CN117734127A - Injection molding process and injection molding device - Google Patents
Injection molding process and injection molding device Download PDFInfo
- Publication number
- CN117734127A CN117734127A CN202311753376.5A CN202311753376A CN117734127A CN 117734127 A CN117734127 A CN 117734127A CN 202311753376 A CN202311753376 A CN 202311753376A CN 117734127 A CN117734127 A CN 117734127A
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- clamping
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 94
- 239000007924 injection Substances 0.000 claims abstract description 94
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000004513 sizing Methods 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 241001133184 Colletotrichum agaves Species 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 9
- 239000003292 glue Substances 0.000 description 28
- 239000004033 plastic Substances 0.000 description 11
- 238000013459 approach Methods 0.000 description 2
- 229940125773 compound 10 Drugs 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- ZLVXBBHTMQJRSX-VMGNSXQWSA-N jdtic Chemical compound C1([C@]2(C)CCN(C[C@@H]2C)C[C@H](C(C)C)NC(=O)[C@@H]2NCC3=CC(O)=CC=C3C2)=CC=CC(O)=C1 ZLVXBBHTMQJRSX-VMGNSXQWSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an injection molding process and an injection molding device, comprising a supporting platform, a mold clamping mechanism and an injection mechanism which are arranged on the supporting platform, wherein the mold clamping mechanism comprises a mold clamping servo motor, a mold clamping screw rod connected with a driving shaft of the mold clamping servo motor, a mold clamping movable plate connected with the mold clamping screw rod and a mold clamping head plate fixed on the supporting platform, the opposite sides of the mold clamping movable plate and the mold clamping head plate are respectively provided with a mold back plate and a mold front plate, and the injection mechanism is arranged at the back side of the mold clamping head plate and is used for injecting molten sizing material into a mold cavity formed by mold back plate and mold front plate mold clamping. The invention provides an injection molding process and an injection molding device, which realize high-precision position control by utilizing the high response performance of a servo motor, solve the problem of poor air exhaust in the process of injection molding products, reduce the internal stress of the products and ensure the consistency and stability of product molding.
Description
Technical Field
The invention relates to the field of plastic product forming processes, in particular to an injection molding process and an injection molding device.
Background
Plastic products are increasingly widely used in daily life, and the requirements of people on the plastic products are also increasingly diversified. Injection molding is a process in which plastic melted by an injection machine is introduced into a mold under the thrust of a plunger or screw, and cooled to obtain a product. The conventional plastic molding process has the problems of air trapping, large internal stress and long molding period in the process, and influences the quality of plastic products, so that the prepared plastic products cannot meet the demands of people.
Disclosure of Invention
The invention aims to provide an injection molding process and an injection molding device, which realize high-precision position control by utilizing the high response performance of a servo motor, solve the problem of poor air exhaust in the process of injection molding products, reduce the internal stress of the products and ensure the consistency and stability of product molding.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: an injection molding process comprising the steps of:
(1) The die assembly servo motor drives the die assembly screw rod to rotate, and the die assembly screw rod pushes the die assembly movable plate to horizontally move to drive the die rear plate to be tightly attached to the die front plate to form a die cavity;
(2) The glue injection motor drives the injection screw to rotate in the glue melting cylinder, the melted glue is injected into the die cavity, and the melted glue pushes the die back plate to move backwards and leave the die front plate;
(3) After the molten rubber material continuously fills the die cavity and discharges the gas in the die cavity, the die clamping servo motor acts to apply the die clamping force P to the die clamping movable plate through the die clamping screw rod, and simultaneously the rubber injection motor applies torsion to the injection screw rod to keep the extrusion force of the injection screw rod on the molten rubber material, so that the molten rubber material in the die cavity is prevented from flowing backwards, and the molten rubber material is cooled and molded to obtain a complete product.
According to the technical scheme, the die assembly servo motor is used for controlling the die back plate to be tightly attached to the die front plate to be clamped and form the die cavity, the glue injection motor is used for driving the injection screw to inject molten glue into the die cavity, the molten glue can push the die back plate to move backwards to leave the die front plate, the space generated by the die back plate leaving the die front plate is used for discharging all gas in the die cavity when the molten glue is continuously injected, the problem of poor air discharge of plastic products in the injection molding process is solved, the internal stress and molding cycle of the plastic products are reduced, the pressure maintaining molding process is not needed, and the production efficiency and the product quality are effectively improved.
The injection molding process further comprises the following steps:
(4) After the molten rubber material is filled into the die cavity and the gas in the die cavity is discharged, the die clamping servo motor applies a die clamping force P to the die clamping movable plate through the die clamping screw rod, and simultaneously the rubber injection motor applies a torque force to the injection screw rod, and the injection screw rod continuously pushes the molten rubber material to enter the die cavity until the molten rubber material is completely filled and molded, and the molten rubber material is cooled and molded to obtain a complete product. And (3) applying torque force to the injection screw by the glue injection motor, continuously feeding the molten glue into the die cavity by the injection screw, and cooling and forming the molten glue to obtain a complete product.
In the injection molding process, in the step (1), after the mold clamping servo motor drives the mold back plate to be tightly attached to the mold front plate to form the mold cavity, the mold clamping servo motor is in a free stop state, and no motor torque is provided. The die closing servo motor is in a free stop state, does not provide motor torque, does not apply die closing force to the die closing movable plate, so that when molten rubber is injected subsequently, the molten rubber can push the die back plate to leave the die front plate for a certain distance, and gas in the die cavity is discharged simultaneously in the process of injecting the molten rubber.
In the injection molding process, in the step (2), when the mold closing servo motor detects that the opening position of the mold back plate is deltas, the mold closing servo motor applies a mold closing force to the mold closing movable plate to keep the mold back plate fixed. The position delta S of the opening of the back plate of the die solves the problem of poor exhaust in the prior art, ensures that the molten sizing material can completely exhaust the air in the die cavity, reduces the internal stress of the product and improves the quality of the product.
According to the injection molding process, the die closing servo motor is a servo motor with an encoder, so that the accuracy control for controlling the position of the die closing movable plate is realized. The die assembly servo motor has high response performance and high-precision position detection, and the consistency and stability of products are ensured.
The invention also provides another technical scheme that: an injection molding device applied to the injection molding process in any one of the technical schemes comprises a supporting platform, a mold clamping mechanism and an injection mechanism, wherein the mold clamping mechanism and the injection mechanism are arranged on the supporting platform, the mold clamping mechanism comprises a mold clamping servo motor, a mold clamping screw rod connected with a driving shaft of the mold clamping servo motor, a mold clamping movable plate connected with the mold clamping screw rod and a mold clamping head plate fixed on the supporting platform, a mold back plate and a mold front plate are respectively arranged on opposite sides of the mold clamping movable plate and the mold clamping head plate, and the injection mechanism is arranged on the rear side of the mold clamping head plate and used for injecting molten sizing material into a mold cavity formed by mold back plate and mold front plate mold clamping.
According to the injection molding device, the die clamping screw rod is driven to rotate by the die clamping servo motor, and the die clamping screw rod drives the die clamping movable plate to horizontally move to be close to the die clamping head plate, so that the die rear plate and the die front plate are closely attached to each other to form a die cavity; the injection mechanism injects the molten sizing material into the die cavity, pushes the die back plate for a distance, and discharges the gas in the die cavity in the continuous glue injection process; the mold closing servo motor with the encoder has high response performance and high precision position detection and control, can precisely control the position of the rear plate of the mold and the mold closing force applied to the rear plate of the mold, and ensures the consistency and stability of product molding when plastic products are produced in batches.
In the injection molding device, the supporting platform is provided with the die clamping tail plate, the die clamping servo motor is arranged on the die clamping tail plate, and the die clamping tail plate is connected with the die clamping head plate through the pull rod. The pull rod is connected with the die head plate and the die closing tail plate, and can also play a role in guiding the die closing movable plate.
In the injection molding device, the support platform is provided with the die-closing linear guide rail, and the die-closing movable plate can axially and horizontally move on the die-closing linear guide rail. The mold closing linear guide rail supports the movement of the mold closing movable plate on the support platform.
The injection molding device comprises the injection motor, the injection table front plate and the melt adhesive barrel arranged on the injection table front plate, wherein the melt adhesive barrel is internally provided with the injection screw rod, and the injection motor can horizontally move on the supporting platform and is connected with the injection screw rod. The glue injecting motor is connected with the injection screw rod and drives the injection screw rod to rotate, the glue in the melt glue cylinder is ground into a molten state, and the glue injecting motor horizontally moves to drive the injection screw rod to axially move in the melt glue cylinder to inject glue.
The injection molding device is characterized in that the supporting platform is provided with the injection table linear guide rail and the injection table movable plate, the injection table movable plate can axially and horizontally move on the injection table linear guide rail, and the injection motor is arranged on the injection table movable plate. The injection platform linear guide rail supports the horizontal movement of the injection platform movable plate, the injection platform movable plate drives the glue injection motor to horizontally move on the injection platform linear guide rail, and the injection screw is controlled to axially move in the melt adhesive cylinder to inject glue.
The beneficial effects obtained by the invention are as follows: the invention can well exhaust gas when injecting molten sizing material, has low injection pressure used in the injection process, can greatly reduce the internal stress of products, does not need a pressure maintaining molding process, shortens the molding period of the products, effectively improves the quality of plastic products and improves the production efficiency of the plastic injection molding process.
Drawings
FIG. 1 is a schematic view of an injection molding apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the molten gum material of the present invention being injected into a mold cavity;
FIG. 3 is a schematic view of the structure of the molten gum material of the present invention filling a mold cavity;
FIG. 4 is a schematic drawing showing the close-up of the back and front mold plates after the molten gum material of the present invention has been filled;
fig. 5 is a schematic structural view of an article obtained by the injection molding process of the present invention.
Reference numerals illustrate: the mold clamping servo motor 1, the mold clamping screw rod 2, the mold clamping tail plate 3, the pull rod 4, the mold clamping linear guide rail 5, the mold clamping movable plate 6, the mold back plate 7, the mold front plate 8, the mold clamping head plate 9, the molten rubber 10, the injection screw 11, the melt adhesive cylinder 12, the injection table front plate 13, the injection table movable plate 14, the injection motor 15, the injection table linear guide rail 16, the supporting platform 17 and the product 18.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
Referring to fig. 1 to 5, an injection molding process includes the steps of:
(1) The die assembly servo motor 1 drives the die assembly screw rod 2 to rotate, and the die assembly screw rod 2 pushes the die assembly movable plate 6 to horizontally move to drive the die rear plate 7 to be tightly attached to the die front plate 8 to form a die cavity;
(2) The injection screw 11 is driven by the glue injection motor 15 to rotate in the glue cylinder 12, the molten glue stock 10 is injected into the die cavity, and the molten glue stock 10 pushes the die back plate 7 to move backwards to leave the die front plate 8;
(3) After the molten rubber material 10 continuously fills the die cavity and discharges the die cavity gas, the die clamping servo motor 1 acts, the die clamping screw rod 2 applies the die clamping force P to the die clamping movable plate 6, meanwhile, the rubber injection motor 15 applies torsion to the injection screw rod 11, the extrusion force of the injection screw rod 11 to the molten rubber material 10 is kept, the molten rubber material 10 in the die cavity is prevented from flowing backwards, and the molten rubber material 10 is cooled and molded to obtain a complete product 18.
The injection molding process further comprises the steps of:
(4) After the molten rubber material 10 fills the mold cavity and discharges the mold cavity gas, the mold closing servo motor 1 applies mold closing force P to the mold closing movable plate 6 through the mold closing screw rod 2, meanwhile, the rubber injection motor 15 applies torsion to the injection screw rod 11, and the injection screw rod 11 continues to push the molten rubber material 10 into the mold cavity until the molten rubber material 10 is completely filled and molded, and a complete product 18 is obtained after the molten rubber material 10 is cooled and molded.
In step (1), after the mold clamping servo motor 1 drives the mold back plate 7 to abut against the mold front plate 8 to form a mold cavity, the mold clamping servo motor 1 is in a free stop state, and no motor torque is provided.
In step (2), when the mold clamping servo motor 1 detects that the position where the mold back plate 7 is opened is Δs, the mold clamping servo motor 1 applies a mold clamping force to the mold movable plate 6 to keep the mold back plate 7 stationary.
The die closing servo motor 1 is a servo motor with an encoder, and achieves precision control for controlling the position of the die closing movable plate 6.
Referring to fig. 1 to 5, an injection molding apparatus applied to the injection molding process according to the above embodiment includes a support platform 17, a mold clamping mechanism and an injection mechanism provided on the support platform 17, the mold clamping mechanism including a mold clamping servo motor 1, a mold clamping screw 2 connected to a driving shaft of the mold clamping servo motor 1, a mold clamping movable plate 6 connected to the mold clamping screw 2, and a mold clamping head plate 9 fixed on the support platform 17, a mold back plate 7 and a mold front plate 8 being provided on opposite sides of the mold clamping movable plate 6 to the mold clamping head plate 9, respectively, and the injection mechanism being provided on a rear side of the mold clamping head plate 9 for injecting a molten rubber compound 10 into a cavity formed by mold closing the mold back plate 7 and the mold front plate 8.
The supporting platform 17 is provided with a die clamping tail plate 3, the die clamping servo motor 1 is arranged on the die clamping tail plate 3, and the die clamping tail plate 3 is connected with the die clamping head plate 9 through a pull rod 4.
The support platform 17 is provided with a die-closing linear guide rail 5, and the die-closing movable plate 6 can axially and horizontally move on the die-closing linear guide rail 5.
The injection mechanism comprises an injection motor 15, an injection table front plate 13 and a melt adhesive cylinder 12 arranged on the injection table front plate 13, wherein an injection screw 11 is arranged in the melt adhesive cylinder 12, and the injection motor 15 can horizontally move on a supporting platform 17 and is connected with the injection screw 11.
The supporting platform 17 is provided with a shooting table linear guide rail 16 and a shooting table movable plate 14, the shooting table movable plate 14 can axially and horizontally move on the shooting table linear guide rail 16, and the glue injection motor 15 is arranged on the shooting table movable plate 14.
In the concrete implementation of the invention, the mold clamping servo motor 1 is provided with an encoder, and the encoder drives the mold clamping screw rod 2 to rotate and controls the position of the mold clamping movable plate 6 on the supporting platform 17, thereby realizing high-precision control. The die clamping servo motor 1 drives the die clamping screw rod 2 to rotate, and the die clamping screw rod 2 drives the die clamping movable plate 6 to axially and horizontally move on the die clamping linear guide rail 5 in a threaded connection mode. The movable die closing plate 6 horizontally approaches to the die closing head plate 9, drives the die back plate 7 arranged on the movable die closing plate to approach to the die front plate 8 arranged on the die closing head plate 9 until the die back plate 7 and the die front plate 8 are closed to form a die cavity. The pull rod 4 passes through the movable die clamping plate 6, and two ends of the pull rod are connected to the movable die clamping head plate 9 and the movable die clamping tail plate 3, so that the movable die clamping plate 6 is supported and guided to move.
The injection screw 11 is driven by the injection motor 15 to rotate, and the injection screw 11 is arranged in the melt adhesive cavity of the melt adhesive cylinder 12 in a threaded connection manner, and has a movement along the axial direction of the melt adhesive cylinder 12 when the injection screw 11 rotates. The injection screw 11 rotates in the melt cylinder 12, the glue stock is ground into a molten state to form the molten glue stock 10, and when the injection screw 11 moves in the melt cylinder 12 in the direction of the front die plate 8 due to the axial movement of the injection screw 11 caused by the rotation, the molten glue stock 10 is extruded into a die cavity formed by the die assembly of the front die plate 8 and the rear die plate 7.
The molten rubber material 10 continues to enter the mold cavity and, when entering a certain amount, pushes the mold back plate 7 to move backward by a distance deltas, at this time, the mold closing servo motor 1 acts, and a mold closing force P is applied to the mold closing movable plate 6, so that the mold back plate 7 is not far from the mold front plate 8. The molten compound 10 continues into the mold cavity and air in the mold cavity is vented from the gap after the mold back plate 7 and the mold front plate 8 are separated by a length of deltas until the mold cavity is filled. The molten rubber material 10 is in the mold cavity to discharge the air in the mold cavity, and the injection pressure of the injection screw 11 is low, so that the stress to which the molten rubber material 10 is subjected is greatly reduced, a pressure maintaining process is not needed, and the molding period of the product is shortened.
In summary, the present invention has been described and illustrated in the specification, and has been made into practical samples and tested for multiple uses, and from the effect of the use test, it can be proved that the present invention can achieve its intended purpose, and the practical value is undoubted. The above embodiments are only for illustrating the present invention, and are not to be construed as limiting the invention in any way, and any person having ordinary skill in the art will realize that equivalent embodiments of partial changes and modifications can be made by using the disclosed technology without departing from the scope of the technical features of the present invention.
Claims (10)
1. An injection molding process comprising the steps of:
(1) The die assembly servo motor (1) drives the die assembly screw rod (2) to rotate, and the die assembly screw rod (2) pushes the die assembly movable plate (6) to horizontally move to drive the die rear plate (7) to be tightly attached to the die front plate (8) to form a die cavity;
(2) The injection motor (15) drives the injection screw (11) to rotate in the melt adhesive cylinder (12) to inject the molten adhesive (10) into the die cavity, and the molten adhesive (10) pushes the die back plate (7) to move backwards to leave the die front plate (8);
(3) After the molten rubber material (10) continuously fills the die cavity and discharges the die cavity gas, the die clamping servo motor (1) acts, the die clamping force P is applied to the die clamping movable plate (6) through the die clamping screw rod (2), simultaneously the rubber injection motor (15) applies torsion to the injection screw rod (11), the extrusion force of the injection screw rod (11) to the molten rubber material (10) is kept, the molten rubber material (10) in the die cavity is prevented from flowing backwards, and the molten rubber material (10) is cooled and molded to obtain a complete product (18).
2. The injection molding process according to claim 1, wherein: the injection molding process further comprises the steps of:
(4) After the molten rubber material (10) fills the die cavity and discharges the air of the die cavity, the die clamping servo motor (1) applies a die clamping force P to the die clamping movable plate (6) through the die clamping screw rod (2), meanwhile, the rubber injection motor (15) applies torsion to the injection screw rod (11), the injection screw rod (11) continuously pushes the molten rubber material (10) into the die cavity until the molten rubber material (10) is completely filled and molded, and a complete product (18) is obtained after the molten rubber material (10) is cooled and molded.
3. The injection molding process according to claim 1, wherein: in the step (1), after the mold clamping servo motor (1) drives the mold back plate (7) to be closely attached to the mold front plate (8) to form a mold cavity, the mold clamping servo motor (1) is in a free stop state, and no motor torque is provided.
4. The injection molding process according to claim 1, wherein: in the step (2), when the mold closing servo motor (1) detects that the position where the mold back plate (7) is opened is deltas, the mold closing servo motor (1) applies a mold closing force to the mold movable plate (6) to keep the mold back plate (7) stationary.
5. The injection molding process according to claim 1, wherein: the die closing servo motor (1) is a servo motor with an encoder, and the precision control for controlling the position of the die closing movable plate (6) is realized.
6. Injection molding apparatus for use in the injection molding process according to any one of claims 1 to 5, characterized in that: the automatic mold clamping device comprises a supporting platform (17), a mold clamping mechanism and an injection mechanism, wherein the mold clamping mechanism and the injection mechanism are arranged on the supporting platform (17), the mold clamping mechanism comprises a mold clamping servo motor (1), a mold clamping screw rod (2) connected with a driving shaft of the mold clamping servo motor (1), a mold clamping movable plate (6) connected with the mold clamping screw rod (2) and a mold clamping head plate (9) fixed on the supporting platform (17), a mold back plate (7) and a mold front plate (8) are respectively arranged on the opposite side surfaces of the mold clamping movable plate (6) and the mold clamping head plate (9), and the injection mechanism is arranged on the rear side of the mold clamping head plate (9) and used for injecting molten sizing material (10) into a mold cavity formed by mold back plate (7) and mold front plate (8).
7. The injection molding apparatus of claim 6, wherein: the support platform (17) is provided with a die clamping tail plate (3), the die clamping servo motor (1) is arranged on the die clamping tail plate (3), and the die clamping tail plate (3) is connected with the die clamping head plate (9) through a pull rod (4).
8. The injection molding apparatus of claim 7, wherein: the support platform (17) is provided with a die-closing linear guide rail (5), and the die-closing movable plate (6) can axially and horizontally move on the die-closing linear guide rail (5).
9. The injection molding apparatus of claim 6, wherein: the injection mechanism comprises an injection motor (15), an injection table front plate (13) and a melt adhesive cylinder (12) arranged on the injection table front plate (13), an injection screw (11) is arranged in the melt adhesive cylinder (12), and the injection motor (15) can horizontally move on a supporting platform (17) and is connected with the injection screw (11).
10. The injection molding apparatus of claim 9, wherein: the supporting platform (17) is provided with a shooting table linear guide rail (16) and a shooting table movable plate (14), the shooting table movable plate (14) can axially and horizontally move on the shooting table linear guide rail (16), and the shooting motor (15) is arranged on the shooting table movable plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311753376.5A CN117734127A (en) | 2023-12-19 | 2023-12-19 | Injection molding process and injection molding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311753376.5A CN117734127A (en) | 2023-12-19 | 2023-12-19 | Injection molding process and injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734127A true CN117734127A (en) | 2024-03-22 |
Family
ID=90255829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311753376.5A Pending CN117734127A (en) | 2023-12-19 | 2023-12-19 | Injection molding process and injection molding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734127A (en) |
-
2023
- 2023-12-19 CN CN202311753376.5A patent/CN117734127A/en active Pending
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