Injection mold and injection system control method

Abstract

The present invention discloses an injection mold, including a fixed mold plate and a movable mold plate, wherein a fixed mold core is installed on the fixed mold plate, and a movable mold core is installed on the movable mold plate, and a mold cavity is formed after the fixed mold core and the movable mold core are locked, and at least one displacement sensor is installed on the fixed mold core for obtaining the gap between the parting surface of the fixed mold core and the parting surface of the movable mold core. In the present invention, the gap between the parting surface of the fixed mold core and the parting surface of the movable mold core is obtained by the displacement sensor, and then the gap of the parting surface is adjusted to meet the injection molding process parameter requirements, improve the quality of plastic products, avoid the gap of the parting surface is too large, the plastic hot fluid overflows from the gap between the parting surface of the fixed mold core and the parting surface of the movable mold core, and the plastic product has flash, or the gap of the parting surface is too small, the gas in the mold cavity cannot be quickly discharged, and the plastic product is burned or partially lacks material. The present invention also discloses a control method for an injection molding system.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and in particular to an injection mold and a control method for an injection molding system. Background Art

[0002] Injection molding is the process of feeding granular or powdered fiber-resin mixture into a barrel, heating and melting it, pressurizing it with a plunger or screw, and injecting it through a nozzle into a closed injection mold with a lower temperature. After cooling and shaping, the plastic product is demolded to obtain a plastic product. Among them, the injection mold affects the quality of the plastic product and the stability of the production process, and the injection molding process affects the service life of the injection mold.

[0003] During the injection molding process, the injection mold is affected by various external factors, resulting in deformation of the injection molded product, especially the parting surface between the fixed mold group and the movable mold group, that is, the contact surface between the fixed mold group and the movable mold group 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, the plastic hot fluid will enter the mold cavity and overflow from the gap of the parting surface between the fixed mold plate and the movable mold plate to produce flash, resulting in a decrease in the quality of the plastic product after cooling and finalization. If the gap between the parting surface between the fixed mold plate and the movable mold plate is too small, the gas in the mold cavity cannot be quickly removed, resulting in the phenomenon of burning or lack of material in the plastic product. In the production process of injection molded products, it is found that the assembly gap of the parting surface is a constant value before injection molding, and the value is within the normal value range. However, during the injection molding process, due to the influence of various complex factors, the gap of the parting surface will change dynamically, resulting in the value of the assembly gap of the parting surface exceeding the normal value, reducing the quality of the plastic product and even affecting the service life of the injection mold.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an injection mold to achieve the purpose of using a displacement sensor to detect the gap between the fixed mold core parting surface and the movable mold core parting surface in real time.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] An injection mold comprises a fixed mold plate and a movable mold plate, wherein a fixed mold core is installed on the fixed mold plate, and a movable mold core is installed on the movable mold plate. The fixed mold core and the movable mold core form a mold cavity after being locked. At least one displacement sensor is installed on the fixed mold core for obtaining the gap between the parting surfaces of the fixed mold core and the movable mold core.

[0008] Furthermore, a first groove is formed on the fixed mold core, and a second groove is formed on the movable mold core, and the first groove and the second groove form a mold cavity;

[0009] A displacement sensor is installed inside the first groove and / or on the outer peripheral side of the opening of the first groove, and a detection end of the displacement sensor is placed between the fixed mold core and the movable mold core.

[0010] Furthermore, a first mounting groove is provided on the outer peripheral side of the opening of the first groove, which protrudes toward the interior of the fixed mold core and opens toward 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 have a coaxial through hole. 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 passes through the through hole at the bottom of the first mounting groove.

[0011] Furthermore, a second mounting groove protruding toward the interior of the movable mold core and opening toward the fixed mold core is opened on the movable mold core, and the support frame includes a fixed portion and a protruding portion, the fixed portion is embedded in the first mounting groove, and the protruding portion is embedded in the second mounting groove.

[0012] Furthermore, a boss extending axially toward the movable mold core is provided at the bottom of the first groove, and the bottom of the first groove and the boss have a coaxial through hole. The detection end of the displacement sensor is embedded in the through hole of the boss, and the signal end of the displacement sensor passes through the through hole at the bottom of the first groove.

[0013] Another object of the present invention is to provide a control method for an injection molding system, so as to achieve the purpose of controlling the gap between the molding surface of the fixed mold component and the molding surface of the movable mold component to meet the requirements of the injection molding process parameters.

