CN112829201A

CN112829201A - Automatic opening and closing die

Info

Publication number: CN112829201A
Application number: CN202011437499.4A
Authority: CN
Inventors: 戴胜; 刘伟元
Original assignee: Tianjin Credit Technology Co ltd
Current assignee: Tianjin Credit Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-05-25

Abstract

The invention discloses an automatic opening and closing mold, which relates to the technical field of injection molds and comprises a front mold and a rear mold; a plurality of transmission rods which are vertical to the mold closing surface are uniformly distributed on the periphery of the cavity of the front mold, the transmission rods are rotatably arranged on the front mold, a threaded section with external threads on the surface is formed on one side, away from the front mold, of each transmission rod, and a plurality of threaded holes which are in one-to-one correspondence with the transmission rods are formed in the rear mold; a driving assembly is arranged on the outer side of the front die and is in transmission connection with one end, far away from the threaded section, of each transmission rod; the driving component drives each transmission rod to synchronously rotate forwards or reversely. The automatic opening and closing die provided by the invention has the advantages of stable work, convenience in use, capability of avoiding product rejection rate and capability of reducing production cost.

Description

Automatic opening and closing die

Technical Field

The invention relates to the technical field of injection molds, in particular to an automatic opening and closing mold.

Background

Injection molding is a method for producing and molding industrial products. The products are generally produced by rubber injection molding and plastic injection molding. An injection molding machine (an injection machine or an injection molding machine for short) is a main molding device for making thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding die, and the injection molding is realized by the injection molding machine and the die.

At present, most injection molding machines adopt an oil cylinder or an air cylinder to complete mold opening and closing; by adopting the mode, the speed of the front die and the rear die (or the upper die and the lower die) of the die is not controlled well when the die is opened, and if the speed of the die is not stable enough, the surface of a product is torn possibly due to impact when the die is opened, so that the product is scrapped.

Disclosure of Invention

The invention aims to provide an automatic opening and closing die, which utilizes a driving assembly to drive each transmission rod to synchronously rotate forwards or reversely, avoids product scrap and reduces production cost.

The technical purpose of the invention is realized by the following technical scheme:

an automatic opening and closing mold comprises a front mold and a rear mold; the front die is uniformly provided with a plurality of transmission rods which are perpendicular to the die closing surface and are arranged on the peripheral side of the die cavity, the transmission rods are rotatably arranged on the front die, a threaded section with external threads on the surface is formed on one side, away from the front die, of each transmission rod, and the rear die is provided with a plurality of threaded holes which are in one-to-one correspondence with the transmission rods; the front die is provided with a driving assembly, and the driving assembly is in transmission connection with one end of each transmission rod, which is far away from the thread section; the driving assembly drives the transmission rods to synchronously rotate forwards or reversely.

By adopting the technical scheme, in work, the driving assembly can drive each transmission rod to synchronously rotate forwards or reversely; after the transmission rods start to rotate, the transmission rods are in threaded connection with the threaded holes in the rear die, and after the transmission rods start to synchronously rotate, the transmission rods can synchronously stretch in the corresponding threaded holes, so that the front die and the rear die can be automatically opened and closed. Through the mode, the risk that the product is severely impacted when the mould is opened is reduced, the surface of the product is prevented from being torn, the rejection rate of the product is reduced, and the production cost is reduced.

The invention is further configured to: an inner cavity is formed in the front die, and one end of the transmission rod, which is far away from the threaded section, extends into the inner cavity to form a transmission end; the driving assembly comprises a plurality of driven chain wheels which are coaxially fixed at the transmission ends of the transmission rods respectively, a combined chain wheel which is rotatably arranged on the inner wall of the inner cavity and a driving motor which is fixedly arranged on the outer side wall of the front mold, a power input chain wheel is coaxially fixed on an output shaft of the driving motor, and the power input chain wheel and the driven chain wheels are in transmission connection with the combined chain wheel through chains.

The invention is further configured to: the front die comprises a section die used for matching with a rear die forming cavity and an end cover detachably fixed on one side of the section die, which is far away from the cavity; the inner cavity is formed between the end cover and the forming die.

The invention is further configured to: the outer side wall of the front die is fixedly provided with a mounting frame, and the mounting frame is provided with a mounting plate for mounting a driving motor in an adjustable lifting mode.

The invention is further configured to: the front mould is also convexly provided with an annular bulge at the peripheral side of the cavity; and the rear die is correspondingly provided with an annular groove which is used for being embedded and matched with the annular bulge.

The invention is further configured to: and the limiting baffle is fixedly arranged on the two opposite side walls of the front mold or the rear mold, and is simultaneously attached to the side wall of one side, corresponding to the front mold and the rear mold.

