CN118123150A - Processing method, processing device and injection mold - Google Patents

Abstract

The invention relates to the technical field of injection mold processing, and discloses a processing method, a device and an injection mold, wherein the processing method comprises the following steps: milling the blank material into the shape of the injection mold by a machine tool; coarsely machining a first appearance rubber position surface of the appearance of the injection mold by a first electrode; electrode engraving is carried out on a first character area on the first appearance rubber position surface by engraving electrode thickening, a first character is formed, and the machining allowance of the first character and the machining allowance of the first appearance rubber position surface are consistent; the second electrode is used for finishing the first appearance glue surface and the whole first character in place. The processing method reserves consistent processing allowance for the first appearance rubber surface and the first character, so that the allowance of the second electrode is uniform when the second electrode is used for integrally finishing the first appearance rubber surface and the first character, the surface loss of the second electrode is consistent when the second electrode is processed in a discharging mode, the stability and the uniformity of the discharging current of the second electrode are ensured, and the condition that stamping is generated at the root of the first character due to uneven reservation of the processing allowance is avoided.

Description

Processing method, processing device and injection mold

Technical Field

The invention relates to the technical field of injection mold processing, in particular to a processing method and device and an injection mold.

Background

The injection mold is used for injection molding of products, such as mobile phone shells, flat panel shells and the like, in the molding requirements of some products, special characters (letters, patterns and the like) need to be formed on the surfaces of the products so as to form special marks of the products, and the requirements of personalized appearance of the products are met, so that corresponding character patterns need to be processed on the injection mold.

In the prior art, CNC (computer numerical control) and electric spark combined machining are generally adopted for machining an injection mold, the appearance of the injection mold is generally machined through CNC on blank materials, and then the electric spark machining is utilized for carrying out electrode machining and character pattern engraving on the appearance rubber position surface of the injection mold.

Disclosure of Invention

In view of the above, the invention provides a processing method, a device and an injection mold, which are used for solving the problems that electrode loss is uneven during electric spark discharge processing and stamping is easy to generate at the root of a character pattern due to uneven processing allowance of a character pattern and an appearance rubber surface during processing of the existing injection mold, thereby influencing the injection molding quality of a product.

The first aspect of the invention provides a processing method applied to an injection mold, comprising the following steps: milling the blank material into the shape of the injection mold by a machine tool; coarsely machining a first appearance rubber position surface of the appearance of the injection mold by a first electrode; electrode engraving is carried out on a first character area on the first appearance rubber position surface by engraving electrode thickening, a first character is formed, and the machining allowance of the first character and the machining allowance of the first appearance rubber position surface are consistent; the second electrode is used for finishing the first appearance glue surface and the whole first character in place.

The processing method comprises the steps of firstly, preliminarily processing the appearance of an injection mold through a machine tool, wherein the appearance comprises a first appearance rubber position surface and a first character area, then, respectively carrying out rough processing on the first appearance rubber position surface and the first character area through a first electrode and an engraving electrode, enabling the processing allowance of the first appearance rubber position surface and the first appearance rubber position surface to be consistent, and then, carrying out integral fine processing on the first appearance rubber position surface and the first character area by utilizing a second electrode to carry out fine processing on the first appearance rubber position surface and the first character area in place.

In an alternative embodiment, the machine tool mills blank material out of the shape of the injection mold, comprising: milling an injection molding cavity of an injection mold on the blank by a machine tool; finishing the sealing surface and the matching surface of the injection molding cavity in place; and (3) roughly machining the first appearance rubber position surface of the injection molding cavity, reserving a first machining allowance, and machining to form a convex first character area on the first appearance rubber position surface.

In an alternative embodiment, the first electrode roughening the first appearance molding surface of the injection mold comprises: the first electrode is formed into a rough shape, the first appearance rubber surface is roughly machined, and a second machining allowance is reserved, wherein the second machining allowance is smaller than the first machining allowance.

In an alternative embodiment, the first machining allowance is 0.04mm to 0.05mm and the second machining allowance is 0.01mm to 0.03mm.

In an alternative embodiment, the first carving margin is arranged from the length edge of the first character to the length edge of the first character area and from the width edge of the first character to the width edge of the first character area; and/or the height of the first character is consistent with the height of the first character area.

