Synchrotron radiation X-ray on-line research injection mold capable of rapidly switching forming mold cores

Abstract

A synchrotron radiation X-ray on-line research injection mold capable of rapidly switching forming mold cores comprises a fixed mold part, a movable mold part and a heating assembly, the movable mold part is located below the fixed mold part, and the demolding process of injection molding is completed in the mode that parting of an inclined sliding block is matched with ejection of an ejector rod. Comprising an incident side sliding block and an emergent side sliding block which form an injection cavity in a spliced mode, and a transparent window which allows an X-ray beam to penetrate through and does not generate interference is formed in the side wall of the injection cavity; a pressure sensor and a temperature sensor are installed on the incidence side sliding block and used for monitoring technological parameters in real time, and a sample mold core plate and a variable-thickness insert which can be rapidly switched are arranged in the emergence side sliding block. According to the injection mold disclosed by the invention, due to the existence of the mold core plate and the insert which can be quickly replaced, the manufacturing cost and the replacement time of the mold can be reduced, the production flexibility and efficiency are improved, and the injection mold can be combined with a synchrotron radiation X-ray experiment station for in-situ research on a polymer physical phenomenon of a polymer injection product under unbalanced and nonlinear processing.

Description

Technical Field

[0001] The present invention relates to the field of polymer processing equipment, and in particular to a synchrotron radiation X-ray online research injection mold capable of rapidly switching molding cores, so that polymer molding samples of different shapes and thicknesses can be efficiently prepared, and the mold can be used in conjunction with a synchrotron radiation X-ray scattering experimental station to in-situ detect the evolution behavior of the microstructure of polymer samples of different shapes and thicknesses under the action of a non-equilibrium, nonlinear external field during the injection molding process. Background Art

[0002] As one of the core processes of modern manufacturing, injection molding injects molten plastic into a precision mold under high pressure, rapidly cools and solidifies the mold, and realizes one-time precise manufacturing of complex structural parts. The advantages of the injection molding method are high automation, clean environment, high molding efficiency, the shape can be from simple to complex, the size can be from large to small, and the product size is accurate. It can form parts with complex shapes, and is suitable for mass production and molding processing fields such as complex-shaped products. Injection molding usually relies on fixed molds for large-scale production to ensure product consistency and efficient output. As the core link of this technology, injection molding mold design is not only related to the shape and quality of the product, but also directly affects production efficiency and cost. However, with the increasing diversification and rapid changes in market demand, the design of injection molding mold cores has become more and more critical. As the core component that determines the shape and quality of the product, its design must take into account precision, durability and flexibility. In this context, the introduction of fast-switching mold core technology is particularly important. It can greatly shorten the mold replacement time, significantly improve the flexibility and efficiency of production, enable production to quickly adapt to market changes, reduce costs, and maintain high-quality product output. Therefore, achieving rapid switching of injection molding cores has become an indispensable part of improving competitiveness and meeting personalized needs.

[0003] At present, most of the research on the structure of injection molded products adopts the offline "black box" mode, which mainly characterizes the structure and performance of the final injection molded product to obtain a semi-quantitative or qualitative structure-performance empirical relationship. It has limited guiding role in the production process and structural performance optimization of injection molded products, and it is difficult to clarify the mutual influence and connection between the multi-scale structure formation of polymers during injection molding. The high brightness of synchrotron radiation X-rays provides high temporal and spatial resolution detection, which enables us to identify the ultra-fast development of microstructures during injection molding and obtain structural data in a high-throughput manner. At present, the polymer science research community at home and abroad has used synchrotron radiation X-ray in situ characterization combined with desktop instruments such as rotational rheometers, small extruders, and micro injection molding machines to study the structure formation process of polymers under thermomechanical environments. However, in situ experiments on industrial-scale injection molding are rarely reported, and there is a lack of research on the molding of injection molded polymer products of certain shapes and different thicknesses. Therefore, it is very important to design and develop in situ sample devices to solve basic and applied scientific problems of polymer materials based on the characteristics of polymer materials. Summary of the invention

[0004] The purpose of the present application is to provide a synchrotron radiation X-ray online research injection mold that can quickly switch molding cores, which solves the problem that a single injection mold core is difficult to simultaneously prepare injection molding samples of various shapes and thicknesses, thereby improving production efficiency and reducing production costs. At the same time, it can be used in conjunction with a synchrotron radiation X-ray scattering experimental station to study multi-scale structural evolution processes such as polymer crystallization.

[0005] The technical solution of the present invention:

[0006] The invention comprises a fixed mold part, a movable mold part and a heating assembly. The movable mold part is located below the fixed mold part. The demoulding process of injection molding is completed by adopting an inclined slider parting and a push rod ejection method. The movable mold part comprises an incident side slider and an exit side slider which are assembled into an injection cavity. A transparent window is arranged on the side wall of the injection cavity to allow the X-ray beam to pass through without causing interference.

[0007] In the present invention, the molding cavity is in the movable mold part, and the cavity is composed of two sliders spliced ​​together. The synchrotron radiation X-ray incident part is on one side of the movable mold, and the receiving part is on the other side of the movable mold. The formation and development process of the polymer microstructure under the action of non-equilibrium and nonlinear processing external field in the injection molding process can be detected in real time, and it is used to study important polymer physical phenomena such as multi-scale structural evolution such as polymer crystallization.

[0008] Furthermore, a pressure sensor and a temperature sensor capable of real-time monitoring of pressure and temperature are installed on the incident side slider. The sensor probe is aligned with the side wall of the cavity, so that real-time online detection of changes in temperature and pressure in the cavity can be achieved.

