3D printing anti-blocking nozzle

Abstract

The utility model relates to the field of printers, in particular to a 3D printing anti-blocking nozzle which comprises a shell, a discharging head and a sliding rod, the sliding rod comprises a handle facilitating an operator and an ejector pin used for penetrating through the discharging head in a poking mode, the sliding rod slides in the axial direction of the sliding rod under limitation and guide of the shell, and the axis of the ejector pin and the axis of the discharging head are collinear. After a user pulls or presses the sliding rod, the ejector pin can clean the inner diameter of the discharging head, and raw materials are prevented from remaining in the discharging head; if the raw materials are hardened, the ejector pin can also extrude out part of the raw materials of the discharging head, at the moment, an operator pulls out residual filaments through tweezers, and the cleaning efficiency can also be improved. After the anti-blocking nozzle is used for a period of time, the sliding rod can be manually pulled, the discharging head can be properly conducted, and the period of disassembling and replacing the discharging head is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of printers, and in particular relates to a 3D printing anti-blocking nozzle. Background Art

[0002] 3D printing is an additive manufacturing method that creates three-dimensional parts by printing adhesive materials layer by layer. In common 3D printers, the nozzle is the key material output part, and the device squeezes the consumables into the heated nozzle. However, due to cold drawing (the last printing material is retained in the nozzle and cools and hardens), nozzle accumulation of dirt (dust or debris), slow nozzle flow rate, etc., the nozzle is prone to clogging. The more common cleaning method is to use tweezers to pull out the remaining filaments in the nozzle, wipe it with a rag, or clean it with acetone solvent.

[0003] However, the above cleaning work requires the nozzle to be disassembled, and repeated disassembly and assembly of the nozzle affects the processing progress. Utility Model Content

[0004] The utility model aims to provide a 3D printing anti-clogging nozzle which can maintain the patency of the nozzle without disassembling the nozzle.

[0005] To achieve the above-mentioned purpose, the utility model provides a 3D printing anti-blocking nozzle, including a shell and a discharge head, a storage cavity is arranged inside the shell, a material injection port is arranged on the side of the shell, the shell and the discharge head are detachably connected, and the anti-blocking nozzle also includes a slide rod, one end of the slide rod is located on the outside of the shell as a handle, and the other end of the slide rod is located on the inside of the shell as a ejector pin, the axis line of the ejector pin is colinear with the axis line of the discharge head, the outer diameter of the ejector pin is smaller than the inner diameter of the discharge head, the slide rod can be telescopically slid relative to the shell, and the user pushes the ejector pin in and out of the inside of the discharge head through the handle.

[0006] As an improvement of the above scheme, the ejector is provided with a first stepped shaft protruding outward at one end close to the handle, and a spring is provided between the handle and the housing. Under the push of the spring elastic force, the slide bar has a tendency to move away from the injection port, and the first stepped shaft abuts against the storage cavity to limit the distance that the slide bar pops outward. When external force is applied to the handle, the ejector begins to insert into the injection port.

[0007] As an improvement of the above scheme, the spring is sleeved on the handle, and a second step shaft is provided at the root of the handle and the top of the shell. The outer diameter of the second step shaft is equal to the inner diameter of the spring. The second step bearing supports and guides the spring to expand and contract, thereby improving the stability of the spring movement.

[0008] As an improvement of the above solution, a sealing gasket is provided on the side of the first stepped shaft that is in contact with the material storage cavity.

[0009] As an improvement of the above-mentioned scheme, the outer shell includes a first shell serving as a material storage chamber and a second shell for connecting a material discharge head, the outer side of the second shell is in the shape of a stepped shaft, the upper side of the first shell is provided with a circular hole for facilitating the movement of the handle, the lower side of the first shell wraps the smaller end of the second shell, and the first shell and the second shell are welded and fixed.

[0010] As an improvement to the above solution, the handle and the ejector pin are respectively provided with a stud and a screw hole, the handle and the ejector pin are detachably connected via a thread, and the maximum diameter of the ejector pin does not exceed the inner diameter of the injection port, so that the ejector pin can be placed into the storage cavity from the injection port.

