CN111660518B - Method and device for eliminating overshoot of compression molding die assembly of injection molding machine - Google Patents
Method and device for eliminating overshoot of compression molding die assembly of injection molding machine Download PDFInfo
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- CN111660518B CN111660518B CN202010378968.3A CN202010378968A CN111660518B CN 111660518 B CN111660518 B CN 111660518B CN 202010378968 A CN202010378968 A CN 202010378968A CN 111660518 B CN111660518 B CN 111660518B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 33
- 238000000748 compression moulding Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- B29C45/762—Measuring, controlling or regulating the sequence of operations of an injection cycle
-
- 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
- B29C2945/76648—Sequence, e.g. the order in which operations are conducted
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a method and a device for eliminating the influence of mold closing overshoot of compression molding of an injection molding machine on mold closing precision; the method comprises the steps of controlling a movable template to be matched; stopping driving of the movable template when the movable template moves to a first preset position; acquiring an overshoot position of the movable template after the driving of the movable template is stopped; when the movable mould plate is positioned at the overshoot position, the pull rod internal contracting brake is controlled and driven to execute the mould locking action; when the mold locking action is executed, the movable mold plate is pulled by the pull rod to move towards the direction close to the static mold plate. The invention can eliminate the influence on the mold closing precision caused by mold closing overshoot in the compression molding of the injection molding machine, so as to improve the repeated precision and the positioning precision of the mold closing of the template to the mold closing position, execute the injection action before the movable template and the static template are attached, and reduce the time of the compression process.
Description
Technical Field
The invention relates to the technical field of compression molding of injection molding machines, in particular to a method and a device for eliminating overshoot of mold closing in compression molding of an injection molding machine.
Background
When an injection molding machine is used for compression molding of a product, the injection molding machine is generally used for directly closing the mold to the end, when the mold is closed, the movable mold plate continuously moves until the movable mold plate is attached to the static mold plate, the driving of the movable mold plate is stopped, and then the pull rod contracting brake is started to execute the mold locking action.
In the mold closing process, when the movable mold plate is stopped to be driven, the movable mold plate still has kinetic energy due to the inertia of the movable mold plate, the movable mold plate is stopped to be driven when the movable mold plate is attached to the fixed mold plate, the kinetic energy of the movable mold plate is inevitably applied to the fixed mold plate and generates a certain overshoot, the overshoot of the movable mold plate influences the mold closing precision, the repeated precision of mold closing is greatly damaged along with the accumulation of mold closing times, and the mold closing positioning precision is greatly damaged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for eliminating overshoot of compression molding die closing of an injection molding machine, and aims to solve the problem that the overshoot of die closing affects the repeated precision of die closing of the injection molding machine in the die closing process.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for eliminating overshoot of a compression molding die of an injection molding machine is characterized by comprising the following steps:
controlling the movable template to be matched; stopping driving of the movable template when the movable template moves to a first preset position;
acquiring an overshoot position of the movable template after the driving of the movable template is stopped;
when the movable mould plate is positioned at the overshoot position, the pull rod internal contracting brake is controlled and driven to execute the mould locking action; when the mode locking action is executed, the movable template is pulled by the pull rod to move towards the direction close to the static template;
and starting the injection action when the movable mould plate moves to the second preset position in the process of executing the mode locking action.
Preferably, a second preset position and a first preset position of the movable template are set by taking the position of the static template as a reference position, and the distances from the second preset position and the first preset position to the static template are respectively S1 and S2; and S2> S1.
Preferably, the overshoot position of the collected moving die plate is measured by the position of the static die plate as a reference position, the distance between the overshoot position and the static die plate is S3, and S2> S3> S1.
Preferably, before the pull rod band-type brake is controlled and driven to perform the mode locking action when the movable mould plate is at the overshoot position, the target position of the pull rod band-type brake is calculated according to the collected overshoot position of the movable mould plate.
An apparatus for eliminating overshoot of a mold closing in compression molding of an injection molding machine, comprising:
the control module is used for controlling the movable template to be matched; stopping driving of the movable template when the movable template moves to a first preset position;
the acquisition module is used for acquiring the overshoot position of the movable template after the driving of the movable template is stopped;
the control module is also used for controlling and driving the internal contracting brake to execute the mode locking action when the movable template is positioned at the overshoot position; when the mode locking action is executed, the movable template is pulled by the pull rod to move towards the direction close to the static template;
and in the process of executing the mode locking action, the control module starts the injection action when the movable template moves to the second preset position.
