DE102017114687A1 - A method of making a temples with a core, the temples of temples made in an additive manufacturing process such as Selective Laser Sintering (SLS) and eyeglass temples made illustrated - Google Patents

Abstract

The invention relates to a method for producing temple pieces with a core, such as metal or plastic core, wherein the blank of the individual eyeglass temple in an additive manufacturing process, such. Selective laser sintering (SLS) is made using a plastic suitable for this purpose ("printed"). During the manufacturing process (printing process), an elongated channel along the longitudinal axis of the bracket is molded (printed) along the longitudinal axis of the bracket within the frame blank, wherein the channel of the frame blank is open at one of its ends and thus has a channel inlet opening. Then - after blowing out or sucking or rinsing out loose powder from the channel - the soul is introduced into the channel of the stirrup blank.

Description

Technical area:

The invention relates to a method for producing temple pieces with a core, wherein the blanks of the individual temple pieces are used in an additive manufacturing process, such as, for example, manufacturing. Selective laser sintering (SLS, "printing" or "plotting") using a plastic suitable for this purpose as a production substrate, according to the preamble of claim 1.

State of the art:

By the DE 201010001101 is a method for producing laser-sintered plastic articles - it is known here by the printing of a plastic article by the selective laser sintering (SLS) - known, wherein one carries out the following steps: a) smoothing the surfaces of the plastic objects; b) washing the smoothed plastic articles; c) dyeing the plastic articles; and d) sealing and / or impregnating the surfaces of the plastic articles. The plastic article was by laser sintering of polyamide or polystyrene or glass ball or carbon fiber filled polyamide, polyamide 11 , Polyamide 12 , Polystyrene, polypropylene or mixtures thereof. Such laser-sintered plastic articles are preferably components of a spectacle frame, piece of jewelery, lampshade or writing instrument.

Disadvantages of the prior art:

Conventional eyeglass temples are usually made of acetate; wherein in the blank of the bracket, a metal core (soul) is injected. For this, the acetate is usually heated. Acetate is easily deformable even at low temperatures; it quickly gets a texture like clay or dough. Therefore, it is ideal for shooting a metal wire and therefore for the production of eyeglass temples. After the metal core has been shot in, the blank - now a bracket with a metal core - is further processed, for example, by processing such as contour milling and cutting to length. Examples are in the release of MYKITA dated 30.09.2013: Making of a MYKITA Acetate frame (See Mykita youtube movie https://www.youtube.com/watch?v=EsaGckBC8k0, minute 0:23) and in the Published by Essequadro on 08.09.2014: Eyewear handmade in Italy, Essequadro-youtube https: //www.youtube.com/watch? V = dwCYMiaHWic, minute 0:49.

The arrangement of a soul - such as metal core, preferably in the form of a metal wire - in a temple has significant advantages. The metal core or metal wire inside the bracket allows easier adjustment of the bracket to the customer's head. To adjust, the material of the strap - usually acetate or a similar material in behavior - heated, so that the material of the strap can bend and threatens not to break. If the material of the temple is not warmed up, it threatens to be brittle and break, especially with age. When heating and deforming the material of the temple, the soul assumes the static stability. Thus, a metal wire as a soul in the interior of the bracket can easily bring in the desired shape and thus of course the material of the bracket. The soft material of the temple has barely static properties in this state. Only after cooling, the material hardens again and remains in the desired shape. Without the metal wire, it would be much harder to achieve the desired deformation. The material would have to be softened and kept in the desired shape until it solidifies. This is not really possible in practice because you have to heat and cool the iron several times to get the shape you want.

Previous Temples, which have been created in an additive manufacturing process ("printing process") have no soul, neither in the form of a metal core nor a wire. The plotted temples can be adapted to different minds of customers only to a limited extent, as the practice has shown. If glasses made of a material such as polyamide of additively manufactured glasses, including the brackets, do not fit right the first time, the customer should be advised of a different model. The melting point of polyamide PA12 is 180 ° C - the softening point is only a few degrees Celsius below - and is thus much higher than that of acetate (melting point at about 119 ° C). However, even at about 85 ° C acetate loses its silky shine, which can not be recovered even after cooling. If you were to bring the made of polyamide according to a SLS method bracket to a temperature in which it could be easily deformed, the optician would literally burn your fingers. However, as described above, due to the missing metal core, the bracket would have to be held in position until it has cooled and solidified again. That would only go with suitable, heat-shielding gloves. Furthermore, there is a risk of blistering on the surface of the polyamide, if it is too hot. These bubbles are impossible to remove and thus the ironing board would be rejected.

