CN114290067B

CN114290067B - Plastic mould surface milling equipment

Info

Publication number: CN114290067B
Application number: CN202111576277.5A
Authority: CN
Inventors: 吴晓明
Original assignee: Shenzhen Huafujin Precision Industry Co ltd
Current assignee: Shenzhen Huafujin Precision Industry Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-12-27
Anticipated expiration: 2041-12-22
Also published as: CN114290067A

Abstract

The invention discloses a plastic mould surface grinding and milling device which comprises a machine tool base, wherein the upper surface of the machine tool base is connected with two hydraulic cylinders in a sliding manner, the output shafts of the hydraulic cylinders are fixedly connected with a functional block, the section of the functional block is in a concave shape with an opening facing one side, and a clamping mechanism for clamping a plastic mould is arranged in the functional block; the clamping mechanism comprises two servo motors, the servo motors are fixedly connected with the inner side walls of the corresponding functional blocks, the output shafts of the servo motors are fixedly connected with threaded cylinders, and the threaded cylinders are in threaded connection with first screw rods. Has the advantages that: the automatic clamping and milling machine can automatically adjust the most appropriate clamping force according to the weight of the plastic mold to carry out clamping, milling and milling, thereby avoiding the mold loss caused by excessive clamping force or instability caused by insufficient clamping force, having higher automation degree, automatically cleaning the placing table after the milling and milling are finished, and avoiding the influence of dust on the next mold to be milled and milled.

Description

Plastic mould surface milling equipment

Technical Field

The invention relates to the technical field of plastic mould surface grinding and milling, in particular to plastic mould surface grinding and milling equipment.

Background

The plastic products are seen everywhere in our lives, and the processing modes of the plastic products are various, wherein the injection molding is one of the methods, and in the injection molding process, one of the most important tools is a plastic mold, and plastic products with different shapes can be processed through molds with different cavities, and the plastic mold needs to be milled in the processing process, so that the appearance of the plastic mold is improved, and the corrosion resistance and the wear resistance of the surface of the plastic mold can be improved.

The invention discloses a plastic mould surface milling device, which is disclosed in the prior invention patent, such as a Chinese patent with the application patent number of CN201921144239.0 and mainly comprises a base, the milling device, a clamping device, a sliding rail, a connecting plate, a cylinder, a clamping plate, a telescopic rod, a fixing plate, a connecting block and the like.

Among this technical scheme, the reversal only can mill two faces behind the centre gripping, the limitation is great, and simultaneously, when the centre gripping, because the weight of different plastic mould is different, this technical scheme can't be according to the size of the weight adjustment clamping-force of plastic mould self, the too big mould surface damage that probably leads to of clamping-force, and the clamping-force undersize then can lead to the unstability, and milling the back, place bench and can pile up a lot of dusts, not clear up can be attached to next and wait to mill the mould surface, influence its milling, and manual cleaning wastes time and energy.

Disclosure of Invention

The invention aims to provide plastic mould surface grinding and milling equipment for solving the problems that clamping force cannot be automatically adjusted, only two surfaces can be ground and milled, manual cleaning of dust after grinding and milling is high in labor intensity and the like in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a grinding and milling device for the surface of a plastic mold comprises a machine tool base, wherein the upper surface of the machine tool base is connected with two hydraulic cylinders in a sliding mode, output shafts of the hydraulic cylinders are fixedly connected with a function block, the cross section of the function block is in a concave shape with an opening facing one side, and a clamping mechanism for clamping the plastic mold is arranged in the function block;

