Double-station mold alternate injection external pressure holding system

Abstract

The invention relates to the field of injection molding production equipment, and specifically refers to a double-station mold alternating injection molding external pressure-maintaining system, comprising an injection molding machine and a control system, wherein a double-station mold changing table, a first mold pressure-maintaining mechanism and a second mold pressure-maintaining mechanism are arranged on the mold feed side of the injection molding machine, and guide slide rail mechanisms are respectively arranged on the movable mold magnetic template and the fixed mold magnetic template in the injection molding cavity of the injection molding machine, and the double-station mold changing table comprises a support frame, and the support frame is provided with a push-pull lifting mechanism and a shifting mechanism from top to bottom at intervals, and the shifting mechanism is provided with a moving platform, and the moving platform is provided with a first mold pressure-maintaining mechanism and a second mold pressure-maintaining mechanism in parallel, and the first mold pressure-maintaining mechanism or the second mold pressure-maintaining mechanism is driven by the push-pull lifting mechanism to enter the injection molding cavity and be slidably connected with the guide slide rail mechanism and extruded and injected through the movable mold magnetic template and the fixed mold magnetic template. The invention has high injection molding production efficiency, can maintain pressure outside the machine, has high workpiece output, and is convenient and fast to operate.

Description

Technical Field

[0001] The invention relates to the field of injection molding production equipment, in particular to an external pressure-maintaining system for alternating injection molding of double-station molds. Background Art

[0002] Injection molding machine, also known as injection molding machine, began to develop rapidly in plastic machinery with the advent of the first screw-type plastic injection molding machine in the 1950s. In modern production, a large number of plastic products are widely used in automobiles, home appliances, electronics, daily necessities, industrial materials and other fields. The application of injection molding machines has become indispensable. In recent years, with the advancement of Industry 4.0, the injection molding industry has also begun to develop step by step towards unmanned production, automated production, and flexible production. Chinese patent CN202439154U, named injection molding machine mold automatic replacement system, includes a mobile mold changing table, the mold changing table cooperates with the template mold changing frame of the injection molding machine, the replaced mold is installed on the template mold changing frame through the mold changing table, and the mold changing table is equipped with an electronic control system. The mold changing platform comprises a movable platform body and a fixed platform, the movable platform body is provided with at least one group of mold changing rollers for moving the mold, and a mold positioning cylinder is provided between the mold changing rollers; the movable platform body is installed on a linear track of the fixed platform, and a reduction motor I is also provided on the movable platform body, the reduction motor I is connected to the ball screw on the fixed platform, and the movable platform body is driven to move by the cooperation of the reduction motor I and the ball screw, the mold changing platform comprises a movable vehicle body, and at least one group of mold changing rollers for moving the mold is also provided on the movable vehicle body, and a mold positioning cylinder is provided between the mold changing rollers; the movable vehicle body is installed on a guide rail on the ground, and a reduction motor I is provided on the movable vehicle body, and the reduction motor I drives the wheels of the movable vehicle body to move on the guide rail, and the mold changing rollers are connected to the reduction motor I The mold changing platform is connected by a belt or chain. A transition mold changing platform is provided between the mold changing platform and the template mold changing frame of the injection molding machine. The transition mold changing platform includes a transition platform body. A transition mold changing roller for moving the mold is provided on the transition platform body. A reduction motor II is provided on the transition platform body. The reduction motor II is connected to the transition mold changing roller through a belt or chain. The template mold changing frame is equipped with a set on each of the fixed template and the movable template of the injection molding machine. The template mold changing frame is equipped with rollers. The reduction motor III drives the rollers to rotate through a chain or belt. The mold is connected to the template mold changing frame through a mold clamp. The electric control system is a PLC control system. The above patent realizes that a set of mold changing system serves one or more injection molding machines, and the molds are replaced in turn to realize the rapid replacement of molds. Similar patents There is also Chinese patent CN204749113U, entitled "An automatic mold changing device for an injection molding machine", Chinese patent CN109940824A, entitled "System and method for automatic mold handling and mold changing in an unmanned state", etc. However, in the above patents, when the mold is produced inside the injection molding machine, the mold needs to be subjected to long-term pressure and heat preservation operations in the injection molding machine. During this operation, the injection molding machine cannot perform other work, and the part can only be taken out for the next injection molding after a specific time has passed, which seriously affects the production efficiency and use efficiency of the injection molding machine. If two injection molding machines are used, although the overall mold changing efficiency is improved, the working efficiency of a single injection molding machine is still not improved, and the simultaneous operation of two injection molding machines also increases the production cost of the workpiece. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a double-station mold alternating injection and external pressure holding system with alternating injection, external pressure holding, high production efficiency, convenient operation, and energy and labor saving.

[0004] A double-station mold alternating injection external pressure-holding system comprises an injection molding machine and a control system, characterized in that: a double-station mold changing platform, a first mold pressure-holding mechanism and a second mold pressure-holding mechanism are provided on the die feed side of the injection molding machine, a guide slide mechanism is respectively provided on the movable mold magnetic template and the fixed mold magnetic template in the injection molding cavity of the injection molding machine, the guide slide mechanism is connected to the movable mold magnetic template or the fixed mold magnetic template, the double-station mold changing platform comprises a support frame, the support frame is provided with a push-pull lifting mechanism and a transposition mechanism at intervals from top to bottom, the push-pull lifting mechanism and the transposition mechanism are respectively connected to the support frame, a moving platform is provided on the transposition mechanism, the moving platform is driven by the transposition mechanism, and the moving platform is provided with The first mold pressure-holding mechanism and the second mold pressure-holding mechanism are respectively slidably connected to the moving platform. The first mold pressure-holding mechanism or the second mold pressure-holding mechanism is alternately connected to the push-pull lifting mechanism above it after being driven and transposed by the transposition mechanism. The first mold pressure-holding mechanism or the second mold pressure-holding mechanism is driven by the push-pull lifting mechanism to enter the injection cavity and is slidably connected to the guide slide rail mechanism and is extruded and injected through the movable mold magnetic template and the fixed mold magnetic template, so that the first mold pressure-holding mechanism and the second mold pressure-holding mechanism alternately enter the injection molding machine for injection, and then are pulled out and pressure-held by the mold pressure-holding mechanism. In this process, the injection molding machine is not idle, thereby improving the use efficiency of the injection molding machine.

[0005] The first mold pressure-keeping mechanism and the second mold pressure-keeping mechanism of the present invention respectively include a mold movable template, a mold fixed template, a cushion block and a mold magnetic template. The mold movable template and the mold fixed template are arranged in parallel with a relative interval. Mold magnetic templates are respectively provided on both sides of the mold movable template, and the mold magnetic template is fixedly connected to the mold movable template. The mold magnetic template is connected to a control system, and cushion blocks are respectively provided on both sides of the mold fixed template, and the cushion blocks are fixedly connected to the mold fixed template. The mold magnetic template and the cushion blocks are tightly connected to the cushion blocks through the magnetic force of the mold magnetic template so that a mold pressure-keeping space is formed between the mold movable template and the mold fixed template, so that when two matching molds are placed between the mold movable template and the mold fixed template, pressure-keeping surfaces are respectively formed in the middle of the mold movable template and the middle of the mold fixed template and cooperate with the outer surface of the mold, which is convenient for extruding the mold. The mold magnetic template realizes the connection and separation of the mold movable template and the mold fixed template through the charging and demagnetization operation. When the mold fixed template and the mold fixed template are magnetized by the mold magnetic template, the mold can be tightly locked, which is convenient for the mold to be pressure-held by the mold pressure-keeping mechanism outside the injection molding machine.

