CN205522298U - High -precision injection mold - Google Patents

Abstract

The utility model discloses a high -precision injection mold, but movable mould board and fixed die plate including range upon range of setting and relative movement, decide template settings in movable mould board top, be provided with the core of two evaginations on the movable mould board, be provided with on the fixed die plate with the cavity of the corresponding indent of core, movable mould board and fixed die plate are closed the core constitutes the chamber of moulding plastics independent more than two with the cavity, its characterized in that, it has first cooling water course to move template settings, and it has second cooling water course to decide template settings, first cooling water course heliciform is surrounded inside the core, second cooling water course spiral surround in on the lateral wall of cavity. The utility model discloses high -precision injection mold has improved the cooling efficiency of movable mould board with the fixed die plate, and it is anti - excessive that the raw and other materials that can prevent to mould plastics pour into the back into, guarantees sufficient shot and precision to improve the injection moulding product quality.

Description

A high-precision injection mold

technical field

The utility model relates to the technical field of molds, in particular to a high-precision injection mold.

Background technique

Mold is an important technological foundation of the manufacturing industry. In my country, mold manufacturing belongs to the special equipment manufacturing industry. Injection mold is a tool for producing plastic products; it is also a tool for giving plastic products complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it refers to injecting the heated and melted material into the mold cavity by high pressure, and after cooling and solidifying, a molded product is obtained. In order to ensure that the heated and melted material can completely fill the injection cavity in the mold, the injection molding machine must use a relatively large injection pressure for injection molding. However, many existing mold injection molding machines do not cooperate closely with the gate of the mold. When the injection pressure is too high, raw materials will overflow, resulting in insufficient injection pressure and insufficient material injection, which will affect the quality of injection molding products. Moreover, since during the injection molding process, the injection molding raw materials are heated to a certain temperature by the injection molding machine and then injected into the injection mold, in order to prevent the raw materials from overflowing after injection molding, the injection mold needs to be equipped with cooling pipes to cool down the raw materials. In the typical injection mold, the cooling water pipe is set on the fixed template to cool down, the cooling rate is low, and there is still the phenomenon of raw material backflow, especially when the temperature of the raw material is high, which affects the precision of the injection molded product.

Utility model content

The technical problem to be solved by the utility model is to provide a high-precision injection mold, which is used to solve the problem of poor precision of injection molding finished products of the injection mold in the prior art.

The utility model is achieved in that:

A high-precision injection mold includes a movable template and a fixed template that are arranged in layers and can move relative to each other. The fixed template is arranged above the movable template. The concave cavity corresponding to the core, the movable template and the fixed template close the core and the cavity to form more than two independent injection molding cavities, the movable template is provided with a first cooling water channel, and the fixed template A second cooling water channel is provided; the first cooling water channel spirally surrounds the inside of the core, and the second cooling water channel spirally surrounds the side wall of the chamber.

Further, the side wall of the movable template is provided with a water inlet port and a water outlet port of the first cooling channel, and the side of the fixed template is provided with a water inlet port and a water outlet port of the second cooling channel; the water inlet port and The water outlet interface is a quick interface.

Further, the fixed template is provided with a main flow channel and branch flow channels connected to the main flow channel and each injection cavity, the fixed template is arranged on the first backing plate, and the first backing plate is fixed on the fixed mold seat plate, the The first backing plate and the fixed mold seat plate are provided with a channel connected with the main flow channel, and a trumpet-shaped sprue sleeve connected with the main flow channel is arranged in the channel; the butt joint interface between the trumpet-shaped sprue sleeve and the injection molding machine It is a tapered mouth with a large top and a small bottom, and an elastic sealing layer is provided on the inner surface of the tapered mouth.

Further, it also includes a movable mold base plate, a second backing plate, a push plate and a guide column; the movable mold base plate and the fixed mold base plate are arranged parallel to each other, and the guide column is vertically arranged between the movable mold base plate and the fixed mold base between the plates; the movable template is arranged on the second backing plate, the second backing plate is slidably arranged on the guide column, and the push plate is arranged between the second backing plate and the movable mold seat plate.