Furthermore, the insertion of a metal core into an additively manufactured eyeglass temple can not take place as accurately as is the case with a temple made of, for example, acetate. In the case of the SLS process, a powder is present in advance, which during of the manufacturing process to a three-dimensional object - here a temples - is melted by the laser. The strap is thus already in its final form after the printing process. Although it is further refined by Trowalisieren and dyeing, however, a further mechanical processing, such as milling, usually does not take place.

It is thus not possible to introduce in the SLS process a metal core, soul, in advance - ie before or during the production process of the blank - in the growing blank of the eyeglass temple. As stated above, the subsequent introduction of a metal core or wire in the plastic of the bracket is considerably more difficult. If you were to einschießen the soul later there is a risk that the same exits the side of the temple wall, since the temple thickness varies as such over the length of the bow. In addition, the material - for example, polyamide in the SLS process - is tougher than acetate even when heated, which would make the insertion of a metal wire considerably more difficult. In addition, an injected soul would bulge the material of the polyamide strap outwards and thus change the thickness of the bracket. This can be seen on the surface of the bracket and is optically not desirable. If you would make the temple itself very thick, so this effect of the change in thickness of the temple might no longer be seen. However, the clip would then be less flexible enough to fit the customer's head.

Drilling a channel into the temple after its manufacture according to the SLS process for the insertion of a soul is not reasonably practicable in practice. The wires for insertion into a temples have a thickness between 1 and 2 millimeters and a length of several centimeters, to about 14cm. When drilling such a hole, such a long and thin drill would be in danger of breaking. In addition, one could not guarantee in this case with certainty that the drill runs centered in the bracket. The risk of the drill emerging laterally from the wall of the stirrup would be too great.

Technical task:

The invention has for its object to provide a manufacturing method and an eyeglass temple produced in this way, in which a temple, which is produced as a blank according to a SLS manufacturing process, can then be provided with a soul.

Technical solution of the task:

1. a) der Kanal an dem dem Ohr abgewandten Ende des Bügelrohlings offenbleibend eingeformt wird mit einem Verschluss des Kanals am entgegengesetzten Ende des Bügelrohlings oder
2. b) der Kanal an dem dem Ohr zugewandten Ende offenbleibend eingeformt wird mit einem Verschluss am entgegengesetzten Ende des Bügelrohlings oder
3. c) der Kanal an beiden Enden offenbleibend eingeformt wird oder
4. d) der Kanal an beiden Enden mittels je eines Verschlusses verschlossen bleibend aus dem Herstellungssubstrat eingeformt wird und
5. e) anschließend in den gemäß einem der Merkmale a) oder b) oder c) hergestellten Kanal entweder durch dessen vorderes oder hinteres Ende die Seele in den Kanal eingebracht wird oder
6. f) bei einem gemäß Merkmal d) hergestellten Kanal wenigstens einer der Verschlüsse entfernt wird und danach die Seele in den Kanal entweder von dem dem Ohr abgewandten oder von dem dem Ohr benachbarten Ende des Bügelrohlings durch eine der Kanalöffnungen in den Kanal eingebracht wird.

In a method of manufacturing temple glasses with a core, such as a metal core, the blanks of the individual temple clips are fabricated in an additive manufacturing process, such as Selective Laser Sintering (SLS, "Printing") using a suitable plastic as a manufacturing substrate ("Printed"), the solution to the problem is
that during the manufacturing process (printing process) of the stirrup blank within the same an elongated channel along the longitudinal axis of the stirrup blank is molded (printed), either

1. a) the channel at the end facing away from the ear of the stirrup blank is formed open with a closure of the channel at the opposite end of the stirrup blank or
2. b) the channel is formed open at the end facing the ear, with a closure at the opposite end of the stirrup blank or
3. c) the channel is formed open at both ends or
4. d) the channel is closed at both ends by means of a closure permanently formed from the manufacturing substrate and molded
5. e) subsequently in the channel produced according to one of the features a) or b) or c), the core is introduced into the channel either through its front or rear end or
6. f) is removed in a channel according to feature d) produced at least one of the closures and then the soul is introduced into the channel either from the ear facing away from the ear or the end of the stirrup blank through one of the channel openings in the channel.