[0014] A control method for an injection molding system, the injection molding system comprising an injection mold, a clamping device and a control device, a displacement sensor being arranged on the injection mold, the method comprising:

[0015] S1, obtain the mold spacing of each sensor corresponding to the position when the mold is closed without load;

[0016] S2, during injection molding, a clamping force is applied to the movable mold assembly to perform mold clamping, and the real-time spacing of the corresponding position of any displacement sensor is obtained;

[0017] S3, obtaining the change value of the real-time spacing of multiple displacement sensors relative to the mold spacing, wherein:

[0018] Compare any acquired change value with a preset spacing change threshold; or compare the difference between any two change values ​​at the same time with a preset difference;

[0019] S4, adjusting the clamping force applied to the movable mold assembly according to the comparison result.

[0020] Further, in step S3, if any of the obtained change values ​​is greater than the maximum value of the preset spacing change threshold, the clamping force applied to the movable mold assembly is increased, and step S1 is executed again;

[0021] If any of the obtained change values ​​is less than or equal to the preset minimum spacing change threshold, the clamping force applied to the movable die set is reduced, and step S1 is executed again;

[0022] If any of the obtained change values ​​are less than or equal to the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the current clamping force value meets the injection molding process parameter requirements.

[0023] Further, in step S3, if any of the obtained change values ​​are less than the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the clamping force applied to the movable mold group is reduced, and step S1 is re-executed until the change value is equal to the maximum value of the preset spacing change threshold, and the current clamping force value is determined to be the optimal value.

[0024] Further, in step S3, if the difference between any two change values ​​at the same time is less than or equal to the preset maximum difference value and greater than the preset minimum difference value, then the molding surface of the fixed mold assembly and the molding surface of the movable mold assembly are currently in a balanced state;

[0025] If the difference between any two change values ​​at the same time is greater than or equal to the preset maximum difference value or less than the preset minimum difference value, the clamping force applied to different positions of the movable die set is adjusted and step S1 is executed again.

[0026] Further, step S4 also includes: if the clamping force applied to the movable mold assembly is greater than or equal to the maximum value of the preset clamping force range, adjusting the balance of the molding surface of the fixed mold assembly and / or the molding surface of the movable mold assembly, and re-executing step S1.

[0027] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0028] 1. In the present invention, the gap between the fixed mold core parting surface and the movable mold core parting surface is obtained by a displacement sensor, and then the gap of the parting surface is adjusted to meet the injection molding process parameter requirements, improve the quality of plastic products, avoid the gap of the parting surface is too large, the plastic hot fluid overflows from the gap between the fixed mold core parting surface and the movable mold core parting surface, and causes the plastic product to have flash, or the gap of the parting surface is too small, the gas in the mold cavity cannot be quickly discharged, and the plastic product is burned or partially missing.

[0029] 2. In the present invention, by collecting the gap changes between the fixed mold core parting surface and the movable mold core parting surface, a real-time gap data curve between the fixed mold core parting surface and the movable mold core parting surface is formed, which facilitates the injection mold operator to grasp the use of the injection mold and adjust the injection molding process parameters in time, thereby improving the quality of plastic products and timely maintaining and repairing the injection mold.

[0030] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0032] Figure 1 is a schematic structural diagram of an injection mold in an embodiment of the present invention;

[0033] Figure 2 is an exploded view of an injection mold in an embodiment of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the fixed mold core and the movable mold core in an un-molded state in an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the structure of the fixed mold core in an embodiment of the present invention;

[0036] Figure 5 is a schematic structural diagram of a support frame in an embodiment of the present invention;

[0037] Figure 6 is a structural schematic diagram of a support frame at another angle in an embodiment of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the fixed mold core and the movable mold core in the mold closing state in an embodiment of the present invention;

[0039] Figure 8 yes Figure 7 Sectional view along AA direction;

[0040] Fig. 9 is a flow chart of an injection molding system control method in an embodiment of the present invention;

[0041] Fig.10 is a logic diagram of an injection molding system control method in an embodiment of the present invention;

[0042] Fig.11 It is another logical schematic diagram of the injection molding system control method in the embodiment of the present invention.

[0043] In the figure: 1. fixed die assembly; 11. fixed die plate; 12. fixed die core; 121. first groove; 122. first mounting groove; 123. boss; 13. fixed die base plate; 2. movable die assembly; 21. movable die plate; 22. movable die core; 221. second groove; 222. second mounting groove; 3. displacement sensor; 31. detection end; 32. transmission end; 4. support frame; 41. fixing part; 42. protrusion; 5. clamping nut; 6. anti-loosening nut; 7. screw.

