A molding tool for processing flow channel undercut

Abstract

The utility model relates to the technical field of cutting tools, and discloses a forming tool for processing flow channel undercuts, comprising a tool handle and a tool head connected to the tool handle, the tool head comprising a tool body connected to the tool handle, a plurality of blades protruding outwards are arranged at one end of the tool body away from the tool handle, the outer side of each blade is provided with two cutting edges with different angles, and the outer contour of the blade is the same as the inner contour of the undercut structure; the tool head rotates synchronously with the tool handle, so that the protruding blade can cut the inner side surface of the flow channel body, thereby forming an undercut structure corresponding to its outer contour, and the outer side of the blade adopts a double-angle cutting edge, which can make the cutting process smoother and more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a forming tool for processing flow channel undercuts. Background Art

[0002] Nowadays, plastic products are increasingly used, including many plastic products that are updated and iterated faster and faster, and the time required for plastic products in the injection molding process is getting shorter and shorter; in order to meet the needs, designers usually add undercuts to the mold runners (such as Figure 6 As shown in the figure, the material head can be pulled by the undercut structure during injection molding, so that the multi-cavity product can fall off automatically, saving the time of separating the material head and the product in the later stage.

[0003] In order to realize the process of adding undercuts to the mold runner, corresponding molding tools are needed. However, this process is currently only implemented in some well-known mold companies. There are currently no special tools on the market that are specifically designed to process such runner undercuts. Therefore, it is urgent to develop a special tool for processing runner undercut molding. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a forming tool for processing flow channel undercuts, which utilizes a tool handle to drive a tool head to rotate so that the blade of the tool head cuts an undercut structure of a corresponding contour in a flow channel body through rotation, and the outer side of the blade is designed with two cutting edges of different angles to form a double-angle cutting edge structure, making the cutting process smoother and more efficient.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A forming tool for processing flow channel undercuts comprises a tool handle and a tool head connected to the tool handle, wherein the tool head comprises a tool body connected to the tool handle, and a plurality of outwardly protruding blades are arranged at one end of the tool body away from the tool handle, and two cutting edges with different angles are arranged on the outer side of each blade, and the outer contour of the blade is the same as the inner contour of the undercut structure.

[0007] Optionally, three blades are provided, and the three blades are distributed in a circular array around the axis of the blade body.

[0008] Optionally, a chip removal groove is provided between each two adjacent cutting edges, and one end of the chip removal groove extends to the tool body.

[0009] Optionally, the chip removal groove is in a spiral shape distributed around the axis of the tool body.

[0010] Optionally, the end faces of the two cutting edges meet to form a ridge line, and the angle between the ridge line and the axis of the blade body is 57.5 degrees.

[0011] Optionally, the outer diameter of the blade body is 1.3 mm, and the distance between the outermost side of the blade and the axis of the blade body is 1 mm.

[0012] Optionally, a space-avoiding portion for avoiding air is further provided between the knife handle and the knife head, and two ends of the space-avoiding portion are respectively connected to the knife handle and the knife body.

[0013] Optionally, the outer side surface of the air-avoiding portion is a conical surface, and the cone angle of the conical surface is 75 degrees.

[0014] Beneficial Effects

[0015] (1) The cutter head of the utility model rotates synchronously with the cutter handle, so that the protruding blade can cut the inner side surface of the flow channel body, thereby forming an undercut structure corresponding to its outer contour, and the outer side of the blade adopts a double-angle cutting edge, which can make the cutting process smoother and more efficient.