[0009] Furthermore, the fixed mold part includes a positioning ring, a gate sleeve, a fixed mold base plate and a fixed mold plate; a cylindrical hole is provided in the positioning ring, and cooperates with the outer contour of the gate sleeve, and is pressed on the top of the gate sleeve, the upper part of the gate sleeve is installed on the fixed mold base plate, and the lower part passes through the fixed mold plate, the fixed mold base plate is located above the fixed mold plate, and an insulation plate is provided in the middle.

[0010] Furthermore, the gate sleeve is a stepped cylindrical structure, with its head installed in the cylindrical hole, the shoulder top setting the bottom surface of the positioning ring, and the body and legs passing through the fixed mold bottom plate, the heat insulation plate and the fixed mold plate respectively; the gate sleeve is provided with a through gate runner from top to bottom, and the gate runner includes a hemispherical pit runner at the top and a truncated cone-shaped main runner connected to the bottom of the pit runner. In order to facilitate the extraction of the runner condensate, the main runner is designed to be truncated cone-shaped; the end face of the main runner is made into a hemispherical pit at the contact point with the nozzle, and the two are closely matched to prevent the high-pressure plastic melt from overflowing.

[0011] Furthermore, the movable mold part includes a mold sleeve, a movable mold plate assembly and an ejection demolding assembly; the incident side slider and the exit side slider are installed in the mold sleeve, the movable mold plate assembly is located below the mold sleeve, and the ejection demolding assembly is located below the movable mold plate assembly, and the incident side slider and the exit side slider are ejected upward during demolding.

[0012] Furthermore, the heating assembly includes a first heating plate, a heat insulating plate and a second heating plate, the mold sleeve is connected to the first heating plate, and the heat insulating plate and the second heating plate are arranged under the fixed mold bottom plate.

[0013] Furthermore, the first heating plates are arranged on the upper, lower, left and right sides of the mold sleeve, heating tubes are penetrated through the first heating plates arranged at the upper and lower positions of the mold sleeve, and heating coils are coiled on the first heating plates arranged at the left and right positions of the mold sleeve; a groove is opened on the outer side wall of the mold sleeve, and the groove is configured to place the second heating plate.

[0014] Furthermore, a quadrangular pyramid through hole is opened in the center of the mold sleeve, a rectangular groove is opened on one side of the mold sleeve, and an elliptical through hole is opened on the other side of the mold sleeve. The side where the elliptical through hole is located is perpendicular to the side where the rectangular groove is located, and the rectangular groove and the elliptical through hole are both connected to the quadrangular pyramid through hole; the side wall where the groove is located is arranged parallel to the side wall where the rectangular groove is located.

[0015] Furthermore, the incident side slider and the exit side slider are installed back to back in the four-sided pyramid through hole, and their vertical cross-sections along the left and right directions are both right-angled trapezoidal surfaces, both of which are provided with cooling water channels and are provided with lugs that slide in the guide grooves.

[0016] Furthermore, a U-shaped groove and a mounting cavity are provided on the side of the incident side slider away from the exit side slider, and two pairs of pressure sensor mounting holes, a temperature sensor mounting hole and four first screw holes are provided at the bottom of the mounting cavity; a U-shaped groove and a stepped circular through hole are provided on the side of the exit side slider away from the incident side slider, and a circular boss, a stepped rectangular mounting cavity and a second screw hole are provided on the side in contact with the incident side slider, the circular boss is located on the small rectangular groove at the lower end of the stepped rectangular mounting cavity, the small hole at the upper end of the stepped circular through hole passes through the middle of the circular boss, and the second screw holes are provided at the four corners of the bottom of the large rectangular groove at the upper end of the stepped rectangular mounting cavity.

[0017] Furthermore, four large guide holes and four third screw holes are opened on the upper surface of the mold sleeve, the four large guide holes are respectively located at the four corners of the mold sleeve, and the two third screw holes are respectively located on both sides of the rectangular groove.

[0018] Furthermore, the movable template assembly includes a slider pad, and a fourth screw hole, a guide hole and a first push rod hole are formed on the slider pad, and the four first push rod holes are located in the area enclosed by the four fourth screw holes.

[0019] The push plate assembly further comprises a movable mold base plate located below the slider pad, the inner end of the movable mold base plate is provided with a fifth screw hole, the outer end is provided with a sixth screw hole and a push plate guide column hole, and the center is provided with a second push rod hole, an ejection cavity is formed between the slider pad and the movable mold base plate; the ejection demolding assembly is located in the ejection cavity, the ejection demolding assembly comprises a push plate guide column, a push plate guide sleeve, a push rod fixing plate, a push plate and a push rod, the push plate guide column passes through the bottom of the movable mold base plate and is inserted into the slider pad to be connected, the push plate is located above the movable mold base plate, and the push rod fixing plate is located above the push plate; the push plate guide sleeve is sleeved outside the push plate guide column, and the two ends of the push plate guide sleeve are respectively embedded in the push rod fixing plate and the push plate; the lower end of the push rod passes through the push rod fixing plate to abut against the upper surface of the push plate, and the upper end of the push rod passes through the slider pad to abut against the lower surface of the incident side slider and the lower surface of the exit side slider.

