CN111168933A

CN111168933A - Injection mold convenient to stable drawing of patterns

Info

Publication number: CN111168933A
Application number: CN201811337332.3A
Authority: CN
Inventors: 朱云利
Original assignee: Xuzhou Connor Hi Tech Materials Science And Technology Co ltd
Current assignee: Xuzhou Connor Hi Tech Materials Science And Technology Co ltd
Priority date: 2018-11-12
Filing date: 2018-11-12
Publication date: 2020-05-19

Abstract

The invention discloses an injection mold convenient for stable demolding, which comprises a movable mold block and a fixed mold block, wherein the movable mold block comprises a movable base, a support plate is welded on the movable base, a cavity is formed between the movable base and the support plate, an air pump is installed in the movable base, an air bag is connected to the output end of the air pump, a pressing plate is fixedly adhered to the air bag, two abutting rods are correspondingly welded on the pressing plate, springs are sleeved on the two abutting rods, a sliding groove is formed in the inner wall of the cavity, and sliding blocks are welded at the upper end and the lower end of the pressing plate. The invention utilizes the water cooling cavity to improve the cooling and shaping efficiency of the plastic part, so that the demoulding waiting time is shortened; the temperature in the injection mold is properly adjusted through the cooling effect, so that the temperature difference between the injection mold and the environment is favorably reduced, and the air pressure in the injection mold is adjusted; the air pump is utilized to inflate the air bag to realize the horizontal movement of the abutting rod, so that the abutting rod pushes the molded plastic part, and the plastic part is stably separated from the movable mold.

Description

Injection mold convenient to stable drawing of patterns

Technical Field

The invention relates to the technical field of plastic part injection molding processing, in particular to an injection mold convenient for stable demolding.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes, and refers to that plastic slurry melted by heating is injected into a plastic groove from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification.

When the existing injection molding process and the existing mold are used, after the injection molding slurry enters a molding groove, because corresponding cooling measures are lacked, long time is needed to wait for the cooling molding of the injection molding slurry, and the temperature of the slurry can reach 200 ℃, so that the cooling efficiency is low, the time for waiting for molding is long, and the performance of a demolding process is influenced; meanwhile, when the movable mold is moved by the conventional injection mold, the movable mold is easy to vibrate integrally, and the movable mold has stronger adsorbability on the plastic part and higher separation difficulty in the process of separating the plastic part from the movable mold, so that the plastic part which is not completely molded is easy to deform and damage when being pulled outwards, thereby affecting the quality of injection products.

Disclosure of Invention

The invention aims to solve the problem that stable and quick demoulding is difficult to realize after injection moulding is formed in the prior art, so that the injection moulding efficiency and quality are influenced, and provides an injection mould convenient for stable demoulding.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an injection mold convenient to stable drawing of patterns, includes movable mould piece and cover half piece, the movable mould piece includes the moving base, the welding of moving base has the extension board, and has seted up the cavity between moving base and the extension board, install the air pump in the moving base, and be connected with the gasbag on the air pump output, and fixed being stained with the clamp plate on the gasbag, it has two to support the pole to correspond the welding on the clamp plate, and two support the pole on the cover be equipped with the spring, the spout has been seted up on the cavity inner wall, and the lower extreme all welds on the clamp plate has the slider, the support board is kept away from the welding on one side of cavity and is gone up the movable mould, the cover half piece includes fixed baseplate, the welding has the.

Preferably, the movable base is connected with an air cylinder capable of horizontally moving the movable module through a bolt, the air cylinder is installed on one side, away from the cavity, of the movable base, and the fixed module is fixedly installed through the fixed base.

Preferably, the air bag, the pressing plate, the abutting rod, the spring and the sliding block are all installed in the cavity, the support plate and the movable mold are correspondingly provided with through cavities, the air outlet is formed in the air bag, and a protrusion is welded on one side, away from the support plate, of the movable mold.

Preferably, the two sliding blocks are respectively slidably sleeved in the two sliding grooves, the two abutting rods are respectively slidably sleeved in the through cavity and penetrate through the through cavity, and two ends of the spring are respectively abutted to the pressing plate and the support plate.

Preferably, the water cooling cavity adopts an annular structure, the molding groove is positioned in the water cooling cavity, the molding groove horizontally corresponds to the protrusion on the movable mold, and the fixed mold is provided with an injection molding opening.

Preferably, the upper end and the lower end of the water cooling cavity are respectively provided with a water filling port and a water outlet, the water filling port and the water outlet are respectively in threaded connection with a leather plug, and the injection molding port is communicated with the molding groove.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, the air pump is arranged in the movable mould, the air pump is used for supplementing air to the air bag, so that the volume expansion of the air bag is realized, the pushing and pushing of the abutting rods are realized, the abutting rods slide outwards in the movable mould, and the molded plastic part is pushed through the abutting rods, so that the plastic part can be separated from the movable mould in the uniform-speed extrusion process of the two abutting rods.