[0011] As an improvement of the above solution, a heater for keeping the shell warm or heating the shell is arranged on the outer side of the shell, and a heat-insulating protective sleeve is arranged on the outer side of the heater.

[0012] As an improvement of the above solution, the injection port is located on the side of the shell.

[0013] The utility model has the following beneficial effects: after the user pulls or presses the slide bar, the ejector can clean the inner diameter of the discharge head to prevent the raw material from remaining in the discharge head; if the raw material has hardened, the ejector can also squeeze out part of the raw material from the discharge head, and the operator can use tweezers to pull out the remaining filaments, which can also improve the cleaning efficiency. After the anti-blocking nozzle has been used for a period of time, the slide bar can be manually pulled to properly conduct the discharge head, thereby extending the period of disassembly and replacement of the discharge head. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a cross-sectional view of an anti-clogging nozzle according to an embodiment.

[0015] Explanation of the reference numerals: 11, first shell; 12, second shell; 21, injection port; 22, discharge head; 31, handle; 32, ejector pin; 33, spring; 34, first stepped shaft; 41, heater; 42, thermal insulation protective cover. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0019] Reference Figure 1 The utility model discloses a 3D printing anti-blocking nozzle, including a shell and a discharge head 22. The shell is provided with a storage cavity inside, and a material injection port 21 is provided on the side of the shell. The shell and the discharge head 22 are detachably connected, and the discharge head 22 is a conventional threaded connection structure, which is connected to the shell in a screw-in manner. The anti-blocking nozzle also includes a slide rod, one end of which is located on the outside of the shell as a handle 31, and the other end of the slide rod is located on the inside of the shell as an ejector pin 32. The axis of the ejector pin 32 is colinear with the axis of the discharge head 22. The outer diameter of the ejector pin 32 is smaller than the inner diameter of the discharge head 22. The slide rod can be telescopically slidable relative to the shell, and the user pushes the ejector pin 32 in and out of the inside of the discharge head 22 through the handle 31. Figure 1 As shown, the length of the ejector pin 32 is reasonably designed to ensure that the ejector pin 32 can be inserted at least to the depth of the discharge head 222 / 3.

[0020] As an improvement of the above scheme, the ejector pin 32 is provided with a first stepped shaft 34 protruding outward at one end close to the handle 31, and a spring 33 is provided between the handle 31 and the housing. Under the push of the elastic force of the spring 33, the slide rod has a tendency to move away from the injection port 21, and the first stepped shaft 34 abuts against the storage cavity to limit the distance that the slide rod pops outward. When external force is applied to the handle 31, the ejector pin 32 begins to insert into the injection port 21 to push out the filament in the injection port 21.

[0021] As an improvement of the above scheme, the spring 33 is sleeved on the handle 31, and the root of the handle 31 and the top of the shell are both provided with a second stepped shaft, the outer diameter of the second stepped shaft is equal to the inner diameter of the spring 33, and the second stepped bearing supports and guides the spring 33 to expand and contract, thereby improving the stability of the movement of the spring 33.

[0022] As an improvement of the above solution, the handle 31 is made of a material that is not heat-conductive or has a low thermal conductivity to prevent the heat of the ejector pin 32 from scalding the operator.

[0023] As an improvement of the above solution, a sealing gasket is provided on the side of the first stepped shaft 34 that fits the material storage cavity. With the above solution, when the material storage cavity is full of consumables, the consumables will press the first stepped shaft 34 upwards, and at the same time, the consumables can be prevented from overflowing from the gap between the slide bar and the shell; the greater the injection force of the consumables, the greater the pressure on the first stepped shaft 34, and the first stepped shaft 34 will fit the shell more closely.