[0020] Furthermore, the movable mold part also includes a fixing assembly, a sample ejection assembly and a core plate. The fixing assembly is arranged in the mounting cavity of the incident side slider, and includes a fixing base plate and a fixing plate. The fixing base plate and the fixing plate are fixed in the first screw hole of the incident side slider by connecting screws, and both are provided with a straight circular hole in the middle, and two pairs of pressure sensor mounting holes and temperature sensor mounting holes on both sides of the straight circular hole, which are aligned and abutted with the two pairs of pressure sensor mounting holes and temperature sensor mounting holes of the incident side slider;

[0021] Furthermore, the sample ejection assembly is arranged in the stepped rectangular mounting cavity of the exit side slider, including a top plate, a ejector fixing plate, a first ejector, a spring, a second ejector and a reset rod. The top plate and the ejection fixing plate are connected by four seventh screw holes, and the upper and lower ends are respectively provided with the angular hole and the first circular through hole, and the first circular through hole is sleeved on the circular boss in the middle of the small rectangular groove at the lower end of the stepped rectangular mounting cavity.

[0022] Furthermore, the core plate is fixed to the large rectangular groove at the upper end of the stepped rectangular mounting cavity of the output side slider through a second screw hole, and two replaceable core plates are provided, including a thin-walled sample core plate and a dumbbell-shaped sample core plate. A rectangular through hole is provided in the middle of the thin-walled sample core plate for installing a replacement insert with a variable thickness. A connecting screw is used to pass through the stepped circular through hole and insert into the eighth screw hole at the bottom of the insert, and the bottom of the insert abuts against the upper end of the circular boss.

[0023] Furthermore, the four first push rods are inserted through the second circular through holes of the ejector plate and the ejector fixing plate, and the spring is sleeved on the outside. One end of the first push rod abuts against the bottom of the stepped rectangular mounting cavity, and the other end is inserted into the first push rod hole of the core plate; the two second push rods and the four reset rods each include a large end and a small end, the large ends of the second push rod and the reset rod are both arranged in the ejector fixing plate and abut against the ejector plate, the small end of the second push rod is arranged in the second push rod hole of the core plate, and the small end of the reset rod is arranged in the reset hole of the core plate; the insert and the dumbbell-shaped specimen core plate are both provided with a second stepped hole and the angular hole.

[0024] The technical solution of the present application has at least the following advantages and beneficial effects:

[0025] 1. The synchrotron radiation X-ray online research injection mold with fast switching of molding cores provided by the present invention can form dumbbell-shaped specimens and directly be used to measure physical and mechanical properties, so it can be used to conduct research on "processing field-structure-performance";

[0026] 2. The synchrotron radiation X-ray online research injection mold with fast switching of molding cores provided by the present invention can mold thin-walled specimens of different thicknesses, and thus can be used to study the influence of the processing field on the structure and performance of thin-walled sheet plastic parts of different thicknesses;

[0027] 3. The synchrotron radiation X-ray online research injection mold with fast switching of molding cores provided by the present invention can detect in real time the formation and development process of the polymer microstructure under the action of non-equilibrium and nonlinear processing external fields during the injection molding process, and can be used to study important polymer physical phenomena such as multi-scale structural evolution such as polymer crystallization;

[0028] 4. The incident side slider is equipped with a pressure sensor and a temperature sensor that can monitor the pressure and temperature changes in real time. They are connected to the online detection system, so that the melt pressure, temperature and other parameters can be measured and accurately controlled in real time;

[0029] 5. The synchrotron radiation X-ray online research injection mold with fast switching molding core provided by the present invention can quickly realize the preparation of plastic parts with various shapes and thicknesses on the same set of cores due to the existence of switchable core plates and variable thickness inserts, which significantly reduces the production cost of the mold and improves production efficiency. In addition, replaceable core blocks of more shapes can be designed according to user needs, greatly enhancing the flexibility of mold design.

[0030] 6. The synchrotron radiation X-ray online research injection mold capable of quickly switching the molding core provided by the present invention has novel concept, ingenious design and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the main assembly cross-sectional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the side view assembly cross-sectional structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the top view of the assembly structure of the present invention;

[0034] Figure 4 It is a partial schematic diagram of the heating assembly of the present invention;

[0035] Figure 5 It is a schematic diagram of the mold sleeve structure of the present invention;

[0036] Figure 6 It is a schematic diagram of assembling the incident side slider and the exit side slider of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the output side slider of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the slider pad of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the movable mold bottom plate of the present invention;

[0040] Fig.10 This is a schematic diagram of the structure of a fixed bottom plate in the incident side slider mounting cavity of the present invention;

[0041] Fig.11 It is a structural schematic diagram of a fixed plate in the mounting cavity of the incident side slider of the present invention;

[0042] Fig.12This is a schematic diagram of the structure of the top plate, the first top rod and the spring in the cavity of the output side slider installation of the present invention;

[0043] Fig.13 It is a schematic diagram of the structure of the ejector fixing plate, the second ejector and the reset rod installed in the cavity of the ejector slider of the present invention;

[0044] Fig.14 It is a structural schematic diagram of a thin-walled sample mold core plate of the present invention;

[0045] Fig.15 It is a schematic structural diagram of a variable thickness replacement insert of a thin-walled specimen mold core plate of the present invention;

[0046] Fig.16 It is a structural schematic diagram of a dumbbell-shaped specimen mold core plate of the present invention;

[0047] Fig.17 It is a disassembly schematic diagram of the slider on the exit side of the thin-walled sample of the present invention;

[0048] Fig.18 It is a disassembly schematic diagram of the exit side slider of the dumbbell-shaped sample of the present invention;

