CN117705557A - Compression-resistant detection device and detection process for high-molecular injection molding part - Google Patents
Compression-resistant detection device and detection process for high-molecular injection molding part Download PDFInfo
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- CN117705557A CN117705557A CN202410070222.4A CN202410070222A CN117705557A CN 117705557 A CN117705557 A CN 117705557A CN 202410070222 A CN202410070222 A CN 202410070222A CN 117705557 A CN117705557 A CN 117705557A
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- 238000001514 detection method Methods 0.000 title claims abstract description 114
- 238000001746 injection moulding Methods 0.000 title claims abstract description 98
- 230000006835 compression Effects 0.000 title claims abstract description 69
- 238000007906 compression Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims description 29
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 61
- 238000005452 bending Methods 0.000 claims abstract description 40
- 229920000642 polymer Polymers 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims description 21
- 230000001360 synchronised effect Effects 0.000 claims description 17
- 238000013102 re-test Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 12
- 239000003381 stabilizer Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The application relates to a compression-resistant detection device for a polymer injection molding piece, and relates to the technical field of injection molding piece detection equipment, and the compression-resistant detection device comprises a frame, a detection platform arranged on the frame, and an impact head arranged on the frame in a lifting manner, wherein the impact head is arranged opposite to the detection platform, and the frame is also provided with a lifting piece for controlling the impact head to lift, and the detection platform is also provided with a clamping assembly for clamping a piece to be detected and an amplitude assembly for detecting the bending amplitude of the piece to be detected; the amplitude component comprises lifting blocks which are arranged on the detection platform in a sliding manner and a stabilizing piece which is used for enabling the detected lifting blocks to be stable, wherein the lifting blocks are provided with a plurality of groups, the lifting blocks are uniformly distributed on the detection platform at intervals, and the top sides of the lifting blocks are attached to the bottom sides of the pieces to be detected. The rebound index of the injection molding is convenient to detect, the impact detection of the injection molding is not influenced by equipment normally, and the rebound coefficient of the injection molding is convenient for a technician to observe.
Description
Technical Field
The application relates to the technical field of injection molding detection equipment, in particular to a compression-resistant detection device for a high polymer injection molding.
Background
Injection molded parts refer to various injection molded products produced by injection molding machines, collectively referred to as injection molded parts, including various packages, parts, and the like. Mainly made of polyethylene or polypropylene and various organic solvents, the choice of plastic piece is mainly determined by the type of plastic (thermoplastic or thermosetting), the initial form and the shape and size of the product. Injection molding is generally carried out by compression molding, transfer molding, and injection molding. Lamination, compression molding and thermoforming are the process of molding plastic onto a flat surface. The method can be used for rubber processing. In addition, there are casting or the like using a liquid monomer or polymer as a raw material. After the injection molding is produced, a certain amount of samples are required to be selected for compression resistance detection so as to judge whether the compression resistance is qualified or not.
The common compression-resistant detection equipment is hydraulic detection equipment, namely comprises a rack and a workbench arranged on the rack, an impact hammer is further arranged on the rack in a lifting mode, a hydraulic cylinder for controlling the impact hammer to descend is arranged on the rack, a pressure sensor is further arranged on the impact hammer, when compression-resistant detection of injection molding is carried out, a technician places a piece to be detected on the workbench, the impact hammer is controlled to descend through the hydraulic cylinder, the piece to be detected is pressed until the piece to be detected is completely deformed and broken, and the pressure index of a sensor at the moment is obtained, so that the compression strength and the yield strength of the piece to be detected can be detected.
When the injection molding piece is used as a shell of equipment (such as an air conditioner inner unit and a display), the yield strength of the injection molding piece is detected, the rebound resilience performance of the injection molding piece under the action of impact force is simulated under the actual use condition, so that the injection molding piece can be ensured to return to the original shape even if the injection molding piece is impacted when being used as the shell, the dynamic balance of the equipment in operation is ensured, and when the injection molding piece is subjected to impact resistance detection through the equipment, the efficiency is lower when the shell is subjected to compression resistance detection due to the fact that the expansion stroke of a hydraulic cylinder is slower, and the rebound resilience index of the injection molding piece is not obviously measured, so that the rebound resilience performance of the shell is not easily shown.
Disclosure of Invention
In order to be convenient for detect the resilience index of injection molding and not influence equipment and normally detect the impact of injection molding simultaneously, the resilience coefficient of injection molding is convenient for the technician to observe simultaneously, this application provides a resistance to compression detection device of polymer injection molding.