the fixture includes two servo motor, servo motor with correspond function block inside wall fixed connection, servo motor's output shaft fixedly connected with screw thread section of thick bamboo, screw thread section of thick bamboo threaded connection has first screw rod, the rotatory piece of first screw rod fixedly connected with, the ring channel has been seted up to the function block lateral wall, sliding connection has a plurality of travelers in the ring channel, the traveler is located the outside one end of ring channel common with rotatory piece lateral wall fixed connection, the clamp splice has been cup jointed in the slip of rotatory piece, rotatory piece inside wall fixedly connected with force sensing resistor, the lathe seat has a plurality of spliced poles through first chute sliding connection, the common fixedly connected with of the one end that the spliced pole is located first chute outside places the platform, one of them first chute lateral wall fixedly connected with resistance coil, one of them spliced pole lower surface fixedly connected with conducting block, a plurality of mounting grooves have been seted up to the ring channel inside wall, sliding connection has the dog in the mounting groove, fixedly connected with conductive spring between dog and the mounting groove inner wall that corresponds, conductive spring, force sensing resistor, conductive block pass through the wire electricity and connect.

Further, fixture still includes two second sliding chutes of seting up in the machine tool seat, sliding connection has the slider in the second sliding chute, the slider with correspond pneumatic cylinder fixed connection, the machine tool seat runs through to rotate through the bearing and is connected with the second screw rod, the second screw rod is located two one section in the second sliding chute is provided with revolves to opposite screw thread, and all the other parts are smooth structure, second screw rod and slider threaded connection, the second screw rod is located the outside one end fixedly connected with rocking handle of machine tool seat, place the platform and seted up two mesa grooves, mesa inslot sliding connection has the extension board, the extension board with place fixedly connected with second spring between the platform, the extension board offsets with the pneumatic cylinder that corresponds.

Furthermore, a damping pad is arranged at the sliding connection position of the connecting column and the first sliding groove, and a first spring is fixedly connected between the connecting column and the corresponding bottom wall of the first sliding groove.

Further, a portal frame is fixedly connected to the upper surface of the machine tool base, and a milling device is arranged on the portal frame.

Further, portal frame department is provided with the dust absorption mechanism who is used for clean dust, dust absorption mechanism includes, two hollow transfer boxes, transfer box and portal frame run through sliding connection, transfer box and correspondence the pneumatic cylinder passes through support fixed connection, the piston board has been cup jointed in the sealed slip of transfer box, the transfer box is close to the lateral wall of placing platform one side and runs through sliding connection and has two second racks, the transfer box is close to the lateral wall of placing platform one side and rotates through the bearing and be connected with the tooth section of thick bamboo, the second rack meshes with the tooth section of thick bamboo that corresponds, the output shaft lateral wall of pneumatic cylinder passes through the first rack of support fixedly connected with, first rack and correspondence the tooth section of thick bamboo meshing.

Furthermore, dust absorption mechanism still includes two hollow absorption blocks, absorption block fixed connection is corresponding the extension board upper surface, two lateral walls that the absorption block is relative all run through the fixedly connected with hose, two the lateral wall of the relative one side of absorption block all runs through a plurality of absorbent tubes of fixedly connected with, transfer box roof runs through the fixedly connected with discharge pipe.

Furthermore, check valves are arranged in the absorption pipe and the discharge pipe, and the area of the side wall of the piston plate is larger than the sum of the sectional areas of the absorption pipes.

Furthermore, the spacing groove has all been seted up to two inside walls that the mesa groove is relative, sliding connection has the stopper in the spacing groove, the stopper with correspond extension board lateral wall fixed connection, extension board and place the fixed connection between the platform have the elastic membrane.

The invention has the following advantages:

1. the plastic mold is placed on a placing table, the size of resistance of a resistance coil access circuit is changed through the contact position of a conductive block and a resistance coil, a servo motor drives a first screw rod to move, the mold is clamped through a rotating block and a clamping block, the shrinkage of a conductive spring is controlled through the resistance change of a force sensitive resistor and the resistance coil, when the clamping force reaches a proper value, a stop block is withdrawn, the servo motor rotates to drive the mold to rotate, the clamping force can be automatically adjusted according to the self weight of the mold, and the damage to the surface of the mold due to the fact that the clamping force is too large and the clamping force is too small to cause unstable clamping is avoided;

2. the clamping force can be automatically adjusted along with the gravity of the plastic mold without manual adjustment, so that the automation degree of the equipment is higher;