[0049] Icons: 1. Fixed mold part; 11. Positioning ring; 12. Gate sleeve; 13. Fixed mold bottom plate; 14. Fixed mold plate; 2. Moving mold part; 20. Transparent window; 201. Straight circular hole; 202. Angle hole; 203. Diamond single crystal; 21. Incident side slider; 211. Lug; 212. U-shaped groove; 213. Cooling water channel; 214. Pressure sensor mounting hole; 215. Temperature sensor mounting hole; 216. First screw hole; 22. Exit side slider; 221. Circular boss; 222. Step Circular through hole; 223, stepped rectangular mounting cavity; 224, second screw hole; 23, pressure sensor; 24, temperature sensor; 25, mold sleeve; 251, quadrangular pyramid through hole; 252, guide groove; 253, rectangular groove; 254, elliptical through hole; 255, large guide hole; 256, third screw hole; 257, groove; 26, movable mold assembly; 261, slider pad; 2611, fourth screw hole; 2612, first push rod hole; 2613, guide hole; 262, movable mold bottom plate; 2621 , fifth screw hole; 2622, sixth screw hole; 2623, push plate guide post hole; 2624, second push rod hole; 27, ejection demoulding assembly; 271, push plate guide post; 272, push plate guide sleeve; 273, push rod fixing plate; 274, push plate; 275, push rod; 28, fixing assembly; 281, fixing bottom plate; 282, fixing plate; 29, sample ejection assembly; 291, top plate; 2911, seventh screw hole; 2912, first circular through hole; 292, push rod fixing plate; 2921, second circular shaped through hole; 293, first push rod; 294, spring; 295, second push rod; 296, reset rod; 30, core plate; 301, thin-walled specimen core plate; 3011, first push rod hole; 3012, second push rod hole; 3013, reset hole; 3014, rectangular through hole; 302, insert; 3021, eighth screw hole; 303, dumbbell-shaped specimen core plate; 3, heating assembly; 31, first heating plate; 32, heating coil; 33, second heating plate; 34, heating tube; 35, insulation board. DETAILED DESCRIPTION

[0050] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the detailed description of the specific embodiments of the present invention provided herein is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] Please refer to Figure 1 Fig.18The present invention provides a synchrotron radiation X-ray online research injection mold that can quickly switch the molding core, including a fixed mold part 1, a movable mold part 2 and a heating assembly 3. The movable mold part 2 is located below the fixed mold part 1, and the demolding process of injection molding is completed by adopting an inclined slider parting and a push rod ejection method, including an incident side slider 21 and an exit side slider 22 that are assembled to form an injection cavity.

[0052] Example 1

[0053] Fixed mold part:

[0054] The fixed mold part 1 includes a positioning ring 11 , a sprue bushing 12 , a fixed mold bottom plate 13 and a fixed mold plate 14 .

[0055] A cylindrical hole is provided inside the positioning ring 11 . The head of the positioning ring 11 is installed on the fixed mold plate of the injection molding machine, and the tail is installed in the corresponding circular hole of the fixed mold bottom plate 13 , and is pressed between the fixed mold plate of the injection molding machine and the fixed mold bottom plate 13 .

[0056] The fixed mold bottom plate 13 is located above the fixed mold plate 14, and a heat insulation board 35 is arranged in the middle; the upper part of the sprue sleeve 12 is installed on the fixed mold bottom plate 13, and the lower part passes through the fixed mold plate 14 and the heat insulation board 35. Specifically, the sprue sleeve 12 is a stepped cylindrical structure, the head of which is installed in the cylindrical hole, the shoulder is set on the bottom surface of the positioning ring 11, and the body and legs pass through the fixed mold bottom plate 13, the heat insulation board 35 and the fixed mold plate 14 respectively; the sprue sleeve 12 is provided with a through sprue runner from top to bottom, and the sprue runner includes a hemispherical pit runner at the top, which contacts with the nozzle, and the two are closely matched to prevent the high-pressure plastic melt from overflowing, and the bottom of the pit runner is connected to a truncated cone-shaped main flow channel.

[0057] Example 2

[0058] Moving mold part:

[0059] The movable mold part 2 is located below the fixed mold part 1, and the demolding process of injection molding is completed by the inclined slider parting and the ejection of the ejector rod. It includes an incident side slider 21, an exit side slider 22, a mold sleeve 25, a movable mold plate assembly 26, an ejection demolding assembly 27, a fixed assembly 28, a sample ejection assembly 29 and a core plate 30.

[0060] The incident side slider 21 and the exit side slider 22 are assembled to form an injection cavity, and a transparent window 20 is provided on the side wall of the injection cavity to allow the X-ray beam to pass through without causing interference. The incident part of the synchrotron radiation X-ray is on one side of the moving mold, and the receiving part is on the other side of the moving mold.

[0061] The incident side slider 21 is equipped with a pressure sensor 23 and a temperature sensor 24 that can monitor the pressure and temperature in real time. The pressure sensor 23 and the temperature sensor 24 are connected to the online detection system and can measure and accurately control the melt pressure, temperature and other parameters in real time. The movable plate assembly 26 is located below the mold sleeve 25, and the ejection demolding assembly 27 is located below the movable plate assembly 26. The incident side slider 21 and the exit side slider 22 are ejected upward during demolding.

[0062] A quadrangular pyramid through hole 251 is provided at the center of the mold sleeve 25, a rectangular groove 253 is provided on one side of the mold sleeve 25, and an elliptical through hole 254 is provided on the other side of the mold sleeve 25. The side where the elliptical through hole 254 is located is perpendicular to the side where the rectangular groove 253 is located, and the rectangular groove 253 and the elliptical through hole 254 are both connected to the quadrangular pyramid through hole 251; the side wall where the groove 257 is located is arranged parallel to the side wall where the rectangular groove 253 is located.

