Machining method capable of machining chip mold part with sharp corner, chip mold part and plastic part product

Abstract

The invention provides a machining method capable of machining a chip mold part with a sharp corner, the chip mold part and a plastic part product, and belongs to the technical field of injection molding. The machining method comprises the rough machining step, specifically, a first structural part and a second structural part are machined according to a preset shape, and a first structural part prefabricated product and a second structural part prefabricated product can be in limiting clearance fit; preparing a finish machining electrode; a finish machining step: adopting a first finish machining electrode to machine a plurality of first guide grooves in the end face of the first structural part, adopting a second finish machining electrode to machine a plurality of second guide grooves in the end face of the second structural part, and defining a first sharp corner machining groove by the first guide grooves and the side wall of the second structural part, a second sharp corner machining groove is defined by the second guide groove and the side wall of the first structural part. And mold-saving polishing treatment is carried out, and a final chip mold part is obtained. According to the invention, the sharp corner meeting the requirement can be processed so as to meet the characteristics and functions of a plastic product.

Description

Technical Field

[0001] This invention relates to the field of mold structure, and specifically to a processing method for chip mold parts capable of processing sharp corners, chip mold parts, and plastic products. Background Technology

[0002] The existing technology requires the processing of a chip-shaped plastic part, which contains continuous M-shaped grooves. However, the industry has high requirements for the shape of these M-shaped grooves. At the central sharp corner, the plastic part feature has a width of 0.1mm, and rounded corners are not acceptable. The existing technology involves direct injection molding using a mold that matches the shape of the chip-shaped plastic part. However, the "M" feature of the mold part cannot be machined to achieve the sharp corner using wire cutting, EDM, or CNC machining centers. The mold part also has a 0.1mm rounded corner at the center of the M, which does not meet the customer's functional requirements for the plastic part. Therefore, the existing mold part needs to be redesigned. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a processing method for chip mold parts capable of processing sharp corners, a chip mold part processed by the processing method, and a plastic product injection molded from the chip mold part.

[0004] The present invention provides a processing method for chip mold parts with sharp corners, comprising the following steps:

[0005] Rough machining step: Machining the first structural component and the second structural component according to the preset shape to form the first structural component preform and the second structural component preform, wherein the first structural component preform and the second structural component preform can be matched with the limiting clearance.

[0006] Finishing electrode preparation steps: Prepare the first finishing electrode and / or the second finishing electrode according to the sharp corner shape of the chip mold part;

[0007] Finishing step: Using a first finishing electrode, several first guide grooves of a certain depth are machined on the end face of the first structural component preform, penetrating the inner and outer walls of the first structural component preform, to form a first structural component with a first guide groove structure;

[0008] And / or,

[0009] A second precision machining electrode is used to machine several second guide grooves of a predetermined depth that penetrate the inner and outer walls of the second structural component preform, forming a second structural component with a second guide groove structure.

[0010] The first guide groove and the side wall of the second structural member form a first sharp-angle machining groove, and the second guide groove and the side wall of the first structural member form a second sharp-angle machining groove;

[0011] Polishing process: Remove the sparks from the first and second structural parts after finishing and polish them to obtain the final chip mold parts.

[0012] Furthermore, in the rough machining step, the mating end faces of the first structural component and the second structural component are circular, and the first structural component is sleeved on the outside of the second structural component.

[0013] Furthermore, in the finishing electrode preparation step, the first finishing electrode includes a circular ring body. The inner surface of the circular ring body is provided with a plurality of first cutting blade units. The cross-section of the first cutting blade unit is an isosceles triangle matching the shape of the first guide groove. The height differs from the thickness of the sidewall of the first structural component by more than 0.2 mm. The blade edge of the first cutting blade unit is set towards the center of the circular ring body.