In an optional embodiment, before the step of engraving the first character area on the first appearance glue level surface by using the engraving electrode for coarsening, the method further includes: the top surface of the first character area is polished.

In an alternative embodiment, the processing method further comprises: roughly machining a second appearance rubber position surface of the appearance of the injection mold by a machine tool, forming a second character area on the second appearance rubber position surface, enabling the top surface of the second character area to be level with the second appearance rubber position surface, and reserving a third machining allowance; and (3) integrally finishing the second appearance glue position surface and the second character area by the integral electrode finishing, and forming a second character in the second character area.

In an alternative embodiment, the second engraving margin is provided from the length edge of the second character to the length edge of the second character area and from the width edge of the second character to the width edge of the second character area.

In an alternative embodiment, after the step of milling the blank material out of the injection mold by the machine tool, the method further includes: and the machine tool performs angle cleaning treatment on the appearance of the injection mold.

A second aspect of the present invention provides a processing apparatus to which the processing method of the present invention is applied, the processing apparatus comprising: the machine tool is suitable for milling blank materials out of the shape of the injection mold; the first electrode is suitable for rough machining of the first appearance glue position surface; the engraving electrode is suitable for roughly engraving the first character area and forming a first character; and the second electrode is suitable for integrally finishing the first appearance glue surface and the first character in place.

The third aspect of the invention provides an injection mold which is processed by the processing method or the processing device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of main steps of a processing method of an injection mold according to an embodiment of the present invention;

FIG. 2 is a flowchart showing the detailed steps of a method for processing an injection mold according to an embodiment of the present invention;

FIG. 3 is a flow chart showing part of steps of a method for processing an injection mold according to an embodiment of the present invention;

FIG. 4 is a schematic view of an injection mold according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the structure of the back of an injection molded product by an injection mold according to an embodiment of the present invention;

FIG. 6 is a schematic diagram showing the front structure of an injection molded product by an injection mold according to an embodiment of the present invention;

FIG. 7 is a schematic view of a machine tool for machining an injection mold according to an embodiment of the present invention;

FIG. 8 is a schematic view of a first electrode to injection mold processing structure according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a first electrode according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a structure of an engraving electrode for processing a first character area according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a carved electrode according to an embodiment of the present invention;

FIG. 12 is an enlarged schematic view of the first character engraved by the engraving electrode according to the embodiment of the present invention;

FIG. 13 is a schematic diagram of a second electrode according to an embodiment of the present invention;

FIG. 14 is a schematic view of a second appearance adhesive surface after machining according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of an overall structure of an overall electrode for integrally processing a second appearance adhesive surface and a second character area according to an embodiment of the present invention;

FIG. 16 is a schematic view showing the structure of the whole electrode according to the embodiment of the invention;

Fig. 17 is a schematic structural diagram of a second appearance adhesive surface after integral electrode processing according to an embodiment of the present invention.

Description of the reference numerals

100. A rear mold; 11. an injection molding cavity; 111. a first appearance rubber surface; 112. a first character area; 1121. a first character; 113. a second appearance glue level; 114. a second character region; 1141. a second character; 200. a product;

10. a machine tool; 20. a first electrode; 201. a first keep-away area; 202. a second keep-away area; 30. engraving an electrode; 40. a second electrode; 50. and an integral electrode.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Embodiments of the present invention are described below with reference to fig. 1 to 17.

The injection mold is used for injection molding of the product 200, and the principle is that the colloid is poured into an injection cavity 11 of the injection mold, and the product 200 with the same size and shape as the injection cavity 11 can be formed after the colloid is solidified and shaped. By way of example, the product 200 may be a cell phone case, tablet housing, or the like.

As shown in fig. 4 to 6, in general, an injection mold includes a front mold and a rear mold 100, each of the front mold and the rear mold 100 is provided with an injection cavity 11, the front mold is mainly used for injection molding to form a front structure of a product 200, the rear mold 100 is mainly used for injection molding to form a rear structure of the product 200, the front mold and the rear mold 100 are butt-sealed to form a closed injection cavity 11, and a gel is poured therein to form the front and rear structures of the product 200.

In the formation of some products 200, special characters (letters or patterns, etc.) are required to be formed on the back surface structure of the product 200 to form the unique mark of the product 200, so as to meet the requirement of the personalized appearance of the product 200, which requires that the corresponding character patterns are also required to be processed on the back mold 100 of the injection mold.