Advantageously, thus in the manufacturing process of the eyeglass temple according to an additive method in the blank of the eyeglass temple a channel for the subsequent inclusion of a soul in the temple, molded with, mitgedruckt to thereafter - after the production of the spectacle blank - the subsequent insertion of the soul in to realize the stirrup blank.

Further embodiments of the invention are characterized in the subclaims, namely:

After printing the stirrup blank, at least one of the stoppers is removed from the channel produced according to one of the features a) or b) or c) or d), and thereafter, by means of compressed air from the channel inside the same loose powder to the outside through the at least blown out a channel opening and then introduced the soul through one of the channel openings in the channel.

Or, after printing the stirrup blank, at least one of the stoppers is removed from the channel produced according to one of the features a) or b) or c) or d), and thereafter removed by vacuum (suction air) from the channel inside the same loose powder through the sucked off at least one channel opening and then introduced the soul through one of the channel openings in the channel.

Or, after printing the stirrup blank, at least one of the stoppers is removed from the channel made according to one of the features a) or b) or c) or d), and thereafter, by means of a liquid (pressurized liquid), outwardly from the channel inside the loose powder flushed out the at least one channel opening and then introduced the soul through one of the channel openings in the channel.

The pressurization of the channel by means of compressed air or by means of negative pressure or by means of a pressure fluid for blowing out or sucking or flushing the channel of powder residues is carried out with a device which generates either compressed air, such as by compressed air gun, or negative pressure or a pressure fluid.

Furthermore, a blow cannula or suction cannula for air or for a liquid is placed on the compressed air or underpressure or a pressure fluid generating device whose outer diameter ( r ) is less than the clear width ( s ) of the channel, wherein the compressed air or the pressure fluid is introduced through the cannula into the channel or the suction air is sucked through the cannula from the channel.

Advantageously, a flexible cannula is used as the blowing or suction or pressure fluid cannula, which follows the curvature of the channel during its insertion into the channel of the stirrup blank and during the blow-out or suction or rinsing process.

For one of the problems within a channel of the stirrup blank during its production lies in the fact that after the stirrup blank has been printed, the channel introduced into it is filled with loose powder. However, since the channel only has a clear diameter of 1 to 2 millimeters, but can be several inches long - up to 14cm in length - the powder does not come out of the channel by itself; even firm tapping is not enough to remove the loose powder. One possibility would be to drill out the channel with a drill, which as such would have to be flexible. This works to a limited extent, but the use of a drill is not reasonable, as the powder would easily fuse with the resulting heat and then not be removed properly and completely. In addition, the channel would have to be configured as straight as possible so that the drill does not run the risk of escaping through the wall of the eyeglass temple to the outside. Such a hanger would be reject, because you could not hide the breach of the temple. Advantageously, thus, the fastest and safest way to remove from the channel, the loose powder by blowing the channel by means of compressed air or by suction of the air (vacuum).

Indeed, it would not be sufficient to blow out or suck out or flush out the duct with a conventional compressed air gun connected to a device generating compressed air, or suction gun or liquid gun. As a result, only a few millimeters of the channel would be blown free or freely sucked or washed free. In order to make the channel residue-free, a bladder cannula is connected to the air pressure gun or placed on this in an advantageous manner. The cannula can be easily introduced into the channel through the channel inlet opening under flowing air pressure; the loose powder is blown outwards. Thus, the channel is free after the discharge of residues and the soul can be used. The same applies to the extraction of air from the channel or the flushing of the same. Again, the cannula can be introduced to the air suction in the channel and the loose powder are sucked off.

Furthermore, as a blowing or suction cannula or hydraulic fluid generating cannula advantageously a flexible cannula is used, which follows the curvature of the channel during its insertion into the channel of the stirrup blank and during the blow or suction or Ausschwemmvorgangs. The great advantage of blowing out or expelling the channel of loose powder with a flexible cannula is that the cannula can never escape from the channel through the wall of the clip blank. Thus, eyeglass temples can also be realized with a channel in which the temples blank is heavily pre-bent already in the production process (plotting or printing), thus equally also the respective channel located therein. With a drill, no matter how flexible it would be designed, a highly curved channel would never be drilled out. There is no problem with such a flexible cannula to blow out the powder residues or suck or flush out. So that the soul when shooting into the channel of the curvature of the same is able to safely follow without leaving the side of the wall of the stirrup blank, It is advisable to sharpen the soul at its insertion end and during its insertion, such as shooting, to rotate about its own longitudinal axis. The soul is, of course, only after the passage of the channel of the stirrup blank of remaining loose powder introduced into the same, for example shot.

