Device for measuring displacement of optical compression mold at high precision

Abstract

The utility model relates to a device for measuring the displacement of an optical compression mold with high precision, which comprises a position detection device, a movable mold seat, a fixed mold seat, a movable mold and a fixed mold, a plurality of support columns are arranged above the movable mold seat, support plates are fixed in front of and behind the movable mold seat, a base plate is arranged above the support plates, and the movable mold seat and the fixed mold are arranged on the base plate. A first groove is formed in the upper surface of the base plate, a belleville spring capable of applying extrusion force to the movable mold is arranged in the first groove, the movable mold is located above the base plate, the fixed mold is located above the movable mold, the fixed mold is fixed to the fixed mold base, and an ejection structure for ejecting a product is arranged on the movable mold base. The position detection device is fixed to the outer side of the movable mold of the mold and used for detecting the compression position of the mold, a reset mechanism for resetting the ejection structure is arranged on the ejection structure, and an ejection rod via hole is formed in the bottom of the movable mold base. According to the utility model, high-precision monitoring of the compression position of the optical compression reflector can be realized.

Description

Technical Field

[0001] The utility model relates to the field of optical product production and manufacturing, in particular to a device for measuring the displacement of an optical compression mold with high precision. Background Art

[0002] With the development of society and the continuous growth of the new energy vehicle industry, the demand for optical reflectors is also increasing, and it is also a trend to replace glass reflectors with plastic. The surface accuracy requirements of optical reflectors are extremely strict, so the mold design basically adopts the parting surface compression method for injection molding, which is conducive to reducing the surface deformation caused by excessive local stress of the reflector. How to monitor and control the compression and accuracy of the reflector at each stage is a major problem in the injection molding industry.

[0003] However, the in-mold pressure sensor monitoring currently used in the industry can only monitor the cavity pressure inside the mold, and requires high temperature resistance. The molding mold temperature of the optical reflector is as high as 130°C, which requires the monitor to have extremely high temperature resistance. In addition, the effect of such operation is not only expensive, but also more likely to accelerate the damage of accessories under high temperature conditions, which is undoubtedly an invisible cost waste for enterprises. Moreover, it is more difficult to monitor the compression position in real time with high precision, which is also a major problem in the injection molding compression industry. Utility Model Content

[0004] The purpose of the utility model is to provide a device for measuring the displacement of an optical compression mold with high precision, which can realize high-precision monitoring of the compression position of an optical compression reflector and save the financial cost pressure of purchasing expensive pressure sensors.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for measuring the displacement of an optical compression mold with high precision, comprising a position detection device, a movable mold seat, a fixed mold seat, a mold movable mold and a mold fixed mold, a plurality of support columns are arranged above the movable mold seat, support plates are fixed at the front and rear of the movable mold seat, a pad is arranged above the support plate, a first groove body is provided on the upper surface of the pad, a disc spring that can apply extrusion force to the mold movable mold is arranged in the first groove body, the mold movable mold is located above the pad, the mold fixed mold is located above the mold movable mold, the mold fixed mold is fixed on the fixed mold seat, an ejection structure for ejecting a product is arranged on the movable mold seat, the position detection device is fixed on the outer side of the mold movable mold, and is used to detect the compression position of the mold, a reset mechanism for resetting the ejection structure is arranged on the ejection structure, and a ejector rod through hole is arranged at the bottom of the movable mold seat.

[0006] Furthermore, the mold fixed mold includes a fixed mold plate and a fixed mold insert, the fixed mold plate is fixed on the fixed mold base, the fixed mold plate is provided with a second groove body for placing the fixed mold insert, the fixed mold insert is fixed in the second groove body, and the fixed mold insert is provided with a product glue inlet.

[0007] Furthermore, the movable mold of the mold includes a movable mold plate, a movable mold insert, and a movable mold core. The movable mold plate is located below the fixed mold plate. The upper surface of the fixed mold plate is provided with a third groove body capable of placing the movable mold insert. The movable mold insert is fixed in the third groove body. An opening is provided on the movable mold insert. The movable mold core is located in the opening. A guide slider is sleeved on the portion of the movable mold core below the movable mold insert. The guide slider is located on the lower surface of the movable mold insert and fixed between the movable mold insert and the movable mold plate.