[0014] Furthermore, the end face of the second structural member is annular and has a hollow portion. The second finishing electrode includes a disc-shaped body that can be clearance-fitted with the inner wall of the second structural member, and a plurality of second cutting blade units disposed on the outer wall of the disc-shaped body. The cross-section of the second cutting blade unit is an isosceles triangle that matches the shape of the second guide groove, and the height differs from the thickness of the side wall of the second structural member by more than 0.2 mm. The blade edge of the second cutting blade unit is positioned towards the center of the annular body.

[0015] Furthermore, the first and second precision-machined electrodes are processed using a CNC machining center and wire EDM.

[0016] Furthermore, in the finishing step, the first structural component is machined using an EDM spark dies in conjunction with the first finishing electrode, and the second structural component is machined using an EDM spark dies in conjunction with the second finishing electrode.

[0017] The present invention also provides a chip mold part, which is processed by the aforementioned processing method for chip mold parts capable of processing sharp corners, and includes a first structural component and a second structural component, wherein the first structural component and the second structural component are clearance-fitted.

[0018] Furthermore, the first structural member and the second structural member are provided with limiting structures, and the first structural member and the second structural member are provided with bases. The limiting structures are a first plane provided on the inner side wall of the base of the first structural member and a second plane provided on the outer side wall of the base of the second structural member. The first longitudinal plane and the second longitudinal plane are fitted together.

[0019] Furthermore, the first guide groove is uniformly disposed on the end face of the first structural member, and the second guide groove is uniformly disposed on the end face of the second structural member. The first guide groove and the second guide groove are staggered. The converging end of the first guide groove is corresponding to the middle part of the second protrusion sidewall between two adjacent second guide grooves, and the converging end of the second guide groove is corresponding to the middle part of the first protrusion sidewall between two adjacent first guide grooves.

[0020] The present invention also provides a plastic article, which is injection molded from the chip mold part. The plastic article has a groove, and the sidewall of the groove has a plurality of sharp corners extending toward the center of the groove. The sharp corners are processed by a first sharp corner processing groove and / or a second sharp corner processing groove. The sharp corner includes a first longitudinal plane disposed at the top and a second longitudinal plane disposed on both sides of the first longitudinal plane. The first longitudinal plane and the second longitudinal plane form a certain angle on the projection of the plastic article body.

[0021] Compared with the prior art, the beneficial effects of the present invention are: by improving the design method, the present invention enables the mold parts of the present invention to be processed to produce sharp corners that meet the requirements, so as to satisfy the characteristics and functions of plastic products. Attached Figure Description

[0022] To more clearly illustrate the solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a flowchart of the processing method of the present invention;

[0024] Figure 2 This is a schematic diagram of the pre-formed first structural component after rough machining.

[0025] Figure 3 This is a schematic diagram of the pre-formed second structural component after rough machining.

[0026] Figure 4 This is a schematic diagram of the structure of the first finishing electrode;

[0027] Figure 5 This is a schematic diagram of the structure of the second finishing electrode;

[0028] Figure 6 A schematic diagram of the finishing structure of the first structural component preform by the first finishing electrode;

[0029] Figure 7 This is a schematic diagram of the finishing structure of the second finishing electrode on the pre-form of the second structural component.

[0030] Figure 8 This is a schematic diagram of the chip mold component structure of the present invention;

[0031] Figure 9 for Figure 8 Enlarged view of section A;

[0032] Figure 10 This is a schematic diagram of the structure of a plastic part;

[0033] Figure 11 for Figure 10 Enlarged view of section B. Detailed Implementation

[0034] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0035] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the present invention provides a method for processing chip mold parts with sharp corners, comprising the following steps:

[0038] Rough machining step: Machining the first structural component and the second structural component according to the preset shape to form the first structural component preform and the second structural component preform, wherein the first structural component preform and the second structural component preform can be matched with the limiting clearance.

[0039] Finishing electrode preparation steps: Prepare the first finishing electrode and / or the second finishing electrode according to the sharp corner shape of the chip mold part;

[0040] Finishing step: Using a first finishing electrode, several first guide grooves of a certain depth are machined on the end face of the first structural component preform, penetrating the inner and outer walls of the first structural component preform, to form a first structural component with a first guide groove structure;

[0041] And / or,

[0042] A second precision machining electrode is used to machine several second guide grooves of a predetermined depth that penetrate the inner and outer walls of the second structural component preform, forming a second structural component with a second guide groove structure.