In this embodiment, the rear mold 100 includes a first appearance glue level 111 and a second appearance glue level 113, the first appearance glue level 111 is injection molded into a large appearance surface on the back surface structure of the product 200, the second appearance glue level 113 is injection molded into a small appearance surface on the back surface structure of the product 200, and a first character 1121 is provided on the first appearance glue level 111, and a second character 1141 is provided on the second appearance glue level 113 to form the first character 1121 on the large appearance surface on the back surface structure of the injection molded product 200 and the second character 1141 on the small appearance surface.

The existing machining mode of the rear mold 100 generally adopts CNC (computer numerical control) machining and electric spark combined machining, and the CNC machining principle is to control the machine tool 10 to cut along a designated path through a pre-written machining program so as to realize the machining of a workpiece; the principle of electric spark machining is to remove redundant metal based on the electric corrosion phenomenon during pulse spark discharge between a tool and a workpiece (positive electrode and negative electrode) so as to meet the preset machining requirements on the size, shape and surface quality of the workpiece.

Generally, the rear mold 100 is first rough machined through CNC and a certain machining allowance is reserved, and then the whole rear mold 100 is finish machined in place through electric spark machining, so that the loss is large during electric spark machining due to the fact that the number of corners is large, and stamping is easily generated at the root of a character due to the fact that the machining allowance of the rubber surface of the character and the appearance is uneven, and therefore the injection molding quality of the product 200 is affected.

Based on the defects of the processing manner, an embodiment of the invention discloses a processing method, which is applied to an injection mold, as shown in fig. 1, and comprises the following steps: the machine tool 10 mills the blank material out of the appearance of the injection mold, the first electrode 20 is opened and coarsely processed on the first appearance rubber surface 111 of the appearance of the injection mold, the engraving electrode 30 is opened and coarsely processed on the first character area 112 on the first appearance rubber surface 111 to form a first character 1121, the machining allowance of the first character 1121 and the machining allowance of the first appearance rubber surface 111 are consistent, and the second electrode 40 is opened and finely processed on the first appearance rubber surface 111 and the first character 1121 in place.

The processing method of the embodiment includes that firstly, the appearance of an injection mold is primarily processed through a machine tool 10, the appearance comprises a first appearance rubber surface 111 and a first character area 112, then, rough processing is respectively carried out on the first appearance rubber surface 111 and the first character area 112 through a first electrode 20 and an engraving electrode 30, the processing allowance of the first appearance rubber surface 111 is consistent with that of the first appearance rubber surface 1121, then, the second electrode 40 is used for finishing the whole first appearance rubber surface 111 and the first character 1121 in place, and because the processing method carries out rough processing on the first appearance rubber surface 111 and the first character area 112 respectively, and consistent processing allowance is reserved, the allowance is uniform when the second electrode 40 carries out finish processing on the whole first appearance rubber surface 111 and the first character 1121, the surface loss of the second electrode 40 is consistent when the second electrode 40 carries out discharge processing, the stability and the uniformity of the discharge current of the second electrode 40 are ensured, and the situation that stamping is generated at the root of the first character 1121 due to uneven reservation of the processing allowance is avoided.

As shown in fig. 2 and 7, the machine tool 10 mills blank material out of the shape of an injection mold, including: the machine tool 10 mills an injection molding cavity 11 of the injection mold on the blank, finish-machines a sealing surface and a matching surface of the injection molding cavity 11 in place, roughly machines a first appearance rubber position surface 111 of the injection molding cavity 11, leaves a first machining allowance, and machines a protruding first character area 112 on the first appearance rubber position surface 111.

The method comprises the steps of milling an injection molding cavity 11 of an injection mold (specifically, a rear mold 100) on a blank through a machine tool 10, finishing a sealing surface and a matching surface of the injection molding cavity 11 in place through the machine tool 10, namely, leaving no machining allowance, roughly machining a first appearance rubber surface 111 of the injection molding cavity 11 through the machine tool 10, leaving a first machining allowance for subsequent electrode machining, and machining a first protruded character area 112 on the first appearance rubber surface 111 so as to facilitate machining of a first character 1121.

