CN211542174U

CN211542174U - Injection mold

Info

Publication number: CN211542174U
Application number: CN201922351817.4U
Authority: CN
Inventors: 谭发长; 李峰; 李宁; 郑亮; 杨景威
Original assignee: Shanghai Yibo Material Application Technology Co ltd
Current assignee: Shanghai Yibo Material Application Technology Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-09-22
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to an injection moulding technical field discloses an injection mold, include: fixing a template; the movable template is attached to the lower surface of the fixed template and can move up and down relative to the fixed template, and an injection molding cavity is arranged on the movable template in the vertical direction; the movable insert comprises a matching part and a wedge part, the top part of the matching part is inserted into the injection molding cavity, and the movable insert can move up and down relative to the movable template; the first sliding block is provided with a first inclined surface, and the first inclined surface is matched with the inclined surface on one side of the wedge-shaped part; the second sliding block is provided with a second inclined surface, and the second inclined surface is matched with the inclined surface on the other side of the wedge-shaped part; and the driving component can drive the first sliding block and the second sliding block to move close to or away from each other. According to the injection mold, the supporting sheet is not required to be arranged at the bottom of the injection mold, the movable insert is moved up and down by using the driving assembly, the labor intensity can be reduced, and the production efficiency is improved. Automatic injection molding production is realized, and the service life is prolonged.

Description

Injection mold

Technical Field

The utility model relates to an injection moulding technical field especially relates to an injection mold.

Background

When a large-thickness plate workpiece is injection molded, the problems of serious sink marks, air holes and the like are easily caused due to the very large thickness of the workpiece and the process defects of the thermoplastic material. In order to solve the problem, continuous injection molding is adopted for multiple times in a layered mode, after the injection molding of the upper layer, cooling is carried out, after the cooling is carried out to a certain temperature, the injection molding of the lower layer is carried out.

As shown in fig. 1, the conventional injection mold includes a fixed mold plate 10, a movable mold plate 20, and a movable block 30, wherein the movable block 30 is disposed in the movable mold plate 20 in a matching manner, and the movable block 20 can slide in a vertical direction. The lower part of the movable block 30 is padded with a plurality of layers of supporting sheets 40, after each layer of injection molding, one layer of supporting sheet 40 is taken away, the movable block 30 can descend by a certain height to enlarge an injection molding cavity, and then the next layer of injection molding is carried out until the whole workpiece is subjected to injection molding.

However, the method has the disadvantages of high labor intensity, low production efficiency, large structural size of the die, more parts and unstable structure.

Therefore, an injection mold is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold, it can reduce intensity of labour and operational safety, improves production efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

provided is an injection mold including:

fixing a template;

the movable mould plate is attached to the lower surface of the fixed mould plate and can move up and down relative to the fixed mould plate, and an injection mould cavity is arranged on the movable mould plate;

the movable insert comprises a matching part and a wedge part, the top part of the matching part is inserted into the injection molding cavity, and the movable insert can move up and down relative to the movable template;

the first sliding block is provided with a first inclined surface, and the first inclined surface is matched with an inclined surface on one side of the wedge-shaped part;

the second sliding block is provided with a second inclined surface, and the second inclined surface is matched with the inclined surface on the other side of the wedge-shaped part;

and the driving component can drive the first sliding block and the second sliding block to move close to or away from each other.

Preferably, an elastic mechanism is arranged between the movable die plate and the movable insert, and the elastic mechanism can drive the movable insert to move downwards relative to the movable die plate.

Preferably, the elastic mechanism is disposed on both sides of the fitting portion.

Preferably, the bottom support assembly further comprises a bottom plate and two support blocks fixed on the bottom plate, the two support blocks are respectively located on two sides of the first sliding block, two sides of the first sliding block are respectively in sliding connection with the two support blocks, and two sides of the second sliding block are respectively in sliding connection with the two support blocks.

Preferably, the drive assembly includes driving motor, positive and negative lead screw, first lead screw nut and second lead screw nut, first lead screw nut set up in on the first sliding block, second lead screw nut set up in on the second sliding block, first lead screw nut revolve in the levogyration screw thread section of positive and negative lead screw, second lead screw nut revolve in the dextrorotation screw thread section of positive and negative lead screw, driving motor can drive positive and negative lead screw rotates, so that first sliding block with the second sliding block draws close each other or keeps away from.

