A micro-injection integrated testing machine for metal-plastic interface coated parts

Abstract

The application discloses a kind of metal-plastic interface coating workpiece micro-injection integrated testing machine, including testing machine mould, and integrated in mould in-mould pressure and temperature detection system, ultrasonic vibration system and mechanical vibration system;Two vibration systems are oppositely arranged between fixed mould plate and movable mould plate, and metal-plastic sample cavity and standard tensile sample cavity are simultaneously provided on rear mould core, needle hole, convex pad, sample metal part positioning block and tail positioning needle are provided in metal-plastic sample cavity;In-mould pressure and temperature detection system includes three temperature sensors and three pressure sensors, which are one-to-one corresponding, two temperature and pressure sensors are arranged at different points of flow channel on the side of standard tensile sample cavity, and the other is arranged in the cavity of metal-plastic sample.The sensor is integrated in mould, and the in-mould temperature of coating workpiece, in-mould pressure, vibration applied multivariate integrated test can be realized on a set of testing machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection molding, in particular to a micro-injection integrated test machine for metal-plastic interface coated parts. BACKGROUND

[0002] Insert injection molding is an advanced plastic processing technology, its basic principle is to fix one or more auxiliary materials (metal, plastic or ceramic parts) in the injection mold in advance, then inject molten plastic material to cover and fix the insert, after opening the mold, the insert is wrapped by the cooled and solidified plastic to form a composite part. In the secondary processing and subsequent use of metal-plastic parts, such as stamping, cutting, long-time operation of the part in high-temperature environment, radiation environment and cyclic load, will cause the composite part to fail due to interface separation. The test sample for metal-plastic interface coating is prone to occur the situation that the interface is not damaged but the plastic breaks first during testing. Different coating areas need to be determined for different plastics to replace different molds, and the research process is complex, difficult and high-cost. At the same time, only the temperature, pressure and the difference between plastic and metal can be controlled, and other factors affecting the metal-plastic interface coating are ignored. So far, there is no related report on the injection metal-plastic interface coating test device integrating in-mold pressure detection, in-mold temperature detection and in-mold vibration. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a micro-injection integrated test machine for metal-plastic interface coated parts. The integrated test machine accurately monitors the temperature / pressure parameters of the molding process by setting high-precision micro temperature / pressure sensors in the mold cavity, avoiding the error between the set temperature / pressure of the machine and the actual data caused by energy dissipation during the molding process, and the obtained data is more conducive to the accurate analysis of the metal-plastic interface coating effect. The in-mold mechanical / ultrasonic vibration system applies high-frequency / low-frequency combined vibration to the polymer melt flowing through the runner during the molding process, which improves the metal-plastic interface coating effect by affecting the uniformity and microstructure of the polymer melt. The test machine can be used to study the influencing factors and optimization methods of metal-plastic composite part interface coating under injection molding process. The specific technical solutions are as follows:

[0004] A micro-injection integrated test machine for metal-plastic interface coated parts, comprising a test machine mold, and an in-mold pressure and temperature detection system, an ultrasonic vibration system and a mechanical vibration system integrated in the test machine mold;

[0005] The test machine mold comprises a fixed mold bottom plate, a fixed mold plate, a front mold core, a rear mold core, a movable mold plate, an upper ejector plate, a square iron, a lower ejector plate, an ejector pin, a movable mold bottom plate; The middle part of the fixed mold plate and the movable mold plate after clamping is provided with a runner;

[0006] The ultrasonic vibration system and the mechanical vibration system are arranged oppositely between the fixed mold plate and the movable mold plate.

[0007] The back mold core is provided with a metal-plastic sample mold cavity and a standard tensile sample mold cavity, the metal-plastic sample mold cavity is provided with a ejector pin hole, a raised pad, a sample metal part positioning block and a tail positioning needle, the raised pad is used for supporting the metal part of the metal-plastic interface coated part, so that the melt can coat the metal part, the sample metal part positioning block is used for limiting the width direction of the metal part of the metal-plastic interface coated part, and the tail positioning needle is installed at the tail of the metal-plastic sample mold cavity and used for limiting the length direction of the metal part of the metal-plastic interface coated part.