[0063] The incident side slider 21 and the exit side slider 22 are assembled to form an injection cavity, and are installed in opposite directions in the quadrangular pyramid through hole 251 of the mold sleeve 25, each of which is provided with a cooling water channel 213, and each of which is provided with a lug 211 that slides in the guide groove 252; the incident side slider 21 is provided with a U-shaped groove 212 and an installation cavity on the side away from the exit side slider 22, and two pairs of pressure sensor installation holes, a temperature sensor installation hole and four first screw holes are provided at the bottom of the installation cavity; the exit side slider 22 is far away from the exit side slider 22. A U-shaped groove 212 and a stepped circular through hole 222 are provided on the side away from the incident side slider 21, and a circular boss 221, a stepped rectangular mounting cavity 223 and a second screw hole 224 are provided on the side in contact with the incident side slider 21. The circular boss 221 is located on the small rectangular groove at the lower end of the stepped rectangular mounting cavity 223, and the small hole at the upper end of the stepped circular through hole 222 passes through the middle of the circular boss 221. Second screw holes 224 are provided at the four corners of the bottom of the large rectangular groove at the upper end of the stepped rectangular mounting cavity 223.

[0064] Four large guide holes 255 and four third screw holes 256 are formed on the upper surface of the mold sleeve 25 . The four large guide holes 255 are respectively located at the four corners of the mold sleeve 25 , and the two third screw holes 256 are respectively located at two sides of the rectangular groove 253 .

[0065] The movable plate assembly 26 is located below the mold sleeve 25, and includes a slider pad 261. The slider pad 261 is provided with a fourth screw hole 2611, a first push rod hole 2612 and a guide hole 2613. The four first push rod holes 2612 are located in the area enclosed by the four fourth screw holes 2611. The movable plate assembly 26 also includes a movable mold bottom plate 262 located below the slider pad 261. The inner end of the movable mold bottom plate 262 is provided with a fifth screw hole 2621, the outer end is provided with a sixth screw hole 2622 and a push plate guide column hole 2623, and the center is provided with a second push rod hole 2624. An ejection cavity is formed between the slider pad 261 and the movable mold bottom plate 262. An ejection demoulding assembly 27 is provided in the ejection cavity. Component 27 includes a push plate guide column 271, a push plate guide sleeve 272, a push rod fixing plate 273, a push plate 274 and a push rod 275. The push plate guide column 271 passes through the bottom of the movable mold base plate 262 and is inserted into the slider pad 261. The push plate 274 is located above the movable mold base plate 262, and the push rod fixing plate 273 is located above the push plate 274; the push plate guide sleeve 272 is sleeved outside the push plate guide column 271, and the two ends of the push plate guide sleeve 272 are respectively embedded in the push rod fixing plate 273 and the push plate 274; the lower end of the push rod 275 passes through the push rod fixing plate 273 and abuts against the upper surface of the push plate 274, and the upper end of the push rod 275 passes through the slider pad 261 and abuts against the lower surface of the incident side slider 21 and the lower surface of the exit side slider 22. In this embodiment, the number of the push rods 275 is at least two, and the push rods 275 at different positions abut against the lower surface of the incident side slider 21 or the exit side slider 22 specifically disposed above them.

[0066] The movable mold part 2 also includes a fixing assembly 28 arranged in the mounting cavity of the incident side slider 21 and a sample ejection assembly 29 and a core plate 30 arranged in the stepped rectangular mounting cavity 223 of the exit side slider 22; the fixing assembly 28 includes a fixing base plate 281 and a fixing plate 282, the fixing base plate 281 and the fixing plate 282 are fixed to the first screw hole 216 of the incident side slider 21 by connecting screws, and both are provided with a straight circular hole 201 located in the middle, and two pairs of pressure sensor mounting holes 214 and temperature sensor mounting holes 215 located on both sides of the straight circular hole 201; the sample ejection assembly 2 The mold core plate 30 includes a top plate 291, a top rod fixing plate 292, a first top rod 293, a spring 294, a second top rod 295 and a reset rod 296. The top plate 291 and the ejection fixing plate 292 are connected by four seventh screw holes 2911. The upper and lower ends are respectively provided with an angle hole 202 and a first circular through hole 2912. The first circular through hole 2912 is sleeved on a circular boss 221 in the middle of a small rectangular groove at the lower end of the stepped rectangular mounting cavity 223. The mold core plate 30 is fixed to the large rectangular groove at the upper end of the stepped rectangular mounting cavity 223 of the exit side slider 22 by the second screw hole 224. Two movable The replaceable core plate includes a thin-walled sample core plate 301 and a dumbbell-shaped sample core plate 303. A rectangular through hole 3014 is provided in the middle of the thin-walled sample core plate 301 for installing a replacement insert 302 of variable thickness. A connecting screw is passed through the stepped circular through hole 222 and inserted into the eighth screw hole 3021 at the bottom of the insert 302. The bottom of the insert 302 abuts against the upper end of the circular boss 221. Four first ejector rods 293 penetrate and are inserted into the second circular through holes 2921 of the ejector plate 291 and the ejector fixing plate 292. A spring 294 is provided on the outside. One end of the first ejector rod 293 is connected to the stepped circular through hole 222. The bottom of the rectangular mounting cavity 223 is abutted, and the other end is inserted into the first push rod hole 3011 of the core plate 30; the two second push rods 295 and the four reset rods 296 all include a large end and a small end, the large ends of the second push rods 295 and the reset rods 296 are both arranged in the ejection fixing plate 292 and abut against the top plate 291, the small end of the second push rod 295 is arranged in the second push rod hole 3012 of the core plate 30, and the small end of the reset rod 296 is arranged in the reset hole 3013 of the core plate 30; the second step hole and the angular hole 202 are both arranged on the insert 302 and the dumbbell-shaped specimen core plate 303. In this embodiment, the core plate 30 can be quickly replaced to prepare polymer injection molding samples of different shapes, and the insert 302 can also be quickly replaced to prepare polymer injection molding samples of different thicknesses. When used in conjunction with synchrotron radiation X-rays, polymer physics problems such as crystallization and phase morphology evolution of polymer injection molding samples of different shapes and thicknesses under non-equilibrium and nonlinear processing fields can be studied, thereby guiding the actual processing and production of polymer injection molding.