3. after the clamping of the die by the clamping block, the clamped die is driven to rotate by the servo motor, and the upper surface, the lower surface, the front surface and the rear surface can be milled by rotating the die, so that compared with the prior art that only two surfaces can be milled by rotating after clamping, more surfaces can be milled by clamping once;

4. the rocking handle is rotated, the two sliding blocks are driven by the second screw rod to move in the opposite direction or in the opposite direction, so that the two functional blocks can move in the opposite direction or in the opposite direction, the distance between the two functional blocks is changed, and meanwhile, the extension plate on the placing table can also be changed along with the change of the position of the hydraulic cylinder, so that the equipment can clamp, mill and mill dies with different sizes;

5. after carrying out the centre gripping through the clamp splice to the mould, the rethread pneumatic cylinder rises the mould and grinds and mill, grind and mill the back, when the rethread pneumatic cylinder puts down the mould, through the meshing between first rack, second rack and the tooth section of thick bamboo, make the motion of piston plate, bleed, thereby adsorb the mill dust of placing the platform surface through adsorption block and adsorption tube, thereby avoid the dust to adhere to the next mould surface of treating mill, produce the influence to milling, manual cleaning has been avoided simultaneously, and labor intensity is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a plastic mold surface milling apparatus according to the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an enlarged view of B in FIG. 1;

FIG. 4 is an enlarged view at C of FIG. 1;

FIG. 5 is a schematic structural diagram of a functional block in the plastic mold surface milling device according to the present invention;

FIG. 6 is a partial cross-sectional view taken along line D-D of FIG. 1;

FIG. 7 is a partial cross-sectional view E-E of FIG. 1;

FIG. 8 is a cross-sectional view of a placing table of a plastic mold surface milling device according to the present invention;

fig. 9 is a schematic circuit connection diagram of a plastic mold surface milling device according to the present invention.

In the figure: 1 machine tool seat, 2 hydraulic cylinders, 3 functional blocks, 4 servo motors, 5 threaded cylinders, 6 first screw rods, 7 rotating blocks, 8 annular grooves, 9 sliding columns, 10 first sliding grooves, 11 connecting columns, 12 first springs, 13 conductive blocks, 14 resistance coils, 15 clamping blocks, 16 force sensitive resistors, 17 mounting grooves, 18 stoppers, 19 conductive springs, 20 placing tables, 21 second sliding grooves, 22 sliding blocks, 23 second screw rods, 25 rocking handles, 26 table surface grooves, 27 extending plates, 28 second springs, 29 limiting grooves, 30 limiting blocks, 31 elastic films, 32 portal frames, 33 milling devices, 34 transit boxes, 35 absorbing blocks, 36 absorbing pipes, 37 toothed cylinders, 38 first racks, 39 second racks, 40 piston plates, 41 hoses and 42 discharge pipes.

Detailed Description

Referring to fig. 1-9, a plastic mold surface milling device comprises a machine tool base 1, wherein the upper surface of the machine tool base 1 is connected with two hydraulic cylinders 2 in a sliding manner, output shafts of the hydraulic cylinders 2 are fixedly connected with function blocks 3, the cross sections of the function blocks 3 are in a concave shape with an opening facing one side, and clamping mechanisms for clamping plastic molds are arranged in the function blocks 3;

