms Page number 20>

 c- Machin. for the milk in industrial work of the process according to A or B. characterized in that it comprises a divided mule, an opening device and
 EMI20.1
 closing of ae moultt a driving carrier odconlbnw;

   the blanks an matitr. thermoplastic h through a heater, of * members advancing the blanks * one by one between the elements of the mule, gear a $ y <cèaK) d * # or {(l gt of each part placed in the mold fero4o De- k4a1hation. peculiar to cnte machina, cAr.cthtd.1 en and that the conveyor mechanism comprises a bAnd. or belt eMMpo) f'6 <u <t endless equipped with diorg4nes for holding or retaining * dbduclioo do piceni 2 * - the mussel is mobile between two btace Positions at a ç & ni'N8 dien- tratnemnt # of such aorta that. in one position, it wraps the Ab <uchf of the part while it * and open, for its remake ** then on .111..pr.

   what it is) na <t ", nd up to the other position where it does not interfere with the ar1'lv4e of the piew wuiMtx 3 * 'the mold can be d <eUc4 in the vOftical direction" 4 .- the m6c.ni.mo conveyor is provided in advance with support members intended to retain one end of the parts so that they hang perpendicularly below it;
5.- the transporter mechanism extends into a space through which * and blew a current of air. hot.



   6.- this air current is directed vertically; 7.- 'the conveyor mechanism is arranged so as to advance the pieces in a discontinuous fashion, in order to keep each piece laying a short lapa
 EMI20.2
 from time to time the place where the mold is ordered and does not close around the pî4co;

   8.- the transport mechanism comprises an endless path for the separate transport ildml% tu, the relative distance of the latter being able to be modified, at the mine a retaining member * being provided for each part;

     
9.- the conveying filaments are, at least in a heating sector Se) very close to each other, while they are transferred individually-
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 ment, from the heating sector, to the place where the mussel closes thanks to a tracking movement: not relatively slow 10, - this path is IQul1bhnlent: Ilorixontal,