For complete completion of the temple, it is known that parts of glasses, including the temple, several finishing processes, such as the Trowalisieren, the dyeing and infiltration, subjected. It makes sense to perform all finishing steps of the blank before inserting the soul into it. The surface of the blanks is directly after production (SLS process such as plotting or printing), often open-pored and thus prone to contamination. Such contamination would later remain visible, or you would have to clean the bracket again before further processes. Thus, it makes sense to refine the parts only and use the soul as the last step. However, it would be detrimental to a dyeing process if loose powder would get out of the channel into the dyeing plant. If the stirrup blank has an open channel, there is a risk that this could happen.

Therefore, in a further embodiment of the invention in stirrups, which have been prepared according to one of the features a) or b) or c) and which are to be subjected to a dyeing process, the at least one channel opening is closed before dyeing and only after dyeing is at least one the closures are removed, then the liberating (blowing, sucking, flushing) of the channel of loose powder and then the soul is inserted into the channel.

In a further embodiment of the invention is at U-blanks that have been prepared according to the feature d) and are then subjected to a dyeing process, removed only after dyeing at least one of the closures, then the liberating of the channel of loose powder and then the soul inserted into the channel. The advantage of this procedure according to the invention is that due to the closed channel, on the one hand, no powder can emerge during dyeing and, on the other hand, that no dyeing of the channel, that is the interior of the stirrup blank, takes place, which may be desirable for specific applications. Thus, advantageously, the loose powder is trapped within the channel and can not spill at any time.

After dyeing, the closure of the channel at its end or the seals of the channel at its ends are removed, for example drilled out. Thereafter, the loose powder within the channel can be removed as described above.

In the normal case of the advantageous implementation of the invention will be after the production of the stirrup blank with a channel the same blow loose powder or suck or swell, so that the blow-out or suction or Ausschwemmvorgang can also be performed by the Plott-Dienstleister. Thus, the channel is advantageously free of loose powder and can subsequently be dyed without the powder exiting the channel. However, in this case, the dyeing liquid can also enter the channel. If the interior of the channel is not to be colored, the channel opening or the channel openings must be closed with a plug before the dyeing process.

Preferably, the beginning of the channel is located at the end remote from the ear of the frame blank at the end in the region of a hinge receptacle of the bracket for receiving a part of the spectacle joint. There, the channel inlet opening is placed on the front side. Thus, it is ensured that later after the onset of the soul - in this case from the end of the earpiece remote from the ear - from the channel nothing more can be seen.

In a further embodiment of the invention, the channel at its rear, the ear-facing end of the stirrup blank, a hole, channel opening, through which the remaining powder is removed to the outside during the blow-out or suction or Ausschwemmvorgangs. The channel may be continuous, but it does not have to be continuous. Subsequently, the soul is introduced into the channel of the stirrup blank. An open channel opening can advantageously be closed with a plastic plug. Advantageously, thus, the channel immediately after the production of the stirrup blank continuously, so be open at both ends, wherein after the introduction of the soul in the stirrup through the front, the ear remote end, the channel inlet opening, the rear, the ear adjacent end of Channel, the channel outlet, can be closed with a stopper. Of course, the stirrup blank can also be subjected to a dyeing process in a known manner with at least one or both ends of the closed channel.

In an advantageous further embodiment of the method according to the invention, the end of the core with which it is to be introduced into the channel, previously sharpened and the soul is helically rotated during its introduction into the channel about its own longitudinal axis.

Furthermore, the beginning of the channel of the stirrup blank is advantageously arranged on the end face of the stirrup blank facing away from the ear or parallel to its end face. In an advantageous further embodiment of the method according to the invention can be used as a soul for introduction into the channel instead of a metal core, a plastic core. The use of plastic cores as the soul of a spectacle arm may be advantageous for specific applications. Advantageously, a plastic core is used in such a case, which consists of a hard and unbreakable material.

Temples according to the invention with a core, such as plastic or metal core, preferably metal wire, wherein the temples blank in an additive manufacturing process, such. Selective laser sintering (SLS), made of a plastic suitable for this purpose ("printed"), is characterized in its production by one of the aforementioned manufacturing methods.