Preferably, the mobile terminal further comprises an editing module, wherein the editing module is used for setting a first preset position and a second preset position by taking the static template as a reference position; the distances from the second preset position and the first preset position to the static template are S1 and S2 respectively; and S2> S1.
Preferably, the device further comprises a position ruler, wherein the position ruler is used for measuring the distance between the overshoot position and the static template; the distance between the overshoot position and the static template is S3; s2> S3> S1.
Preferably, before the control module controls and drives the pull rod band-type brake to execute the mode locking action when the movable mould plate is at the overshoot position, the control module calculates the target position of the pull rod band-type brake according to the acquired overshoot position of the movable mould plate.
The invention has the following beneficial effects:
1. the invention can eliminate the influence on the mold closing precision caused by mold closing overshoot in the compression molding of the injection molding machine, so as to improve the repeated precision and the positioning precision of the mold closing of the template to the mold closing position;
2. the injection action is executed before the movable template and the static template are attached, so that the time of the compression process can be reduced;
3. the gap between the pull rod and the pull rod nut is eliminated in advance, and the response of the injection action is faster;
4. the injection action is executed before the movable mould plate and the static mould plate are attached, so that the air in the mould cavity can be discharged more conveniently, and the product quality can be improved.
Drawings
FIG. 1 is a schematic flow chart of a method for eliminating overshoot of mold clamping in compression molding of an injection molding machine in example 1.
Fig. 2 is a block diagram of an apparatus for eliminating overshoot of mold clamping in compression molding of an injection molding machine in embodiment 2.
Fig. 3 is a schematic view showing the structure of a device for eliminating overshoot of clamping in compression molding of an injection molding machine in the period from the clamping operation, the mold clamping operation to the injection in example 2.
Wherein, 10, moving the template; 20. a static template; 30. a pull rod; 40. a position ruler; 100. a control module; 200. an acquisition module; 300. and an editing module.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
When the injection molding machine is used for compression molding of a product, the mold is generally closed to the bottom directly, during mold closing, the movable mold plate 10 continuously moves until the movable mold plate is attached to the fixed mold plate 20, the driving of the movable mold plate 10 is stopped, and then the pull rod 30 is started to carry out the mold locking action.
In the mold closing process, when the movable mold plate 10 is stopped to be driven, the movable mold plate 10 still has kinetic energy due to the inertia of the movable mold plate 10, the movable mold plate 10 is stopped to be driven when the movable mold plate 10 is attached to the fixed mold plate 20, the kinetic energy of the movable mold plate 10 is inevitably applied to the fixed mold plate 20 and generates a certain overshoot, the overshoot of the movable mold plate 10 affects the mold closing precision, the repeated precision of mold closing is greatly damaged along with the accumulation of mold closing times, and the mold closing positioning precision is also greatly damaged.
Referring to fig. 1-3, the present invention discloses a method and a device for eliminating overshoot of mold clamping in compression molding of an injection molding machine.
A method for eliminating overshoot of compression molding closing of an injection molding machine discloses a process from closing to locking of the injection molding machine, closing of the mold is ended in advance, locking of the mold is started, and a movable mold plate 10 is prevented from overshooting and acting on a fixed mold plate 20, and the method comprises the following specific steps:
controlling the movable mould plate 10 to close the mould; when the movable die plate 10 moves to the first preset position, stopping driving the movable die plate 10;
acquiring an overshoot position of the movable die plate 10 after the driving of the movable die plate 10 is stopped;
when the movable mould plate 10 is in the overshoot position, the pull rod 30 is controlled and driven to brake so as to execute the mould locking action; when the mold locking operation is performed, the movable mold plate 10 is pulled by the pull rod 30 to move in a direction close to the stationary mold plate 20 until the two are attached to each other.
Specifically, when the injection molding machine is used for closing the mold, the movable mold plate 10 stops driving the mold plate 10 at the first preset position when a certain distance is left from the fixed mold plate 20, because of inertia, the movable mold plate 10 still moves towards the direction of the fixed mold plate 20, and stops completely after moving for a certain distance, at this time, the position of the movable mold plate 10 is an overshoot position, and the overshoot position is located between the first preset position and the fixed mold plate 20.