The application provides a resistance to compression detection device of polymer injection molding adopts following technical scheme:
the compression-resistant detection device for the high-molecular injection molding piece comprises a workbench, a clamping assembly and a turnover assembly, wherein the clamping assembly is arranged on the workbench, the turnover assembly is used for rotationally driving the clamping assembly, the clamping assembly comprises a rack, a detection platform arranged on the rack, an impact head arranged on the rack in a lifting mode, the impact head faces the detection platform and is arranged right opposite to the detection platform, a lifting piece used for controlling the impact head to lift is further arranged on the rack, and the detection platform is further provided with a clamping assembly used for clamping a piece to be detected and an amplitude assembly used for detecting the bending amplitude of the piece to be detected; the amplitude component comprises lifting blocks and stabilizing pieces, wherein the lifting blocks are arranged on the detection platform in a sliding mode, the stabilizing pieces are used for enabling the detected lifting blocks to be stable, multiple groups of lifting blocks are arranged on the lifting blocks, the lifting blocks are evenly distributed on the detection platform at intervals, and the top sides of the lifting blocks are attached to the bottom sides of pieces to be detected.
Through adopting above-mentioned technical scheme, when carrying out the resistance to compression to injection molding casing and examining, the technician is at first with injection molding casing place on testing platform to carry out the centre gripping through the clamping assembly who sets up to the casing and fix, then strike the casing through striking head whereabouts.
When the high-speed cameras are used for photographing the shell, recording and measuring are carried out according to the bending degree of the shell, but when the high-speed cameras are used for photographing, the position with the maximum bending degree of the shell is required to be judged, meanwhile, when the shell is bent under the general condition, the bending degree of the shell gradually decreases towards the periphery along the impact position of the impact head, namely, the deformation degree of the shell is the maximum depression degree of the impact position, the bending degree of the periphery of the shell gradually decreases, and the high-speed cameras can only photograph the depression degree of a fixed angle, namely, if only one group of high-speed cameras are arranged, only the bending surface of the shell or the side of the shell can be selected, the maximum bending degree of the shell and the deformation condition of the shell surface cannot be photographed at the same time, and if two or more groups of high-speed cameras are arranged for photographing the bending surface or the side of the shell, the photos of a plurality of groups of high-speed cameras are required to be processed and correspond, the deformation degree of the shell after the impact is not easy to be displayed, and the deformation degree and the rebound index of the shell cannot be calculated directly. Through foretell technical scheme, the in-process that the impact head descends makes the casing crooked downwards, because the bottom side of casing is laminated mutually with the lifter, drives the lifter at the crooked in-process of casing and descends, and after the impact, the casing can rebound under the coefficient of resilience of plastics itself, under the effect of stabilizer, the lifter does not take place to rebound to make the lifter remain the biggest deformation position that the casing took place under the effect of current impact all the time, thereby after the impact, technicians can judge the resilience performance and the resilience index of casing according to the condition of lifter and the condition of casing.
Simultaneously the multiunit lifter that sets up is laminated mutually with the bottom side of casing, more comprehensive demonstration casing's deformation degree, and the lifter that the interval was evenly laid is when carrying out impact detection to the casing, demonstrates the circumference side deformation degree of casing along impact position to the measurement and calculation of coefficient of restitution is carried out according to the lift degree of different lifter to the technician of being convenient for, thereby carries out the measurement of the rebound index to the casing when carrying out compressive detection to the casing.
Optionally, the holding tank has been seted up on the testing platform, the holding tank is located under the impact head, just the clamping assembly is including locating the clamping head on the testing platform, the clamping head is equipped with two sets of, and two sets of the clamping head all rotate set up in on the testing platform, two sets of the clamping head is located the relative both sides of holding tank.
When striking the casing, whole casing can take place to bend, if the clamping part is fixed, then the clamping part is equivalent to the bending that restraines the casing to lead to the rebound index survey to the casing inaccurately, through adopting above-mentioned technical scheme, two sets of grip blocks that set up carry out the centre gripping simultaneously to the opposite sides of casing, promote the stability to the casing centre gripping, the gripping head that rotates the setting is striking the casing, the casing bending drives the gripping head and rotates, thereby the rebound index survey that influences the casing when reducing because of the gripping head carries out the centre gripping to the casing, promote the accuracy to the rebound index survey of injection molding casing.
Optionally, be equipped with the mounting bracket on the testing platform, the mounting bracket is equipped with two sets of, and two sets of the mounting bracket with two sets of the gripping head one-to-one, the gripping head including rotate set up in first grip block on the mounting bracket and slide set up in second grip block on the first grip block, first grip block with the activity of second grip block is close to/keeps away from, just first grip block with leave the space of carrying out the centre gripping to the piece that awaits measuring between the second grip block.
Through adopting above-mentioned technical scheme, correspond with two gripping heads through two sets of mounting brackets that set up, thereby realize carrying out the centre gripping to the relative both sides of casing, and then the first grip block and the second grip block that set up, when the technician needs to carry out the resistance to compression to the casing and detect, the technician is first with the casing place between first grip block and second grip block, then through sliding the second grip block, make the second grip block be close to first grip block, carry out the centre gripping, thereby realize carrying out the centre gripping to the limit side of casing, when promoting the stability of casing centre gripping this moment, rotate first grip block and set up on the mounting bracket, do not influence the rotation when the gripping head carries out the centre gripping to the casing, thereby do not influence the bending of casing when carrying out the resistance to compression to the casing and detecting.