the clamping mechanism comprises two servo motors 4, the servo motors 4 are fixedly connected with the inner side walls of the corresponding function blocks 3, the output shafts of the servo motors 4 are fixedly connected with threaded cylinders 5, the threaded cylinders 5 are in threaded connection with first screw rods 6, the first screw rods 6 are fixedly connected with rotating blocks 7, the side walls of the function blocks 3 are provided with annular grooves 8, a plurality of sliding columns 9 are connected in the annular grooves 8 in a sliding manner, one ends of the sliding columns 9, which are positioned outside the annular grooves 8, are fixedly connected with the side walls of the rotating blocks 7 together, clamping blocks 15 are sleeved with the rotating blocks 7 in a sliding manner, the sliding columns 9 can slide in the left and right directions and can rotate along the annular grooves 8, as shown in figure 2, the cross sections of the clamping blocks 15 are T-shaped, so that the clamping blocks 15 and the sliding connection clamping blocks 15 of the rotating blocks 7 cannot slide out of the rotating blocks 7, force sensitive resistors 16 are fixedly connected with the inner side walls of the rotating blocks 7, the force sensitive resistors 16 become larger along with the pressure exerted on the force sensitive resistors, and the resistance values become smaller gradually, for the prior art, which is not described herein, the machine tool seat 1 is slidably connected to a plurality of connecting posts 11 through a first sliding slot 10, one end of each connecting post 11 located outside the first sliding slot 10 is jointly and fixedly connected to a placing table 20, a resistance coil 14 is fixedly connected to a side wall of one first sliding slot 10, a conductive block 13 is fixedly connected to a lower surface of one connecting post 11, a plurality of mounting slots 17 are formed in an inner side wall of the annular groove 8, a stop 18 is slidably connected to the mounting slots 17, the stop 18 can stop the sliding post 9 to prevent the sliding post from rotating, a conductive spring 19 is fixedly connected between the stop 18 and an inner wall of the corresponding mounting slot 17, the conductive spring 19 can be contracted after being energized, and the contraction amount thereof increases as the current increases, which is not described herein in detail for the prior art, the conductive spring 19, the force sensitive resistor 16, the resistance coil 14, and the conductive block 13 are electrically connected through a conducting wire, the circuit connection relationship is as shown in fig. 9, the resistance value of the resistance coil 14 to the circuit can be changed by sliding the conductive block 13 downwards, the resistance value is increased along with the descending of the conductive block 13, so that when the plastic mold is placed on the placing table 20, according to the weight of different plastic molds, the sliding degree of the connecting column 11 is different, so that the resistance value of the resistance coil 14 to the circuit is different, the larger the weight of the plastic mold is, the larger the resistance value of the circuit is, when the force sensitive resistor 16 is not under pressure, i.e., when the clamping block 15 is not in contact with the plastic mold, the resistance value of the whole circuit is increased at the moment, the current is reduced, so that the contraction amount of the conductive spring 19 is reduced, at the moment, the stop block 18 slides out of the mounting groove 17, the sliding column 9 is blocked, so that the servo motor 4 drives the threaded cylinder 5 to rotate at the moment, after the rotation of the rotating block 7 is blocked, the threaded cylinder 5 can be in a threaded connection manner that the first screw rod 6 drives the rotating block 7 and the clamping block 15 to move towards the plastic mold, until the clamping block 6 is rotated, the clamping spring is driven by the rotating force of the rotating screw rod, so that the clamping spring is not reduced, at the clamping spring, at the clamping block 19 is not rotated again, at the clamping spring is driven by the rotating force of the rotating screw rod, so that the clamping spring is reduced, at the clamping spring, at the clamping cylinder 7 is not reduced, at the clamping cylinder, and the clamping cylinder is not rotated, at the clamping cylinder is rotated, at the clamping cylinder 7, thereby the clamping cylinder is rotated, the clamping cylinder is not rotated, the clamping cylinder is adjusted along with the clamping cylinder, and the clamping cylinder 7, thereby the clamping cylinder is adjusted by the clamping cylinder, the clamping cylinder 14, and the clamping cylinder is adjusted by the clamping cylinder 7, the clamping cylinder is adjusted by the clamping cylinder, thereby the plastic mold is adjusted by the plastic mold.

