A mold part and a high-precision positioning machining method thereof

Abstract

The application provides a mold part and a high-precision positioning machining method thereof, and relates to the technical field of mold machining. The mold part and the high-precision positioning machining method thereof comprise a mold main body, a plurality of hot nozzle holes are evenly arranged at the periphery of the upper surface of the mold main body, a precision positioning hole is arranged at each corner of the upper surface of the mold main body, a glue positioning hole is arranged at the middle position of the side edge of the upper surface of the mold main body, and a clearance positioning hole is fixedly arranged at the center of the upper surface of the mold main body. The milling machine is combined with the EDM machining mode, and the whole mold part is machined by the milling machine multiple times. A margin is left in each machining process, which is beneficial to leaving sufficient operation space for subsequent polishing and etching machining. After the machining is completed, the margin is removed. While ensuring the precision of the whole mold part, the machining difficulty of the related operators in the machining process is reduced, and the high-precision positioning machining of the mold part is realized.

Description

Technical Field

[0001] This invention relates to the field of mold processing technology, specifically to a mold part and its high-precision positioning processing method. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are usually made using rubber injection molding and plastic injection molding. The process involves using plastic molds to make plastic products of various shapes. The existing injection molding process usually involves the injection molding machine and the mold working together. Therefore, the existing injection molding process requires high precision for the mold parts.

[0003] Most existing mold parts are made by combining upper and lower molds with cavities. If the gas inside the mold parts cannot be discharged during use, it will cause trapped air, which will affect the injection molding results. At the same time, most existing mold parts are formed by stamping in one go by a punch press. It is difficult to effectively guarantee the overall precision of the mold and the position of each opening. Moreover, the finishing process requires high skill from the user and is difficult to operate. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a mold part and its high-precision positioning and machining method, which solves the problems that existing mold parts and machining methods have high requirements for machining accuracy, high requirements for operator skill, high operational difficulty, and poor overall practicality of mold parts in actual operation.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a mold part and its high-precision positioning processing method, comprising a mold body, wherein multiple hot nozzle holes are equally spaced at the four edges of the upper surface of the mold body, precision positioning is provided at the four corners of the upper surface of the mold body, a glue position is provided at the middle position of one edge of the upper surface of the mold body, and a clearance position is fixedly provided at the center of the upper surface of the mold body;

[0008] The outer surfaces of both sides of the mold body are fixed with coarse holes at the middle positions of the front and rear ends. The front end and one side of the upper surface of the mold body are provided with venting grooves. Multiple through-faces are provided at the edges of the upper surface of the mold body. A threaded water channel is provided at the center of the upper surface of the mold body. Screw holes are provided on both sides of the upper surface of the mold body at the front and rear ends.

[0009] A mold part and its high-precision positioning and machining method, specifically including the following steps:

[0010] S1. Rough machining on a milling machine

[0011] Select raw materials of appropriate size, fix the raw materials to the milling machine processing position with a fixture, roughen the shape of the mold parts with the milling machine, process the rough holes, screw holes, and threaded water channels, and roughen the hot nozzle hole on the back.

[0012] S2. Finishing of the outer surface

[0013] The outer four sides and bottom surface of the mold part are precision machined using a milling machine, and the outer four sides and bottom surface are machined to the required position in the drawing.

[0014] S3. Surface finishing

[0015] The mold parts are machined on the upper surface using a milling machine, including the glue area, venting groove, hot nozzle hole, clearance area, and contact surface. The hot nozzle hole is machined on the back side.

[0016] S4.EDM processing

[0017] The adhesive area is processed by EDM. The adhesive area coplanar with the contact surface needs to be marked with VDI30 pattern according to the drawing requirements. The electrode EDM is processed according to the quantity.

[0018] S5. Outer shaping

[0019] The overall shape of the mold parts is trimmed by a milling machine, and the four corners need to be chamfered by a milling machine;

[0020] S6. Surface Polishing

[0021] Polish the rubber surfaces of the mold parts. Polish the surfaces to be textured to 800 grit sandpaper according to the drawing requirements. Take care to protect the textured surfaces and do not polish them.

[0022] S7. Residual amount removal

[0023] The excess material on the top surface of the mold parts is removed by grinding, and the upper surface of the mold parts is machined to the required dimensions according to the drawing.

[0024] S8. Size Inspection

[0025] After processing, the mold parts are removed for dimensional inspection. Once the inspection is passed, the external etching is performed.

[0026] Preferably, in step S2, when the outer shape is finished, the top surface needs to be left with a margin of 0.05mm.

[0027] Preferably, in step S3, a margin of 0.02 mm needs to be left for subsequent texturing processing on the adhesive surface.

[0028] Preferably, in step S3, a margin of 0.015mm is required in the adhesive surface processing to allow space for subsequent polishing.

[0029] Preferably, in step S4, an additional 0.015mm needs to be left during EDM processing to allow space for subsequent polishing.