[0043] The first guide groove and the side wall of the second structural member form a first sharp-angle machining groove, and the second guide groove and the side wall of the first structural member form a second sharp-angle machining groove;

[0044] Polishing process: Remove the sparks from the first and second structural parts after finishing and polish them to obtain the final chip mold parts.

[0045] like Figures 2-11 As shown, in one embodiment of the present invention, the plastic product of the present invention is disc-shaped and is injection molded from the chip mold part. An annular groove needs to be machined on the surface of the disc. The sidewall of the groove has several first sharp angles 501 and second sharp angles 502 extending towards the center of the groove. The first sharp angles 501 and second sharp angles 502 are arranged alternately, forming an M-shaped structure for the entire groove. The first sharp angle 501 is machined by a first sharp angle processing groove (formed by the outer sidewall of the first guide groove 104 and the second structural member 2), and the second sharp angle 502 is machined by a second sharp angle processing groove (formed by the inner sidewall of the second guide groove 204 and the first structural member 1). The first sharp angle 501 includes a first longitudinal plane 5012 disposed at the top and second sharp angles 502 respectively disposed on both sides of the first longitudinal plane 5012. The longitudinal plane 5011, the first longitudinal plane 5012 and the second longitudinal plane 5011 form a certain angle on the projection of the plastic part body. In this example, the angle can be a right angle, an acute angle or an obtuse angle, so that the plastic part of the present invention meets the requirement of no rounded corners at the sharp corners. In this example, the depth of the second longitudinal plane 5011 on both sides of the first longitudinal plane 5012 is 0.61mm, and the width of the first longitudinal plane 5012 is 0.1mm. The depth of the present invention can also be set to other values ​​as needed, all of which can meet the requirement of no rounded corners at the sharp corners. Since the sharp corners of the plastic part of the present invention are very small, the processing difficulty is very high. Through the mold parts of the present invention, this technical obstacle can be overcome, and the injection molded plastic part meets the product characteristics and functional requirements, meets the precision required by customers, and can also enhance the competitiveness of enterprises.

[0046] like Figures 2-9As shown, in the rough machining step, the mating end faces 101 and 201 of the first structural component 1 and the second structural component 2 are both circular, and the first structural component 1 can be sleeved on the outside of the second structural component 2.

[0047] In this example, the second structural component 2 is first machined using CNC machining center and lathe. Figure 3 The shape; the first structural component 1 is machined into the shape using CNC machining centers and lathes. Figure 2 The shape of the mating end faces 101 and 201 is such that the sharp corners to be processed are flat.

[0048] The first structural component 1 includes a first base 102 and a machined body disposed on the first base 102. The base 102 is provided with a first limiting plane 103. The second structural component 2 includes a second base 202 and a machined body disposed on the second base 202. The second base 202 is provided with a second limiting plane 203. The first limiting plane 103 and the second limiting plane 203 are fitted together. The Z-axis assembly position of the first structural component 1 and the second structural component 2 is achieved by the cooperation of the first base 102 and the second base 202. The cooperation of the first limiting plane 103 and the second limiting plane 203 prevents relative twisting and misalignment between the two, thereby making the position controllable after assembly. Of course, the first structural component and the second structural component of the present invention can also adopt other limiting methods, such as buckles, bosses and grooves, etc. for limiting.

[0049] Before the finishing step, a finishing electrode needs to be prepared. In this example, the first finishing electrode 3 includes a circular body 301. The inner surface of the circular body 301 is provided with several first cutting blade units 302. The cross-section of each first cutting blade unit 302 is an isosceles triangle matching the shape of the first guide groove, and its height differs from the thickness of the sidewall of the first structural component by more than 0.2 mm. The cutting edge of each first cutting blade unit 302 is positioned towards the center of the circular body 301. In this example, when setting the first finishing electrode 3, its overall inner diameter is 0.2 mm smaller than the inner hole of the first structural component 1, thus allowing the machining of a sharp corner with a width of 0.1 mm. If the width of the sharp corner changes, the relationship between the inner diameter of the first finishing electrode 3 and the inner hole of the first structural component 1 is adjusted as needed.

