CN114889061A

CN114889061A - Injection mold

Info

Publication number: CN114889061A
Application number: CN202210749461.3A
Authority: CN
Inventors: 刘柠铨
Original assignee: Chengdu Zeya Technology Development Co ltd
Current assignee: Chengdu Zeya Technology Development Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-08-12
Anticipated expiration: 2042-06-29
Also published as: CN114889061B

Abstract

The invention provides an injection mold which comprises an upper mold, a lower mold, a glue injection head and a sealing mechanism. The top of the upper die is provided with a glue injection port. The glue injection head is matched with the glue injection opening to be arranged, so that the glue injection head can be connected to the glue injection opening. The sealing mechanism is matched with the glue injection port to be arranged, so that the sealing mechanism can open or close the glue injection port. The sealing mechanism is provided with a sealing plug. When the sealing mechanism seals the glue injection port, the sealing plug is flush with the inner wall of the mold cavity of the upper mold. After the glue injection head injects molten glue into the mold cavity through the glue injection port, the sealing mechanism enables the sealing plug to seal the glue injection port. And opening the upper die and the lower die after the glue solution is cooled, and taking out the injection molding piece. After the injection mold is injected with glue, the sealing plug is used for compacting, so that redundant parts cannot be formed, and the waste is reduced.

Description

Injection mold

Technical Field

The invention relates to the technical field of injection molding equipment, in particular to an injection mold.

Background

Injection molding is a common processing method for plastic products. An injection mold comprises two or more molds that cooperate with each other. A plurality of moulds can enclose out the injection molding chamber. Injecting molten plastic glue into the injection molding cavity through an injection molding machine. And cooling the glue solution, and then demoulding to obtain the plastic product with the same shape as the injection molding cavity.

The mould is generally provided with an injection molding hole communicated with the injection molding cavity, and the glue solution can be injected into the injection molding cavity through the injection molding hole. This also makes the glue in the injection hole form an excess part on the product after the injection. This portion needs to be cut off, increasing the amount of work. Meanwhile, the part also causes a certain waste of raw materials and is poor in economical efficiency.

Disclosure of Invention

The invention aims to provide an injection mold which can avoid waste.

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

an injection mold comprises an upper mold, a lower mold, a glue injection head and a sealing mechanism; the top of the upper die is provided with a glue injection port; the glue injection head is matched with the glue injection port, so that the glue injection head can be connected to the glue injection port; the sealing mechanism is matched with the glue injection port, so that the sealing mechanism can open or close the glue injection port; the sealing mechanism is provided with a sealing plug; when the sealing mechanism seals the glue injection port, the sealing plug is flush with the inner wall of the die cavity of the upper die.

Furthermore, an accommodating cavity for accommodating the sealing mechanism is arranged in the upper die; the sealing mechanism comprises a driving motor, a lead screw pair, a lantern ring, a connecting rod and a sealing plug; a screw rod of the screw rod pair is vertically arranged and connected to the driving motor; a lantern ring is rotatably sleeved outside the nut of the lead screw pair; the lantern ring is connected to the sealing plug through the connecting rod; a guide hole for the connecting rod to pass through is formed between the accommodating cavity and the glue injection port, so that the connecting rod extends into the glue injection port; the guide hole is arranged obliquely to the screw rod, so that when the connecting rod moves along with the nut, the connecting rod rotates around the screw rod under the guidance of the guide hole.

Further, the guide hole comprises a parallel section and a deflection section; the parallel section is arranged in parallel to the screw; the deflection section is arranged obliquely to the screw; the parallel section is located below the deflection section.

Furthermore, the nut is also provided with a guide rod in a matching way; the guide rod is arranged in parallel to the screw rod; the nut is matched with the guide rod and is provided with a sliding hole.

Further, the glue injection head is provided with a glue injection pipe and an air exhaust duct; when the glue injection butt joint is connected with the glue injection port, the glue injection pipe is right opposite to the glue injection port, and the air exhaust duct is communicated with the glue injection port.

