KR20170045078A - A filament welder for welding a themoplasticity material filament - Google Patents

A filament welder for welding a themoplasticity material filament Download PDF

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Publication number
KR20170045078A
KR20170045078A KR1020150145036A KR20150145036A KR20170045078A KR 20170045078 A KR20170045078 A KR 20170045078A KR 1020150145036 A KR1020150145036 A KR 1020150145036A KR 20150145036 A KR20150145036 A KR 20150145036A KR 20170045078 A KR20170045078 A KR 20170045078A
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KR
South Korea
Prior art keywords
filament
filaments
metal
blocks
protrusion
Prior art date
Application number
KR1020150145036A
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Korean (ko)
Inventor
김한성
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김한성
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Publication date
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Priority to KR1020150145036A priority Critical patent/KR20170045078A/en
Publication of KR20170045078A publication Critical patent/KR20170045078A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/28—Flame or combustible material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a welding machine for bonding filaments made of thermoplastic materials. To this end, a generally used electricity-driven heater is removed, and thus it is possible to produce inexpensive welding machines by removing power devices, control devices, and temperature sensors required in an operation of the electric heater and reducing costs to assemble the components.

Description

TECHNICAL FIELD [0001] The present invention relates to a welding apparatus for welding a thermoplastic material to a filament,

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a welding machine for connecting filaments used in a 3D printer, and a conventional filament welding machine has a high manufacturing cost due to its complicated structure, This is a filament welding machine which can be manufactured at a low price without any additional device such as a power supply device, a temperature sensor, a heater, and a temperature controller in order to prevent the filament from being welded and connected.

In a 3D printer, a thermoplastic resin, which is used in a 3D printing method (often referred to as FDM (Fused Deposition Method)) in which a thermoplastic resin is formed into a filament form and wrapped on a bobbin to supply it to a 3D printer, Plastic filaments' (hereinafter referred to as "filament") are generally supplied in a bundle of 1 kg or 500 g.

In a 3D printer, a single print may range from a few tens of grams to hundreds of grams, but the larger the object is printed, the more residual filaments remaining on the bobbin are consumed prior to the completion of printing of the desired print, The probability increases.

In the printer for printing on paper, even if a plurality of sheets of ink or toner are consumed during printing, the printout that has already been printed can be saved, and only the printing after the printing is not performed due to no ink is available. There is a problem that you can not print the printout already printed and print it again from the beginning.

Therefore, there is a demand to connect the filament in use with a new filament.

These users use a characteristic that the filament is thermoplastic (the property of melting as a liquid phase when heated and becoming solid as it cools), and a metal block having a hole such as the diameter of the filament A block composed of a metal having a good conduction ability against heat such as aluminum having a structure capable of being split in half), the filament end being used and the beginning of the new filament are brought into contact with each other, The temperature is raised to the temperature at which the filament melts, and both ends of the two filaments are melted in a liquid phase. When the two filaments are pushed and the ends of the melted fibers are connected, a hole such as a filament diameter in the aluminum block The ends of the two filaments melted in , Which it may be used in this connection, and then cooled in such a manner as to open the aluminum block using the associated filaments, the filaments and the other filaments in use smoothly.

As described above, 3D printer users want to connect two filaments. Therefore, filament welding machines used for this purpose have been developed. However, since these conventional welding machines are expensive, it is difficult to supply them to many users.

Considering the structure of the welder described above, it is necessary to process a dividable aluminum block having a hole into which two filaments can be inserted, and a frame having a structure for fixing and opening and closing it, A temperature sensor that detects the temperature, a controller that receives the temperature value of the temperature sensor and controls the heater to maintain the set temperature by feedback control, a power supply that supplies power to the devices, and a labor cost for assembling all of them And as a result, the cost of the welding machine rises.

Filaments for FDM 3D printers are now wrapped around the bobbin in 1kg increments and supplied to users. The retail price is currently around 20,000 ~ 25,000 won.

