CN112721059A - Injection mold and control method of injection system - Google Patents
Injection mold and control method of injection system Download PDFInfo
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- CN112721059A CN112721059A CN202110102566.5A CN202110102566A CN112721059A CN 112721059 A CN112721059 A CN 112721059A CN 202110102566 A CN202110102566 A CN 202110102566A CN 112721059 A CN112721059 A CN 112721059A
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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
- B29C45/26—Moulds
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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
- B29C45/80—Measuring, controlling or regulating of relative position of mould parts
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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
- 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
- B29C2945/76732—Mould
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an injection mold which comprises a fixed mold plate and a movable mold plate, wherein a fixed mold core is arranged on the fixed mold plate, a movable mold core is arranged on the movable mold plate, a mold cavity is formed by locking the fixed mold core and the movable mold core, and at least one displacement sensor is arranged on the fixed mold core and used for acquiring a gap between a parting surface of the fixed mold core and a parting surface of the movable mold core. According to the invention, the gap between the fixed mold core parting surface and the movable mold core parting surface is obtained through the displacement sensor, so that the gap of the parting surface is adjusted to meet the requirement of injection molding process parameters, the quality of a plastic product is improved, the phenomenon that the gap of the parting surface is too large, plastic hot fluid overflows from the gap between the fixed mold core parting surface and the movable mold core parting surface to cause the plastic product to generate flash, or the gap of the parting surface is too small, so that gas in a mold cavity cannot be rapidly discharged, and the plastic product is burnt or partially lacks materials is avoided. The invention also discloses a control method of the injection molding system.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to an injection mold and a control method of an injection system.
Background
The injection molding is to send the granular or powdery fiber-resin mixture into a charging barrel, heat and melt the mixture, pressurize the mixture by a plunger or a screw, inject the mixture into a closed injection mold with lower temperature through a nozzle, and obtain a plastic product after cooling and shaping and demolding, wherein the injection mold influences the quality of the plastic product and the stability of the production process, and the injection molding process influences the service life of the injection mold.
In the injection molding process, because the injection mold is influenced by various external factors, the injection molding product is distorted, particularly the parting surface between the fixed mold group and the movable mold group, namely the contact surface of the fixed mold group and the movable mold group which are matched with each other when the injection mold is closed, if the gap between the parting surfaces of the fixed mold group and the movable mold group is too large, after plastic hot fluid enters the mold cavity, the plastic hot fluid overflows from the gap between the fixed mold plate and the movable mold plate to generate flash, the quality of the cooled and shaped plastic product is reduced, and if the gap between the parting surfaces of the fixed mold plate and the movable mold plate is too small, gas in the mold cavity can not be quickly removed, so that the phenomenon that the plastic product is burnt or lack of materials is caused. In the production process of injection molding products, the parting surface assembly clearance is a constant value before injection molding, and the value is within a normal value range, but in the injection molding process, due to the influence of various complex factors, the clearance of the parting surface can be dynamically changed, so that the parting surface assembly clearance value exceeds the normal value, the quality of the plastic products is reduced, and even the service life of an injection mold is influenced.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an injection mold so as to realize the purpose of detecting the gap between the mold core parting surface and the movable mold core parting surface in real time by a displacement sensor.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides an injection mold, includes fixed die plate and movable mould board, installs the cover half benevolence on the fixed die plate, installs movable mould benevolence on the movable mould board, constitutes the die cavity behind cover half benevolence and the movable mould benevolence mode locking, installs a displacement sensor on the cover half benevolence at least for acquire the clearance between cover half benevolence and the movable mould benevolence die joint.
Furthermore, a first groove is formed in the fixed die core, a second groove is formed in the movable die core, and the first groove and the second groove enclose a die cavity;
and a displacement sensor is arranged in the first groove and/or on the periphery of the opening of the first groove, and the detection end of the displacement sensor is arranged between the fixed die core and the movable die core.