Furthermore, the glue injection head is also provided with a lifting motor and a driving gear; the driving gear is arranged in the glue injection head and is in transmission connection with the driving motor; the driving gear is annular and is provided with internal threads; the glue injection pipe is matched with the internal thread and is provided with an external thread, so that when the driving gear rotates, the glue injection pipe stretches into or withdraws from the glue injection port.

Further, the inner diameter of the upper end of the glue injection port is larger than that of the lower end of the glue injection port; the front end of the glue injection pipe is in a round table shape, so that the part of the glue injection pipe extends into the lower part of the glue injection port and is blocked by the lower part of the glue injection port.

Further, the glue injection head is further provided with a manipulator in a matched mode, so that the glue injection head can be in butt joint with the glue injection port or separated from the glue injection port.

Furthermore, the opening of the glue injection port is in a flaring shape; the opening of the glue injection port is also provided with a magnet in a matching mode with the glue injection head, so that when the glue injection head is in butt joint with the glue injection port, the magnet adsorbs the glue injection head.

Further, the upper die and the lower die are both provided with cooling pipes.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

when the injection mold is used, the upper mold and the lower mold are firstly closed. Meanwhile, the glue injection head is in butt joint with the glue injection port. The sealing plug is controlled through the sealing mechanism, and then the sealing plug is enabled to open the glue injection head. After the glue injection head injects molten glue into the mold cavity through the glue injection port, the sealing mechanism enables the sealing plug to seal the glue injection port. And opening the upper die and the lower die after the glue solution is cooled, and taking out the injection molding piece. In actual use, the glue injection amount is well controlled, so that the sealing plug is tightly plugged and level with the inner wall of the cavity of the upper die, the sealing plug tightly presses the glue solution, and the hydraulic pressure of the glue solution in the cavity is appropriate.

After the injection mold is injected with glue, the sealing plug is used for compacting, so that redundant parts cannot be formed, and the waste is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an injection mold provided by the present invention;

FIG. 2 is a schematic diagram of the sealing mechanism and the glue injection port;

FIG. 3 is an enlarged view taken at a in FIG. 1;

fig. 4 is a schematic view of the glue injection pipe extending into the glue injection port.

Icon: 1-upper die, 11-glue injection port, 12-containing cavity, 13-parallel section, 14-deflection section, 15-magnet, 2-lower die, 3-glue injection head, 31-glue injection pipe, 32-air exhaust channel, 33-lifting motor, 34-driving gear, 4-sealing mechanism, 41-sealing plug, 42-driving motor, 43-nut, 45-connecting rod, 46-screw rod, 47-lantern ring, 48-guiding rod and 5-cooling pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all embodiments of the present invention. The components of embodiments of the present invention 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

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 if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1-4, the present invention provides an injection mold, which includes an upper mold 1, a lower mold 2, a glue injection head 3, and a sealing mechanism 4. The top of the upper die 1 is provided with a glue injection port 11. The glue injection port 11 is vertically communicated with the mold cavity downwards. The glue injection head 3 is arranged in a matching mode with the glue injection opening 11, so that the glue injection head 3 can be connected to the glue injection opening 11. The glue injection head 3 may be fixedly disposed on the upper mold 1 and connected to the glue injection port 11, or may be detachably disposed with respect to the upper mold 1. The sealing mechanism 4 is arranged in a manner of being matched with the glue injection port 11, so that the sealing mechanism 4 can open or close the glue injection port 11. The sealing mechanism 4 is provided with a sealing stopper 41. When the sealing mechanism 4 seals the glue injection port 11, the sealing plug 41 is flush with the inner wall of the cavity of the upper die 1.

When the injection mold is used, an upper mold 1 and a lower mold 2 are firstly closed. Meanwhile, the glue injection head 3 is butted with the glue injection port 11. The sealing plug 41 is controlled by the sealing mechanism 4, so that the sealing plug 41 opens the glue injection head 3. After the filling head 3 fills the molten glue into the mold cavity through the filling opening 11, the sealing mechanism 4 seals the filling opening 11 with the sealing plug 41. And opening the upper die 1 and the lower die 2 after the glue solution is cooled, and taking out the injection molding piece. In actual use, the glue injection amount is well controlled, so that the sealing plug 41 compresses the glue solution when the sealing plug 41 is plugged tightly and is flush with the inner wall of the mold cavity of the upper mold 1, and the hydraulic pressure of the glue solution in the mold cavity is appropriate.

After the injection mold is injected with glue, the glue is compacted through the sealing plug 41, so that redundant parts cannot be formed, and waste is reduced. The glue injection port 11 is vertically communicated with the mold cavity downwards, so that glue can vertically fall into the mold cavity, and the glue is prevented from being remained on the inner wall of the glue injection port 11. And waste is reduced more favorably.

In this embodiment, the upper die 1 is provided with an accommodating cavity 12 for accommodating the sealing mechanism 4. The sealing mechanism 4 comprises a driving motor 42, a lead screw pair, a sleeve ring 47, a connecting rod 45 and a sealing plug 41. The screw rod 46 of the screw pair is vertically arranged and connected to the driving motor 42. Specifically, in order to reduce the thickness of the upper die 1, the drive motor 42 is horizontally disposed. A bevel gear is connected to the drive motor 42. The screw 46 is also provided with a bevel gear. The two bevel gears mesh, thereby enabling the drive motor 42 to drive the screw 46 in rotation. The outer part of the nut 43 of the screw pair is rotatably sleeved with a lantern ring 47. The collar 47 is connected to the sealing plug 41 by a connecting rod 45. A guide hole for the connecting rod 45 to pass through is arranged between the accommodating cavity 12 and the glue injection port 11, so that the connecting rod 45 extends into the glue injection port 11. So that the sealing plug 41 at one end of the connecting rod 45 is positioned inside the glue filling opening 11. The guide hole is arranged obliquely to the screw 46 so that the link 45 rotates about the screw 46 under the guidance of the guide hole when the link 45 follows the movement of the nut 43.

In use, the drive motor 42 rotates, which in turn rotates the screw 46 and causes the nut 43 to move up and down relative to the screw 46. This causes the collar 47 to lift the rod 45 and the closure 41. Under the guiding action of the guiding hole, the guiding rod 48 not only follows the collar 47 to move up and down, but also rotates around the screw rod 46. So that the connecting rod 45 drives the sealing plug 41 to swing right above the glue injection port 11 and seals the glue injection port 11; or the sealing plug 41 is driven to swing to one side of the glue filling opening 11, so that the glue filling opening 11 is opened.

During glue injection, the sealing plug 41 swings to one side of the glue injection port 11 and opens the glue injection port 11, so that glue solution conveyed by the glue injection head 3 can be injected into the mold cavity. After the glue injection is finished, the glue injection opening 11 is sealed by the sealing plug 41. The glue injection port 11 can be conveniently opened or closed through the sealing mechanism 4.

In this embodiment, the pilot hole includes a parallel section 13 and a deflection section 14. The parallel section 13 is arranged parallel to the screw 46. The deflecting segment 14 is arranged obliquely to the screw 46. The parallel section 13 is located below the deflecting section 14.

When the nut 43 descends, the connecting rod 45 first deflects along the deflecting section 14, so that the sealing plug 41 deflects to a position right above the glue injection opening 11. Subsequently, the link 45 descends along the parallel section 13. In the process, the sealing plug 41 gradually descends to seal the glue injection port 11.

In this embodiment, the nut 43 is further provided with a guide rod 48. The guide rod 48 is disposed parallel to the screw 46. The nut 43 is provided with a slide hole in cooperation with the guide bar 48. The guide bar 48 makes the lifting and lowering of the nut 43 more smooth. At the same time, the guide bar 48 prevents the nut 43 from rotating with the screw 46 and being unable to be raised or lowered.

In this embodiment, the glue injection head 3 is provided with a glue injection pipe 31 and an air exhaust duct 32. When the glue injection head 3 is butted with the glue injection port 11, the glue injection pipe 31 is just opposite to the glue injection port 11, and the air exhaust duct 32 is communicated with the glue injection port 11.

After the glue injection head 3 is connected to the glue injection port 11, the vacuum pump connected to the air exhaust duct 32 is used to evacuate, so as to form a vacuum in the mold cavity. Then, glue is injected through the glue injection pipe 31. The air in the die cavity is prevented from causing air bubbles in the injected glue by vacuumizing. Better guarantee injecting glue quality. For better evacuation of air, the evacuation can be carried out in stages. I.e. the mould cavity is firstly vacuumized and then part of glue is injected. Then vacuumizing and injecting glue. The times of the combined actions of vacuumizing and glue injection can be set according to specific requirements. When the vacuum degree in the die cavity reaches a certain value, the vacuumizing effect of the vacuum pump is gradually reduced. At the moment, the air density in the die cavity can be increased by injecting part of glue solution, so that secondary vacuum pumping is facilitated. Air can be better pumped out through segmented vacuumizing and glue injection, and bubbles are avoided.

In this embodiment, the glue injection head 3 is further provided with a lifting motor 33 and a driving gear 34. The driving gear 34 is disposed inside the glue injection head 3 and is connected to the driving motor 42 in a transmission manner. Specifically, an annular groove may be provided inside the glue injection head 3 and the driving gear 34 may be caught in the annular groove. Such that the drive gear 34 is confined and able to rotate within the annular groove. The driving gear 34 is annular and provided with an internal thread. The glue injection pipe 31 is provided with an external thread matching with the internal thread, so that when the driving gear 34 rotates, the glue injection pipe 31 extends into or withdraws from the glue injection port 11.

After the vacuum pumping is finished, the glue injection pipe 31 is lowered to be close to the inside of the mold cavity through the lifting motor 33, and then glue injection is performed. Therefore, the glue solution can enter the mold cavity after coming out, and the glue solution is better prevented from remaining in the glue injection port 11. And after the glue injection is finished, the glue injection pipe 31 is retracted.

In this embodiment, the inner diameter of the upper end of the glue injection port 11 is larger than the inner diameter of the lower end. And further, the glue injection pipe 31 can smoothly go up and down along the glue injection port 11. The front end of the glue injection pipe 31 is in a circular truncated cone shape, so that part of the glue injection pipe 31 extends into the lower part of the glue injection port 11 and is blocked by the lower part of the glue injection port 11. Therefore, after the glue injection pipe 31 is in butt joint with the glue injection port 11, the glue injection pipe and the glue injection port are connected tightly, and the sealing performance is better. Therefore, the pressure applied to the glue solution by the injection molding machine can be better transmitted to the inside of the mold cavity, and the glue injection effect is ensured.

In order to match with the sectional vacuum pumping and glue injection, the glue injection pipe 31 extends into and is connected with the glue injection port 11 for glue injection after the first section is vacuumized. Then the glue injection port 11 is separated and the second stage of vacuum pumping is carried out through the air pumping duct 32. And then the glue filling opening 11 is connected again for glue filling. And the step of segmented vacuumizing and glue injection can be completed after multiple cycles.

In this embodiment, the injecting glue head 3 still cooperates and is provided with the manipulator to make injecting glue head 3 can dock in injecting glue mouth 11 or from injecting glue mouth 11 separation to some great injection molding processing, need longer time after moulding plastics and cool off just can the drawing of patterns. Longer latency reduces efficiency. Meanwhile, the glue solution in the glue injection head 3 needs to be heated to keep a molten state, so that energy waste is caused. The manipulator is arranged, so that the glue injection head 3 can be moved to the next mould for glue injection after glue injection of one mould is completed. Thereby making the glue injection head 3 always in the glue injection state. The efficiency is improved, the heat preservation time is shortened, and the energy is saved. Before the glue injection head 3 is removed, the glue injection opening 11 is sealed through the sealing plug 41.

In this embodiment, the opening of the glue injection port 11 is flared. The flaring opening has a guiding effect, and then the glue injection head 3 can be easily butted with the glue injection opening 11. The opening of injecting glue mouth 11 still cooperates injecting glue head 3 to be provided with magnet 15 to when making injecting glue head 3 dock in injecting glue mouth 11, magnet 15 adsorbs injecting glue head 3. The magnet 15 is arranged so that the glue injection head 3 is more stably connected to the glue injection port 11.