[0016] (2) The cutter head of the utility model has three blades. When the handle rotates one circle, the three blades cut in turn, which can not only improve the efficiency of the forming process, but also achieve the purpose of improving the wear resistance of the forming tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a side view structural schematic diagram of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the cutter head of the utility model;

[0020] Figure 4 It is a main structural schematic diagram of the utility model;

[0021] Figure 5 It is a schematic diagram of the axonometric structure of the utility model;

[0022] Figure 6 It is a schematic diagram of the position structure of the runner body and the undercut structure on the mold body;

[0023] Among them, 1. tool handle; 2. tool head; 21. tool body; 22. blade; 221. cutting edge; 23. chip groove; 3. air avoidance part; 4. mold body; 5. runner body; 6. undercut structure. DETAILED DESCRIPTION

[0024] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0025] Embodiment 1

[0026] like Figure 1-Figure 6 As shown, a forming tool for processing flow channel undercuts comprises a tool handle 1, a tool head 2 and a gap-avoiding portion 3 for connecting the tool handle 1 and the tool head 2; wherein, the clamping diameter of the tool handle 1 is designed to be a commonly used large size to ensure that the tool is stable during high-speed cutting while being adaptable to commonly used heat-shrink clamping tool handles; the tool head 2 is used to cut the material on the inner side of the flow channel body 5 on the mold body 4 so that an undercut structure 6 with the same contour as the blade 22 of the tool head 2 is formed inside; the gap-avoiding portion 3 serves to connect the tool handle 1 and the tool head 2 and to ensure that the tool handle 1 will not collide and interfere with the material during the cutting process of the tool head 2.

[0027] As mentioned above, the cutter head 2 includes a cutter body 21 connected to the cutter handle 1, and a plurality of outwardly protruding blades 22 are provided at one end of the cutter body 21 away from the cutter handle 1, and the axial dimension of the blade 22 gradually decreases radially away from the cutter body 21 from the side connected to the cutter body 21, and the outer contour of the blade 22 is the same as the internal contour of the undercut structure 6.

[0028] The material of cutter head 2 is high-strength tungsten steel, and the surface is coated with black titanium aluminum nitride (AlTiN), which greatly improves the hardness, wear resistance and lower friction coefficient of the tool, and obtains better cutting performance and longer tool life.

[0029] The outer side of each blade 22 is provided with two cutting edges 221 with different angles to form a double-angle cutting edge structure. Different angles can adapt to different cutting tasks, making the cutting process smoother and more efficient, and also helping to obtain a smoother and neater cutting surface or cutting edge; a smaller angle ensures a certain sharpness, while a larger angle improves the strength and durability of the cutting edge 221; and a reasonable angle combination can reduce excessive wear on specific parts of the cutting edge 221, and different angles can make the force distribution during cutting more reasonable, reduce the risk of damage to the cutting edge 221, and extend the service life.

[0030] Furthermore, three blades 22 are provided, and the three blades 22 are distributed in a circular array around the axis of the blade body 21; a chip groove 23 is provided between each two adjacent blades 22, one end of the chip groove 23 extends to the blade body 21, and the chip groove 23 is in a spiral shape distributed around the axis of the blade body 21.

[0031] The cutter head 2 uses a three-edge sharpening method to ensure rapid chip removal in the chip groove 23 while ensuring the strength of the tool as much as possible, and the tool edge band uses different angles to effectively ensure good support and cutting ability during processing.

[0032] The tool chip groove 23 is designed to be a large-angle spiral groove. The waste generated by cutting will be discharged along the chip groove 23 according to inertia, avoiding affecting the cutting accuracy and product accuracy, and ensuring that the tool removes chips in time during the processing to the greatest extent, without squeezing, breaking chips, and sticking to the tool, thereby achieving higher processing efficiency and quality.

[0033] Compared with the two-edge sharpening method, it can perform more cutting in one rotation, which can improve processing efficiency and reduce tool wear; compared with the four-edge sharpening method, its processing and manufacturing is simpler and can save costs.