Furthermore, the periphery side of the opening of the first groove is provided with a first mounting groove which protrudes towards the inside of the fixed mold core and is opened towards the movable mold core, a support frame is embedded in the first mounting groove, the bottom of the first mounting groove and the support frame are provided with coaxial through holes, the detection end of the displacement sensor is embedded in the through hole of the support frame, and the signal end of the displacement sensor penetrates out of the through hole at the bottom of the first mounting groove.
Further, set up on the movable mould benevolence to the inside convex of movable mould benevolence, towards the open-ended second mounting groove of cover half benevolence, the support frame includes fixed part and protruding portion, in the first mounting groove of fixed part embedding, in the protruding portion embedding second mounting groove.
Furthermore, a boss extending towards the axial direction of the movable mold core is arranged at the bottom of the first groove, coaxial through holes are formed in the bottom of the first groove and the boss, the detection end of the displacement sensor is embedded into the through hole of the boss, and the signal end of the displacement sensor penetrates out of the through hole in the bottom of the first groove.
The invention further aims to provide a control method of an injection molding system, so as to achieve the purpose of controlling the gap between the die joint surface of the fixed die set and the die joint surface of the movable die set to meet the requirement of injection molding process parameters.
A control method of an injection molding system, the injection molding system comprises an injection mold, a mold locking device and a control device, the injection mold is provided with a displacement sensor, and the method comprises the following steps:
s1, acquiring a mold closing distance of a corresponding position of each sensor during no-load mold closing;
s2, applying a mold locking force to the movable mold unit in the injection molding process to lock the mold, and acquiring the real-time distance of the corresponding position of any displacement sensor;
s3, obtaining the change value of the real-time space of the plurality of displacement sensors relative to the mold closing space, wherein,
comparing any obtained change value with a preset interval change threshold value; or comparing the difference between any two change values at the same time with a preset difference;
and S4, adjusting the clamping force applied to the movable module according to the comparison result.
Further, in step S3, if any of the obtained change values is greater than the maximum value of the preset distance change threshold, increasing the mold locking force applied to the movable mold assembly, and re-executing step S1;
if any obtained change value is smaller than or equal to the minimum value of the preset distance change threshold value, reducing the mold locking force applied to the movable mold group, and executing the step S1 again;
and if any obtained change value is smaller than or equal to the maximum value of the preset interval change threshold value and larger than the minimum value of the preset interval change threshold value, the current mold locking force value meets the parameter requirement of the injection molding process.
Further, in step S3, if any of the obtained change values is smaller than the maximum value of the preset distance change threshold and larger than the minimum value of the preset distance change threshold, the mold locking force applied to the movable mold assembly is reduced, step S1 is executed again until the change value is equal to the maximum value of the preset distance change threshold, and the current mold locking force value is determined to be the optimal value.
Further, in step S3, if the difference between any two of the variation values at the same time is less than or equal to the preset maximum difference value and greater than the preset minimum difference value, the parting surface of the front fixed mold set and the parting surface of the movable mold set are in a balanced state;
if the difference between any two of the variation values at the same time is greater than or equal to the maximum value of the preset difference or smaller than the minimum value of the preset difference, the mold locking forces applied to different positions of the movable mold assembly are adjusted, and step S1 is executed again.
Further, step S4 further includes: if the mold locking force applied to the movable mold assembly is not less than the maximum value of the preset mold locking force range, the balance of the mold surface of the fixed mold assembly and/or the mold surface of the movable mold assembly is adjusted, and step S1 is executed again.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, the gap between the fixed mold core parting surface and the movable mold core parting surface is obtained through the displacement sensor, so that the gap of the parting surface is adjusted to meet the requirement of injection molding process parameters, the quality of a plastic product is improved, the phenomenon that the gap of the parting surface is too large, plastic hot fluid overflows from the gap between the fixed mold core parting surface and the movable mold core parting surface to cause the plastic product to generate flash, or the gap of the parting surface is too small, so that gas in a mold cavity cannot be rapidly discharged, and the plastic product is burnt or partially lacks materials is avoided.
