CN112706374A - Hot runner nozzle and method for manufacturing hot runner nozzle based on 3D grafting printing - Google Patents
Hot runner nozzle and method for manufacturing hot runner nozzle based on 3D grafting printing Download PDFInfo
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- CN112706374A CN112706374A CN202011446500.XA CN202011446500A CN112706374A CN 112706374 A CN112706374 A CN 112706374A CN 202011446500 A CN202011446500 A CN 202011446500A CN 112706374 A CN112706374 A CN 112706374A
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- 238000007639 printing Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 54
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000010146 3D printing Methods 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 14
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical group [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 34
- 229910052721 tungsten Inorganic materials 0.000 claims description 21
- 239000010937 tungsten Substances 0.000 claims description 21
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- 238000005516 engineering process Methods 0.000 abstract description 27
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- 239000010959 steel Substances 0.000 description 14
- 239000000956 alloy Substances 0.000 description 13
- 229910045601 alloy Inorganic materials 0.000 description 13
- 238000001746 injection moulding Methods 0.000 description 11
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- 229910052751 metal Inorganic materials 0.000 description 9
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/278—Nozzle tips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a hot runner nozzle and a method for manufacturing the same based on 3D grafting printing, and relates to the technical field of hot runner nozzles. A method for manufacturing a hot runner nozzle based on 3D grafting printing comprises the steps of installing a substrate on 3D printing equipment, and extracting a model of a nozzle tip to be printed through 3D printing software; the 3D printing equipment takes tungsten powder as a raw material to print the tip of a nozzle on a substrate; and after the nozzle tips are printed, the substrate processing factory corresponding to the nozzle tips is made into the nozzle body. The hot runner nozzle is lower in cost, the wear resistance is improved on the basis of guaranteeing the heat conduction performance, and the service life of the hot runner nozzle is prolonged. By the method, the part processing cost can be effectively saved and the processing efficiency can be improved by utilizing the 3D grafting and printing technology.
Description
Technical Field
The invention relates to the technical field of hot runner nozzles, in particular to a hot runner nozzle and a method for manufacturing the hot runner nozzle based on 3D grafting printing.
Background
The hot runner injection molding process comprises the steps of heating raw materials such as engineering plastic raw materials, PE, PP and glass fibers in a cavity to a fluid state, and entering an injection mold for molding through a hot runner nozzle at the front end. The hot runner system generally comprises a hot runner nozzle, a heating device and the like, wherein the hot runner nozzle mainly comprises three materials, namely beryllium copper, hard alloy and common die steel (H13, P20). The use of hot runner nozzle materials requires first wear resistance and second good thermal conductivity. Beryllium copper has good thermal conductivity, but is not wear-resistant; the common die steel has poor heat conductivity but good wear resistance; the cost of cemented carbide is too high.
Disclosure of Invention
In order to overcome the problems or at least partially solve the problems, embodiments of the present invention provide a hot runner nozzle and a method for manufacturing the hot runner nozzle based on 3D graft printing, which increase wear resistance while ensuring thermal conductivity, so as to improve the service life of the hot runner nozzle.
The embodiment of the invention is realized by the following steps:
in one aspect, the present invention provides a hot runner nozzle, including a nozzle body and a nozzle tip connected to a front end of the nozzle body, wherein the nozzle body is connected to a heating device, and the nozzle tip is made of tungsten. In the present embodiment, the material of the nozzle body may be a metal having good heat conductivity, for example, beryllium copper.
