Rapid forming type injection mold

Abstract

The utility model relates to the field of injection molds, and discloses a rapid forming type injection mold, a fixed mold is mounted above a base, a movable mold is arranged at the upper end of the fixed mold in a vertical sliding manner, and a gap is formed between the inner wall of a lower forming mold seat and the outer wall of a convex mold seat to form a liquid injection cavity I; a second liquid injection cavity is formed between the upper forming mold base and the mold cavity, the upper forming mold base is arranged below the movable mold, the second liquid injection cavity is formed between the upper forming mold base and the movable mold, the lower forming mold base is arranged above the fixed mold, and a first liquid injection cavity is formed between the lower forming mold base and the fixed mold. The first liquid injection cavity and the second liquid injection cavity can be filled with high-temperature gas or cooling liquid according to needs, the high-temperature gas can heat the lower forming die base and the upper forming die set, the situation that cavity channels are not completely filled due to cooling of injected materials is avoided, the cooling liquid can enable injection molded parts to be rapidly cooled and solidified, and the forming quality and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold field especially relates to a quick forming type injection mold. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic product, generally by two parts of fixed mould and movable mould, movable mould is installed on the moving template of injection molding machine, fixed mould is installed on the fixed template of injection molding machine, and movable mould and fixed mould during injection molding.

[0003] During injection molding, the heated and melted plastic is generally injected into the cavity formed by movable mould and fixed mould by injection molding machine high pressure, the temperature of plastic will gradually reduce in the process of injection molding, which will cause the flow speed of plastic to slow down, and the flow effect will also be poor, and then the phenomenon of local position not filled in cavity is prone to appear, and after processing is completed, the plastic liquid is usually formed by waiting for natural cooling, the waiting time is long, and the forming speed is slow.Therefore, we design a kind of quick forming type injection mold. UTILITY MODEL CONTENTS

[0004] To solve the technical problem that the temperature of plastic will gradually reduce in the process of injection molding, which will cause the flow speed of plastic to slow down, the utility model provides a kind of quick forming type injection mold.

[0005] The utility model discloses the following technical scheme is realized: a kind of quick forming type injection mold, including base, the base upper installation has fixed mould, the fixed mould method four corner places respectively are provided with guide column, the upper end of fixed mould is provided with movable mould with sliding, and movable mould and guide column are slidably connected;

[0006] The upper end of fixed mould is integrally formed with convex mold base in middle, the convex mold base is installed with lower forming mold seat outside, and the connecting portion of lower forming mold seat and fixed mould is sealed design, and there is gap between the inner wall of lower forming mold seat and the outer wall of convex mold base to form injection cavity one;

[0007] The lower part of movable mould is recessed and forms the cavity matched with lower forming mold seat, and the upper end of movable mould is provided with upper forming mold seat, and the connecting portion of upper forming mold seat and movable mould is sealed design, and there is injection cavity two between upper forming mold seat and cavity.

[0008] As further improvement of the above scheme, the inner part of the front and rear sides of the outer part of movable mould is respectively provided with upper liquid discharge pipe and upper liquid inlet pipe, and the inner part of injection cavity two is communicated with upper liquid discharge pipe and upper liquid inlet pipe, the rear end of the bottom end of the inner part of injection cavity two is higher than the front side, and the height gradually decreases from rear to front, wherein the inner end of upper liquid discharge pipe is placed below injection cavity two, and the inner end of upper liquid inlet pipe is placed above injection cavity two, so that the cooling liquid in the inner part of injection cavity two is discharged.

[0009] The upper forming die base and the mold cavity are also provided with a plurality of uniformly distributed reinforcing ribs one, the design of the reinforcing ribs one increases the strength of the upper forming die base, and deformation does not occur when the injection is pressurized.

