CN218985550U

CN218985550U - Hot runner injection mold

Info

Publication number: CN218985550U
Application number: CN202223234121.1U
Authority: CN
Inventors: 邓炬兵; 钟志和
Original assignee: Dongguan Chi Shing Plastic Products Co ltd
Current assignee: Dongguan Chi Shing Plastic Products Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-05-09
Anticipated expiration: 2032-12-01

Abstract

The application discloses a hot runner injection mold relates to mould technical field. The mold comprises a movable mold and a fixed mold, wherein a cavity is formed in the bottom of the movable mold, a mold core matched with the cavity is formed in the top of the fixed mold, and a through groove communicated with the cavity is formed in the top of the movable mold; the heating die is arranged at the top of the movable die, a heating cavity is formed in the heating die, a pouring gate communicated with the heating cavity is formed in the top of the heating die, a spray pipe is communicated with the bottom of the heating die, and the end part of the spray pipe is movably inserted into the through groove; heating the silk screen; this application sets up heating silk screen and heating rod respectively inside heating chamber and spray tube, and not prior art is wrapping up outside it for when heating the fuse-element, be direct contact fuse-element and to its transmission heat, not only make the heating efficiency to the fuse-element fast, it is even to the fuse-element heating simultaneously, guarantees that the fuse-element is not solidified all the time and viscosity is moderate, ensures the quality after the shaping of mould product.

Description

Hot runner injection mold

Technical Field

The application relates to the technical field of molds, in particular to a hot runner injection mold.

Background

The hot runner mold is a mold which utilizes a heating device to ensure that melt in the runner is not solidified all the time, and because the mold has a shorter molding period and saves more raw materials than the traditional mold, the hot runner mold is widely applied in various industrial developed countries and regions in the world nowadays, the whole runner from the nozzle outlet of an injection molding machine to a sprue is in a high-temperature state, so that plastic in the runner is kept molten, and the hot runner mold needs the heating device to ensure that the melt in the runner is not solidified all the time and has moderate viscosity, so that the uniformity of heating of the hot runner mold is solved and has important influence on the molding quality of a hot runner mold product.

The existing hot runner mold is mainly formed by wrapping a heating pipe outside a flow distribution plate and a hot runner, metal mediums are arranged between a melt and the heating pipe at intervals, the hot runner mold belongs to interlayer heating, the temperature of the melt in the hot runner close to the heating pipe is high, the temperature of the melt in the hot runner far away from the heating pipe is low, the heating is uneven, the melt is difficult to ensure to be not solidified all the time, and the viscosity is moderate, so that the hot runner injection mold is provided.

Disclosure of Invention

The purpose of the present application is: to solve the problems in the background described above, the present application provides a hot runner injection mold.

The application specifically adopts the following technical scheme for realizing the purposes:

the hot runner injection mold comprises a movable mold and a fixed mold, wherein a cavity is formed in the bottom of the movable mold, a mold core matched with the cavity is formed at the top of the fixed mold, and a through groove communicated with the cavity is formed in the top of the movable mold;

the heating die is arranged at the top of the movable die, a heating cavity is formed in the heating die, a pouring gate communicated with the heating cavity is formed in the top of the heating die, a spray pipe is communicated with the bottom of the heating die, and the end part of the spray pipe is movably inserted into the through groove;

the heating silk screen is arranged in the heating cavity and is connected with a heating rod and a connector, the end part of the heating rod extends into the spray pipe, and the end part of the connector extends out of the heating die.

Further, the heating rod is in a spiral configuration.

Further, the inner bottom wall of the heating cavity is in a conical structure, and the spray pipe is communicated with the conical end.

Further, the heating die comprises an upper die body, a lower die body, two first connecting blocks and two second connecting blocks, wherein:

the opposite sides of the upper die body and the lower die body are respectively provided with a containing groove, the connector movably penetrates through the two containing grooves, the two first connecting blocks are symmetrically arranged on the upper die body, the two second connecting blocks are symmetrically arranged on the lower die body, the two first connecting blocks are respectively in one-to-one correspondence with the two second connecting blocks, and the corresponding first connecting blocks and second connecting blocks are fixed through the matching of bolts and nuts.

Further, the seal grooves are formed in opposite sides of the upper die body and the lower die body, the two seal grooves are respectively communicated with the two accommodating grooves, copper sleeves are inserted in the two seal grooves, arc-shaped portions corresponding to the two accommodating grooves are respectively formed in the two copper sleeves, and sealing gaskets are arranged on inner walls of the two arc-shaped portions.

Further, two guide grooves are symmetrically formed in the upper die body, two guide posts are symmetrically formed in the lower die body, and the two guide posts are respectively matched with the two guide grooves in an inserting mode.