[0008] Furthermore, the ejection structure includes an ejector base plate, an ejector panel, and an ejector. The ejector base plate is located on the upper surface of the movable mold base, the ejector panel is located on the upper surface of the ejector base plate, and a first through hole is provided on the ejector base plate and the ejector panel so as to allow the support column to pass through. One end of the ejector is fixed to the ejector base plate, and the other end of the ejector passes through the ejector panel, the pad, the movable mold plate, the guide slider and the movable mold insert, and is located at the bottom of the cavity of the movable mold insert.

[0009] Furthermore, the reset mechanism includes a reset rod, a rectangular spring and a high-strength rubber. A fourth groove for placing the high-strength rubber is provided on the bottom plate of the ejector pin, the reset rod is provided on the high-strength rubber, the other end of the reset rod passes through the pad and the movable template and is located on the lower surface of the fixed template, a rectangular spring is sleeved on the reset rod, and a groove for placing the rectangular spring is provided on the lower surface of the pad.

[0010] Furthermore, it also includes a locking structure, which is an equal height screw. A fifth slot is opened on the movable template, and a second through hole is opened at the bottom of the fifth slot. The nut end of the equal height screw is located in the fifth slot, and the other end of the equal height screw is fixed to the pad.

[0011] Furthermore, a limiting block for limiting the ejection distance of the ejector panel is fixed on the upper surface of the ejector panel.

[0012] Furthermore, the height of the fifth slot is 1.5-2 times the height of the equal-height screw nut.

[0013] Furthermore, the position detection device is an inductive distance sensor, part of which is fixed to the lower end of the side of the mold movable mold through a first Teflon fixing structure, and the other part of the inductive distance sensor is fixed to the upper end of the side of the pad through a second Teflon fixing structure.

[0014] The beneficial effects of the utility model are as follows: the utility model has the characteristics of low cost and high switching implementation efficiency, which saves optical manufacturing companies the financial cost pressure of purchasing expensive pressure sensors; at the same time, it also ensures the surface requirements of special types of optical plastic parts manufacturing and production, and provides a strong guarantee for the manufacturing of highly stable and high-quality optical plastic parts, while realizing high-precision monitoring of the compression position of the optical compression reflector, and reducing the debugging cycle, ensuring the stability and repeatability of the production products; by observing the position curve, the compression distance and repeatability during the molding process can be observed in real time, so that the injection molding process is no longer non-visualized, and it replaces the expensive in-mold pressure monitor, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the mold in the device of the utility model in a fully compressed state;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the equal height screws and the movable template of the utility model.

[0018] Among them: 101, inductive distance sensor, 103, first Teflon fixing structure, 104, second Teflon fixing structure, 105, fastening screws, 2, mold fixed mold, 21, fixed mold plate, 22, fixed mold insert, 23, product glue inlet, 3, mold movable mold, 31, movable mold plate, 32, movable mold insert, 33, movable mold core, 34, guide slider, 4, ejector rod through hole, 5, ejection structure, 51, ejector base plate, 52, ejector panel, 53, ejector, 6, reset mechanism, 61, reset rod, 62, rectangular spring, 63, excellent glue, 7, disc spring, 8, support column, 9, movable mold base, 10, fixed mold base, 11, support plate, 12, pad, 13, equal height screws, 14, limit block, 15, injection molding panel, 16, product, 17, parting surface. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings. For better understanding, the orientation of the present invention is described according to the orientation shown in the accompanying drawings and cannot be understood as a limitation of the present application; the following terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] See also Figures 1 to 3 The utility model provides an embodiment: a device for high-precision measurement of displacement of an optical compression mold, comprising a position detection device 1, a movable mold seat 9, a fixed mold seat 10, a mold movable mold 3 and a mold fixed mold 2, a plurality of support columns 8 are arranged above the movable mold seat 9, a support plate 11 is fixed to the front and rear of the movable mold seat 9, a pad 12 is arranged above the support plate 11, a first groove body is opened on the upper surface of the pad 12, and a disc that can be used to press the mold movable mold 3 by extrusion force is arranged in the first groove body The movable mold 3 of the mold is located above the pad 12, the fixed mold 2 of the mold is located above the movable mold 3 of the mold, the fixed mold 2 of the mold is fixed on the fixed mold base 10, and the movable mold base 9 is provided with an ejection structure 5 for ejecting the product 16. The position detection device 1 is fixed to the outside of the movable mold 3 of the mold and is used to detect the compression position of the mold. The ejection structure 5 is provided with a reset mechanism 6 for resetting the ejection structure 5, and the bottom of the movable mold base 9 is provided with an ejector rod through hole 4. The movable mold base plate can fix the movable mold 3 part of the mold on the injection molding machine, the fixed mold base plate can fix the fixed mold 2 part of the mold on the injection molding machine, the Teflon fixing mechanism can fix the position detection device 1 on the mold, and play a role in heat insulation to protect electrical components. The position detection device 1 can detect the compression position of the mold and provide real-time feedback to the injection molding machine system. The clamping mechanism can control the process of the dynamic and fixed molds closing the molds. The injection control panel controls and detects the entire injection and compression process by setting parameters to form a closed loop in the injection process. The support column 8 can support the pad 12 to prevent the pad 12 from being deformed due to excessive pressure. The working process of the utility model is that the ejector pin on the injection molding machine passes through the ejector pin through hole 4 to push the ejector pin 53 and the bottom plate 51 out, and the disc spring 7 can squeeze the dynamic mold plate 31 to drive the dynamic mold insert 32, so that the parting surface 17 is closed tightly, which is convenient for the injection and compression process. During the injection process, the injection pressure is maintained to provide sufficient supporting force, the compression position of the movable mold 3 of the mold is observed through the position detection device 1, and real-time feedback is given to the injection molding machine system and displayed on the injection molding panel 15. After the injection molding is completed, the ejector rod provides power again to push the bottom plate 51 of the ejector pin 53 to eject the product 16, thereby driving the ejector pin 53 to eject the product 16, and completing the demoulding of the product 16. After the demoulding is completed, the ejector pin 53 is completely returned to its original position through the compression elastic force of the reset rod 61, the urethane foam 63 and the rectangular spring 62 in the reset mechanism 6.

