A clamping mechanism for injection molding machine

Abstract

The present invention relates to the technical field of mold locking mechanisms, and specifically to a mold locking mechanism for an injection molding machine, comprising a mold locking assembly, two hydraulic oil pipes and two washing pipes, a calibration pressure-bearing mechanism installed on the mold locking assembly, a multi-stage hydraulic mechanism installed on the calibration pressure-bearing mechanism, and a cleaning and gasket changing mechanism installed in the multi-stage hydraulic mechanism. By setting a hydraulic assembly of a traditional integral structure into a multi-stage split structure, using an independent and sufficiently safe cylindrical cavity, and cooperating with a cleaning and gasket changing mechanism to provide a preset inspection window in the cylindrical cavity, when the sealing gasket is worn, the damaged sealing gasket will be drained and removed through the preset inspection window through the sealing clamping of the hydraulic sub-rod plug by the cleaning and gasket changing mechanism, and finally a new sealing gasket can be reassembled on the plug of the hydraulic sub-rod along the inspection window, so that the sealing gasket can be quickly and safely replaced at the lowest cost.

Description

Technical Field

[0001] The invention relates to the technical field of mold locking mechanisms, in particular to a mold locking mechanism for an injection molding machine. Background Art

[0002] The clamping mechanism of the injection molding machine is divided into three types: mechanical manual clamping system, hydraulic power system and electromagnetic power system. The most commonly used is the hydraulic power system. Due to the low cost and low debugging difficulty of the hydraulic power system, it is widely used.

[0003] After long-term use, the sealing gasket at the inner end of the hydraulic rod of the hydraulic power system used for clamping in traditional medium-sized injection molding machines will wear out, resulting in leakage of hydraulic oil, which will cause the pressure of the upper mold to relax. In severe cases, it will cause the upper mold to extrude hot melt materials and cause shaking. At the same time, due to the interference of the volume of the medium-sized injection molding machine, the cost of disassembly and replacement of damaged sealing gaskets is high. Due to space limitations, it will also increase the difficulty of workers' work. At the same time, there will be overflow and waste of hydraulic oil.

[0004] In view of this, a clamping mechanism for an injection molding machine is designed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] A locking mechanism for an injection molding machine comprises a locking assembly, two hydraulic oil pipes and two washing pipes, a calibration pressure-bearing mechanism installed on the locking assembly, a multi-stage hydraulic mechanism installed on the calibration pressure-bearing mechanism and a cleaning and pad changing mechanism installed in the multi-stage hydraulic mechanism; the locking assembly is used to provide a stable compression molding platform for an upper mold and a lower mold; the calibration pressure-bearing mechanism is used to carry the multi-stage hydraulic mechanism and provide a central anti-pressure for its operation; the multi-stage hydraulic mechanism comprises a boosting assembly, a propulsion assembly arranged in the boosting assembly and a hydraulic auxiliary pipe arranged on the boosting assembly; the two hydraulic oil pipes are used to inject washing liquid into an inspection window in the cleaning and pad changing mechanism; the cleaning and pad changing mechanism comprises a pressure-resistant shell arranged in the hydraulic auxiliary pipe, two guide members arranged in two slots inside the pressure-resistant shell, two gaskets arranged in the pressure-resistant shell and a cutting head arranged in the pressure-resistant shell; the two washing pipes are used to provide hydraulic oil for thrust for the multi-stage hydraulic mechanism.

[0008] In a preferred example, the present invention can be further configured as follows: the calibration pressure-bearing mechanism includes a base, the base has two transverse holes formed inside, two plug rods are arranged in the two transverse holes, a calibration end mounted on the two plug rods, a spring fixedly mounted on the other end of the plug rod, and a nut mounted on the external threaded end tube of the base;

[0009] The base is mounted on the outer end of the hydraulic auxiliary pipe;

[0010] The calibration end is arranged in the inner cavity of the hydraulic auxiliary pipe;

[0011] An annular groove is provided on the inner side of the nut, and the ends of the two insertion rods away from the calibration ends are clamped in the annular groove.

