CN211194795U

CN211194795U - Vacuumizing auxiliary injection mold structure

Info

Publication number: CN211194795U
Application number: CN201921827170.1U
Authority: CN
Inventors: 姚景棠
Original assignee: Senjun Excellent Prec Mold Shenzhen Co ltd
Current assignee: Senjun precision manufacturing (Shenzhen) Co.,Ltd.
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-08-07
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a vacuumizing auxiliary injection mold structure, which comprises a movable mold, a fixed mold and a pouring mechanism, wherein the fixed mold is provided with a front mold core and the pouring mechanism; the movable mould is provided with a rear mould core, an ejection mechanism and a vacuumizing mechanism for pumping air in the mould cavity. The utility model discloses, avoid because the unable quick discharge of intracavity air and the unsatisfactory problem of packing that leads to, improve production quality.

Description

Vacuumizing auxiliary injection mold structure

Technical Field

The utility model belongs to the technical field of injection mold, especially, relate to an auxiliary injection mold structure of evacuation.

Background

At present, the tie is mainly formed by injection molding of nylon 66 rubber, and is widely applied to the line tie in various industries such as electronics, automobiles, industrial equipment, daily use and the like. Because the ribbon is a long strip structure, the width and thickness of the product are far less than the length, for the ribbon with the length more than 200 mm, the flow length ratio (the ratio of the flowing length of the plastic melt to the wall thickness) is usually more than 200 (such as 200 mm flowing distance/1 mm wall thickness) due to the limitation of the use shape and the production cost, the ribbon belongs to the unconventional type thin-wall injection molding, and the problems of insufficient injection molding or serious flash often occur in the injection molding process, so the production quality is reduced.

Therefore, the prior art is to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an auxiliary injection mold structure of evacuation aims at solving the technical problem who mentions in the background art, avoids because the unable quick discharge of cavity interior air and the unsatisfactory problem of packing that leads to, improves production quality.

The utility model discloses a vacuumizing auxiliary injection mold structure, which comprises a movable mold, a fixed mold, a cooling mechanism and a pouring mechanism, wherein the fixed mold is provided with a front mold core and the pouring mechanism; the movable mould is provided with a rear mould core, an ejection mechanism and a vacuumizing mechanism for pumping air in the mould cavity.

Preferably, the vacuumizing mechanism comprises a third air path communicated with the cavity and arranged on the rear mold core, a main air path communicated with the third air path, a first air path communicated with the cavity, and vacuumizing equipment connected with the third air path, wherein the main air path and the first air path are communicated through a second air path.

The utility model discloses an injection mold structure is assisted in evacuation, beneficial effect as follows: when the ribbon die cavity forms a vacuum state, the injection molding machine starts to inject, because no air blocks in the die cavity, the molten nylon rubber can be filled in the die cavity quickly, the situation that the conventional die is not filled with the molten nylon rubber due to the fact that air in the die cavity cannot be discharged quickly is avoided, and production quality is improved.

Drawings

FIG. 1 is a front view of the structure of the vacuum assisted injection mold of the present invention;

FIG. 2 is a top view of the vacuum assisted injection mold structure of the present invention;

fig. 3 is the utility model discloses evacuation mechanism's among the supplementary injection mold structure of evacuation schematic diagram.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It is noted that relative terms such as "first," "second," and the like may be used to describe various components, but these terms are not intended to limit the components. These terms are only used to distinguish one component from another component. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention. The term "and/or" refers to a combination of any one or more of the associated items and the descriptive items.

