CN112829183A

CN112829183A - Plastic mold forming device and method for embedding nut

Info

Publication number: CN112829183A
Application number: CN202110008232.1A
Authority: CN
Inventors: 张志军
Original assignee: Changsha Jizhimei Technology Co ltd
Current assignee: Changsha Jizhimei Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-05-25
Anticipated expiration: 2041-01-05
Also published as: CN112829183B

Abstract

The invention discloses a plastic mold forming device and a method for embedding a nut, which comprises a base and a top plate arranged above the base, wherein support plates connected with two ends of the base are symmetrically arranged on two sides of the lower end of the top plate, a lower module is arranged at the upper end of the base, an upper module is arranged above the lower module, an injection molding cavity for injection molding is arranged between the lower module and the upper module, cooling cavities for cooling are arranged inside the upper module and the lower module, the middle position of the upper end of the upper module is connected with the lower end of a traction rod, the upper end of the traction rod is connected with the output end of a lifting cylinder, and the lifting cylinder is fixed on the top plate through a bolt. Avoid the too big problem that leads to the mould to warp of the difference in temperature, the practicality is strong.

Description

Plastic mold forming device and method for embedding nut

Technical Field

The invention relates to the technical field of injection molding, in particular to a device and a method for molding a plastic mold with embedded nuts.

Background

At present, due to the characteristics of the structure of some injection products, nuts need to be embedded into the products, the nuts are embedded into an injection mold in an injection molding mode, and the accurate and rapid implantation of the nuts into the mold is a great problem faced by people all the time. At present, the nut implanting operation is generally carried out manually or by a manipulator in the industry, and the manual nut implanting mode has low efficiency and unstable quality due to high mold opening temperature and certain danger; the mode of implanting by the manipulator increases the development cost of the equipment, and the manipulator is difficult to implant between the upper die and the lower die due to the small die opening distance of some dies.

To above-mentioned problem, current patent publication No. is CN 111037845A's patent has announced a nut embedding injection mold, and the device imbeds the nut after the mould shaping, and this kind of embedding mode is somehow can destroy the original structure of mould, is unfavorable for improving the processingquality of mould.

In view of the problems of the prior art, a device and a method for forming a plastic mold for embedding a nut are provided.

Disclosure of Invention

The present invention is directed to a plastic mold forming device and method for embedding a nut, so as to solve the problems of the background art.

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

the utility model provides a plastic mould forming device of embedding nut, includes the base and sets up the roof in its top, roof lower extreme bilateral symmetry is equipped with the backup pad of being connected with the base both ends, the base upper end is equipped with down the module, module top is equipped with the module down, be equipped with the chamber of moulding plastics that is used for moulding plastics between module and the last module down, it is used for refrigerated cooling chamber to go up module and the inside cooling chamber that is equipped with of lower module, it is connected with the traction lever lower extreme to go up module upper end intermediate position, the traction lever upper end is connected with the output of lift jar, the lift jar passes through the bolt fastening on the roof, goes up the module and matches with lower module and realize die sinking and compound die under the drive of lift jar, upward be equipped with the fixed subassembly that is used for moulding grinding apparatus surface embedding nut piece.

As a further scheme of the invention: the fixed subassembly is including setting up the piston barrel in last module upper end, and the end of giving vent to anger that the end of inflating of piston barrel passes through air duct and inflator pump is connected, all is equipped with the barometer that is used for monitoring atmospheric pressure on every piston barrel, and the inside sliding fit of every piston barrel has a piston piece, through first spring coupling between the bottom in piston piece and the piston barrel, piston piece lower extreme is equipped with a telescopic link, the telescopic link lower extreme passes the module and goes deep into the intracavity portion of moulding plastics, the telescopic link tip is equipped with and is used for carrying out the setting element fixed with nut piece A.

As a further scheme of the invention: the setting element is including setting up the air guide chamber inside the telescopic link, air guide chamber upper end and piston barrel inner chamber intercommunication, at least one sliding hole has been seted up to air guide chamber lower extreme inner wall, all sliding fit has a piston extrusion post in every sliding hole, and the piston extrusion post tip that is close to the air guide chamber is equipped with the spacing inner panel that is used for preventing the excessive displacement of piston extrusion post, it is fixed through second spring coupling between the locating plate of bottom in spacing inner panel and the air guide chamber, under the effect of second spring, in the piston extrusion post can take in the sliding hole.