On the other hand, the filament welder has experimental products in the range of 80,000 won to 100,000 won, which is a high price for users to use at first glance considering the price of the filament.

Filaments for 3D printers fail to print for several hours to several tens of hours if they are used up in use. To avoid this problem, it is difficult to use the remaining filament after replacing the filament with a new one. Therefore, it is necessary to connect the used filament to the new filament, but in order to achieve this, it is necessary to develop an inexpensive filament welding machine so that it can be used by many users.

As described above, in order to solve the problem that the welding machine used for connection between the filaments used in the FDM 3D printer is made of a complicated structure and sold at an expensive price, the present invention makes the structure simple, The purpose of this paper is to provide a structure for dissemination.

This object of the present invention is achieved by two detachable blocks 101 and 102 having a hole 106 connecting the filament and the filament, a heating projection 103 extending from one or both of the two blocks, And can be made of only frames 201 and 202 having a structure that can be opened and closed.

In order to precisely control the melting temperature of the filament, the conventional filament welder is constituted by a heater which is heated by electric power, a sensor which senses the temperature of the heater, and a control unit which controls the heater by sensing the temperature. An expensive power supply device for driving the control device is required, and a labor cost for assembling and wiring these components is also required.

This raises the price of the device and makes the situation hard for many users to use.

The device according to the present invention aims to simplify this structure as much as possible to lower the cost of the device.

The key is not to use electric heaters.

Since no temperature control is required without using an electric heater, there is no need for a temperature sensor and a controller, and there is no need for a power supply that needs to be supplied. In addition, labor costs for assembling and wiring all of these can be reduced, resulting in a dramatic drop in final product prices.

Then another method of heating the filament is needed, which allows the user to use gas lighters, torches, candles, etc., which are often available around the user.

Using these methods does not deserve a way to detect the temperature and precise temperature control is not possible, so conventional filament welder developers have not used this method.

However, some of the existing filament welder developers are missing.

The melting range of the filaments is fairly wide.

This means that there is no need to control the precise melting temperature.

Among the filaments used in the FDM 3D printers, PLA filaments, which are the most widely used, are present in a liquid state in a wide temperature range from 180 degrees to 240 degrees.

In order to use the filament in a 3D printer for stable printing, an electric heater must be used to keep the melting temperature constant.

However, the filament welder can be made only by melting the filament because the desired temperature is achieved only by making the ends of the two filaments in a liquid state.

This is why the filament welder does not require the use of electric heaters that must be precisely controlled by electric furnaces.

To heat both ends of the filament with the heater (gas lighter, torch, etc.) without the heater, heat it only until it becomes a liquid state and control it below the non-burning temperature. .

The first is to use materials whose properties change at specific temperatures.

Typically, the most commonly available products are temperature sensing tape and paint. These products are made into a tape or paint form using a color-changing material at a specific temperature. This product is bonded to one of the blocks 101 and 102 having the filament connecting hole of the present invention (in this example, The heat is transferred to the heating projection part 103 which is in thermal contact with the filament connecting blocks 101 and 102 by the heat source 401 so that the heat is transmitted through the heating projection part 103 of a thermally conductive material The filament is transferred to the filament connecting block 101 and transferred to the upper filament connecting block 102 which is also in thermal contact with the block and the both ends of the filament are connected to the middle portion of the hole 112 generated in the two blocks (Temperature-sensitive color change tape in this example) in which the property (color or shape) changes in the melting temperature region is transferred to a part of the connecting block (113 in this example), and when the color of the tape changes, it is recognized that the user has reached a desired temperature. After removing the heat source 401, the filaments 105 and 106 are pushed to the central portion of the heating block, The two filaments are connected to each other.

The second method is to use time.

The first method also requires a consumable part called a heat-sensitive tape or paint, which is also a factor for raising the product price.

When this welder is manufactured, it is possible to obtain an experimental result that the temperature of the middle portion of the filament connecting block reaches a desired temperature after a specific time when a specific heat source (for example, a gas lighter) is used.

