CN211993909U

CN211993909U - Die changing device and die changing trolley

Info

Publication number: CN211993909U
Application number: CN202020386932.5U
Authority: CN
Inventors: 李川; 戴丛林; 黄朋朋; 王廷永; 孙鹏; 李惠
Original assignee: Weihai Lici Electric Co ltd
Current assignee: Weihai Lici Electric Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-11-24
Anticipated expiration: 2030-03-24

Abstract

The utility model relates to the field of rapid die change equipment, in particular to a die change device and a die change trolley, the die change device comprises a die change table, a transposition mechanism is arranged on the die change table, the transposition mechanism comprises a transposition linear guide rail, a transposition slider, a transposition ball screw, a nut mounting seat, a connecting plate, a ball screw mounting plate and a transposition motor, a moving platform is driven by the transposition mechanism, at least two die bearing stations are arranged on the moving platform, a push-pull lifting mechanism is arranged above the moving platform, the push-pull lifting mechanism comprises a push-pull mechanism and a lifting mechanism, 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 mounting plate, a nut mounting seat, a synchronous wheel, a synchronous belt, a push-pull motor, a push-pull hook fixing, the utility model discloses can bear two moulds simultaneously, retooling is fast, convenient operation, work piece production efficiency height.

Description

Die changing device and die changing trolley

Technical Field

The utility model relates to a quick retooling equipment field indicates a retooling device and retooling platform truck particularly.

Background

At present, an injection molding machine starts to develop rapidly in a plastic machine, a large number of plastic products in modern production are widely applied to the fields of automobiles, household appliances, electronics, daily necessities, industrial materials and the like, the application of the injection molding machine becomes indispensable, initially, the injection molding machine can only be replaced by a crane machine and manpower when a mold is replaced, along with the development of scientific technology, a mold replacing device and a mold replacing trolley appear, Chinese patent CN202439154U, the name is an automatic replacement system of the injection molding machine mold, the automatic replacement system comprises a movable mold replacing table, the mold replacing table is matched with a mold replacing frame of the injection molding machine, the replaced mold is installed on the mold replacing frame through the mold replacing table, the mold replacing table is provided with an electric control system, the mold replacing table comprises a movable table body and a fixed table seat, at least one group of mold replacing rollers for moving the mold is arranged on the movable table body, and a mold positioning; the mold changing table comprises a moving vehicle body, at least one group of mold changing rollers for moving a mold are further arranged on the moving vehicle body, and mold positioning cylinders are arranged among the mold changing rollers; the moving vehicle body is arranged on a guide rail on the ground, a speed reducing motor I is arranged on the moving vehicle body and drives wheels of the moving vehicle body to move on the guide rail, the mold changing roller is connected with the speed reducing motor I through a belt or a chain, a transition mold changing table is arranged between the mold changing table and a mold changing frame of the injection molding machine and comprises a transition table body, a transition die-changing roller for moving the die is arranged on the transition table body, a speed reducing motor II is arranged on the transition table body, the speed reducing motor II is connected with the transition die-changing roller through a belt or a chain, the mould changing frame is characterized in that the mould changing frame is respectively provided with a fixed mould plate and a movable mould plate of the injection molding machine, the mould changing frame is provided with a roller, a speed reducing motor III drives the roller to rotate through a chain or a belt, the mould is connected with the mould changing frame through a mould clamping device, the electric control system is a PLC power supply, and the above patents have the following defects: firstly, the mold changing table of the patent can only convey one mold, the mold changing table is idle when the pressure of the injection molding machine is maintained, and the mold changing table needs to run back and forth if the mold changing table is used for changing the mold of other injection molding machines, so that the production cost of workpieces is greatly improved; secondly, if the injection molding machine needs to produce two kinds of workpieces at intervals, because the workpieces are different, the molds need to be continuously replaced from the mold replacing table and the injection molding machine, the operation is inconvenient, time and labor are wasted, and the production cost of the workpieces is increased.

Disclosure of Invention

An object of the utility model is to solve the not enough of prior art, provide one kind and can bear two moulds simultaneously, retooling is fast, convenient operation, the high retooling device of work piece production efficiency and retooling platform truck.

The utility model provides a retooling device, includes retooling platform, its characterized in that: the mould changing platform is provided with a transposition mechanism, the transposition mechanism is connected with the mould changing platform, the transposition mechanism is provided with a moving platform, the moving platform is connected with the transposition mechanism and driven by the transposition mechanism, and the moving platform is at least provided with two mould bearing stations, so that the moving platform is driven by the transposition mechanism to move to realize station exchange, and further the mould is changed.