Preferably, the area of the fixed die plate close to the injection molding cavity is provided with a plurality of first cooling hole groups, and the movable die plate is provided with a plurality of second cooling hole groups around the injection molding cavity.

Preferably, the fixed die plate is provided with a nozzle.

Preferably, the first inclined surface is provided with a first continuous step, the second inclined surface is provided with a second continuous step, one inclined surface of the wedge-shaped portion is provided with a third continuous step matched with the first continuous step, and the other inclined surface is provided with a fourth continuous step matched with the second continuous step.

Preferably, the included angle between the two faces of the first continuous step is a right angle or an obtuse angle, and the included angle between the two faces of the second continuous step is a right angle or an obtuse angle.

Preferably, the two sides of the fixed die plate are vertically provided with limit blocks, the limit blocks are provided with limit grooves, and the two ends of the movable insert block are both provided with limit bolts connected with the limit blocks.

The utility model has the advantages that:

the two inclined surfaces of the wedge-shaped part of the movable insert can be respectively matched with the first sliding block and the second sliding block so as to lock the movable insert relative to the movable template, and when the movable insert is used for injection molding, the driving assembly is in a relatively static state and is not influenced by injection molding pressure.

This injection mold need not to set up the backing sheet in injection mold's bottom, uses drive assembly to drive, can reduce intensity of labour, improves production efficiency. The automatic injection molding production is realized, the structure of the injection mold is more stable, and the service life is prolonged. And a plurality of layers of supporting sheets are not required to be arranged, so that the overall structure size of the injection mold is reduced, parts of the injection mold are reduced, and the production cost is reduced.

Drawings

FIG. 1 is a schematic view of a prior art injection mold;

FIG. 2 is a schematic structural view of an injection mold provided by the present invention;

fig. 3 is a schematic partial structural diagram of an injection mold according to the present invention;

fig. 4 is a schematic view of a partial structure of an injection mold according to the present invention;

fig. 5 is a schematic view of a partial structure of an injection mold according to the present invention;

fig. 6 is a sectional view of the injection mold provided by the present invention;

FIG. 7 is an enlarged partial view taken at A in FIG. 6;

fig. 8 is a schematic structural diagram of the wedge-shaped portion and the first sliding block in cooperation (two faces of the first continuous step form an obtuse angle).

In the figure: 10. fixing a template; 20. moving the template; 30. a movable block; 40. a support sheet;

100. a workpiece;

1. fixing a template; 11. a first set of cooling holes; 12. shooting mouth; 13. a guide strip; 131. a guide groove; 14. a guide sleeve;

2. moving the template; 21. a second set of cooling holes; 22. a guide bar;

3. a movable insert; 31. a fitting portion; 32. a wedge portion;

41. a first slider; 411. a guide block; 42. a second slider;

5. a drive assembly; 51. a drive motor; 52. a positive lead screw and a negative lead screw;

61. a spring; 62. a connecting rod;

71. a base plate; 72. a support block; 721. a guide sleeve; 73. a limiting rod; 74. a connecting plate; 75. and (6) a guide pillar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 2 to 6, the present embodiment discloses an injection mold, which includes a fixed mold plate 1, a movable mold plate 2, a movable insert 3, a first slide block 41, a second slide block 42, and a driving assembly 5.

The movable template 2 is attached to the lower surface of the fixed template 1, the fixed template 1 and the movable template 2 are opened to form a parting surface, and the parting surface is the top surface of the movable template 2 and the bottom surface of the fixed template. And the movable mould plate 2 can move up and down relative to the fixed mould plate 1, and an injection mould cavity is arranged on the movable mould plate 2 in the vertical direction. The movable insert 3 comprises a matching part 31 and a wedge part 32, the top part of the matching part 31 is inserted into the injection molding cavity, and the movable insert 3 can move up and down relative to the movable die plate 2. The first slide block 41 is provided with a first inclined surface that cooperates with an inclined surface on one side of the wedge 32. The second slide block 42 is provided with a second inclined surface which cooperates with the inclined surface of the other side of the wedge 32. The driving assembly 5 can drive the first slide block 41 and the second slide block 42 to move toward or away from each other.