[0044] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0046] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Embodiment 1

[0049] like Figures 1 to 8 As shown, an injection mold is provided in an embodiment of the present invention, including a fixed mold plate 11 and a movable mold plate 21, a fixed mold core 12 is installed on the fixed mold plate 11, and a movable mold core 22 is installed on the movable mold plate 21, and the fixed mold core 12 and the movable mold core 22 form a mold cavity after being locked, and at least one displacement sensor 3 is installed on the fixed mold core 12 for detecting the gap between the parting surface of the fixed mold core 12 and the parting surface of the movable mold core 22.

[0050] In this embodiment, the gap of the parting surface is obtained by the displacement sensor 3, and then the gap of the parting surface is adjusted to meet the injection molding process parameter requirements to avoid the gap of the parting surface being too large, which causes the plastic hot fluid to overflow from the gap of the parting surface between the fixed mold core 12 and the movable mold core 22, resulting in flash on the plastic product; or the gap of the parting surface is too small, which causes the gas in the mold cavity to be unable to be quickly discharged, resulting in the plastic product being burnt or short of material.

[0051] like Figure 1 and Figure 2 As shown, in this embodiment, the fixed mold core 12 and the movable mold core 22 are coaxially arranged, the displacement sensor 3 is axially arranged along the fixed mold core 12, and there is a gap between the detection end 31 of the displacement sensor 3 and the corresponding position of the parting surface of the movable mold core 22.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, a fixed mold base plate 13 is provided on the side of the fixed mold plate 11 away from the movable mold plate 21, the fixed mold base plate 13 is in contact with the fixed mold plate 11, and the fixed mold base plate 13, the fixed mold plate 11 and the fixed mold core 12 are arranged in sequence to constitute a fixed mold group 1; a movable mold plate 21 is provided on the side of the movable mold core 22 away from the fixed mold core 12 to constitute a movable mold group 2.

[0053] like Figure 3 and Figure 4 As shown, in this embodiment, a first groove 121 is opened on the fixed mold core 12, and a second groove 221 is opened on the movable mold core 22, and the first groove 121 and the second groove 221 form a mold cavity; a displacement sensor 3 is installed inside the first groove 121 and / or on the outer peripheral side of the opening of the first groove 121, and the detection end 31 of the displacement sensor 3 is placed between the fixed mold core 12 and the movable mold core 22, so as to realize more accurate detection of the real-time gap between the parting surfaces of the fixed mold core 12 and the movable mold core 22.

[0054] like Figure 3 and Figure 4 As shown, in this embodiment, the first groove 121 protrudes toward the interior of the fixed mold core 12 and opens toward the movable mold core 22, and the second groove 221 protrudes toward the exterior of the movable mold core 22 and opens toward the fixed mold core 12. The outer peripheral wall of the second groove 221 fits with the inner peripheral wall of the first groove 121, and the first groove 121 and the second groove 221 form a mold cavity.

[0055] like Figure 3 and Figure 4As shown, in this embodiment, at least one displacement sensor 3 is installed inside the first groove 121, which is used to determine whether 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 within the normal range that meets the requirements of the injection molding process parameters; a plurality of displacement sensors 3 are symmetrically installed on the outer peripheral side of the opening of the first groove 121, which can not only determine whether the gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 is within the normal range that meets the requirements of the injection molding process parameters, but also determine whether the parting surfaces of the fixed mold group 1 and the movable mold group 2 are in a balanced state.

[0056] like Figures 5 to 8 As shown, in this embodiment, a first mounting groove 122 is provided on the outer peripheral side of the opening of the first groove 121, which protrudes toward the interior of the fixed mold core 12 and opens toward the movable mold core 22. A support frame 4 is embedded in the first mounting groove 122. The bottom of the first mounting groove 122 and the support frame 4 have a coaxial through hole. The detection end 31 of the displacement sensor 3 is embedded in the through hole of the support frame 4, and the signal end of the displacement sensor 3 passes through the through hole at the bottom of the first mounting groove 122.

[0057] like Figures 5 to 8 As shown, in this embodiment, a second mounting groove 222 is provided on the movable mold core 22, which protrudes toward the interior of the movable mold core 22 and opens toward the fixed mold core 12. The support 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.