Optionally, the range subassembly is still including locating fixed sleeve in the holding tank, and the lifter is located in the fixed sleeve, the stabilizer is including locating the stabilizer on the fixed sleeve lateral wall, the stabilizer has been seted up on the lateral wall of lifter, the stabilizer activity inserts in the stabilizer tank, the stabilizer with the inside wall activity in stabilizer tank supports tightly.
Through adopting above-mentioned technical scheme, at the downwarping decline of casing, laminating lifter block removes, drives lifter block downward movement, and the in-process of lifter block downward movement this moment also gradually downward movement of stabilizing tank until stabilizing tank and stabilizing block are corresponding, and the stabilizing block inserts the stabilizing tank this moment in to make the lifter block descend the back be difficult for taking place to kick-back, thereby make the lifter block remain the position when casing bending degree is biggest throughout, thereby make the rebound index measurement of casing accurate.
Optionally, the stabilizing block is equipped with the multiunit, and multiunit stabilizing block with the equal joint adaptation of stabilizing slot, multiunit the stabilizing block is followed fixed sleeve's direction of height interval layout, just still be equipped with the regulating part that the stabilizing block on a plurality of fixed sleeve carries out synchronous sliding drive on the testing platform.
Through adopting above-mentioned technical scheme, the multiunit steady block of laying along fixed sleeve direction of height interval that sets up, but the in-process that descends at whole elevating block, steady groove and a plurality of steady block homojoint adaptation to homoenergetic realizes stable chucking when fixed cover descends to different degree of depth, thereby when the different position bending depth of casing is inconsistent, homoenergetic is gone up to the elevating block and is lifted to support tight regulation, thereby is convenient for judge the bending degree of casing according to the degree of descent of going out different position elevating block.
Optionally, the regulating part including slide set up in the alignment jig in the holding tank, the slip direction of alignment jig with the slip direction of stable piece is unanimous, and multiunit the regulating block all locates on the alignment jig, the alignment jig elasticity set up in the holding tank.
Because when need carry out compressive testing to injection molding casing, need carry out many times impact test, fall down the impact head from not co-altitude, every test all needs the decline degree of record lifter, because all be equipped with the stable groove with stable piece looks joint on every group lifter, therefore carry out compressive monitoring's in-process to injection molding casing, every lifter can realize descending, and when carrying out the impact test next time, need to adjust the stable piece on a plurality of lifter one by one, make the lifter rise to the coplanar, thereby be convenient for the impact test next time, and when adjusting a plurality of lifter one by one, the operation is comparatively loaded down with trivial details, the alignment jig that sets up carries out the simultaneous adjustment to a plurality of lifter, thereby make a plurality of lifter synchronous unblocks, reduce the time when technician carries out the unblock one by one to a plurality of lifter, thereby promote the efficiency of carrying out compressive testing to injection molding casing.
Optionally, the lifting block is elastically arranged in the fixed sleeve, and the lifting block is provided with scales.
Through adopting above-mentioned technical scheme, with lifting block elasticity setting in fixed bolster, after carrying out the unblock to the stable piece, fixed bolster is automatic to be replied to initial height under the effect of elastic restoring force to the technician of being convenient for resumes a plurality of lifting blocks to the operation when initial height, simplify the resistance to compression detection step to the injection molding casing, thereby promote the resistance to compression detection efficiency to the injection molding casing.
Simultaneously, the scale that sets up on the lifter, the technician of being convenient for directly recording the decline height of lifter that corresponds in different regions of injection molding casing to the deformation that the casing took place in the resistance to compression detects at every turn of being convenient for calculate, be convenient for calculate the elasticity index of casing.
Optionally, the mounting bracket slide set up in on the testing platform, two sets of the mounting bracket activity is close to/keeps away from, just still be equipped with on the testing platform and be used for making the slip of mounting bracket with the synchronous synchronizing piece that goes on of rotation of first grip block.
Through adopting above-mentioned technical scheme, because when carrying out compressive testing and impact detection test to the casing, the casing can take place to bend, and the in-process that the casing takes place to bend, the relative displacement can take place for the opposite both sides of casing, is close to each other promptly, and the casing then tends to "U" shape.
And the rebound index is recorded to the bending degree of the shell, if the two ends of the shell are fixedly clamped when the shell is clamped, the clamping blocks arranged at the two ends are equivalent to the clamping blocks for preventing the shell from bending deformation relative to the bending of the shell, so that the bending deformation degree of the shell and the rebound index are measured, and the compression resistance detection precision of the injection molding shell is affected.
Therefore, when the impact head impacts the injection molding shell through the mounting frame and the synchronizing piece which are arranged in a sliding manner, at the moment, the clamping heads at two ends are driven to rotate in the bending process of the shell, and the mounting frame is synchronously close to the injection molding shell under the action of the synchronizing piece, so that the influence on the bending degree of the shell when the clamping block and the mounting frame clamp the injection molding shell is reduced, and the precision in compression detection and impact detection of the shell is improved.