[0006] The transposition mechanism of the present invention comprises a transposition linear guide rail, a transposition slider, a transposition ball screw, a nut, a nut mounting seat, a connecting plate, a ball screw mounting plate, a transposition motor, a first mold slideway and a second mold slideway, a transposition bracket is provided in the middle of the support frame, the transposition bracket is fixedly connected to the support frame, the left and right ends of the transposition bracket are respectively provided with transposition linear guide rails, a transposition ball screw is provided in the middle of the transposition bracket, the transposition ball screw and the transposition linear guide rail are parallel to each other, a nut is sleeved on the transposition ball screw, the nut is fixedly connected to the nut mounting seat, a connecting plate is provided below the transposition ball screw, a ball screw mounting plate is provided on the connecting plate at intervals, both ends of the connecting plate are fixedly connected to the transposition bracket, the front and rear ends of the transposition ball screw are respectively connected to the ball screw mounting plate via bearings, one end of the transposition ball screw passes through the ball screw mounting plate and is fixedly connected to the output shaft of the transposition motor via a coupling, the transposition motor is fixed on the transposition bracket, and the transposition motor The cam is connected to the control system, the lower end of the mobile platform is hinged with the nut mounting seat, and the two sides of the lower end of the mobile platform are slidably connected with the transposition linear guide rails through a transposition slider, so as to facilitate the transposition ball screw driven by the transposition motor to rotate, and the nut mounting seat drives the mobile platform to move back and forth on the transposition bracket for transposition. The mobile platform is provided with a first mold slide and a second mold slide in parallel, the first mold slide is two guide slides arranged in parallel at intervals, and the second mold slide is two guide slides arranged in parallel at intervals, and the lower end of the guide slide is fixedly connected to the mobile platform, the first mold pressure holding mechanism is slidably connected to the first mold slide, and the second mold pressure holding mechanism is slidably connected to the second mold slide, so as to facilitate supporting the first mold pressure holding mechanism and the second mold pressure holding mechanism through the first mold slide and the second mold slide, and the mobile platform is driven to transpose by the transposition motor so that the first mold slide and the second mold slide are alternately docked with the guide slide mechanism in the injection molding machine.

[0007] The push-pull lifting mechanism of the present invention comprises a push-pull mechanism and a lifting mechanism, wherein the push-pull mechanism comprises a push-pull hook bracket, a push-pull linear guide rail, a push-pull slider, a push-pull ball screw, a push-pull ball screw mounting plate, a nut, a nut mounting seat, a synchronous wheel, a synchronous belt, a push-pull motor, a push-pull hook fixing seat and a push-pull hook, wherein push-pull linear guide rails are respectively arranged on the front and rear sides of the lower end of the push-pull hook bracket, a push-pull ball screw is arranged in the middle of the push-pull hook bracket, and ball screw mounting plates are respectively arranged on the left and right ends of the push-pull hook bracket, the push-pull linear guide rail is perpendicular to the transposition linear guide rail, the upper end of the push-pull linear guide rail is fixedly connected to the push-pull hook bracket, the two ends of the push-pull ball screw are respectively connected to the ball screw mounting plate via bearings, and a screw is sleeved on the push-pull ball screw The nut is fixedly connected to the nut mounting seat, one end of the push-pull ball screw passes through the ball screw mounting plate and is provided with a synchronous wheel, the synchronous wheel is fixedly connected to the push-pull ball screw, the synchronous wheel is connected to the synchronous wheel on the output shaft of the push-pull motor via a synchronous belt, the push-pull motor is fixed on the push-pull hook bracket, the push-pull motor is connected to the control system, the push-pull hook fixing seat is located below the push-pull hook bracket, the front and rear ends of the push-pull hook fixing seat are respectively slidably connected to the push-pull linear guide rail via a push-pull slider, the middle of the push-pull hook fixing seat is fixedly connected to the nut mounting seat at the lower end of the push-pull ball screw, a push-pull hook is fixed to the lower end of the push-pull hook fixing seat, the first mold pressure holding mechanism or the second mold pressure holding mechanism is provided with a push-pull handle at the end away from the injection molding machine, the push-pull handle One end is fixedly connected to the cushion block, and the other end is cooperatively connected with the push-pull hook, so as to facilitate the first mold pressure-holding mechanism or the second mold pressure-holding mechanism to move and replace between the injection molding machine and the double-station mold changing table through the push-pull hook. A lifting mechanism is arranged on the upper end of the push-pull hook bracket, and the lifting mechanism includes a fixed plate, a lifting plate, a cylinder, a limit screw, a guide rod, a floating joint, a first oil-free bushing, a second oil-free bushing, a screw, a spring support, a spring, a gasket and a nut. The fixed plate is located at the upper end of the support frame, and the two ends of the fixed plate are respectively fixedly connected to the support frame. A lifting plate parallel to the fixed plate is arranged under the fixed plate, and the lower end of the lifting plate is fixedly connected to the upper end of the push-pull hook bracket, a cylinder is arranged in the middle of the lifting plate, and guide rods are respectively arranged on the four corners of the lifting plate. The fixed plate is provided with a guide hole and a limit hole, one end of the cylinder is fixedly connected to the fixed plate, and the other end is fixedly connected to the lifting plate via a floating joint, the cylinder is connected to a control system, limit screws are respectively provided on both sides of the cylinder, the lower ends of the limit screws pass through the limit holes and are fixedly connected to the lifting plate, the lower end of the guide rod is fixedly connected to the lifting plate, and the upper end passes through the first oil-free bushing and the second oil-free bushing in sequence and is placed on the upper end of the fixed plate, the first oil-free bushing is located between the lifting plate and the fixed plate, the first oil-free bushing is slidably connected to the guide rod, the second oil-free bushing is located in the guide hole, the outer wall of the second oil-free bushing is fixedly connected to the fixed plate, and the inner wall is slidably connected to the guide rod, a threaded hole is provided in the middle of the upper end of the guide rod, and the lower end of the screw is threadedly connected to the guide rod via a thread,The screw rod passes through the spring support, spring, gasket and nut from bottom to top and is threadedly connected to the nut. The lower end of the spring support contacts the upper end surface of the fixed plate, and the upper end contacts the spring, so as to facilitate the cylinder to drive the lifting plate and then drive the push-pull hook bracket to move up and down. The guide rod provides guidance for the lifting plate to rise and fall, and the maximum stroke of the cylinder is limited by the spring and the limit screw.

[0008] The guide slide rail mechanism described in the present invention includes a guide slide rail and a guide rail support seat. The lower end of the movable mold magnetic template and the lower end of the fixed mold magnetic template are respectively provided with guide rail support seats. The guide rail support seat is provided with a guide slide rail. The guide slide rail and the guide slide rail are arranged at the same height. The guide rail support seat is fixedly connected to the movable mold magnetic template or the fixed mold magnetic template. The lower end of the guide slide rail is fixedly connected to the guide rail support seat to facilitate the docking of the guide slide rail and the guide slide rail, so as to facilitate the first mold pressure holding mechanism or the second mold pressure holding mechanism to slide from the first mold slide or the second mold slide onto the guide slide rail in the injection molding machine.

