CN104669560A - Delayed demolding mold and demolding method - Google Patents

Abstract

The invention provides a delayed demolding mold and a demolding method. The delayed demolding mold comprises an upper mold and a lower mold assembly, wherein a cavity is formed in the upper mold; a core is arranged on the lower mold assembly; the lower mold assembly comprises a lower mold and a demolding plate; the demolding plate is positioned between the lower mold and the upper mold; the core fixed on the lower mold penetrates through a through hole in the demolding plate and is matched with the cavity; a guide post arranged on the lower mold penetrates through the through hole in the demolding plate and is in sliding fit with a corresponding hole in the upper mold; a first sliding mechanism is arranged between the lower mold and the demolding plate, and due to the sliding mechanism, the lower mold can slide relative to the demolding plate; and a second sliding mechanism is arranged between the demolding plate and the upper mold, and due to the sliding mechanism, the demolding plate can slide relative to the upper mold. The mold provided by the invention is simple in structure and low in cost, and an independent ejector mechanism does not need to be arranged.

Description

A kind of time delay demoulding mould and release method

Technical field

The present invention relates to technical field of mold, refer more particularly to a kind of time delay demoulding mould structure and release method thereof.

Background technology

Existing injection machine is carrying out in product die sinking process, and be all generally that counterdie drives core mobile extraction from the die cavity patrix, the injection moulded products after injection mo(u)lding is then still arranged on the core of bed die.In order to take out the injection moulded products in bed die core, must a set of independent material jacking mechanism be adopted, injection moulded products is ejected from the core bed die.Owing to needing to increase a set of material jacking mechanism being exclusively used in liftout separately, add the stroke space of whole injection-moulding device undoubtedly, thereby increase the tonnage demand of equipment and the production cost of producer.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of cost is low, the simple time delay demoulding mould of structure.

For achieving the above object, technical scheme provided by the present invention is: a kind of time delay demoulding mould, comprises patrix, lower mold assemblies, is provided with die cavity, lower mold assemblies is provided with core in described patrix:

Described lower mold assemblies comprises counterdie, stripper plate;

Stripper plate is between counterdie and patrix, and the core be fixed on counterdie coordinates with die cavity through the through hole on stripper plate;

The guide pillar be arranged on counterdie passes the through hole on stripper plate, and the hole corresponding with on patrix is slidably matched;

Be provided with the first slide mechanism between described counterdie and stripper plate, this slide mechanism makes counterdie relatively slide by stripper plate;

Be provided with the second slide mechanism between described stripper plate and patrix, this slide mechanism makes stripper plate relatively slide by patrix.

Further, the first described slide mechanism comprises slide rail, the first block and the second block, first block is arranged on a side of counterdie, and the second block is arranged on a side corresponding to stripper plate up and down mould, and slide rail is set on the first block and the second block;

Further, the second described slide mechanism comprises slide bar, fixture, and described jack rod sleeve is located in the counterbore on stripper plate, and can slide in counterbore;

Described fixture, when forming parts, is fixed in the patrix installing hole corresponding with counterbore; During the demoulding, be pulled out installing hole.

For anti-anti-slip track and mould mounting disc are interfered, the upper end of described slide rail is fixed on the first block.

For improving the reliability of fixture installation and reducing part processing cost, described fixture adopts flexible member.

For improving the stability of mould matched moulds, die sinking campaign, can multiple second slide mechanism be evenly set on mould.

Meanwhile, the present invention provides a kind of time delay release method on the basis utilizing above-mentioned mould, comprises the following steps:

Step one: pull lower mold assemblies to depart from patrix, moulding departs from core;

Step 2: stripper plate is by the second relative patrix fixed position of slide mechanism, and injection machine pulls counterdie to move, moulding departs from die cavity;

Step 3: counterdie is by the first relative stripper plate fixed position of slide mechanism, and injection machine pulls counterdie, counterdie drives the second slide mechanism to depart from patrix, moulding break away from moulds.