Optionally, the synchronizing piece is including locating the synchronizing gear of pivot department of first grip block, be equipped with the rack synchronizer on the testing platform, the mounting bracket slip set up in on the rack synchronizer, just the rack synchronizer with the synchronizing gear meshes mutually.
Through adopting above-mentioned technical scheme, carry out the in-process that the resistance to compression detected to the injection molding casing, first grip block takes place to rotate to drive synchronous gear and rotate, synchronous gear and rack-and-pinion engaged with this moment, thereby realize that the synchronization of mounting bracket is close to, thereby reduce the influence that the mounting bracket that fixed setting took place to the bending deformation that the injection molding casing produced.
Optionally, the edulcoration piece includes the elasticity setting in the butt piece of fixed sleeve bottom side, the butt soon with the bottom side activity of lifter piece supports tightly, just the butt piece elasticity set up in the fixed sleeve, the lateral wall of butt piece is the slope form, still be equipped with the regulation pole on the alignment jig, the end side of regulation pole with the slope side activity of butt piece supports tightly.
Through adopting above-mentioned technical scheme, in order to further the error to casing rebound index survey in the compressive testing, under initial condition, and adjust the pole and support the slope side of butt piece tightly, make the separation of butt piece initial condition under keep with the lifter bottom side, thereby reduce the contact of butt piece and lifter under the initial condition, reduce the lifter that the supporting of butt piece to the lifter leads to in the measurement process and be difficult for following the bending of casing to take place to descend, and under the initial condition, the steady piece of bottom side carries out the decline that reduces the lifter to the bottom side of lifter to a certain extent, keep the position of lifter under the initial condition, thereby promote the precision that carries out compressive testing to the casing.
The application also provides a compression-resistant detection process of the high polymer injection molding part, which adopts the following scheme: s1, placing a to-be-detected piece on a detection platform, and adjusting a first clamping block and a second clamping block to clamp the to-be-detected piece with different thicknesses;
s2, lifting the impact head to a height required for detection and then freely falling to enable the impact head to perform impact detection and compression resistance detection on the piece to be detected;
s3, recording the descending data scale of each lifting block, and calculating the rebound index of the piece to be detected under the current impact head height;
s4, after adjusting the lifting block to an initial position, performing a retest by adjusting the initial height of the impact head, adjusting the height of the impact head to +/-10 cm each time until the impact head impacts the shell to break the shell, obtaining a plurality of groups of data at the moment, eliminating the three groups of data before the shell breaks, integrating the plurality of groups of test data after the elimination, and calculating the rebound index of the part to be detected;
and S5, recording and calculating the three groups of data removed in the step S4 to obtain the yield strength of the shell.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the lifting block which is arranged on the detection platform in a lifting manner, in the compression-resistant detection process of the injection molding shell, the lifting block descends along with the bending of the injection molding shell, so that the maximum deformation of the injection molding shell in the compression-resistant detection process is conveniently subjected to visual measurement, and the rebound index of the injection molding shell is conveniently calculated in the compression-resistant detection process;
2. the clamping head and the mounting rack are arranged in a sliding manner, so that the influence of the clamping head and the mounting rack on the bending deformation of the shell is reduced in the bending deformation process of the injection molding shell, and the accuracy of the shell rebound index measurement is improved;
3. through the steady block and the steady slot that set up at fixed sleeve lateral wall, when injection molding casing takes place bending deformation, support tight elevating block decline and make the elevating block record the biggest deformation that injection molding casing took place under the effect of current impact head to the resilience index of injection molding casing in the compression resistance detection process of each time is calculated to the technician of being convenient for.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a compression-resistant detection device for a polymer injection molding part according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the connection relationship between the detection platform and the clamping head;
fig. 3 is a schematic diagram of a connection structure of the lifting block and the fixed sleeve.
Reference numerals: 1. a frame; 11. a detection platform; 12. a lifting member; 13. a receiving groove; 14. an impact head; 2. a clamping assembly; 21. a clamping head; 211. a first clamping block; 212. a second clamping block; 213. a hydraulic cylinder; 22. a mounting frame; 23. a slip groove; 24. a synchronizing member; 241. a synchronizing gear; 242. a synchronous rack; 3. an amplitude component; 31. a lifting block; 32. fixing the sleeve; 33. a stabilizing block; 34. a stabilizing groove; 35. an adjusting member; 351. an adjusting frame; 352. an adjusting spring; 36. a impurity removing member; 361. an abutment block; 362. abutting against the spring; 363. and (5) adjusting the rod.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-3.
