Cutter for machining hot nozzle of hot runner

Abstract

The utility model relates to the technical field of hot runner machining and manufacturing, in particular to a cutter for machining a hot nozzle of a hot runner. The cutter comprises a cutter handle; the drill bit section is used for drilling holes; the milling cutter section is connected with the drill bit section and the cutter handle so as to mill the hole drilled by the drill bit section; the chamfering section is arranged on the milling cutter section, is close to the drill bit section and is used for chamfering a hole drilled by the drill bit section; the milling cutter section, the chamfering section and the drill bit section jointly form a cutter bar, and the cutter bar is a tungsten steel alloy cutter bar. The cutter bar comprises the milling cutter section, the chamfering section and the drill bit section, drilling machining of the hot nozzle can be completed at a time, the machining speed is high, the cutter bar is a tungsten steel alloy cutter bar, the cutter vibration phenomenon is not prone to occurring in the machining process, and the problem that in the prior art, when the hot nozzle is machined, the machining efficiency is high is effectively solved. The technical problem that the machining efficiency of the hot nozzle is low due to the fact that a compound tool is low in cutting speed and prone to tool vibration in the machining process is solved.

Description

Technical Field

[0001] This utility model relates to the field of hot runner processing and manufacturing technology, and in particular to a cutting tool for processing hot runner nozzles. Background Technology

[0002] Hot runners are an important component of hot runner molds. They use heating to keep the plastic in the runners and gates molten. A typical hot runner system mainly consists of a main manifold, nozzles, a temperature controller, and auxiliary parts. Currently, when machining pre-drilled holes in molds, it is necessary to first drill the holes, then finish the drilled holes, and finally chamfer the openings of the finished holes. This process is cumbersome, time-consuming, and labor-intensive, requiring frequent tool changes, resulting in low machining accuracy of the holes.

[0003] To address the aforementioned issues, utility model patent document CN209394045U discloses a composite cutting tool. This composite cutting tool includes a tool shank and a tool holder connected collinearly. The tool shank has a drill cutting edge, a reamer cutting edge, and a chamfering cutting edge arranged sequentially from its free end toward the tool holder. This composite cutting tool, which combines a drill bit, a reamer, and a chamfering tool, allows for the machining of the pre-reserved hole in one operation by simply drilling at the pre-reserved hole position in the mold. The operation is simple, convenient, and quick. Furthermore, there is no need to change the tool during the machining of the pre-reserved hole, avoiding misalignment errors caused by tool replacement and ensuring the quality of the pre-reserved hole machining.

[0004] However, for hot runner nozzles, the inner diameter of the nozzle tip and core is small and the length is long, and the taper of the inner hole is large. When using the above-mentioned composite tool for machining, the blade is prone to vibration, which leads to interruption of the machining process and thus low machining efficiency. In addition, the reamer mainly uses scraping and cutting to machine the hole. This machining method has a slow cutting speed, which also leads to low machining efficiency of the hot nozzle. Utility Model Content

[0005] This utility model provides a cutting tool for machining hot runner nozzles, in order to solve the technical problems of slow cutting speed of composite tools and easy vibration phenomenon during the machining process, which leads to low machining efficiency of hot nozzles in the prior art.

[0006] To solve the above problems, the cutting tool for machining hot runner nozzles provided by this utility model adopts the following technical solution:

[0007] A cutting tool for machining hot runner nozzles, comprising:

[0008] Handle;

[0009] The drill bit section, used for drilling;

[0010] A milling cutter section, which is connected to the drill bit section and the tool holder, is used to mill the hole drilled by the drill bit section;

[0011] A chamfer section is provided on the milling cutter section and close to the drill bit section to chamfer the hole drilled by the drill bit section;

[0012] The milling cutter section, the chamfering section, and the drill bit section together constitute a tool holder, which is a tungsten carbide alloy tool holder.