It should be noted that, the molding surface of the injection molding cavity 11 may be a surface that prevents the glue from flowing out of the injection molding cavity 11 during injection molding, including but not limited to a side wall surface of the injection molding cavity 11, the first appearance glue site surface 111 may be a surface that may form a large appearance surface of the product 200 during injection molding, including but not limited to a bottom surface of the injection molding cavity 11, and the mating surface is a surface connected between the molding surface and the first appearance glue site surface 111.

Specifically, the machine tool 10 is a numerical control machine tool 10, and can process blank materials according to a preset program to form the outer shape of the rear mold 100 in the injection mold on the blank. It should be noted that, the preset program is a computer program, and the processing path of the machine tool 10 can be controlled by introducing the computer program into the controller of the machine tool 10, so as to process the shape of the preset injection mold.

In this embodiment, the first appearance rubber surface 111 is rough machined by the machine tool 10, and a first machining allowance is reserved, so that the overall machining allowance of the first appearance rubber surface 111 after being machined by the machine tool 10 is uniform, the first character 1121 is not required to be machined in the machining step of the machine tool 10, only the first character area 112 which is convenient for machining the first character 1121 is formed in the first appearance rubber surface 111, and the machining difficulty of the machine tool 10 is reduced.

A protruding first character area 112 is formed on the first appearance glue level 111, that is, the top surface of the first character area 112 is higher than the first appearance glue level 111, so that the formed first character 1121 is higher than the first appearance glue level 111, and after injection molding, a concave character pattern can be formed on the back structure of the product 200.

Further, after the step of milling the blank material out of the injection mold by the machine tool 10, the method further comprises: the machine tool 10 performs corner cleaning processing on the appearance of the injection mold. After the machine tool 10 mills the appearance of the injection mold, the appearance of the injection mold is further subjected to corner cleaning treatment, so that the theoretical value and the actual value of the first machining allowance reserved after the machine tool 10 roughly machines the first appearance rubber surface 111 can be ensured to be consistent, errors are reduced, and uneven electrode loss and stamping caused by inconsistent allowance in subsequent electrode discharge machining are avoided.

As shown in fig. 8 and 9, the first electrode 20 is formed by roughening a first appearance molding surface 111 of the injection mold, including: the first electrode 20 is roughened to the first appearance rubber surface 111 and to leave a second machining allowance, which is smaller than the first machining allowance.

When the machine tool 10 is not in place or the first appearance glue surface 111 needs spark line discharge machining to form a corresponding pattern surface, the first appearance glue surface 111 can be further rough machined by using the arranged first electrode 20, and a second machining allowance for subsequent machining is reserved, so that the electrode machining of the first appearance glue surface 111 is further realized.

Specifically, the external shape and size of the first electrode 20 are matched with those of the first appearance glue site surface 111, so that rough electrode processing is performed on the whole first appearance glue site surface 111 through the first electrode 20.

Further, the first electrode 20 is provided with a first void area 201, the first void area 201 is suitable for corresponding to the first character area 112, and is used for avoiding the first character area 112, that is, the first electrode 20 is used for avoiding the position of the first character area 112 when the first appearance rubber surface 111 is rough machined, only the whole first appearance rubber surface 111 is rough machined, and the first machining allowance reserved for the first appearance rubber surface 111 is consistent, so that the overall discharge stability and uniformity of the first electrode 20 in the step are ensured.

In this embodiment, the shape and size of the first avoidance area 201 are matched with the shape and size of the first character area 112, so as to avoid the first character area 112 completely, and ensure the complete processing of the area of the first appearance glue level surface 111 except the first character area 112.

Preferably, the first machining allowance is 0.04 mm-0.05 mm, and the second machining allowance is 0.01 mm-0.03 mm.

Illustratively, the first tooling allowance may be 0.04mm or 0.05mm and the second tooling allowance may be 0.01mm, 0.02mm or 0.03mm. After the machine tool 10 is finished, a machining allowance of 0.05mm can be reserved on the first appearance rubber surface 111, and the first electrode 20 performs rough machining on the first appearance rubber surface 111, then etches away 0.02mm, and a machining allowance of 0.03mm is reserved.

Of course, in other embodiments, specific values of the first machining allowance and the second machining allowance may be set as needed as long as the second machining allowance is satisfied to be smaller than the first machining allowance.

As shown in fig. 10 and 11, the engraving electrode 30 is provided with a pattern conforming to the first character 1121 to etch away an unnecessary portion of the first character area 112 by the discharge of the engraving electrode 30, thereby forming the first character 1121 on the remaining portion of the first character area 112.