The hot runner nozzle in the prior art is different from the hot runner nozzle in the invention in structure, the hot runner nozzle in the prior art is integrally formed and mainly made of beryllium copper, hard alloy or common die steel, and the beryllium copper has good heat conductivity but is not wear-resistant; the common die steel has poor heat conductivity but good wear resistance; the hot runner nozzle comprises a nozzle main body and a nozzle tip connected to the front end of the nozzle main body, wherein the nozzle main body can be made of beryllium copper, the rear end of the nozzle main body is used for being connected with a heating device, the front end of the nozzle main body is connected with the nozzle tip, the nozzle tip is made of tungsten, compared with beryllium copper and common die steel, the tungsten has the characteristics of high hardness and high melting point, and the hot runner injection molding process generally injects a fluid raw material from an outlet of the hot runner nozzle into an injection mold for molding, so that the hot runner nozzle has high requirements on high wear resistance and heat conductivity, and the hot runner nozzle provided by the invention comprises the nozzle main body and the nozzle tip, the nozzle tip is made of tungsten, and the nozzle main body can be made of beryllium copper, the whole hot runner nozzle has extremely high wear resistance and good heat conduction performance, the conditions of a hot runner injection molding process are completely met, compared with the hot runner nozzle adopting hard alloy, the cost is lower, the wear resistance is improved on the basis of ensuring the heat conduction performance, and the service life of the hot runner nozzle is prolonged.
In some embodiments of the present invention, the nozzle body is made of beryllium copper.
In another aspect, the present invention provides a method for manufacturing a hot runner nozzle based on 3D grafting printing, including the steps of:
installing the substrate on 3D printing equipment, and extracting a model of the tip of a nozzle to be printed through 3D printing software;
the 3D printing equipment takes tungsten powder as a raw material to print the tip of a nozzle on a substrate;
and after the nozzle tips are printed, the substrate processing factory corresponding to the nozzle tips is made into the nozzle body.
According to the method, the 3D grafting printing technology is utilized to print the component with the complex structure on the basis of the original simple component of the part, and the 3D printing technology is combined with the traditional manufacturing technology, so that the part processing cost can be effectively saved, and the processing efficiency is improved. The hot runner nozzle manufactured by the 3D grafting printing technology is composed of a nozzle main body and a nozzle tip, the nozzle tip is made of tungsten, and the nozzle main body can be made of beryllium copper, so that the whole hot runner nozzle has high wear resistance and good heat conduction performance, the conditions of a hot runner injection molding process are completely met, compared with the hot runner nozzle adopting hard alloy, the hot runner nozzle is lower in cost, the wear resistance is improved on the basis of guaranteeing the heat conduction performance, and the service life of the hot runner nozzle is prolonged.
In some embodiments of the invention, the nozzle tips are printed using selective laser melting techniques.
In some embodiments of the invention, the processing of the substrate into the nozzle body after printing the nozzle tip comprises:
printing a plurality of nozzle tips on one of the substrates
Cutting the substrate into a plurality of sub-substrates, each of the sub-substrates corresponding to a nozzle tip;
the submount is machined into the nozzle body using CNC techniques to obtain a pre-machined hot runner nozzle.
In some embodiments of the present invention, the method further comprises sharpening the as-machined hot runner nozzle to obtain a finished hot runner nozzle.
In some embodiments of the present invention, the substrate has a cubic structure.
In some embodiments of the present invention, the substrate is made of beryllium copper.
In some embodiments of the present invention, the tungsten powder is spherical.
In some embodiments of the invention, the tungsten powder has a diameter of 15-53 μm.
The embodiment of the invention at least has the following advantages or beneficial effects:
in one aspect, the present invention provides a hot runner nozzle, including a nozzle body and a nozzle tip connected to a front end of the nozzle body, wherein the nozzle body is connected to a heating device, and the nozzle tip is made of tungsten.
In the prior art, a hot runner nozzle is integrally formed and mainly made of beryllium copper, hard alloy or common die steel, and the beryllium copper has good heat conductivity but is not wear-resistant; the common die steel has poor heat conductivity but good wear resistance; the hot runner nozzle is composed of a nozzle main body and a nozzle tip connected to the front end of the nozzle main body, wherein the nozzle main body can be made of beryllium copper, the rear end of the nozzle main body is used for being connected with a heating device, the front end of the nozzle main body is connected with the nozzle tip, the nozzle tip is made of tungsten, compared with beryllium copper and common die steel, tungsten has the characteristics of high hardness and high melting point, and the hot runner injection molding process is that a fluid raw material flows out from an outlet of the hot runner nozzle and is injected into an injection mold for molding, so that the hot runner nozzle has high requirements on high wear resistance and heat conduction performance, and the hot runner nozzle provided by the invention is composed of the nozzle main body and the nozzle tip, the nozzle tip is made of tungsten, and the nozzle main body can be made of beryllium copper, so that the whole nozzle has high wear resistance and good heat conduction performance, the hot runner nozzle completely meets the conditions of the hot runner injection molding process, has lower cost compared with a hot runner nozzle adopting hard alloy, increases the wear resistance on the basis of ensuring the heat conductivity, and prolongs the service life of the hot runner nozzle.