As a further scheme of the invention: the elastic coefficient of the second spring is larger than that of the first spring.

As a further scheme of the invention: and a pressing block for pressing the inner wall of the nut block A is arranged at the outer end of the piston extrusion column.

As a further scheme of the invention: the number of the piston extrusion columns is at least two.

As a further scheme of the invention: the top is equipped with the first thermodetector that is used for detecting mould surface temperature in last module, the telescopic link lower extreme is equipped with the second thermodetector that is used for detecting nut block A temperature, first thermodetector and second thermodetector electric connection controller, controller electric connection and lower module and last module matched with cooling module.

As a still further scheme of the invention: the lower end of the telescopic rod is provided with a refrigeration piece which is used for contacting the inner wall of the nut block A and is used for cooling.

The utility model provides a forming method of plastic mould forming device of embedding nut, insert the mounting hole department on the module with the piston piece, then through aerifing the piston barrel, stretch into the injection molding intracavity portion with the telescopic link, will wait that the nut piece A of embedding overlaps at the telescopic link tip again, continue to aerify the piston barrel, make the piston extrusion post slide to the outside, thereby extrude fixedly to nut piece A, then carry out the compound die, pour into the injection molding material into afterwards, the cooling module cooling shaping of rethread, the back is finished in the shaping, the inside gas of piston barrel is let away through the pump, the piston piece can drive the telescopic link upward movement under the effect of first spring, under the effect that loses atmospheric pressure, the piston extrusion post can be taken in the air guide chamber inside, thereby cancel the extrusion and fix, the telescopic link also can be taken in the mounting hole of module inside.

Compared with the prior art, the invention has the beneficial effects that: the invention is designed aiming at the defects of the existing device, can integrally form the nut block A and the injection mold, does not need to worry about the problem of influencing the size of the mold, can detect the temperature gap between the nut block A and the injection mold, avoids the problem of deformation of the mold caused by overlarge temperature difference, and has strong practicability.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic structural view of the fixing member of the present invention.

Wherein: the device comprises a base 11, a lower module 12, an upper module 13, a supporting plate 14, a top plate 15, a traction rod 16, a lifting cylinder 17, a first spring 18, a piston cylinder 19, a piston block 20, an inflator pump 21, a telescopic rod 22, a first temperature detector 23, an injection molding cavity 24, a second temperature detector 25, a second spring 26, a piston extrusion column 27, a limiting inner plate 28, an air guide cavity 29, a positioning plate 30 and a nut block A.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. 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 be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, a nut-embedded plastic mold forming apparatus includes a base 11 and a top plate 15 disposed above the base, the two sides of the lower end of the top plate 15 are symmetrically provided with supporting plates 14 connected with the two ends of the base 11, the upper end of the base 11 is provided with a lower module 12, an upper module 13 is arranged above the lower module 12, an injection molding cavity 24 for injection molding is arranged between the lower module 12 and the upper module 13, cooling cavities for cooling are arranged in the upper module 13 and the lower module 12, the middle position of the upper end of the upper module 13 is connected with the lower end of a traction rod 16, the upper end of the traction rod 16 is connected with the output end of a lifting cylinder 17, the lifting cylinder 17 is fixed on the top plate 15 through a bolt, the upper module 13 is matched with the lower module 12 under the driving of the lifting cylinder 17 to realize the die opening and die closing, the upper module 13 is provided with a fixing component for embedding the nut block A into the surface of the forming grinding tool in the injection molding cavity 24;

the fixing component comprises a piston cylinder 19 arranged at the upper end of the upper module 13, the inflation end of the piston cylinder 19 is connected with the air outlet end of an inflator pump 21 through an air duct, each piston cylinder 19 is provided with a barometer for monitoring air pressure, a piston block 20 is arranged inside each piston cylinder 19 in a sliding fit manner, the lower end of each piston block 20 is provided with a telescopic rod 22, the lower end of each telescopic rod 22 penetrates through the upper module 13 and goes deep into an injection molding cavity 24, the end part of each telescopic rod 22 is provided with a positioning piece for fixing the nut block A, each positioning piece comprises an air guide cavity 29 arranged inside each telescopic rod 22, the upper end of each air guide cavity 29 is communicated with the inner cavity of the corresponding piston cylinder 19, the inner wall of the lower end of each air guide cavity 29 is provided with at least one sliding hole, a piston extrusion column 27 is arranged in each sliding hole in a sliding fit manner, and the outer end of, a limiting inner plate 28 for preventing the piston extrusion column 27 from excessively displacing is arranged at the end part of the piston extrusion column 27 close to the air guide cavity 29, the limiting inner plate 28 is fixedly connected with a positioning plate 30 at the bottom in the air guide cavity 29 through a second spring 26, and the piston extrusion column 27 can be retracted into the sliding hole under the action of the second spring 26;