Specifically, the length of the wedge 32 is greater than the width of the mating portion 31, facilitating the arrangement of two inclined surfaces on the wedge 32. An elastic mechanism is arranged between the movable die plate 2 and the movable insert 3, and the elastic mechanism can drive the movable insert 3 to move downwards relative to the movable die plate 2. Both sides of the fitting portion 31 are provided with elastic mechanisms. Specifically, the elastic mechanism includes a connecting rod 62 and a spring 61 sleeved on the connecting rod 62, blind step holes are respectively formed in the upper surface of the wedge-shaped portion 32 and the lower surface of the movable die plate 2, the connecting rod 62 is inserted into a small-bore section of the blind step hole, and two ends of the spring 61 are abutted against the step surface of the blind step hole. The connecting rod 62 can slide up and down in the blind stepped hole of the movable die plate 2, so that the connecting rod 62 can follow the movable insert 3 to move. All the interval is provided with two elastic mechanism in every side of cooperation portion 31, and four elastic mechanism are the rectangle and arrange, make movable mould board 2 and wedge portion 32 atress more even, avoid cooperation portion 31 to incline in the injection molding die cavity. In other embodiments, the elastic mechanism may also be an air cylinder or an oil cylinder (if the elastic mechanism may also be an air cylinder or an oil cylinder, the limit rod 73 may not be provided). Limiting rods 73 are further arranged at two ends of the movable template 2, one ends of the limiting rods 73 are exposed out of the bottom surface of the movable template 2, the exposed parts are arranged in sliding sleeves in sliding holes of the wedge-shaped parts 32 in a sliding mode, and the movable insert 3 can be limited in the process that the movable insert 3 moves up and down relative to the movable template 2.

Optionally, the injection mold further includes a bottom support assembly, which includes a bottom plate 71 and two support blocks 72 fixed on the bottom plate 71, the two support blocks 72 are respectively located at two sides of the first sliding block 41, two sides of the first sliding block 41 are respectively connected with the two support blocks 72 in a sliding manner, and two sides of the second sliding block 42 are respectively connected with the two support blocks 72 in a sliding manner. Specifically, a guide groove is provided on the inner side of the supporting block 72, and guide blocks 411 matched with the guide groove are provided on both sides of the first sliding block 41 and the second sliding block 42, or a guide rail is provided on the inner side of the supporting block 72, and a guide groove matched with the guide rail is provided on both sides of the first sliding block 41 and the second sliding block 42.

The top surfaces of the two support blocks 72 are fixedly connected by a connecting plate 74, and two ends of the support blocks 72 are respectively provided with a connecting plate 74.

The movable template 2 is arranged on the supporting block 72, the guide rod 22 is arranged on the movable template 2, the guide groove 131 is arranged on the supporting block 72, the guide sleeve 721 is arranged in the guide groove 131, and the guide rod 22 is exposed out of the lower surface of the movable template 2 and the exposed part is inserted in the guide sleeve 721. Four guide rods 22 are arranged on the movable mould plate 2, and guide sleeves 721 matched with the guide rods 22 are arranged at two ends of the supporting block 72. The movable die plate 2 is movable up and down along the guide bar 22 with respect to the support block 72.

The movable mould plate 2 is provided with a guide post 75, the fixed mould plate 1 is provided with a guide post hole, and the guide sleeve 14 is arranged in the guide post hole. The part of the guide post 75 exposed out of the movable die plate 2 after passing through the movable die plate 2 upwards is inserted into the guide sleeve 14, and the fixed die plate 1 can move up and down relative to the movable die plate 2 along the guide post 75 so as to carry out die assembly and die disassembly.

In this embodiment, the driving assembly 5 includes a driving motor 51, a positive and negative lead screw 52, a first lead screw nut and a second lead screw nut, the first lead screw nut is disposed on the first sliding block 41, the second lead screw nut is disposed on the second sliding block 42, the first lead screw nut is screwed on the left-hand thread section of the positive and negative lead screw 52, the second lead screw nut is screwed on the right-hand thread section of the positive and negative lead screw 52, the driving motor 51 can drive the positive and negative lead screw 52 to rotate, so that the first sliding block 41 and the second sliding block 42 are close to or away from each other.