[0021] Please continue reading Figure 1As shown, in one embodiment of the utility model, the mold fixed mold 2 includes a fixed mold plate 21 and a fixed mold insert 22, the fixed mold plate 21 is fixed on the fixed mold base 10, a second slot body capable of placing the fixed mold insert 22 is provided on the fixed mold plate 21, the fixed mold insert 22 is fixed in the second slot body, and a product glue inlet 23 is provided on the fixed mold insert 22. The fixed mold plate 21 fixes the fixed mold insert 22, the fixed mold insert 22 is one of the main parts of the molding cavity of the product 16, and the fixed mold insert 22 contains the product glue inlet 23 for glue injection.

[0022] Please continue reading Figures 1 to 3 As shown, in one embodiment of the utility model, the movable mold 3 of the mold includes a movable mold plate 31, a movable mold insert 32, and a movable mold core 33. The movable mold plate 31 is located below the fixed mold plate 21. The upper surface of the fixed mold plate 21 is provided with a third groove body capable of placing the movable mold insert 32. The movable mold insert 32 is fixed in the third groove body. An opening is provided on the movable mold insert 32. The movable mold core 33 is located in the opening. The portion of the movable mold core 33 below the movable mold insert 32 is sleeved with a guide slider 34. The guide slider 34 is located on the lower surface of the movable mold insert 32 and is fixed between the movable mold insert 32 and the movable mold plate 31. The movable mold plate 31 fixes the movable mold insert 32 and the guide sliding block 34. The fixed mold insert 22, the movable mold insert 32 and the movable mold core constitute the main part of the molding cavity of the product 16. The movable mold insert 32 and the movable mold core are clearance-matched. The movable mold core 33 is an important part that determines the compression area. The guide sliding block 34 cooperates with the movable mold core 33 to guide and position the movable mold core 33, and protects the fixed mold core from friction and burns with the movable mold insert 32 during the compression process.

[0023] Please continue reading Figure 1 to Figure 2 As shown, in one embodiment of the utility model, the ejection structure 5 includes an ejector base plate 51, an ejector panel 52, and an ejector 53. The ejector base plate 51 is located on the upper surface of the movable mold base 9, and the ejector panel 52 is located on the upper surface of the ejector base plate 51. The ejector base plate 51 and the ejector panel 52 are provided with a first through hole that allows the support column 8 to pass through. One end of the ejector 53 is fixed to the ejector base plate 51, and the other end of the ejector 53 passes through the ejector panel 52, the backing plate 12, the movable mold plate 31, the guide slider 34 and the movable mold insert 32, and is located at the bottom of the cavity of the movable mold insert 32. The ejector base plate 51 is locked with the ejector panel 52 to fix the ejector 53 and the reset rod 61, so as to realize the ejection function and the reset function. The ejector 53 ejects the product 16 to complete the demolding of the product 16.