during actual use, under the action of the first spring 18, the piston block 20 drives the telescopic rod 22 to be drawn out from the injection molding cavity 24, at the moment, the whole fixing assembly cannot interfere with normal injection molding, when a grinding tool needs to be embedded in the later stage, gas is firstly flushed into the piston cylinder 19 through the inflator pump 21, under the action of air pressure, the piston block 20 can drive the telescopic rod 22 to slide downwards, so that the telescopic rod 22 extends into the injection molding cavity 24, then the nut block A to be embedded is sleeved at the lower end of the telescopic rod 22, then the air pressure is further increased, under the action of the air pressure, the limiting inner plate 28 can push the piston extrusion column 27 to move outwards, the piston extrusion column 27 slides outwards to extend out of the sliding hole, and further the inner wall of the nut block A is extruded, so that the nut block A is fixed;

the number of the piston extrusion columns 27 is at least 2, and the symmetrically arranged number can ensure that the fixed nut blocks A are more stable;

the nut block A is fixed at the top in the upper module 13 and is integrally formed with the injection molding cavity 24, so that the nut block A can be initially formed with the injection molding module during injection molding, the nut block is also cooled and fixed with a mold after cooling, and extrusion embedding setting is not needed at a later stage, the embedding mode cannot cause interference on the size of the injection molding mold, the molding quality is guaranteed, and the defects in the prior art are overcome;

the nut block A is made of metal, so the problem of low specific heat capacity needs to be considered, the cooling speed is different from that of an injection mold, the cooling temperature difference between the nut block A and the injection mold needs to be ensured not to be too large, and local deformation is avoided;

the inner top of the upper module 13 is provided with a first temperature detector 23 for detecting the surface temperature of the mold, the lower end of the telescopic rod 22 is provided with a second temperature detector 25 for detecting the temperature of the nut block A, the first temperature detector 23 and the second temperature detector 25 are electrically connected with a controller, the controller is electrically connected with a cooling assembly matched with the lower module 12 and the upper module 13, and when the temperature difference transmitted by the two sensors is detected to be too large, the controller reduces the cooling efficiency of the cooling assembly, so that the problem that the temperature difference between the nut block A and the mold is too large due to the too fast cooling of the mold in the inner cavity of the injection molding cavity 24 can be avoided;

the lower end of the telescopic rod 22 is provided with a refrigeration piece which is used for being in contact with the inner wall of the nut block A and used for cooling, and the refrigeration piece is electrified to generate cold air, so that the nut block A is cooled.

The working principle of the invention is as follows: during the in-service use, insert the mounting hole department on the last module 13 with piston block 20, then through aerifing piston cylinder 19, stretch into the injection mould chamber 24 with telescopic link 22 inside, will treat the nut piece A cover of embedding at telescopic link 22 tip again, continue to aerify piston cylinder 19, make piston extrusion post 27 slide to the outside, thereby extrude fixedly to nut block A, then carry out the compound die, pour into the injection molding material into afterwards, the cooling module cooling shaping of rethread, the shaping back that finishes, the inside gas of piston cylinder 19 is let away through inflator pump 21, piston block 20 can drive telescopic link 22 upward movement under the effect of first spring 18, under the effect that loses atmospheric pressure, piston extrusion post 27 can be received inside air guide cavity 29, thereby cancel the extrusion and fix, telescopic link 22 also can be received in the inside mounting hole of last module 13.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A plastic mold forming device for embedding nuts comprises a base (11) and a top plate (15) arranged above the base, wherein supporting plates (14) connected with two ends of the base (11) are symmetrically arranged on two sides of the lower end of the top plate (15), a lower module (12) is arranged at the upper end of the base (11), an upper module (13) is arranged above the lower module (12), an injection molding cavity (24) for injection molding is arranged between the lower module (12) and the upper module (13), and cooling cavities for cooling are arranged inside the upper module (13) and the lower module (12);