In other embodiments, the driving assembly 5 includes two cylinders (or oil cylinders), and the first sliding block 41 and the second sliding block 42 are respectively disposed at the output ends of the two cylinders (or oil cylinders). Alternatively, the driving assembly 5 may be a rack and pinion mechanism or a gear motor mechanism.

The fixed die plate comprises a fixed die plate 1 and is characterized in that limiting blocks 13 are vertically arranged on two sides of the fixed die plate 1, limiting grooves 131 are formed in the limiting blocks 13, and limiting bolts connected with the limiting blocks 131 are arranged at two ends of the movable insert 3.

The fixed die plate 1 is provided with a nozzle 12, and the injection cavity can be filled with molten plastic through the nozzle 12 (the nozzle adopts a valve needle type hot runner injection mode) to perform injection molding on the workpiece 100.

The area of the fixed die plate 1 close to the injection molding cavity is provided with a plurality of first cooling hole groups 11, and the first cooling hole groups 11 comprise cooling liquid inlet holes and cooling liquid outlet holes which are communicated with each other.

The movable mould plate 2 is provided with a plurality of second cooling hole groups 21 around the injection mould cavity, and the second cooling hole groups 21 comprise cooling liquid inlet holes and cooling liquid outlet holes which are mutually communicated. The first cooling hole group 11 and the second cooling hole group 21 are both filled with cooling liquid, and the cooling liquid can radiate the fixed template 1 and the movable template 2, so that the injection-molded workpiece 100 can be rapidly cooled and cooled, and the injection molding speed is increased.

The first inclined plane is provided with a first continuous step, the second inclined plane is provided with a second continuous step, and two inclined planes of the wedge-shaped part 32, wherein one inclined plane is provided with a third continuous step matched with the first continuous step, and the other inclined plane is provided with a fourth continuous step matched with the second continuous step.

In this embodiment, as shown in fig. 7, the included angle between the two surfaces of the first continuous step is an obtuse angle, the upper surface of the first continuous step is arranged along the horizontal direction, the side surface is arranged in an outward inclined manner, and the height of the first continuous step is h. In this embodiment, two included angles of the second continuous step are also obtuse angles, the upper surface of the second continuous step is arranged along the horizontal direction, the side surface is arranged in an outward inclined manner, and the height of the second continuous step is h, 0.5h, 0.25h or 0.125 h. The third continuous step is matched with the first continuous step, and the fourth continuous step is matched with the second continuous step. In other embodiments, the included angle between two faces of the second continuous step may be a right angle or an obtuse angle.

In other embodiments, an included angle between two surfaces of the first continuous step is a right angle, an upper surface of the first continuous step is arranged along a horizontal direction, a side surface of the first continuous step is arranged along a vertical direction, and a height of the first continuous step is h. In this embodiment, two included angles of the second continuous step are also right angles, the upper surface of the second continuous step is arranged along the horizontal direction, the side surface is arranged along the vertical direction, and the height of the second continuous step is h, 0.5h, 0.25h or 0.125 h. The third continuous step is matched with the first continuous step, and the fourth continuous step is matched with the second continuous step. In other embodiments, the included angle between two faces of the second continuous step may be a right angle or an obtuse angle. In the injection molding process, the first sliding block 41 and the second sliding block 42 are both vertically and downwardly forced by the movable insert 3, and the first sliding block 41 and the second sliding block 42 are matched to lock the movable insert 3.

Alternatively, as shown in fig. 8, the included angle between the two surfaces of the first continuous step is an obtuse angle, the upper surface of the first continuous step is inclined downward and outward, the side surface is inclined outward, and the height of the first continuous step is h. In this embodiment, two included angles of the second continuous step are also obtuse angles, the upper surface of the second continuous step is inclined downward and outward, the side surface is inclined outward, and the height of the second continuous step is h, 0.5h, 0.25h or 0.125 h. The third continuous step is matched with the first continuous step, and the fourth continuous step is matched with the second continuous step. In other embodiments, the included angle between two faces of the second continuous step may be a right angle or an obtuse angle.

After the injection molding, the driving assembly 5 drives the first slide block 41 and the second slide block 42 to move away from each other to unlock the movable die plate 2, the movable insert 3 moves downward by a preset distance H (H is an integral multiple of H), and the first slide block 41 and the second slide block 42 continue to lock the movable insert 3. After the movable insert 3 descends, the injection molding cavity is expanded, and the next injection molding is performed.

