CN216683234U

CN216683234U - Injection mold capable of preventing appearance surface of cylindrical shell from being scratched even if mold is pulled vertically

Info

Publication number: CN216683234U
Application number: CN202123383587.3U
Authority: CN
Inventors: 金耀青; 周伟军; 李澍兵
Original assignee: Guangdong Green Precision Components Co Ltd
Current assignee: Guangdong Green Precision Components Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-07
Anticipated expiration: 2031-12-29

Abstract

The utility model provides an injection mold which can not scratch the appearance surface of a cylindrical shell piece even when a mold is vertically pulled, and the injection mold comprises a front mold, a rear mold, a fixed plate and a core slide block which are matched with each other, wherein a first cooling pipeline arranged in the fixed plate is communicated with a second cooling pipeline arranged in the core slide block, a movable ejector block is arranged in the middle of the core slide block, and the core slide block and the ejector block penetrate through a rear mold base and abut against the inner side of a molding mold cavity. Be equipped with the second cooling duct on the core slider that is close to the shaping die cavity, be different from the tradition and can only be in the outside cooling of shaping die cavity for the inside of shaping die cavity also can be cooled off, has improved cooling efficiency, thereby makes to form the gap between product and the preceding mold core, consequently the perpendicular ejecting product can not fish tail the outward appearance face of cylindricality shell spare yet, has guaranteed the quality of product.

Description

Injection mold capable of preventing appearance surface of cylindrical shell from being scratched even if mold is pulled vertically

Technical Field

The utility model relates to the technical field of injection molds, in particular to an injection mold which can not scratch the appearance surface of a cylindrical shell piece even if the mold is vertically pulled out.

Background

Some electronic products require cylindrical plastic shells, and such products are mass produced by injection molding machines using molds. In order to improve the texture and the aesthetic measure of the product, the quality requirement of the appearance surface (the appearance surface) of the cylindrical plastic shell is usually high, for example, the appearance surface presents a uniform matte or uniform highlight effect, a parting line cannot be left, and the cylindrical plastic shell cannot be scratched.

Because the vertical surface of the cylindrical plastic shell is vertical to the bottom surface, if the front mold core is designed into a slide block structure, a mold parting line is inevitably left at a line position joint after mold opening; if the front mold core is designed to be a structure without a sliding block, the appearance surface of the cylindrical plastic shell can be scratched when the mold is opened.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides an injection mold which can not scratch the appearance surface of a cylindrical shell piece even if a vertical die is pulled out.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a perpendicular drawing die can not fish tail cylindricality shell piece outward appearance injection mold yet, includes matched with front mould and back mould, the front mould include the front die base and set up in preceding mold core in the front die base, back mould include the back die base and set up in back mold core in the back die base, preceding mold core with back mold core forms the shaping die cavity that supplies the plastic melt to flow in, the below of back die base is equipped with the fixed plate, be equipped with the core slider on the fixed plate, the first cooling tube who establishes in the fixed plate with the second cooling tube intercommunication that establishes in the core slider, the core slider with back mold core swing joint drives it and reciprocates, the middle part of core slider is equipped with mobilizable kicking block, the core slider with the kicking block runs through back die base and support and lean on the inboard at shaping die cavity.

Furthermore, the rear die core comprises a mounting seat and a plurality of forming blocks fixed on the mounting seat, wherein a tool-shaped groove is formed in one inward side of each forming block, one end of the tool-shaped groove is opened, and the tool-shaped groove is connected with the tool-shaped blocks on the core sliding block in a matched mode.

Furthermore, a placing groove for placing the rear mold core is formed in the rear mold base, movable grooves are formed in the inner walls of the periphery of the placing groove, a limiting table is arranged at the intersection of the movable grooves and the placing groove, and limiting blocks matched with the movable grooves are arranged on the upper portion of the periphery of the rear mold core.

Furthermore, the height of the limiting table is equal to the distance from the lower end of the limiting block to the lower end of the rear mold core.

Furthermore, a water inlet and a water outlet are respectively formed in one end, close to the fixed plate, of the core sliding block, and the water inlet and the water outlet are respectively communicated with the first cooling pipeline.