[0024] Please continue reading Figure 1As shown, in one embodiment of the utility model, the reset mechanism 6 includes a reset rod 61, a rectangular spring 62 and a high-strength glue 63. The ejector base plate 51 is provided with a fourth slot for placing the high-strength glue 63. The high-strength glue 63 is provided with the reset rod 61. The other end of the reset rod 61 passes through the pad 12 and the movable plate 31 and is located on the lower surface of the fixed plate 21. The reset rod 61 is sleeved with a rectangular spring 62. The lower surface of the pad 12 is provided with a slot for placing the rectangular spring 62. When the reset rod 61 is in mold closing, the fixed plate 21 presses the top surface of the reset rod 61 to ensure that the ejector panel 52 and the ejector base plate 51 drive the ejector 53 to return completely. The rectangular spring 62 drives the ejector 53 to return automatically by squeezing the ejector panel 52 after the product 16 is ejected. The high-strength glue 63 ensures that when the mold is in the mold closing and uncompressed state, the ejector base plate 51 drives the ejector 53 to return completely through the elastic force of the high-strength glue 63.

[0025] Please continue reading Figure 1 , Figure 3 As shown, in one embodiment of the utility model, a locking structure is also included, the locking structure is an equal height screw 13, a fifth slot is provided on the movable plate 31, a second through hole is provided at the bottom of the fifth slot, the nut end of the equal height screw 13 is located in the fifth slot, and the other end of the equal height screw 13 is fixed on the pad 12. The equal height screw 13 limits the distance that the movable plate 31 is stretched open by the disc spring 7, that is, limits the distance of the compression space.

[0026] Please continue reading Figure 1 As shown, in one embodiment of the utility model, a limit block 14 for limiting the ejection distance of the ejector panel 52 is fixed on the upper surface of the ejector panel 52. The limit block 14 limits the ejection stroke of the ejector 53 by limiting the ejection distance of the ejector panel 52.

[0027] Please continue reading Figure 1 , Figure 3 As shown, in one embodiment of the utility model, the height of the fifth slot is 1.5-2 times the height of the nut of the equal height screw 13. The fifth slot is higher than the width of the nut of the high screw so that the equal height screw 13 can be limited by a certain distance.

[0028] Please continue reading Figure 2 , Figure 3As shown, in one embodiment of the utility model, the position detection device is an inductive distance sensor 101, part of the inductive distance sensor 101 is fixed to the lower end of the side of the mold movable mold 3 through a first Teflon fixing structure 103, and the other part of the inductive distance sensor 101 is fixed to the upper end of the side of the pad 12 through a second Teflon fixing structure 104. The model of the inductive distance sensor 101 is BAUMER-IWFE 18U7504 / S35A. The inductive distance sensor 101 is used to detect the compression distance. The inductive distance sensor 101 converts the contact physical signal of the contact device into an electronic signal and inputs it to the display of the injection molding machine, showing the specific compression process of the product and the real-time data change of the compression distance. The inductive distance sensor 101 is fixed to the Teflon fixing structure by a fastening screw 105, and the Teflon fixing structure is fixed by the fastening screw 105. The Teflon fixing structure can play a role in heat insulation protection.

[0029] The utility model has the following working principle: a position measuring device is fixed on a Teflon fixing mechanism by means of thread locking, and the Teflon fixing mechanism is fixed at a position between a movable platen and a pad by means of thread locking; the position measuring device is connected to a measuring port of an injection molding machine through a four-pin terminal, and then a unit conversion of the position measuring device is set on an injection panel; when the temperature of the mold reaches a set temperature, a sufficiently large clamping force is set, and a clearance between a fixed mold and a movable mold of the mold is returned to 0 through a clamping mechanism, and then the position compensation between the movable platen and the padn is returned to 0, that is, the original value of the position measuring device is returned to 0; when the movable mold of the mold is pressed against the fixed mold of the mold, real-time monitoring of the position between the movable platen and the padn by the measuring device can be observed through the injection panel, and the clamping mechanism is adjusted by observing the compression distance, so that a certain compression distance is always maintained between the movable platen and the padn, a compression process curve is formed on the injection panel, and the position change trend of the compression process is observed.