In another aspect, the present invention provides a method for manufacturing a hot runner nozzle based on 3D grafting printing, including the steps of: installing the substrate on 3D printing equipment, and extracting a model of the tip of a nozzle to be printed through 3D printing software; the 3D printing equipment takes tungsten powder as a raw material to print the tip of a nozzle on a substrate; and after the nozzle tips are printed, the substrate processing factory corresponding to the nozzle tips is made into the nozzle body.
According to the method, the 3D grafting printing technology is utilized to print the component with the complex structure on the basis of the original simple component of the part, and the 3D printing technology is combined with the traditional manufacturing technology, so that the part processing cost can be effectively saved, and the processing efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a hot runner nozzle according to the present invention;
FIG. 2 is a flow chart of a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention;
FIG. 3 is another flow chart of a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention;
fig. 4a is a front view of a nozzle tip printed on a substrate in a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention;
FIG. 4b is a top view of a nozzle tip printed on a substrate in a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention;
fig. 4c is a schematic structural diagram of the sub-substrate and the nozzle tips corresponding to each other one by one after the substrate is cut in the method for manufacturing the hot runner nozzle based on 3D grafting and printing according to the present invention;
FIG. 4D is a front view of a hot runner nozzle after being processed in a method for manufacturing the hot runner nozzle based on 3D grafting printing according to the present invention;
fig. 4e is a perspective view of a hot runner nozzle after being processed in the method for manufacturing the hot runner nozzle based on 3D grafting printing according to the present invention.
Icon: 1. a hot runner nozzle; 11. a nozzle body; 12. a nozzle tip; 2. a substrate; 21. a submount.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is only for convenience and simplification of the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention.
In the description of the embodiments of the present invention, "a plurality" represents at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "mounted" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Before the embodiments are explained in detail, the terms used in the embodiments need to be resolved:
3D grafting printing technology: the method is characterized in that simple components of an object are manufactured through traditional mechanical equipment, components with complex structures are printed on the basis of original simple components of parts by using a 3D grafting and printing technology, and the 3D printing and traditional manufacturing technology are combined, so that the part processing cost can be effectively saved, and the processing efficiency is improved.
Selective Laser Melting (SLM): the method is a main technical approach in metal material additive manufacturing, laser is selected as an energy source, layer-by-layer scanning is carried out on a metal powder bed layer according to a planned path in a three-dimensional CAD slicing model, the scanned metal powder achieves the effect of metallurgical bonding through melting and solidification, and finally a metal part designed by the model is obtained. The SLM technique overcomes the difficulties associated with the conventional techniques for manufacturing metal parts having complex shapes. It can directly form metal parts with almost full compactness and good mechanical properties.
CNC technology: the CNC technology is a computer numerical control technology, and generally, a special computer is adopted and is provided with an interface circuit, so that the action of a plurality of numerical control devices can be controlled. This technique uses a computer to perform control functions for the device according to a control program stored in advance. The computer is used to replace the original digital control device composed of hardware logic circuit, so that the realization of various control functions of input data storage, processing, operation, logic judgment, etc. can be completed by computer software.
Referring to fig. 1, fig. 1 is a schematic structural view of a hot runner nozzle according to the present invention; in one aspect, the present invention provides a hot runner nozzle 1, including a nozzle body 11 and a nozzle tip 12 connected to a front end of the nozzle body 11, wherein the nozzle body 11 is connected to a heating device, and the nozzle tip 12 is made of tungsten. In the present embodiment, the material of the nozzle body 11 may be a metal having good heat conductivity, for example, beryllium copper.