[0008] The in-mold pressure and temperature detection system comprises in-mold temperature sensor one, in-mold temperature sensor two, in-mold temperature sensor three, in-mold pressure sensor one, in-mold pressure sensor two, in-mold pressure sensor three, a data joint, a precision calibrator and a data acquisition terminal, the in-mold temperature sensor one, the in-mold temperature sensor two, the in-mold temperature sensor three and the in-mold pressure sensor three are all installed on the front mold core, the in-mold pressure sensor one and the in-mold pressure sensor two are installed on the back mold core, the in-mold temperature sensor one and the in-mold temperature sensor two are arranged at different points of the flow channel on the side of the standard tensile sample mold cavity and used for measuring the temperature changes at different distances from the glue inlet, the in-mold temperature sensor three is arranged in the metal-plastic sample mold cavity and used for monitoring the temperature state in the metal-plastic sample mold cavity, the pressure sensor one and the pressure sensor two are arranged at different points of the flow channel on the side of the standard tensile sample mold cavity, the pressure sensor one corresponds to the in-mold temperature sensor one in position, the pressure sensor two corresponds to the in-mold temperature sensor two in position, the pressure sensor three is fixed in the metal-plastic sample mold cavity and arranged symmetrically with the temperature sensor three and used for monitoring the pressure state in the metal-plastic sample mold cavity, each sensor is connected to the data joint, the precision calibrator and the data acquisition terminal through a single wire cable in turn, the collected temperature or pressure data is arranged and analyzed by the data acquisition terminal, and process optimization suggestions are given.

[0009] Further, the testing machine mold further comprises a mechanical vibration guide block and an ultrasonic vibration guide block, the mechanical vibration guide block and the ultrasonic vibration guide block are oppositely arranged and both are fixed on the back mold core, and the flow channel is located between the mechanical vibration guide block and the ultrasonic vibration guide block.

[0010] Further, the fixed mold plate, the front mold core, the movable mold plate and the rear mold core are provided with sensor fixing holes, and the fixed mold plate and the movable mold plate are fixedly connected with sensor pressing plates, so that the axial movement of all the film internal temperature sensors and pressure sensors is limited by the front mold core, the rear mold core and the sensor pressing plates.

[0011] Further, the mechanical vibration system comprises a voice coil motor, a sleeve, a connecting rod and a mechanical vibration block, the voice coil motor is placed in the sleeve, the voice coil motor is fixedly connected with the connecting rod, the connecting rod is connected with the mechanical vibration block arranged near the flow channel in the mold cavity in cooperation; the sleeve and the voice coil motor are fixed on the surface of the testing machine mold; the mechanical vibration block keeps stable axial movement through the mechanical vibration guide blocks fixed on both sides, and low-frequency high-amplitude vibration is applied to the melt flowing through the flow channel.

[0012] Further, the ultrasonic vibration system comprises an ultrasonic vibration generator, a gasket, a fixing block and an ultrasonic vibration block connected in sequence, the fixing block is fixed on the surface of the testing machine mold, the ultrasonic vibration block is fixedly connected with the ultrasonic vibration generator, and the ultrasonic vibration block is arranged near the flow channel in the mold cavity and symmetrical with the mechanical vibration block, so that high-frequency low-amplitude vibration is applied to the melt flowing through the flow channel.

[0013] Further, in the testing machine mold, the fixed mold plate is fixed on the fixed mold base plate, the front mold core is fixed on the fixed mold plate, the rear mold core is fixed on the movable mold plate, the upper ejector plate and the lower ejector plate are fixed together, the ejector pin is fixed between the upper ejector plate and the lower ejector plate and penetrates upward through the movable mold plate, and the square iron is fixed between the movable mold plate and the movable mold base plate.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. The micro-injection integrated testing machine for metal-plastic interface coated parts provided by the present application can realize continuous adjustment of the coating area within a certain range by changing the length of the metal insert penetrating into the plastic during the injection molding process, can be used for testing the interface coating strength and interface failure form of various materials under the injection molding process, improves the experimental efficiency, and reduces the sample preparation cost.

[0016] 2. The micro-injection integrated testing machine for metal-plastic interface coated parts provided by the present application can simultaneously prepare heterogeneous interface coated samples and pure plastic tensile samples, improves the sample preparation efficiency, and the two samples are prepared in the same mold, which is beneficial to controlling variables.

[0017] 3. The present application can be used to study the mechanism of the effect of vibration, temperature and pressure on the bonding form and strength of the plastic-metal interface under the condition of injection molding process by simultaneously integrating the in-mold temperature detection system, in-mold pressure detection system, mechanical vibration system and ultrasonic vibration system in the testing machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a metal-plastic interface coated sample.

