ANTI-CLOGGING PRINT HEAD WITH DIRECTED FLOW SYSTEM

Abstract

The invention relates to a printhead (hotend) for additive manufacturing and, in particular, three-dimensional (3D) printing technologies known in the literature as "Fused Filament Fabrication (FFF)" or "Fused Deposition Modeling (FDM)".

Description

1 TARIFF ANTI-CLOGGING PRINT HEAD WITH DIRECTED FLOW SYSTEM TECHNICAL FIELD The invention relates to additive manufacturing and, in particular, to what is known in the literature as “Fused Filament Fabrication (FFF)”. or three-dimensional (3D) printing called “Fused Deposition Modeling (FDM)” It relates to a print head (hotend) for these technologies. The invention allows for the simultaneous printing of two different materials (e.g., PLA-ABS) or in 3D printers. This is a hotend design that includes two inputs and one output, allowing for the printing of two different colors. PREVIOUS TECHNIQUE In the known state of the art, the print heads have filament inlet (1), fuse cartridge. (2), temperature gauge (3), auxiliary middle channel opening (4), outlet channel (6) and heater cartridge It includes the fixing screw hole (7) parts. As shown in Figures 2, 3 and 4. In traditional 2-input 1-output hotend designs, filaments are oriented at a 90-degree angle. Because it changes the flow, the flow becomes more difficult and blockages occur more frequently. This situation, This negatively impacts efficiency in the printing process, especially with multi-material or multi-color printing. It causes problems with printing. In traditional 2-input 1-output printheads, the filament inputs (1) are at the top. They are located and barrels are screwed into the holes at the top. These entry holes are shown in Figure 20. As seen in image 2, the hole opens into the lower part of the middle section, which is drilled all the way through. The ends of the holes are sealed with a gasket and screw, allowing the filament to exit through the middle section. It is directed to channel (6). In this case; • Filaments pushed through the barrels emerge from the inlet as shown in Figure 4. (1) To move towards the middle, first change direction by 90 degrees 25 It performs this and comes to the middle part and is directed to the exit channel (6). Here, it changes direction again by 90 degrees. This direction... The changes increase friction and the filament gets stuck in the print nozzle. This makes it difficult for him to get proper nutrition. • In the middle section, the gaskets used in the outer holes lose their properties over time. 30 It is losing material and causing leakage to the outside. • The outer holes in the middle section are sealed with screws and gaskets, as shown in Figure 2. As shown, dead zones (5) are formed. In these zones there is almost nothing Because there is no material flow, materials accumulate in these areas over time. 2 burning and new materials adhering to the burning material, flow This is making things increasingly difficult. After a while, this situation leads to a complete blockage. This is the reason. This requires a high level of maintenance. Also, the flow material flow at the specified rate in case of strain Because this will not happen, errors occur in the printed samples. 5 In the topics mentioned above, different materials such as PLA and ABS are used together. when printing, due to the different printing temperatures of the materials Blockages can occur. PLA material at temperatures of 190-200°C. While printable, ABS is printed at temperatures of 220-250°C. In this case, 10 especially during high-temperature ABS printing, in the print head Material accumulation occurs at the points where the filaments change direction by 90 degrees. This This causes increased friction and the material burns at the corners, creating a channel. It adheres to the walls. This initially makes flow difficult, but over time... The accumulation of burning material leads to blockages. Preventing this problem 15 to provide a straighter flow path by increasing the angles at the points of change of direction. and a printing method that is both compatible with traditional structures and easy and practical to produce. The need to design a title has arisen. THE PURPOSE OF THE INVENTION 20 The print head (hotend) that is the subject of the invention has a conventional 90 filament flow. A smooth filament transition using a 135-degree angle instead of a 100-degree change in direction. This ensures that clogging problems are minimized and the printing process is improved. It becomes smoother. At the same time, ease of production is also provided. The print head described in this invention is 25 times larger than traditional 2-input 1-output print heads. easily applicable and at the same time compatible with traditional machining methods. It can be easily manufactured. Thanks to its 135-degree directional change angles, it reduces friction. reduced, because the filament flow holes merge directly at the outlet hole, eliminating the need for an additional hole. It is not needed. This eliminates dead spots by saving material. It prevents burns and blockages. 30 LIST OF FIGURES Figure 1A. General view of the invention. Figure 1B. Isometric view of the invention. 3 Figure 2. Front view of a conventional 2-input 1-output hotend. Figure 3. Isometric view of a conventional 2-input 1-output hotend. Figure 4. Schematic representation of conventional 2-inlet 1-outlet hotend filament flow. . The corresponding numbers in the figures are: 5 1. Filament input 2. Heating cartridge 3. Temperature gauge 4. Auxiliary mid-canal orifice 5. Dead zones 10 6. Output channel 7. Heater cartridge fixing screw hole 1.1. Print Title 1.2. Filament Entry 1.3. Starting Point 15 1.4. Angle of Direction Change DETAILED DESCRIPTION OF THE INVENTION The invention includes a printing head (1.1) with beveled corners at 45 degrees. The filament inlets (1.2) that open from the bevels meet at the exit point (1.3). Filament 20 inputs (1.2) are at the top, as in traditional 2 input 1 output print heads. It is included and this design can be easily applied to traditional headwear. It also eliminates the need for channels found in traditional print heads. Because holes and dead spots are absent in this design, a smoother filament flow is achieved. This is ensured and friction is reduced. 45-degree chamfering of corners and flow 25 Opening the holes at these points facilitates production. The invention addresses the clogging problem encountered in traditional 2-input 1-output printing heads. To prevent problems such as material accumulation and burning, a temperature of 135 degrees is used. A print head design using direction change angles (1.4) has been designed. This design, It ensures a smoother filament flow and minimizes friction, making it 30 This largely prevents blockages. In addition, filament inlets (1.2) are connected to an additional channel. without needing to, they merge directly at the exit point (1.3), which eliminates dead zones It eliminates it. 4 In the known state of the art, filaments in available printheads are 90 When changing direction by degrees, in our invention the angles of change of direction are 135 degrees (1.4) This has been used to achieve less friction and a smoother filament flow. In traditional systems, material is used at the filament orientation change points. While accumulation and burns are frequently observed, in our invention these problems are resolved by removing 5 dead spots. by removing and merging the filament flow directly at the exit point (1.3) It is largely eliminated. The invention, with traditional machining methods It can be easily produced, which reduces production costs and increases its feasibility. It increases. The invention consists of a single part. Filament inlets (1.2), conventional 2 inlets 10 1 is located at the top, as in the print heads. 45 on the top edges. The chamfer is broken and filament inlets (1.2) are drilled through the surfaces of these chamfers. According to the types of teeth of the barrels to be used in filament entries (1.2), the entry ports Screw sizes can vary, being M5, M6, or M7. Similarly, the nozzle... The thread size at the point of exit (1.3) where it is installed can also be changed to M5, M6 or M7. It can show this. In a traditional 2-input 1-output print head, approximately 1 kg. While clogging occurs after filament printing, our invention handles more than 5 kg. The material can be printed without clogging issues. 25

Claims

REQUESTS 1. It has an anti-clogging print head with a directed flow system; its feature is: a print head with a 45-degree bevel at the corners (1.1), input part printing The filament inlets (1.2) located at the top of the header (1.1), 5 of the filament inlets (1.2) an exit point where they are connected by joining (1.3) and blockage, material accumulation and a 135-degree change in direction to prevent problems such as burning. It is characterized by including angles (1.4). 15 25