2. According to the invention, the real-time gap data curve between the fixed mold core parting surface and the movable mold core parting surface is formed by collecting the gap change of the fixed mold core parting surface and the movable mold core parting surface, so that an operator of the injection mold can conveniently master the use condition of the injection mold and adjust the injection molding process parameters in time, thereby improving the quality of plastic products and maintaining and repairing the injection mold in time.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic structural view of an injection mold in an embodiment of the present invention;
FIG. 2 is an exploded view of an injection mold in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the fixed mold core and the movable mold core in a non-mold-closed state according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a stationary mold core in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a support stand according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a support bracket of yet another angle in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram illustrating a closed state of the stationary mold core and the movable mold core according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
FIG. 9 is a schematic flow chart of an injection molding system control method in an embodiment of the present invention;
FIG. 10 is a logic diagram of an injection molding system control method in an embodiment of the present invention;
FIG. 11 is yet another logical schematic of an injection molding system control method in an embodiment of the present invention.
In the figure: 1. fixing a module; 11. fixing a template; 12. fixing a mold core; 121. a first groove; 122. a first mounting groove; 123. a boss; 13. a fixed die base plate; 2. a movable module; 21. moving the template; 22. a movable mould core; 221. a second groove; 222. a second mounting groove; 3. a displacement sensor; 31. a detection end; 32. a transmission end; 4. a support frame; 41. a fixed part; 42. a protrusion; 5. a compression nut; 6. a locknut; 7. and (4) screws.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
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 will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 to 8, an embodiment of the present invention provides an injection mold, which includes a fixed mold plate 11 and a movable mold plate 21, wherein the fixed mold plate 11 is provided with a fixed mold core 12, the movable mold plate 21 is provided with a movable mold core 22, the fixed mold core 12 and the movable mold core 22 are locked to form a mold cavity, and the fixed mold core 12 is provided with at least one displacement sensor 3 for detecting a gap between a parting surface of the fixed mold core 12 and a parting surface of the movable mold core 22.
In this embodiment, acquire the clearance of die joint through displacement sensor 3, and then the clearance of adjustment die joint is in order to satisfy the technological parameter requirement of moulding plastics, and the clearance of avoiding the die joint is too big, leads to the plastics hot-fluid to spill over from the clearance of the die joint of cover half benevolence 12 and movable mould benevolence 22, and the phenomenon of overlap appears in the plastic products, or the clearance undersize of die joint leads to the gas in the die cavity to get rid of fast, and the phenomenon of scorching or scarce material appears in the plastic products.
As shown in fig. 1 and 2, in the present embodiment, the fixed mold core 12 and the movable mold core 22 are coaxially disposed, the displacement sensor 3 is axially disposed along the fixed mold core 12, and a gap is formed between a detection end 31 of the displacement sensor 3 and a position corresponding to a parting surface of the movable mold core 22.
As shown in fig. 1 and fig. 2, in the present embodiment, a fixed mold base plate 13 is disposed on one side of the fixed mold plate 11 away from the movable mold plate 21, the fixed mold base plate 13 is attached to the fixed mold plate 11, and the fixed mold base plate 13, the fixed mold plate 11 and the fixed mold core 12 are sequentially disposed to form a fixed mold set 1; the side of the movable mold core 22 away from the fixed mold core 12 is provided with a movable mold plate 21 to form a movable mold set 2.
As shown in fig. 3 and 4, in the present embodiment, the fixed mold core 12 is provided with a first groove 121, the movable mold core 22 is provided with a second groove 221, and the first groove 121 and the second groove 221 surround a mold cavity; the displacement sensor 3 is arranged in the first groove 121 and/or on the periphery of the opening of the first groove 121, and the detection end 31 of the displacement sensor 3 is arranged between the fixed mold core 12 and the movable mold core 22, so that the real-time gap between the parting surfaces of the fixed mold core 12 and the movable mold core 22 can be detected more accurately.
As shown in fig. 3 and 4, in the embodiment, the first groove 121 protrudes toward the inside of the fixed mold core 12 and opens toward the movable mold core 22, the second groove 221 protrudes toward the outside of the movable mold core 22 and opens toward the fixed mold core 12, the outer peripheral wall of the second groove 221 is attached to the inner peripheral wall of the first groove 121, and the first groove 121 and the second groove 221 surround a mold cavity.