the mold opening and closing device is characterized in that the middle position of the upper end of the upper module (13) is connected with the lower end of a traction rod (16), the upper end of the traction rod (16) is connected with the output end of a lifting cylinder (17), the lifting cylinder (17) is fixed on a top plate (15) through a bolt, the upper module (13) is matched with the lower module (12) under the driving of the lifting cylinder (17) to realize mold opening and mold closing, and a fixing assembly used for embedding a nut block A into the surface of a molding grinding tool in an injection molding cavity (24) is arranged on the upper module (13).

2. The nut-embedded plastic mold forming device as claimed in claim 1, wherein the fixing assembly comprises a piston cylinder (19) arranged at the upper end of the upper module (13), the inflation end of the piston cylinder (19) is connected with the air outlet end of an inflator pump (21) through an air duct, each piston cylinder (19) is provided with a barometer for monitoring air pressure, a piston block (20) is slidably fitted inside each piston cylinder (19), the piston block (20) is connected with the bottom inside the piston cylinder (19) through a first spring (18), the lower end of the piston block (20) is provided with a telescopic rod (22), the lower end of the telescopic rod (22) penetrates through the upper module (13) and penetrates into the injection molding cavity (24), and the end of the telescopic rod (22) is provided with a positioning piece for fixing the nut block a.

3. The nut-embedded plastic mold forming device as claimed in claim 2, wherein the positioning element comprises an air guide cavity (29) arranged inside the telescopic rod (22), the upper end of the air guide cavity (29) is communicated with the inner cavity of the piston cylinder (19), at least one sliding hole is formed in the inner wall of the lower end of the air guide cavity (29), a piston extrusion column (27) is slidably fitted in each sliding hole, a limiting inner plate (28) for preventing the piston extrusion column (27) from excessively displacing is arranged at the end part of the piston extrusion column (27) close to the air guide cavity (29), the limiting inner plate (28) is fixedly connected with the positioning plate (30) at the inner bottom of the air guide cavity (29) through a second spring (26), and the piston extrusion column (27) can be retracted into the sliding hole under the action of the second spring (26).

4. The nut-embedded plastic mold molding device according to claim 3, wherein the second spring (26) has a spring constant greater than that of the first spring (18).

5. The nut-embedded plastic mold forming device as claimed in claim 3, wherein the outer end of the piston extrusion column (27) is provided with a pressing block for pressing against the inner wall of the nut block A.

6. The plastic mold molding apparatus for insert nut as claimed in claim 3, wherein the number of the piston extruding pillars (27) is at least two.

7. The nut-embedded plastic mold forming device as claimed in claim 2, wherein a first temperature detector (23) for detecting the surface temperature of the mold is disposed at the inner top of the upper mold block (13), a second temperature detector (25) for detecting the temperature of the nut block a is disposed at the lower end of the telescopic rod (22), the first temperature detector (23) and the second temperature detector (25) are electrically connected to a controller, and the controller is electrically connected to a cooling assembly which is matched with the lower mold block (12) and the upper mold block (13).

8. The nut-embedded plastic mold molding device as claimed in claim 7, wherein the lower end of the expansion link (22) is provided with a cooling fin for contacting with the inner wall of the nut block A for cooling.

9. A molding method of a nut-embedded plastic mold molding device as claimed in any one of claims 1 to 8, characterized in that a piston block (20) is inserted into a mounting hole on the upper mold block (13), then a piston cylinder (19) is inflated, a telescopic rod (22) is extended into an injection molding cavity (24), a nut block A to be embedded is sleeved on the end of the telescopic rod (22), the piston cylinder (19) is continuously inflated, a piston extrusion column (27) slides outwards to extrude and fix the nut block A, then mold closing is performed, injection molding materials are injected, cooling molding is performed through a cooling assembly, after molding is completed, air in the piston cylinder (19) is discharged through an inflator pump (21), the piston block (20) drives the telescopic rod (22) to move upwards under the action of a first spring (18), and under the action of air pressure loss, the piston extrusion column (27) can be retracted into the air guide cavity (29), so that the extrusion fixation is cancelled, and the telescopic rod (22) can be retracted into the mounting hole in the upper module (13).