The embodiment of the application discloses resistance to compression detection device of polymer injection molding. Referring to fig. 1, a compression-resistant detection device for a polymer injection molding piece comprises a frame 1 which is vertically fixed, a detection platform 11 which is fixed on the frame 1, an impact head 14 which is arranged on the frame 1 in a lifting manner, a lifting piece 12 which is used for controlling the lifting of the impact head 14 and a clamping component 2 which is used for clamping an injection molding piece shell and an amplitude component 3 which is used for monitoring the bending amplitude of the injection molding piece shell are arranged on the detection platform 11.
Referring to fig. 1 and 2, the lifting member 12 includes a lifting frame disposed on the frame 1, a lifting cylinder is disposed on a top side of the lifting frame, the lifting cylinder controls the lifting frame to lift, and an electromagnet is disposed on a bottom side of the lifting frame, and the impact head 14 is fixed with the electromagnet in a ferromagnetic manner, so that when the compression detection is performed on the injection molding shell, the height of the impact head 14 is adjusted through the disposed lifting cylinder, and when the height of the impact head 14 rises to a proper height, the lifting of the impact head 14 is controlled by controlling the on-off of the electromagnet, so that the compression detection is performed on the injection molding shell.
Referring to fig. 1 and 2, the detection platform 11 is provided with a containing groove 13, the containing groove 13 is just opposite to the impact head 14, the amplitude component 3 comprises a lifting block 31 which is arranged in the containing groove 13 in a lifting manner, the bottom side of the lifting block 31 is attached to the bottom side of the injection molding shell, when the injection molding shell is bent, the injection molding shell is attached to the lifting block 31, and meanwhile, the detection platform 11 is also provided with a stabilizing piece which enables the injection molding shell to be stable in position when the injection molding shell rebounds after being bent.
The amplitude component 3 further comprises a fixed sleeve 32 fixed in the accommodating groove 13, scales are arranged on the peripheral wall of the lifting block 31, the lifting block 31 is arranged in the fixed sleeve 32 in a lifting mode, limiting holes are formed in the side wall of the fixed sleeve 32, the stabilizing piece comprises a stabilizing block 33 which is elastically movably arranged through the limiting holes, a stabilizing groove 34 is formed in the side wall of the lifting block 31, the stabilizing block 33 is movably inserted into the stabilizing groove 34, and the side wall of the stabilizing block 33 is movably attached to and abutted against the inner side wall of the stabilizing groove 34.
Meanwhile, in order to realize automatic positioning of the lifting block 31, namely automatic clamping of the stabilizing block 33 and the stabilizing groove 34, the end side of the stabilizing block 33 extending into the stabilizing groove 34 is inclined, the top side width of the stabilizing block 33 is narrower than the bottom side width of the stabilizing block 33, and the inclined side of the stabilizing block 33 is attached to and abutted against the side wall of the lifting block 31, so that the stabilizing block 33 is immersed into the limiting hole for arrangement, the stabilizing block 33 is automatically inserted into the stabilizing groove 34 under the action of elastic restoring force, stable limiting of the lifting block 31 is realized, and the bending degree of the injection molding shell is displayed.
Meanwhile, it should be noted that, because the compression resistance detection device improvement that this application proposed is based on in actual production detects compression resistance and rebound index to the interior casing of air conditioner, in actual production scene, detect compression resistance to the interior casing of air conditioner and rebound index detection divide into two equipment and go on, when the interior casing of air conditioner is moulded plastics, the degree of deformation that probably leads to the different places is inconsistent because of the degree of consistency of material distribution, need demonstrate the degree of deformation of different places when the rebound index detects to the casing, consequently, need demonstrate the degree of deformation of whole casing bottom surface, in order to help realizing this problem, lifting block 31 is equipped with a plurality of, a plurality of lifting blocks 31 are evenly laid along holding tank 13 interval, a plurality of lifting blocks 31 are the array and are laid, the top side of a plurality of lifting blocks 31 all is laminated with the bottom side of moulding plastics casing, when carrying out compression resistance to the detection to the moulding plastics casing, the degree of bending of different places is inconsistent promptly, the degree of falling of lifting block 31 that is inconsistent also, consequently, in order to make the degree of falling of lifting block 31 of different places inconsistent, a plurality of lifting block 31 correspond to each lifting block 31 and a plurality of stable block 33 are equipped with a plurality of stable blocks 33 and a plurality of stable sleeve 33 are located along the stable groove 33, and a plurality of stable 33 are located along the stable direction of stable groove 33.
