CN112590071A

CN112590071A - Injection mold sliding block machining method, mold and product forming method

Info

Publication number: CN112590071A
Application number: CN202011451551.1A
Authority: CN
Inventors: 李凤园; 李荣辉
Original assignee: Huizhou Weibo Precision Technology Co ltd
Current assignee: Huizhou Weibo Precision Technology Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-04-02

Abstract

The invention relates to a method for processing a sliding block of an injection mold, the mold and a method for forming a product, wherein the method for processing the sliding block of the injection mold comprises the following steps: manufacturing a rough-trimming copper male, manufacturing a fine-trimming copper male, manufacturing a sliding block, performing rough male discharge and performing fine male discharge. According to the method, the first sliding block, the second sliding block, the third sliding block and the fourth sliding block can be subjected to rough common discharge machining to form the cambered surfaces by adopting a single rough copper common, then the first sliding block, the second sliding block, the third sliding block and the fourth sliding block are subjected to fine common discharge machining by adopting a single fine copper common, so that the precision of the cambered surfaces is improved, the copper common does not need to be replaced in the rough common discharge and fine common discharge processes, the consistency of electrodes is effectively kept, the machining precision is improved, and meanwhile, the efficiency and precision are prevented from being reduced due to excessive clamping times.

Description

Injection mold sliding block machining method, mold and product forming method

Technical Field

The invention relates to the field of injection molding, in particular to a machining method of a sliding block of an injection mold, the mold and a product forming method.

Background

The partially injection molded product has a plate-shaped bottom surface and side surfaces arranged on the periphery of the bottom surface, the side surfaces are formed into cambered surfaces, and the cambered surfaces are formed by arranging sliding blocks in a mold. The arc surface of the sliding block is usually formed in an electric discharge machining mode, the sliding block is usually subjected to electric discharge machining by adopting a plurality of copper electrodes in the conventional machining method, the number of the copper electrodes is large, the copper electrodes are required to be replaced after each electric discharge machining of an electric discharge machine, and the machining efficiency is low due to repeated clamping. In addition, because errors exist among the electrodes of the copper male, after the electric discharge machining, the sliding blocks are matched with gaps, so that lines or steps are easy to be clamped after injection molding, and the appearance and the quality of a product are affected.

Disclosure of Invention

The invention aims to provide a machining method of a sliding block of an injection mold, the mold and a product forming method, which can improve errors caused by a plurality of electrodes, reduce clamping times and improve machining efficiency.

A machining method for a sliding block of an injection mold comprises the following steps:

manufacturing a rough trimming copper stud, and forming a first cambered surface forming part, a second cambered surface forming part, a third cambered surface forming part and a fourth cambered surface forming part on the rough trimming copper stud;

manufacturing a fine copper stud, and forming an integrated arc surface on the periphery of the fine copper stud, wherein the arc surface is provided with a first edge corresponding to the first arc surface forming part, a second edge corresponding to the second arc surface forming part, a third edge corresponding to the third arc surface forming part and a fourth edge corresponding to the fourth arc surface forming part;

manufacturing a sliding block, and forming a first bulge, a second bulge, a third bulge and a fourth bulge on the first sliding block, the second sliding block, the third sliding block and the fourth sliding block respectively;

rough male discharge, namely, sequentially performing rough male discharge machining on the slide block through rough copper trimming by using an electric spark machine, wherein a first cambered surface is formed on the first bulge through the first cambered surface forming part, a second cambered surface is formed on the second bulge through the second cambered surface forming part, a third cambered surface is formed on the third bulge through the third cambered surface forming part, and a fourth cambered surface is formed on the fourth bulge through the fourth cambered surface forming part;

and performing fine and common discharge, namely performing fine and common discharge machining on the slider in sequence by using an electric spark machine through fine copper machining, wherein the first arc surface is subjected to fine and common discharge through the first edge, the second arc surface is subjected to fine and common discharge through the second edge, the third arc surface is subjected to fine and common discharge through the third edge, and the fourth arc surface is subjected to fine and common discharge through the fourth edge.

Furthermore, when the discharge is performed in a rough manner, the spark position is-0.2 mm, and the balance is 0.05 mm.

Furthermore, when the electric discharge is performed, the spark position is-0.05 mm.

Furthermore, the first cambered surface forming portion, the second cambered surface forming portion, the third cambered surface forming portion and the fourth cambered surface forming portion are located on the same surface of the rough-trimming copper.

Furthermore, when the sliding block is manufactured, the manufacturing method also comprises the step of manufacturing guide grooves on the first sliding block, the second sliding block, the third sliding block and the fourth sliding block.

Further, one corner of the rough-repaired copper male and the refined copper male is provided with a C-shaped angle.