As shown in fig. 3 and 4, in the present embodiment, at least one displacement sensor 3 is installed inside the first groove 121, and is used for determining whether the real-time gap between the parting surface of the die set 1 and the parting surface of the movable die set 2 is within a normal range meeting the requirements of the injection molding process parameters; a plurality of displacement sensors 3 are symmetrically arranged on the peripheral side of the opening of the first groove 121, so that whether the gap between the die set 1 and the die set 2 meets the requirement of injection molding process parameters or not can be judged, and whether the die sets 1 and the die set 2 are in a balanced state or not can be judged.
As shown in fig. 5 to 8, in the embodiment, the first mounting groove 122 protruding toward the inner portion of the core 12 and opening toward the core 22 is formed on the outer peripheral side of the opening of the first groove 121, the supporting frame 4 is embedded in the first mounting groove 122, the bottom of the first mounting groove 122 and the supporting frame 4 have coaxial through holes, the detecting end 31 of the displacement sensor 3 is embedded in the through hole of the supporting frame 4, and the signal end of the displacement sensor 3 penetrates out of the through hole at the bottom of the first mounting groove 122.
As shown in fig. 5 to 8, in the present embodiment, the moving core 22 is provided with a second mounting groove 222 protruding toward the inner portion of the moving core 22 and opening toward the core 12, the supporting frame 4 includes a fixing portion 41 and a protruding portion 42, the fixing portion 41 is embedded in the first mounting groove 122, and the protruding portion 42 is embedded in the second mounting groove 222.
As shown in fig. 5 and 6, in the present embodiment, the axis of the supporting frame 4 is arranged in the same direction as the axis of the fixed mold core 12; preferably, the supporting frame 4 is a cylindrical supporting frame, the first mounting groove 122 and the second mounting groove 222 are arranged in the same direction and are cylindrical grooves matched with each other, the detection end 31 of the displacement sensor 3 is embedded into the supporting frame 4, the transmission end 32 of the displacement sensor 3 penetrates out of the supporting frame 4, and a real-time gap between the parting surfaces of the fixed mold core 12 and the movable mold core 22 is transmitted to the control device to judge whether the gap between the parting surface of the module 1 and the parting surface of the movable mold core 2 is within a normal range meeting the parameter requirements of the injection molding process, and meanwhile, the supporting frame 4 is a cylindrical supporting frame which can effectively prevent the influence of flash on the displacement sensor 3.
As shown in fig. 4, 7 and 8, in this embodiment, the fixed mold core 12 is provided with a first groove 121, the bottom of the first groove 121 is provided with a boss 123 extending axially toward the movable mold core 22, the bottom of the first groove 121 and the boss 123 are provided with coaxial through holes, the detection end 31 of the displacement sensor 3 is embedded in the through hole of the boss 123, and the signal end of the displacement sensor 3 penetrates out of the through hole at the bottom of the first groove 121.
As shown in fig. 4, 7 and 8, in the present embodiment, the axis of the boss 123 is disposed in the same direction as the axis of the fixed mold core 12, and the extended end portion of the boss 123 and the parting surface of the fixed mold core 12 are located at the same horizontal plane or inside the first groove 121.
As shown in fig. 4, 7 and 8, in this embodiment, the boss 123 is a cylindrical boss, an axis of the cylindrical boss coincides with a center line of a through hole formed in the cylindrical boss, and the through hole is a step-shaped circular hole, the detection end 31 of the displacement sensor 3 is embedded in the through hole, and the transmission end 32 of the displacement sensor 3 penetrates out of the through hole of the boss 123, so as to transmit real-time displacement between the parting surfaces of the fixed mold core 12 and the movable mold core 22 to the control device, so as to determine whether a real-time gap between the parting surface of the fixed mold assembly 1 and the parting surface of the movable mold assembly 2 is within a normal range meeting the parameter requirements of the injection molding process, and meanwhile, the boss 123 is a cylindrical boss, which can effectively prevent the displacement sensor 3 from.