[0034] In addition, the air avoidance portion 3 is located between the tool handle 1 and the tool head 2 to facilitate the connection between the two. The two ends of the air avoidance portion 3 are respectively connected to the tool handle 1 and the tool body 21. Its main function is to avoid air avoidance and prevent interference. During the processing, it can avoid collision and interference between the tool and other components such as the workpiece or the fixture, thereby ensuring the smooth progress of the processing. It can also facilitate the flexible movement and operation of the tool in a specific environment, reduce the probability of abnormal wear of the tool due to unnecessary contact, and help maintain the accuracy and stability of the processing by avoiding unnecessary interference factors, thereby improving the processing precision.

[0035] Based on this, the outer diameter of the clearance portion 3 gradually increases along the axial direction from the cutter head 2 to the tool handle 1 , that is, the diameters of the two ends of the clearance portion 3 are the same as those of the tool handle 1 and the tool body 21 .

[0036] Embodiment 2

[0037] On the basis of the first embodiment, the utility model also proposes specific dimensions of the forming tool.

[0038] The two ends of the handle 1 and the blade head 2 facing each other are both flat, and the distance between the two end planes is 30mm; the outer side surface of the avoidance portion 3 is a conical surface with a cone angle of 75 degrees, and the distance between the two ends of the avoidance portion 3 is 3mm, that is, the minimum distance between the blade body 21 and the handle 1 is 3mm.

[0039] The distance between the end face of the handle 1 connected to the avoidance portion 3 and the end face of the cutter head 2 facing away from the handle 1 is 6 mm; the outer diameter of the cutter body 21 is 1.3 mm, and the distance between the outermost side of the blade 22 and the axis of the cutter body 21 is 1 mm, that is, the diameter of the circle formed when the outermost side of the blade 22 rotates around the axis of the cutter body 21 is 2 mm.

[0040] The end surfaces of the two cutting edges 221 on the same blade 22 meet to form a ridge line, and the angle between the ridge line and the axis of the blade body 21 is 57.5 degrees, that is, the angle between two adjacent ridge lines in the same plane is 115 degrees.

[0041] At present, the forming tool for processing flow channel undercut proposed by the utility model has been officially put into use within the company, and has successfully completed the mold processing of several key projects, and the tool accuracy can be controlled within plus or minus 0.01mm.

[0042] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0044] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A molding tool for machining flow channel undercuts, comprising a tool handle (1) and a tool head (2) connected to the tool handle (1), characterized in that: The blade head (2) comprises a blade body (21) connected to the blade handle (1); a plurality of blades (22) protruding outwards are arranged at one end of the blade body (21) away from the blade handle (1); the outer side of each blade (22) is provided with two cutting edges (221) with different angles; and the outer contour of the blade (22) is the same as the inner contour of the undercut structure (6).

2. The molding tool for processing flow channel undercut according to claim 1, characterized in that: Three blades (22) are provided, and the three blades (22) are distributed in a circular array around the axis of the blade body (21).

3. The molding tool for processing flow channel undercut according to claim 2, characterized in that: A chip removal groove (23) is provided between each two adjacent blades (22), and one end of the chip removal groove (23) extends to the blade body (21).

4. The molding tool for processing flow channel undercut according to claim 3, characterized in that: The chip removal groove (23) is in a spiral shape distributed around the axis of the tool body (21).

5. The molding tool for processing flow channel undercut according to claim 4, characterized in that: The end surfaces of the two cutting edges (221) meet to form a ridge line, and the angle between the ridge line and the axis of the blade body (21) is 57.5 degrees.

6. The molding tool for processing flow channel undercut according to claim 5, characterized in that: The outer diameter of the blade body (21) is 1.3 mm, and the distance between the outermost side of the blade (22) and the axis of the blade body (21) is 1 mm.

7. The molding tool for processing flow channel undercut according to claim 1, characterized in that: A clearance portion (3) for avoiding air is also provided between the knife handle (1) and the knife head (2), and two ends of the clearance portion (3) are respectively connected to the knife handle (1) and the knife body (21).

8. The molding tool for processing flow channel undercut according to claim 7, characterized in that: The outer side surface of the air avoidance portion (3) is a conical surface, and the cone angle of the conical surface is 75 degrees.

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