Furthermore, a rough-trimming copper stud, a fine-trimming copper stud and a sliding block are manufactured by adopting CNC machining.

The die comprises an upper die holder and a lower die holder which are arranged oppositely, and the lower die holder is provided with a first sliding block, a second sliding block, a third sliding block and a fourth sliding block which are processed by the injection die sliding block processing method in a sliding mode.

A product forming method adopts the die and comprises the following steps:

s1, the upper die base moves relative to the lower die base to drive the first sliding block, the second sliding block, the third sliding block and the fourth sliding block to slide;

s2, the first bulge, the second bulge, the third bulge and the fourth bulge are tightly abutted against each other, so that a forming space into which hot fluid can be injected is formed in a surrounding mode, wherein the first cambered surface, the second cambered surface, the third cambered surface and the fourth cambered surface form a cambered surface on the periphery of a molded product in a surrounding mode;

s3, injecting hot fluid into the forming space and cooling the hot fluid to form a molded product;

and S4, resetting the upper die base, separating the first slide block, the second slide block, the third slide block and the fourth slide block from each other and taking out the molded product.

Compared with the prior art, the invention has the beneficial effects that: the injection mold slider processing method adopts single rough trimming copper to carry out rough common discharge machining on the first slider, the second slider, the third slider and the fourth slider to form the cambered surface, then, single fine trimming copper is used for carrying out fine common discharge machining on the first slider, the second slider, the third slider and the fourth slider to improve the precision of the cambered surface, the copper is not required to be replaced in the rough common discharge and the fine common discharge processes, the consistency of electrodes is effectively kept, the processing precision is improved, and meanwhile, the efficiency and the precision are prevented from being reduced due to excessive clamping times. The slider manufactured by the injection mold slider processing method has high accuracy of the cambered surface, is tightly matched, and does not have the phenomena of line clamping and step during injection molding.

Drawings

FIG. 1 is a schematic structural diagram of a rough-repair copper bush of the present invention.

FIG. 2 is a schematic diagram of rough male discharge of the injection mold slider processing method of the present invention.

FIG. 3 is a schematic structural diagram of the copper finishing tool of the present invention.

FIG. 4 is a schematic diagram of the fine male discharge of the injection mold slider processing method of the present invention.

FIG. 5 is a schematic structural diagram of a slider according to the present invention.

Fig. 6 is a schematic structural view of the mold of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to 5, in a preferred embodiment, the method for processing the slide block of the injection mold of the present invention comprises the following steps:

manufacturing a rough trimming copper bush 1, and forming a first cambered surface forming part 11, a second cambered surface forming part 12, a third cambered surface forming part 13 and a fourth cambered surface forming part 14 on the rough trimming copper bush 1. In specific implementation, the rough-repaired copper bush 1 can be manufactured by CNC machining. It should be noted that the first arc forming portion 11, the second arc forming portion 12, the third arc forming portion 13, and the fourth arc forming portion 14 are located on the same surface of the rough-machined copper bush 1, so as to perform rough-machining discharge on the slider, ensure consistency of the electrodes, and improve machining accuracy. In this embodiment, one of the corners of the rough-repaired copper core 1 is provided with a C-angle 15, so as to facilitate fool-proofing and clamping.

The method comprises the steps of manufacturing a refined copper male 2, forming an integrated arc surface 21 on the periphery of the refined copper male 2, wherein the arc surface 21 is provided with a first side 211 corresponding to the first arc forming part 11, a second side 212 corresponding to the second arc forming part 12, a third side 213 corresponding to the third arc forming part 13 and a fourth side 214 corresponding to the fourth arc forming part 14. In specific implementation, the fine copper 2 can be manufactured by CNC machining. In this embodiment, one of the corners of the fine copper 2 is provided with a C-angle 22 for fool-proofing and clamping.

The sliders are fabricated, and the first protrusion 311, the second protrusion 321, the third protrusion 331, and the fourth protrusion 341 are formed on the first slider 31, the second slider 32, the third slider 33, and the fourth slider 34, respectively. When the concrete implementation is carried out, the sliding block can be manufactured through CNC machining. In the process of manufacturing the slide blocks, the method further comprises the step of manufacturing guide grooves on the first slide block 31, the second slide block 32, the third slide block 33 and the fourth slide block 34 so as to facilitate the movement of the mold driving slide blocks.