[0012] In a preferred example, the present invention can be further configured as follows: the multi-stage hydraulic mechanism further includes a gasket and an adapter, a clamping plate installed on the hydraulic auxiliary pipe, a flow control guide rod installed in the clamping plate, and a shield arranged in the hydraulic auxiliary pipe;

[0013] The cylindrical end of the flow control guide rod penetrating into the inner cavity of the hydraulic auxiliary pipe is adapted to be inserted into the end plate of the protective cover penetrating into the inner cavity of the hydraulic auxiliary pipe, and the top of the protective cover is provided with an arc-shaped notch for sealing the adapter port;

[0014] One of the hydraulic oil pipes is connected to the adapter.

[0015] In a preferred example, the present invention can be further configured as follows: the booster assembly includes a hydraulic main pipe, the inner wall of the hydraulic main pipe is provided with a slide groove, and a positioning buckle and a first screw threadedly installed in the hydraulic main pipe are movably installed in the slide groove;

[0016] The positioning buckle is in a semicircular structure as a whole, and a plug hole is provided on the outside of the positioning buckle, and the column head of the first screw rod that passes through the inner end of the hydraulic main pipe is clamped in the plug hole.

[0017] In a preferred example, the present invention can be further configured as follows: the propulsion assembly includes a hydraulic sub-rod arranged inside the hydraulic main pipe, a sealing gasket installed on the plug at the inner end of the hydraulic sub-rod by bolts, and an anti-seepage plug arranged in the annular groove of the plug at the inner end of the hydraulic sub-rod.

[0018] In a preferred example, the present invention can be further configured as follows: the cleaning and pad changing mechanism also includes a control bolt disposed in the guide member and threadedly mounted in the pressure-resistant housing, a sealing cover mounted in a threaded port at the outer end of the guide member, and a boosting solenoid movably mounted in the middle of the pressure-resistant housing;

[0019] The boosting solenoid is provided with a hole inside, and a wire is arranged in the hole, and the two wires passing through the hole are connected to the pole of the cut head;

[0020] The cutting head is connected with a tension spring, and the other end of the tension spring is connected to the inner wall of the pressure-resistant shell, so as to provide a reset force for the cutting head.

[0021] In a preferred example, the present invention can be further configured as follows: a heating resistance wire is arranged inside the cutting head, and a triangular cutter head is provided at the inner end of the cutting head;

[0022] The widths of the cutting head and the two guide members are the same as the width of the annular groove of the plug head at the inner end of the hydraulic sub-rod.

[0023] In a preferred example, the present invention can be further configured as follows: the guide member is in an L-shaped structure as a whole, and the end of the guide member penetrating into the inner cavity of the pressure-resistant shell is provided with an arc-shaped slope, and the arc-shaped slope is provided with a corrugated transverse groove for increasing friction resistance;

[0024] A through hole for guiding the washing pipe to extend therein is provided inside the guide member, and the through hole is used to provide a guide for the external booster member and the new sealing gasket.

[0025] In a preferred example, the present invention can be further configured as follows: the mold clamping assembly includes a backing plate, two beams installed in the backing plate, a pressure-bearing member installed at the outer ends of the two beams, an upper mold carrier plate movably installed on the two beams, and a linkage frame connected between the backing plate and the upper mold carrier plate;

[0026] The hydraulic sub-rod penetrates into the pad and is used to provide a constant driving force for the linkage frame.

[0027] In a preferred example, the present invention can be further configured as follows: the end surface of the upper mold carrier plate close to the pressure-bearing member is used to provide a pressurizing platform for the upper mold, and the inner side of the pressure-bearing member is used to provide a pressure-resistant platform for the lower mold.

[0028] By adopting the above technical solution, the beneficial effects achieved by the present invention are:

[0029] 1. The present invention arranges the hydraulic assembly of the traditional integral structure into a multi-section split structure, utilizes an independent and sufficiently safe cylindrical cavity, cooperates with a cleaning and gasket changing mechanism for a preset inspection window in the cylindrical cavity, and when the sealing gasket is worn, the cleaning and gasket changing mechanism seals and clamps the hydraulic sub-rod plug, and the damaged sealing gasket will be drained and removed through the preset inspection window, and finally a new sealing gasket can be reassembled on the plug of the hydraulic sub-rod along the inspection window, so that the sealing gasket can be quickly and safely replaced at the lowest cost.