[0010] As a further improvement of the above scheme, the lower liquid outlet pipe and the lower liquid inlet pipe are respectively arranged in the front and rear sides of the outer part of the fixed mold, the lower liquid outlet pipe and the lower liquid inlet pipe are both in communication with the inside of the liquid injection cavity one, the bottom end of the inside of the liquid injection cavity one is higher at the rear end than at the front side, and the height gradually decreases from the rear to the front, wherein the inner end of the lower liquid outlet pipe is placed below the liquid injection cavity one, and the inner end of the lower liquid inlet pipe is placed above the liquid injection cavity one, which facilitates the discharge of the cooling liquid inside the liquid injection cavity one;

[0011] The lower forming die base inner wall and the convex mold group outer wall are also provided with a plurality of uniformly distributed reinforcing ribs two, the design of the reinforcing ribs two increases the strength of the lower forming die base, and deformation does not occur when the injection is pressurized.

[0012] As a further improvement of the above scheme, the upper end of the movable mold is provided with a feeding cavity, and the bottom end of the feeding cavity is in communication with the upper forming die base, a feeding port is arranged above the feeding cavity, the feeding port is connected with the external injection pipe through a screw, and then the molten material is injected into the inner wall of the injection mold.

[0013] As a further improvement of the above scheme, the fixed mold is provided with four groups of uniformly distributed guide blocks, each group of guide blocks includes two symmetrically arranged guide blocks, a side edge forming mold is slidingly arranged between the two guide blocks of the same group, and offset holes are formed through the side edge forming mold from top to bottom;

[0014] The movable mold is provided with four offset columns corresponding to the side edge forming mold, and the offset columns and the offset holes are both designed to be inclined, the side surface of the injection molded part is formed with a recessed notch, when the movable mold and the fixed mold are in contact, the offset columns are placed in the offset holes, at this time, the side edge forming mold is placed on the side surface of the lower forming die base and is in contact with the side surface of the upper forming die base, after injection, the side surface of the injection molded part is formed with a corresponding notch, and when the movable mold moves upward and separates from the fixed mold, the offset columns will make the side edge forming mold move outward synchronously, thereby facilitating the separation of the side edge forming mold from the injection molded part and facilitating the separation of the lower mold.

[0015] As further improvement of the above scheme, the lower molding die base is provided with demolding holes one on the upper left and right sides, and is provided with demolding holes two on the upper front and rear sides, the demolding holes one and two extend downward and penetrate the fixed die, the inside of the base is provided with a lifting plate which slides up and down, the lifting plate is provided with demolding columns one and two which respectively slide up and down in the demolding holes one and two, the lifting plate is connected with an external lifting device, when the movable die contacts the fixed die, the top of the demolding columns one and two is flush with the outside of the lower molding die base, and the two are designed to be sealed, after injection molding is completed, the movable die moves away from the fixed die, the lifting plate moves up under the action of the lifting device, the demolding columns one and two move up synchronously, so that the injection molded part moves upward and separates from the fixed die, facilitating the rapid demolding of the injection molded part.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1、The utility model discloses a lower molding die base is provided with the upper molding die base below, and the upper molding die base and the movable die form injection cavity no.

[0018] 2、A plurality of demolding columns one and two are arranged in the lower molding die base and slide up and down, after the injection molded part is formed and solidified, the demolding columns one and two can move the injection molded part upward and separate from the fixed die, facilitating the rapid demolding of the injection molded part and improving the injection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model provides a kind of overall structure schematic diagram of quick forming type injection mold;

[0020] Figure 2 The sectional view schematic diagram of fixed die in it; Figure 1

[0021] Figure 3 The sectional view schematic diagram of movable die in it; Figure 1

[0022] Figure 4 The structural schematic diagram of fixed die in it; Figure 1

[0023] Figure 5 The rear side structural schematic diagram of it. Figure 1

[0024] Main symbol explanation:​​​​

[0025] 1, fixed mold; 11, guide block; 12, side forming mold; 13, offset hole; 14, convex mold base; 2, base; 3, lower forming mold base; 31, injection cavity one; 32, demolding hole one; 33, demolding hole two; 4, guide column; 5, movable mold; 51, feed inlet; 52, feed cavity; 53, offset column; 6, upper liquid discharge pipe; 61, upper liquid inlet pipe; 7, lower liquid discharge pipe; 71, lower liquid inlet pipe; 8, lifting plate; 81, demolding column one; 82, demolding column two; 9, upper forming mold base; 91, injection cavity two. DETAILED DESCRIPTION

[0026] In the following, the utility model is further described in combination with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.