For example, after the manufacturer of the welding machine developed the product, the heating protrusion 104 was heated for about 20 seconds using a medium-sized gas lighter normally used at normal room temperature, then turned off, and the two filaments 105,106), and then putting it in the manual and releasing it in the manual, the user can smoothly carry out the filament welding without any temperature sensing means such as heat-sensitive tape or paint.

As described above, the present invention can smoothly perform filament welding without an electric heater that causes an increase in the price of the apparatus.

The filament welder according to the present invention can replace an expensive filament welder sold in the market at an inexpensive price.

Because it is manufactured without the electric heater and the related equipment which are essential in the conventional filament welder, it is also possible to reduce the cost of the parts and the expensive labor cost for assembly thereof.

As a result, users who have not been able to use the filament welding machine due to the high price of the existing filament welding machine can supply the filament welding machine to use the filament welding and connection function.

1 is a view for explaining each part of a heating part of a filament welding machine according to the present invention.
Fig. 2 shows a state in which the entire structure including the heating part of the filament welding machine according to the present invention and the frame supporting the heating part is opened.
Fig. 3 shows a state in which the entire structure including the heating part and the frame of the filament welder according to the present invention is closed.
FIG. 4 shows a path through which heat is transferred when a welding protrusion of a filament welder according to the present invention is heated.

Hereinafter, a filament welding machine according to a preferred embodiment of the present invention, in which two ends of two filaments are melted and connected without an electric heater, will be described in detail with reference to the drawings.

 1 is a view showing only a structure of a heating projection and a block for connecting and heating a filament which is a core component of a filament welding machine according to the present invention.

Two blocks 101 and 102 are provided which are provided with holes 112 through which the two filaments 105 and 106 to be connected with each other can pass through and which can be a source of the holes when the two filaments 105 and 106 are in contact with each other, (101 in this example) has a heating protrusion 103 provided at an intermediate portion of the filament connecting hole.

In this embodiment, the heating block 101 and the heating protrusion 103 are shown as separate components, but they may be formed of one component through casting or the like.

The welding machine thus prepared is fixed to the casing frames 201 and 202 as shown in Fig. 2, and the filaments are inserted into the holes corresponding to the diameters of the filaments between the heating blocks 101 and 102, and then the frame is closed. 3)

At this time, when the projections 122 are provided on one side of the two heating blocks 101 and 102 and the grooves 121 having a cross-section that closely matches the projections 122 are provided on the other side, the two heating blocks 101 and 102 are in contact with each other The hole 112 is not twisted when the circular arc of the filament connecting hole 112 is formed, and an accurate circular arc is created.

When the heating projection 103 is heated by the heat source 401 such as a gas lighter or a torch as shown in FIG. 4 after the preparation of connecting the two filaments in this way, this heat flows along the heat flows 411 and 412 in FIG. 101 and 102, and then escapes to the frames 201 and 202 mounted on both ends of the heating blocks 101 and 102 and the outside air after heating the both ends of the filaments 105 and 106.

The central portions of the heating blocks 101 and 102 where the ends of the filaments 105 and 106 are in contact are heated to a temperature sufficient to melt the filaments 105 and 106 and the filaments 105 and 106 remain solid at both ends of the heating blocks 101 and 102 It goes down to a temperature that can.

When it is desired to know the temperature of the central part of the heating blocks 101 and 102 at the time of such heating, the characteristic (color in the example) changes when the desired temperature is reached in the central part of one of the heating blocks 101 and 102 It is easy to know whether or not both ends of the filaments 105 and 106 have reached the melting point by installing a tape or the like, and it is possible to know whether or not the melted point has reached the time as described above.

If it is determined that both ends of the filaments 105 and 106 have reached the melting point, the heat source 401 is removed and heating is stopped. Then, one or both of the filaments 105 and 106 are pushed against each other, (105, 105).