[0030] 2. The present invention provides a sealing shield for a port for injecting hydraulic oil on a cylindrical cavity, and sets a sealing anti-seepage plug in the hydraulic main pipe. At this time, the plug at the inner end of the hydraulic sub-rod will be accurately inserted into the interior of the pressure-resistant shell under the constraint of the calibration end after extension. At this time, the two plugs can cooperate with the pressure-resistant shell to seal the hydraulic oil in the cylindrical cavity. At this time, the hydraulic power system can be repaired without oil control, while reducing the number of cumbersome steps.

[0031] 3. The present invention arranges a calibration end which can control the extension spacing of the hydraulic sub-rod plug in a segmented hydraulic pipe, and utilizes the calibration end to protect the plug from misalignment, so that two gaskets can provide oil-proof protection to both sides of the plug, i.e., the sealing gasket. Finally, the damaged sealing gasket and the hydraulic oil in the plug can be flushed with cleaning liquid, thereby ensuring the accuracy of replacing the sealing gasket when replacing the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the present invention when used;

[0033] Figure 2 It is a schematic diagram of the clamping assembly of the present invention;

[0034] Figure 3 It is a partial cross-sectional schematic diagram of the present invention;

[0035] Figure 4 It is an exploded schematic diagram of calibrating the pressure-bearing mechanism of the present invention;

[0036] Figure 5 It is a cross-sectional schematic diagram of the hydraulic main pipe and the hydraulic auxiliary pipe of the present invention;

[0037] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point A in the middle;

[0038] Figure 7 is a schematic diagram of a propulsion assembly of the present invention;

[0039] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle;

[0040] Fig. 9 It is a partial schematic diagram of the multi-stage hydraulic mechanism of the present invention;

[0041] Fig.10 It is a cross-sectional schematic diagram of the pressure-resistant shell of the present invention;

[0042] Fig.11 It is a partial schematic diagram of the cleaning and pad changing mechanism of the present invention.

[0043] Reference numerals:

[0044] 100, clamping assembly; 110, backing plate; 120, beam; 130, pressure-bearing member; 140, upper mold carrier; 150, linkage frame;

[0045] 200, calibration pressure bearing mechanism; 210, base; 220, nut; 230, spring; 240, insertion rod; 250, calibration end;

[0046] 300, multi-stage hydraulic mechanism; 310, booster assembly; 311, hydraulic main pipe; 312, positioning buckle; 313, first screw; 320, gasket; 330, hydraulic auxiliary pipe; 340, clamp; 350, flow control guide rod; 360, shield; 370, adapter; 380, propulsion assembly; 381, hydraulic sub-rod; 382, ​​sealing gasket; 383, anti-seepage plug;

[0047] 400, hydraulic oil pipe;

[0048] 500, cleaning and changing pad mechanism; 510, pressure-resistant housing; 520, gasket; 530, tension spring; 540, cutting head; 550, wire; 560, boosting solenoid; 570, guide piece; 580, position control bolt; 590, cover;

[0049] 600. Washing pipe. DETAILED DESCRIPTION

[0050] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0051] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0052] A mold clamping mechanism for an injection molding machine provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings. Embodiment 1:

[0053] Combination Figure 1-Figure 11As shown, the present invention provides a clamping mechanism for an injection molding machine, comprising a clamping assembly 100, two hydraulic oil pipes 400 and two washing pipes 600, a calibration pressure-bearing mechanism 200 installed on the clamping assembly 100, a multi-stage hydraulic mechanism 300 installed on the calibration pressure-bearing mechanism 200 and a cleaning and pad changing mechanism 500 installed in the multi-stage hydraulic mechanism 300, the clamping assembly 100 is used to provide a stable compression molding platform for the upper mold and the lower mold, the calibration pressure-bearing mechanism 200 is used to carry the multi-stage hydraulic mechanism 300 and provide a central resistance to pressure for its operation, the two hydraulic oil pipes 400 are used to inject washing liquid into the inspection window in the cleaning and pad changing mechanism 500, and the two washing pipes 600 are used to provide hydraulic oil for thrust to the multi-stage hydraulic mechanism 300.