Furthermore, the two ends of the second cooling pipeline are respectively communicated with the water inlet and the water outlet, and the part, close to the side end of the core sliding block, of the second cooling pipeline is U-shaped.

Furthermore, a front mold cooling system is arranged on the front mold core close to the molding mold cavity, and the front mold cooling system is a third cooling pipeline arranged around the molding mold cavity.

Further, the front mold cooling system is manufactured by 3D printing.

Furthermore, a front mold cavity matched with the rear mold core to form the molding mold cavity is arranged on the front mold core, and the front mold cavity is processed and manufactured through an electric spark process.

The utility model has the beneficial effects that:

1. the second cooling pipeline is arranged on the core sliding block close to the molding die cavity, so that the inside of the molding die cavity can be cooled, the cooling efficiency is improved, a gap is formed between a product and the front die core, the appearance surface of the cylindrical shell cannot be scratched when the product is vertically ejected, and the quality of the product is ensured;

2. the core slide block is far away from the product, so that the rear mold core is also far away from the product, and then the product is ejected out of the mold from the inside of the product through the ejector block, so that a mold parting line is not generated on the product, and the appearance surface of the product is not scratched.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the rear mold base of the present invention;

FIG. 3 is a schematic structural view of a rear mold core according to the present invention;

FIG. 4 is a schematic view of the core slide of the present invention;

FIG. 5 is a schematic structural view of a forming block of the present invention;

FIG. 6 is a schematic structural view of a front mold according to the present invention;

FIG. 7 is a schematic diagram of the working principle of the present invention;

in the figure: 1. a front die holder; 2. a rear die holder; 21. a movable groove; 22. a limiting table; 3. a fixing plate; 4. a front mold fixing block; 5. a squirt nozzle; 6. a flow channel; 7. a spring; 8. a rear mold fixing seat; 9. a jacking plate; 10. a top block; 11. a connecting plate; 12. a mounting seat; 13. forming a block; 131. a tool-shaped groove; 132. molding an end face; 14. a core slide block; 141. a shaping block; 142. a water inlet; 143. a water outlet; 15. molding a mold cavity; 16. a front mold cooling system; 17. producing a product; 18. and a limiting block.

Detailed Description

The utility model is described in detail below with reference to the attached drawing figures:

as shown in fig. 1-7, an injection mold for vertical mold drawing without scratching the appearance surface of a cylindrical shell comprises a front mold and a rear mold which are matched, the front mold comprises a front mold base 1 and a front mold core arranged in the front mold base 1, the rear mold comprises a rear mold base 2 and a rear mold core arranged in the rear mold base 2, the front mold core and the rear mold core form a molding mold cavity 15 into which a plastic melt flows, a fixing plate 3 is arranged below the rear mold base 2, a core slide 14 is arranged on the fixing plate 3, a first cooling pipeline arranged in the fixing plate 3 is communicated with a second cooling pipeline arranged in the core slide 14, wherein a water inlet 142 and a water outlet 143 are respectively arranged at one end of the core slide 14 close to the fixing plate 3, the water inlet 142 and the water outlet 143 are respectively communicated with the first cooling pipeline, and the first cooling pipeline is communicated with the outside of the mold, that is external cooling liquid enters from an external inlet on the first cooling pipeline on the fixing plate 3, then enters the second cooling pipeline through the water inlet 142 on the core slide 14, and the cooling liquid after cooling and heat exchange enters the first cooling pipeline from the water outlet 143 on the core slide 14 and flows out from the external outlet of the first cooling pipeline; when the cooling liquid flows on the second cooling pipeline, the part, close to the side end of the core slide block 14, of the second cooling pipeline is U-shaped, so that the flowing time of the cooling liquid in the second cooling pipeline is prolonged, the contact area between the cooling liquid and the inside of the molding cavity 15 is increased, a front mold cooling system 16 manufactured by 3D printing is arranged on a front mold core close to the molding cavity 15, the front mold cooling system 16 is a third cooling pipeline arranged around the molding cavity 15, the cooling is different from the traditional method that the cooling is only carried out on the outside of the molding cavity 15, the inside of the molding cavity 15 can be cooled, the cooling efficiency is improved, a gap is formed between a product 17 and the front mold core, and therefore, the appearance surface of a cylindrical shell piece cannot be scratched when the product 17 is vertically ejected, and the quality of the product 17 is ensured; when the product 17 is taken out, the product 17 is vertically ejected through the ejector block 10, namely, the ejector block 10 is arranged in the middle of the core slide block 14, one end of the ejector block 10 is connected with the driving mechanism to drive the ejector block 10 to move, and the other end of the ejector block 10 and the core slide block 14 penetrate through the rear die holder 2 and abut against the inner side of the molding die cavity 15, so that the product 17 is conveniently ejected.