[0019] Figure 2 is a schematic diagram of the whole testing machine.

[0020] Figure 3 is a main sectional view of the testing machine.

[0021] Figure 4 is an exploded view of the mold pin of the testing machine.

[0022] Figure 5 is a schematic diagram of the sensor fixing structure of the testing machine.

[0023] Figure 6 is a schematic diagram of the sensor distribution.

[0024] Figure 7 is a schematic diagram of the sensor interface.

[0025] Figure 8 is a schematic diagram of the arrangement position of the ultrasonic vibration system 4 and the mechanical vibration system 5.

[0026] Figure 9 is a schematic diagram of the principle of the in-mold pressure and temperature detection system 3.

[0027] Figure 10 is a schematic diagram of the structure of the mechanical vibration system.

[0028] Figure 11 is a schematic diagram of the installation position of the mechanical vibration guide block.

[0029] Figure 12 is a schematic diagram of the structure of the ultrasonic vibration system.

[0030] The test sample 1, the testing machine mold 2, the in-mold pressure and temperature detection system 3, the ultrasonic vibration system 4, and the mechanical vibration system 5 in the figure; 101-plastic part, 102-metal part, 103-standard tensile sample; 201-fixed mold bottom plate, 202-fixed mold plate, 203-front mold core, 204-runner, 205-back mold core, 206-moving mold plate, 218-upper ejector plate, 207-square iron, 208-lower ejector plate, 209-moving mold bottom plate, 210-standard tensile sample mold cavity, 211-ejector pin, 212-sensor pressure plate, 213-sensor wire slot, 214-sample metal part tail shape positioning pin, 215-sample metal part positioning block, 216-ejector pin hole, 217-protruding pad, 219-ultrasonic vibration guide block, 220-sensor fixing hole, 221-mechanical vibration guide block; the in-mold pressure / temperature detection system comprises: 301-temperature sensor one, 302-temperature sensor two, 303-data joint, 304-precision calibrator, 305-data acquisition terminal, 306-pressure sensor one, 307-pressure sensor two, 308-temperature sensor three, 309-pressure sensor three; 401-ultrasonic vibration generating rod, 402-gasket, 403-fixing block, 404-ultrasonic vibration block; 501-sleeve, 502-voice coil motor, 503-connecting rod, 504-mechanical vibration block. DETAILED DESCRIPTION

[0031] The purpose and effect of the present application will become more apparent from the following detailed description of the present application according to the accompanying drawings and preferred embodiments, and the present application will be further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] As shown in the figure, the sample and testing machine system for studying the metal-plastic interface coating under the injection molding process of the present application comprises a test sample, a testing machine mold, an in-mold pressure detection system, an in-mold temperature detection system, a mechanical vibration system, and an ultrasonic vibration system.

[0033] As Figure 1As shown, the sample 1 includes a GB / T 37426-2019 standard tensile sample 103 and a metal-plastic interface coated sample, which is composed of a metal part 102 and a plastic part 101. The front end of the metal part 102 is wrapped by the plastic part 101, and a symmetric circular hole 104 with a radius of 1 mm is formed at the exposed end of the metal part 102 for positioning and fixing the metal part 102 when preparing the metal-plastic interface coated sample in the testing machine. The metal part 102 has different lengths to adjust the length of the metal-plastic bonding part. By adjusting the length of the metal insert, the metal-plastic coating area is continuously adjustable. The sample is provided with a U-shaped groove with a length of about 7 mm and a width of about 1 mm on both sides of the bonding part of the metal and the plastic, which is used to fix the metal insert without displacement and bending when the polymer melt fills the mold. Different lengths of inserts can be selected for different materials to avoid the situation that the plastic strength is lower than the bonding surface strength and the experimental purpose cannot be achieved, and to ensure that the metal-plastic bonding surface is damaged in the subsequent tensile test of the metal-plastic interface coated sample, the stress-strain curve of the sample is obtained, and the microscale observation of the damage interface is obtained.