• 1a eine Ansicht eines geraden Bügelrohlings,
• 1b einen Schnitt durch den Bügelrohling gemäß 1a längs der Schnittlinie A-A zur Darstellung eines Kanals innerhalb des Bügelrohlings, wobei diese gestrichelte Linie gleichzeitig die Längsachse des Rohlings sowie des Kanals darstellt,
• 2a eine Ansicht eines gekrümmten Bügelrohlings,
• 2b einen Schnitt durch den Bügelrohling gemäß 2a längs der Schnittlinie C-C zur Darstellung eines Kanals innerhalb des Bügelrohlings, wobei diese gestrichelte Linie gleichzeitig die Längsachse des Rohlings sowie des Kanals darstellt,
• 3a eine Ansicht eines weiteren, leicht gekrümmten Bügelrohlings,
• 3b einen Schnitt durch den Bügelrohling gemäß 3a längs der Schnittlinie D-D zur Darstellung eines beidendig geschlossenen Kanals innerhalb des Bügelrohlings, wobei die gestrichelte Linie D-D gleichzeitig die Längsachse des Bügelrohlings sowie des Kanals darstellt,
• 4a eine Ansicht eines weiteren, leicht gekrümmten Bügelrohlings, der an seinem dem Ohr zugewandten Ende verschlossen ist, wobei vor dem dem Ohr abgewandten Ende eine mittels Druckluft gespeiste Blaskanüle zum Ausblasen des Kanals angeordnet ist,
• 4b einen Schnitt durch den Bügelrohling gemäß 4a längs der Schnittlinie D-D, wobei die gestrichelte Linie ebenfalls gleichzeitig die Längsachse des Bügelrohlings sowie des Kanals darstellt und vor dem dem Ohr abgewandten Ende des Bügelrohlings die mittels Druckluft gespeiste Blaskanüle vor der Öffnung des Kanals sich befindet,
• 5a bis 5c eine vereinfachte Darstellung einer Blaskanüle in verschiedenen Stellungen in Bezug auf einen von losem Pulver auszublasenden Kanal eines Bügelrohlings,
• 6a bis 6b eine Ansicht eines weiteren, leicht gekrümmten Bügelrohlings und einen Schnitt durch denselben längs der Linie D-D, die gleichzeitig die Längsachse eines Kanals ist, wobei in beiden Figuren eine Seele vor dem dem Ohr benachbarten offenen Ende des von losem Pulver befreiten Kanals angeordnet ist zum Einschießen in den Kanal,
• 6c die in den 5a und b dargestellte Seele nunmehr in eingeschobenem Zustand in den Kanal des Bügelrohlings von dem dem Ohr benachbarten Ende des Kanals aus,
• 7a bis 7c eine vereinfachte Darstellung einer Saugkanüle in verschiedenen Stellungen in Bezug auf einen von losem Pulver auszusaugenden Kanal eines Bügelrohlings und
• 8a bis 8c eine vereinfachte Darstellung einer Kanüle mit einer Druckflüssigkeit in verschiedenen Stellungen der Kanüle in Bezug auf einen von losem Pulver auszuschwemmenden Kanal eines Bügelrohlings.

Short name of the drawing, in which show:

• 1a a view of a straight stirrup blank,
• 1b a section through the bracket blank according to 1a along the section line AA to represent a channel within the stirrup blank, this dashed line is simultaneously the longitudinal axis of the blank and the channel,
• 2a a view of a curved stirrup blank,
• 2 B a section through the bracket blank according to 2a along the section line CC to represent a channel within the frame blank, this dashed line being simultaneously the longitudinal axis of the blank and the channel,
• 3a a view of another, slightly curved stirrup blank,
• 3b a section through the bracket blank according to 3a along the section line DD for displaying a channel closed at both ends within the frame blank, wherein the dashed line DD represents simultaneously the longitudinal axis of the frame blank as well as the channel,
• 4a a view of another, slightly curved stirrup blank, which is closed at its end facing the ear, wherein in front of the end facing away from the ear is arranged by means of compressed air-driven blast nozzle for blowing out the channel,
• 4b a section through the bracket blank according to 4a along the section line DD, wherein the dashed line also simultaneously represents the longitudinal axis of the frame blank and of the channel and in front of the end facing away from the ear of the frame blank is the compressed air-fed blast nozzle before the opening of the channel,
• 5a to 5c 2 shows a simplified illustration of a blowing cannula in various positions with respect to a channel of a frame blank to be blown off loose powder;
• 6a to 6b a view of a further, slightly curved stirrup blank and a section through the same along the line DD, which is also the longitudinal axis of a channel, in both figures, a soul is arranged in front of the ear adjacent the open end of the liberated from loose powder channel for shooting into the channel,
• 6c in the 5a and b now shown in the inserted state into the channel of the stirrup blank from the end of the channel adjacent to the ear,
• 7a to 7c a simplified representation of a suction cannula in various positions with respect to a suction of loose powder channel of a stirrup blank and
• 8a to 8c a simplified representation of a cannula with a pressure fluid in different positions of the cannula with respect to a auszuschwemmenden of loose powder channel of a stirrup blank.