Compared with prior art, the present invention by setting up a set of time delay mould emptier between mold and bed die, eliminate traditional moulds and one ejecting mechanism is set separately, thus reduce the stroke space of mould and reduce the requirement of same size moulding for injection machine tonnage; Mould is in the process of carrying out mobile die sinking, and complete the automatic demoulding action of injection moulded products, production efficiency is improved simultaneously.

Accompanying drawing explanation

Fig. 1 is configuration state schematic diagram when time delay demoulding mould structure is in matched moulds in the present invention.

The structural representation that when Fig. 2 is die sinking of the present invention, lower mold assemblies is slided by the relative patrix of the second slide assemblies.

Fig. 3 is the limited configuration state schematic diagram of stripper plate.

Fig. 4 is the configuration state schematic diagram that counterdie continues by the first slide mechanism to rise.

Fig. 5 is that the fixture of the second slide mechanism is departed from the configuration state schematic diagram of patrix.

Fig. 6 is the configuration state schematic diagram that lower mold assemblies and patrix depart from completely.

Second slide mechanism cross-section structure view when Fig. 7 is Fig. 1 state.

Second slide mechanism cross-section structure view when Fig. 8 is Fig. 2 state.

Second slide mechanism cross-section structure view when Fig. 9 is Fig. 3 state.

Detailed description of the invention

Below in conjunction with specific embodiment, the invention will be further described:

Please refer to Fig. 1, Fig. 4, Fig. 6 and Fig. 7, a kind of time delay demoulding mould, comprise patrix 1 and lower mold assemblies 2, in patrix, be provided with die cavity 101, lower mold assemblies 2 is provided with core 6;

Lower mold assemblies 2 comprises counterdie 201 and stripper plate 202;

Stripper plate 202 is between counterdie 201 and patrix 1, and the core 6 be fixed on counterdie 201 coordinates with die cavity 101 through the through hole 2021 on stripper plate 202;

Four guide pillars 4 be arranged on counterdie 201 pass the through hole 2022 on stripper plate, and the hole 102 corresponding with on patrix 1 is slidably matched;

Be provided with the first slide mechanism 3 between counterdie 201 and stripper plate 202, this slide mechanism 3 is made up of the first block 302, second block 303 be separately positioned on counterdie and stripper plate and slide rail 301;

Please refer to Fig. 4 and Fig. 7, the second slide mechanism 5 is provided with between stripper plate 202 and patrix 1, this slide mechanism 5 comprises slide bar 501, fixture 502, slide bar 501 is set in the counterbore 2023 on stripper plate 202, and can slide in counterbore 2023, wherein fixture 502 is elastic component, is set in the end of slide bar 501, by the precession of trip bolt 503 select adjustment with installing hole 101 coordinate degree of tightness.

The course of work of this mould:

Please refer to Fig. 1 and Fig. 7, during matched moulds, counterdie 201 is near stripper plate 202, and the fixture 502 of the second slide mechanism 5 by the active force of counterdie 1 press-in installing hole 101, and forms interference fit.

Please refer to Fig. 2,3,4 and Fig. 8, the first step of the demoulding, lower mold assemblies 2, under the pulling of injection machine, departs from patrix a little, and because the smoothness of die cavity inner surface is higher than the smoothness of core inner surface, now moulding 7 will depart from die cavity with core; When moulding 7 does not depart from core 6, under the effect of moulding, counterdie 201 and stripper plate 202 are close together along slide bar 501 upward sliding of the second slide mechanism 5.

Please refer to Fig. 3,4,5 and Fig. 9, the second step of the demoulding, lower mold assemblies 2 under the pulling of injection machine, continuation moves, now the face 5011 of the slide bar 501 of the second slide mechanism 5 touches the counterbore step surface 2024 on stripper plate, due to the fixture 502 of the second slide mechanism 5 and the active force of hole 101 interference fit, stripper plate 202 and patrix 1 stop relative motion;

Injection machine continue pull under, counterdie 201 produces relative sliding with stripper plate 202 by the first slide mechanism, and in this process, moulding 7 is stopped by stripper plate 2 when moving with core 6, thus disengaging core 6.