Further, the elastic sealing layer is made of rubber.

The utility model has the following advantages: the high-precision injection mold of the utility model includes a movable template and a fixed template, and cooling water channels are arranged in the fixed template and the movable template, wherein the cooling water channel on the fixed template spirally surrounds the cavity On the side wall, the cooling water on the movable template spirally surrounds the inside of the core, so that the cooling water channels are distributed on the inner and outer sides of the injection cavity, which increases the heat exchange area between the cooling water channels and the high-temperature raw materials in the injection cavity, making it fast Cooling can effectively prevent the phenomenon of high-temperature raw materials from overflowing after injection molding, ensure the injection volume and injection accuracy of raw materials, and improve the precision of finished products of injection molds.

Description of drawings

Fig. 1 is the structural representation of the high-precision injection mold of the utility model embodiment;

Fig. 2 is the cross-sectional view of the movable template in the high-precision injection mold of the utility model embodiment;

Fig. 3 is the cross-sectional view of the fixed template in the high-precision injection mold of the utility model embodiment;

FIG. 4 is a schematic structural view of the sprue sleeve in this embodiment.

Label description:

1. Moving formwork; 2. Fixed formwork; 3. Second backing plate; 4. Moving formwork seat plate; 5. First backing plate; 6. Fixed formwork seat plate; 7. Horn-shaped gate sleeve; 8. Push plate ;11, core; 12, first cooling water channel; 13, water inlet interface; 14, water outlet interface; 21, main channel; 22, branch flow channel; 23, injection cavity; 24, chamber; 25, second cooling Water channel; 26, water inlet interface; 27, water outlet interface; 31, guide column; 71, interface; 72, elastic sealing layer.

detailed description

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1, the embodiment of the utility model, a high-precision injection mold, the injection mold includes a movable template 1 and a fixed template 2, the fixed template 2 is arranged above the movable template 1, and the movable template 1 is provided with two A convex core 11, a concave cavity 24 corresponding to the core 11 is provided on the fixed plate 2, and the core 11 and the cavity form when the movable plate 1 and the fixed plate 2 are closed. More than two independent injection molding cavities 23 .

2 and 3, the movable template 1 is provided with a first cooling channel 12, and the fixed template 2 is provided with a second cooling channel 25; the first cooling channel 12 spirally surrounds the inside of the core 11, the The second cooling channel 15 spirally surrounds the side wall of the chamber 24 .

A water inlet 13 and a water outlet 14 of the first cooling channel 12 are provided on the side wall of the movable template 1 , and a water inlet 26 and a water outlet 27 of the second cooling channel 25 are provided on the side of the fixed template 2 . In this implementation, in order to facilitate connection with an external cooling water supply device, the water inlet ports 13 and 26 and the water outlet ports 14 and 27 are quick ports.

In this embodiment, the cooling water channel on the fixed template 2 spirally surrounds the side wall of the chamber, and the cooling water channel on the movable template 1 spirally surrounds the inside of the core 11, so that the cooling water channel is distributed inside and outside the injection cavity 23 On both sides, the heat exchange area between the cooling water channel and the high-temperature raw material in the injection cavity is increased to make it cool down quickly, effectively preventing the high-temperature raw material from overflowing after injection molding, ensuring the injection amount and injection accuracy of the raw material, and improving the precision of the injection mold. Finished precision.

In this embodiment, a sprue 21 and a branch flow path 22 connected to the sprue 21 and each injection cavity 23 are provided on the fixed platen 2 , and the feed end of the sprue 21 is provided with a trumpet-shaped sprue sleeve 7 . Please refer to FIG. 4 , the interface 71 between the trumpet-shaped sprue bushing 7 and the injection molding machine is a tapered mouth with a large upper part and a smaller lower part, and an elastic sealing layer 72 is provided on the inner surface of the tapered port.