When the filaments are cooled and then the frames 201 and 202 are opened after the lapse of time, both ends of the two filaments 105 and 106 are welded and connected to each other.

The filament heating blocks 101 and 102 and the heating protrusions 103 protruding from the filament heating blocks 101 and 102 are used to heat one end of the filament, thereby achieving inexpensive and effective filament welding connection without complicated temperature control.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the embodiments are for the purpose of illustration only and are not to be construed as limiting the scope of the invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

101. Heating block (bottom) with built-in filament connection holes.
102. Heating block (upper part) with built-in filament connection hole
103. A heating protrusion for transmitting heat to the filament heating block
104. In order to increase the area of contact with heat during heating, a hole
105. Filament 1
106. Filament 2
111. filament connecting hole 1
112. Filament connecting hole 2
113. Flat for attaching the temperature display part
121. Grooves for joining the heating block to the correct position
122. Protrusions for joining the heating block to the correct position
201. Frame for fixing the lower part of the heating block
202. A frame for fixing the upper part of a heating block
401. Heating heat source
411. Heat flow 1
412. Heat flow 2

Claims (7)

Metal blocks 101 and 102 having diametrically opposed holes 111 and 112 through which filaments 105 and 106 made of a thermoplastic material can pass and protrusions made of metal at one or both sides of the blocks 101 and 102 The two blocks 101 and 102 are brought into contact with each other so that the filament connecting holes 111 and 112 are made to be a full circle and then the end of the projecting portion 103 is heated by using a heat source 401 such as a gas lighter, The heated heat is transferred to the portions where the filaments of the metal blocks 101 and 102 meet along the protruding portion 103 of the metal and finally the filaments 105 and 106 that are butted in the holes 111 and 112 provided in the metal blocks 101 and 102 When the ends of the two filaments are heated and liquefied, the two filaments are pushed from both ends to the middle, and the melted portions of the two filaments are joined together. After cooling, the two metal blocks (101.102) Welders come equipped with a filament structure that can be removed The metal block (101, 102) according to claim 1, wherein a groove (121) is formed on one side of the metal block (101, 102) and a protrusion (122) having a cross section that fits the groove on the other side. The filament connecting holes 111 and 112 are formed in a filament welder The method of manufacturing a semiconductor device according to claim 1, wherein when the protrusion (103) of a metal material is formed, the protrusion (103) is formed of a separate processing component and is coupled to the metal blocks (101, 102) by bolting, welding, Filament welding machine The method of manufacturing a semiconductor device according to claim 1, wherein when the protrusion (103) of a metal material is formed, the protrusion (103) is integrally formed with the metal blocks (101, 102) by a method such as die casting, die casting, Filament welder with structure The protrusion (103) of a metal material according to claim 1, characterized in that a hole (104) is provided in a region heated by a heat source (401) in order to effectively absorb the heat transferred from the heat source welding machine A filament welding machine according to claim 1, characterized in that a surface (113) capable of attaching a material (temperature sensing tape or the like) whose property changes when a desired temperature is reached is provided in a specific region of the metal blocks (101, 102) In order to form the filament connecting holes 111 and 112 in the metal blocks 101 and 102, the connecting holes 111 and 112 may be formed of filaments And a plurality of the filament welders


KR1020150145036A 2015-10-18 2015-10-18 A filament welder for welding a themoplasticity material filament KR20170045078A (en)

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Application Number Priority Date Filing Date Title
KR1020150145036A KR20170045078A (en) 2015-10-18 2015-10-18 A filament welder for welding a themoplasticity material filament

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020054903A1 (en) * 2018-09-11 2020-03-19 주식회사 3디나라 Filament connector
KR102102318B1 (en) * 2019-02-21 2020-04-20 동명대학교산학협력단 Filament connector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020054903A1 (en) * 2018-09-11 2020-03-19 주식회사 3디나라 Filament connector
KR102102318B1 (en) * 2019-02-21 2020-04-20 동명대학교산학협력단 Filament connector

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