Specifically, a first groove 121 is formed in the fixed die core 12, first mounting grooves 122 are symmetrically formed in four corners of the outer periphery of the first groove 121, a second mounting groove 222 is formed in a corresponding position of the movable die core 22, coaxial through holes are formed in the bottom of the first mounting groove 122 and the support frame 4, the displacement sensor 3 sequentially penetrates through the bottom of the first mounting groove 122 and the through holes of the support frame 4, the displacement sensor 3 is provided with external threads, two ends of the external threads are respectively fastened with the fixed die plate 11 and the support frame 4 through the locknut 6, the outer periphery of the support frame 4 is fixed with the fixed die plate 11 through the screw 7, the detection end 31 of the displacement sensor 3 is located inside the support frame 4, the support frame 4 is embedded into the second mounting groove 222, and; the bottom of the first groove 121 and the boss 123 are provided with coaxial through holes, the through hole at the bottom of the first groove 121 is a stepped hole, the displacement sensor 3 sequentially penetrates through the through holes at the bottom of the first groove 121 and the boss 123, the locknut 6 is screwed into the stepped hole at the bottom of the first groove 121 and is fixedly connected with the external thread of the displacement sensor 3, and then the compression nut 5 is screwed into the stepped hole of the fixed mold core 12 and compresses the locknut 6.
Through above-mentioned injection mold, acquire through displacement sensor 3 and be used for acquireing the clearance between 12 die joints of die core and the 22 die joints of movable mould benevolence, and then acquire the real-time clearance between 1 die joint of the fixed mould group and the 2 die joints of movable mould group, judge whether the clearance of die joint accords with injection moulding process parameter requirement to prevent that the too big overlap that appears that leads to final plastic products in clearance, perhaps clearance undersize leads to final plastic products to appear scorching or lack the material, reduce product quality.
Example two
As shown in fig. 9 to 11, an embodiment of the present invention provides a control method for an injection molding system, where the injection molding system includes an injection mold, a mold locking device, and a control device, the injection mold is provided with a displacement sensor 3, and the method includes:
s1, acquiring a mold closing distance of a corresponding position of each sensor during no-load mold closing, namely S1, S2 and … … Sn;
s2, applying a mold locking force to the movable mold set 2 to lock the mold during injection molding, and acquiring real-time distances of corresponding positions of any displacement sensor 3, namely S1 ', S2 ' and … … Sn ';
s3, obtaining the change value of the real-time space of the plurality of displacement sensors 3 relative to the mold clamping space, wherein,
comparing any obtained change value with a preset interval change threshold value; or comparing the difference between any two change values at the same time with a preset difference;
s4, the clamping force applied to the movable die set 2 is adjusted based on the comparison result.
In this embodiment, the change value of the relative compound die interval of real-time interval of displacement sensor 3 is the real-time clearance between 1 die joint of fixed mould group and the 2 die joints of movable mould group, predetermines interval change threshold value and is the reasonable clearance scope between 1 die joint of fixed mould group and the 2 die joints of movable mould group.
As shown in fig. 9 and 10, in this embodiment, in step S3, if any of the obtained change values is greater than the maximum value of the preset pitch change threshold, the mold locking force applied to the movable mold assembly 2 is increased, and step S1 is executed again; the real-time clearance between the die joint of the fixed die set 1 and the die joint of the movable die set 2 is larger than the reasonable clearance range, so that plastic hot fluid easily overflows from the clearance between the die joint of the fixed die core 12 and the die joint of the movable die core 22, and the plastic product generates flash.
As shown in fig. 9 and 10, in this embodiment, in step S3, if any of the obtained change values is less than or equal to the minimum value of the preset pitch change threshold, the mold locking force applied to the movable mold assembly 2 is reduced, and step S1 is executed again; the real-time clearance between the die joint of the fixed die set 1 and the die joint of the movable die set 2 is smaller than a reasonable clearance range, and gas in the die cavity can not be quickly discharged, so that plastic products are burnt or partially lack of materials.