And after the movable mould plate 10 stops at the overshoot position, acquiring the overshoot position, and driving the pull rod 30 according to the acquired overshoot position, so that the pull rod 30 is braked and locked until the movable mould plate 10 is attached to the static mould plate 20.
In performing the mold locking action, the injection action is initiated when the movable mold plate 10 is moved to the second preset position.
The second preset position is between the static mold plate 20 and the overshoot position, a small gap exists between the second preset position and the static mold plate 20, when the movable mold plate 10 moves to the second preset position, the injection action is executed, that is, the movable mold plate 10 and the static mold plate 20 are not completely closed, the injection action is executed before the movable mold plate 10 and the static mold plate 20 are not completely closed, the requirement on mold locking force can be reduced, and the mutual stress before the movable mold plate 10 and the static mold plate 20 can also be reduced.
The second preset position and the first preset position of the movable template 10 are set by taking the position of the static template 20 as reference positions, and the distances from the second preset position and the first preset position to the static template 20 are respectively S1 and S2; and S2> S1.
Specifically, the position of the stationary platen 20 is used as a reference, and the first preset position and the second preset position are quantized, so that the stopping control of the mold closing action and the starting control of the injection action are facilitated.
The overshoot position of the movable die plate 10 is measured by taking the position of the fixed die plate 20 as a reference position, the distance between the overshoot position and the fixed die plate 20 is S3, and S2> S3> S1.
In order to conveniently acquire the overshoot position of the movable template 10, a stationary object is used as a reference position, and the overshoot position is determined by quantifying the distance between the overshoot position and the reference position.
In the present embodiment, the overshoot position is determined by taking the stationary platen 20 as a reference position.
And before the pull rod 30 is controlled and driven to carry out the mode locking action when the movable mould plate 10 is at the overshoot position, calculating the target position of the pull rod 30 according to the collected overshoot position of the movable mould plate 10.
Specifically, the movable die plate 10 stops at the overshoot position, after the overshoot position is acquired, the target position of the band-type brake of the pull rod 30 is determined according to the overshoot position, the pull rod 30 is driven to execute the band-type brake action at the overshoot position according to the target position, and the die plate 10 is driven to move towards the direction of the fixed die plate 20.
The movable die plate 10 is continuously moved, and the mold locking is continuously performed when the movable die plate 10 is closed in contact with the stationary die plate 20.
Example 2
An apparatus for eliminating overshoot of compression molding clamping of an injection molding machine, which executes a method for eliminating overshoot of compression molding clamping of the injection molding machine, the apparatus specifically comprises:
the control module 100 is used for controlling the movable mould plate 10 to mould; when the movable die plate 10 moves to the first preset position, stopping driving the movable die plate 10;
the control module 100 may be specifically a PLC, and the PLC may control driving of the movable die plate 10.
The acquisition module 200 is configured to acquire the overshoot position of the moving die plate 10 after the driving of the moving die plate 10 is stopped.
The acquisition module 200 is specifically configured to acquire the position of the movable platen 10, and after the movable platen 10 stops the mold closing operation, the movable platen moves for a certain distance due to inertia and stops, and the position where the movable platen 10 stops is the overshoot position.
The control module 100 is further configured to control and drive the band-type brake of the pull rod 30 when the movable mold plate 10 is in the overshoot position to perform a mold locking action;
the control module 100 calculates a target position of the pull rod 30 according to the overshoot position, and the control module 100 controls and drives the pull rod 30 to the target position contracting brake, so as to drive the movable template 10 to move to the position of the static template 20 to execute a mode locking action, so that the movable template 10 is attached to the static template 20.
When the mold locking operation is performed, the movable mold plate 10 is pulled by the pull rod 30 to move in a direction close to the stationary mold plate 20 until the two are attached to each other.
During the mold locking action, the control module 100 initiates an injection action when the movable mold plate 10 moves to the second predetermined position.
The common injection molding machine carries out contracting brake mold locking after the movable mold plate 10 and the static mold plate 20 are closed, then carries out injection compression, has response time because a gap is formed between a contracting brake nut and the pull rod 30 during contracting brake, the mold locking can be realized only when the pull rod 30 moves to overcome the gap, a certain time is required for the pull rod 30 to move to overcome the gap, and the time is response time,
when the injection is started, the pull rod 30 continuously pulls the movable mold plate 10 to move towards the static mold plate 20, so that no response time exists, the gap between the pull rod 30 and the pull rod 30 nut is overcome (when the movable mold plate 10 is at the process position, the pull rod 30 is in band-type brake and the mode locking execution action is overcome), and therefore, the device provided by the application has shorter compression injection time.