The transposition mechanism of the utility model comprises a transposition linear guide rail, a transposition slide block, a transposition ball screw, a nut mounting seat, a connecting plate, a ball screw mounting plate and a transposition motor, wherein the mould changing table comprises a support frame, a transposition bracket is arranged in the middle of the support frame, the transposition bracket is fixedly connected with the support frame, the left end and the right end of the transposition bracket are respectively provided with the transposition linear guide rail, the transposition ball screw is arranged in the middle of the transposition bracket, the transposition ball screw is parallel to the transposition linear guide rail, the nut is sleeved on the transposition ball screw and is fixedly connected with the nut mounting seat, the connecting plate is arranged below the transposition ball screw, the ball screw mounting plate is arranged on the connecting plate at intervals, the two ends of the connecting plate are fixedly connected with the transposition bracket, and the front end and the back end of the transposition ball screw, one end of the transposition ball screw penetrates out of the ball screw mounting plate and is fixedly connected with an output shaft of the transposition motor through a coupler, the transposition motor is fixed on the transposition support and is connected with a power supply, the lower end of the moving platform is hinged to the nut mounting seat, two sides of the lower end of the moving platform are respectively in sliding connection with the transposition linear guide rail through the transposition slider, so that the transposition ball screw is driven to rotate through the transposition motor, and the nut mounting seat drives the moving platform to move back and forth on the transposition support to perform transposition.

The utility model is characterized in that a push-pull lifting mechanism is arranged above the mobile platform, the push-pull lifting mechanism comprises a push-pull mechanism and a lifting mechanism, the push-pull mechanism comprises a push-pull hook support, a push-pull linear guide rail, a push-pull slider, a push-pull ball screw mounting plate, a nut mounting seat, a synchronizing wheel, a synchronous belt, a push-pull motor, a push-pull hook fixing seat and a push-pull hook, the front side and the rear side of the lower end of the push-pull hook support are respectively provided with the push-pull linear guide rail, the middle of the push-pull hook support is provided with the push-pull ball screw, the left end and the right end of the push-pull hook support are respectively provided with the ball screw mounting plate, the push-pull linear guide rail is vertical, the nut is fixedly connected with the nut mounting seat, one end of the push-pull ball screw penetrates out of the ball screw mounting plate to be provided with a synchronizing wheel, the synchronizing wheel is fixedly connected with the push-pull ball screw, the synchronizing wheel is connected with the synchronizing wheel on an output shaft of a push-pull motor through a synchronizing belt, the push-pull motor is fixed on a push-pull hook support, the push-pull motor is connected with a power supply, the push-pull hook fixing seat is located below the push-pull hook support, the front end and the rear end of the push-pull hook fixing seat are respectively connected with a push-pull linear guide rail through a push-pull slider in a sliding mode, the middle of the push-pull hook fixing seat is fixedly connected with the nut mounting seat at the lower end of the push-pull ball screw, a push-pull hook is fixed at the lower end of the push-, The lifting hook comprises a first oilless bushing, a screw, a spring support, a spring, a gasket and a nut, wherein a fixed plate is positioned at the upper end of a support frame, two ends of the fixed plate are respectively and fixedly connected with the support frame, a lifting plate parallel to the fixed plate is arranged below the fixed plate, the lower end of the lifting plate is fixedly connected with the upper end of a push-pull hook support, a cylinder is arranged in the middle of the lifting plate, guide rods are respectively arranged on four corners of the lifting plate, a guide hole and a limiting hole are arranged on the fixed plate, one end of the cylinder is fixedly connected with the fixed plate, the other end of the cylinder is fixedly connected with the lifting plate through a floating joint, the cylinder is connected with a power supply, limiting screws are respectively arranged at two sides of the cylinder, the lower end of each limiting screw penetrates through the limiting hole to be fixedly, first oilless bush is located between lifter plate and the fixed plate, first oilless bush and guide bar sliding connection, second oilless bush is located the guiding hole, second oilless bush outer wall and fixed plate fixed connection, inner wall and guide bar sliding connection, be equipped with the screw hole in the middle of the guide bar upper end, screw rod lower extreme through screw thread and guide bar threaded connection, the screw rod from upwards passing spring support, spring, gasket and nut in proper order and with nut threaded connection down, the spring support lower extreme touches with the fixed plate up end, and the upper end contacts with the spring to do benefit to and drive the lifter plate and then drive the push-and-pull hook support through the cylinder and reciprocate, the guide bar provides the direction for the lifter plate goes up and down, through the biggest stroke of spring and spacing screw spacing cylinder, through the push-and-pull hook lift and catch the mould.