[0054] The clamping assembly 100 includes a backing plate 110, two beams 120 installed in the backing plate 110, a pressure-bearing member 130 installed at the outer ends of the two beams 120, an upper mold carrier plate 140 movably installed on the two beams 120, and a linkage frame 150 connected between the backing plate 110 and the upper mold carrier plate 140;

[0055] The calibration pressure bearing mechanism 200 includes a base 210, the base 210 has two transverse holes formed therein, two plug rods 240 are disposed in the two transverse holes, a calibration end 250 mounted on the two plug rods 240, a spring 230 fixedly mounted on the other end of the plug rods 240, and a nut 220 mounted on the external threaded end tube of the base 210;

[0056] The hydraulic sub-rod 381 penetrates into the pad 110 and is used to provide a constant driving force for the linkage frame 150;

[0057] The end surface of the upper mold carrier plate 140 close to the pressure-bearing member 130 is used to provide a pressurizing platform for the upper mold, and the inner side of the pressure-bearing member 130 is used to provide a pressure-resistant platform for the lower mold;

[0058] The multi-stage hydraulic mechanism 300 includes a booster assembly 310, a propulsion assembly 380 disposed in the booster assembly 310, a hydraulic sub-pipe 330 disposed on the booster assembly 310, a gasket 320 and an adapter 370, a clamping plate 340 installed on the hydraulic sub-pipe 330, a flow control guide rod 350 installed in the clamping plate 340, and a shield 360 disposed in the hydraulic sub-pipe 330;

[0059] The cleaning and pad changing mechanism 500 includes a pressure-resistant shell 510 arranged in the hydraulic auxiliary pipe 330, two guide members 570 arranged in two slots inside the pressure-resistant shell 510, two washers 520 arranged in the pressure-resistant shell 510, a cutting head 540 arranged in the pressure-resistant shell 510, a control bolt 580 arranged in the guide member 570 and threadedly installed in the pressure-resistant shell 510, a cover 590 installed in the threaded port at the outer end of the guide member 570, and a booster coil 560 movably installed in the middle of the pressure-resistant shell 510.

[0060] Since the traditional hydraulic power system is composed of a hydraulic mother pipe and a hydraulic sub-rod, when this type of hydraulic power system is installed inside a medium-sized injection molding machine, when the sealing gasket on the inner end plug of the hydraulic sub-rod is worn and causes pressure imbalance, the device needs to be completely removed from the medium-sized injection molding machine and the damaged sealing gasket can be replaced only after oil control and cleaning. The replaced sealing gasket also needs to be assembled and tested. This method not only increases the workload of workers, but also has many replacement steps and the cost will increase accordingly.

[0061] The device is provided with a segmented hydraulic main pipe 311, a hydraulic sub-pipe 330 and a base 210. At this time, the ends of the hydraulic main pipe 311 and the hydraulic sub-pipe 330 connected to each other form an independent cylindrical cavity, and a pressure-resistant shell 510 is provided in the cylindrical cavity. When the sealing gasket 382 provided on the plug head at the inner end of the hydraulic sub-rod 381 is worn;

[0062] The calibration end 250 is pushed toward the inner cavity of the hydraulic auxiliary pipe 330 in advance until the plug at the inner end of the hydraulic sub-rod 381 is under pressure on the calibration end 250. At this time, the plug can be quickly clamped in the interior of the pressure-resistant shell 510 under pressure calibration, and the two washers 520 arranged inside the pressure-resistant shell 510 can press the two ends of the plug. At this time, the two sockets inside the pressure-resistant shell 510 can be connected to the annular groove of the plug, and a small amount of hydraulic oil in the annular groove of the plug can be extracted by using two washing pipes 600, and the annular groove of the plug can be cleaned with washing liquid. After the damaged sealing gasket 382 is cut off by the cutting head 540, the cut sealing gasket 382 can be guided out along the bottom-placed plug hole in the pressure-resistant shell 510 by using the external booster, and finally a new sealing gasket is cut off and inserted into the top-placed plug hole in the pressure-resistant shell 510, and with the assistance of the booster and the guidance of the bottom-placed guide piece 570, the new sealing gasket can be quickly wrapped around along the annular groove of the plug head. After adjustment, the two ends of the new sealing gasket are distributed on both sides of the cutting edge of the cutting head 540, and are subjected to fluxing after being heated.