In the process of actually performing impact compression-resistant detection on the injection molding shell, the impact head 14 needs to be lifted to different positions and then detected for multiple times until the shell breaks, so that the calculated rebound index of the shell is high in precision, each lifting block 31 needs to be adjusted to an initial state after detection is finished each time, the next detection is realized, and if a technician is required to perform independent unlocking adjustment on each lifting block 31, the whole process is complicated. Therefore, in order to solve the problem, the detecting platform 11 is further provided with an adjusting member 35 for simultaneously adjusting the stabilizing blocks 33 on the plurality of lifting blocks 31, the adjusting member 35 comprises an adjusting frame 351 arranged in the accommodating groove 13, the adjusting frame 351 is arranged in a rectangular frame, the adjusting frame 351 is slidably arranged on the detecting platform 11, the plurality of stabilizing blocks 33 on each lifting block 31 are elastically arranged on the adjusting frame 351, the stabilizing blocks 33 are in a T-shaped sleeve shape, and the large end of each stabilizing block 33 is fixedly connected with an adjusting spring 352, the adjusting springs 352 are fixedly connected with the adjusting frame 351, so that after a technician records the descending height of each lifting block 31, the technician can unlock the lifting blocks 31 by poking the adjusting frame 351 to enable the stabilizing blocks 33 to be separated from the limiting holes, and then move the lifting blocks 31 to a position which is originally attached to the bottom side of the shell.
Further, the lifting block 31 needs to be lifted after the stabilizing block 33 is unlocked, and when the injection molding shell is subjected to impact pressure-resistant detection, the lifting block 31 needs to be free from supporting action, so that the precision of descending adjustment of the lifting block 31 by the shell is improved, therefore, referring to fig. 3, the detecting platform 11 is further provided with a impurity removing member 36, the impurity removing member 36 comprises an abutting block 361 elastically arranged at the bottom side of the fixed sleeve 32, the top side of the abutting block 361 is movably abutted against the bottom side of the lifting block 31, an abutting spring 362 is fixedly connected between the inner bottom wall of the bottom side accommodating groove 13 of the abutting block 361, the side wall of the abutting block 361 is inclined, the thickness of one side, close to the lifting block 31, is smaller than the thickness of one side, far away from the lifting block 31, of the abutting block 361, meanwhile, the end side of the adjusting rod 363 is fixedly connected with the inclined side of the abutting block 361, at the moment, the length of the adjusting rod 363 is longer than the length of the stabilizing block 33, namely, when the stabilizing block 33 stretches into the limiting hole to movably abut against the bottom side of the lifting block 31, the abutting block 361 is still separated from the lifting block 31, and the abutting block 361 is still kept in the direction, and the abutting block 361 is moved to be separated from the lifting block 31.
After the compression-resistant detection is finished, a technician pulls the adjusting frame 351 to separate the adjusting rod 363 from the abutting block 361, the abutting block 361 lifts the lifting block 31 under the action of the abutting spring 362, so that the lifting block 31 rises to an initial state to be attached to the shell, after the adjusting frame 351 slides to enable the stabilizing block 33 to be inserted into the limiting hole, the adjusting rod 363 abuts against the inclined side of the abutting block 361, so that the abutting block 361 moves downwards, the abutting block 361 at the moment is separated from the lifting block 31, at the moment, the bottom side of the lifting block 31 is slightly limited after the stabilizing block 33 at the bottommost side stretches into the fixed sleeve 32, the lifting block 31 is not easy to descend under the action of self gravity, the bending degree during the compression-resistant detection of the shell is affected, and the compression-resistant detection precision of the injection molding shell is convenient to improve.
In the process of compression-resistant detection and impact on the injection molding shell, the injection molding is easy to shake in position in the rebound process after impact, so that in the process of actual compression-resistant detection, the side of the injection molding shell is required to be clamped, therefore, referring to fig. 2, the clamping assembly 2 comprises clamping heads 21 arranged on two opposite sides of the accommodating groove 13 of the detection platform 11, the clamping heads 21 are provided with two groups, the two groups of clamping heads 21 are symmetrically distributed relatively, the clamping heads 21 comprise a first clamping block 211 and a second clamping block 212 which is arranged on the first clamping block 211 in a sliding manner, a clamping cavity for clamping the shell is reserved between the first clamping block 211 and the second clamping block 212, and a hydraulic cylinder 213 for sliding and adjusting the second clamping block 212 is arranged on the second clamping block 212; therefore, when the injection molding shell needs to be clamped, a technician places the side of the injection molding shell between the first clamping block 211 and the second clamping block 212, and then adjusts the second clamping block 212 through the hydraulic cylinder 213, so that the first clamping block 211 and the second clamping block 212 stably clamp the injection molding shell, and stability in the compression-resistant detection process of the injection molding shell is further maintained.
The rebound index is then to record the bending degree of casing, when carrying out the centre gripping to the casing this moment, if carry out fixed centre gripping to the both ends of casing, then for the bending of casing, the clamping shoe that both ends set up is equivalent to preventing the casing and take place bending deformation, thereby make the degree of bending deformation to the casing and rebound index's measurement, influence the resistance to compression detection precision to the injection molding casing, in order to improve this problem, the test platform 11 has seted up the sliding groove 23 in the opposite both sides of holding tank 13, and clamping assembly 2 still includes the mounting bracket 22 that slides and set up in the sliding groove 23, first clamping shoe 211 rotates and sets up on mounting bracket 22, and still be equipped with the synchronizing piece 24 that is used for making the slip of mounting bracket 22 go on with the rotation of first clamping shoe 211 on the test platform 11, when impact head 14 is striking the injection molding casing, at this moment, drive the clamping head 21 at both ends and rotate in the in step of casing emergence bending, at this moment under the effect of synchronizing piece 24, realize reducing clamping shoe and 22 to carry out the resistance to compression detection to the injection molding casing in the process of resistance to compression detection, and the influence to the resistance to compression detection precision to the casing when lifting bending the clamping to the casing.