The invention is further configured to: a clamping block is convexly formed on the side wall of the front mold; and a fastening component used for being in fastening fit with the fixture block is arranged on the corresponding side wall of the rear mold.

Through adopting above-mentioned technical scheme, after the compound die is accomplished, the fixture block can with the lock joint subassembly lock joint to guarantee the stability of mould compound die.

The invention is further configured to: the fastening component comprises a fastening strip, one end of the fastening strip is hinged with the rear mold, one end of the fastening strip, which is far away from the hinged point of the fastening strip and the rear mold, is of an arc-shaped structure and is lapped on the fixture block, and a clamping groove for fastening and matching with the fixture block is formed in the fastening strip; and the corresponding side wall of the rear mould is also provided with an elastic connecting piece, two ends of the elastic connecting piece are fixedly connected with the rear mould and the fastening strip respectively, and the elastic connecting piece pushes the fastening strip to abut against the clamping block.

By adopting the technical scheme, taking the die closing process as an example, when the front die gradually moves towards the rear die, the clamping block pushes the fastening strip to turn around the hinged point of the fastening strip and the rear die; in the process, the elastic connecting piece always pushes the buckling strip to tightly abut against the clamping block; when the clamping block moves to the position of the clamping groove on the fastening strip, the clamping block is embedded into the clamping groove and is in fastening fit with the clamping groove; at the moment, the worker knows that the die assembly reaches the designated position, and the worker can conveniently judge whether the die assembly is sufficient. Meanwhile, when the injection molding is carried out actually, the clamping block and the clamping groove are always in fastening connection, and the working stability of the mold can be fully ensured.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) the driving assembly is used for driving each transmission rod to rotate forwards or reversely synchronously so as to push the front mold to be close to or far away from the rear mold, so that the mold is opened and closed stably, the risk of severe impact on a product during mold opening is reduced, the surface of the product is prevented from being torn, the rejection rate of the product is reduced, and the production cost is reduced;

(2) with the help of the cooperation use of fixture block and lock joint subassembly, make things convenient for the staff to judge whether the compound die is abundant, improve the convenience of operation to fully guarantee the stability of mould work.

Drawings

FIG. 1 is an axial schematic view of the overall structure of one embodiment of the present invention;

FIG. 2 is a schematic sectional view of an overall structure of an embodiment of the present invention, which is mainly used for embodying the internal structure of a mold;

fig. 3 is a partially enlarged view of a portion a in fig. 1, which is mainly used for embodying the latch and the fastening assembly.

Reference numerals: 1. a front mold; 101. forming a mould; 102. an end cap; 2. a rear mold; 21. an annular groove; 3. a cavity; 4. an injection port; 5. an inner cavity; 6. a transmission rod; 61. a threaded segment; 7. a driven sprocket; 8. a combination sprocket; 81. a chain distributing wheel; 82. a transfer sprocket; 9. fixing the screw rod; 10. mounting a plate; 11. a drive motor; 12. a power input sprocket; 13. an annular projection; 14. a limit baffle; 15. a clamping block; 16. a fastening strip; 161. a card slot; 17. compressing the spring.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying examples.

Referring to the attached drawings 1-2, the automatic opening and closing mold comprises a front mold 1 and a rear mold 2, a cavity 3 is defined between the front mold 1 and the rear mold 2, and a plurality of injection ports 4 communicated with the cavity 3 are formed in the rear mold 2 and used for injecting raw materials. The front die 1 comprises a section die 101 which is used for matching with the rear die 2 to form a cavity 3, an end cover 102 is detachably fixed on one side of the section die 101, which is far away from the rear die 2, through bolts, and an inner cavity 5 is formed between the section die 101 and the end cover 102.

Referring to the attached figure 2, a plurality of transmission rods 6 which are arranged perpendicular to the mold closing surface are uniformly distributed on the periphery of the cavity 3 of the front mold 1; in this embodiment, four driving rods 6 may be provided, and each driving rod 6 may be respectively provided near four corners of the front mold 1. Taking any one of the transmission rods 6 as an example, the transmission rod 6 can be made of high-strength alloy, and two ends of the transmission rod are respectively arranged in the front die 1 and the rear die 2 in a penetrating manner; wherein, the transmission rod 6 is used for forming external threads on the partial surface of the penetrating rear die 2 to form a thread section 61, and the rear die 2 is correspondingly provided with a thread hole matched with the thread. One end of the transmission rod 6, which is far away from the upper threaded section 61 of the transmission rod, penetrates through the mould 101 and extends into the inner cavity 5; the part of the transmission rod 6 penetrating the mould 101 can be rotatably connected with the mould 101 through a shaft sleeve, and the end part of the transmission rod extending into the inner cavity 5 forms a transmission end.