[0063] Therefore, the device can quickly replace and test the damaged sealing gasket 382 without complicated steps. Embodiment 2:

[0064] Combination Figure 1-Figure 8 As shown, based on the first embodiment, the base 210 is installed on the outer end of the hydraulic auxiliary pipe 330, the calibration end 250 is arranged in the inner cavity of the hydraulic auxiliary pipe 330, an annular groove is opened on the inner side of the nut 220, and the ends of the two plug rods 240 away from the calibration end 250 are clamped in the annular groove.

[0065] The cylindrical end of the flow control guide rod 350 that penetrates into the inner cavity of the hydraulic auxiliary pipe 330 is adapted and plugged into the end plate of the shield 360 that penetrates into the inner cavity of the hydraulic auxiliary pipe 330, and the top of the shield 360 is provided with an arc-shaped notch that seals the port of the adapter 370;

[0066] One of the hydraulic oil pipes 400 is connected to the adapter 370 .

[0067] By fixing the base 210 on the pad 110, and using multiple nuts to fix the combined hydraulic main pipe 311 and the hydraulic sub-pipe 330 on the base 210, the base 210 can provide a sufficiently stable and compressive support force for the hydraulic power assembly, thereby preventing the hydraulic sub-rod 381 from shaking due to excessive extension. When the nut 220 rotates counterclockwise, the two springs 230 elastically pull the two plug rods 240, and the calibration end 250 in the inner cavity of the hydraulic sub-pipe 330 will quickly reset, and finally move to the end of the inner cavity of the hydraulic sub-pipe 330, and provide double protection against deformation for the extension of the hydraulic sub-rod 381. Embodiment three:

[0068] Combination Figure 7-Figure 11 As shown, based on the first embodiment, the booster assembly 310 includes a hydraulic main pipe 311, the inner wall of the hydraulic main pipe 311 is provided with a slide groove, and a positioning buckle 312 and a first screw 313 threadedly installed in the hydraulic main pipe 311 are movably installed in the slide groove;

[0069] The positioning buckle 312 is in a semicircular structure as a whole, and a plug hole is provided on the outside of the positioning buckle 312, and the first screw rod 313 penetrates through the column head at the inner end of the hydraulic main pipe 311 and is clamped in the plug hole;

[0070] The propulsion assembly 380 includes a hydraulic sub-rod 381 disposed inside the hydraulic main pipe 311 , a sealing gasket 382 installed on the inner end plug of the hydraulic sub-rod 381 by bolts, and an anti-seepage plug 383 disposed in the annular groove of the inner end plug of the hydraulic sub-rod 381 .

[0071] The hydraulic sub-pipe 330 and the hydraulic main pipe 311 are fixed by using multiple combination bolts. At this time, the gasket 320 can provide anti-seepage protection for the port where the hydraulic sub-pipe 330 and the hydraulic main pipe 311 are connected. When the hydraulic sub-pipe 330 and the hydraulic main pipe 311 are tightened, the formed cylindrical cavity can cooperate with the pressure-resistant shell 510 to provide a quick inspection window for the plug at the inner end of the hydraulic sub-rod 381. At the same time, the first screw 313 is controlled to push the positioning buckle 312 to fix the sealing gasket 382. At this time, the inner cavity of the hydraulic main pipe 311 can form a blocked state, and the cylindrical cavity will not be subjected to the subsequent pressure of the hydraulic oil. Therefore, the preset inspection window can prevent the problem of overflow caused by excessive hydraulic oil pressure during the replacement of the damaged anti-seepage plug 383. Embodiment 4:

[0072] Combination Figure 6-Figure 11 As shown, in the above embodiment, a heating resistance wire is arranged inside the cutting head 540, and a triangular cutter head is provided at the inner end of the cutting head 540;