[0050] The inner wall 304 of the annular body 301 is also provided with a first boss 303. The first end face 305 of the first boss 303 cooperates with the upper end face of the first structural member 1 to limit the processing depth of the first fine electrode 3, that is, the depth of the first guide groove 104.

[0051] Similarly, in this example, the end face of the second structural member 2 is annular with a hollow portion. The second finishing electrode 4 includes a disc-shaped body 401 that can be clearance-fitted with the inner wall of the second structural member 2, and a plurality of second cutting blade units 402 disposed on the outer wall 404 of the disc-shaped body 401. The cross-section of the second cutting blade unit 402 is an isosceles triangle matching the shape of the second guide groove 204, and the height differs from the thickness of the side wall of the second structural member by more than 0.2 mm. The cutting edge of the second cutting blade unit 402 is oriented towards the center of the annular body. In this example, a second boss 403 is also provided on the outer wall 404. The second end face 405 of the second boss 403 mates with the upper end face of the second structural member 2 to limit the processing depth of the second finishing electrode 4, which is the depth of the second guide groove 204.

[0052] After the design is completed, the first precision electrode 3 and the second precision electrode 4 are then processed by CNC machining center and wire cutting process.

[0053] In the finishing step, the first structural component 1 is machined using an EDM (Electrical Discharge Machining) machine in conjunction with the first finishing electrode 3, and the second structural component 2 is machined using an EDM machine in conjunction with the second finishing electrode 4. Figure 6 and Figure 7 As shown, the final machined part has the following shape. Figure 8 As shown, the final part is prepared by the die-cutting personnel, who eliminate the sparks from the finishing process.

[0054] like Figure 8 and Figure 9 As shown, the chip mold part processed by the present invention includes a first structural component 1 and a second structural component 2, which are fitted together with a clearance. The clearance between the first structural component 1 and the second structural component 2 is less than 0.01 mm, preferably with an accuracy of about 0.005 mm, to avoid slippage. Since the sidewalls of the two components are relatively thin, the clearance fit facilitates disassembly and maintenance, thereby reducing production costs.

[0055] The first guide groove 104 is evenly distributed on the end face of the first structural member 1, and the second guide groove 204 is evenly distributed on the end face of the second structural member 2. The first guide groove 104 and the second guide groove 204 are staggered. The converging tip of the first guide groove 104 corresponds to the middle of the second protrusion sidewall between two adjacent second guide grooves 204, and the converging tip of the second guide groove 204 corresponds to the middle of the first protrusion sidewall between two adjacent first guide grooves. Figure 9 The C region is the structure used to process the two adjacent central apex angles of the "M" feature.

[0056] Of course, as another embodiment of the present invention, this example can only provide the first guide groove 104 to cooperate with the outer side wall of the second structural member to process a single-sided sharp corner. This example can also only provide the second guide groove 204 to cooperate with the inner side wall of the first structural member to process a single-sided sharp corner. The position and cooperation relationship of the first guide groove 104 and the second guide groove 204 can also be set according to actual needs.

[0057] Compared with existing technologies, this invention improves the design method, enabling the injection molding of sharp corners that meet the requirements when processing delicate parts or even tiny parts at the millimeter level. This not only meets functional requirements but also greatly reduces production costs and improves processing efficiency.