Please refer to Fig. 5,6 and 9, when injection machine drives counterdie to continue motion, when reaching the extreme position of the first slide mechanism, now the active force of injection machine overcomes the interference power of the second slide mechanism fixture 502 and installing hole 101, thus stripper plate 202 is separated completely with patrix 1, complete die sinking action, when lower mold assemblies continues to run LAP, moulding comes off core, and die sinking process completes.

In this embodiment, interfere for avoiding slide rail 301 and injection machine mounting disc (not shown) to produce, the upper end of slide rail 301 is fixedly connected with the first block 302.

For ease of adjustment and installation, in the present embodiment, the fixture 502 of the second slide mechanism have employed flexible member, also according to circumstances can adopt the part of other material or structure.

The examples of implementation of the above are only the preferred embodiment of the present invention, not limit practical range of the present invention with this, therefore the change that all shapes according to the present invention, principle are done, all should be encompassed in protection scope of the present invention.

Claims (7)

1. a time delay demoulding mould, comprises patrix (1), lower mold assemblies (2), and described patrix is provided with die cavity in (1), and (2) are provided with core to described lower mold assemblies, it is characterized in that:

Described lower mold assemblies (2) comprises counterdie (201) and stripper plate (202);

Described stripper plate (202) is positioned between described counterdie (201) and described patrix (1), described core is fixed on described counterdie (201), and described core coordinates with described die cavity through the through hole (2021) on described stripper plate (202);

Be arranged on guide pillar (4) on counterdie (201) through the through hole (2022) on stripper plate (202), be slidably matched with the upper corresponding hole (102) of patrix (1);

Be provided with the first slide mechanism (3) between described counterdie (201) and stripper plate (202), this slide mechanism makes counterdie (201) relatively slide by stripper plate (202);

Be provided with the second slide mechanism (5) between described stripper plate (202) and patrix (1), this slide mechanism makes stripper plate (202) relatively slide by patrix (1).

2. a kind of time delay demoulding mould according to claim (1), is characterized in that:

Described the first slide mechanism (3) comprises slide rail (301), the first block (302) and the second block (303), first block is arranged on a side of counterdie (201), second block is arranged on a side corresponding to stripper plate (202) up and down mould (201), and slide rail is set on the first block and the second block.

3. a kind of time delay demoulding mould according to claim (1), is characterized in that:

Described the second slide mechanism (5) comprises slide bar (501), fixture (502), described slide bar (501) is set in the counterbore (2022) on stripper plate (202), and can slide in counterbore (2022);

Described fixture (502), when moulding (7) is shaping, is fixed in patrix (1) installing hole (101) corresponding with counterbore (2022); During the demoulding, be pulled out die cavity (101).

4. a kind of time delay demoulding mould according to claim (3), is characterized in that the upper end of described slide rail (301) is fixed on the first block (302).

5. a kind of time delay demoulding mould according to claim (3), is characterized in that described fixture (502) is flexible member.

6. a kind of time delay demoulding mould according to claim (3), is characterized in that arranging multiple second slide mechanism (5).

7. utilize a release method for any time delay demoulding mould in claim (1) ~ (5), it is characterized in that comprising the following steps:

Step one: pull lower mold assemblies to depart from patrix, moulding departs from die cavity;

Step 2: stripper plate is by the second relative patrix fixed position of slide mechanism, and injection machine pulls counterdie to move, moulding departs from die cavity;

Step 3: counterdie is by the first relative stripper plate fixed position of slide mechanism, and injection machine pulls counterdie, counterdie drives the second slide mechanism to depart from patrix, moulding break away from moulds.