As shown in fig. 9 and 10, in this embodiment, in step S3, if any of the obtained variation values is smaller than or equal to the maximum value of the preset distance variation threshold and larger than the minimum value of the preset distance variation threshold, the current clamping force value meets the requirement of the injection molding process parameter.
As shown in fig. 9 and 10, in this embodiment, in step S3, if any of the obtained change values is smaller than the maximum value of the preset distance change threshold and larger than the minimum value of the preset distance change threshold, the mold locking force applied to the movable mold set 2 is reduced, step S1 is executed again until the change value is equal to the maximum value of the preset distance change threshold, and the current mold locking force value is determined to be the optimal value.
In this embodiment, when the variation value is within the preset distance difference range, the smaller the mold clamping force is, the lower the rigidity required by the system is, and the service life of the injection mold can be further prolonged.
As shown in fig. 9 and 11, in this embodiment, in step S3, if the difference between any two of the variation values at the same time is less than or equal to the preset maximum difference value and greater than the preset minimum difference value, the parting surface of the front fixed mold assembly 1 and the parting surface of the movable mold assembly 2 are in a balanced state; if the difference between any two of the variation values at the same time is greater than or equal to the maximum value of the preset difference or smaller than the minimum value of the preset difference, the mold locking forces applied to different positions of the movable mold unit 2 are adjusted, and step S1 is executed again.
As shown in fig. 9 and 11, in the present embodiment, step S3 further includes: if the mold locking force applied to the movable mold group 2 is larger than or equal to the maximum value of the preset mold locking force range, the balance degree of the parting surface of the fixed mold group 1 and/or the parting surface of the movable mold group 2 is adjusted, and the step S1 is executed again, so that the real-time gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 is in a reasonable gap range, operators of the injection mold can conveniently master the use condition of the injection mold, and the mold can be maintained and repaired in time.
In the present embodiment, during the mold clamping operation, the control device receives real-time displacement data between the parting surfaces transmitted from the displacement sensors 3, and stores the mold clamping force in association with the value of change between the parting surfaces acquired by each displacement sensor 3.
In this embodiment, the mold clamping force and the variation value between the parting surfaces acquired by each displacement sensor 3 are stored in association with the cloud server to form a database. Before the mold locking operation is executed, the reasonable mold locking pressure is obtained through a database so as to ensure that the variation value between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 meets the reasonable gap range of the parameter requirement of the injection molding process.
In this embodiment, through gathering the real-time clearance between the 1 die joint of fixed mould group and the 2 die joints of movable mould group, and then form the dynamic clearance data curve between 1 die joint of fixed mould group and the 2 die joints of movable mould group, make things convenient for injection mold's operating personnel to master injection mold in service behavior, in time adjust the technological parameter of moulding plastics to improve and mould a quality, and in time maintain and maintain the mould.
Through the comparison of the change value and the preset interval change threshold value, the real-time gap and the reasonable gap range between the die joint of the die set 1 and the die joint of the movable die set 2 are judged and compared, the die locking force applied to the movable die set 2 is quickly and accurately adjusted according to the comparison result, and then the gap between the die joint of the fixed die set 1 and the die joint of the movable die set 2 reaches the normal value range required by the injection molding process parameters.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides an injection mold, includes fixed die plate and movable mould board, installs the cover half benevolence on the fixed die plate, installs movable mould benevolence on the movable mould board, constitutes the die cavity behind cover half benevolence and the movable mould benevolence mode locking, its characterized in that installs a displacement sensor on the cover half benevolence at least for obtain the clearance between cover half benevolence die joint and the movable mould benevolence die joint.
2. The injection mold of claim 1, wherein the core insert defines a first recess, the core insert defines a second recess, and the first recess and the second recess define a mold cavity;
and a displacement sensor is arranged in the first groove and/or on the periphery of the opening of the first groove, and the detection end of the displacement sensor is arranged between the fixed die core and the movable die core.