[0058] The specific embodiments described above are preferred embodiments of the present invention and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A method for processing chip mold parts with sharp corners, characterized in that, Includes the following steps: Rough machining step: Machining the first structural component and the second structural component according to the preset shape to form the first structural component preform and the second structural component preform, wherein the first structural component preform and the second structural component preform can be matched with the limiting clearance. Finishing electrode preparation steps: Prepare the first finishing electrode and / or the second finishing electrode according to the sharp corner shape of the chip mold part; Finishing step: Using a first finishing electrode, several first guide grooves of a certain depth are machined on the end face of the first structural component preform, penetrating the inner and outer walls of the first structural component preform, to form a first structural component with a first guide groove structure; And / or, A second precision machining electrode is used to machine several second guide grooves of a predetermined depth that penetrate the inner and outer walls of the second structural component preform, forming a second structural component with a second guide groove structure. The first guide groove and the side wall of the second structural member form a first sharp-angle machining groove, and the second guide groove and the side wall of the first structural member form a second sharp-angle machining groove; Polishing process: Remove the sparks from the first and second structural parts after finishing and polish them to obtain the final chip mold parts.

2. The processing method for chip mold parts capable of processing sharp corners according to claim 1, characterized in that: In the rough machining step, the mating end faces of the first structural component and the second structural component are circular, and the first structural component is sleeved on the outside of the second structural component.

3. The processing method for chip mold parts capable of processing sharp corners according to claim 2, characterized in that: In the finishing electrode preparation step, the first finishing electrode includes a circular ring body. The inner surface of the circular ring body is provided with a plurality of first cutting blade units. The cross-section of the first cutting blade unit is an isosceles triangle that matches the shape of the first guide groove. The height of the first cutting blade unit differs from the thickness of the side wall of the first structural component by more than 0.2 mm. The blade edge of the first cutting blade unit is set towards the center of the circular ring body.

4. The processing method for chip mold parts capable of processing sharp corners according to claim 3, characterized in that: The end face of the second structural component is annular and has a hollow portion. The second finishing electrode includes a disc-shaped body that can be clearance-fitted with the inner wall of the second structural component, and a plurality of second cutting blade units disposed on the outer wall of the disc-shaped body. The cross-section of the second cutting blade unit is an isosceles triangle that matches the shape of the second guide groove, and the height differs from the thickness of the side wall of the second structural component by more than 0.2 mm. The blade edge of the second cutting blade unit is set towards the center of the annular body.

5. The processing method for chip mold parts capable of processing sharp corners according to claim 4, characterized in that: The first and second precision-machined electrodes are manufactured using a CNC machining center and wire EDM.

6. The processing method for chip mold parts capable of processing sharp corners according to claim 5, characterized in that: In the finishing step, the first structural component is machined using an EDM spark dies in conjunction with the first finishing electrode, and the second structural component is machined using an EDM spark dies in conjunction with the second finishing electrode.

7. A chip mold part, manufactured by the processing method for chip mold parts capable of processing sharp corners as described in any one of claims 1-6, characterized in that: It includes a first structural component and a second structural component, which are clearance-fitted.

8. The chip mold part according to claim 7, characterized in that: The first structural component and the second structural component are provided with a limiting structure. The first structural component and the second structural component are provided with a base. The limiting structure is a first plane provided on the inner side wall of the base of the first structural component and a second plane provided on the outer side wall of the base of the second structural component. The first longitudinal plane and the second longitudinal plane are fitted together.

9. The chip mold part according to claim 7, characterized in that: The first guide groove is evenly distributed on the end face of the first structural member, and the second guide groove is evenly distributed on the end face of the second structural member. The first guide groove and the second guide groove are staggered. The converging end of the first guide groove is corresponding to the middle part of the second protrusion sidewall between two adjacent second guide grooves, and the converging end of the second guide groove is corresponding to the middle part of the first protrusion sidewall between two adjacent first guide grooves.

10. A plastic article, injection molded from the chip mold part according to any one of claims 7-9, characterized in that: The plastic part has a groove, and the sidewall of the groove has several sharp corners extending toward the center of the groove. The sharp corners are formed by the first sharp corner processing groove and / or the second sharp corner processing groove. The sharp corners include a first longitudinal plane set at the top and a second longitudinal plane respectively set on both sides of the first longitudinal plane. The first longitudinal plane and the second longitudinal plane form a certain angle on the projection of the plastic part body.

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