2. According to the invention, the water cooling cavity is arranged in the fixed die, so that the water cooling cavity wraps the molding groove, and the plastic part is rapidly molded in the molding groove by utilizing the cooling effect in the water cooling cavity, so that the demolding waiting time is shortened; and the cooling effect of water-cooling chamber is favorable to adjusting the inside temperature of the module of moulding plastics, is favorable to reducing the mutual adsorption power between cover half and the movable mould, is favorable to reducing the drawing of patterns degree of difficulty.

In conclusion, the cooling and shaping efficiency of the plastic part is improved by utilizing the water cooling cavity, so that the demoulding waiting time is shortened; the temperature in the injection mold is properly adjusted through the cooling effect, so that the temperature difference between the injection mold and the environment is favorably reduced, and the air pressure in the injection mold is adjusted; the air pump is utilized to inflate the air bag to realize the horizontal movement of the abutting rod, so that the abutting rod pushes the molded plastic part, and the plastic part is stably separated from the movable mold.

Drawings

FIG. 1 is a schematic view of a mold clamping structure of an injection mold facilitating stable demolding according to the present invention;

FIG. 2 is a schematic view of a mold opening structure of an injection mold facilitating stable mold release according to the present invention;

fig. 3 is an enlarged schematic view of a portion a of the injection mold facilitating stable demolding according to the present invention.

In the figure: the device comprises a movable base 1, a fixed base 2, a support plate 3, a cavity 4, an air pump 5, an air bag 6, a pressure plate 7, a pushing rod 8, a spring 9, a sliding chute 10, a sliding block 11, a through cavity 12, a movable mold 13, a fixed mold 14, a water cooling cavity 15, a plastic groove 16, an injection molding opening 17 and an air outlet 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, an injection mold convenient for stable demolding comprises a movable mold block and a fixed mold block, wherein the movable mold block comprises a movable base 1, a support plate 3 is welded on the movable base 1, a cavity 4 is formed between the movable base 1 and the support plate 3, an air pump 5 is installed in the movable base 1, the air pump 5 is a miniature air pump with a product model of VAY8828, an air bag 6 is connected to the output end of the air pump 5, a pressing plate 7 is fixedly adhered to the air bag 6, two abutting rods 8 are correspondingly welded on the pressing plate 7, the abutting rods 8 can be made of silica gel with small density and soft texture, so that the serious abrasion with a plastic part is avoided, the plastic part is protected, springs 9 are sleeved on the two abutting rods 8, a chute 10 is formed in the inner wall of the cavity 4, sliding blocks 11 are welded at the upper end and the lower end of the pressing plate 7, the sliding blocks 11 have a supporting and limiting effect on the pressing plate, a movable die 13 is welded on one side, far away from the cavity 4, of the support plate 3, the fixed die block comprises a fixed base 2, a fixed die 14 is welded on the fixed base 2, and a water cooling cavity 15 and a molding groove 16 are formed in the fixed die 14 respectively.

It should be noted that: the cooling liquid is filled in the water cooling cavity 15 and is ethylene glycol cooling liquid, so that the freezing point is low, the use safety is high, the cost is low, and the replacement frequency is low.

Bolted connection has the cylinder that can make movable mould piece horizontal migration on the moving base 1, and the cylinder is installed and is kept away from on one side of cavity 4 in moving base 1, the cover half piece passes through fixed baseplate 2 fixed mounting, gasbag 6, clamp plate 7, support pole 8, spring 9 and slider 11 are all installed in cavity 4, it leads to chamber 12 to have seted up to correspond in extension board 3 and the movable mould 13, and seted up gas outlet 18 on the gasbag 6, gas in the gasbag 6 is discharged through gas outlet 18, can realize supporting pole 8's shrink, the welding has the arch on one side that extension board 3 was kept away from to movable mould 13, the arch has certain design effect, and can make the piece of moulding depend on movable mould 13 more firmly.

The two sliding blocks 11 are respectively sleeved in the two sliding grooves 10 in a sliding manner, the two abutting rods 8 are respectively sleeved in a sliding manner and penetrate through the through cavities 12, two ends of the spring 9 abut against the pressing plate 7 and the supporting plate 3 respectively, the plastic grooves 16 horizontally correspond to the protrusions on the movable mold 13, the fixed mold 14 is provided with an injection molding opening 17, and the injection molding opening 17 is externally connected with an injection molding slurry injection device.

Further, the injection molding port 17 is arranged on the fixed module, so that the stability of the injection molding slurry is improved, and the influence of the movement of the movable module on the injection molding of the slurry is avoided.

The upper end and the lower end of the water cooling cavity 15 are respectively provided with a water filling port and a water outlet, the water filling port and the water outlet are both in threaded connection with leather plugs, the cooling liquid is convenient to replace periodically, and the injection molding port 17 is communicated with the molding groove 16.