As shown in fig. 1 and 2, fig. 1 is a front view of the structure of the vacuum-pumping auxiliary injection mold of the present invention; FIG. 2 is a top view of the vacuum assisted injection mold structure of the present invention; the utility model discloses an injection mold structure is assisted in evacuation, including movable mould 200, cover half 100, pouring mechanism 2, be provided with front mould benevolence 4 on the cover half, be provided with back mould benevolence 6 on the movable mould, be provided with ejection mechanism 8 on the back mould benevolence 6 and be used for carrying out the evacuation mechanism 9 that extracts with the interior air of die cavity, pouring mechanism 2 sets up on cover half 100. The utility model discloses an injection mold structure is assisted in evacuation, beneficial effect as follows: when the ribbon cavity 66 is in a vacuum state, the injection molding machine starts to inject, and because the cavity is not blocked by air, the molten nylon rubber can be quickly filled in the cavity, so that the situation that the conventional mold is not filled with the molten nylon rubber due to the fact that the air in the cavity cannot be quickly discharged is avoided, and the production quality is improved.

As shown in fig. 3, the vacuumizing mechanism comprises a third air path 16 which is communicated with the cavity 66 and is arranged on the rear mold core, a main air path 15 communicated with the third air path 16, a first air path 10 communicated with the cavity 66 and vacuumizing equipment 13 connected with the third air path 16, wherein the main air path 15 is communicated with the first air path through a second air path 11; the preferred embodiment defines the specific structure of the vacuum pumping mechanism, before injection molding is started, the vacuum pumping equipment 13 starts to work, and air in the cavity reaches the main air path through the first air path, the second air path and the third air path to enter the vacuum pumping equipment, so that the air is discharged out of the mold, and the cavity 66 is in a vacuum state. The mould also comprises a first sealing ring 12, a second sealing ring 14 and an ejector pin sealing sleeve 17, and external fresh air is prevented from entering the mould cavity.

As shown in fig. 1, the cooling mechanism 1 is arranged on the moving mold and comprises a water inlet and outlet joint, a cooling water path and a sealing ring. The cooling water path is a through hole processed on the die carrier, the front die core, the rear die core and the insert, and the cooling water path between different workpieces is sealed by a sealing ring to prevent water leakage. During injection molding, the mold temperature machine of the injection molding auxiliary equipment is connected with the water inlet and outlet connector through a water pipe, and cooling water with constant temperature continuously flows near a cavity during injection molding, so that the rubber material in a molten state can be rapidly cooled and solidified after injection molding. The cooling mechanism belongs to the existing equipment. The pouring mechanism consists of a hot runner, a cold runner and a pouring gate. The hot runner mainly comprises a hot nozzle, a heating ring and a temperature sensing wire. The temperature of the hot nozzle is accurately controlled at the set glue melting temperature through the heating ring and the temperature sensing line during injection molding. The rubber material passes through the hot runner and the cold runner in sequence and finally rapidly enters the cavity from the pouring gate. Cooling and solidifying the molten rubber material in the cavity to form a ribbon product; the pouring mechanism belongs to the existing equipment. The front mold core is provided with a front mold insert 5, and the rear mold core is provided with a rear mold insert 7. The ejection mechanism comprises an ejector plate, an ejector pin, an ejection guide pillar and guide sleeve and a return pin. The ejector plate is connected with an ejector rod of the injection molding machine through screw teeth. In the injection molding cycle, an ejector rod of the injection molding machine pushes an ejector plate to move forwards, an ejector pin fixed on the ejector plate ejects a finished product of the ribbon out of a partial molding cavity of a driven mold, continuous automatic production is realized, and the ejection mechanism belongs to the existing equipment.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides an injection mold structure is assisted in evacuation, a serial communication port, including movable mould and cover half, be provided with front mould benevolence and pouring mechanism on the cover half, be provided with back mould benevolence on the movable mould, ejection mechanism and be used for the evacuation mechanism of taking out the intracavity air of die cavity, evacuation mechanism includes with the communicating third gas circuit that sets up on back mould benevolence of die cavity, with the communicating main gas circuit of third gas circuit, with the communicating first gas circuit of die cavity and the evacuation equipment of being connected with the third gas circuit, main gas circuit and first gas circuit are through the second gas circuit intercommunication.