When the movable template 10 and the static template 20 are not completely attached, the injection is performed, so that the air in the cavity of the mold can be discharged, and the quality of a product can be improved; in this embodiment, the gap between the second preset position and the static mold plate 20 is very small, and during the injection operation of the injection molding machine, the movable mold plate 10 and the static mold plate 20 need to be attached before the mold cavity is filled.
The device further comprises an editing module 300, wherein the editing module 300 is used for setting a first preset position and a second preset position by taking the static template 20 as a reference position; the distances from the second preset position and the first preset position to the static template 20 are S1 and S2 respectively; and S2> S1.
The device further comprises a position ruler 40, the position ruler 40 is used for measuring the distance between the overshoot position and the static template 20; the distance between the overshoot position and the stationary platen 20 is S3; s2> S3> S1.
The invention can eliminate the influence on the mold closing precision caused by mold closing overshoot in the compression molding of the injection molding machine, so as to improve the repeated precision and the positioning precision of the mold closing of the template to the mold closing position, execute the injection action before the movable template 10 and the static template 20 are jointed, and reduce the time of the compression process.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A method for eliminating the influence of mold closing overshoot of compression molding of an injection molding machine on mold closing precision is characterized by comprising the following steps:
controlling the movable template to be matched; stopping driving of the movable template when the movable template moves to a first preset position;
acquiring an overshoot position of the movable template after the driving of the movable template is stopped;
when the movable mould plate is positioned at the overshoot position, the pull rod internal contracting brake is controlled and driven to execute the mould locking action; when the mold locking action is executed, the movable mold plate is pulled by the pull rod to move towards the direction close to the static mold plate;
and starting the injection action when the movable mould plate moves to the second preset position in the process of executing the mode locking action.
2. The method for eliminating the overshoot of the mold closing in the compression molding of the injection molding machine which affects the mold closing accuracy of the injection molding machine as claimed in claim 1, wherein the second preset position and the first preset position of the movable mold plate are set by the position of the stationary mold plate as reference positions, and the distances from the second preset position and the first preset position to the stationary mold plate are respectively S1 and S2; and S2> S1.
3. The method for eliminating the overshoot of the mold closing of the compression molding machine to influence the mold closing precision of the injection molding machine as claimed in claim 2, wherein the overshoot position of the movable mold plate is acquired and measured by taking the position of the fixed mold plate as a reference position, the distance between the overshoot position and the fixed mold plate is S3, and S2> S3> S1.
4. The method for eliminating the overshoot of the compression molding die closing of the injection molding machine to influence the die closing accuracy according to claim 1, wherein the target position of the draw bar brake is calculated according to the acquired overshoot position of the movable die plate before the draw bar brake is controlled and driven to perform the die locking action when the movable die plate is at the overshoot position.
5. A device for eliminating the overshoot of the compression molding mold closing of an injection molding machine to influence the mold closing precision is characterized by comprising the following components:
the control module is used for controlling the movable template to be matched; stopping driving of the movable template when the movable template moves to a first preset position;
the acquisition module is used for acquiring the overshoot position of the movable template after the driving of the movable template is stopped;
the control module is also used for controlling and driving the internal contracting brake to execute the mode locking action when the movable template is positioned at the overshoot position; when the mode locking action is executed, the movable template is pulled by the pull rod to move towards the direction close to the static template;
and in the process of executing the mode locking action, the control module starts the injection action when the movable template moves to the second preset position.
6. The device for eliminating the influence on the mold closing precision caused by the mold closing overshoot of the compression molding machine of the injection molding machine is characterized by further comprising an editing module, wherein the editing module is used for setting a first preset position and a second preset position by taking the static mold plate as a reference position; the distances from the second preset position and the first preset position to the static template are S1 and S2 respectively; and S2> S1.
7. The apparatus as claimed in claim 6, further comprising a position ruler for measuring the distance between the overshoot position and the stationary platen; the distance between the overshoot position and the static template is S3; s2> S3> S1.