3. An injection mold according to claim 2, wherein a first mounting groove is formed on an outer peripheral side of the opening of the first groove, the first mounting groove protrudes toward the inside of the cavity block and opens toward the cavity block, a support frame is embedded in the first mounting groove, the bottom of the first mounting groove and the support frame have coaxial through holes, the detection end of the displacement sensor is embedded in the through hole of the support frame, and the signal end of the displacement sensor penetrates out of the through hole at the bottom of the first mounting groove.
4. An injection mold according to claim 3, wherein the movable mold core is provided with a second mounting groove protruding toward the inside of the movable mold core and opening toward the fixed mold core, and the support frame comprises a fixing portion and a protrusion portion, the fixing portion is embedded in the first mounting groove, and the protrusion portion is embedded in the second mounting groove.
5. An injection mold according to claim 2, wherein the first groove has a boss extending axially toward the cavity, the first groove has a coaxial through hole at a bottom thereof and the boss has a coaxial through hole, the detecting end of the displacement sensor is inserted into the through hole of the boss, and the signal end of the displacement sensor is extended out of the through hole at the bottom of the first groove.
6. A control method of an injection molding system, the injection molding system comprises an injection mold, a mold locking device and a control device, the injection mold is provided with a displacement sensor, and the method is characterized by comprising the following steps:
s1, acquiring a mold closing distance of a corresponding position of each sensor during no-load mold closing;
s2, applying a mold locking force to the movable mold unit in the injection molding process to lock the mold, and acquiring the real-time distance of the corresponding position of any displacement sensor;
s3, obtaining the change value of the real-time space of the plurality of displacement sensors relative to the mold closing space, wherein,
comparing any obtained change value with a preset interval change threshold value; or comparing the difference between any two change values at the same time with a preset difference;
and S4, adjusting the clamping force applied to the movable module according to the comparison result.
7. The control method of an injection molding system according to claim 6, wherein in step S3, if any of the obtained variation values is larger than a preset pitch variation threshold maximum value, the mold clamping force applied to the movable mold group is increased, and step S1 is executed again;
if any obtained change value is smaller than or equal to the minimum value of the preset distance change threshold value, reducing the mold locking force applied to the movable mold group, and executing the step S1 again;
and if any obtained change value is smaller than or equal to the maximum value of the preset interval change threshold value and larger than the minimum value of the preset interval change threshold value, the current mold locking force value meets the parameter requirement of the injection molding process.
8. The control method of an injection molding system according to claim 7, wherein in step S3, if any of the obtained variation values is smaller than the maximum value of the preset pitch variation threshold and larger than the minimum value of the preset pitch variation threshold, the mold clamping force applied to the movable mold assembly is decreased, and step S1 is executed again until the variation value is equal to the maximum value of the preset pitch variation threshold, and the current mold clamping force value is determined to be the optimum value.
9. The control method of an injection molding system according to claim 6, wherein in step S3, if the difference between any two of the variation values at the same time is less than or equal to a preset maximum difference value and greater than a preset minimum difference value, the front mold set parting plane and the movable mold set parting plane are in a balanced state;
if the difference between any two of the variation values at the same time is greater than or equal to the maximum value of the preset difference or smaller than the minimum value of the preset difference, the mold locking forces applied to different positions of the movable mold assembly are adjusted, and step S1 is executed again.
10. A control method of an injection molding system according to any one of claims 7 to 9, wherein step S4 further includes: if the mold locking force applied to the movable mold assembly is not less than the maximum value of the preset mold locking force range, the balance of the mold surface of the fixed mold assembly and/or the mold surface of the movable mold assembly is adjusted, and step S1 is executed again.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211734A (en) * | 2021-05-25 | 2021-08-06 | 立臻科技(昆山)有限公司 | Injection mold |
| CN113815210A (en) * | 2021-07-29 | 2021-12-21 | 海天塑机集团有限公司 | Injection molding method and system for controlling thickness of thin-wall product |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113211734A (en) * | 2021-05-25 | 2021-08-06 | 立臻科技(昆山)有限公司 | Injection mold |
| CN113815210A (en) * | 2021-07-29 | 2021-12-21 | 海天塑机集团有限公司 | Injection molding method and system for controlling thickness of thin-wall product |
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