Referring to the attached drawings 1-2, a driving assembly for driving each transmission rod 6 to synchronously rotate is arranged on the front die 1, and the driving assembly comprises four driven chain wheels 7 with the same specification and coaxially fixed at the transmission end of each transmission rod 6 respectively and a combined chain wheel 8 rotationally arranged on the inner wall of the inner cavity 5; wherein, combination sprocket 8 includes that 5 are the branch sprocket 81 of coaxial fixed setting, and wherein four divide the sprocket 81 specifications the same and correspond each driven sprocket 7 respectively, and last sprocket constitutes transfer sprocket 82.

Meanwhile, the top wall of the front mould 1 is also provided with an installation frame, the installation frame comprises at least four fixing screw rods 9 vertically fixed on the front mould 1, and each fixing screw rod 9 simultaneously penetrates through an installation plate 10; in order to fix the mounting plate 10, two nuts are connected to the fixing screw 9 by screw threads, and the two nuts respectively abut against the upper and lower surfaces of the mounting plate 10. When the installation is completed, the mounting plate 10 is horizontally arranged, and the height can be flexibly adjusted along with each nut.

The driving assembly also comprises a driving motor 11 fixedly arranged on the mounting plate 10, and a power input chain wheel 12 is coaxially fixed on an output shaft of the driving motor 11; the power input sprocket 12 is drivingly connected to the intermediate sprocket 82 via a chain, and each driven sprocket 7 is drivingly connected to the corresponding sub-sprocket 81 via a chain. In operation, driving motor 11 accessible power input sprocket 12 and chain drive transfer sprocket 82 rotatory, and transfer sprocket 82 and then drive each driven sprocket 7 rotation through other each minute sprocket 81, and each driven sprocket 7 and then drive each transfer line 6 synchronous revolution. The positive and negative rotation of each transmission rod 6 can be controlled by the positive and negative rotation of the driving motor 11, and the positive and negative rotation of the transmission rod 6 can respectively correspond to the mold closing and mold opening processes of the front mold 1.

As shown in fig. 2, in order to ensure the stability of mold closing, an annular protrusion 13 is further formed on one side of the mold 101 close to the rear mold 2 in a protruding manner, and the cross section of the annular protrusion 13 can be set to be an isosceles trapezoid structure; correspondingly, the back die 2 is concavely formed with an annular groove 21 on the die assembly surface, and the shape of the annular groove 21 is matched with that of the annular bulge 13; after the mold closing is completed, the annular protrusion 13 is just inserted into the annular groove 21. Meanwhile, a pair of limiting baffles 14 are arranged on two opposite sides of the rear mold 2, the limiting baffles 14 are detachably fixed with the rear mold 2 through bolts, and the limiting baffles 14 are simultaneously attached to the side walls of the front mold 1 and the side walls of the rear mold 2 corresponding to the front mold 1 and the rear mold 2; in the mould opening and closing process, the limiting baffle 14 can limit and guide the front mould 1, and is favorable for improving the stability of the mould opening and closing.

In another embodiment, the limiting baffles 14 may be arranged in a group around the rear mold 2, and the effect achieved by the limiting baffles is similar to that achieved by the limiting baffles, which is not described herein again.

Referring to fig. 1 and fig. 3, in order to further improve the stability of the opening and closing mold, two opposite side walls of the mold 101 are provided with the locking blocks 15, and two corresponding side walls of the rear mold 2 are provided with the fastening components for fastening and matching with the locking blocks 15. Taking any one of the side walls as an example, the fastening component comprises a fastening strip 16 with one end hinged on the rear mold 2, and one end of the fastening strip 16 far away from the hinged point with the rear mold 2 is of an arc structure and is lapped on the fixture block 15; the clamping block 15 is located on one side of the arc-shaped section of the fastening strip 16 departing from the curvature center thereof. The corresponding side wall of the rear mould 2 is also provided with an elastic connecting piece which can adopt a compression spring 17, and two ends of the compression spring 17 are respectively fixedly connected with the rear mould 2 and the buckling strip 16; in operation, compression spring 17 will always urge fastening strip 16 against latch 15. Meanwhile, a clamping groove 161 is formed on the fastening strip 16; in the process of die assembly, as the front die 1 gradually approaches the rear die 2, the fixture block 15 gradually pushes the buckling strip 16 to turn towards one side of the compression spring 17; when the latch 15 moves along the fastening strip 16 to the latch slot 161, the latch 15 will be inserted into the latch slot 161 and be fastened and engaged therewith.