When the number of injection molding times reaches a limited number N, the total thickness D of the workpiece 100 is equal to N × H. The fixed die plate 1 is opened, and then the movable insert 3 moves upwards to eject the workpiece 100.

The two inclined surfaces of the wedge-shaped portion 32 of the movable insert 3 can cooperate with the first slide block 41 and the second slide block 42, respectively, to lock the movable insert 3 with respect to the movable platen 2, and during injection, the driving assembly 5 is in a relatively stationary state and is not affected by the injection pressure.

According to the injection mold, a support sheet is not required to be arranged at the bottom of the injection mold, and the driving assembly 5 is used for driving, so that the labor intensity can be reduced, and the production efficiency can be improved; and the operation is safe and reliable. The automatic injection molding production is realized, the structure of the injection mold is more stable, and the service life is prolonged. And a plurality of layers of supporting sheets are not required to be arranged, so that the overall structure size of the injection mold is reduced, parts of the injection mold are reduced, and the production cost is reduced.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An injection mold, comprising:

a fixed template (1);

the movable mould plate (2) is attached to the lower surface of the fixed mould plate (1) and can move up and down relative to the fixed mould plate (1), and an injection mould cavity is arranged on the movable mould plate (2);

the movable insert (3) comprises a matching part (31) and a wedge-shaped part (32), the top part of the matching part (31) is inserted into the injection molding cavity, and the movable insert (3) can move up and down relative to the movable template (2);

a first sliding block (41) provided with a first inclined surface that is fitted with an inclined surface on one side of the wedge portion (32);

a second sliding block (42) provided with a second inclined surface that cooperates with the inclined surface of the other side of the wedge portion (32);

a drive assembly (5) capable of driving the first slider (41) and the second slider (42) toward and away from each other.

2. An injection mould according to claim 1, characterized in that elastic means are provided between the moving platen (2) and the movable insert (3), said elastic means being capable of driving the movable insert (3) downwards with respect to the moving platen (2).

3. An injection mould according to claim 2, characterized in that both sides of the fitting part (31) are provided with the resilient means.

4. An injection mold according to claim 1, further comprising a bottom support assembly comprising a bottom plate (71) and two support blocks (72) fixed on said bottom plate (71), wherein said two support blocks (72) are respectively located at two sides of said first sliding block (41), said two sides of said first sliding block (41) are respectively connected with said two support blocks (72) in a sliding manner, and said two sides of said second sliding block (42) are respectively connected with said two support blocks (72) in a sliding manner.

5. The injection mold according to claim 1, wherein the driving assembly (5) comprises a driving motor (51), a positive and negative lead screw (52), a first lead screw nut and a second lead screw nut, the first lead screw nut is arranged on the first sliding block (41), the second lead screw nut is arranged on the second sliding block (42), the first lead screw nut is screwed on a left-handed thread section of the positive and negative lead screw (52), the second lead screw nut is screwed on a right-handed thread section of the positive and negative lead screw (52), and the driving motor (51) can drive the positive and negative lead screw (52) to rotate so as to enable the first sliding block (41) and the second sliding block (42) to be close to or far away from each other.

6. An injection mould according to claim 1, characterized in that the area of the stationary mould plate (1) close to the injection mould cavity is provided with a number of first cooling hole groups (11), and the moving mould plate (2) is provided with a number of second cooling hole groups (21) around the injection mould cavity.

7. An injection mould according to claim 1, characterized in that the stationary mould plate (1) is provided with a nozzle (12).

8. An injection mould according to claim 1, characterized in that the first inclined surface is provided with a first continuous step and the second inclined surface is provided with a second continuous step, one inclined surface of the wedge-shaped portion (32) is provided with a third continuous step cooperating with the first continuous step and the other inclined surface is provided with a fourth continuous step cooperating with the second continuous step.

9. An injection mould according to claim 8, wherein the included angle between the two faces of the first continuous step is a right angle or an obtuse angle, and the included angle between the two faces of the second continuous step is a right angle or an obtuse angle.

10. The injection mold according to claim 1, wherein two sides of the fixed mold plate (1) are vertically provided with a limiting block (13), the limiting block (13) is provided with a limiting groove (131), and two ends of the movable insert (3) are provided with limiting bolts connected with the limiting block (13).