[0073] The width of the cutting head 540 and the two guide members 570 is the same as the width of the annular groove of the plug head at the inner end of the hydraulic sub-rod 381;

[0074] A hole is formed inside the boost solenoid 560, and a wire 550 is disposed in the hole. The wire 550 passes through the two wires in the hole and is connected to the pole of the cut head 540;

[0075] The cutting head 540 is connected to a tension spring 530, and the other end of the tension spring 530 is connected to the inner wall of the pressure-resistant housing 510, so as to provide a restoring force for the cutting head 540;

[0076] The guide member 570 is L-shaped as a whole, and the end of the guide member 570 that penetrates into the inner cavity of the pressure-resistant shell 510 is provided with an arc-shaped slope, and the arc-shaped slope is provided with corrugated transverse grooves that increase friction resistance;

[0077] A through hole is provided inside the guide member 570 for guiding the washing pipe 600 to extend therein, and the through hole is used to provide a guide for the external booster and the new sealing gasket.

[0078] After the annular groove of the plug at the inner end of the hydraulic sub-rod 381 is cleaned with cleaning liquid, the annular groove can be kept clean, and the new sealing gasket can be delivered along the top socket of the pressure-resistant shell 510 by using an external booster, and the bottom guide 570 is used to provide guidance for the new sealing gasket. At this time, under the auxiliary pressure of the external booster, the new sealing gasket can be arranged around the annular groove of the plug. At the same time, the preheated cut head 540 heat-melts the two ends of the new sealing gasket until the cut head 540 is withdrawn, and the heat-melted two ends can be soldered. Finally, under the pressure of the booster, the two ends of the soldering can be pressed tightly until a ring structure is formed.

[0079] The working principle and use process of the present invention are as follows: when there is a pre-pressure imbalance in the hydraulic power system in the central injection molding machine, the pressure of the hydraulic sub-rod pushing the upper mold will be unbalanced, which will affect the efficiency and quality of injection molding. Traditionally, the maintenance of the hydraulic power system of a medium-sized injection molding machine requires taking it out completely. Due to the influence of the location of the machine tool, the above operation will increase the work intensity of the workers.

[0080] The device is improved on the traditional medium-sized hydraulic power system by setting the integral hydraulic parts into a multi-section split structure, installing a calibration pressure-bearing mechanism 200 on the outside of the pad 110, and using the calibration pressure-bearing mechanism 200 to provide a centering bearing capacity for the multi-section hydraulic mechanism 300 as a whole. When the anti-seepage plug 383 slides along the inner wall of the hydraulic main pipe 311 in the hydraulic oil for a long time and wears and breaks, the nut 220 can be adjusted to rotate clockwise on the threaded end pipe outside the base 210 until the two plugs are After the calibration end 250 is pushed toward the middle of the inner cavity of the hydraulic sub-pipe 330 by the 240, the propulsion assembly 380 can be stretched outward as a whole until the plug at the inner end of the hydraulic sub-rod 381 moves to the cylindrical cavity of the hydraulic main pipe 311 and the hydraulic sub-pipe 330, and the operator can adjust the hexagonal end of the outer end of the first screw rod 313 until the inner end of the first screw rod 313 pushes the positioning buckle 312 to clamp the outer ring groove of the sealing gasket 382, ​​and the fixed sealing gasket 382 can block the hydraulic oil in the inner cavity of the hydraulic main pipe 311;

[0081] Then, the control shield 360 is extended toward the inner cavity of the hydraulic auxiliary pipe 330 until the column head of the flow control guide rod 350 penetrates into the inner cavity of the hydraulic auxiliary pipe 330 and is inserted into the hole inside the shield 360. At this time, the arc structure formed by the shield 360 and the flow control guide rod 350 can block the adapter 370 and a connected hydraulic oil pipe 400, and the plug at the inner end of the hydraulic sub-rod 381 and the anti-seepage plug 383 will penetrate into the inner cavity of the pressure-resistant shell 510. At this time, the two gaskets 520 arranged inside the pressure-resistant shell 510 can seal the two ends of the plug at the inner end of the hydraulic sub-rod 381. At this time, the anti-seepage plug 383 will be located in the middle of the two gaskets 520. , and the annular groove on the plug at the inner end of the hydraulic sub-rod 381 can be symmetrical with the ends of the inner ends of the two guide members 570, then take out the bottom cover 590, and extend one of the washing pipes 600 along the plug hole inside the bottom guide member 570, then drain the hydraulic oil in the annular groove of the plug at the inner end of the hydraulic sub-rod 381, then take out the other top cover 590, and insert the other washing pipe 600 into the other top guide member 570, and then use the washing liquid for removing oil stains to input from the top washing pipe 600 into the annular groove of the plug, and discharge it outward from the bottom washing pipe 600 until the annular groove of the plug is thoroughly cleaned.