[0030] Preferably, in step S7, the top surface of the adhesive part is ground with a tolerance of 0.05mm, while other processes do not have a tolerance. After completion, attention should be paid to checking the dimensions.

[0031] (III) Beneficial Effects

[0032] This invention provides a mold part and a high-precision positioning and machining method thereof. It has the following beneficial effects:

[0033] 1. This invention provides a mold part and its high-precision positioning machining method. Compared with existing mold part machining methods, this mold part machining method adopts a milling machine combined with EDM machining. The mold part is machined multiple times by the milling machine, leaving a margin in each machining process. This is beneficial to leave sufficient operating space for subsequent polishing and etching. After machining, the margin is removed. While ensuring the overall accuracy of the finished mold part, the machining difficulty of the relevant operators is reduced, and high-precision positioning machining of the mold part is achieved.

[0034] 2. This invention provides a mold part and its high-precision positioning and processing method. Compared with existing mold part processing methods, this mold part processing method uses EDM (Electronic Discharge Machining) to process the position of the glue position. By using a continuously moving fine metal wire to perform pulse spark discharge to remove metal and cut the shape of the glue position, it is beneficial to ensure the overall processing accuracy of the process. It is also convenient for users to accurately position the glue position before processing, thus improving the overall processing effect of the processing method.

[0035] 3. This invention provides a mold part and its high-precision positioning and processing method. Compared with existing part molds, this part mold has threaded water channels and venting grooves on its surface, which helps users to more effectively complete the blow molding of products when using the mold part. The venting grooves release the gas inside the mold during the blow molding process, prevent the formation of trapped gas in the mold, and improve the blow molding effect of the product, thus improving the overall practicality of the mold part. Attached Figure Description

[0036] Figure 1 This is an isometric schematic diagram of the present invention;

[0037] Figure 2 This is a top view of the present invention;

[0038] Figure 3 This is a front view schematic diagram of the present invention;

[0039] Figure 4 This is a side view of the present invention.

[0040] The components include: 1. Mold body; 2. Hot nozzle hole; 3. Precision positioning; 4. Glue position; 5. Clearance position; 6. Coarse hole; 7. Venting groove; 8. Through-face; 9. Threaded water channel; 10. Screw hole. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example:

[0043] like Figure 1-4 As shown, this embodiment of the invention provides a mold part and its high-precision positioning processing method, including a mold body 1, which is conducive to realizing the basic use function of the mold part. Multiple hot nozzle holes 2 are evenly spaced around the edges of the upper surface of the mold body 1, which is convenient for users to connect the mold to the hot nozzle for injection molding. Precision positioning 3 is provided at the four corners of the upper surface of the mold body 1, which is convenient for users to close the upper and lower molds. A glue position 4 is provided in the middle of one edge of the upper surface of the mold body 1. An clearance position 5 is fixedly provided at the center of the upper surface of the mold body 1, which is conducive to further improving the basic use effect of the mold.

[0044] Coarse holes 6 are fixedly provided on the outer surfaces of both sides of the mold body 1 at the middle positions of the front and rear ends, which is conducive to the user connecting the mold parts with other devices. Venting grooves 7 are provided on the front end and one side of the upper surface of the mold body 1, which is conducive to improving the venting effect of the mold and preventing air entrapment. Multiple through surfaces 8 are provided at the edges of the upper surface of the mold body 1. Threaded water channels 9 are provided at the center of the upper surface of the mold body 1. Screw holes 10 are provided on both sides of the upper surface of the mold body 1 at the front and rear ends, which is conducive to further improving the connection effect of the mold.

[0045] A mold part and its high-precision positioning and machining method, specifically including the following steps:

[0046] S1. Rough machining on a milling machine

[0047] Select raw materials of appropriate size, fix the raw materials to the milling machine processing position with a fixture, and roughen the shape of the mold parts with the milling machine. Machining rough hole 6, screw hole 10, and threaded water channel 9 are completed. Roughening the hot nozzle hole 2 on the back is also helpful for the operator to make a preliminary positioning of the overall appearance of the mold parts and to make it easier for the operator to determine the processing accuracy.

[0048] S2. Finishing of the outer surface

[0049] The outer four sides and bottom surface of the mold part are precision machined by milling machine. The outer four sides and bottom surface are machined in accordance with the requirements of the drawing. This helps to initially determine the shape of the mold part and facilitates subsequent precision machining of its surface structure.

[0050] S3. Surface finishing

[0051] The positions of the glue area 4, venting groove 7, hot nozzle hole 2, clearance position 5 and contact surface 8 on the upper surface of the mold part are machined by milling machine, and the hot nozzle hole 2 is machined on the back side, which is beneficial to perform preliminary machining and positioning of the various structures on the surface of the mold part.

[0052] S4.EDM processing

[0053] The adhesive position 4 is processed by EDM. The adhesive position 4, which is coplanar with the contact surface 8, needs to be marked with VDI30 pattern according to the drawing requirements. The electrode EDM is processed according to the number, which is conducive to further precise processing and positioning of the adhesive position 4 and improving the processing effect.