[0027] Embodiment:

[0028] Please combine Figures 1-5 The quick forming type injection mold of the embodiment comprises a base 2, a fixed mold 1 is installed above the base 2, guide columns 4 are arranged at four corner positions of the fixed mold 1, a movable mold 5 is arranged in a sliding manner on the upper end of the fixed mold 1, and the movable mold 5 is in sliding fit with the guide columns 4;

[0029] A convex mold base 14 is integrally formed at the middle position of the upper end of the fixed mold 1, a lower forming mold base 3 is installed outside the convex mold base 14, the connection position of the lower forming mold base 3 and the fixed mold 1 is designed to be sealed, and a gap is formed between the inner wall of the lower forming mold base 3 and the outer wall of the convex mold base 14 to form an injection cavity one 31;

[0030] A mold cavity matched with the lower forming mold base 3 is formed in a recessed manner below the movable mold 5, an upper forming mold base 9 is installed in the mold cavity, and the connection position of the upper forming mold base 9 and the movable mold 5 is designed to be sealed, and an injection cavity two 91 is formed between the upper forming mold base 9 and the mold cavity.

[0031] Upper liquid discharge pipes 6 and upper liquid inlet pipes 61 are arranged in the inner portions of the front and rear sides of the movable mold 5, the upper liquid discharge pipes 6 and the upper liquid inlet pipes 61 are in communication with the interior of the injection cavity two 91, the bottom end of the interior of the injection cavity two 91 is higher at the rear end than at the front side, and the height gradually decreases from the rear end to the front end, wherein the inner end of the upper liquid discharge pipe 6 is arranged below the injection cavity two 91, and the inner end of the upper liquid inlet pipe 61 is arranged above the injection cavity two 91, so that the cooling liquid in the interior of the injection cavity two 91 can be conveniently discharged.

[0032] A plurality of uniformly distributed reinforcing ribs one are further arranged between the upper forming mold base 9 and the mold cavity, the reinforcing ribs one increase the strength of the upper forming mold base 9, and the upper forming mold base 9 will not be deformed when pressure is applied during injection molding.

[0033] The lower liquid outlet pipe 7 and the lower liquid inlet pipe 71 are respectively arranged on the front and rear sides of the outer part of the fixed mold 1, and are in communication with the inside of the liquid injection cavity 1, the bottom end of the inside of the liquid injection cavity 1 is higher at the rear end than at the front side, and the height gradually decreases from the rear to the front, wherein the inner end of the lower liquid outlet pipe 7 is arranged below the liquid injection cavity 1, and the inner end of the lower liquid inlet pipe 71 is arranged above the liquid injection cavity 1, so as to facilitate the discharge of the cooling liquid in the liquid injection cavity 1.

[0034] A plurality of reinforcing ribs two are arranged between the inner wall of the lower forming mold base 3 and the outer wall of the convex mold group, and the reinforcing ribs two are designed to increase the strength of the lower forming mold base 3, so that the lower forming mold base 3 will not be deformed when the injection is pressurized.

[0035] The upper end of the movable mold 5 is provided with a feeding cavity 52, and the bottom end of the feeding cavity 52 is in communication with the upper forming mold base 9, and the feeding cavity 52 is provided with a feeding port 51 above, and the feeding port 51 is connected with the external injection pipe through a screw, so as to facilitate the injection of the molten material into the inner wall of the injection mold.

[0036] The fixed mold 1 is provided with four groups of guide blocks 11 which are uniformly distributed, each group of guide blocks 11 includes two symmetrically arranged guide blocks 11, and a side forming mold 12 is slidingly arranged between the two guide blocks 11 in the same group, and the side forming mold 12 is provided with an offset hole 13 which penetrates the side forming mold 12 from top to bottom.