[0067] Example 3

[0068] Heating components:

[0069] The heating assembly 3 includes a first heating plate 31, a heat insulating plate 35 and a second heating plate 33. The mold sleeve 25 is connected to the first heating plate 31, and the heat insulating plate 35 and the second heating plate 33 are arranged below the fixed mold bottom plate 13; the first heating plates 31 are arranged on the top, bottom, left and right sides of the mold sleeve 25, and a heating tube 34 is arranged through the first heating plates 31 arranged at the top and bottom positions of the mold sleeve 25, and a heating coil 32 is arranged on the first heating plates 31 arranged at the left and right positions of the mold sleeve 25; a groove 257 is opened on the outer wall of the mold sleeve 25, and the groove 257 is arranged to place the second heating plate 33. In this embodiment, the heating assembly 3 is used to accurately control the mold temperature of injection molding.

[0070] The specific working process of the present invention is as follows: first, start the synchrotron radiation X-ray scattering experimental station to ensure that the radiation power supply and the X-ray signal receiving detector work normally. Heat the screw of the injection molding machine and the synchrotron radiation X-ray online research injection mold designed by the present invention that can quickly switch the molding core, and wait until the screw temperature and the mold temperature rise to the set temperature of the processed material, keep warm for more than half an hour, and then enter the injection molding stage. The molten material from the nozzle of the injection molding machine flows into the injection cavity composed of the incident side slider 21 and the exit side slider 22 through the flow channel in the center of the gate sleeve 12. After the mold filling is completed, the injection molding machine continues to apply a certain pressure (holding pressure) to compensate for the shrinkage of the material during the cooling process to ensure the dimensional accuracy and surface quality of the product. Subsequently, the molten material gradually cools and solidifies in the mold.

[0071] During the entire injection molding process, the synchrotron radiation X-ray source on one side of the moving mold emits X-rays, and the synchrotron radiation X-ray receiving detector on the other side of the moving mold collects the scattered signals after the X-rays penetrate the sample. This enables real-time detection of the formation and development of the microstructure of polymer products at each stage of mold filling, pressure holding, and cooling during the injection molding process; at the same time, the pressure sensor 23 and the temperature sensor 24 respectively monitor and record the pressure and temperature changes of the polymer melt during the entire processing process, and display them in real time through the online detection system.

[0072] In the demolding stage, the movable mold part 2 first leaves the fixed mold part 1, and the incident side slider 21 and the exit side slider 22 cannot move sideways in the initial stage of mold opening, so they are left together on the side of the movable mold part 2. After the movable mold part 2 and the fixed mold part 1 are separated, the ejector rod of the injection molding machine passes through the second push rod hole 2624 to apply force to the push plate 274, and the push plate 274 applies force to the injection mold push rod 275, and the push rod 275 pushes out the incident side slider 21 and the exit side slider 22. During the ejection stage, the lugs 211 on the sides of the incident side slider 21 and the exit side slider 22 slide in the guide groove 252 of the mold sleeve 25, so that the incident side slider 21 and the exit side slider 22 are separated laterally while being ejected forward. At the same time, as the sliders are obliquely parted, the first ejector rod 293 located in the stepped rectangular mounting cavity 223 of the exit side slider 22 pushes the ejector plate 291 to move forward, and the ejector plate 291 then pushes the second ejector rod 295 and the reset rod 296 arranged in the ejection fixing plate 292 forward, so that the second ejector rod 295 ejects the plastic part until the plastic part is separated from the incident side slider 21 and the exit side slider 22 by a sufficient distance and falls out of the mold from the rectangular groove 253 of the mold sleeve 25 and enters the sample collection device.

[0073] Example 4

[0074] It should be noted that, in the mold closing stage, as the incident side slider 21 and the exit side slider 22 slide back into the mold sleeve, the first ejector rod 293, the second ejector rod 295, the ejector plate 291 and the ejection fixing plate 292 are also reset under the action of the spring. At the same time, the four reset rods 296 return the entire sample ejection assembly 29 to its initial position.

[0075] As an optimization scheme of this embodiment, the core plate 30 can be designed with molding cores of different shapes according to needs, such as the preparation of rectangular, circular and other specimens. It has the advantages of flexible and convenient switching, convenient processing, and low production cost. It can meet the needs of different usage scenarios and synchrotron radiation X-ray in-situ research of injection molded samples of different shapes. The design scheme of dumbbell-shaped and thin-walled molding cores is demonstrated in this embodiment.