Last first mould slide and the second mould slide of being equipped with side by side of moving platform, first mould slide is two interval parallel arrangement's direction slide rail, the second mould slide is two interval parallel arrangement's direction slide rail, direction slide rail lower extreme and moving platform fixed connection to do benefit to and support the mould through first mould slide and second mould slide, reduce the frictional force that the mould removed simultaneously, change the position through transposition motor drive moving platform, make first mould slide and second mould slide dock with the injection molding machine in turn.

Symmetry is equipped with limit baffle around the first mould slide left end, symmetry is equipped with limit baffle around the second mould slide left end, limit baffle and direction slide rail left end fixed connection, first mould slide left end and second mould slide left end are equipped with limit stop respectively, limit stop and moving platform fixed connection to do benefit to through limit baffle and the position of limit stop quick positioning die on first mould slide or second mould slide, prevent that the mould from slipping from moving platform simultaneously.

First no oil liner side is equipped with spacing riser, spacing riser side and no oil liner outer wall fixed connection, spacing riser upper end and spacing diaphragm fixed connection, spacing diaphragm and fixed plate fixed connection to do benefit to the stability that improves elevating system through spacing riser and spacing diaphragm.

The utility model provides a retooling platform truck which characterized in that: including above-mentioned retooling device, retooling platform lower extreme is equipped with the universal wheel to do benefit to convenient removal and fixed.

The utility model discloses owing to adopt above-mentioned structure, have can bear two moulds simultaneously, die change advantage such as fast, convenient operation, work piece production efficiency height.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Figure 2 is a rear view of figure 1 of the present invention.

Fig. 3 is a schematic structural diagram of the shift mechanism and the mobile platform of the present invention.

Fig. 4 is a schematic structural diagram of a part of the lower end transposition mechanism of fig. 3 after the moving platform is lifted.

Fig. 5 is a schematic structural view of the middle push-pull lifting mechanism of the present invention.

Fig. 6 is a bottom view of the middle push-pull elevating mechanism of the present invention.

Fig. 7 is a side view of the middle push-pull lift mechanism of the present invention.

Fig. 8 is an enlarged view of the point B in fig. 7 according to the present invention.

Fig. 9 is a partial sectional view of the middle push-pull mechanism of the present invention.

Fig. 10 is a schematic view of the present invention in use docked with an injection molding machine.

Detailed Description

The present invention will be described with reference to the accompanying drawings and examples.

The utility model provides a retooling device, includes retooling platform 2, its characterized in that: the mould changing table is characterized in that a transposition mechanism 6 is arranged on the mould changing table 2, the transposition mechanism 6 is connected with the mould changing table 2, a moving platform 8 is arranged on the transposition mechanism 6, the moving platform 8 is connected with the transposition mechanism 6 and driven by the transposition mechanism 6, and at least two mould bearing stations are arranged on the moving platform 8, so that the moving platform is driven by the transposition mechanism to move to realize station exchange, and further, the mould is replaced.

The transposition mechanism 6 of the utility model comprises a transposition linear guide 27, a transposition slide block, a transposition ball screw 28, a nut mounting seat, a connecting plate, a ball screw mounting plate and a transposition motor 30, the mould changing table 2 comprises a support frame 5, a transposition bracket 33 is arranged in the middle of the support frame 5, the transposition bracket 33 is fixedly connected with the support frame 5, the left end and the right end of the transposition bracket 33 are respectively provided with the transposition linear guide 27, the transposition ball screw 28 is arranged in the middle of the transposition bracket 33, the transposition ball screw 28 is parallel to the transposition linear guide 27, the transposition ball screw 28 is sleeved with the nut, the nut is fixedly connected with the nut mounting seat, the connecting plate is arranged below the transposition ball screw 28, the ball screw mounting plates are arranged on the connecting plate at intervals, the two ends of the connecting plate are fixedly connected with the transposition bracket 33, the front end and the back end of the ball screw 28 are respectively connected, one end of the transposition ball screw 28 penetrates out of the ball screw mounting plate and is fixedly connected with an output shaft of the transposition motor 30 through a coupler, the transposition motor 30 is fixed on the transposition support 33, the transposition motor 30 is connected with a power supply, the lower end of the moving platform 8 is hinged to the nut mounting seat, two sides of the lower end of the moving platform 8 are respectively in sliding connection with the transposition linear guide rail 27 through the transposition slide block, so that the transposition ball screw is driven to rotate through the transposition motor, and the nut mounting seat drives the moving platform to move back and forth on the transposition support to perform transposition.