Further, the inner wall of the through groove is provided with a heat insulation sleeve.

The beneficial effects of this application are as follows: this application sets up heating silk screen and heating rod respectively inside heating chamber and spray tube, and not prior art is wrapping up outside it for when heating the fuse-element, be direct contact fuse-element and to its transmission heat, not only make the heating efficiency to the fuse-element fast, it is even to the fuse-element heating simultaneously, guarantees that the fuse-element is not solidified all the time and viscosity is moderate, ensures the quality after the shaping of mould product.

Drawings

FIG. 1 is a perspective view of the present application;

FIG. 2 is a perspective cross-sectional view of the present application;

FIG. 3 is a cross-sectional view of yet another perspective structure of the present application;

FIG. 4 is an exploded view of a portion of the present application in perspective;

FIG. 5 is an enlarged view of FIG. 2A of the present application;

FIG. 6 is an enlarged view of FIG. 3B of the present application;

FIG. 7 is an enlarged view of FIG. 4C of the present application;

reference numerals: 1. a movable mold; 2. a fixed mold; 3. a cavity; 4. a core; 5. penetrating a groove; 6. heating the mold; 7. a heating chamber; 8. a gate; 9. a spray pipe; 10. heating the silk screen; 11. a heating rod; 12. a connector; 13. sealing grooves; 14. a copper sleeve; 15. a sealing gasket; 16. a guide groove; 17. a guide post; 18. a heat insulating sleeve; 601. an upper die body; 602. a lower die body; 603. a first connection block; 604. a second connection block; 605. a bolt; 606. a screw cap; 607. an accommodating groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

As shown in fig. 1-6, a hot runner injection mold provided by an embodiment of the present application includes a movable mold 1 and a fixed mold 2, a cavity 3 is provided at the bottom of the movable mold 1, a core 4 matched with the cavity 3 is configured at the top of the fixed mold 2, and a through slot 5 communicated with the cavity 3 is provided at the top of the movable mold 1; the heating die 6 is arranged at the top of the movable die 1, a heating cavity 7 is formed in the heating die 6, a pouring gate 8 communicated with the heating cavity 7 is formed in the top of the heating die 6, a spray pipe 9 is communicated with the bottom of the heating die 6, and the end part of the spray pipe 9 is movably inserted into the through groove 5; the heating silk screen 10 sets up in heating chamber 7, heating silk screen 10 is connected with heating rod 11 and connector 12, the tip of heating rod 11 extends to in spray tube 9, preferably, core 4, die cavity 3, wear groove 5, spray tube 9 and the quantity of heating rod 11 are a plurality of, the tip of connector 12 extends to outside the heating mould 6, connector 12 is used for being connected with external power supply, when carrying out the injection molding, the fuse-element gets into heating chamber 7 from runner 8, in the circulation is to spray tube 9, finally the circulation is to the design cavity that die cavity 3 and core 4 formed in, the fuse-element is in circulation to heating chamber 7 and spray tube 9 in, heating silk screen 10 heats the fuse-element with heating rod 11 for the fuse-element is direct with heating device contact, heating efficiency is fast, the fuse-element heating is even simultaneously, guarantee that the fuse-element is not solid and viscosity is moderate all the time, ensure the quality after the mould product shaping.

As shown in fig. 4 and 5, in some embodiments, the heating rod 11 is in a spiral configuration, and the heating rod 11 is in a spiral configuration, so that the heating effect on the melt in the nozzle 9 is better, and meanwhile, the cavity formed in the middle part is also convenient for the needle valve to pass through to seal or unseal the nozzle of the nozzle 9.

As shown in fig. 2, in some embodiments, the inner bottom wall of the heating chamber 7 has a conical configuration, and the nozzle 9 is connected at the conical end, so that the melt in the heating chamber 7 can completely flow into the nozzle 9, and no horizontal interception exists, so that the uniformity of heating the solution is not affected by residual materials in the heating chamber.

As shown in fig. 1, 4 and 6, in some embodiments, the heating die 6 includes an upper die body 601, a lower die body 602, two first connection blocks 603, and two second connection blocks 604, wherein: the holding grooves 607 are formed in opposite sides of the upper die body 601 and the lower die body 602, the connector 12 movably penetrates through the two holding grooves 607, the two first connecting blocks 603 are symmetrically arranged on the upper die body 601, the two second connecting blocks 604 are symmetrically arranged on the lower die body 602, the two first connecting blocks 603 are respectively in one-to-one correspondence with the two second connecting blocks 604, the corresponding first connecting blocks 603 and the second connecting blocks 604 are fixed through the matching of the bolts 605 and the nuts 606, the heating die 6 consists of the upper die body 601 and the lower die body 602 and is fixed through the matching of the bolts 605 and the nuts 606, and therefore the heating die 6 can be integrally detached and separated, so that the heating wire mesh 10 and the heating rod 11 in the heating cavity 7 and the spray pipe 9 can be overhauled and maintained conveniently, and meanwhile, the inside of the heating die 6 is cleaned conveniently.