In another embodiment, the fastening blocks 15 and the fastening components may be disposed in a group around the mold; meanwhile, the elastic connecting piece can also be an extension spring; at this time, only the bending direction of the arc-shaped section on the fastening strip 16 needs to be changed, and the principle is essentially consistent, which is not described herein.

The working principle of the embodiment is as follows: in work, the driving component can drive each transmission rod 6 to rotate forwards or backwards synchronously; after the transmission rods 6 start to rotate, due to the fact that the transmission rods 6 are in threaded connection with the threaded holes in the rear die 2, after the transmission rods 6 start to rotate synchronously, the transmission rods 6 stretch out and draw back synchronously in the corresponding threaded holes, and therefore automatic opening and closing of the front die 1 and the rear die 2 are achieved. Through the mode, the risk that the product is severely impacted when the mould is opened is reduced, the surface of the product is prevented from being torn, the rejection rate of the product is reduced, and the production cost is reduced.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides an automatic mould that opens and shuts which characterized in that: comprises a front mould (1) and a rear mould (2); a plurality of transmission rods (6) which are perpendicular to the mold closing surface are uniformly distributed on the periphery of the cavity (3) of the front mold (1), the transmission rods (6) are rotatably arranged on the front mold (1), a threaded section (61) with external threads on the surface is formed on one side, away from the front mold (1), of each transmission rod (6), and a plurality of threaded holes which are in one-to-one correspondence with the transmission rods (6) are formed in the rear mold (2); the front die (1) is provided with a driving assembly, and the driving assembly is in transmission connection with one end, far away from the threaded section (61), of each transmission rod (6); the driving component drives each transmission rod (6) to synchronously rotate forwards or reversely.

2. An automatic opening and closing mold according to claim 1, characterized in that: an inner cavity (5) is formed in the front die (1), and one end, far away from the threaded section (61), of the transmission rod (6) extends into the inner cavity (5) to form a transmission end; the driving assembly comprises a plurality of driven chain wheels (7) which are respectively and coaxially fixed at the transmission end of each transmission rod (6), a combined chain wheel (8) which is rotatably arranged on the inner wall of the inner cavity (5) and a driving motor (11) which is fixedly arranged on the outer side wall of the front mold (1), wherein a power input chain wheel (12) is coaxially fixed on a motor output shaft of the driving motor (11), and the power input chain wheel (12) and each driven chain wheel (7) are in transmission connection with the combined chain wheel (8) through chains.

3. An automatic opening and closing mold according to claim 2, characterized in that: the front die (1) comprises a forming die (101) used for being matched with the forming cavity (3) of the rear die (2) and an end cover (102) detachably fixed on one side, away from the forming cavity (3), of the forming die (101); the inner cavity (5) is formed between the end cover (102) and the forming die (101).

4. An automatic opening and closing mold according to claim 2, characterized in that: the outer side wall of the front die (1) is fixedly provided with a mounting frame, and a mounting plate (10) used for mounting a driving motor (11) is arranged on the mounting frame in a lifting adjustable mode.

5. An automatic opening and closing mold according to claim 1, characterized in that: an annular bulge (13) is formed on the periphery of the cavity (3) of the front die (1) in a bulging mode; and an annular groove (21) which is used for being embedded and matched with the annular bulge (13) is correspondingly formed on the rear die (2).

6. An automatic opening and closing mold according to claim 1, characterized in that: the front mold (1) or the rear mold (2) is fixedly provided with a limiting baffle (14) on two opposite side walls, and the limiting baffle (14) is attached to the side wall of one side, corresponding to the front mold (1) and the rear mold (2), of the rear mold.

7. An automatic opening and closing mold according to claim 1, characterized in that: a clamping block (15) is formed on the side wall of the front die (1) in a protruding mode; and a fastening component used for being in fastening fit with the clamping block (15) is arranged on the corresponding side wall of the rear die (2).

8. An automatic opening and closing mold according to claim 7, characterized in that: the fastening assembly comprises a fastening strip (16) with one end hinged with the rear mold (2), one end of the fastening strip (16) far away from the hinged point of the fastening strip and the rear mold (2) is of an arc-shaped structure and is lapped on the clamping block (15), and a clamping groove (161) used for being fastened and matched with the clamping block (15) is formed in the fastening strip (16); the rear die (2) is further provided with an elastic connecting piece on the corresponding side wall, two ends of the elastic connecting piece are fixedly connected with the rear die (2) and the fastening strip (16) respectively, and the elastic connecting piece pushes the fastening strip (16) to abut against the clamping block (15).