In this embodiment, since the machining allowance of the first character 1121 is identical to that of the first appearance rubber surface 111, the second machining allowance is also reserved for the first character 1121 after the machining of the engraving electrode 30 is completed, so that the machining in the subsequent step is facilitated. The machining allowance reserved for the first character 1121 may be 0.03mm.

As shown in fig. 12, in the present embodiment, the first character region 112 is tetragonal in shape, and its length and width are set according to the required length and width of the first character 1121, specifically, the length and width dimensions not smaller than the first character 1121, so that the first character 1121 can be molded in the first character region 112, and the height of the first character region 112 and the height of the first character 1121 remain the same.

In the present embodiment, the first carving margin is provided from the length edge of the first character 1121 to the length edge of the first character region 112, and from the width edge of the first character 1121 to the width edge of the first character region 112. By providing the first engraving margin between the edge of the first character 1121 and the edge of the first character region 112, the error in machining the machine tool 10 and the subsequent engraving electrode 30 can be reduced, and even if there is machining loss on the edge of the first character region 112, the machining of the first character 1121 can be performed in the first character region 112 in the remaining size, and the integrity of the machining of the length and width edges of the first character 1121 can be ensured.

The first engraving margin may be, for example, specifically 0.2mm, i.e., the length and width edges of the first character 1121 to the length and width edges of the first character area 112 are provided with a margin of 0.2 mm. Of course, in other embodiments, the first engraving margin may be set as desired.

The height of the first character 1121 coincides with the height of the first character area 112. I.e., the machining stage of machine tool 10 machines the height of first character area 112 in place to be equal to the height of first character 1121.

Further, before the step of engraving the first character area 112 on the first appearance glue site 111 by the engraving electrode 30, the method further comprises: the top surface of the first character area 112 is polished. The top surface of the first character region 112 is polished before the engraving electrode 30 is processed, so that the top surface of the first character 1121 formed by processing is smooth, smoothness is improved, and damage to the first character 1121 can be reduced compared with a mode of engraving before polishing.

Specifically, the top surface of the first character area 112 may be ground and polished by a grinder or polisher.

As shown in fig. 13, the second electrode 40 is also provided with a pattern identical to the first character 1121, and when the second electrode 40 discharges, the first appearance glue level 111 and the second machining allowance of the first character 1121 can be simultaneously etched away to finish the whole of the first appearance glue level 111 and the second machining allowance of the first character 1121 in place, and meanwhile, the discharge stability and uniformity of the second electrode 40 are good because the machining allowance of the first appearance glue level 111 and the machining allowance of the first character 1121 are identical.

As shown in fig. 3, 7, and 14 to 17, as a preferred technical solution of the present embodiment, the processing method further includes: the machine tool 10 roughly processes a second appearance rubber position surface 113 of the appearance of the injection mold, a second character area 114 is formed on the second appearance rubber position surface 113, the top surface of the second character area 114 is flush with the second appearance rubber position surface 113, and a third machining allowance is reserved; the integral electrode 50 is finished to integrally finish the second appearance glue site 113 and the second character area 114 in place and form a second character 1141 in the second character area 114.

In the above arrangement, the second appearance glue level 113 is first rough machined by the machine tool 10, the second character area 114 is formed on the second appearance glue level 113, the top surface of the second character area 114 is flush with the second appearance glue level 113, then the integral electrode 50 is finished to finish the whole second appearance glue level 113 and the second character area 114 in place, namely, the third machining allowance is removed, the second character 1141 is formed in the second character area 114, and because the second character area 114 and the second appearance glue level 113 are integrally formed on the same plane, the condition that the current is unstable and the electrode loss is inconsistent when the integral electrode 50 is subjected to discharge machining due to stage difference between the second character area 114 and the second appearance glue level 113 is avoided, and the second character 1141 is prevented from being stamped.

It should be noted that, the area of the second appearance glue level 113 is far smaller than that of the first appearance glue level 111, and the area of the second character area 114 formed on the second appearance glue level 113 is also smaller and the allowance is relatively uniform, so that the discharge machining of the second character area 114 by using the whole electrode 50 is not required, and the whole discharge machining of the second appearance glue level 113 and the second character area 114 is required by adopting the whole electrode 50, so that the machining steps can be simplified, and the machining efficiency can be improved.