8. The apparatus of claim 5, wherein the control module calculates the target position of the draw bar brake according to the overshoot position of the movable platen before controlling and driving the draw bar brake to perform the mold locking when the movable platen is in the overshoot position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010378968.3A CN111660518B (en) | 2020-05-07 | 2020-05-07 | Method and device for eliminating overshoot of compression molding die assembly of injection molding machine |
| PCT/CN2021/086648 WO2021223575A1 (en) | 2020-05-07 | 2021-04-12 | Method and apparatus for eliminating influence on mold closing precision in case of mold closing overshoot during compression molding of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010378968.3A CN111660518B (en) | 2020-05-07 | 2020-05-07 | Method and device for eliminating overshoot of compression molding die assembly of injection molding machine |
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| Publication Number | Publication Date |
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| CN111660518A CN111660518A (en) | 2020-09-15 |
| CN111660518B true CN111660518B (en) | 2022-05-17 |
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| CN202010378968.3A Active CN111660518B (en) | 2020-05-07 | 2020-05-07 | Method and device for eliminating overshoot of compression molding die assembly of injection molding machine |
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| Country | Link |
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| CN (1) | CN111660518B (en) |
| WO (1) | WO2021223575A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111660518B (en) * | 2020-05-07 | 2022-05-17 | 海天塑机集团有限公司 | Method and device for eliminating overshoot of compression molding die assembly of injection molding machine |
| CN112428538B (en) * | 2020-09-23 | 2023-09-26 | 柳州开宇塑胶机械有限公司 | Two-plate type injection molding machine, control method of primary band-type brake of two-plate type injection molding machine and storage device |
| JP7415884B2 (en) * | 2020-11-12 | 2024-01-17 | トヨタ自動車株式会社 | Casting equipment and casting method |
| CN115320047B (en) * | 2022-07-18 | 2025-03-18 | 海天塑机集团有限公司 | A tie rod failure early warning method for injection molding machines |
| CN116749464A (en) * | 2023-07-20 | 2023-09-15 | 佛山市宝塑精密机械有限公司 | A control method, device, equipment and medium for the first brake of an injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014471A (en) * | 2003-06-27 | 2005-01-20 | Toshiba Mach Co Ltd | Injection press molding method |
| CN110142939A (en) * | 2019-07-02 | 2019-08-20 | 宁波力松注塑科技有限公司 | A high-precision and high-efficiency injection molding machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1013032B (en) * | 1986-08-09 | 1991-07-03 | 东芝机械株式会社 | Method and apparatus for controlling a vehicle having a movable part and a stationary part |
| US7501083B2 (en) * | 2003-10-06 | 2009-03-10 | Sumitomo Heavy Industries, Ltd. | Injection molding machine and injection molding method |
| CN101398672B (en) * | 2007-09-26 | 2010-09-15 | 中国科学院自动化研究所 | A Learning Method for Improving Positioning Accuracy of Mold Opening and Closing Mechanism |
| CN202607995U (en) * | 2011-12-23 | 2012-12-19 | 东莞富强鑫塑胶机械制造有限公司 | A low-pressure mold closing control device for an injection molding machine |
| CN104441515B (en) * | 2014-12-26 | 2017-03-15 | 中国计量大学 | Closing method is opened based on two-plate injection machine matched molds apparatus |
| CN108215106B (en) * | 2018-03-22 | 2020-03-06 | 宁波弘讯科技股份有限公司 | Oil cylinder overshoot control method and injection mold |
| CN108638466B (en) * | 2018-04-25 | 2020-03-31 | 广州市香港科大霍英东研究院 | Mold opening and closing control method, system and device for injection molding control system |
| CN111660518B (en) * | 2020-05-07 | 2022-05-17 | 海天塑机集团有限公司 | Method and device for eliminating overshoot of compression molding die assembly of injection molding machine |
-
2020
- 2020-05-07 CN CN202010378968.3A patent/CN111660518B/en active Active
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2021
- 2021-04-12 WO PCT/CN2021/086648 patent/WO2021223575A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005014471A (en) * | 2003-06-27 | 2005-01-20 | Toshiba Mach Co Ltd | Injection press molding method |
| CN110142939A (en) * | 2019-07-02 | 2019-08-20 | 宁波力松注塑科技有限公司 | A high-precision and high-efficiency injection molding machine |
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| CN111660518A (en) | 2020-09-15 |
| WO2021223575A1 (en) | 2021-11-11 |
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