[0058] like Figure 5 and Figure 6 As shown, in this embodiment, the axis of the support frame 4 is arranged in the same direction as the axis of the fixed mold core 12; preferably, the support frame 4 is a cylindrical support frame, and the first mounting groove 122 and the second mounting groove 222 are arranged in the same direction as matching cylindrical grooves. The detection end 31 of the displacement sensor 3 is embedded in the support frame 4, and the transmission end 32 of the displacement sensor 3 passes through the support frame 4 to transmit the real-time gap 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 the gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 is within the normal range that meets the requirements of the injection molding process parameters. At the same time, the support frame 4 is a cylindrical support frame, which can effectively prevent the overflow from affecting the displacement sensor 3.

[0059] like Figure 4 , Figure 7 and Figure 8 As shown, in this embodiment, a first groove 121 is opened on the fixed mold core 12, and a boss 123 extending axially toward the movable mold core 22 is provided at the bottom of the first groove 121. The bottom of the first groove 121 and the boss 123 have a coaxial through hole, and 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 passes through the through hole at the bottom of the first groove 121.

[0060] like Figure 4 , Figure 7 and Figure 8 As shown, in this embodiment, the axis of the boss 123 is arranged in the same direction as the axis of the fixed mold core 12 , and the extended end of the boss 123 and the parting surface of the fixed mold core 12 are in the same horizontal plane or inside the first groove 121 .

[0061] like Figure 4 , Figure 7 and Figure 8 As shown, in this embodiment, the boss 123 is a cylindrical boss, the axis of the cylindrical boss coincides with the center line of the through hole opened on the cylindrical boss, and the through hole is a stepped 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 passes through the through hole of the boss 123, and transmits the 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 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 within the normal range that meets the requirements of the injection molding process parameters. At the same time, the boss 123 is a cylindrical boss, which can effectively prevent the overflow from affecting the displacement sensor 3.

[0062] Specifically, a first groove 121 is provided on the fixed mold core 12, and first mounting grooves 122 are symmetrically provided at four corners on the outer peripheral side of the first groove 121. A second mounting groove 222 is provided at a corresponding position of the movable mold core 22. The bottom of the first mounting groove 122 and the support frame 4 have a coaxial through hole, and the displacement sensor 3 passes through the bottom of the first mounting groove 122 and the through hole of the support frame 4 in sequence. The displacement sensor 3 has an external thread, and both ends of the external thread are respectively fastened to the fixed mold plate 11 and the support frame 4 through a locking nut 6. The outer peripheral side of the support frame 4 is fixed to the fixed mold plate 11 through a screw 7. The detection end 31 of the sensor 3 is located inside the support frame 4, the support frame 4 is embedded in the second mounting groove 222, and the support frame 4 and the second mounting groove 222 are adapted to each other; the bottom of the first groove 121 and the boss 123 have a coaxial through hole, and the through hole at the bottom of the first groove 121 is a stepped hole. The displacement sensor 3 passes through the through holes at the bottom of the first groove 121 and the boss 123 in turn, and the anti-loosening nut 6 is screwed into the stepped hole at the bottom of the first groove 121 and is fastened with the external thread of the displacement sensor 3, and then the clamping nut 5 is screwed into the stepped hole of the fixed mold core 12, and the anti-loosening nut 6 is tightened.

[0063] Through the above-mentioned injection mold, the displacement sensor 3 is used to obtain the gap between the parting surface of the fixed mold core 12 and the parting surface of the movable mold core 22, and then 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 obtained to judge whether the gap of the parting surface meets the requirements of the injection molding process parameters, so as to prevent the final plastic product from having flash due to too large a gap, or the final plastic product from being burnt or missing materials due to too small a gap, thereby reducing the product quality.

[0064] Embodiment 2

[0065] like Figures 9 to 11 As shown, an embodiment of the present invention provides a control method for an injection molding system, wherein the injection molding system includes an injection mold, a clamping device and a control device, and a displacement sensor 3 is provided on the injection mold. The method includes:

[0066] S1, obtain the mold spacing of each sensor corresponding to the position when the mold is closed without load, that is, S1, S2, ... Sn;

[0067] S2, during injection molding, a clamping force is applied to the movable mold assembly 2 to perform mold clamping, and the real-time spacing of the corresponding position of any displacement sensor 3 is obtained, i.e., S1', S2', ... Sn';

[0068] S3, obtaining the change value of the real-time spacing of the plurality of displacement sensors 3 relative to the mold spacing, wherein:

[0069] Compare any acquired change value with a preset spacing change threshold; or compare the difference between any two change values ​​at the same time with a preset difference;

[0070] S4, adjusting the clamping force applied to the movable die set 2 according to the comparison result.