Specifically, in this embodiment, the material of the elastic sealing layer 72 is rubber. In other embodiments, the elastic sealing layer 72 may also be made of other elastic materials such as silica gel.

Wherein, the fixed template 2 is arranged on the first backing plate 5, and the first backing plate 5 is fixed on the fixed mold seat plate 6, and the first backing plate 5 and the fixed mold seat plate 2 are provided with a sprue connected to the sprue. channel, the horn-shaped sprue bushing 7 is set in the channel.

The injection mold also includes a movable mold seat plate 4, a second backing plate 3, a push plate 8 and a guide column 31; Between the mold base plate 4 and the fixed mold base plate 6; the movable template 1 is arranged on the second backing plate 3, and the movable template 1, the second backing plate 3 and the movable mold base plate 4 are slidably arranged on the guide column 31 Above, the push plate 8 is arranged between the second backing plate 3 and the movable mold seat plate 4, and a plurality of push rods are arranged on the push plate 8, and the ends of the push rods are connected to the injection molding cavity. Before injection molding, the movable template 1 is pushed to the fixed template 2 to form the injection molding cavity 23 for injection molding; during injection molding, the plastic outlet of the injection molding machine is docked with the interface 71 of the sprue sleeve, and injection molding is inward; after the injection molding is completed, through The finished product is released from the injection molding cavity by the push plate 8 and the push piece rod thereon (promptly demoulding). In this injection mold, the interface of the sprue sleeve is tapered, which can be adapted to different types of injection molding machines and is easy to locate, and an elastic sealing layer is set on the inner surface of the interface, thereby improving the distance between the injection molding machine and the injection mold. Sealing can prevent the injection molding material from overflowing, ensure sufficient injection molding pressure, and improve the quality of injection molding products.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent shape or structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related Technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (5)

1. a high-precision injection molding mould, is arranged and relatively-movable moving platen and solid plate including stacking, Described solid plate is arranged at above moving platen, moving platen is provided with the core of two evaginations, solid plate sets It is equipped with the chamber of the indent corresponding with described core, described moving platen and solid plate and closes described core and chamber Room constitutes the injection molding cavity of two or more independence, it is characterised in that described moving platen is provided with the first cooling water channel, Solid plate is provided with the second cooling water channel；

Described first cooling water channel helical form is surrounded on inside core, described second cooling water channel spiral surrounding in On the sidewall of described chamber.

High-precision injection molding mould the most according to claim 1, it is characterised in that the side of described moving platen Wall is provided with water inlet interface and the water outlet mouthpiece of the first cooling water channel, and the side of described solid plate is provided with second The water inlet interface of cooling water channel and water outlet mouthpiece；Described water inlet interface and water outlet mouthpiece are fast interface.

High-precision injection molding mould the most according to claim 1, it is characterised in that be provided with on solid plate Sprue and be connected to sprue and the branch flow passage of each injection molding cavity, described solid plate is arranged on the first backing plate, First backing plate is fixed on top clamping plate, and described first backing plate is connected with sprue with being provided with on top clamping plate Passage, be provided with the hone gate set being connected with sprue in described passage；

Described hone gate set is up big and down small bell with the interface docked of injection machine, bell Medial surface is provided with elastic sealing layer.

High-precision injection molding mould the most according to claim 3, it is characterised in that also include Bottom clamp plate, Second backing plate, push pedal and lead；

Described Bottom clamp plate is arranged in parallel with top clamping plate, and lead is vertically arranged at Bottom clamp plate with fixed Between die holder plate；

Described moving platen is arranged on the second backing plate, and the second backing plate is slidably arranged on lead, described Push pedal is arranged between the second backing plate and Bottom clamp plate.

High-precision injection molding mould the most according to claim 3, it is characterised in that described elastic sealing layer Material be rubber.