[0037] The movable mold 5 is provided with four offset columns 53 which correspond to the side forming mold 12, and the offset column 53 and the offset hole 13 are both designed to be inclined, the side of the injection molded part is formed with a recessed notch, when the movable mold 5 and the fixed mold 1 are in contact, the offset column 53 is arranged in the offset hole 13, at this time, the side forming mold 12 is arranged on the side of the lower forming mold base 3 and is in contact with the side of the upper forming mold base 9, after injection, the side of the injection molded part is formed with a corresponding notch, and when the movable mold 5 moves upward and separates from the fixed mold 1, the offset column 53 will make the side forming mold 12 move outward synchronously, so as to facilitate the separation of the side forming mold 12 from the injection molded part and facilitate the removal of the lower mold.

[0038] The upper and lower sides of the lower forming die base 3 are provided with demolding holes one 32, and the upper and lower sides of the front and rear of the lower forming die base 3 are provided with demolding holes two 33, the demolding holes one 32 and the demolding holes two 33 extend downward and penetrate the fixed mold 1, the inside of the base 2 is provided with a lifting plate 8 which slides up and down, the lifting plate 8 is provided with demolding columns one 81 and demolding columns two 82, and the demolding columns one 81 and the demolding columns two 82 are respectively arranged in the demolding holes one 32 and the demolding holes two 33, the lifting plate 8 is connected with an external lifting device, when the movable mold 5 contacts the fixed mold 1, the top of the demolding columns one 81 and the demolding columns two 82 is flush with the outer side of the lower forming die base 3, and the two are designed to be sealed, after injection molding is completed, the movable mold 5 moves away from the fixed mold 1, the lifting plate 8 moves up under the action of the lifting device, the demolding columns one 81 and the demolding columns two 82 move up synchronously, and then the injection molded part moves upward and separates from the fixed mold 1, which facilitates the rapid demolding of the injection molded part.

[0039] The implementation principle of the rapid forming type injection mold in the embodiment of the application is as follows: during injection molding, the movable mold 5 is pressed on the upper side of the fixed mold 1, then high-temperature gas or hot liquid is added into the injection liquid cavity two 91 and the injection liquid cavity one 31 through the upper liquid inlet pipe 61 and the lower liquid inlet pipe 71, so that the lower forming die base 3 and the upper forming die group can be heated, and it is prevented that the injected material cools down to cause that the cavity is not fully filled, then the injection molding machine injects the material into the cavity between the lower forming die base 3 and the upper forming die base 9 through the feeding port 51 and the feeding cavity 52, and a certain pressure is maintained after the material is injected into the mold, so as to ensure that the material fully fills the corners and details;

[0040] After injection molding is completed, the inflow of the high-temperature gas or the hot liquid is cut off, and cooling liquid is introduced into the injection liquid cavity one 31 and the injection liquid cavity two 91 through the upper liquid inlet pipe 61 and the lower liquid inlet pipe 71, the flowing cooling liquid cools down the upper forming die base 9 and the lower forming die base 3, and then the inner and outer surfaces of the injection molded part can be cooled and solidified at the same time to maintain the shape of the part;

[0041] When the injection molded part is taken out, the movable mold 5 moves upward, then the lifting plate 8 moves up under the action of the lifting device, the demolding columns one 81 and the demolding columns two 82 move up synchronously, and then the injection molded part moves upward and separates from the fixed mold 1, which facilitates the rapid demolding of the injection molded part;

[0042] The upper forming die base 9 is arranged below the movable mold 5, the injection liquid cavity two 91 is formed between the upper forming die base 9 and the movable mold 5, the lower forming die base 3 is arranged above the fixed mold 1, the injection liquid cavity one 31 is formed between the lower forming die base 3 and the fixed mold 1, the injection liquid cavity one 31 and the injection liquid cavity two 91 can be filled with high-temperature gas or cooling liquid as needed, the high-temperature gas can heat the lower forming die base 3 and the upper forming die group, and it is prevented that the injected material cools down to cause that the cavity is not fully filled, and the cooling liquid can quickly cool and solidify the injection molded part, and the forming quality and efficiency are improved;

[0043] By setting a plurality of demolding columns one 81 and demolding columns two 82 in the lower forming die seat 3, the demolding columns one 81 and demolding columns two 82 can move the injection molded part upwards after the injection molded part is molded and solidified, so that the injection molded part is quickly demolded from the fixed mold 1, and the injection molding efficiency is improved.