[0076] As an optimization scheme of this embodiment, the insert 302 of the thin-walled specimen mold core plate is small in size and easy to process, and can be made into replacement inserts of different thicknesses. The insert 302 can be quickly replaced by removing the connecting screws located in the stepped circular through hole 222 of the exit-side slider 22 and the eighth screw hole 3021 of the insert 302, thereby meeting the needs of preparing and synchrotron radiation X-ray in-situ research on injection-molded thin-walled specimens of different thicknesses.

[0077] As an optimization scheme of this embodiment, a pressure sensor 23 for real-time pressure monitoring and a temperature sensor 24 for temperature monitoring are respectively provided in the middle of the sample and near the gate runner. The pressure and temperature sensors are separated to improve the accuracy of monitoring processing parameters such as pressure and temperature. At the same time, the pressure drop and temperature change of the sample near the gate runner end and the middle can be accurately calculated to verify with the synchrotron radiation X-ray in situ scattering data of the polymer microstructure evolution.

[0078] In this embodiment, Fig.17 and Fig.18 Detailed schematic diagrams of the disassembly of the exit-side sliders of the thin-walled specimen and the dumbbell-shaped specimen of the present invention are respectively shown, which facilitates the understanding of the disassembly-replacement process of the quickly detachable mold core of the present invention.

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A synchrotron radiation X-ray online research injection mold capable of quickly switching molding cores, characterized in that: include: A fixed mold part (1), a movable mold part (2) and a heating assembly (3), wherein the movable mold part (2) is located below the fixed mold part (1), and a demoulding process of injection molding is completed by using an inclined slider parting and a push rod to eject, comprising an incident side slider (21) and an exit side slider (22) which are assembled to form an injection cavity, and a transparent window (20) is provided on the side wall of the injection cavity to allow an X-ray beam to pass through without causing interference; the transparent window (20) comprises a straight circular hole (201) and a first stepped hole located in the incident side slider (21), and a second stepped hole and an angled hole (202) located in the exit side slider (22) which are connected in sequence; a high temperature and high pressure resistant diamond single crystal (203) is installed in both the first stepped hole and the second stepped hole, and the angled hole (202) has an angle of 20°.

2. The mold according to claim 1, characterized in that A pressure sensor (23) and a temperature sensor (24) capable of monitoring pressure and temperature in real time are respectively installed on the incident side slider (21).

3. The mold according to claim 1, characterized in that The fixed mold part (1) comprises a positioning ring (11), a sprue bushing (12), a fixed mold bottom plate (13) and a fixed mold plate (14); The positioning ring (11) is provided with a penetrating cylindrical hole therein, is mounted on the fixed mold bottom plate (13) and is pressed onto the top of the sprue sleeve (12); the upper portion of the sprue sleeve (12) is mounted on the fixed mold bottom plate (13), and the lower portion passes through the fixed mold plate (14); the fixed mold bottom plate (13) is located above the fixed mold plate (14), and a heat insulation plate (35) is provided in the middle; The gate sleeve (12) is a stepped cylindrical structure, the head of which is installed in the cylindrical hole, the shoulder is topped with the bottom surface of the positioning ring (11), and the body and legs pass through the fixed mold bottom plate (13), the heat insulation plate (35) and the fixed mold plate (14) respectively; the gate sleeve (12) is provided with a through gate flow channel from top to bottom, including a hemispherical pit flow channel at the top and a truncated cone-shaped main flow channel connected to the bottom end of the pit flow channel.

4. The mold according to claim 1, characterized in that The movable mold part (2) comprises a mold sleeve (25), a movable mold plate assembly (26) and an ejection demoulding assembly (27); The incident side slider (21) and the exit side slider (22) are installed in the mold sleeve (25), the movable mold plate assembly (26) is located below the mold sleeve (25), and the ejection demolding assembly (27) is located below the movable mold plate assembly (26). When demolding, the incident side slider (21) and the exit side slider (22) are ejected upward.

5. The mold according to claim 1, characterized in that The heating assembly (3) comprises a first heating plate (31), a heat insulating plate (35) and a second heating plate (33); the mold sleeve (25) is connected to the first heating plate (31); and the heat insulating plate (35) and the second heating plate (33) are arranged below the fixed mold bottom plate (13); The mold sleeve (25) is provided with the first heating plates (31) at the top, bottom, left and right sides thereof; a heating tube (34) is provided through the first heating plates (31) provided at the top and bottom sides thereof; and a heating coil (32) is provided around the first heating plates (31) provided at the left and right sides thereof; A groove (257) is provided on the outer side wall of the mold sleeve (25), and the groove (257) is configured to place the second heating plate (33).

6. The mold according to claim 4, characterized in that A quadrangular pyramid through hole (251) is provided at the center of the mold sleeve (25), a rectangular groove (253) is provided on one side of the mold sleeve (25), and an elliptical through hole (254) is provided on the other side of the mold sleeve (25), the side where the elliptical through hole (254) is located is perpendicular to the side where the rectangular groove (253) is located, and the rectangular groove (253) and the elliptical through hole (254) are both connected to the quadrangular pyramid through hole (251); the side wall where the groove (257) is located is arranged parallel to the side wall where the rectangular groove (253) is located; The incident side slider (21) and the exit side slider (22) are installed in the quadrangular pyramid through hole (251) in a back-to-back manner, and their vertical cross-sections along the left and right directions are both right-angled trapezoidal surfaces, and cooling water channels (213) are provided therein, and lugs (211) are provided thereon for sliding in the guide groove (252); A U-shaped groove (212) and a mounting cavity are provided on a side of the incident side slider (21) away from the exit side slider (22); two pairs of pressure sensor mounting holes (214), a temperature sensor mounting hole (215) and four first screw holes (216) are provided at the bottom of the mounting cavity; A U-shaped groove (212) and a stepped circular through hole (222) are provided on a side of the output side slider (22) away from the incident side slider (21), and a circular boss (221), a stepped rectangular mounting cavity (223) and a second screw hole (224) are provided on a side in contact with the incident side slider (21); the circular boss (221) is located on a small rectangular groove at the lower end of the stepped rectangular mounting cavity (223); a small hole at the upper end of the stepped circular through hole (222) passes through the middle of the circular boss (221); and the second screw holes (224) are provided at four corners of the bottom of the large rectangular groove at the upper end of the stepped rectangular mounting cavity (223).