[0071] In this embodiment, the change value of the real-time spacing of the displacement sensor 3 relative to the mold spacing is the real-time gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2, and the preset spacing change threshold is the reasonable gap range between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2.

[0072] like Fig. 9 and Fig.10 As shown, in this embodiment, in step S3, if any of the obtained change values ​​are greater than the maximum value of the preset spacing change threshold, the clamping force applied to the movable mold assembly 2 is increased, and step S1 is re-executed; the real-time gap between the parting surface of the fixed mold assembly 1 and the parting surface of the movable mold assembly 2 is greater than the reasonable gap range, and the plastic hot fluid is prone to overflow from the gap between the parting surface of the fixed mold core 12 and the parting surface of the movable mold core 22, causing flash on the plastic product.

[0073] like Fig. 9 and Fig.10 As shown, in this embodiment, in step S3, if any of the obtained change values ​​are less than or equal to the preset minimum spacing change threshold, the clamping force applied to the movable mold group 2 is reduced, and step S1 is re-executed; 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 smaller than the reasonable gap range, and the gas in the mold cavity cannot be quickly discharged, causing the plastic product to burn or partially lack material.

[0074] like Fig. 9 and Fig.10As shown, in this embodiment, in step S3, if any of the acquired change values ​​are less than or equal to the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the current clamping force value meets the injection molding process parameter requirements.

[0075] like Fig. 9 and Fig.10 As shown, in this embodiment, in step S3, when any obtained change value is less than the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the clamping force applied to the movable mold group 2 is reduced, and step S1 is re-executed until the change value is equal to the maximum value of the preset spacing change threshold, and the current clamping force value is determined to be the optimal value.

[0076] In this embodiment, while ensuring that the change value is within the preset distance difference range, the smaller the clamping force, the lower the rigidity required for the system, thereby extending the service life of the injection mold. When the change value is equal to the maximum value of the preset distance difference range, the clamping force is the minimum value of the reasonable clamping force range.

[0077] like Fig. 9 and Fig.11 As shown, in this embodiment, in step S3, if the difference between any two change values ​​at the same time is less than or equal to the preset maximum difference value, and greater than the preset minimum difference value, then the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 are in a balanced state; if the difference between any two change values ​​at the same time is greater than or equal to the preset maximum difference value or less than the preset minimum difference value, the clamping force applied to different positions of the movable mold group 2 is adjusted, and step S1 is re-executed.

[0078] like Fig. 9 and Fig.11 As shown, in this embodiment, step S3 also includes: if the clamping force applied to the movable mold assembly 2 is greater than or equal to the maximum value of the preset clamping force range, the balance of the parting surface of the fixed mold assembly 1 and / or the parting surface of the movable mold assembly 2 is adjusted, and step S1 is re-executed to make the real-time gap between the parting surface of the fixed mold assembly 1 and the parting surface of the movable mold assembly 2 within a reasonable gap range, thereby facilitating the operator of the injection mold to understand the use of the injection mold and perform maintenance and repair on the mold in a timely manner.

[0079] In this embodiment, during the mold clamping operation, the control device receives the real-time displacement data between the parting surfaces transmitted by the displacement sensor 3 , and stores the mold clamping force in association with the change value between the parting surfaces obtained by each displacement sensor 3 .

[0080] In this embodiment, the clamping force and the change value between the parting surfaces obtained by each displacement sensor 3 are associated and stored in the cloud server to form a database. Before performing the clamping operation, the reasonable clamping pressure is obtained through the database to ensure that the change 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 required by the injection molding process parameters.

[0081] In this embodiment, by collecting the real-time gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2, a dynamic gap data curve between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 is formed, which facilitates the operator of the injection mold to understand the use of the injection mold, adjust the injection molding process parameters in time, thereby improving the quality of plastic parts, and timely maintain and repair the mold.

[0082] By comparing the change value with the preset spacing change threshold, 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 judged and compared with the reasonable gap range. According to the comparison result, the clamping force applied to the movable mold group 2 is quickly and accurately adjusted, so that the gap between the parting surface of the fixed mold group 1 and the parting surface of the movable mold group 2 reaches the normal value range required by the injection molding process parameters.