[0034] As shown in Figure 2 , 3 , the testing machine mold 2 includes a fixed mold bottom plate 201, a fixed mold plate 202, a front mold core 203, a flow channel 204, a rear mold core 205, a movable mold plate 206, an upper ejector plate 218, an ejector pin 211, a square iron 207, a lower ejector plate 208, a movable mold bottom plate 209, an ultrasonic vibration guide block 219, a mechanical vibration guide block 221, an in-mold temperature detection system, an in-mold pressure detection system, a mechanical vibration system 5, an ultrasonic vibration system 4. The fixed mold plate 202 is fixed on the fixed mold bottom plate 201, the front mold core 203 is fixed on the fixed mold plate 202, the rear mold core 205 is fixed on the movable mold plate 206, the upper ejector plate 218 and the lower ejector plate 208 are fixed together by bolts, the ejector pin 211 is fixed between the upper ejector plate 218 and the lower ejector plate 208 and passes through the movable mold plate 206 upward. The square iron 207 is fixed between the movable mold plate 206 and the movable mold bottom plate 209.

[0035] As shown in Figure 3 , the mechanical vibration system 5 and the ultrasonic vibration system 4 are relatively installed between the fixed mold plate 202 and the movable mold plate 206. As shown in Figure 4 and 5 , the in-mold temperature sensor one 301, the in-mold temperature sensor two 302, the in-mold temperature sensor three 308, and the in-mold pressure sensor one 306, the in-mold pressure sensor two 307, and the in-mold pressure sensor three 309 are fixed on the front mold core 203 and the rear mold core 205, respectively. From Figure 4It can be seen that in this embodiment, the in-mold temperature sensor one 301, the in-mold temperature sensor two 302, the in-mold temperature sensor three 308 and the in-mold pressure sensor three 309 are all installed on the front mold core 203, and the in-mold pressure sensor one 306 and the in-mold pressure sensor two 307 are installed on the rear mold core 205.

[0036] The rear mold core 205 is provided with a metal-plastic sample mold cavity and a standard tensile sample mold cavity 210. The metal-plastic sample mold cavity is provided with a ejector pin hole 216, a convex pad 217, a sample metal part positioning block 215 and a tail positioning pin 214. An ultrasonic vibration guide block 219 and a mechanical vibration guide block 221 are oppositely arranged and both are fixed on the rear mold core 205. The flow channel 204 is located between the mechanical vibration guide block 221 and the ultrasonic vibration guide block 219. The convex pad 217 is used to support the metal part of the metal-plastic interface coated part, so that the melt can coat the metal part to form a metal insert. The sample metal part positioning block 215 is used to limit the width direction of the metal part of the metal-plastic interface coated part; the tail positioning pin 214 is installed at the tail of the metal-plastic sample mold cavity, and is used to limit the length direction of the metal part of the metal-plastic interface coated part. As shown in Figure 6 As shown in

[0037] As shown in Figures 7-9 In order to realize temperature and pressure measurement, the in-mold pressure and temperature detection system 3 includes a temperature detection unit and a pressure detection unit. The temperature detection unit includes the in-mold temperature sensor one 301, the in-mold temperature sensor two 302, the in-mold temperature sensor three 308 and the in-mold pressure sensor one 306, the in-mold pressure sensor two 307 and the in-mold pressure sensor three 309, in addition to a data connector 303, a precision calibrator 304 and a data acquisition terminal 305 connected through a single-wire cable. Among them, as shown in Figure 7As shown, temperature sensor one 301 and temperature sensor two 307 are arranged at different points of the standard sample side flow channel to measure the temperature changes at different distances from the glue inlet. Temperature sensor three 308 is arranged in the metal-plastic sample cavity to monitor the temperature state in the cavity. Pressure sensor one 306 and pressure sensor two 307 are arranged at different points of the standard sample side flow channel, and pressure sensor three 309 is fixed in the metal-plastic interface coating sample side cavity, symmetrically arranged with temperature sensor three 308, to monitor the pressure state in the cavity. The pressure sensor arrangement points correspond to the temperature sensor points one by one, for measuring the pressure changes at different distances from the glue inlet in the flow channel. Temperature sensors and pressure sensors are arranged at the same point at the same time to achieve the purpose of monitoring the temperature and pressure data of the same point at the same time. The sensor probe diameter is 1mm, which is flush with the inner surface of the cavity and directly contacts the melt. The collected temperature and pressure data are transmitted to the data acquisition terminal 305 through the single-wire connection cable and the matching multi-channel data connector 303, and then through the matched precision calibrator 304. The data acquisition terminal 305 processes and analyzes the obtained data and gives process optimization suggestions.