7. The mold according to claim 6, characterized in that The upper surface of the mold sleeve (25) is provided with four large guide holes (255), and the four large guide holes (255) are respectively located at the four corners of the mold sleeve (25); The upper surface of the mold sleeve (25) is also provided with four third screw holes (256), wherein two of the third screw holes (256) are respectively located on two sides of the rectangular groove (253).

8. The mold according to claim 4, characterized in that The movable platen assembly (26) comprises a slider pad (261), the slider pad (261) is provided with a fourth screw hole (2611), a first push rod hole (2612) and a guide hole (2613), and the four first push rod holes (2612) are located in an area enclosed by the four fourth screw holes (2611); The movable die plate assembly (26) further comprises a movable die bottom plate (262) located below the slider pad (261), the movable die bottom plate (262) having a fifth screw hole (2621) at its inner end, a sixth screw hole (2622) and a push plate guide post hole (2623) at its outer end, and a second push rod hole (2624) at its center, and an ejection cavity is formed between the slider pad (261) and the movable die bottom plate (262); The ejection demoulding assembly (27) is located in the ejection cavity, and the ejection demoulding assembly (27) comprises a push plate guide column (271), a push plate guide sleeve (272), a push rod fixing plate (273), a push plate (274) and a push rod (275); The push plate guide column (271) passes through the bottom of the movable mold bottom plate (262) and is inserted into the slider pad (261); the push plate (274) is located above the movable mold bottom plate (262); and the push rod fixing plate (273) is located above the push plate (274); The push plate guide sleeve (272) is opened outside the push plate guide column (271), and the two ends of the push plate guide sleeve (272) are respectively embedded in the push rod fixing plate (273) and the push plate (274); the lower end of the push rod (275) passes through the push rod fixing plate (273) and abuts against the upper surface of the push plate (274), and the upper end of the push rod (275) passes through the slider pad (261) and abuts against the lower surface of the incident side slider (21) and the lower surface of the exit side slider (22).

9. The mold according to claim 4, characterized in that: The movable mold part (2) also includes a fixing assembly (28), a sample ejection assembly (29) and a core plate (30); The fixing assembly (28) is arranged in the mounting cavity of the incident side slider (21), and comprises a fixing base plate (281) and a fixing plate (282); the fixing base plate (281) and the fixing plate (282) are fixed in a first screw hole (216) of the incident side slider (21) by connecting screws, and both are provided with a straight circular hole (201) in the middle, and two pairs of pressure sensor mounting holes (214) and temperature sensor mounting holes (215) located on both sides of the straight circular hole (201); The sample ejection assembly (29) is arranged in the stepped rectangular installation cavity (223) of the exit side slider (22), and comprises a top plate (291), a ejector fixing plate (292), a first ejector (293), a spring (294), a second ejector (295) and a reset rod (296); the top plate (291) and the ejection fixing plate (292) are connected via four seventh screw holes (2911); the upper and lower ends are respectively provided with the angular hole (202) and the first circular through hole (2912); the first circular through hole (2912) is sleeved on the circular boss (221) in the middle of the small rectangular groove at the lower end of the stepped rectangular installation cavity (223).

10. The mold according to claim 9, characterized in that The core plate (30) is fixed to the large rectangular groove at the upper end of the stepped rectangular installation cavity (223) of the exit side slider (22) through the second screw hole (224). Two replaceable core plates are provided, including a thin-walled sample core plate (301) and a dumbbell-shaped sample core plate (303). A rectangular through hole (3014) is provided in the middle of the thin-walled sample core plate (301) for installing a replacement insert (302) with a variable thickness. A connecting screw is passed through the stepped circular through hole (222) and inserted into the eighth screw hole (3021) at the bottom of the insert (302). The bottom of the insert (302) abuts against the upper end of the circular boss (221). The four first ejector rods (293) are inserted into the second circular through holes (2921) of the ejector plate (291) and the ejector fixing plate (292), and the spring (294) is sleeved on the outside. One end of the first ejector rod (293) abuts against the bottom of the stepped rectangular installation cavity (223), and the other end is inserted into the first ejector rod hole (3011) of the core plate (30). The two second ejector rods (295) and the four reset rods (296) each include a large end and a small end. The second ejector rods (295) The large ends of the second ejector pin (295) and the reset pin (296) are both arranged in the ejection fixing plate (292) and abut against the ejector plate (291); the small end of the second ejector pin (295) is arranged in the second ejector pin hole (3012) of the core plate (30); and the small end of the reset pin (296) is arranged in the reset hole (3013) of the core plate (30); the insert (302) and the dumbbell-shaped specimen core plate (303) are both provided with a second stepped hole and the angular hole (202).

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