Referring further to fig. 2, the synchronizing member 24 includes a synchronizing gear 241 disposed at the rotation axis of the first clamping block 211, a synchronizing rack 242 is disposed on the detection platform 11, the mounting frame 22 is slidably disposed on the synchronizing rack 242, and the synchronizing rack 242 is meshed with the synchronizing gear 241.
In the compression-resistant detection process of the injection molding shell, the first clamping block 211 rotates to drive the synchronous gear 241 to rotate, and at the moment, the synchronous gear 241 is meshed with the synchronous rack 242, so that synchronous approaching of the mounting frame 22 is realized, and the influence of the bending deformation of the fixedly arranged mounting frame 22 on the injection molding shell is reduced.
The implementation principle of the compression-resistant detection device for the high polymer injection molding part is as follows: when the compression detection is carried out on the injection molding shell, a technician places the shell between the two clamping heads 21, adjusts the second clamping block 212 through the hydraulic cylinder 213, clamps the injection molding shell by the first clamping block 211 and the second clamping block 212, then adjusts the height of the impact head 14 through the lifting cylinder, and when the height of the impact head 14 rises to a proper height, controls the lifting of the impact head 14 through controlling the on-off of the electromagnet, and then carries out the compression detection on the injection molding shell.
During compression detection, the injection molding shell is bent to tightly prop against the lifting block 31 to descend, at the moment, the lifting blocks 31 at different positions descend, so that the stabilizing blocks 33 at different positions are inserted into the stabilizing grooves 34, and when the injection molding shell rebounds, the lifting blocks 31 are not easy to rebound.
After the compression-resistant detection is finished, a technician pulls the adjusting frame 351 to separate the adjusting rod 363 from the abutting block 361, the abutting block 361 lifts the lifting block 31 under the action of the abutting spring 362, so that the lifting block 31 is lifted to an initial state to be attached to the shell, after the adjusting frame 351 slides to enable the stabilizing block 33 to be inserted into the limiting hole, the adjusting rod 363 abuts against the inclined side of the abutting block 361, so that the abutting block 361 moves downwards, the abutting block 361 at the moment is separated from the lifting block 31, the bottom side of the lifting block 31 is slightly limited after the bottommost stabilizing block 33 stretches into the fixed sleeve 32, the lifting block 31 is not easy to descend under the action of self gravity, and a gap is reserved between the bottom side of the lifting block 31 and the inner bottom wall of the fixed sleeve, so that when the shell is bent, the force of the lifting block in the vertical direction is efficiently converted into the descending degree of the lifting block, the descending degree of the lifting block is consistent with the bending degree of the shell, and the compression-resistant detection precision of the injection molding shell is convenient to improve.
The application also provides a compression-resistant detection process of the high polymer injection molding part, which adopts the following scheme: s1, placing a to-be-detected piece on a detection platform 11, and adjusting a first clamping block 211 and a second clamping block 212 to clamp the to-be-detected piece with different thicknesses;
s2, lifting the impact head 14 to a height required for detection and then freely falling to enable the impact head 14 to perform impact detection and compression detection on a piece to be detected;
s3, recording the descending data scale of each lifting block 31, and calculating the rebound index of the piece to be detected under the current height of the impact head 14;
s4, after adjusting the lifting block 31 to an initial position, performing a retest by adjusting the initial height of the impact head 14, adjusting the height of the impact head to +/-10 cm each time until the impact head impacts the shell to break the shell, obtaining a plurality of groups of data at the moment, eliminating the three groups of data before the shell breaks, integrating the plurality of groups of test data after the elimination, and calculating the rebound index of the part to be detected;
and S5, recording and calculating the three groups of data removed in the step S4 to obtain the yield strength of the shell.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides a resistance to compression detection device of polymer injection molding which characterized in that: the device comprises a frame (1), a detection platform (11) arranged on the frame (1), and a lifting impact head (14) arranged on the frame (1), wherein the impact head (14) faces to the detection platform (11) and is arranged right opposite to the detection platform, a lifting element (12) for controlling the lifting of the impact head (14) is further arranged on the frame (1), and a clamping assembly (2) for clamping a piece to be detected and an amplitude assembly (3) for detecting the bending amplitude of the piece to be detected are further arranged on the detection platform (11);
the amplitude component (3) comprises lifting blocks (31) which are arranged on the detection platform (11) in a sliding manner and stabilizing pieces which are used for enabling the detected lifting blocks (31) to be stable, wherein the lifting blocks (31) are provided with a plurality of groups, the lifting blocks (31) are uniformly distributed on the detection platform (11) at intervals, and the top sides of the lifting blocks (31) are attached to the bottom sides of the pieces to be detected.