[0030] The above description is only a preferred embodiment of the present utility model and cannot be understood as a limitation of the present application. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the present utility model.

Claims

1. A device for measuring the displacement of an optical compression mold with high precision, characterized in that: The utility model comprises a position detection device, a movable mold base, a fixed mold base, a mold movable mold and a mold fixed mold, a plurality of support columns are arranged above the movable mold base, support plates are fixed at the front and rear of the movable mold base, a pad is arranged above the support plate, a first groove body is provided on the upper surface of the pad, a disc spring which can apply extrusion force to the mold movable mold is arranged in the first groove body, the mold movable mold is located above the pad, the mold fixed mold is located above the mold movable mold, the mold fixed mold is fixed on the fixed mold base, an ejection structure for ejecting the product is arranged on the movable mold base, the position detection device is fixed on the outer side of the mold movable mold and is used to detect the compression position of the mold, a reset mechanism for resetting the ejection structure is arranged on the ejection structure, and an ejector rod through hole is arranged at the bottom of the movable mold base.

2. The device for high-precision measurement of displacement of an optical compression mold according to claim 1, characterized in that: The mold fixed die includes a fixed die plate and a fixed die insert. The fixed die plate is fixed on the fixed die base. A second slot body capable of accommodating the fixed die insert is opened on the fixed die plate. The fixed die insert is fixed in the second slot body. A product glue inlet is opened on the fixed die insert.

3. The device for high-precision measurement of displacement of an optical compression mold according to claim 2, characterized in that: The movable mold of the mold includes a movable mold plate, a movable mold insert, and a movable mold core. The movable mold plate is located below the fixed mold plate. The upper surface of the fixed mold plate is provided with a third groove body capable of placing the movable mold insert. The movable mold insert is fixed in the third groove body. An opening is provided on the movable mold insert. The movable mold core is located in the opening. A guide slider is sleeved on the portion of the movable mold core below the movable mold insert. The guide slider is located on the lower surface of the movable mold insert and is fixed between the movable mold insert and the movable mold plate.

4. The device for high-precision measurement of displacement of an optical compression mold according to claim 3, characterized in that: The ejection structure includes an ejector base plate, an ejector panel, and an ejector. The ejector base plate is located on the upper surface of the movable mold base, the ejector panel is located on the upper surface of the ejector base plate, the ejector base plate and the ejector panel are provided with a first through hole through which the support column can pass, one end of the ejector is fixed to the ejector base plate, and the other end of the ejector passes through the ejector panel, the backing plate, the movable mold plate, the guide slider and the movable mold insert, and is located at the bottom of the cavity of the movable mold insert.

5. The device for high-precision measurement of displacement of an optical compression mold according to claim 4, characterized in that: The reset mechanism includes a reset rod, a rectangular spring and a high-strength rubber. A fourth groove for placing the high-strength rubber is provided on the bottom plate of the ejector pin. The reset rod is provided on the high-strength rubber. The other end of the reset rod passes through the pad and the movable template and is located on the lower surface of the fixed template. A rectangular spring is sleeved on the reset rod. A groove capable of placing the rectangular spring is provided on the lower surface of the pad.

6. The device for high-precision measurement of displacement of an optical compression mold according to claim 3, characterized in that: It also includes a locking structure, which is an equi-height screw. A fifth slot is opened on the movable template, a second through hole is opened at the bottom of the fifth slot, the nut end of the equi-height screw is located in the fifth slot, and the other end of the equi-height screw is fixed to the pad.

7. The device for high-precision measurement of displacement of an optical compression mold according to claim 4, characterized in that: A limiting block for limiting the ejection distance of the ejector panel is fixed on the upper surface of the ejector panel.

8. The device for high-precision measurement of displacement of an optical compression mold according to claim 6, characterized in that: The height of the fifth slot is 1.5-2 times the height of the nut of the equal-height screw.

9. The device for high-precision measurement of displacement of an optical compression mold according to claim 1, characterized in that: The position detection device is an inductive distance sensor, part of which is fixed to the lower end of the side of the mold movable mold through a first Teflon fixing structure, and the other part of the inductive distance sensor is fixed to the upper end of the side of the pad through a second Teflon fixing structure.

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