The clamping mechanism further comprises two second sliding grooves 21 formed in the machine tool base 1, sliding blocks 22 are connected in the second sliding grooves 21 in a sliding mode, the sliding blocks 22 are fixedly connected with corresponding hydraulic cylinders 2, the machine tool base 1 is connected with second screw rods 23 in a penetrating and rotating mode through bearings, one sections of the second screw rods 23 located in the two second sliding grooves 21 are provided with threads with opposite turning directions, the rest portions are of a smooth structure, the second screw rods 23 are in threaded connection with the sliding blocks 22, one ends of the second screw rods 23 located outside the machine tool base 1 are fixedly connected with rocking handles 25, two table surface grooves 26 are formed in the placing table 20, extending plates 27 are connected in the table surface grooves 26 in a sliding mode, second springs 28 are fixedly connected between the extending plates 27 and the placing table 20, the extending plates 27 are abutted against the corresponding hydraulic cylinders 2, the second screw rods 23 can be made to rotate by rotating the rocking handles 25, the threads with the opposite turning directions are arranged, the two sliding blocks 22 drive the hydraulic cylinders 2 to move oppositely or oppositely, so that the two functional blocks 3 move oppositely or oppositely, equipment can clamp grinding moulds with different sizes, the plastic rubber plates 27 can be stably moved along with the placing hydraulic cylinders 20, and the plastic plates 27 can be milled under the plastic plates 20.

The sliding connection department of spliced pole 11 and first sliding tray 10 is provided with the damping pad, and when spliced pole 11 slided a certain position under mould gravity, the setting of damping pad can make the mould leave and place a 20 time spliced pole 11 still can keep unchangeable in this position under the damping force, for prior art, does not describe here any more, and first spring 12 of fixedly connected with between spliced pole 11 and the first sliding tray 10 inner bottom wall that corresponds.

The upper surface of the machine tool base 1 is fixedly connected with a portal frame 32, and the portal frame 32 is provided with a milling device 33.

The portal frame 32 is provided with a dust suction mechanism for cleaning dust, the dust suction mechanism comprises two hollow transfer boxes 34, the transfer boxes 34 are connected with the portal frame 32 in a penetrating and sliding manner, the transfer boxes 34 are fixedly connected with corresponding hydraulic cylinders 2 through brackets, piston plates 40 are sleeved in the transfer boxes 34 in a sealing and sliding manner, the side wall of one side, away from the placing table 20, of each transfer box 34 is provided with a hole, so that one side, away from the placing table 20, of each piston plate 40 is not in a sealing state, so that the piston plates 40 can move freely, two second racks 39 are connected to the side wall, close to the placing table 20, of each transfer box 34 in a penetrating and sliding manner, the outer side wall, close to one side of the placing table 20, of each transfer box 34 is rotatably connected with a tooth cylinder 37 through a bearing, and the second racks 39 are meshed with the corresponding tooth cylinders 37, the lateral wall of the output shaft of the hydraulic cylinder 2 is fixedly connected with a first rack 38 through a bracket, the first rack 38 is meshed with a corresponding gear cylinder 37, as shown in fig. 7, the lateral wall of the transfer box 34 is provided with two protrusions, the two protrusions are rotatably connected with the gear cylinder 37 through a bearing, the first rack 38 is positioned on the side of the gear cylinder 37, and two second racks 39 are positioned below the gear cylinder 37, so that when the hydraulic cylinder 2 drives the function block 3 to move upwards, the piston plate 40 moves towards the direction close to the placing table 20, and discharges and collects dust absorbed in the transfer box 34, and when the hydraulic cylinder 2 drives the function block 3 to descend, the piston plate 40 moves towards the direction far away from the placing table 20, and the dust on the placing table 20 is absorbed through the absorption pipe 36.

Dust absorption mechanism still includes two hollow absorption pieces 35, absorption piece 35 fixed connection is at the extension board 27 upper surface that corresponds, it all runs through fixedly connected with hose 41 to adsorb two relative lateral walls of piece 35, when hose 41 can guarantee that absorption piece 35 moves along with extension board 27, can also guarantee with transfer box 34's intercommunication, two lateral walls that adsorb one side that the piece 35 is relative all run through a plurality of absorption tubes 36 of fixedly connected with, transfer box 34 roof runs through fixedly connected with discharge pipe 42, discharge pipe 42 is connected with the device of external storage dust, collect the processing in unison to the dust.