By way of example, the third machining allowance may be 0.03mm, i.e., the machining allowance of the second appearance cement face 113 and the second character 1141 after the machining of the machine tool 10 is completed is 0.03mm, so that the whole electrode 50 is electro-discharge machined.

Specifically, as shown in fig. 15 and 16, the shape of the integral electrode 50 is matched with the shape of the second appearance rubber surface 113, and a pattern identical to the second character 1141 is provided on the integral electrode 50 to etch out the third margin of the second appearance rubber surface 113 and the surplus portion of the second character region 114 by discharging of the integral electrode 50, thereby forming the second character 1141 on the surplus portion of the second character region 114, and finishing the second appearance rubber surface 113 and the second character region 114.

Similar to the arrangement of the first character area 112, in this embodiment, the second carving margin is provided from the length edge of the second character 1141 to the length edge of the second character area 114, and from the width edge of the second character 1141 to the width edge of the second character area 114. By providing a second engraving margin between the edge of the second character 1141 and the edge of the second character area 114, the machining error is reduced, and the integrity of the machining of the length and width edges of the second character 1141 is ensured.

The second engraving margin may be, for example, specifically 0.2mm, i.e., the length and width edges of the second character 1141 to the length and width edges of the second character area 114 are provided with a margin of 0.2 mm. Of course, in other embodiments, the second carving margin may be set as needed, and is not limited to this embodiment.

It should be noted that, the first electrode 20 and the second electrode 40 are both provided with a second void area 202, and the second void area 202 is suitable for avoiding the second appearance rubber surface 113, that is, the positions of the second appearance rubber surface 113 are avoided through the second void area 202 when the first electrode 20 and the second electrode 40 are processed in a discharging manner.

Specifically, the shape and size of the second void area 202 are matched with the shape and size of the second character area 114, so as to completely avoid the second character area 114, and ensure the complete processing of the area of the first appearance glue level 111 except the second character area 114.

For the convenience of understanding the processing method of this embodiment, the steps will be described in detail with reference to fig. 1 to 17 of the specification:

Milling the blank into the appearance of the injection mold by the machine tool 10 according to a preset program, wherein the sealing surface and the matching surface of the injection cavity 11 of the injection mold are finished to be the same, a first machining allowance is reserved after the first appearance rubber surface 111 is machined, a first character area 112 is formed on the first appearance rubber surface 111, the first character area 112 is machined in place, a second appearance rubber surface 113 of the appearance of the injection mold is roughly machined by the machine tool 10, a second character area 114 is formed on the second appearance rubber surface 113, the top surface of the second character area 114 is flush with the second appearance rubber surface 113, and a third machining allowance is reserved;

polishing the top surface of the first character area 112;

The first electrode 20 is coarsely machined to form a first appearance rubber surface 111, a second machining allowance (the second machining allowance is smaller than the first machining allowance) is reserved, the first character area 112 is avoided through a first clearance area 201 of the first electrode 20, and the second appearance rubber surface 113 is avoided through a second clearance area 202 of the first electrode 20;

the engraving electrode 30 is used for engraving the first character area 112 by thickening to form a first character 1121, and the first character 1121 reserves the same machining allowance as the first appearance glue position surface 111;

the second electrode 40 is subjected to finish machining to finish the whole first appearance glue position surface 111 and the first character 1121 in place, and the second appearance glue position surface 113 is avoided through a second avoidance area 202 of the second electrode 40;

the integral electrode 50 is finished to integrally finish the second appearance glue site 113 and the second character area 114 in place and form a second character 1141 in the second character area 114.

Another aspect of the embodiments of the present invention discloses a machining apparatus, to which the machining method of the present invention is applied, the machining apparatus including a machine tool 10, a first electrode 20, an engraving electrode 30, and a second electrode 40, wherein the machine tool 10 is adapted to mill a blank material out of an outline of an injection mold, the first electrode 20 is adapted to roughen a first appearance glue level 111, the engraving electrode 30 is adapted to roughen a first character area 112, and form a first character 1121, and the second electrode 40 is adapted to finish the first appearance glue level 111 and the first character 1121 in place as a whole.

The processing device of the embodiment applies the processing method of the present invention, so that the processing device has the same technical effects as the processing method, and will not be described herein.