The hot runner nozzle 1 in the prior art is different from the hot runner nozzle 1 in the invention in structure, the hot runner nozzle 1 in the prior art is integrally formed and mainly made of beryllium copper, hard alloy or common die steel, and the beryllium copper has good thermal conductivity but is not wear-resistant; the common die steel has poor heat conductivity but good wear resistance; the hard alloy has high cost and cannot achieve good heat conductivity and high wear resistance, the hot runner nozzle 1 provided by the invention comprises a nozzle main body 11 and a nozzle tip 12 connected to the front end of the nozzle main body 11, the nozzle main body 11 can be made of beryllium copper, the rear end of the nozzle main body 11 is used for being connected with a heating device, the front end of the nozzle main body 11 is connected with the nozzle tip 12, the nozzle tip 12 is made of tungsten, compared with beryllium copper and common die steel, tungsten has the characteristics of high hardness and high melting point, and a hot runner injection molding process generally injects a raw material in a fluid state into an injection mold from an outlet of the hot runner nozzle 1 for molding, so that the hot runner nozzle 1 has high requirements on high wear resistance and heat conductivity, while the hot runner nozzle 1 provided by the invention comprises the nozzle main body 11 and the nozzle tip 12, the nozzle tip 12 is made of tungsten, and the nozzle body 11 is made of beryllium copper, so that the whole hot runner nozzle 1 has extremely high wear resistance and good heat conduction performance, the conditions of a hot runner injection molding process are completely met, compared with the hot runner nozzle 1 made of hard alloy, the cost is lower, the wear resistance is improved on the basis of ensuring the heat conduction performance, and the service life of the hot runner nozzle 1 is prolonged.
In some embodiments of the present invention, the nozzle body 11 is beryllium copper.
The aim of the arrangement is to combine the good thermal conductivity of beryllium copper with the good wear resistance of tungsten, so that the whole hot runner nozzle 1 has good thermal conductivity and wear resistance.
Referring to fig. 2, 4a and 4b, fig. 2 is a flowchart illustrating a method for manufacturing a hot runner nozzle based on 3D grafting printing according to the present invention; fig. 4a is a front view of a nozzle tip 12 printed on a base plate 2 in a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention; fig. 4b is a top view of the nozzle tip 12 printed on the substrate 2 in a method of manufacturing a hot runner nozzle based on 3D graft printing according to the present invention. In another aspect, the present invention provides a method for manufacturing a hot runner nozzle based on 3D grafting printing, including the steps of:
s1, installing the substrate 2 on a 3D printing device, and extracting a model of the nozzle tip 12 to be printed through 3D printing software;
s2, the 3D printing equipment takes tungsten powder as raw material to print the nozzle tip 12 on the substrate 2;
s3, the substrate 2 corresponding to the nozzle tip 12 is processed into the nozzle body 11 after the nozzle tip 12 is printed.
A plurality of nozzle tips 12 can be printed on one substrate 2, and fig. 4a and 4b are shown as structural diagrams after the nozzle tips 12 are printed on the substrate 2.
According to the method, the 3D grafting printing technology is utilized to print the component with the complex structure on the basis of the original simple component of the part, and the 3D printing technology is combined with the traditional manufacturing technology, so that the part processing cost can be effectively saved, and the processing efficiency is improved. The hot runner nozzle 1 manufactured by the 3D grafting printing technology is composed of a nozzle main body 11 and a nozzle tip 12, the nozzle tip 12 is made of tungsten, and the nozzle main body 11 can be made of beryllium copper, so that the whole hot runner nozzle 1 has extremely high wear resistance and good heat conductivity, the conditions of a hot runner injection molding process are completely met, compared with the hot runner nozzle 1 made of hard alloy, the cost is lower, the wear resistance is improved on the basis of guaranteeing the heat conductivity, and the service life of the hot runner nozzle 1 is prolonged.
In some embodiments of the present invention, the nozzle tip 12 is printed using selective laser melting techniques.