The absorption tube 36 and the discharge tube 42 are both provided with a one-way valve, the one-way valve in the absorption tube 36 only allows air to enter the absorption block 35 through the absorption tube 36 from the outside, the one-way valve in the discharge tube 42 only allows air to be discharged from the transfer box 34 into the discharge tube 42, so that the wet piston plate 40 moves left and right to absorb air through the absorption tube 36 and then discharge air through the discharge tube 42, and milled dust on the placing table 20 is absorbed through the absorption tube 36, the area of the side wall of the piston plate 40 is larger than the sum of the cross-sectional areas of the absorption tube 36, the flow of the air is constant due to the constant area of the side wall of the piston plate 40, and on the premise of constant flow, the flow rate and the flow rate of the fluid are inversely proportional to the square of the tube diameter, namely, the tube diameter is smaller, the flow rate of the fluid is faster, so that the air flow rate at the absorption tube 36 is accelerated, larger suction force is generated, and dust can be better absorbed.

Spacing groove 29 has all been seted up to two inside walls that mesa groove 26 is relative, sliding connection has stopper 30 in the spacing groove 29, stopper 30 and the 27 lateral wall fixed connection of extension board that correspond, setting through spacing groove 29 and stopper 30, it is spacing to extend the motion of board 27, make it only to follow the motion of mesa groove 26 horizontal direction, extension board 27 and place fixedly connected with elastic membrane 31 between the platform 20, elastic membrane 31 set up can be behind extension board 27 roll-off, carry out certain shutoff with naked mesa groove 26, thereby avoid the dust after the mill to fall into mesa groove 26 in, produce the influence to the slip that extends board 27.

According to the invention, firstly, according to the size of a plastic mould to be milled, the rocking handle 25 is rotated to rotate the second screw 23, and the two sliding blocks move in opposite directions or in a mutually opposite direction through the thread arrangement with opposite rotating directions, so that the hydraulic cylinder 2 and the functional block 3 are driven to move in opposite directions or in a mutually opposite direction, the distance between the two sets of hydraulic cylinders 2 and the functional block 3 is adjusted, and meanwhile, when the hydraulic cylinder 2 moves, the extension plate 27 is driven to move, so that the area of the placing table 20 is changed, and the placing stability of the plastic mould is ensured;

after the adjustment is completed, a plastic mold to be milled is placed on the placing table 20, under the gravity of the plastic mold, the placing table 20 drives the connecting column 11 to slide downwards, so that the contact position of the conductive block 13 and the resistance coil 14 is changed, the resistance of the resistance coil 14 accessing a circuit is increased, and the weight of the plastic mold is higher, the resistance of the accessing circuit is higher along with the increase of the resistance coil 14 accessing the circuit, the current in the circuit is reduced, the contraction quantity of the conductive spring 19 is reduced, the stop block 18 slides out of the mounting groove 17, at the moment, the servo motor 4 is started, the threaded cylinder 5 is rotated to drive the first screw rod 6 to rotate, the first screw rod 6 has the tendency of driving the rotating block 7 to rotate, and the stop block 18 is positioned outside the mounting groove 17 and plays a limiting role in the sliding column 9, at the moment, the rotating block 7 cannot rotate, under the condition of threaded connection, the rotation of the threaded cylinder 5 can make the first screw rod 6 move towards the outside of the threaded cylinder 5, so as to drive the rotating block 7 and the clamping block 15 to move towards the plastic mold until the clamping block 15 contacts with the plastic mold and clamps the plastic mold, after clamping, the hydraulic cylinder 2 is started, so that the plastic mold leaves the placing table 20, the servo motor 4 is continuously started, the plastic mold is further clamped by the clamping block 15, the pressure borne by the force sensitive resistor 16 is increased along with the continuous increase of the clamping force, the resistance value is reduced, the current in the circuit is increased along with the continuous reduction of the resistance value of the force sensitive resistor 16, the shrinkage of the conductive spring 19 is continuously increased, until the reduced resistance value is consistent with the resistance value of the circuit connected with the resistance coil 14, the conductive spring 19 is completely shrunk into the mounting groove 17 at the moment, the rotation limit of the sliding column 9 is removed, at the moment, the rotation of the servo motor 4 drives the threaded cylinder 5 to rotate, the pressure between the threads of the threaded cylinder 5 and the first screw 6 is larger, and at the moment, the rotation of the threaded cylinder 5 only drives the first screw 6 to rotate, so that the rotating block 7 drives the clamping block 15 to rotate, and the plastic mold rotates;