[0044] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A rapid prototyping injection mold, comprising a base (2), characterized in that: A fixed mold (1) is installed above the base (2), and guide columns (4) are respectively provided at the four corners of the fixed mold (1). A movable mold (5) is provided on the upper end of the fixed mold (1) in a sliding manner, and the movable mold (5) is slidably sleeved with the guide columns (4) in an upward and downward manner. A protruding die base (14) is integrally formed at the middle of the upper end of the fixed die (1), a lower forming die base (3) is installed outside the protruding die base (14), and a gap is provided between the inner wall of the lower forming die base (3) and the outer wall of the protruding die base (14) to form a liquid injection cavity (31); A cavity matching the lower forming die base (3) is formed in a depression below the movable die (5), an upper forming die base (9) is installed in the cavity, and a second liquid injection cavity (91) is formed between the upper forming die base (9) and the cavity.

2. A rapid prototyping injection mold according to claim 1, characterized in that: An upper liquid discharge pipe (6) and an upper liquid inlet pipe (61) are respectively provided inside the front and rear sides of the outer portion of the movable mold (5), and the upper liquid discharge pipe (6) and the upper liquid inlet pipe (61) are both connected to the interior of the second liquid injection chamber (91). The rear end of the bottom of the interior of the second liquid injection chamber (91) is higher than the front side, and the height gradually decreases from the back to the front. A plurality of evenly distributed reinforcing ribs are also provided between the upper forming die base (9) and the die cavity.

3. A rapid prototyping injection mold according to claim 1, characterized in that: A lower liquid discharge pipe (7) and a lower liquid inlet pipe (71) are respectively provided inside the front and rear sides of the exterior of the fixed mold (1), and the lower liquid discharge pipe (7) and the lower liquid inlet pipe (71) are both connected to the interior of the first injection cavity (31). The rear end of the bottom of the interior of the first injection cavity (31) is higher than the front side, and the height gradually decreases from the back to the front. A plurality of evenly distributed reinforcing ribs are also provided between the inner wall of the lower forming die base (3) and the outer wall of the protruding die set.

4. A rapid prototyping injection mold according to claim 1, characterized in that: A feed cavity (52) is provided at the upper end of the movable mold (5), and the bottom end of the feed cavity (52) is connected to the upper molding mold base (9), and a feed port (51) is provided above the feed cavity (52).

5. The rapid prototyping injection mold according to claim 1, wherein: The fixed die (1) is provided with four groups of evenly distributed guide blocks (11), each group of guide blocks (11) includes two symmetrically arranged guide blocks (11), a side forming die (12) is slidably arranged between the two guide blocks (11) in the same group, and the side forming die (12) is penetrated by an offset hole (13) formed at the top and bottom; Four offset columns (53) corresponding to the side surfaces are provided below the movable mold (5), and the offset columns (53) and the offset holes (13) are both designed to be inclined.

6. A rapid prototyping injection mold according to claim 1, characterized in that: The left and right sides of the upper part of the lower forming mold base (3) are both provided with a demoulding hole 1 (32), and the front and rear sides of the upper part of the lower forming mold base (3) are both provided with a demoulding hole 2 (33). The demoulding hole 1 (32) and the demoulding hole 2 (33) both extend downward and penetrate the fixed mold (1). A lifting plate (8) is provided inside the base (2) to slide up and down. The demoulding column 1 (81) and the demoulding column 2 (82) are provided on the lifting plate (8), and the demoulding column 1 (81) and the demoulding column 2 (82) slide up and down and are placed in the demoulding hole 1 (32) and the demoulding hole 2 (33) respectively.

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