Rough tolerance discharge, using an electric spark machine to perform rough tolerance discharge machining on the slider in sequence through rough trimming copper tolerance 1, wherein a first arc surface 312 is formed on the first protrusion 311 through the first arc surface forming portion 11, a second arc surface 322 is formed on the second protrusion 321 through the second arc surface forming portion 12, a third arc surface 332 is formed on the third protrusion 331 through the third arc surface forming portion 13, and a fourth arc surface 342 is formed on the fourth protrusion 341 through the fourth arc surface forming portion 14. During rough male discharge, the spark position is-0.2 mm, and the balance is 0.05mm, so as to reserve fine male machining. Referring to fig. 2, a1 is a schematic diagram of rough-trimming copper bar 1 discharging to the first slider 31 roughly, a2 is a schematic diagram of rough-trimming copper bar 1 discharging to the second slider 32 roughly, A3 is a schematic diagram of rough-trimming copper bar 1 discharging to the third slider 33 roughly, and a4 is a schematic diagram of rough-trimming copper bar 1 discharging to the fourth slider 34 roughly.

And (3) performing fine male discharge, namely performing fine male discharge machining on the slider in sequence by using an electric spark machine through a fine copper male machining tool 2, wherein the first arc surface 312 is subjected to fine male discharge through the first edge 211, the second arc surface 322 is subjected to fine male discharge through the second edge 212, the third arc surface 332 is subjected to fine male discharge through the third edge 213, and the fourth arc surface 342 is subjected to fine male discharge through the fourth edge 214. When the electricity is discharged, the spark position is-0.05 mm. Referring to fig. 4, B1 is a schematic diagram of the rough trimming copper bar 1 discharging to the first slider 31, B2 is a schematic diagram of the rough trimming copper bar 1 discharging to the second slider 32, B3 is a schematic diagram of the rough trimming copper bar 1 discharging to the third slider 33, and B4 is a schematic diagram of the rough trimming copper bar 1 discharging to the fourth slider 34.

According to the injection mold slider machining method, the first slider 31, the second slider 32, the third slider 33 and the fourth slider 34 can be subjected to rough common discharge machining to form the arc surface by adopting a single rough copper tool 1, and then the first slider 31, the second slider 32, the third slider 33 and the fourth slider 34 are subjected to fine common discharge machining to improve the accuracy of the arc surface by adopting a single fine copper tool 2, copper tools do not need to be replaced in the rough common discharge and fine common discharge processes, the consistency of electrodes is effectively kept, the accuracy of arc surface machining is improved, and meanwhile, the efficiency and accuracy are prevented from being reduced due to excessive clamping times. The slider manufactured by the injection mold slider processing method has high accuracy of the cambered surface, is tightly matched, and does not have the phenomena of line clamping and step during injection molding.

Referring to fig. 6, the present invention further provides a mold, which includes an upper mold base 4 and a lower mold base 5 that are oppositely disposed, and the lower mold base 5 is provided with a first sliding block 31, a second sliding block 32, a third sliding block 33, and a fourth sliding block 34 that are processed by the above-mentioned injection mold sliding block processing method in a sliding manner. It should be understood that the upper die base 4 is provided with not-shown angle pins for driving the first slider 31, the second slider 32, the third slider 33 and the fourth slider 34 to slide.

A product forming method adopts the die and comprises the following steps:

s1, the upper die base 4 moves relative to the lower die base 5, and the first sliding block 31, the second sliding block 32, the third sliding block 33 and the fourth sliding block 34 are driven to slide;

s2, the first protrusion 311, the second protrusion 321, the third protrusion 331, and the fourth protrusion 341 tightly abut against each other, thereby enclosing a molding space into which hot fluid can be injected, wherein the first arc surface 312, the second arc surface 322, the third arc surface 332, and the fourth arc surface 342 enclose an arc surface forming the periphery of the molded product;

s4, the upper die base 4 is reset, the first slide 31, the second slide 32, the third slide 33 and the fourth slide 34 are separated from each other and the molded product is taken out.

In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The machining method of the sliding block of the injection mold is characterized by comprising the following steps of:

2. A method of making an injection mold slide as in claim 1, wherein the spark location is-0.2 mm with a margin of 0.05mm during a rough male discharge.

3. A method of making an injection mold slide as in claim 2, wherein the spark position is-0.05 mm during the fine male discharge.

4. The method of claim 1, wherein the first, second, third, and fourth contoured surface portions are on a same surface of the rough machined copper.

5. The method of claim 1, further comprising forming guide slots in the first, second, third, and fourth slides when forming the slides.

6. An injection mold slide manufacturing method as claimed in claim 1, wherein one of the corner portions of said rough and finish copper keys is provided with a C-angle.

7. An injection mold slide fabrication method as claimed in claim 1, wherein CNC machining is used to fabricate the rough machined copper insert, the finish machined copper insert, and the slide.

8. A mold, characterized by comprising an upper mold base and a lower mold base which are oppositely arranged, wherein the lower mold base is provided with a first slide block, a second slide block, a third slide block and a fourth slide block which are processed by using the slide block processing method of the injection mold according to any one of claims 1 to 7 in a sliding mode.

9. A method of forming a product using the mold of claim 8, comprising the steps of: