CN116572489A - Clamping force adjusting device - Google Patents
Clamping force adjusting device Download PDFInfo
- Publication number
- CN116572489A CN116572489A CN202310627227.8A CN202310627227A CN116572489A CN 116572489 A CN116572489 A CN 116572489A CN 202310627227 A CN202310627227 A CN 202310627227A CN 116572489 A CN116572489 A CN 116572489A
- Authority
- CN
- China
- Prior art keywords
- die
- adjusting
- mold
- plc
- adjusting motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/7653—Measuring, controlling or regulating mould clamping forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/66—Mould opening, closing or clamping devices mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76505—Force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76702—Closure or clamping device
- B29C2945/76709—Closure or clamping device clamping or closing drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76822—Phase or stage of control
- B29C2945/76869—Mould clamping, compression of the cavity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The die locking force adjusting device comprises a die adjusting motor, an output gear synchronous with the die adjusting motor, a large gear meshed with the output gear, four die adjusting gears meshed with the large gear, a rear die plate, four die adjusting nuts arranged on the rear die plate, and four pull rods respectively connected with the four die adjusting nuts in a threaded manner, wherein the four die adjusting gears are respectively fixed on the four die adjusting nuts; the die adjusting motor is connected with a synchronous counting encoder, and a strain sensor is arranged on the pull rod; the die adjusting motor is connected with the PLC through a driver, the PLC is used for controlling forward rotation and reverse rotation of the die adjusting motor, and the PLC is connected with the encoder, the strain sensor and the operation panel; the device for adjusting the mold locking force can realize closed-loop control of mold locking force adjustment, and has high mold adjusting accuracy.
Description
Technical Field
The invention relates to the technical field of injection molding machines, in particular to a mold locking force adjusting device.
Background
The mold opening and closing of the electric injection molding machine is realized by driving a cross head to move through a ball screw by adopting a servo motor, and the cross head is matched with a toggle mechanism to convert rotary motion into linear motion in the mold opening and closing direction. The pressure created by the material in the mold cavity during the injection and dwell stages is called the mold expansion force, and the machine must apply sufficient mold locking force to the mold in order for the mold not to be separated by the mold expansion force. If the mold locking force is insufficient, mold release and flash can occur, but too large mold deformation can occur, so that the service life is shortened, and internal stress and unnecessary energy consumption are generated in the plastic product. At present, the hydraulic motor controls the die adjusting sensitivity to be low, the die adjusting method is complex, the die adjusting precision is low, and the accurate die locking force can not be realized after die adjusting.
Disclosure of Invention
The invention aims to solve the technical problem of providing a die locking force adjusting device with accurate die adjustment aiming at the problems existing in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
the die locking force adjusting device comprises a die adjusting motor, an output gear synchronous with the die adjusting motor, a large gear meshed with the output gear, four die adjusting gears meshed with the large gear, a rear die plate, four die adjusting nuts arranged on the rear die plate, and four pull rods respectively connected with the four die adjusting nuts in a threaded manner, wherein the four die adjusting gears are respectively fixed on the four die adjusting nuts; the die adjusting motor is connected with a synchronous counting encoder, and a strain sensor is arranged on the pull rod; the die adjusting motor is connected with the PLC through a driver, the PLC is used for controlling forward rotation and reverse rotation of the die adjusting motor, and the PLC is connected with the encoder, the strain sensor and the operation panel; the PLC is used for monitoring the rotation number of the die adjusting motor through the encoder; the operation panel is used for presetting a mold locking force; the strain sensor is used for measuring the static tension of the pull rod; the PLC is used for reading the static tension measured by the strain sensor, judging whether the die adjusting motor is over-adjusted according to the preset die locking force, and controlling the die adjusting motor to adjust to the required die locking force.
Preferably, the number of the strain sensors is one, and the strain sensors are arranged on one pull rod.
Preferably, the device also comprises a crankshaft mechanism, a movable template and a static template which are sequentially arranged in front of the rear template; the crankshaft mechanism is connected between the movable template and the rear template, and the pull rod penetrates through the movable template and is fixedly connected with the static template.
Compared with the prior art, the invention has the beneficial effects that:
according to the mold locking force adjusting device, the encoder is used for recording the adjusting data of the mold adjusting motor, so that the collected data is fed back to the PLC controller to judge whether the mold adjusting motor is over-adjusted or not, the mold locking force can be adjusted to the required mold locking force more quickly, closed-loop control of mold locking force adjustment can be achieved, and the mold adjusting accuracy is high.
Drawings
Fig. 1 is a schematic perspective view of an injection molding machine of the mold locking force adjusting device of the present invention.
FIG. 2 is a schematic diagram of a mold clamping force adjusting device according to the present invention.