As shown in fig. 7, in some embodiments, the opposite sides of the upper die body 601 and the lower die body 602 are provided with sealing grooves 13, the two sealing grooves 13 are respectively communicated with the two accommodating grooves 607, copper sleeves 14 are respectively inserted into the two sealing grooves 13, arc-shaped portions corresponding to the two accommodating grooves 607 are respectively constructed on the two copper sleeves 14, sealing gaskets 15 are respectively arranged on the inner walls of the two arc-shaped portions, heat loss is reduced through the arrangement of the sealing grooves 13 and the copper sleeves 14, the tightness of the heating die 6 is improved, and after the upper die body 601 and the lower die body 602 are fastened and fixed through the arrangement of the sealing gaskets 15, the tightness can be ensured, and meanwhile, the joint 12 is not damaged by crush injury.

As shown in fig. 6, in some embodiments, two guide slots 16 are symmetrically formed on the upper die body 601, two guide posts 17 are symmetrically configured on the lower die body 602, the two guide posts 17 are respectively in plug-in fit with the two guide slots 16, and the snap-in fit of the upper die body 601 and the lower die body 602 is facilitated by the plug-in fit of the guide slots 16 and the guide posts 17.

As shown in fig. 5, in some embodiments, the heat insulation sleeve 18 is disposed on the inner wall of the through slot 5, and the heat insulation sleeve 18 is used for insulating the nozzle 9 to prevent heat loss, and meanwhile, avoid excessive heat transfer to the moving die 1, which affects cooling and shaping of the die.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The hot runner injection mold comprises a movable mold (1) and a fixed mold (2), and is characterized in that a cavity (3) is formed in the bottom of the movable mold (1), a mold core (4) matched with the cavity (3) is formed at the top of the fixed mold (2), and a through groove (5) communicated with the cavity (3) is formed in the top of the movable mold (1);

the heating die (6) is arranged at the top of the movable die (1), a heating cavity (7) is formed in the heating die (6), a pouring gate (8) communicated with the heating cavity (7) is formed in the top of the heating die (6), a spray pipe (9) is communicated with the bottom of the heating die (6), and the end part of the spray pipe (9) is movably inserted into the through groove (5);

the heating silk screen (10) is arranged in the heating cavity (7), the heating silk screen (10) is connected with a heating rod (11) and a connector (12), the end part of the heating rod (11) extends into the spray pipe (9), and the end part of the connector (12) extends out of the heating die (6).

2. Hot runner injection mold according to claim 1, characterized in that the heating rod (11) is of helical configuration.

3. Hot runner injection mold according to claim 1, characterized in that the inner bottom wall of the heating chamber (7) is of conical configuration, the nozzle (9) communicating at the conical end.

4. The hot runner injection mold according to claim 1, characterized in that the heating mold (6) comprises an upper mold body (601), a lower mold body (602), two first connection blocks (603) and two second connection blocks (604), wherein:

the utility model discloses a die comprises an upper die body (601), a lower die body (602), a connector (12), a connecting block (603), a nut (606), a bolt (605) and a nut (604), wherein the upper die body (601) and the opposite sides of the lower die body (602) are respectively provided with a containing groove (607), the connector (12) movably penetrates through the two containing grooves (607), the two first connecting blocks (603) are symmetrically arranged on the upper die body (601), the two second connecting blocks (604) are symmetrically arranged on the lower die body (602), the two first connecting blocks (603) are respectively in one-to-one correspondence with the two second connecting blocks (604), and the corresponding first connecting blocks (603) and second connecting blocks (604) are fixed through the matching of the bolt (605) and the nut (606).

5. The hot runner injection mold according to claim 4, wherein the upper mold body (601) and the lower mold body (602) are provided with sealing grooves (13) on opposite sides, the two sealing grooves (13) are respectively communicated with the two accommodating grooves (607), copper sleeves (14) are respectively inserted into the two sealing grooves (13), arc-shaped portions corresponding to the two accommodating grooves (607) are respectively formed on the two copper sleeves (14), and sealing gaskets (15) are respectively arranged on inner walls of the two arc-shaped portions.

6. The hot runner injection mold according to claim 4, wherein two guide grooves (16) are symmetrically formed in the upper mold body (601), two guide posts (17) are symmetrically formed in the lower mold body (602), and the two guide posts (17) are respectively in plug-in fit with the two guide grooves (16).

7. Hot runner injection mold according to claim 1, characterized in that the inner wall of the through slot (5) is provided with a heat insulating sleeve (18).