In addition, the processing apparatus of the present embodiment further includes an integral electrode 50, and the integral electrode 50 is used for integrally finishing the second appearance glue level 113 and the second character area 114 in place, and forming the second character 1141 in the second character area 114.

The structures of the machine tool 10, the first electrode 20, the engraving electrode 30, the second electrode 40 and the integral electrode 50 have been described in detail above, and will not be described again here.

In another aspect, the embodiment of the invention discloses an injection mold which is manufactured by adopting the processing method or the processing device.

Because the injection mold is processed by the processing method or the processing device, the first characters 1121 on the first appearance rubber surface 111 and the second characters 1141 on the second appearance rubber surface 113 can not be stamped due to uneven electrode loss caused by uneven processing allowance, and the quality of a product 200 injected by the injection mold is ensured.

Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.

Claims (11)

1.A processing method applied to an injection mold, the processing method comprising:

Milling the blank material out of the shape of the injection mold by a machine tool (10);

The first electrode (20) is provided with a first appearance glue position surface (111) which is roughly machined on the appearance of the injection mold;

The engraving electrode (30) is used for engraving a first character area (112) on the first appearance rubber position surface (111) by thickening to form a first character (1121), and the machining allowance of the first character (1121) is consistent with that of the first appearance rubber position surface (111);

The second electrode (40) is used for finishing the first appearance glue position surface (111) and the first character (1121) in place.

2. The method of claim 1, wherein the milling of the blank material by the machine tool (10) into the shape of the injection mold comprises:

milling an injection molding cavity (11) of an injection mold on a blank material by a machine tool (10);

finish machining the sealing surface and the matching surface of the injection molding cavity (11) in place;

the first appearance rubber surface (111) of the injection molding cavity (11) is subjected to rough machining, a first machining allowance is reserved, and a protruding first character area (112) is formed on the first appearance rubber surface (111).

3. The processing method according to claim 2, wherein the step of roughing the first appearance rubber surface (111) of the injection mold profile with the first electrode (20) includes:

the first electrode (20) is formed by rough machining the first appearance rubber surface (111) and a second machining allowance is reserved, and the second machining allowance is smaller than the first machining allowance.

4. A method according to claim 3, wherein the first machining allowance is 0.04mm to 0.05mm and the second machining allowance is 0.01mm to 0.03mm.

5. The processing method according to any one of claims 2 to 4, wherein the length edge of the first character (1121) to the length edge of the first character region (112) and the width edge of the first character (1121) to the width edge of the first character region (112) are each provided with a first engraving margin;

and/or the height of the first character (1121) is identical to the height of the first character region (112).

6. The processing method according to any one of claims 1 to 4, wherein before the step of engraving the first character area (112) on the first appearance glue site surface (111) by the engraving electrode (30), the method further comprises: the top surface of the first character area (112) is polished.

7. The processing method according to any one of claims 1 to 4, characterized by further comprising:

the machine tool (10) carries out rough machining on a second appearance rubber position surface (113) of the appearance of the injection mold, a second character area (114) is formed on the second appearance rubber position surface (113), the top surface of the second character area (114) is flush with the second appearance rubber position surface (113), and a third machining allowance is reserved;

The integral electrode (50) is formed to finish the second appearance glue level (113) and the second character area (114) integrally in place, and a second character (1141) is formed in the second character area (114).

8. The processing method according to claim 7, wherein the second engraving margin is provided from the length edge of the second character (1141) to the length edge of the second character area (114) and from the width edge of the second character (1141) to the width edge of the second character area (114).

9. The method according to any one of claims 1 to 4, wherein after the step of milling the blank material out of the injection mold by the machine tool (10), further comprising: the machine tool (10) performs corner cleaning treatment on the appearance of the injection mold.

10. A processing apparatus, characterized in that the processing method according to any one of claims 1 to 9 is applied, the processing apparatus comprising:

A machine tool (10) adapted to mill a blank out of the shape of an injection mold;

a first electrode (20) adapted to roughen a first appearance glue level (111);

an engraving electrode (30) adapted to coarsely engrave the first character region (112) and form a first character (1121);

And a second electrode (40) adapted to finish the first appearance glue level (111) and the first character (1121) in place as a whole.

11. An injection mold, characterized in that it is manufactured by the manufacturing method according to any one of claims 1to 9 or the manufacturing apparatus according to claim 10.