The selective laser melting technology overcomes the trouble caused by manufacturing metal parts with complex shapes by the traditional technology. It can directly form metal parts with almost full compactness and good mechanical properties.
Referring to fig. 3, 4c, 4D and 4e, fig. 3 is a flowchart illustrating a method for manufacturing a hot runner nozzle based on 3D grafting printing according to the present invention; fig. 4c is a schematic structural diagram of the sub-substrate 21 and the nozzle tip 12 corresponding to each other after the substrate 2 is cut in the method for manufacturing the hot runner nozzle based on 3D grafting printing according to the present invention; fig. 4D shows the hot runner nozzle 1 after being processed in the method for manufacturing the hot runner nozzle based on 3D grafting and printing according to the present invention; fig. 4e is a perspective view of a hot runner nozzle after being processed in the method for manufacturing the hot runner nozzle based on 3D grafting printing according to the present invention. In some embodiments of the present invention, the processing of the substrate 2 into the nozzle body 11 after printing the nozzle tips 12 comprises:
s31, printing a plurality of nozzle tips 12 on one of the substrates 2;
s32, cutting the substrate 2 into a plurality of sub-substrates 21, each sub-substrate 21 corresponding to a nozzle tip 12;
during cutting, the cutter cuts downward perpendicular to the substrate 2, and after cutting, the structure diagram of the sub-substrate 21 and the nozzle tip 12 corresponding to each other is shown in fig. 4 c;
s33, the sub-base plate 21 is machined into the nozzle body 11 by CNC technology to obtain the as-machined hot runner nozzle 1.
The sub-substrates 21 corresponding to each other one by one and the sub-substrates 21 in the nozzle tips 12 are preliminarily processed, and the CNC technology, namely the computer numerical control technology, is preferably selected, and the technology adopts a special computer and is provided with an interface circuit, so that the control of the actions of a plurality of numerical control devices can be realized. This technique uses a computer to perform control functions for the device according to a control program stored in advance. The computer is used to replace the original digital control device composed of hardware logic circuit, so that the realization of various control functions of input data storage, processing, operation, logic judgment, etc. can be completed by computer software.
Fig. 4d and fig. 4e are schematic structural diagrams of the hot runner nozzle 1 after processing.
In some embodiments of the invention, further comprising:
and S34, sharpening the primary machined hot runner nozzle 1 to obtain the finished hot runner nozzle 1.
The substrate 2 is a cubic structure, and the substrate 2 may have other shapes, such as a cylindrical shape, and the like, and the substrate 2 may be modified and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The material of the substrate 2 is beryllium copper, for example. The aim of the arrangement is to combine the good thermal conductivity of beryllium copper with the good wear resistance of tungsten, so that the whole hot runner nozzle 1 has good thermal conductivity and wear resistance.
Illustratively, the tungsten powder is spherical. Tungsten powder is used as a raw material for 3D printing, and is spherical, and is easier to melt than other shapes.
Illustratively, the tungsten powder has a diameter of 15-53 μm. After long-term research and practice of the inventor, tungsten powder with the diameter of 15-53 mu m is found to be the most suitable raw material for 3D printing.
In summary, according to an aspect of the present invention, the hot runner nozzle 1 includes a nozzle body 11 and a nozzle tip 12 connected to a front end of the nozzle body 11, the nozzle body 11 is connected to a heating device, and the nozzle tip 12 is made of tungsten.