[0038] As shown in Figure 10 , the mechanical vibration system 5 includes a voice coil motor 502, a sleeve 501, a connecting rod 503, and a mechanical vibration block 504. The voice coil motor 502 is placed in the sleeve 501 and connected to the connecting rod 503 through bolts. The connecting rod 503 is connected to the mechanical vibration block 504 arranged in the cavity. The sleeve 501 and the voice coil motor 502 are fixed on the surface of the mold through bolts. Figure 11 As shown in Figure 12 , the ultrasonic vibration system 4 includes an ultrasonic vibration generator 401, a gasket 402, a fixed block 403, and an ultrasonic vibration block 404 connected in sequence. The fixed block 403 is fixed on the surface of the mold through cooperation and threaded connection. The ultrasonic vibration block 404 is connected to the ultrasonic vibration generator 401 through threaded connection. The ultrasonic vibration block 404 is arranged near the flow channel 204 in the cavity and is symmetric with the mechanical vibration block 504. The ultrasonic vibration generator 401 is connected to an external power supply and a controller. The ultrasonic vibration system 4 and the mechanical vibration system 5 are symmetrically distributed on both sides of the flow channel 204 to apply two-dimensional composite vibration to the melt flowing through the flow channel 204. The mechanical vibration system 5 applies low-frequency high-amplitude vibration to the polymer melt flowing through the flow channel, which can accelerate the process of polymer disentanglement. The ultrasonic vibration system 4 applies high-frequency low-amplitude vibration to the polymer melt flowing through the flow channel 204, which can make the polymer orient as a whole. Both can be applied simultaneously or separately to affect the heterogeneous coating interface through disentanglement and overall orientation of the polymer chain.

[0039] The working process of the metal-plastic interface coating tester of the present application is as follows:

[0040] S1: heat the temperature of the tester mold 2 to 90-110℃;

[0041] S2: start the mechanical vibration system 5 and the ultrasonic vibration system 4, and set the vibration amplitude and vibration frequency respectively;

[0042] S3: connect the in-mold pressure and temperature detection system 3 to the data acquisition terminal, and calibrate the current temperature and pressure;

[0043] S4: adjust the injection molding machine process parameters, for example, using polymer material LCP VT94HT, such as: injection speed 180mm / s, holding time 0.5s, melt temperature 345℃, holding pressure 50MPa, etc., place the insert and set to semi-automatic mode;

[0044] S5: close the mold and start the injection molding process, after completing the injection and holding stages, open the mold to take out the sample and check whether the sample is normal and usable, whether the in-mold pressure and temperature detection system 3, the mechanical vibration system 5 and the ultrasonic vibration system 4 are working normally. After checking, start the full-automatic mode;

[0045] S6: after orthogonal test on the injection speed (150-180mm / s), holding time (0.3-0.8s), melt temperature (300-345℃), holding pressure (30-80MPa) and other process parameters and external vibration conditions, perform tensile test on the interface coating sample and the pure plastic sample taken out, and obtain the stress-strain curve of the sample. At the same time, place the fracture of the sample in the scanning electron microscope (SEM) observation port to observe the micro-morphology of the surface and compare the artificial cut-off notch at the coating position;

[0046] S7: according to the test and micro-characterization results, evaluate the quality of the interface coating, combine the test variables, establish a material parameter-process parameter-external condition-actual parameter-coating quality database, use deep learning method to train the data and determine the influence factor of each factor, provide support for subsequent test, and so on. Finally, the model can give the optimal injection molding machine process parameters according to the material parameters, actual process parameters and external conditions, with the goal of optimal metal-plastic interface coating quality.