The utility model discloses a moving platform 8 top is equipped with push-and-pull elevating system 7, push-and-pull elevating system 7 includes push-and-pull mechanism 35 and elevating system 36, push-and-pull mechanism 35 includes push-and-pull hook support 37, push-and-pull linear guide 38, push-and-pull slider, push-and-pull ball screw 39, push-and-pull ball screw mounting panel, nut mount pad, synchronizing wheel 40, hold-in range 41, push-and-pull motor 69, push-and-pull hook fixing base 42 and push-and-pull hook 43, push-and-pull linear guide 38 is equipped with respectively to both sides around the lower extreme of push-and-pull hook support 37, be equipped with push-and-pull ball screw 39 in the middle of push-and-pull hook support 37, push-and-pull hook support 37 left and right ends are equipped with ball screw mounting panel respectively, push-and-, the push-pull ball screw 39 is sleeved with a nut, the nut is fixedly connected with a nut mounting seat, one end of the push-pull ball screw 39 penetrates through the ball screw mounting plate and is provided with a synchronizing wheel 40, the synchronizing wheel 40 is fixedly connected with the push-pull ball screw 39, the synchronizing wheel 40 is connected with a synchronizing wheel on an output shaft of a push-pull motor 69 through a synchronizing belt 41, the push-pull motor 69 is fixed on a push-pull hook support 37, the push-pull motor 69 is connected with a power supply, a push-pull hook fixing seat 42 is positioned below the push-pull hook support 37, the front end and the rear end of the push-pull hook fixing seat 42 are respectively connected with a push-pull linear guide rail 38 through a push-pull slider in a sliding mode, the middle of the push-pull hook fixing seat 42 is fixedly connected with the nut mounting seat at the lower end of the push-pull ball screw 39, the lifting plate 45, an air cylinder 46, a limit screw 66, a guide rod 47, a floating joint, a first oilless bush 48, a second oilless bush 49, a screw 50, a spring support 51, a spring 52, a gasket 53 and a nut 54, wherein the fixed plate 44 is positioned at the upper end of the support frame 5, two ends of the fixed plate 44 are respectively fixedly connected with the support frame 5, the lifting plate 45 parallel to the fixed plate 44 is arranged below the fixed plate 44, the lower end of the lifting plate 45 is fixedly connected with the upper end of the push-pull hook support 37, the air cylinder 46 is arranged in the middle of the lifting plate 45, the guide rods 47 are respectively arranged on four corners of the lifting plate 45, a guide hole and a limit hole are arranged on the fixed plate 44, one end of the air cylinder 46 is fixedly connected with the fixed plate 44, the other end of the air cylinder is fixedly connected with the lifting plate 45 through the floating joint, the air cylinder 46 is connected with a power, the lower end of the guide rod 47 is fixedly connected with the lifting plate 45, the upper end of the guide rod sequentially penetrates through a first oilless bushing 48 and a second oilless bushing 49 to be arranged at the upper end of the fixing plate 44, the first oilless bushing 48 is positioned between the lifting plate 45 and the fixing plate 44, the first oilless bushing 48 is in sliding connection with the guide rod 47, the second oilless bushing 49 is positioned in the guide hole, the outer wall of the second oilless bushing 49 is fixedly connected with the fixing plate 44, the inner wall of the second oilless bushing is in sliding connection with the guide rod 47, a threaded hole is formed in the middle of the upper end of the guide rod 47, the lower end of the screw rod 50 is in threaded connection with the guide rod 47 through threads, the screw rod 50 sequentially penetrates through a spring support 51, a spring 52, a gasket 53 and a nut 54 from bottom to top and is in threaded connection with the nut 54, the lower end of the spring support 51, the guide rod provides the direction for the lifting plate to lift, and the maximum stroke of the cylinder is limited through the spring and the limiting screw, and the mold is hooked through the pushing and pulling of the hook.

Moving platform 8 is last to be equipped with first mould slide 31 and second mould slide 32 side by side, first mould slide 31 is two interval parallel arrangement's direction slide rail 34, second mould slide 32 is two interval parallel arrangement's direction slide rail 34, direction slide rail 34 lower extreme and 8 fixed connection of moving platform to do benefit to and support the mould through first mould slide and second mould slide, reduce the frictional force that the mould removed simultaneously, change the position through transposition motor drive moving platform, make first mould slide and second mould slide dock with the injection molding machine in turn.