2. The compression-resistant detection device for a polymer injection molding part according to claim 1, wherein: the utility model discloses a detecting platform, including detecting platform (11) and clamping assembly (2), detecting platform (11) is last to have seted up holding tank (13), holding tank (13) are located under impact head (14), just clamping assembly (2) are including locating clamping head (21) on detecting platform (11), clamping head (21) are equipped with two sets of, and two sets of clamping head (21) all rotate set up in on detecting platform (11), two sets of clamping head (21) are located the relative both sides of holding tank (13).
3. The compression-resistant detection device for a polymer injection molding part according to claim 2, wherein: the device is characterized in that the detection platform (11) is provided with a mounting frame (22), the mounting frame (22) is provided with two groups, the mounting frame (22) corresponds to the two groups of clamping heads (21) one by one, the clamping heads (21) are arranged on the mounting frame (22) in a rotating mode, the first clamping blocks (211) and the second clamping blocks (212) on the first clamping blocks (211) are arranged in a sliding mode, the first clamping blocks (211) and the second clamping blocks (212) are movably close to/far away from each other, and a gap for clamping a piece to be detected is reserved between the first clamping blocks (211) and the second clamping blocks (212).
4. A compression-resistant detection device for a polymer injection molding according to claim 3, wherein: the amplitude component (3) further comprises a fixed sleeve (32) arranged in the accommodating groove (13), the lifting block (31) is arranged in the fixed sleeve (32) in a lifting mode, the stabilizing piece comprises a stabilizing block (33) arranged on the side wall of the fixed sleeve (32), a stabilizing groove (34) is formed in the side wall of the lifting block (31), the stabilizing block (33) is movably inserted into the stabilizing groove (34), and the stabilizing block (33) is tightly abutted to the inner side wall of the stabilizing groove (34) in a movable mode.
5. The compression-resistant detection device for a polymer injection molding part according to claim 4, wherein: the stabilizing blocks (33) are provided with a plurality of groups, the stabilizing blocks (33) are matched with the stabilizing grooves (34) in a clamping mode, the stabilizing blocks (33) are distributed along the height direction of the fixing sleeve (32) at intervals, and the detecting platform (11) is further provided with adjusting pieces (35) for synchronous sliding driving of the stabilizing blocks (33) on the fixing sleeve (32).
6. The compression-resistant detection device for a polymer injection molding part according to claim 5, wherein: the adjusting piece (35) comprises an adjusting frame (351) which is arranged in the accommodating groove (13) in a sliding mode, the sliding direction of the adjusting frame (351) is consistent with that of the stabilizing block (33), multiple groups of adjusting blocks are arranged on the adjusting frame (351), and the adjusting frame (351) is elastically arranged in the accommodating groove (13).
7. The compression-resistant detection device for a polymer injection molding part according to claim 6, wherein: the lifting block (31) is elastically arranged in the fixed sleeve (32), and scales are arranged on the lifting block (31).
8. The compression-resistant detection device for a polymer injection molding part according to claim 7, wherein: the mounting frame (22) is slidably arranged on the detection platform (11), two groups of mounting frames (22) are movably close to/far away from each other, and the detection platform (11) is further provided with a synchronizing piece (24) for synchronizing the sliding of the mounting frames (22) with the rotation of the first clamping blocks (211).
9. The compression-resistant detection device for a polymer injection molding part according to claim 8, wherein: the synchronous piece (24) comprises a synchronous gear (241) arranged at the rotating shaft of the first clamping block (211), a synchronous rack (242) is arranged on the detection platform (11), the installation frame (22) is arranged on the synchronous rack (242) in a sliding mode, and the synchronous rack (242) is meshed with the synchronous gear (241).
10. A process for detecting a polymer injection molding, which is applied to the compression-resistant detection device for the polymer injection molding according to any one of claims 1 to 9, and is characterized in that: comprises the following steps of;
s1, placing a to-be-detected piece on a detection platform (11), and adjusting a first clamping block (211) and a second clamping block (212) to clamp the to-be-detected piece with different thicknesses;
s2, lifting the impact head (14) to a height required for detection and then freely falling to enable the impact head (14) to perform impact detection and compression detection on a piece to be detected;
s3, recording the descending data scale of each lifting block (31), and calculating the rebound index of the piece to be detected under the current height of the impact head (14);
s4, after adjusting the lifting block (31) to an initial position, performing a retest by adjusting the initial height of the impact head (14), and adjusting the height of the impact head (14) to be +/-10 cm each time until the impact head (14) impacts the piece to be detected to fracture the piece to be detected, obtaining multiple groups of data at the moment, removing three groups of data before shell fracture, integrating multiple groups of test data after removal, and calculating the rebound index of the piece to be detected;
and S5, recording and calculating the three groups of data removed in the step S4 to obtain the yield strength of the piece to be detected.
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