[0009] The lower end of the mold movable template and the lower end of the mold fixed template of the present invention are respectively provided with guide sliders, and the lower two sides of the opposite surfaces of the mold movable template and the mold fixed template are respectively provided with positioning mechanisms, the guide slider is fixedly connected to the mold movable template or the mold fixed template, and grooves are respectively provided on the guide slide rail and the guide slide rail, and the guide slider is slidably connected with the guide slide rail or the guide slide rail to facilitate improving the accuracy of the mold pressure holding mechanism sliding from the mold slideway into the guide slide rail between the movable mold magnetic template and the fixed mold magnetic template. The positioning mechanism includes a fixed seat, a connecting plate, a first adjusting plate, a second adjusting plate and an adjusting screw, a first adjusting plate and a second adjusting plate are provided between the fixed seat and the connecting plate, and a There is an opening groove opening downward, and fixing seats on both sides of the opening groove are provided with fixing threaded holes, and the opening groove is provided with a first adjustment plate and a second adjustment plate in sequence from top to bottom, the lower end surface of the first adjustment plate is an inclined surface and contacts with the upper end surface of the second adjustment plate, the first adjustment plate is provided with a transversely penetrating adjustment plate threaded hole, the adjusting screw passes through the fixing threaded hole and the adjusting plate threaded hole and is threadedly connected to the first adjusting plate, the second adjusting plate is provided with two vertical threaded grooves at intervals, the second adjusting plate is fixedly connected to the fixing seat by screws passing through the vertical threaded grooves, the lower end surface of the second adjusting plate is an inclined surface, the connecting plate covers the fixing seat, the first adjusting plate and the second adjusting plate, and the connecting plate The upper end and the periphery are fixedly connected to the mold movable template or the mold fixed template through screws passing through the connecting plate and the fixing seat, so as to facilitate adjusting the inclination of the lower end surface of the second adjusting plate and the height of the second adjusting lower end leaking out of the fixing seat by rotating the adjusting screw. Positioning blocks are respectively provided on both sides of the lower end of the movable mold magnetic template and the lower end of the fixed mold magnetic template. The upper end surface of the positioning block is inclined and matched with the lower end surface of the second adjusting plate. The positioning block is spaced apart from the guide rail. The height of the upper end surface of the positioning block is higher than the height of the upper end surface of the guide rail. A positioning block fixing plate is provided at the lower end of the positioning block. The upper end of the positioning block fixing plate is fixedly connected to the positioning block, and the side surface of the positioning block fixing plate is fixedly connected to the guide rail support seat, so as to facilitate the movable mold magnetic The guide slides on the template and the fixed mold magnetic template are docked with the guide slides on the first mold slide or the second mold slide. The first mold pressure holding mechanism or the second mold pressure holding mechanism slides onto the guide slide via the guide slide driven by the push-pull hook and is placed between the dynamic mold magnetic template and the fixed mold magnetic template of the injection molding machine. The lower end surface of the second adjustment plate of the positioning mechanism at the lower end of the first mold pressure holding mechanism or the second mold pressure holding mechanism cooperates with the positioning block to lift the first mold pressure holding mechanism or the second mold pressure holding mechanism. At this time, the guide slider at the lower end of the first mold pressure holding mechanism or the second mold pressure holding mechanism is separated from the guide slide, which facilitates the dynamic mold magnetic template and the fixed mold magnetic template to extrude the first mold pressure holding mechanism or the second mold pressure holding mechanism to perform mold injection.

[0010] The groove on the guide rail and the groove on the guide rail of the present invention are both V-shaped in cross-section, the lower end cross-section of the guide slider is V-shaped, and the width of the lower end of the guide slider is smaller than the width of the guide rail or the V-shaped groove on the guide rail, so that the first mold pressure-holding mechanism or the second mold pressure-holding mechanism can move forward and backward within a small range during the left and right movement between the mobile platform and the injection molding machine, thereby improving the positioning accuracy of the first mold pressure-holding mechanism or the second mold pressure-holding mechanism, and at the same time ensuring that when the mold enters the injection molding machine, the mold fixed template or the mold fixed template does not contact the dynamic mold magnetic template and the fixed mold magnetic template in the injection molding machine.

[0011] According to the present invention, the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism is respectively provided with limit rods on both sides of one end facing the injection molding machine, the limit rods are fixedly connected to the mold movable template or the mold fixed template, and the fixed mold magnetic template or the movable mold magnetic template is provided with a limit plate on the upper side of the right end along the direction in which the mold enters the injection molding machine, and the limit plate is fixedly connected to the fixed mold magnetic template or the movable mold magnetic template. When the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism enters the injection molding machine, the limit rods abut against the limit plate to limit the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism, so as to facilitate the rapid positioning of the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism to the accurate position where it enters the injection molding machine.

[0012] According to the present invention, a limit baffle is symmetrically provided at the front and rear ends of the left end of the first mold slide, and a limit baffle is symmetrically provided at the front and rear ends of the left end of the second mold slide. The limit baffle is fixedly connected to the left end of the guide slide rail, and a limit block is respectively provided at the left end of the first mold slide and the left end of the second mold slide. The limit block is fixedly connected to the mobile platform to facilitate the rapid positioning of the first mold pressure holding mechanism or the second mold pressure holding mechanism back to the position on the mobile platform through the limit baffle.

[0013] The cylinder of the present invention is respectively provided with limit screws on both sides, and the fixing plate is provided with limit holes. The lower end of the limit screw passes through the limit hole and is fixedly connected with the lifting plate to facilitate controlling the pushing stroke of the cylinder. When the lifting plate descends to a certain position, the head of the limit screw is stuck at the upper end of the limit hole on the fixing plate to prevent the cylinder from extending too long.

[0014] The first oil-free bushing of the present invention is provided with a limiting vertical plate on its side, the limiting vertical plate side is fixedly connected to the outer wall of the oil-free bushing, the upper end of the limiting vertical plate is fixedly connected to the limiting horizontal plate, and the limiting horizontal plate is fixedly connected to the fixed plate, so as to improve the stability of the lifting mechanism through the limiting vertical plate and the limiting horizontal plate.

[0015] The present invention has the advantages of alternating injection molding, pressure maintenance outside the machine, high production efficiency, convenient operation, power saving and labor saving, etc. due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 The present invention Figure 1 Side view of.

[0018] Figure 3 The present invention Figure 2 A is an enlarged view.

[0019] Figure 4 It is a structural schematic diagram of the double-station die-changing station in the present invention.

[0020] Figure 5 The present invention Figure 4 Rear view of.

[0021] Figure 6 It is a structural schematic diagram of the position changing mechanism and the moving platform on the double-station die changing table of the present invention.

[0022] Figure 7 The present invention Figure 6 Schematic diagram of the partial structure of the lower end transposition mechanism after the middle mobile platform is lifted.

[0023] Figure 8 It is a structural schematic diagram of the push-pull lifting mechanism of the present invention.

[0024] Fig. 9 It is a bottom view of the push-pull lifting mechanism of the present invention.

[0025] Fig.10 It is a side view of the push-pull lifting mechanism of the present invention.

[0026] Fig.11 The present invention Fig.10 Enlarged view of point B in the middle.

[0027] Fig.12 It is a partial cross-sectional view of the push-pull mechanism in the present invention.

[0028] Fig.13 It is a structural schematic diagram of the first mold pressure-maintaining mechanism or the second mold pressure-maintaining mechanism in the present invention.

[0029] Fig.14 The present invention Fig.13 Rear view of.

[0030] Fig.15 The present invention Fig.13 Partial cross-sectional view.

[0031] Fig.16 The present invention Fig.13 Another partial sectional view of .

[0032] Fig.17 It is a structural schematic diagram of the positioning mechanism in the present invention.

[0033] Fig.18 The present invention Fig.17 Partial cross-sectional view.

[0034] Fig.19 It is a schematic diagram of the structure on the mobile platform of the present invention.

[0035] Fig. 20 The present invention Fig.19 Enlarged view of center C.

[0036] Fig.21 The present invention Fig.19 Top view of the .

[0037] Fig. 22 It is a structural schematic diagram of the fixed mold magnetic template in the present invention.

[0038] Fig.23 It is a structural schematic diagram of the movable mold magnetic template in the present invention.

[0039] Fig.24 It is a schematic diagram of the connection between the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism and the fixed mold magnetic template in the present invention. DETAILED DESCRIPTION

[0040] The present invention is described below in conjunction with the accompanying drawings and embodiments.

[0041] A double-station mold alternating injection external pressure-holding system, comprising an injection molding machine 1 and a control system, characterized in that: the injection molding machine 1 is provided with a double-station mold changing platform 2, a first mold pressure-holding mechanism 9 and a second mold pressure-holding mechanism 10 on the mold feed side, and a guide slide mechanism 4 is respectively provided on the movable mold magnetic template 58 and the fixed mold magnetic template 59 in the injection cavity 3 of the injection molding machine 1, and the guide slide mechanism 4 is connected to the movable mold magnetic template 58 or the fixed mold magnetic template 59, and the double-station mold changing platform 2 includes a support frame 5, and the support frame 5 is provided with a push-pull lifting mechanism 7 and a transposition mechanism 6 from top to bottom, and the push-pull lifting mechanism 7 and the transposition mechanism 6 are respectively connected to the support frame 5, and the transposition mechanism 6 is provided with a moving platform 8, and the moving platform 8 is driven by the transposition mechanism 6. A first mold pressure-holding mechanism 9 and a second mold pressure-holding mechanism 10 are arranged in parallel on the top. The first mold pressure-holding mechanism 9 and the second mold pressure-holding mechanism 10 are respectively slidably connected to the movable platform 6. The first mold pressure-holding mechanism 9 or the second mold pressure-holding mechanism 10 is driven and displaced by the displacement mechanism 6 and is alternately connected to the push-pull lifting mechanism 7 above it. The first mold pressure-holding mechanism 9 or the second mold pressure-holding mechanism 10 is driven by the push-pull lifting mechanism 7 to enter the injection cavity 3 and is slidably connected to the guide slide rail mechanism 4 and is extruded and injected through the movable mold magnetic template 58 and the fixed mold magnetic template 59, so as to facilitate the first mold pressure-holding mechanism and the second mold pressure-holding mechanism to alternately enter the injection molding machine for injection, and then be pulled out and pressure-held by the mold pressure-holding mechanism. In this process, the injection molding machine is not idle, thereby improving the utilization efficiency of the injection molding machine.