The core slide block 14 is provided with a shaping block 141, the rear mold core comprises a mounting seat 12 and a plurality of shaping blocks 13 fixed on the mounting seat 12, the shaping blocks 13 are provided with shaping end surfaces 132, the shaping end surfaces 132 form a rear mold shaping surface, and the rear mold shaping surface is matched with the front mold core to form a shaping mold cavity 15; a tool-shaped groove 131 is formed in one inward side of the forming block 13, one end of the tool-shaped groove 131 is opened, the tool-shaped groove 131 is matched and connected with a tool-shaped block 141 on the core sliding block 14, in the using process, the tool-shaped block 141 abuts against one end of the tool-shaped groove 131, and when the tool-shaped block 141 is moved out of the opening in one end of the tool-shaped groove 131, the whole rear mold core can also move along with the tool-shaped groove, so that the rear mold core leaves the forming mold cavity 15 and the product 17, and the product 17 is convenient to take out; in the process, in order to prevent the quality problem of the product 17 caused by the large-amplitude movement of the rear mold core, a placing groove for placing the rear mold core is arranged on the rear mold base 2, a movable groove 21 is arranged on the inner wall of the periphery of the placing groove, a limiting table 22 is arranged at the intersection of the movable groove 21 and the placing groove, and a limiting block 18 matched with the movable groove 21 is arranged on the upper part of the periphery of the rear mold core, so that the limiting block 18 moves in the placing groove, and the arranged limiting table 22 also prevents the large-amplitude movement of the rear mold core; and the height of the limiting table 22 is equal to the distance from the lower end of the limiting block 18 to the lower end of the rear mold core, so that the rear mold core is just placed in the placing groove even if moving, and the rear mold core is prevented from being separated from the rear mold base 2 to influence the production efficiency.

And the front mold core is provided with a front mold cavity which is matched with the rear mold core to form a molding mold cavity 15, and the front mold cavity is processed by an electric spark process, so that the appearance surface of the product 17 has a matte effect, and the quality of the product 17 is improved.

And, injection mold still includes the front mould fixed plate 3 with front die holder 1 is connected, and front mould fixed plate 3 is used for installing front die holder 1 and front mold core on the injection molding machine, and injection mold still includes the back mould fixing base 8 with back die holder 2 is connected. The rear die fixing seat 8 is used for installing the rear die holder 2 and the rear die core on the injection molding machine; the injection mould also comprises a squirt nozzle 5 arranged on the front mould base 1, the squirt nozzle 5 is used for connecting an injection molding machine for generating plastic melt, and the squirt nozzle 5 extends into the runner 6 so that the plastic melt generated by the injection molding machine enters the runner 6 through the squirt nozzle 5 and is subjected to injection molding production for the molding mould cavity 15; the injection mold further comprises a jacking plate 9, a jacking block 10 is arranged on the jacking plate 9, and the jacking plate 9 is arranged on a jacking seat; the injection mold also comprises a spring 7 sleeved on the guide post, and the spring 7 is elastically abutted between the rear mold and the jacking plate 9;

the working principle of the utility model is as follows:

as shown in fig. 1-7, the plastic melt enters the runner 6 through the sprue bushing 5, then enters the molding cavity 15 through the runner 6, and is cooled after the injection molding is completed, i.e., the front mold cooling system 16 outside the molding cavity 15 and the second cooling pipeline inside the molding cavity perform cooling operation simultaneously, so that the cooling efficiency is improved, after the product 17 is cooled and solidified to a certain rigidity, a gap is formed between the product 17 and the front mold core and the rear mold core, and then the product 17 can be taken out; the process of taking out the product 17 is as follows, firstly the front die fixing plate 3 and the front die holder 1 leave the rear die holder 2, then the rear die holder 2 leaves the fixing plate 3, meanwhile, the core sliding block 14 is fixedly connected with the fixing plate 3, namely, when the rear die holder 2 leaves the fixing plate 3, the I-shaped block 141 on the core sliding block 14 leaves from an opening of the I-shaped groove 131, then the front die core also leaves the molding die cavity 15 along with the core sliding block 14 and reaches the bottom of the placing groove, and then the ejector block 10 is driven by the driving mechanism to eject the product 17 upwards.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, which are directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An injection mold capable of vertically drawing a mold without scratching the appearance surface of a cylindrical shell piece comprises a front mold and a rear mold which are matched, wherein the front mold comprises a front mold seat (1) and a front mold core arranged in the front mold seat (1), the rear mold comprises a rear mold seat (2) and a rear mold core arranged in the rear mold seat (2), the front mold core and the rear mold core are matched to form a molding mold cavity (15) for plastic melt to flow into, the mold is characterized in that a fixing plate (3) is arranged below the rear mold base (2), a core sliding block (14) is arranged on the fixing plate (3), a first cooling pipeline arranged in the fixing plate (3) is communicated with a second cooling pipeline arranged in the core sliding block (14), the core sliding block (14) is movably connected with the rear mold core and drives the rear mold core to move up and down, a movable ejector block (10) is arranged in the middle of the core sliding block (14), and the core sliding block (14) and the ejector block (10) penetrate through the rear mold base (2) and abut against the inner side of a molding mold cavity (15).

2. The injection mold for vertically drawing the mold without scratching the appearance surface of the cylindrical shell according to claim 1, wherein the rear mold core comprises a mounting seat (12) and a plurality of forming blocks (13) fixed on the mounting seat (12), one inward side of each forming block (13) is provided with a groove (131), one end of each groove (131) is opened, and the grooves (131) are matched and connected with the blocks (141) on the core sliding block (14).

3. The injection mold with the vertical drawing die capable of not scratching the appearance surface of the cylindrical shell piece is also characterized in that a placing groove for placing the rear mold core is arranged on the rear mold base (2), a movable groove (21) is arranged on the peripheral inner wall of the placing groove, a limiting table (22) is arranged at the intersection of the movable groove (21) and the placing groove, and a limiting block (18) matched with the movable groove (21) is arranged on the peripheral upper part of the rear mold core.

4. An injection mold with a vertical drawing die which can not scratch the appearance surface of a cylindrical shell piece according to claim 3, characterized in that the height of the limiting table (22) is equal to the distance from the lower end of the limiting block (18) to the lower end of the rear mold core.

5. The injection mold for vertically drawing the mold without scratching the appearance of the cylindrical shell according to claim 1, wherein the core slide (14) is provided with a water inlet (142) and a water outlet (143) at the ends thereof adjacent to the fixed plate (3), and the water inlet (142) and the water outlet (143) are respectively communicated with the first cooling duct.

6. The injection mold with the vertical drawing die capable of not scratching the appearance surface of the cylindrical shell piece is also characterized in that two ends of the second cooling pipeline are respectively communicated with the water inlet (142) and the water outlet (143), and the part of the second cooling pipeline, which is close to the side end of the core sliding block (14), is U-shaped.

7. An injection mould without scratching the appearance of the cylindrical shell by vertical drawing according to claim 1, wherein the front core near the molding cavity (15) is provided with a front mold cooling system (16), and the front mold cooling system (16) is a third cooling duct arranged around the molding cavity (15).

8. An injection mould without scratching the appearance of the cylindrical shell by vertical drawing according to claim 7, characterized in that the front mould cooling system (16) is manufactured by 3D printing.

9. The injection mold of claim 1, wherein the front mold core is provided with a front mold cavity which cooperates with the rear mold core to form a molding cavity (15), and the front mold cavity is formed by electric discharge machining.