In this embodiment, the upper die 1 and the lower die 2 are each provided with a cooling pipe 5. The cooling water is introduced into the cooling pipe 5, so that the cooling can be carried out more quickly, and the production efficiency is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold is characterized in that: comprises an upper die (1), a lower die (2), a glue injection head (3) and a sealing mechanism (4); the top of the upper die (1) is provided with a glue injection port (11); the glue injection head (3) is arranged in a matched mode with the glue injection port (11) so that the glue injection head (3) can be connected to the glue injection port (11); the sealing mechanism (4) is arranged in a matching manner with the glue injection port (11) so that the sealing mechanism (4) can open or close the glue injection port (11); the sealing mechanism (4) is provided with a sealing plug (41); when sealing mechanism (4) seals injecting glue mouth (11), seal stopper (41) flush in go up the die cavity inner wall of mould (1).

2. An injection mold according to claim 1, characterized in that: an accommodating cavity (12) for accommodating the sealing mechanism (4) is formed in the upper die (1); the sealing mechanism (4) comprises a driving motor (42), a lead screw pair, a sleeve ring (47), a connecting rod (45) and a sealing plug (41); a screw rod (46) of the screw rod pair is vertically arranged and connected to the driving motor (42); a lantern ring (47) is rotatably sleeved outside a nut (43) of the screw pair; the lantern ring (47) is connected to the sealing plug (41) through the connecting rod (45); a guide hole for the connecting rod (45) to pass through is formed between the accommodating cavity (12) and the glue injection port (11), so that the connecting rod (45) extends into the glue injection port (11); the guide hole is arranged obliquely to the screw (46) so that the link (45) rotates around the screw (46) under the guidance of the guide hole when the link (45) moves following the nut (43).

3. An injection mold according to claim 2, characterized in that: the guide hole comprises a parallel section (13) and a deflection section (14); the parallel section (13) is arranged parallel to the screw (46); the deflection section (14) is arranged obliquely to the threaded rod (46); the parallel section (13) is located below the deflection section (14).

4. An injection mold according to claim 3, characterized in that: the nut (43) is also provided with a guide rod (48) in a matching way; the guide rod (48) is arranged parallel to the screw (46); the nut (43) is provided with a sliding hole in cooperation with the guide rod (48).

5. An injection mold according to claim 4, wherein: the glue injection head (3) is provided with a glue injection pipe (31) and an air exhaust duct (32); when the glue injection head (3) is in butt joint with the glue injection port (11), the glue injection pipe (31) is right opposite to the glue injection port (11) and the air exhaust duct (32) is communicated with the glue injection port (11).

6. An injection mold according to claim 5, wherein: the glue injection head (3) is also provided with a lifting motor (33) and a driving gear (34); the driving gear (34) is arranged inside the glue injection head (3) and is in transmission connection with the driving motor (42); the driving gear (34) is annular and is provided with internal threads; the glue injection pipe (31) is matched with the internal thread and is provided with an external thread, so that when the driving gear (34) rotates, the glue injection pipe (31) extends into or withdraws from the glue injection port (11).

7. An injection mold according to claim 6, wherein: the inner diameter of the upper end of the glue injection port (11) is larger than that of the lower end; the front end of the glue injection pipe (31) is in a circular truncated cone shape, so that the part of the glue injection pipe (31) extends into the lower part of the glue injection port (11) and is blocked by the lower part of the glue injection port (11).

8. An injection mold according to claim 7, wherein: the glue injection head (3) is further provided with a manipulator in a matching mode, so that the glue injection head (3) can be in butt joint with the glue injection port (11) or separated from the glue injection port (11).

9. An injection mold according to claim 8, wherein: the opening of the glue injection port (11) is flared; the opening of injecting glue mouth (11) still cooperates injecting glue head (3) are provided with magnet (15), so that injecting glue head (3) dock in when injecting glue mouth (11), magnet (15) adsorb injecting glue head (3).

10. An injection mold according to claim 9, wherein: the upper die (1) and the lower die (2) are both provided with cooling pipes (5).