[0042] The first mold pressure-holding mechanism 9 and the second mold pressure-holding mechanism 10 of the present invention respectively include a mold movable template 11, a mold fixed template 12, a cushion block 13 and a mold magnetic template 14, wherein the mold movable template 11 and the mold fixed template 12 are arranged in parallel with each other at a relative interval, and mold magnetic templates 14 are respectively arranged on both sides of the mold movable template 11, and the mold magnetic template 14 is fixedly connected to the mold movable template 11, and the mold magnetic template 14 is connected to the control system, and cushion blocks 13 are respectively arranged on both sides of the mold fixed template, and the cushion blocks 13 are fixedly connected to the mold fixed template 12, and the mold magnetic template 14 is connected to the cushion blocks 13. The magnetic force of the mold magnetic template 14 is tightly connected with the pad 13 to form a mold pressure holding space between the mold movable template 11 and the mold fixed template 12, so that when two matching molds are placed between the mold movable template and the mold fixed template, pressure holding surfaces are formed in the middle of the mold movable template and the middle of the mold fixed template respectively and match with the outer surface of the mold, which is convenient for extruding the mold. The mold magnetic template realizes the connection and separation of the mold movable template and the mold fixed template through the charging and demagnetization operation. When the mold fixed template and the mold fixed template are magnetized by the mold magnetic template, the mold can be tightly locked, which is convenient for the mold to be pressurized by the mold pressure holding mechanism outside the injection molding machine.

[0043] The transposition mechanism 6 of the present invention includes a transposition linear guide rail 27, a transposition slider, a transposition ball screw 28, a nut, a nut mounting seat, a connecting plate, a ball screw mounting plate, a transposition motor 30, a first mold slide 31 and a second mold slide 32, a transposition bracket 33 is provided in the middle of the support frame 5, the transposition bracket 33 is fixedly connected to the support frame 5, the left and right ends of the transposition bracket 33 are respectively provided with a transposition linear guide rail 27, the middle of the transposition bracket 33 is provided with a transposition ball screw 28, the transposition ball screw 28 and the transposition linear guide The rails 27 are parallel to each other, a nut is sleeved on the transposition ball screw 28, and the nut is fixedly connected to the nut mounting seat, a connecting plate is provided below the transposition ball screw 28, and a ball screw mounting plate is provided on the connecting plate at intervals, and both ends of the connecting plate are fixedly connected to the transposition bracket 33, and the front and rear ends of the transposition ball screw 28 are respectively connected to the ball screw mounting plate through bearings, and one end of the transposition ball screw 28 passes through the ball screw mounting plate and is fixedly connected to the output shaft of the transposition motor 30 through a coupling, and the transposition motor 30 is fixed on the transposition bracket 33. The above-mentioned transposition motor 30 is connected with the control system, the lower end of the mobile platform 8 is hinged with the nut mounting seat, and the two sides of the lower end of the mobile platform 8 are respectively slidably connected with the transposition linear guide rail 27 through the transposition slider, so as to facilitate the rotation of the transposition ball screw driven by the transposition motor, and the nut mounting seat drives the mobile platform to move back and forth on the transposition bracket for transposition, and the mobile platform 8 is provided with a first mold slide 31 and a second mold slide 32 in parallel, the first mold slide 31 is two guide slides 34 arranged in parallel at intervals, and the second mold slide 32 is two guide slides 34 arranged in parallel at intervals, and the lower end of the guide slide 34 is fixedly connected with the mobile platform 8, the first mold pressure holding mechanism 9 is slidably connected with the first mold slide 31, and the second mold pressure holding mechanism 10 is slidably connected with the second mold slide 32, so as to facilitate the support of the first mold pressure holding mechanism and the second mold pressure holding mechanism by the first mold slide and the second mold slide, and the mobile platform is transposed by the transposition motor, so that the first mold slide and the second mold slide are alternately docked with the guide slide mechanism in the injection molding machine.

[0044] The push-pull lifting mechanism 7 of the present invention comprises a push-pull mechanism 35 and a lifting mechanism 36. The push-pull mechanism 35 comprises a push-pull hook bracket 37, a push-pull linear guide 38, a push-pull slider, a push-pull ball screw 39, a push-pull ball screw mounting plate, a nut, a nut mounting seat, a synchronous wheel 40, a synchronous belt 41, a push-pull motor 69, a push-pull hook fixing seat 42 and a push-pull hook 43. The front and rear sides of the lower end of the push-pull hook bracket 37 are respectively provided with push-pull linear guides 38, the middle of the push-pull hook bracket 37 is provided with a push-pull ball screw 39, and the left and right ends of the push-pull hook bracket 37 are respectively provided with ball screw mounting plates. The push-pull linear guide 38 is perpendicular to the transposition linear guide 27, and the upper end of the push-pull linear guide 38 is connected to the push-pull hook bracket 3 7 is fixedly connected, the two ends of the push-pull ball screw 39 are respectively connected to the ball screw mounting plate through bearings, the push-pull ball screw 39 is sleeved with a nut, and the nut is fixedly connected to the nut mounting seat, one end of the push-pull ball screw 39 passes through the ball screw mounting plate and is provided with a synchronous wheel 40, the synchronous wheel 40 is fixedly connected to the push-pull ball screw 39, the synchronous wheel 40 is connected to the synchronous wheel on the output shaft of the push-pull motor 69 through a synchronous belt 41, the push-pull motor 69 is fixed on the push-pull hook bracket 37, the push-pull motor 69 is connected to the control system, the push-pull hook fixing seat 42 is located below the push-pull hook bracket 37, the front and rear ends of the push-pull hook fixing seat 42 are respectively slidably connected to the push-pull linear guide 38 through a push-pull slider, the push-pull hook fixing seat 42 is fixedly connected to the push-pull linear guide 38 through a push-pull slider, the push-pull hook fixing seat 42 is fixedly connected to the push-pull hook bracket 37 ... The middle of the fixed seat 42 is fixedly connected to the nut mounting seat at the lower end of the push-pull ball screw 39, and a push-pull hook 43 is fixed to the lower end of the push-pull hook fixed seat 42. The first mold pressure holding mechanism 9 or the second mold pressure holding mechanism 10 is provided with a push-pull handle 15 at the end away from the injection molding machine 1. One end of the push-pull handle 15 is fixedly connected to the cushion block 13, and the other end is matched with the push-pull hook 43 to facilitate the first mold pressure holding mechanism or the second mold pressure holding mechanism to be driven by the push-pull hook to move and replace between the injection molding machine and the double-station mold changing table. The upper end of the push-pull hook bracket 37 is provided with a lifting mechanism 36, and the lifting mechanism 36 includes a fixed plate 44, a lifting plate 45, a cylinder 46, a limit screw 66, a guide rod 47, a floating joint, a first oil-free bushing 48, and a second Oil-free bushing 49, screw 50, spring support 51, spring 52, gasket 53 and nut 54, the fixed plate 44 is located at the upper end of the support frame 5, and the two ends of the fixed plate 44 are fixedly connected to the support frame 5 respectively. A lifting plate 45 parallel to the fixed plate 44 is provided below the fixed plate 44, and the lower end of the lifting plate 45 is fixedly connected to the upper end of the push-pull hook bracket 37. A cylinder 46 is provided in the middle of the lifting plate 45, and guide rods 47 are provided on the four corners of the lifting plate 45 respectively. A guide hole and a limit hole are provided on the fixed plate 44, one end of the cylinder 46 is fixedly connected to the fixed plate 44, and the other end is fixedly connected to the lifting plate 45 via a floating joint. The cylinder 46 is connected to the control system, and limit screws 66 are provided on both sides of the cylinder 46.The lower end of the limit screw 66 passes through the limit hole and is fixedly connected to the lifting plate 45. The lower end of the guide rod 47 is fixedly connected to the lifting plate 45, and the upper end passes through the first oil-free bushing 48 and the second oil-free bushing 49 in sequence and is placed on the upper end of the fixed plate 44. The first oil-free bushing 48 is located between the lifting plate 45 and the fixed plate 44. The first oil-free bushing 48 is slidably connected to the guide rod 47. The second oil-free bushing 49 is located in the guide hole. The outer wall of the second oil-free bushing 49 is fixedly connected to the fixed plate 44, and the inner wall is slidably connected to the guide rod 47. A threaded hole is provided in the middle of the upper end of the guide rod 47, and the lower end of the screw rod 50 is threadedly connected to the guide rod 47 through a thread. The screw rod 50 passes through the spring support 51, the spring 52, the gasket 53 and the nut 54 from bottom to top and is threadedly connected to the nut 54. The lower end of the spring support 51 contacts the upper end surface of the fixed plate 44, and the upper end contacts the spring 52, so as to facilitate the lifting plate to be driven by the cylinder and then drive the push-pull hook bracket to move up and down. The guide rod provides guidance for the lifting plate to be lifted and lowered, and the maximum stroke of the cylinder is limited by the spring and the limit screw.