Technical solutions of the invention:

The 1a and 1b each show a view of a straight strap blank 1 . 1a , and a cut, 1b , along the line AA in 1a through the stirrup blank after its manufacture in an additive manufacturing process such as Selective Laser Sintering (SLS) and after removal from a printer (not shown). Longitudinal through the stirrup blank 1 , preferably along its longitudinal axis 6 , a canal runs 2 through the temple blank 1 , this channel 2 in the manufacturing process of the stirrup blank 1 has been successively produced with. According to the 3a and 3b goes to the end of the strap blank facing away from the ear of a customer 1 from its end face 19 a receiving opening 3 for a hinge part of a joint (not shown) to be inserted into the bracket. Inside this reception opening 3 there is an entrance opening 4 of the canal 2 , so that the same is also set back the front side of the frame blank 1 located. As shown, the channel 2 at its rear, the ear of a customer facing the end by means of a closure 5 or 12 ( 3b ) closed, leaving the channel 2 an elongated blind hole is. The closure 5 . 12 can in the production of the Ironing blank 1 be made integral with the same; but the closure can also be subsequently added as plug in an open channel.

The 2a and 2 B each show a view of a curved frame blank 7 . 2a , and a cut, 2 B , through the strap blank 7 according to 2a along the section line CC, this dashed line 6 at the same time also the longitudinal axis 6 of the strap blank 7 represents. The strap blank 7 is - as in the 1a and 1b - from a channel 18 traversed, which along the longitudinal axis 6 of the strap blank 7 extends. Again, the stirrup blank 7 at its end applied to the customer's ear, a receiving opening 3 ( 3b ) have to be arranged in the bracket hinge part of a joint. The channel 18 begins with a channel opening 4 where both the same and the channel opening 4 frontally with respect to the stirrup blank 7 are arranged. The channel 18 points to the ear facing the end of the frame blank 7 an opening 22 on; the channel 18 runs continuously through the bar stock 7 ,

The 3a and 3b each show a view of a slightly curved stirrup blank 9 similar to that of the 2a and 2 B is designed. In contrast, here is a channel 10 inside the strap blank 9 at both ends by means of closures 11 . 12 locked. This is in the channel 10 included loose powder from the manufacturing. This allows the stirrup blank 11 before inserting a soul into the canal 10 now be subjected to different processing steps, without that in the channel 10 produced powder can escape to the outside. To remove the powder in the channel 10 and subsequently inserting a soul into the same then one of the closures 11 . 12 open.

The 4a and 4b each show a view of a stirrup blank 13 , as such, according to that of 1a and b, 2a and b, 3a and b are configured similarly. A channel 14 inside the strap blank 13 has a closure at its end adjacent to the ear 8th on. In front of the face 19 of the strap blank 13 there is a blow cannula 16 to illustrate the beginning of the blowing process by means of compressed air.

The blow-out process of the channel 14 of the strap blank 13 by means of compressed air from the bladder 16 is in principle in the 5a . 5b and 5c shown. The outer diameter r the bladder cannula is smaller than the clear inside diameter s of the canal 14 , so that for the two diameters: r <s. The bladder cannula 16 will be in front of one of the openings of the canal 14 placed. The compressed air starts the loose powder 21 from the channel 14 blow. The blow cannula moves 16 according to the 5b and 5c further and further into the canal 14 one. The flowing back compressed air keeps the blowpipe 16 approximately in suspension, leaving the powder loose or detached from a compaction in the channel 21 on retracted blowpipe 16 is discharged with the back-flowing compressed air.