[0082] Then adjust the boost screw 560 until the inner end of the boost screw 560 pushes the cutter head 540 to cut off the damaged anti-seepage plug 383 in the annular groove, then take out the two guide pieces 570, and use a steel wire to guide the cut anti-seepage plug 383 remaining in the annular groove out of the socket at the bottom of the pressure-resistant shell 510, then use the cleaning liquid to rinse the clean annular groove of the plug again, and then re-cut a new plug pad according to the circumference of the annular groove, and use a booster to push the new plug pad from the socket at the top of the pressure-resistant shell 510, and at the same time insert a bottom guide piece 570 into the socket at the bottom of the pressure-resistant shell 510, and the booster pushes the new plug pad to be arranged in a ring along the annular groove of the plug, and finally, under the guidance of the arc surface of the inner end of the bottom guide piece 570, the new plug pad can be evenly distributed in the annular groove of the plug, and the cutter head 540 extending into the annular groove will provide constraints for the end of the new plug pad.

[0083] When the new plug pad is completely filled into the annular groove of the plug head, the two ends of the new plug pad can be attached to the two sides of the inner end blade of the cutting head 540. As the wire 550 is energized, the resistance wire inside the cutting head 540 will heat up until the two ends of the new plug pad are thermally melted. When the cutting head 540 is withdrawn, the continuous pushing of the booster rod on the plug pad can cause the thermally melted ends at both ends of the plug pad to be column welded, and the hydraulic sub-rod 381 and the anti-seepage plug 383 can be reset in the above manner. At this time, the device can quickly replace the anti-seepage plug 383 on the inner end plug of the hydraulic sub-rod 381 without disassembly.