[0045] The guide slide mechanism 4 described in the present invention includes a guide slide 55 and a guide rail support seat 56. The lower end of the movable mold magnetic template 58 and the lower end of the fixed mold magnetic template 59 are respectively provided with a guide rail support seat 56. The guide rail support seat 56 is provided with a guide slide 55. The guide slide 55 is arranged at the same height as the guide slide 34. The guide rail support seat 56 is fixedly connected to the movable mold magnetic template 58 or the fixed mold magnetic template 59. The lower end of the guide slide 55 is fixedly connected to the guide rail support seat 56 to facilitate the docking of the guide slides with the guide slides, so as to facilitate the first mold pressure holding mechanism or the second mold pressure holding mechanism to slide from the first mold slide or the second mold slide onto the guide slide in the injection molding machine.

[0046] The lower end of the mold movable template 11 and the lower end of the mold fixed template 12 of the present invention are respectively provided with a guide slider 19, and the lower sides of the opposite surfaces of the mold movable template 11 and the mold fixed template 12 are respectively provided with a positioning mechanism 16, the guide slider 19 is fixedly connected to the mold movable template 11 or the mold fixed template 12, and the guide slide rail 55 and the guide slide rail 34 are respectively provided with a groove 65, and the guide slider 19 is slidably connected with the guide slide rail 55 or the guide slide rail 34 to facilitate improving the accuracy of the mold pressure holding mechanism sliding from the mold slideway into the guide slide rail between the movable mold magnetic template and the fixed mold magnetic template. The positioning mechanism 16 includes a fixed seat 20, a connecting plate 21, a first adjustment plate 22, a second adjustment plate 23 and an adjusting screw 24, and the A first adjustment plate 22 and a second adjustment plate 23 are provided between the fixing seat 20 and the connecting plate 21, and an opening groove opening downward is provided on the fixing seat 20, and fixing threaded holes 25 are provided on the fixing seat 20 on both sides of the opening groove, and the first adjustment plate 22 and the second adjustment plate 23 are provided in the opening groove from top to bottom in sequence, and the lower end surface of the first adjustment plate 22 is an inclined surface and contacts the upper end surface of the second adjustment plate 23, and a transversely penetrating adjustment plate threaded hole is provided on the first adjustment plate 22, and the adjusting screw 24 passes through the fixing threaded hole 25 and the adjusting plate threaded hole and is threadedly connected to the first adjustment plate 22, and two vertical threaded grooves 26 are provided on the second adjustment plate 23 at intervals, and the second adjustment plate 23 passes through the vertical threaded grooves 26 by the screw 6 is fixedly connected to the fixed seat 20, the lower end surface of the second adjustment plate 23 is an inclined surface, the connecting plate 21 covers the fixed seat 20, the first adjustment plate 22 and the second adjustment plate 23, the upper end and the periphery of the connecting plate 21 pass through the connecting plate 21, the fixed seat 20 and the mold movable template 11 or the mold fixed template 12 through screws, so as to facilitate adjusting the inclination of the lower end surface of the second adjustment plate and the height of the lower end of the second adjustment plate leaking out of the fixed seat by rotating the adjusting screws, and positioning blocks 57 are respectively provided on both sides of the lower end of the movable mold magnetic template 58 and both sides of the lower end of the fixed mold magnetic template 59, the upper end surface of the positioning block 57 is inclined and matched with the lower end surface of the second adjustment plate 23, the positioning block 57 is spaced apart from the guide rail 55, and the positioning block The height of the upper end surface of 57 is higher than the height of the upper end surface of the guide slide rail 55. The lower end of the positioning block 57 is provided with a positioning block fixing plate. The upper end of the positioning block fixing plate is fixedly connected to the positioning block 57, and the side of the positioning block fixing plate is fixedly connected to the guide rail support seat 56, so as to facilitate the docking of the guide rails on the movable mold magnetic template and the fixed mold magnetic template with the guide rails on the first mold slideway or the second mold slideway. The first mold pressure holding mechanism or the second mold pressure holding mechanism slides onto the guide rail through the guide rail driven by the push-pull hook and is placed between the movable mold magnetic template and the fixed mold magnetic template of the injection molding machine. The lower end surface of the second adjustment plate of the positioning mechanism at the lower end of the first mold pressure holding mechanism or the second mold pressure holding mechanism cooperates with the positioning block to lift the first mold pressure holding mechanism or the second mold pressure holding mechanism.At this time, the guide slide block at the lower end of the first mold pressure-holding mechanism or the second mold pressure-holding mechanism is separated from the guide rail, which facilitates the movable mold magnetic template and the fixed mold magnetic template to squeeze the first mold pressure-holding mechanism or the second mold pressure-holding mechanism for mold injection.

[0047] The groove on the guide rail 34 and the groove on the guide rail 55 of the present invention are both V-shaped in cross-section, and the lower end cross-section of the guide slider 19 is V-shaped. The width of the lower end of the guide slider 19 is smaller than the width of the V-shaped groove 65 on the guide rail 34 or the guide rail 55, so that the first mold pressure-holding mechanism or the second mold pressure-holding mechanism can move forward and backward within a small range during the left and right movement between the mobile platform and the injection molding machine, thereby improving the positioning accuracy of the first mold pressure-holding mechanism or the second mold pressure-holding mechanism, and at the same time ensuring that when the mold enters the injection molding machine, the mold fixed template or the mold fixed template does not contact the movable mold magnetic template and the fixed mold magnetic template in the injection molding machine.

[0048] According to the present invention, the first mold pressure-keeping mechanism 9 or the second mold pressure-keeping mechanism 10 is provided with limit rods 60 on both sides of one end facing the injection molding machine 1, and the limit rods 60 are fixedly connected to the mold movable template 11 or the mold fixed template 12. The fixed mold magnetic template 59 or the movable mold magnetic template 58 is provided with a limit plate 61 on the upper right side of the direction in which the mold enters the injection molding machine, and the limit plate 61 is fixedly connected to the fixed mold magnetic template 59 or the movable mold magnetic template 58. When the first mold pressure-keeping mechanism 9 or the second mold pressure-keeping mechanism 10 enters the injection molding machine 1, the limit rods 60 abut against the limit plate 61 to limit the first mold pressure-keeping mechanism 9 or the second mold pressure-keeping mechanism 10, so as to facilitate the rapid positioning of the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism to the accurate position where it enters the injection molding machine.

[0049] According to the present invention, a limit baffle 62 is symmetrically provided at the front and rear ends of the left end of the first mold slide 31, and a limit baffle 62 is symmetrically provided at the front and rear ends of the left end of the second mold slide 32. The limit baffle 62 is fixedly connected to the left end of the guide rail 34. A limit block 64 is respectively provided at the left end of the first mold slide 31 and the left end of the second mold slide 32. The limit block 64 is fixedly connected to the mobile platform 8 to facilitate the rapid positioning of the first mold pressure holding mechanism or the second mold pressure holding mechanism back to the position on the mobile platform through the limit baffle.