[0047] Those skilled in the art can understand that the above description is only the preferred examples of the present application and is not used to limit the present application, and although the present application is described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for part of the technical features. Any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A micro-injection molding integrated testing machine for a metal-plastic interface coated part, characterized in that, The test machine mold and the in-mold pressure and temperature detection system, the ultrasonic vibration system and the mechanical vibration system integrated in the test machine mold; The test machine mold comprises a fixed mold bottom plate, a fixed mold plate, a front mold core, a rear mold core, a movable mold plate, an upper ejector plate, a square iron, a lower ejector plate, an ejector pin, a movable mold bottom plate; the middle part of the fixed mold plate and the movable mold plate after clamping is provided with a flow channel; The ultrasonic vibration system and the mechanical vibration system are arranged oppositely between the fixed mold plate and the movable mold plate; The rear mold core is provided with a metal-plastic sample mold cavity and a standard tensile sample mold cavity at the same time, the metal-plastic sample mold cavity is provided with an ejector pin hole, a raised pad, a sample metal part positioning block and a tail positioning needle, the raised pad is used for supporting the metal part of the metal-plastic interface coated part, so that the melt can coat the metal part; the sample metal part positioning block is used for limiting the width direction of the metal part of the metal-plastic interface coated part, and the tail positioning needle is installed at the tail of the metal-plastic sample mold cavity and used for limiting the length direction of the metal part of the metal-plastic interface coated part; The in-mold pressure and temperature detection system comprises an in-mold temperature sensor one, an in-mold temperature sensor two, an in-mold temperature sensor three, an in-mold pressure sensor one, an in-mold pressure sensor two, an in-mold pressure sensor three, a data joint, a precision calibrator and a data acquisition terminal; the in-mold temperature sensor one, the in-mold temperature sensor two, the in-mold temperature sensor three and the in-mold pressure sensor three are all installed on the front mold core, the in-mold pressure sensor one and the in-mold pressure sensor two are installed on the rear mold core, the in-mold temperature sensor one and the in-mold temperature sensor two are arranged at different point positions of the flow channel on the side of the standard tensile sample mold cavity and used for measuring the temperature change at different distances from the glue inlet in the flow channel; the in-mold temperature sensor three is arranged in the metal-plastic sample mold cavity and used for monitoring the temperature state in the metal-plastic sample mold cavity; the pressure sensor one and the pressure sensor two are arranged at different point positions of the flow channel on the side of the standard tensile sample mold cavity, the pressure sensor one corresponds to the position of the in-mold temperature sensor one, the pressure sensor two corresponds to the position of the in-mold temperature sensor two, and the pressure sensor three is fixed in the metal-plastic sample mold cavity and arranged symmetrically with the temperature sensor three and used for monitoring the pressure state in the metal-plastic sample mold cavity; each sensor is connected to the data joint, the precision calibrator and the data acquisition terminal in sequence through a single-wire cable, the collected temperature or pressure data are arranged and analyzed by the data acquisition terminal, and process optimization suggestions are given.

2. The microinjection integrated testing machine for metal-plastic interface coated parts of claim 1, wherein, The test machine mold further comprises a mechanical vibration guide block and an ultrasonic vibration guide block, the mechanical vibration guide block and the ultrasonic vibration guide block are arranged oppositely and fixed on the rear mold core; the flow channel is located between the mechanical vibration guide block and the ultrasonic vibration guide block.

3. The microinjection integrated testing machine for metal-plastic interface coated parts of claim 1, wherein, The fixed mold plate, the front mold core, the movable mold plate and the rear mold core are provided with sensor fixing holes, and the fixed mold plate and the movable mold plate are fixedly connected with sensor pressing plates, and the axial movement of all the film internal temperature sensors and pressure sensors is limited by the front mold core, the rear mold core and the sensor pressing plates.

4. The microinjection integrated testing machine for metal-plastic interface coated parts of claim 2, wherein, The mechanical vibration system comprises a voice coil motor, a sleeve, a connecting rod and a mechanical vibration block, the voice coil motor is placed in the sleeve, the voice coil motor is fixedly connected with the connecting rod, the connecting rod is connected with the mechanical vibration block arranged near the flow channel in the mold cavity; the sleeve and the voice coil motor are fixed on the surface of the testing machine mold; the mechanical vibration block keeps stable axial movement through the mechanical vibration guide blocks fixed on both sides, and low-frequency high-amplitude vibration is applied to the melt flowing through the flow channel.

5. The microinjection integrated testing machine for metal-plastic interface coated parts of claim 4, wherein, The ultrasonic vibration system comprises an ultrasonic vibration generator, a gasket, a fixing block and an ultrasonic vibration block which are connected in sequence, the fixing block is fixed on the surface of the testing machine mold, the ultrasonic vibration block is fixedly connected with the ultrasonic vibration generator, the ultrasonic vibration block is arranged near the flow channel in the mold cavity and is symmetrical with the mechanical vibration block, and high-frequency low-amplitude vibration is applied to the melt flowing through the flow channel.

6. The microinjection integrated testing machine for metal-plastic interface coated parts of claim 4, wherein, In the testing machine mold, the fixed mold plate is fixed on the fixed mold base plate, the front mold core is fixed on the fixed mold plate, the rear mold core is fixed on the movable mold plate, the upper ejector plate and the lower ejector plate are fixed together, the ejector pin is fixed between the upper ejector plate and the lower ejector plate and penetrates upward through the movable mold plate, and the square iron is fixed between the movable mold plate and the movable mold base plate.

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