Symmetry is equipped with limit baffle 62 around the first mould slide 31 left end, symmetry is equipped with limit baffle 62 around the second mould slide 32 left end,

limit baffle

62 and 34 left end fixed connection of direction slide rail, 31 left end of first mould slide and 32 left ends of second mould slide are equipped with limit stop 64 respectively, limit

stop

64 and 8 fixed connection of moving platform to do benefit to through limit baffle and the position of limit stop quick positioning mould on first mould slide or second mould slide, prevent that the mould from slipping from moving platform simultaneously.

First no oil liner 48 side is equipped with spacing riser 67, spacing riser 67 side and no oil liner outer wall fixed connection, spacing riser 67 upper end and spacing diaphragm 68 fixed connection, spacing diaphragm 68 and fixed plate 44 fixed connection to do benefit to the stability that improves elevating system through spacing riser and spacing diaphragm.

The utility model provides a retooling platform truck which characterized in that: including above-mentioned retooling device, retooling platform 2 lower extreme is equipped with the universal wheel to do benefit to convenient removal and fixed.

As shown in the attached drawings 1 and 2, the structure of the present application is schematically illustrated, and fig. 3 and 4 are schematic diagrams of a transposition mechanism, a mobile platform is arranged on the transposition mechanism, a push-pull lifting mechanism is illustrated in fig. 5 to 9, and fig. 10 is a schematic diagram of the present invention in use, the present invention is characterized in that a cylinder, a transposition motor and a push-pull motor can also be connected with a PLC control system, the control system controls the transposition mechanism, a mold changing table can be provided with universal wheels or not, and the mold changing table is not provided with universal wheels, when the mold changing device is butted with an injection molding machine, a limit baffle and a limit stop can be firstly detached, then a mold can be transported to the mold changing table through a mobile trolley, the mold is transported to the mobile platform, then the limit baffle and the limit stop can be installed, if the universal wheels are installed at the lower end of the mold changing table, the mold can be placed on the mobile platform through rotating the mold changing table, and a mechanism for bearing the mold, the mould or the mechanism carried by the mould can slide on the first mould slide way or the second mould slide way, the friction force of the movement of the mould or the mechanism carried by the mould is reduced, the first mould slide way and the second mould slide way can be alternately opposite to an injection molding machine injection molding cavity through the transposition mechanism, thus the mould or the mechanism carried by the mould on the first mould slide way and the second mould slide way can alternately enter the injection molding machine for injection molding, the mould or the mechanism carried by the mould can be hooked through a push-pull hook by arranging a push-pull lifting mechanism, the automatic movement and replacement of the mould or the carrying mechanism carried by the mould between the mould changing device and the mould changing trolley and the injection molding machine can be realized, meanwhile, the quick return of the mould or the carrying mechanism carried by the mould can be realized through a limit baffle and a limit stop, the production efficiency of the mould is improved, the utility model discloses an upper moving platform can be provided with at least, the two sets of dies can be the same or different, when the injection molding machine needs to produce different dies, one die changing device and the die changing trolley can meet the requirements, the die changing efficiency is greatly improved, and meanwhile, the production efficiency of workpieces is also improved.

Claims

1. The utility model provides a retooling device, includes retooling platform, its characterized in that: the mould changing table is provided with a transposition mechanism, the transposition mechanism is connected with the mould changing table, the transposition mechanism is provided with a moving platform, the moving platform is connected with the transposition mechanism and driven by the transposition mechanism, and the moving platform is at least provided with two mould bearing stations.

2. A die change apparatus as claimed in claim 1, wherein: the transposition mechanism comprises a transposition linear guide rail, a transposition sliding block, a transposition ball screw, a nut mounting seat, a connecting plate, a ball screw mounting plate and a transposition motor, the mold changing table comprises a support frame, a transposition support is arranged in the middle of the support frame and fixedly connected with the support frame, the left end and the right end of the transposition support are respectively provided with the transposition linear guide rail, the transposition ball screw is arranged in the middle of the transposition support and parallel to the transposition linear guide rail, the nut is sleeved on the transposition ball screw and fixedly connected with the nut mounting seat, the connecting plate is arranged below the transposition ball screw, the ball screw mounting plates are arranged on the connecting plate at intervals, the two ends of the connecting plate are fixedly connected with the transposition support, the front end and the rear end of the transposition ball screw are respectively connected with the ball screw mounting plate through bearings, and one end of the transposition ball screw penetrates out of the ball screw mounting plate and is fixedly And the transposition motor is fixed on the transposition support and is connected with the power supply, the lower end of the moving platform is hinged with the nut mounting seat, and two sides of the lower end of the moving platform are respectively in sliding connection with the transposition linear guide rail through the transposition sliding block.