[0050] In the present invention, a limiting vertical plate 67 is provided on the side of the first oil-free bushing 48, and the side of the limiting vertical plate 67 is fixedly connected to the outer wall of the oil-free bushing, and the upper end of the limiting vertical plate 67 is fixedly connected to the limiting horizontal plate 68, and the limiting horizontal plate 68 is fixedly connected to the fixed plate 44, so as to improve the stability of the lifting mechanism through the limiting vertical plate and the limiting horizontal plate.

[0051] As attached Figure 1 and attached Figure 2The injection molding machine in the present invention is an injection molding machine in the prior art. The injection molding, pressure holding and pressure relief in the injection molding machine are similar to the operations in the prior art. A movable mold magnetic template and a fixed mold magnetic template are relatively arranged between the movable mold wall panel and the fixed mold wall panel in the injection molding machine. The movable mold magnetic template is fixedly connected to the movable mold wall panel, and the fixed mold magnetic template is fixedly connected to the fixed mold wall panel. The movable mold magnetic template and the fixed mold magnetic template are respectively connected to a control system, and the control system can be a PLC control system. The present invention arranges a double-station mold changing table on one side of the injection molding cavity of the injection molding machine, such as Figures 4 to 24The first mold slide and the second mold slide on the mobile platform are driven by a transposition motor to alternately dock with the guide slides on the movable mold magnetic template and the fixed mold magnetic template in the injection molding machine at the same height, so that the first mold pressure holding mechanism slides from the first mold slide or the second mold pressure holding mechanism slides from the second mold slide to the guide slides on the movable mold magnetic template and the fixed mold magnetic template in the injection molding machine. At the same time, the guide slides on the first mold slide or the second mold slide and the V-shaped grooves on the guide slides are larger than the width of the lower end of the guide slider, which can eliminate the error of repeated positioning of the mobile platform. At the same time, the upper limit baffle and the limit block of the mobile platform are used to limit the first mold pressure holding mechanism and the second mold pressure holding mechanism, thereby ensuring the precise positioning of the first mold pressure holding mechanism or the second mold pressure holding mechanism on the mobile platform. The mold pressure holding mechanism or the second mold pressure holding mechanism maintains the mold inside and opens it to take out the parts through the charging and demagnetizing state of the mold magnetic template. The mold is generally divided into two parts and is opposite to each other. The two parts of the mold are placed relatively between the mold movable template and the mold fixed template. The side of the mold movable template or the mold fixed template that is in contact with the mold cooperates with the mold surface. The mold movable template and the mold fixed template are opposite to each other. The mold magnetic template is tightly connected with the cushion block through magnetic force to lock the mold in the mold movable template and the mold fixed template, thereby generating a holding pressure on the mold. Before use, the upper limit baffle and the limit block of the mobile platform are removed, and the first mold pressure holding mechanism and the second mold pressure holding mechanism are transported by a mobile mold changing vehicle. The mobile mold changing vehicle carries the first mold pressure holding mechanism and the second mold pressure holding mechanism. The platform is docked with the mobile platform, the first mold pressure holding mechanism and the second mold pressure holding mechanism are pushed into the first mold slide and the second mold slide on the mobile platform, and then the limit baffle and the limit baffle are installed on the mobile platform. The double-station mold changing table in the present invention can also be equipped with universal wheels at the lower end of the mold changing table to facilitate the movement, installation and transportation of the mold pressure holding mechanism, and then the positioning mechanism on the first mold pressure holding mechanism or the second mold pressure holding mechanism is adjusted, and the adjustment screw is adjusted so that the lower end of the second adjustment plate leaks out of the lower end surface of the mold moving template or the mold fixed template, but does not touch the mobile platform, to ensure that when the first mold pressure holding mechanism or the second mold pressure holding mechanism enters the injection molding machine and is in place, the positioning block lifts the second adjustment plate, and the second adjustment plate lifts the first adjustment plate upward and then lifts The fixed seat, because the lower part of the opposite surface of the mold fixed platen and the mold movable platen are provided with positioning mechanisms, the four positioning mechanisms are sufficient to lift and support the first mold pressure-holding mechanism or the second mold pressure-holding mechanism. During operation, the push-pull lifting mechanism on the double-station mold changing table drives the lower end of the push-pull hook to move downward and then rise to hook the push-pull handle on the first mold pressure-holding mechanism or the second mold pressure-holding mechanism to enter the injection molding machine, and then drives the push-pull mechanism to drive the first mold pressure-holding mechanism or the second mold pressure-holding mechanism to enter the injection molding machine. The lifting mechanism rises and separates from the push-pull handle after the push-pull hook is moved downward, and the push-pull hook is retracted by the push-pull mechanism. The first mold pressure-holding mechanism and the second mold pressure-holding mechanism are quickly positioned by the limit rod and the upper limit plate of the movable mold magnetic platen and the fixed mold magnetic platen.At the same time, the positioning mechanism cooperates with the positioning block to lift the first mold pressure-holding mechanism or the second mold pressure-holding mechanism, so that the first mold pressure-holding mechanism and the second mold pressure-holding mechanism are separated from the guide rails on the movable mold magnetic template and the fixed mold magnetic template, which is convenient for the movable mold magnetic template and the fixed mold magnetic template to mold the first mold pressure-holding mechanism or the second mold pressure-holding mechanism for injection molding. After the injection molding is completed, the movable mold magnetic template and the fixed mold magnetic template are separated, and the push-pull mechanism extends the push-pull hook into the injection molding machine and hooks the push-pull handle through the lifting mechanism, and then drives the first mold pressure-holding mechanism or the second mold pressure-holding mechanism back to the moving platform, and then the moving platform moves, and the workstation is changed, so that the first mold pressure-holding mechanism and the second mold pressure-holding mechanism alternately enter the injection molding machine. The specific operation is as follows: the initial state is as attached, Figure 1 , the first mold pressure-holding mechanism is located in the injection molding machine and is in a mold-locking state, a second mold pressure-holding mechanism is provided on the second mold slideway of the double-station mold-changing table moving platform, the second mold pressure-holding mechanism has been injection-molded and is tightly connected to the pad through the magnetic force of the mold magnetic template so that the mold in the second mold pressure-holding mechanism is in a pressure-holding state, and the guide rail on the first mold slideway is aligned with the guide rail in the injection molding machine to meet the mold change requirements;

[0052] Step 1: The injection molding machine closes the mold to hold the first mold pressure holding mechanism and inject;

[0053] Step 2: The first mold holding mechanism magnetizes the mold magnetic template to lock the mold, and at the same time, the movable mold magnetic template and the fixed mold magnetic template in the injection molding machine are demagnetized;

[0054] Step 3: The injection molding machine opens the mold, and the mold opening size is slightly larger than the width of the second mold pressure holding mechanism;

[0055] Step 4: The cylinder pushes the push-pull hook bracket to the lower limit position, and the push-pull hook moves to the push-pull handle of the first mold pressure holding mechanism in the injection molding machine and stops. The cylinder changes direction, and the push-pull hook bracket rises due to the force of the spring and the cylinder and cooperates with the push-pull handle to pull the first mold pressure holding mechanism;

[0056] Step 5: The push-pull hook moves backward, and the first mold pressure-holding mechanism is pulled back onto the first mold slideway. During the pulling back process, the mechanism is limited by the limit baffle plate and the limit block of the mobile platform and guided to the specified position;

[0057] Step 6: The cylinder changes direction to push the push-pull hook down, and the push-pull hook and the push-pull hook handle are separated. Figure 3 ;

[0058] Step 7: The double-station mold changing table moves the mobile platform through the position changing motor to align the guide rail on the second mold slide with the guide rail in the injection molding machine;

[0059] Step 8: The cylinder is reversed, and the push-pull hook bracket is lifted by the force of the spring and the cylinder and cooperates with the push-pull handle of the second mold pressure holding mechanism to pull the second mold pressure holding mechanism;

[0060] Step 9: Push the pull hook forward and push the second mold pressure holding mechanism into the injection molding machine. Through the cooperation of the positioning mechanism and the positioning block and the cooperation of the limit rod and the limit plate, as shown in the attached Fig.24 Push the second mold pressure-holding mechanism to a specified position;

[0061] Step 10: The push-pull hook descends and exits the injection molding machine;

[0062] Step 11: The injection molding machine closes the mold, and the movable mold magnetic template and the fixed mold magnetic template in the mold start to adsorb the second mold pressure holding mechanism. At the same time, the mold magnetic template on the second mold pressure holding mechanism is demagnetized;

[0063] Step 12: The injection molding machine opens the second mold pressure holding mechanism and takes out the workpiece;

[0064] Step 13: The injection molding machine closes the mold to hold the pressure of the second mold holding mechanism and inject;

[0065] Step 14: The second mold holding mechanism locks the mold by magnetizing the mold magnetic template. At the same time, the movable mold magnetic template and the fixed mold magnetic template in the injection molding machine are demagnetized.