The invention can be illustrated by the following operating modes:

in an initial state, as shown in fig. 1, under the extending action of the output end of the cylinder, the whole movable module is driven to move towards one side of the fixed module, at this time, no gas is filled in the air bag 6 in the cavity 4, and one ends of the two abutting rods 8 are embedded in the through cavity 12 under the elastic support of the spring 9.

The first step is as follows: closing a water outlet of the water-cooling cavity 15, adding cooling liquid into the water-cooling cavity 15 through a water filling port, and sealing the water filling port; and ensures that the air outlet on the air bag 6 is in a sealed state.

The second step is that: when the movable mold 13 in the movable mold block abuts against the fixed mold 14 in the fixed mold block, the molding groove 16 is made to correspond to the protrusion on the movable mold 13.

The third step: the injection molding slurry is filled into the molding groove 16 through the injection molding port 17, so that the slurry flows and is filled in the molding groove 16, and in the process, the cooling liquid in the water cooling cavity 15 cools the plastic part in the molding groove 16, so that the plastic part can be rapidly cooled in the molding groove 16, and the molding efficiency of the plastic part is accelerated.

The fourth step: when the plastic part is completely shaped, the movable module is driven by the cylinder to move to one side far away from the fixed module, and the plastic part is connected with the movable mold 13; by turning on the air pump 5, the air pump 5 starts to supplement air into the air bag 6, so that the air bag 6 is continuously inflated, and in the process, the pressing plate 7 is pushed.

The fifth step: when gasbag 6 supports the pressure to clamp plate 7, make clamp plate 7 drive slider 11 and use spout 10 to remove to one side that is close to the fixed module as the fulcrum, clamp plate 7 supports the pressure to spring 9 with support pole 8, make spring 9 atress condensation, support pole 8 simultaneously and remove to one side that is close to the fixed module in leading to chamber 12, when support pole 8 keep away from the one end of clamp plate 7 and extend to and lead to chamber 12 outside, extrude the plastic part of depending on movable mould 13, make the plastic part drop from movable mould 13.

After the plastic part is separated from the movable die 13, the air outlet on the air bag 6 is opened to exhaust the air in the air bag 6, the air bag 6 loses the supporting function, and the abutting rod 8 is recovered to the through cavity 12 again under the elastic support of the spring 9.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The injection mold convenient for stable demolding comprises a movable mold block and a fixed mold block, and is characterized in that the movable mold block comprises a movable base (1), a support plate (3) is welded on the movable base (1), a cavity (4) is formed between the movable base (1) and the support plate (3), an air pump (5) is installed in the movable base (1), an air bag (6) is connected to the output end of the air pump (5), a pressing plate (7) is fixedly adhered to the air bag (6), two supporting rods (8) are correspondingly welded on the pressing plate (7), springs (9) are sleeved on the two supporting rods (8), a sliding groove (10) is formed in the inner wall of the cavity (4), sliding blocks (11) are welded at the upper end and the lower end of the pressing plate (7), a movable mold (13) is welded on one side, far away from the cavity (4), of the support plate (3), and the fixed mold block comprises a fixed, the fixed base (2) is welded with a fixed die (14), and a water cooling cavity (15) and a molding groove (16) are respectively formed in the fixed die (14).

2. An injection mold facilitating stable demolding according to claim 1, wherein the movable base (1) is bolted with a cylinder capable of horizontally moving the movable module, the cylinder is installed on one side of the movable base (1) far away from the cavity (4), and the fixed module is fixedly installed through the fixed base (2).

3. The injection mold convenient to demold stably according to claim 1, wherein the air bag (6), the pressing plate (7), the abutting rod (8), the spring (9) and the sliding block (11) are all installed in the cavity (4), the support plate (3) and the movable mold (13) are correspondingly provided with through cavities (12), the air bag (6) is provided with an air outlet (18), and one side of the movable mold (13) far away from the support plate (3) is welded with a protrusion.

4. An injection mold facilitating stable demolding according to claim 3, wherein the two sliding blocks (11) are respectively slidably sleeved in the two sliding grooves (10), the two abutting rods (8) are respectively slidably sleeved in and penetrate through the through cavities (12), and two ends of the spring (9) respectively abut against the pressing plate (7) and the support plate (3).

5. An injection mold convenient for stable demolding as claimed in claim 3, wherein the water cooling cavity (15) is of an annular structure, the molding groove (16) is located in the water cooling cavity (15), the molding groove (16) horizontally corresponds to the protrusion on the movable mold (13), and the fixed mold (14) is provided with the injection molding opening (17).

6. The injection mold convenient for stable demolding as claimed in claim 5, wherein the water cooling cavity (15) is provided with a water injection port and a water discharge port at the upper end and the lower end respectively, the water injection port and the water discharge port are both connected with a leather plug in a threaded manner, and the injection port (17) is communicated with the molding groove (16).