3. A die change apparatus as claimed in claim 2, wherein: a push-pull lifting mechanism is arranged above the moving platform and comprises a push-pull mechanism and a lifting mechanism, 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 mounting plate, a nut mounting seat, a synchronizing wheel, a synchronous belt, a push-pull motor, a push-pull hook fixing seat and a push-pull hook, the front side and the rear side of the lower end of the push-pull hook bracket are respectively provided with the push-pull linear guide rail, the push-pull ball screw is arranged in the middle of the push-pull hook bracket, the left end and the right end of the push-pull hook bracket are respectively provided with the ball screw mounting plate, the push-pull linear guide rail is vertical to the transposition linear guide rail, the upper end of the push-pull linear guide rail is, one end of the push-pull ball screw penetrates out of the ball screw mounting plate and is provided with a synchronizing wheel, the synchronizing wheel is fixedly connected with the push-pull ball screw, the synchronizing wheel is connected with a synchronizing wheel on an output shaft of a push-pull motor through a synchronizing belt, the push-pull motor is fixed on a push-pull hook support, the push-pull hook fixing seat is located below the push-pull hook support, the front end and the rear end of the push-pull hook fixing seat are respectively connected with a push-pull linear guide rail through a push-pull slider in a sliding mode, the middle of the push-pull hook fixing seat is fixedly connected with a nut mounting seat at the lower end of the push-pull ball screw, a push-pull hook is fixed at the lower end of the push-pull hook fixing seat, an elevating mechanism is arranged at the upper end of the push-pull hook support, and the, The lifting plate is provided with a guide rod at four corners, the fixed plate is provided with a guide hole and a limiting hole, one end of the air cylinder is fixedly connected with the fixed plate, the other end of the air cylinder is fixedly connected with the lifting plate through a floating joint, the air cylinder is connected with a power supply, two sides of the air cylinder are respectively provided with a limiting screw, the lower end of the limiting screw penetrates through the limiting hole to be fixedly connected with the lifting plate, the lower end of the guide rod is fixedly connected with the lifting plate, the upper end of the guide rod sequentially penetrates through a first oilless bushing and a second oilless bushing to be arranged at the upper end of the fixed plate, and the first oilless bushing is arranged between the lifting plate and the fixed plate, first oilless bush and guide bar sliding connection, second oilless bush is located the guiding hole, second oilless bush outer wall and fixed plate fixed connection, inner wall and guide bar sliding connection, be equipped with the screw hole in the middle of the guide bar upper end, the screw rod lower extreme is through screw thread and guide bar threaded connection, the screw rod from upwards passing spring-supported, spring, gasket and nut in proper order and with nut threaded connection down, the spring-supported lower extreme touches with the fixed plate up end mutually, and the upper end contacts with the spring.

4. A die change apparatus as claimed in claim 3, wherein: the movable platform is provided with a first mold slide and a second mold slide in parallel, the first mold slide is two guide slide rails arranged in parallel at intervals, the second mold slide is two guide slide rails arranged in parallel at intervals, and the lower ends of the guide slide rails are fixedly connected with the movable platform.

5. A die change apparatus according to claim 4, wherein: the die is characterized in that limiting baffle plates are symmetrically arranged at the front and back of the left end of the first die slide way, limiting baffle plates are symmetrically arranged at the front and back of the left end of the second die slide way, the limiting baffle plates are fixedly connected with the left end of the guide slide way, limiting stop blocks are respectively arranged at the left end of the first die slide way and the left end of the second die slide way, and the limiting stop blocks are fixedly connected with the moving platform.

6. A die change apparatus as claimed in claim 3, wherein: first oilless bush side is equipped with spacing riser, spacing riser side and oilless bush outer wall fixed connection, spacing riser upper end and spacing diaphragm fixed connection, spacing diaphragm and fixed plate fixed connection.

7. The utility model provides a retooling platform truck which characterized in that: comprising a die change device according to any one of claims 1 to 6, wherein the lower end of the die change table is provided with universal wheels.