[0083] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An injection mold, comprising a fixed mold plate and a movable mold plate, wherein a fixed mold core is installed on the fixed mold plate, and a movable mold core is installed on the movable mold plate, and the fixed mold core and the movable mold core are locked to form a mold cavity, characterized in that: At least one displacement sensor is installed on the fixed mold core to obtain the gap between the parting surface of the fixed mold core and the parting surface of the movable mold core; A first mounting groove protruding toward the interior of the fixed mold core and opening toward the movable mold core is provided on the outer peripheral side of the mold cavity, a support frame is embedded in the first mounting groove, a coaxial through hole is provided at the bottom of the first mounting groove and the support frame, a detection end of the displacement sensor is embedded in the through hole of the support frame, and a signal end of the displacement sensor passes through the through hole at the bottom of the first mounting groove; The movable mold core is provided with a second installation groove protruding toward the inside of the movable mold core and opening toward the fixed mold core, and at least a part of the support frame is embedded in the second installation groove; The displacement sensor has an external thread, and two ends of the external thread are respectively fastened to the fixed template and the supporting frame.

2. An injection mold according to claim 1, characterized in that: A first groove is formed on the fixed mold core, and a second groove is formed on the movable mold core, and the first groove and the second groove form a mold cavity; A displacement sensor is installed on the outer peripheral side of the opening of the first groove, and a detection end of the displacement sensor is placed between the fixed mold core and the movable mold core.

3. An injection mold according to claim 1, characterized in that: The support frame includes a fixing portion and a protruding portion, wherein the fixing portion is embedded in the first mounting groove, and the protruding portion is embedded in the second mounting groove.

4. An injection mold according to claim 2, characterized in that: A boss extending axially toward the movable mold core is provided at the bottom of the first groove. The bottom of the first groove and the boss have a coaxial through hole. The detection end of the displacement sensor is embedded in the through hole of the boss, and the signal end of the displacement sensor passes through the through hole at the bottom of the first groove.

5. A control method for an injection molding system, characterized in that: The injection molding system comprises the injection mold, the clamping device and the control device according to any one of claims 1 to 4, the injection mold is provided with a displacement sensor, and the method comprises: S1, obtain the mold spacing of each sensor corresponding to the position when the mold is closed without load; S2, during injection molding, a clamping force is applied to the movable mold assembly to perform mold clamping, and the real-time spacing of the corresponding position of any displacement sensor is obtained; S3, obtaining the change value of the real-time spacing of multiple displacement sensors relative to the mold spacing, wherein: Compare any acquired change value with a preset spacing change threshold; or compare the difference between any two change values ​​at the same time with a preset difference; S4, adjusting the clamping force applied to the movable mold assembly according to the comparison result.

6. The control method of the injection molding system according to claim 5, characterized in that: In step S3, if any of the obtained change values ​​is greater than the maximum value of the preset spacing change threshold, the clamping force applied to the movable mold assembly is increased, and step S1 is executed again; If any of the obtained change values ​​is less than or equal to the preset minimum spacing change threshold, the clamping force applied to the movable die set is reduced, and step S1 is executed again; If any of the obtained change values ​​are less than or equal to the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the current clamping force value meets the injection molding process parameter requirements.

7. The control method of the injection molding system according to claim 6, characterized in that: In step S3, if any of the obtained change values ​​are less than the maximum value of the preset spacing change threshold and greater than the minimum value of the preset spacing change threshold, the clamping force applied to the movable mold group is reduced, and step S1 is re-executed until the change value is equal to the maximum value of the preset spacing change threshold, and the current clamping force value is determined to be the optimal value.

8. The control method of the injection molding system according to claim 5, characterized in that: In step S3, if the difference between any two change values ​​at the same time is less than or equal to the preset maximum difference value and greater than the preset minimum difference value, then the molding surface of the fixed mold assembly and the molding surface of the movable mold assembly are currently in a balanced state; If the difference between any two change values ​​at the same time is greater than or equal to the preset maximum difference value or less than the preset minimum difference value, the clamping force applied to different positions of the movable die set is adjusted and step S1 is executed again.

9. A control method for an injection molding system according to any one of claims 6 to 8, characterized in that: Step S4 also includes: if the clamping force applied to the movable mold assembly is greater than or equal to the maximum value of the preset clamping force range, adjusting the balance of the molding surface of the fixed mold assembly and / or the molding surface of the movable mold assembly, and re-executing step S1.

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