[0013] The beneficial effects of the cutting tool for machining hot runner nozzles provided by this utility model are: 1) By setting a tool holder including a drill section, a chamfering section, and a milling cutter section, drilling, milling, and forming of the R-angle contour of the hot runner nozzle can be completed in one go, with fast processing speed and high precision; 2) The milling cutter section on the tool holder is used for finishing the hole drilled by the drill bit. The milling cutter has a large cutting edge and chip space, can withstand higher cutting forces and cutting speeds, and has a simple structure, which greatly improves the processing efficiency of the hot runner nozzle; 3) It is made of general tool steel, and when its diameter is... When the ratio of the thickness of the workpiece to the thickness of the material being processed exceeds four times, the rigidity of the tool holder is relatively low, making it more susceptible to the effects of cutting forces and vibrations, resulting in oscillation and chatter marks on the tool holder. This invention uses a tungsten carbide alloy tool holder, which has high rigidity and strength, and can withstand greater cutting and impact forces. When the ratio of the diameter of the tungsten carbide alloy tool holder to the thickness of the workpiece reaches five times, it can still cut normally, reducing the possibility of interruption in the processing due to tool holder oscillation, thereby improving the processing efficiency of the hot nozzle.

[0014] In summary, this utility model has improved and upgraded existing cutting tools, effectively solving the technical problems of slow cutting speed of composite tools and easy vibration phenomenon during the processing of hot nozzles, resulting in low processing efficiency of hot nozzles.

[0015] Furthermore, a chip removal section is provided between the milling cutter section and the tool holder.

[0016] Furthermore, the chip removal section is provided with chip removal grooves to remove metal chips generated during the hot nozzle processing.

[0017] Furthermore, the surface of the tungsten carbide alloy tool holder is coated with a wear-resistant coating to increase its wear resistance and extend its service life.

[0018] Furthermore, the wear-resistant coating is a DLC diamond coating.

[0019] Furthermore, the thickness of the DLC diamond coating is 3 micrometers.

[0020] Furthermore, the milling cutter section is a four-flute milling cutter. Attached Figure Description

[0021] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the cutting tool for machining hot runner nozzles provided by this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the cutting tool for machining hot runner nozzles provided by this utility model. Figure 2

[0024] Figure 3 This is a schematic diagram of the application structure of the cutting tool provided by this utility model for machining hot runner nozzles;

[0025] Figure 4 for Figure 3 The diagram shows a cross-sectional view (AA) of the application structure.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Drill bit section; 2. Chamfering section; 3. Milling cutter edge; 4. Tool holder; 5. Chip removal groove; 6. Hot nozzle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that the main concept of the tool for machining hot runner nozzles provided by this utility model is as follows: by setting a drill section, a chamfering section, and a Hell milling cutter section on the tool holder, drilling, milling, and forming of the R-angle contour of the hot nozzle can be completed in one go, with high machining efficiency and high precision; the milling cutter has a large cutting edge and chip space, which can withstand higher cutting forces and cutting speeds, and its simple structure can improve the machining efficiency of the hot nozzle; in addition, the tool holder is made of tungsten steel alloy, which can withstand greater cutting forces and impact forces, reducing the possibility of vibration phenomenon, thereby improving the machining efficiency of the hot nozzle.

[0030] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0031] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0032] Example 1 of the cutting tool for machining hot runner nozzles provided by this utility model:

[0033] like Figures 1 to 4 As shown, the tool used for machining hot runner nozzles includes a tool holder and a tool shank 4. The tool holder is made of tungsten carbide alloy and includes a drill section 1, a chamfering section 2, and a milling cutter section. Tungsten carbide alloy has excellent properties such as high hardness, good wear resistance, high strength, good toughness, heat resistance, and corrosion resistance, ensuring that it can work normally at a temperature of 500℃ and still has high hardness at 1000℃.

[0034] Specifically, drill bit section 1 is used for drilling.

[0035] Specifically, the milling cutter section is connected to the drill bit section 1 and the tool holder 4 to mill the hole drilled by the drill bit section 1 to meet the requirements. The milling cutter section is a four-flute milling cutter with four milling cutting edges 3.

[0036] Specifically, the chamfer section 2 is set on the milling cutter section and close to the drill bit section 1 to chamfer the hole drilled by the drill bit section 1 so that it meets the requirements.