[0054] S5. Outer shaping

[0055] The overall shape of the mold parts is trimmed by milling, and the four corners need to be chamfered by milling, which helps to further improve the fineness of the finished product's appearance.

[0056] S6. Surface Polishing

[0057] Polish all four sides of the mold parts to be etched. Polish the surface to be etched to 800 grit sandpaper according to the drawing requirements. Take care to protect the surface to be etched and do not polish it, as this will help improve the appearance of the finished product.

[0058] S7. Residual amount removal

[0059] Removing excess material from the top surface of mold parts using a grinding machine and machining the upper surface of mold parts to the required dimensions according to the drawings helps ensure the precision of the finished mold product.

[0060] S8. Size Inspection

[0061] After processing, the mold parts are removed and their dimensions are inspected. Once the inspection is passed, external etching is performed to ensure the quality of the finished product.

[0062] In S2, when the outer shape is finished, a 0.05mm allowance needs to be temporarily left on the top surface. In S3, a 0.015mm allowance needs to be left for the machining of the four sides of the glue area to allow space for subsequent polishing. In S4, a further 0.015mm allowance needs to be left for the EDM machining to allow space for subsequent polishing. In S7, a 0.05mm allowance is left on the top surface of the four sides of the glue area during grinding. No allowance is left for other processes. After completion, pay attention to the dimension inspection to ensure sufficient operating space for subsequent polishing and etching. After the machining is completed, remove the excess material. While ensuring the overall accuracy of the finished mold part, the machining difficulty of the relevant operators is reduced, and high-precision positioning machining of the mold part is achieved.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision positioning and machining method for mold parts, characterized in that: The mold part includes a mold body (1), and multiple hot nozzle holes (2) are equally spaced around the edges of the upper surface of the mold body (1). Precision positioning (3) is provided at each of the four corners of the upper surface of the mold body (1). A glue position (4) is provided in the middle of one side edge of the upper surface of the mold body (1). A clearance position (5) is fixedly provided at the center of the upper surface of the mold body (1). The outer surfaces of both sides of the mold body (1) are fixed with coarse holes (6) at the middle positions of the front and rear ends. The front end and one side of the upper surface of the mold body (1) are provided with exhaust grooves (7). Multiple through surfaces (8) are provided at the edges of the upper surface of the mold body (1). Threaded water channels (9) are provided at the center of the upper surface of the mold body (1). Screw holes (10) are provided on both sides of the upper surface of the mold body (1) at the front and rear ends. The high-precision positioning and machining method specifically includes the following steps: S1. Rough machining on a milling machine Select raw materials of appropriate size, fix the raw materials to the milling machine processing position by clamping, roughen the shape of the mold parts by milling, process the rough hole (6), screw hole (10), and threaded water channel (9) in place, and roughen the hot nozzle hole (2) on the back. S2. Finishing of the outer surface The outer four sides and bottom surface of the mold part are precision machined using a milling machine, and the outer four sides and bottom surface are machined to the required position in the drawing. S3. Surface finishing The mold parts are machined by milling machine to process the glue position (4), vent groove (7), hot nozzle hole (2), clearance position (5) and contact surface (8) on the upper surface of the mold parts, and the hot nozzle hole (2) is machined on the back. S4.EDM processing The adhesive position (4) is processed by EDM. The adhesive position (4) that is coplanar with the contact surface (8) needs to be marked with VDI30 pattern according to the drawing requirements. The electrode EDM is processed according to the number. S5. Outer shaping The overall shape of the mold parts is trimmed by a milling machine, and the four corners need to be chamfered by a milling machine; S6. Surface Polishing Polish the glue area (4) of the mold part. Polish the surface to be etched to 800 grit sandpaper according to the drawing requirements. Take care to protect the surface to be etched and do not polish it. S7. Residual amount removal The excess material on the top surface of the mold parts is removed by grinding, and the upper surface of the mold parts is machined to the required dimensions according to the drawing. S8. Size Inspection After processing, the mold parts are removed for dimensional inspection. Once the inspection is passed, the external etching is performed.

2. The high-precision positioning and machining method for mold parts according to claim 1, characterized in that: In step S2, when the outer shape is being finished, a 0.05mm margin needs to be left on the top surface.

3. The high-precision positioning and machining method for mold parts according to claim 1, characterized in that: In S3, the adhesive part (4) surface needs to be left with a margin of 0.02mm to allow space for subsequent etching.

4. The high-precision positioning and machining method for mold parts according to claim 1, characterized in that: In S3, the adhesive part (4) surface needs to be left with a margin of 0.015mm to allow space for subsequent polishing.

5. A high-precision positioning and machining method for mold parts according to claim 3, characterized in that: In step S4, an additional 0.015mm needs to be left for subsequent polishing during EDM processing.

6. The high-precision positioning and machining method for mold parts according to claim 1, characterized in that: In step S7, a margin of 0.05mm is left on the top surface of the mold part, while no margin is left in other processes. After completion, pay attention to the dimension inspection.

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