[0024] As an improvement of the above-mentioned scheme, the outer shell includes a first shell 11 serving as a material storage chamber and a second shell 12 for connecting a discharge head 22. The outer side of the second shell 12 is in the shape of a stepped shaft. The upper side of the first shell 11 is provided with a circular hole for facilitating the movement of the handle 31. The lower side of the first shell 11 wraps the smaller end of the second shell 12. The joint between the first shell 11 and the second shell 12 is in a circular ring shape. The first shell 11 and the second shell 12 are welded and fixed, and the weld is processed around the joint.

[0025] As an improvement of the above solution, the handle 31 and the ejector pin 32 are respectively provided with a stud and a screw hole, the handle 31 and the ejector pin 32 are detachably connected by a thread, and the maximum diameter of the ejector pin 32 does not exceed the inner diameter of the injection port 21, so that the ejector pin 32 can be placed into the material storage cavity from the injection port 21. The above solution is adopted to facilitate the assembly of the anti-blocking nozzle.

[0026] In addition to the booster pump delivering the molten consumables, as an improvement on the above scheme, a heater 41 is provided on the outside of the shell for keeping the shell warm or heating the shell, mainly for maintaining a constant temperature, and a heat insulating protective cover 42 is provided on the outside of the heater 41.

[0027] As an improvement of the above solution, the injection port 21 is located on the side of the shell.

[0028] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A 3D printing anti-blocking nozzle, comprising a shell and a discharge head, wherein a material storage cavity is arranged inside the shell, a material injection port is arranged on the side of the shell, and the shell and the discharge head are detachably connected, characterized in that: The anti-blocking nozzle also includes a sliding rod, one end of which is located on the outside of the shell as a handle, and the other end of the sliding rod is located on the inside of the shell as a ejector pin, the axis of the ejector pin is collinear with the axis of the discharge head, the outer diameter of the ejector pin is smaller than the inner diameter of the discharge head, the sliding rod can be telescopically slid relative to the shell, and the user pushes the ejector pin in and out of the interior of the discharge head through the handle.

2. The 3D printing anti-blocking nozzle according to claim 1, characterized in that: The ejector is provided with a first stepped shaft protruding outward at one end close to the handle, and a spring is provided between the handle and the shell. Under the push of the spring elastic force, the slide bar has a tendency to move away from the injection port, and the first stepped shaft abuts against the storage cavity to limit the distance that the slide bar pops outward. When external force is applied to the handle, the ejector begins to insert into the injection port.

3. The 3D printing anti-blocking nozzle according to claim 2, characterized in that: The spring is sleeved on the handle, and the root of the handle and the top of the shell are both provided with a second stepped shaft, the outer diameter of the second stepped shaft is equal to the inner diameter of the spring, and the second stepped bearing supports and guides the spring to expand and contract, thereby improving the stability of the spring movement.

4. The 3D printing anti-blocking nozzle according to claim 3, characterized in that: A sealing gasket is arranged on one side of the first stepped shaft that is in contact with the material storage cavity.

5. The 3D printing anti-blocking nozzle according to claim 4, characterized in that: The outer shell includes a first shell serving as a material storage chamber and a second shell for connecting a material discharge head. The outer side of the second shell is in the shape of a stepped shaft. A circular hole is provided on the upper side of the first shell to facilitate the movement of the handle. The lower side of the first shell wraps around the smaller end of the second shell. The first shell and the second shell are welded and fixed.

6. The 3D printing anti-blocking nozzle according to claim 5, characterized in that: The handle and the ejector pin are respectively provided with a stud and a screw hole, and the handle and the ejector pin are detachably connected via a thread, and the maximum diameter of the ejector pin does not exceed the inner diameter of the injection port, so that the ejector pin can be placed into the storage cavity from the injection port.

7. The 3D printing anti-blocking nozzle according to claim 1, characterized in that: A heater for keeping the shell warm or heating the shell is arranged on the outer side of the shell, and a heat-insulating protective sleeve is arranged on the outer side of the heater.

8. The 3D printing anti-blocking nozzle according to claim 1, characterized in that: The injection port is located on the side of the shell.

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