[0066] Step 15: The injection molding machine opens the mold, and the mold opening size is slightly larger than the width of the second mold pressure holding mechanism;

[0067] Step 16: The cylinder pushes the push-pull hook bracket to the lower limit position, the push-pull hook moves to the push-pull handle of the second mold pressure-holding mechanism and stops, the cylinder changes direction, the push-pull hook bracket rises due to the force of the spring and the cylinder and cooperates with the push-pull handle to pull the second mold pressure-holding mechanism;

[0068] Step 17: The push-pull hook retreats, and the second mold pressure-holding mechanism is pulled back to the second mold slideway. During the pulling back process, it is limited by the limit baffle plate and the limit block of the mobile platform and guided to the specified position;

[0069] Step 18: The cylinder is reversed to push the push-pull hook downward, and the push-pull hook is separated from the push-pull handle of the second mold pressure holding mechanism;

[0070] Step 19: The double-station mold changing table moves the mobile platform through the position changing motor to align the guide rail on the first mold slideway with the guide rail in the injection molding machine;

[0071] Step 20: The cylinder is reversed, and the push-pull hook bracket is lifted by the force of the spring and the cylinder and cooperates with the push-pull handle of the first mold pressure holding mechanism to pull the first mold pressure holding mechanism;

[0072] Step 21: The push-pull hook moves forward to push the first mold pressure-holding mechanism into the injection molding machine, and the first mold pressure-holding mechanism is pushed to a designated position through the cooperation between the positioning mechanism and the positioning block and between the limiting rod and the limiting plate;

[0073] Step 22: The push-pull hook descends and exits the injection molding machine;

[0074] Step 23: The injection molding machine closes the mold, and the movable mold magnetic template and the fixed mold magnetic template in the mold start to adsorb the first mold pressure holding mechanism. At the same time, the mold magnetic template on the first mold pressure holding mechanism is demagnetized;

[0075] Step 24: The injection molding machine opens the first mold pressure holding mechanism and takes out the workpiece;

[0076] Repeat step 1 to step 24; it can be seen from the above that the present invention sets a double-station mold changing table, and cooperates with the guide slide rail mechanism in the injection molding machine through the position change mechanism and the push-pull lifting mechanism, so that the first mold pressure holding mechanism and the second mold pressure holding mechanism alternately enter the injection molding machine for injection molding, and then maintain pressure through the mold pressure holding mechanism on the mold changing table, ensuring that there is always a mold in the injection molding machine for injection molding or pressure maintenance to take out parts, which greatly improves the use efficiency of the injection molding machine, improves the production efficiency of the workpiece, and reduces the production cost of the workpiece.

[0077] The present invention has the advantages of alternating injection molding, pressure maintenance outside the machine, high production efficiency, convenient operation, power saving and labor saving, etc. due to the adoption of the above structure.

Claims

1. A double-station mold alternating injection and external pressure holding system, comprising an injection molding machine and a control system, characterized in that: The injection molding machine is provided with a double-station mold-changing platform, a first mold pressure-holding mechanism and a second mold pressure-holding mechanism on the mold feed side; the movable mold magnetic template and the fixed mold magnetic template in the injection molding cavity of the injection molding machine are respectively provided with guide rail mechanisms, and the guide rail mechanisms are connected to the movable mold magnetic template or the fixed mold magnetic template; the double-station mold-changing platform includes a support frame, and the support frame is provided with a push-pull lifting mechanism and a transposition mechanism from top to bottom at intervals, and the push-pull lifting mechanism and the transposition mechanism are respectively connected to the support frame; a moving platform is provided on the transposition mechanism, and the moving platform is driven by the transposition mechanism; the first mold pressure-holding mechanism and the second mold pressure-holding mechanism are arranged in parallel on the moving platform, and the first mold pressure-holding mechanism and the second mold pressure-holding mechanism are respectively slidably connected to the moving platform, and the The first mold pressure-holding mechanism or the second mold pressure-holding mechanism is alternately connected to the push-pull lifting mechanism above it after being driven and shifted by the shifting mechanism. The first mold pressure-holding mechanism or the second mold pressure-holding mechanism is driven by the push-pull lifting mechanism to enter the injection cavity and is slidably connected to the guide slide rail mechanism and is extruded and injected through the movable mold magnetic template and the fixed mold magnetic template. The first mold pressure-holding mechanism and the second mold pressure-holding mechanism respectively include a mold movable template, a mold fixed template, a cushion block and a mold magnetic template. The mold movable template and the mold fixed template are arranged in parallel with each other at a relative interval. Mold magnetic templates are respectively provided on both sides of the mold movable template. The mold magnetic template is fixedly connected to the mold movable template. The mold magnetic template is connected to a control system. Cushions are respectively provided on both sides of the mold fixed template. The cushion block is fixedly connected to the mold fixed template, the mold magnetic template is opposite to the cushion block and the mold magnetic template is tightly connected to the cushion block through magnetic force, so that a mold pressure holding space is formed between the mold movable template and the mold fixed template, the guide slide rail mechanism includes a guide slide rail, and positioning mechanisms are respectively provided on both sides of the lower part of the relative surfaces of the mold movable template and the mold fixed template, the positioning mechanism includes a fixed seat, a connecting plate, a first adjusting plate, a second adjusting plate and an adjusting screw, a first adjusting plate and a second adjusting plate are provided between the fixed seat and the connecting plate, an opening groove opening downward is provided on the fixed seat, and fixed threaded holes are provided on the fixed seats on both sides of the opening groove, and the first adjusting plate and the second adjusting plate are sequentially provided in the opening groove from top to bottom, and the lower end of the first adjusting plate The surface is an inclined surface and contacts with the upper end surface of the second adjusting plate, the first adjusting plate is provided with an adjusting plate threaded hole that penetrates horizontally, the adjusting screw passes through the fixed threaded hole and the adjusting plate threaded hole and is threadedly connected to the first adjusting plate, the second adjusting plate is provided with two vertical threaded grooves at intervals, the second adjusting plate is fixedly connected to the fixing seat through the screw passing through the vertical threaded groove, the lower end surface of the second adjusting plate is an inclined surface, the connecting plate covers the fixing seat, the first adjusting plate and the second adjusting plate, the upper end and the periphery of the connecting plate are fixedly connected to the mold movable template or the mold fixed template through the screw passing through the connecting plate and the fixing seat, the adjusting screw is rotated to drive the first adjusting plate to move left and right, adjust the inclination of the lower end surface of the second adjusting plate and the height of the lower end of the second adjusting plate exposed from the fixing seat,Positioning blocks are respectively arranged on both sides of the lower end of the movable mold magnetic template and the lower end of the fixed mold magnetic template. The upper end surface of the positioning block is inclined and matched with the lower end surface of the second adjustment plate. The positioning block is spaced apart from the guide rail, and the height of the upper end surface of the positioning block is higher than the height of the upper end surface of the guide rail.