The 6a and 6b each show a view of another, slightly curved stirrup blank 17 and a section ( 6b ) Through the same along the line DD, which at the same time the longitudinal axis 6 a channel 18 is, each one soul 20 in front of the open end adjacent to the ear 22 of the blown free from powder channel 18 is arranged to shoot in the soul 20 in the channel 18 , The soul has a tip 15 and a decorative tail 23 on. The 6c shows the soul 20 in now inserted state in the channel 18 of the strap blank 17 from the end of the channel adjacent to the ear 18 out, with the decorative tail 23 the soul 20 the end of the stirrup blank 17 or the temple changed decorative. Thus, in specific cases, a soul within the bracket, such as metal core or wire or plastic core, also from the back of the frame blank - so from the ear of the customer adjacent end of the frame blank - are introduced into the frame blank.

In principle, instead of compressed air, suction air can be used by means of a device generating negative pressure. In this case, the powder located in the channel by negative pressure by means of a retracting cannula into the channel 24 sucked out of it, which in principle in the 7a to 7c is shown. A suction cannula 24 sucks the loose or compressed powder 21 during a forward movement of the cannula 24 in the channel 14 into it.

And in principle, instead of compressed air or suction air (negative pressure), a liquid 26 which are used by means of a cannula 25 under pressure as hydraulic fluid in the channel 14 what is pressed in the 8a to 8c is shown. In this way the loose powder becomes together with the liquid 26 from the channel 14 flushed out by the at least one channel opening. Water can be used as pressure fluid.

LIST OF REFERENCE NUMBERS

1

Upright blanks or later temples

2

Channel inside the temples blanks

3

Receiving opening for a frontally arranged in the bracket joint part of a spectacle joint

4

channel opening

5

Closures of the canal either at the ear removed or adjacent end of the stirrup blank

6

Longitudinal axis of the stirrup blanks

7

Upright blanks or later temples

8th

Closures of the canal either at the ear removed or adjacent end of the stirrup blank

9

Upright blanks or later temples

10

Channel inside the temples blanks

11

Closures of the canal either at the ear removed or adjacent end of the stirrup blank

12

Closures of the canal either at the ear removed or adjacent end of the stirrup blank

13

Upright blanks or later temples

14

Channel inside the temples blanks

15

Tip of the soul

16

Blow cannula for compressed air

17

Upright blanks or later temples

18

Channel inside the temples blanks

19

Face of the stirrup blank

20

Soul, either metal core or wire or plastic core

21

Powder of the manufacturing substrate, either loose or compressed

22

channel opening

23

Decorative end of the soul, preferably at the end of the frame blank adjacent to the ear

24

Suction

25

Cannula for a pressure fluid

26

liquid

r

Diameter of the bladder or suction cannula for compressed air or negative pressure or diameter of the cannula for a pressure fluid

s

Lights inside diameter of the channel

s> r

The clear inner diameter of the channel is always larger than the outer diameter of the cannula

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 201010001101 [0002]

Claims (15)