[0037] Specifically, the total cutting length of the drill section 1 and the milling cutter section is 40mm, the length of the tool holder 4 is 50mm, the chamfer radius of the chamfer section 2 is 10mm, the diameter of the tool holder 4 is 14mm, and the drill tip angle of the drill section 1 is 120°.

[0038] Specifically, the surface of the tungsten carbide tool holder is coated with a DLC diamond-like carbon coating (DLC coating, Diamond-like Carbon Coating) as a wear-resistant coating, with a thickness of 3 micrometers. The DLC diamond coating effectively protects the cutting edge of the tungsten carbide tool holder, making it less prone to corrosion and resulting in a sharper cutting edge. Simultaneously, due to the high hardness of tungsten carbide, even when the cutting edge is subjected to external impact, the DLC coating will not crack or peel off, thus extending the service life of the tungsten carbide tool holder and better ensuring the machining accuracy of the hot-tipped nozzle.

[0039] In addition, a chip removal section is provided between the milling cutter section and the tool holder 4. The chip removal section is 35mm long. A chip removal groove 5 is provided on the milling cutter section, extending from the cutter head to the tail of the chip removal section, so as to remove the metal chips generated during the hot nozzle machining process in a timely manner.

[0040] The working principle of the tool for machining hot runner nozzles provided by this utility model is as follows: When machining hot nozzles, the material to be machined is installed on the machine tool worktable, and the tool holder 4 is installed above the machine tool worktable through a fixture. Then the machine tool is started, and the tool holder 4 and the tool bar move downward relative to the material to be machined and gradually come into contact with the material to be machined. The drill section 1 drills a hole in the material to be machined, the chamfer section 2 chamfers the bottom end of the drilled hole, and the milling cutter section performs finishing on the hole, so that drilling and milling can be completed in one go to produce the shaped hot nozzle 6. The metal chips generated during the machining process are discharged from the chip removal groove 5.

[0041] Embodiment 2 of the cutting tool for machining hot runner nozzles provided by this utility model:

[0042] Its main difference from Example 1 is:

[0043] In Example 1, the cutting edge length of the drill section, chamfer section, and milling cutter section is 40mm, the chip removal section is 35mm long, the tool holder is 50mm long, the chamfer radius of the chamfer section is 10mm, the diameter of the tool holder section is 14mm, and the drill tip angle of the drill section is 120°.

[0044] In this embodiment, the cutting edge length, chip removal section length, tool holder length, chamfer radius, tool holder diameter, and turning angle of the tungsten carbide alloy tool holder are made according to the inner hole contour line of the hot nozzle to ensure that the hot nozzle can be drilled and milled in one go, and to ensure its processing efficiency and dimensional accuracy.

[0045] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," and "bottom," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as a limitation on the present invention.

[0046] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A tool for machining a hot runner hot tip, characterized by, The utility model relates to a drill bit, which comprises: a handle; a drill bit section for drilling holes; a milling cutter section connected to the drill bit section and the handle to mill the holes drilled by the drill bit section; a chamfering section arranged on the milling cutter section and close to the drill bit section to chamfer the holes drilled by the drill bit section; the milling cutter section, the chamfering section and the drill bit section together form a tool bar, which is a tungsten alloy tool bar.

2. The tool for machining a hot-duct hot-tip of claim 1, wherein, A chip removal section is arranged between the milling cutter section and the handle.

3. The tool for machining a hot-duct hot-tip of claim 2, wherein, Chip removal grooves are formed on the chip removal section to remove metal chips generated during the drilling process.

4. The tool for machining hot-duct hot-nozzles according to any one of claims 1 to 3, characterized in that, The surface of the tungsten alloy tool bar is sprayed with a wear-resistant coating to increase its wear resistance and prolong its service life.

5. The tool for machining a hot-duct hot-tip of claim 4, wherein, The wear-resistant coating is a DLC diamond coating.

6. The tool for machining a hot-duct hot-tip of claim 5, wherein, The thickness of the DLC diamond coating is 3 microns.

7. The tool for machining a hot-duct hot-tip according to any one of claims 1 to 3, characterized in that, The milling cutter section is a four-blade milling cutter.

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