2. A double-station mold alternating injection external pressure holding system according to claim 1, characterized in that: The transposition mechanism includes a transposition linear guide, a transposition slider, a transposition ball screw, a nut, a nut mounting seat, a connecting plate, a ball screw mounting plate, a transposition motor, a first mold slideway and a second mold slideway. A transposition bracket is provided in the middle of the support frame, and the transposition bracket is fixedly connected to the support frame. Transposition linear guides are provided at the left and right ends of the transposition bracket, and a transposition ball screw is provided in the middle of the transposition bracket. The transposition ball screw and the transposition linear guide are parallel to each other. A nut is sleeved on the transposition ball screw, and the nut is fixedly connected to the nut mounting seat. A connecting plate is provided below the transposition ball screw, and ball screw mounting plates are arranged at intervals on the connecting plate. Both ends of the connecting plate are fixedly connected to the transposition bracket, and the front and rear ends of the transposition ball screw are respectively connected to the ball screw mounting seat via bearings. The mounting plate is connected, one end of the transposition ball screw passes through the ball screw mounting plate and is fixedly connected to the output shaft of the transposition motor through a coupling, the transposition motor is fixed on the transposition bracket, the transposition motor is connected to the control system, the lower end of the movable platform is hinged to the nut mounting seat, the two sides of the lower end of the movable platform are respectively slidably connected to the transposition linear guide rail through a transposition slider, a first mold slideway and a second mold slideway are arranged in parallel on the movable platform, the first mold slideway is two guide slideways arranged in parallel at an interval, the second mold slideway is two guide slideways arranged in parallel at an interval, the lower end of the guide slideway is fixedly connected to the movable platform, the first mold pressure holding mechanism is slidably connected to the first mold slideway, and the second mold pressure holding mechanism is slidably connected to the second mold slideway.

3. A double-station mold alternating injection external pressure holding system according to claim 2, characterized in that: The push-pull lifting mechanism includes a push-pull mechanism and a lifting mechanism, the push-pull mechanism includes a push-pull hook bracket, a push-pull linear guide, a push-pull slider, a push-pull ball screw, a push-pull ball screw mounting plate, a nut, a nut mounting seat, a synchronous wheel, a synchronous belt, a push-pull motor, a push-pull hook fixing seat and a push-pull hook, the front and rear sides of the lower end of the push-pull hook bracket are respectively provided with push-pull linear guides, a push-pull ball screw is provided in the middle of the push-pull hook bracket, and ball screw mounting plates are respectively provided at the left and right ends of the push-pull hook bracket, the push-pull linear guide is perpendicular to the transposition linear guide, the upper end of the push-pull linear guide is fixedly connected to the push-pull hook bracket, the two ends of the push-pull ball screw are respectively connected to the ball screw mounting plate via bearings, and a nut is sleeved on the push-pull ball screw, the The nut is fixedly connected to the nut mounting seat, one end of the push-pull ball screw passes through the ball screw mounting plate and is provided with a synchronous wheel, the synchronous wheel is fixedly connected to the push-pull ball screw, the synchronous wheel is connected to the synchronous wheel on the output shaft of the push-pull motor via a synchronous belt, the push-pull motor is fixed on the push-pull hook bracket, the push-pull motor is connected to the control system, the push-pull hook fixing seat is located below the push-pull hook bracket, the front and rear ends of the push-pull hook fixing seat are respectively slidably connected to the push-pull linear guide rail via a push-pull slider, the middle of the push-pull hook fixing seat is fixedly connected to the nut mounting seat at the lower end of the push-pull ball screw, a push-pull hook is fixed to the lower end of the push-pull hook fixing seat, the first mold pressure holding mechanism or the second mold pressure holding mechanism is provided with a push-pull handle at the end away from the injection molding machine, and one end of the push-pull handle is connected to a pad The block is fixedly connected, and the other end is connected with the push-pull hook. The upper end of the push-pull hook bracket is provided with a lifting mechanism, and the lifting mechanism includes a fixed plate, a lifting plate, a cylinder, a limit screw, a guide rod, a floating joint, a first oil-free bushing, a second oil-free bushing, a screw, a spring support, a spring, a gasket and a nut. The fixed plate is located at the upper end of the support frame, and both ends of the fixed plate are fixedly connected to the support frame respectively. A lifting plate parallel to the fixed plate is provided below the fixed plate, and the lower end of the lifting plate is fixedly connected to the upper end of the push-pull hook bracket, a cylinder is provided in the middle of the lifting plate, and guide rods are provided on the four corners of the lifting plate respectively. Guide holes and limit holes are provided on the fixed plate, one end of the cylinder is fixedly connected to the fixed plate, and the other end is fixedly connected to the lifting plate via a floating joint. The cylinder and the control The control system is connected, and limit screws are respectively provided on both sides of the cylinder, and the lower ends of the limit screws pass through the limit holes and are fixedly connected to the lifting plate, the lower end of the guide rod is fixedly connected to the lifting plate, and the upper end passes through the first oil-free bushing and the second oil-free bushing in sequence and is placed on the upper end of the fixed plate, the first oil-free bushing is located between the lifting plate and the fixed plate, the first oil-free bushing is slidably connected to the guide rod, the second oil-free bushing is located in the guide hole, the outer wall of the second oil-free bushing is fixedly connected to the fixed plate, and the inner wall is slidably connected to the guide rod, a threaded hole is provided in the middle of the upper end of the guide rod, the lower end of the screw is threadedly connected to the guide rod through a thread, the screw passes through the spring support, the spring, the gasket and the nut in sequence from bottom to top and is threadedly connected to the nut, the lower end of the spring support contacts with the upper end surface of the fixed plate,The upper end is in contact with the spring.

4. A double-station mold alternating injection external pressure holding system according to claim 2, characterized in that: The guide slide rail mechanism also includes a guide rail support seat, and the lower ends of the movable mold magnetic template and the fixed mold magnetic template are respectively provided with guide rail support seats, and the guide rail support seats are provided with guide slide rails, and the guide slide rails are arranged at the same height as the guide slide rails. The guide rail support seat is fixedly connected to the movable mold magnetic template or the fixed mold magnetic template, and the lower end of the guide slide rail is fixedly connected to the guide rail support seat.

5. A double-station mold alternating injection external pressure holding system according to claim 4, characterized in that: The lower end of the mold movable template and the lower end of the mold fixed template are respectively provided with guide sliders, the guide sliders are fixedly connected to the mold movable template or the mold fixed template, grooves are respectively provided on the guide slide rails and the guide slide rails, the guide sliders are slidably connected with the guide slide rails or the guide slide rails, the lower end of the positioning block is provided with a positioning block fixing plate, the upper end of the positioning block fixing plate is fixedly connected to the positioning block, and the side surface of the positioning block fixing plate is fixedly connected to the guide rail support seat.

6. A double-station mold alternating injection external pressure holding system according to claim 5, characterized in that: The groove on the guide rail and the groove on the guide rail are both V-shaped in cross section, the lower end of the guide slider is V-shaped in cross section, and the width of the lower end of the guide slider is smaller than the width of the guide rail or the V-shaped groove on the guide rail.

7. A double-station mold alternating injection external pressure holding system according to claim 4, 5 or 6, characterized in that: The first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism is respectively provided with limit rods on both sides of one end facing the injection molding machine, the limit rods are fixedly connected to the mold movable platen or the mold fixed platen, and the fixed mold magnetic platen or the movable mold magnetic platen is provided with a limit plate on the upper right side along the direction in which the mold enters the injection molding machine, the limit plate is fixedly connected to the fixed mold magnetic platen or the movable mold magnetic platen, the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism enters the injection molding machine, the limit rods are against the limit plate, and the first mold pressure-keeping mechanism or the second mold pressure-keeping mechanism is limited.

8. A double-station mold alternating injection external pressure holding system according to claim 7, characterized in that: A limit baffle is symmetrically provided at the front and rear left end of the first mold slide, and a limit baffle is symmetrically provided at the front and rear left end of the second mold slide. The limit baffle is fixedly connected to the left end of the guide slide rail, and a limit block is respectively provided at the left end of the first mold slide and the left end of the second mold slide, and the limit block is fixedly connected to the moving platform.

9. A double-station mold alternating injection external pressure holding system according to claim 3, characterized in that: A limiting vertical plate is provided on the side of the first oil-free bushing, the side of the limiting vertical plate is fixedly connected to the outer wall of the oil-free bushing, the upper end of the limiting vertical plate is fixedly connected to the limiting horizontal plate, and the limiting horizontal plate is fixedly connected to the fixing plate.

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