Method for producing temple (1,7,9,13,17) with a core (20), such as metal core, wherein the blanks (1,7,9,13,17) of the temple (1,7,9,13 , 17) are produced ("printed") in an additive manufacturing process, such as, for example, selective laser sintering (SLS) using a suitable plastic as the production substrate, characterized in that during the production process (printing process) of the stirrup blank (1,7, 9,13,17) within the same an elongated channel (2,10,14,18) along the longitudinal axis (6) of the stirrup blank (1,7,9,13,17) molded (printed), wherein the channel (2 , 10, 14, 18) either a) is formed so as to remain open at the end of the stirrup blank (1, 7, 9, 13, 17) facing away from the ear, with a closure (5, 11, 12, 15) of the channel (2, 10) , 14,18) at the opposite end of the stirrup blank (1,7,9,13,17) or b) is formed open at the end facing the ear with a closure (5,11,12,15) at the opposite end d it is molded open at both ends or d) at both ends by means of a respective closure (5,11,12,15) from the manufacturing substrate is formed closed forming and e ) subsequently in the channel (2, 10, 14, 18) produced according to one of the features a) or b) or c), either through its front or rear end, the core (20) into the channel (2, 10, 14, 18 ) or f) at least one of the closures (5, 11, 12, 15) is removed in a channel (2, 10, 14, 18) produced according to feature d) and then the core (20) is inserted into the channel (2 10,14,18) either from the end of the stirrup blank (1,7,9,13,17) facing away from the ear or from the ear adjacent to the ear, through one of the channel openings (4, 22) into the channel (2, 10, 14,18) is introduced. Method according to Claim 1 , characterized in that after the printing of the stirrup blank (1,7,9,13,17) from the channel (2,10,14,18) produced according to one of the features a) or b) or c) or d) at least one of the closures (5,11,12,15) is removed and then by means of compressed air from the channel (2,10,14,18) within the same befindliches loose powder to the outside through the at least one channel opening (4, 22) is blown out and then the core (20) is introduced through one of the channel openings (4, 22) into the channel (2, 10, 1418). Method according to Claim 1 , characterized in that after the printing of the stirrup blank (1,7,9,13,17) from the channel (2,10,14,18) produced according to one of the features a) or b) or c) or d) at least one of the closures (5, 11, 12, 15) is removed and thereafter by vacuum (suction) from the channel (2,10,14,18) within the same loose powder to the outside through the at least one channel opening (4, 22) is sucked off and then the soul (20) through one of the channel openings (4,22) in the channel (2, 10, 14, 18) is introduced. Method according to Claim 1 , characterized in that after the printing of the stirrup blank (1,7,9,13,17) from the channel (2,10,14,18) produced according to one of the features a) or b) or c) or d) at least one of the closures (5,11,12,15) is removed and thereafter by means of a liquid (pressure fluid) from the channel (2,10,14,18) within the same loose powder to the outside through the at least one channel opening (4,22 ) is flushed out and then the soul (20) through one of the channel openings (4,22) in the channel (2, 10, 14, 18) is introduced. Method according to Claim 2 or 3 or 4 , characterized in that the admission of the channel (2,10,14,18) by means of compressed air or by means of negative pressure or by means of a pressure fluid for blowing or sucking or flushing of the channel (2,10,14,18) of powder residues with a device which produces either compressed air, such as by means of a compressed air gun, or negative pressure or a hydraulic fluid. Method according to Claim 2 or 3 or 4 , characterized in that on the compressed air or vacuum or pressure fluid generating means a bladder (16) or suction cannula (24) for air or cannula (25) for a liquid (26) is placed, whose outer diameter (r) is less than the clear width (s) of the channel (2,10,14,18), wherein the compressed air or the pressure fluid through the cannula (16,25) into the channel (2,10,14,18) or introduced the suction air through the Cannula (24) is sucked out of the channel (2,10,14,18). Method according to Claim 2 or 3 or 4 , characterized in that a flexible cannula (16,24,25) is used as a blowing or suction or Druckflüssigkeitskanüle (16,24,25), which during its insertion into the channel (2,10,14,18) of the Upright blanks (1,7,9,13,17) and during the blowing or suction or rinsing the curvature of the channel (2,10,14,18) follows. Method according to one of the preceding claims, characterized in that an open channel opening (4, 22) at the end of the stirrup blank (1, 7, 9, 13, 17) adjacent to the ear is inserted after insertion of the core (20) through a channel Opening (4,22) is closed at the end facing away from the ear of the frame blank (1,7,9,13,17) with a plastic plug. Method according to one of the preceding claims, characterized in that the end of the core (20) with which it is introduced into the channel (2, 10, 14, 18) has a tip (15) and during its insertion into the channel (2,10,14,18) is helically rotated about its own longitudinal axis. Method according to one of the preceding claims, characterized in that the beginning of the channel (2,10,14,18) of the stirrup blank (1,7,9,13,17) on its or parallel to the end face (19) is arranged. Method in modification of Claim 1 , characterized in that as a soul (20) for introduction into the channel (2,10,14,18) instead of a metal core, a plastic core (20) is used. Method according to Claim 1 , characterized in that the stirrup blank (1,7,9,13,17) with at least one or both ends closed channel (2,10,14,18) is subjected in a known manner to a dyeing process. Method according to one of the preceding claims, characterized in that in blanks that have been prepared according to one of the characterizing features a) or b) or c) and which are to be subjected to a dyeing process, the at least one channel opening or both are closed prior to dyeing and only after the dyeing of at least one of the closures is removed, the blowing out or sucking or flushing of the channel is carried out by loose powder and then the soul is inserted into the channel. Method according to one of the preceding claims, characterized in that in blanks which have been prepared according to the characterizing feature d) and are then subjected to a dyeing process only after the dyeing at least one of the closures is removed, the blowing or sucking or flushing of the channel of loose powder takes place and then the soul is introduced into the channel. Temples, with a soul (20) made of plastic or metal, wherein the stirrup blank (1,7,9,13,17) of the individual temples in an additive manufacturing process, such as Selective Laser Sintering (SLS), made of a plastic suitable for this purpose ("Printed"), in its manufacture characterized by one of the aforementioned methods of Claims 1 to 14 ,

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