Reference numerals: 1. a static template; 2. a movable template; 3. a rear template; 4. a crankshaft mechanism; 5. a pull rod; 6. a strain sensor; 7. a die adjusting gear; 8. a large gear; 9. an output gear; 10. a die adjusting motor; 11. an encoder; 12. a PLC controller; 13. an operation panel.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 2, the mold locking force adjusting device comprises a mold adjusting motor 10, an output gear 9 synchronous with the mold adjusting motor 10, a large gear 8 meshed with the output gear 9, four mold adjusting gears 7 meshed with the large gear 8, a rear mold plate 3, four mold adjusting nuts arranged on the rear mold plate 3, four pull rods 5 respectively connected with the four mold adjusting nuts in a threaded manner, and a crankshaft mechanism 4, a movable mold plate 2 and a static mold plate 1 which are sequentially arranged in front of the rear mold plate 3; the die adjusting nut is in a step shape, a nut gland is arranged on the first step, a supporting plate is arranged on the second step, and a nut gasket is arranged on the third step, and the nut gland, the supporting plate, the nut gasket and the rear die plate 3 are tightly connected through screws; the four die adjusting gears 7 are respectively fixed on the four die adjusting nuts; the crank mechanism 4 is connected between the movable template 2 and the rear template 3, and the crank mechanism 4 is connected with a die assembly motor through a ball screw; the pull rod 5 passes through the movable template 2 and is fixedly connected with the static template 1; the die adjusting motor 10 is connected with a synchronous counting encoder 11, and the pull rod 5 is provided with a strain sensor 6; the number of the strain sensors 6 is one, and the strain sensors are arranged on one pull rod 5; the die-adjusting motor 10 is connected with a PLC (programmable logic controller) 12 through a driver, the PLC 12 is used for controlling forward rotation and reverse rotation of the die-adjusting motor 10, and the PLC 12 is connected with an encoder 11, a strain sensor 6, an operation panel 13 and a stop travel switch.
When in use, a mold locking force F is set on the operation panel 13 of the injection molding machine according to different requirements; the PLC 12 controls the die adjusting motor 10 to operate through a driver, the large gear 8 rotates, the four die adjusting nuts rotate in the same direction, the rear die plate 3 retreats along the pull rod 5, and the toggle mechanism and the movable die plate 2 also move backwards along the pull rod 5; the rear template 3 retreats to touch a stop travel switch, the stop travel switch sends a signal to the PLC 12, the die adjusting motor 10 stops, and the rear template 3, the toggle mechanism and the movable template 2 all stop retreating; the die assembly motor drives the ball screw to rotate, the cross head of the toggle mechanism is driven to push forwards, the toggle mechanism straightens towards the direction of the movable die plate 2, and a gap is reserved between the movable die plate 2 and the static die plate 1; stopping the mold closing motor; the control circuit controls the die adjusting motor 10 to reversely run, the large gear 8 rotates, the four die adjusting nuts rotate in the same direction, and the rear die plate 3, the toggle mechanism and the movable die plate 2 all move forwards along the pull rod 5; the male die of the movable template 2 and the female die of the static template 1 are matched, so that the pull rod 5 generates micro-strain extension length, and the deformation generates static tension, and the static tension can be read on a reading meter of the strain sensor 6; the PLC 12 monitors the rotation number of the die adjusting motor 10 through the encoder 11, the PLC 12 fine-adjusts the die adjusting motor 10, so that the displacement of the movable die plate 2 is fine-adjusted, when the static tension measured by the strain sensor 6 on the pull rod 5 is equal to the die locking force F/4, the PLC 12 stops the die adjusting motor 10, and die adjustment is finished.
According to the mold locking force adjusting device, the encoder is used for recording the adjusting data of the mold adjusting motor, so that the collected data is fed back to the PLC controller to judge whether the mold adjusting motor is over-adjusted or not, the mold locking force can be adjusted to the required mold locking force more quickly, closed-loop control of mold locking force adjustment can be achieved, and the mold adjusting accuracy is high.
Finally, it should be noted that: the above embodiments are merely illustrative of the technical solution of the present invention, and not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The die locking force adjusting device comprises a die adjusting motor, an output gear synchronous with the die adjusting motor, a large gear meshed with the output gear, four die adjusting gears meshed with the large gear, a rear die plate, four die adjusting nuts arranged on the rear die plate, and four pull rods respectively connected with the four die adjusting nuts in a threaded manner, wherein the four die adjusting gears are respectively fixed on the four die adjusting nuts; the die-adjusting motor is connected with a synchronous counting encoder, and a strain sensor is arranged on the pull rod; the die adjusting motor is connected with the PLC through a driver, the PLC is used for controlling forward rotation and reverse rotation of the die adjusting motor, and the PLC is connected with the encoder, the strain sensor and the operation panel; the PLC is used for monitoring the rotation number of the die adjusting motor through the encoder; the operation panel is used for presetting a mold locking force; the strain sensor is used for measuring the static tension of the pull rod; the PLC is used for reading the static tension measured by the strain sensor, judging whether the die adjusting motor is over-adjusted according to the preset die locking force, and controlling the die adjusting motor to adjust to the required die locking force.
2. The mold clamping force adjusting device according to claim 1, wherein the number of the strain sensors is one and is provided on one tie rod.
3. The mold locking force adjusting device according to claim 1, further comprising a crank mechanism, a movable mold plate, and a stationary mold plate provided in this order in front of the rear mold plate; the crankshaft mechanism is connected between the movable template and the rear template, and the pull rod penetrates through the movable template and is fixedly connected with the static template.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310627227.8A CN116572489A (en) | 2023-05-31 | 2023-05-31 | Clamping force adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310627227.8A CN116572489A (en) | 2023-05-31 | 2023-05-31 | Clamping force adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116572489A true CN116572489A (en) | 2023-08-11 |
Family
ID=87533995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310627227.8A Pending CN116572489A (en) | 2023-05-31 | 2023-05-31 | Clamping force adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116572489A (en) |
-
2023
- 2023-05-31 CN CN202310627227.8A patent/CN116572489A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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