In the prior art, a hot runner nozzle 1 is integrally formed and mainly made of beryllium copper, hard alloy or common die steel, and the beryllium copper has good heat conductivity but is not wear-resistant; the common die steel has poor heat conductivity but good wear resistance; the cost of hard alloy is too high, the hot runner nozzle 1 of the invention is composed of a nozzle body 11 and a nozzle tip 12 connected to the front end of the nozzle body 11, the material of the nozzle body 11 can be beryllium copper, the rear end of the nozzle body 11 is used for connecting with a heating device, the front end of the nozzle body 11 is connected with the nozzle tip 12, the material of the nozzle tip 12 is tungsten, compared with beryllium copper and common die steel, tungsten has the characteristics of high hardness and high melting point, and the hot runner injection molding process is to generally pour the raw material in a fluid state from the outlet of the hot runner nozzle 1 into an injection mold for molding, so the hot runner nozzle 1 has high requirement on high wear resistance and heat conductivity, while the hot runner nozzle 1 provided by the invention is composed of the nozzle body 11 and the nozzle tip 12, the material of the nozzle tip 12 is tungsten, the material of the nozzle body 11 can be beryllium copper, the whole hot runner nozzle 1 has extremely high wear resistance and good heat conduction performance, the conditions of a hot runner injection molding process are completely met, compared with the hot runner nozzle 1 adopting hard alloy, the cost is lower, the wear resistance is improved on the basis of ensuring the heat conduction performance, and the service life of the hot runner nozzle 1 is prolonged.
In another aspect, the present invention provides a method for manufacturing a hot runner nozzle based on 3D grafting printing, including the steps of: installing the substrate 2 on a 3D printing device, and extracting a model of a nozzle tip 12 to be printed through 3D printing software; the 3D printing equipment takes tungsten powder as a raw material to print a nozzle tip 12 on the substrate 2; after the nozzle tip 12 is printed, the substrate 2 corresponding to the nozzle tip 12 is processed into the nozzle body 11.
According to the method, the 3D grafting printing technology is utilized to print the component with the complex structure on the basis of the original simple component of the part, and the 3D printing technology is combined with the traditional manufacturing technology, so that the part processing cost can be effectively saved, and the processing efficiency is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It is obvious to the person skilled in the art that the present application is not restricted to details of the above-described exemplary embodiments, but that the present application can be implemented in other specific forms without departing from the spirit or the characteristics of the substrate 2. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A hot runner nozzle, comprising a nozzle body and a nozzle tip attached to a front end of the nozzle body, wherein the nozzle tip is made of tungsten.
2. The hot runner nozzle according to claim 1, wherein the nozzle body is beryllium copper.
3. A method for manufacturing a hot runner nozzle based on 3D grafting printing is characterized by comprising the following steps:
installing the substrate on 3D printing equipment, and extracting a model of the tip of a nozzle to be printed through 3D printing software;
the 3D printing apparatus prints the nozzle tip as described in claim 1 or 2 on a substrate with tungsten powder as a raw material;
and after the nozzle tips are printed, the substrate processing factory corresponding to the nozzle tips is made into the nozzle body.
4. The method of manufacturing a hot runner nozzle based on 3D graft printing of claim 3, wherein the nozzle tip is printed using selective laser melting techniques.
5. The method for manufacturing the hot runner nozzle based on 3D grafting printing as claimed in claim 4, wherein the step of forming the substrate processing factory into the nozzle body after printing the nozzle tip comprises:
printing a plurality of nozzle tips on one of the substrates;
cutting the substrate into a plurality of sub-substrates, each sub-substrate corresponding to a nozzle tip;
the submount is machined into the nozzle body using CNC techniques to obtain a pre-machined hot runner nozzle.
6. The method of manufacturing a hot runner nozzle based on 3D graft printing of claim 5, further comprising sharpening the as-machined hot runner nozzle to obtain a finished hot runner nozzle.
7. The method for manufacturing the hot runner nozzle based on 3D grafting printing according to any one of claims 3 to 6, wherein the base plate is in a cubic structure.
8. The method for manufacturing the hot runner nozzle based on 3D grafting printing according to any one of claim 7, wherein the material of the base plate is beryllium copper.
9. The method for manufacturing the hot runner nozzle based on 3D grafting printing according to claim 8, wherein the tungsten powder is spherical.
10. The method for manufacturing the hot runner nozzle based on 3D grafting printing as claimed in claim 8, wherein the tungsten powder diameter is 15-53 μm.
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| CN202011446500.XA CN112706374A (en) | 2020-12-11 | 2020-12-11 | Hot runner nozzle and method for manufacturing hot runner nozzle based on 3D grafting printing |
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