[0084] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mold clamping mechanism for an injection molding machine, comprising a mold clamping assembly (100), two hydraulic oil pipes (400) and two washing pipes (600), characterized in that: It also includes a calibration pressure-bearing mechanism (200) installed on the mold locking assembly (100), a multi-stage hydraulic mechanism (300) installed on the calibration pressure-bearing mechanism (200), and a cleaning and pad changing mechanism (500) installed in the multi-stage hydraulic mechanism (300); The clamping assembly (100) is used to provide a stable compression molding platform for the upper mold and the lower mold; The calibrated pressure-bearing mechanism (200) is used to bear the multi-stage hydraulic mechanism (300) and provide a central pressure resistance for its operation; The multi-stage hydraulic mechanism (300) comprises a boosting assembly (310), a propulsion assembly (380) arranged in the boosting assembly (310), and a hydraulic auxiliary pipe (330) arranged on the boosting assembly (310); The two hydraulic oil pipes (400) are used to inject cleaning liquid into the inspection window in the cleaning pad changing mechanism (500); The cleaning and pad changing mechanism (500) comprises a pressure-resistant shell (510) arranged in a hydraulic auxiliary pipe (330), two guide members (570) arranged in two slots inside the pressure-resistant shell (510), two washers (520) arranged in the pressure-resistant shell (510), and a cutting head (540) arranged in the pressure-resistant shell (510); The two washing pipes (600) are used to provide hydraulic oil for thrust to the multi-stage hydraulic mechanism (300); The booster assembly (310) comprises a hydraulic main pipe (311), the inner wall of the hydraulic main pipe (311) is provided with a slide groove, and a positioning buckle (312) and a first screw rod (313) threadedly installed in the hydraulic main pipe (311) are movably installed in the slide groove; The positioning buckle (312) is in a semicircular structure as a whole, and a plug hole is provided on the outside of the positioning buckle (312), and the first screw rod (313) penetrates through the column head at the inner end of the hydraulic main pipe (311) and is clamped in the plug hole; The propulsion assembly (380) comprises a hydraulic sub-rod (381) disposed inside the hydraulic main pipe (311), a sealing gasket (382) mounted on the plug head at the inner end of the hydraulic sub-rod (381) by means of bolts, and an anti-seepage plug (383) disposed in the annular groove of the plug head at the inner end of the hydraulic sub-rod (381); The cleaning and pad changing mechanism (500) further comprises a control bolt (580) disposed in the guide member (570) and threadedly mounted in the pressure-resistant housing (510), a sealing cover (590) mounted in a threaded port at the outer end of the guide member (570), and a pressurizing solenoid (560) movably mounted in the middle of the pressure-resistant housing (510); The boosting solenoid (560) has a hole formed inside, and a wire (550) is arranged in the hole. The wire (550) passes through two wires in the hole and is connected to the pole of the cutting head (540). The cutting head (540) is connected to a tension spring (530), and the other end of the tension spring (530) is connected to the inner wall of the pressure-resistant housing (510), so as to provide a restoring force for the cutting head (540); A heating resistance wire is arranged inside the cutting head (540), and a triangular cutter head is provided at the inner end of the cutting head (540); The width of the cutting head (540) and the two guide members (570) is the same as the width of the annular groove of the plug head at the inner end of the hydraulic sub-rod (381); The guide member (570) is in an L-shaped structure as a whole, and the end of the guide member (570) that penetrates into the inner cavity of the pressure-resistant shell (510) is provided with an arc-shaped slope surface, and the arc-shaped slope surface is provided with corrugated transverse grooves that increase friction resistance; The guide member (570) is provided with a through hole inside for guiding the washing pipe (600) to extend therein, and the through hole is used to provide guidance for the external booster member and the new sealing gasket.

2. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The calibration pressure-bearing mechanism (200) comprises a base (210), the base (210) having two transverse holes formed therein, two insertion rods (240) disposed in the two transverse holes, a calibration end (250) mounted on the two insertion rods (240), a spring (230) fixedly mounted on the other end of the insertion rod (240), and a nut (220) mounted on an external threaded end tube of the base (210); The base (210) is mounted on the outer end of the hydraulic auxiliary pipe (330); The calibration end head (250) is arranged in the inner cavity of the hydraulic auxiliary pipe (330); An annular groove is provided on the inner side of the nut (220), and the ends of the two insertion rods (240) away from the calibration end (250) are clamped in the annular groove.

3. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The multi-stage hydraulic mechanism (300) further comprises a gasket (320) and an adapter (370), a clamping plate (340) mounted on the hydraulic auxiliary pipe (330), a flow control guide rod (350) mounted in the clamping plate (340), and a protective cover (360) disposed in the hydraulic auxiliary pipe (330); The columnar end of the flow control guide rod (350) that penetrates into the inner cavity of the hydraulic auxiliary pipe (330) is adapted to be plugged into the end plate of the protective cover (360) that penetrates into the inner cavity of the hydraulic auxiliary pipe (330), and the top of the protective cover (360) is provided with an arc-shaped notch that seals the port of the adapter (370); One of the hydraulic oil pipes (400) is connected to the adapter (370).

4. The mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The mold locking assembly (100) comprises a backing plate (110), two beams (120) mounted inside the backing plate (110), a pressure-bearing member (130) mounted at the outer ends of the two beams (120), an upper mold carrier plate (140) movably mounted on the two beams (120), and a linkage frame (150) connected between the backing plate (110) and the upper mold carrier plate (140); The hydraulic sub-rod (381) penetrates into the pad (110) and is used to provide a constant driving force for the linkage frame (150).

5. The mold clamping mechanism of an injection molding machine according to claim 4, characterized in that: The end surface of the upper mold carrier plate (140) close to the pressure-bearing member (130) is used to provide a pressure-increasing platform for the upper mold, and the inner side of the pressure-bearing member (130) is used to provide a pressure-resistant platform for the lower mold.

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