when the functional block 3 moves upwards, the output shaft of the hydraulic cylinder 2 drives the first rack 38 to move upwards, so as to drive the gear cylinder 37 to rotate, so that the gear cylinder 37 drives the second rack 39 to move, so as to enable the piston plate 40 to move towards the placing table 20, and the dust absorbed in the transfer box 34 is discharged through the discharge pipe 42;

opening the milling device 33, enabling the plastic mold to approach the milling device 33 through the hydraulic cylinder 2 for milling, and enabling the plastic mold to rotate through the servo motor 4 to mill different surfaces;

after the milling is finished, the plastic mold is placed back to the surface of the placing table 20 through the hydraulic cylinder 2, in the process, an output shaft of the hydraulic cylinder 2 drives the first rack 38 to move downwards so as to drive the gear cylinder 37 to rotate, so that the second rack 39 meshed with the gear cylinder 37 moves to drive the piston plate 40 to move in the direction away from the placing table 20, so that the absorption pipe 36 generates suction force through the movement of the piston plate 40, milling dust on the surface of the placing table 20 is absorbed, and is absorbed into the transfer box 34 through the absorption block 35 and the hose 41 to wait for being discharged;

after the plastic mold is placed on the placing table 20, the plastic mold cannot rotate any more at this time, the servo motor 4 is started at this time, the plastic mold cannot rotate, and the clamping block 15 is in a state of clamping the plastic mold, so that the clamping block 15 and the rotating block 7 cannot rotate, at this time, the rotation of the servo motor 4 drives the threaded cylinder 5 to rotate, the first screw rod 6 can slide towards the interior of the threaded cylinder 5 through threaded connection to contact with the plastic mold, at this time, the pressure borne by the force sensitive resistor 16 is reduced, the resistance value is increased, the stop block 18 slides into the mounting groove 17 again to block the sliding column 9, and at this time, the servo motor 4 can drive the rotating block 7 and the clamping block 15 to reset;

and after resetting, taking down the milled plastic mold, resetting the placing table 20, putting the plastic mold to be milled on the placing table 20 again, and continuing milling according to the steps.

Claims

1. The plastic mould surface milling equipment comprises a machine tool base (1) and is characterized in that the upper surface of the machine tool base (1) is connected with two hydraulic cylinders (2) in a sliding manner, output shafts of the hydraulic cylinders (2) are fixedly connected with a functional block (3), the cross section of the functional block (3) is in a concave shape with an opening facing one side, and a clamping mechanism for clamping a plastic mould is arranged in the functional block (3);

the clamping mechanism comprises two servo motors (4), the servo motors (4) are fixedly connected with the corresponding inner side walls of the functional blocks (3), the output shafts of the servo motors (4) are fixedly connected with threaded cylinders (5), the threaded cylinders (5) are in threaded connection with first screw rods (6), the first screw rods (6) are fixedly connected with rotary blocks (7), the side walls of the functional blocks (3) are provided with annular grooves (8), a plurality of sliding columns (9) are slidably connected in the annular grooves (8), one ends, located outside the annular grooves (8), of the sliding columns (9) are fixedly connected with the side walls of the rotary blocks (7) together, the rotary blocks (7) are slidably sleeved with clamping blocks (15), the inner side walls of the rotary blocks (7) are fixedly connected with force sensitive resistors (16), the machine tool base (1) is slidably connected with a plurality of connecting columns (11) through first sliding grooves (10), one ends, located outside the first sliding grooves (10), of the connecting columns (11) are fixedly connected with placing tables (20) together, one end of the side walls of the first sliding grooves (10) is fixedly connected with a resistor coil (14), one end of the connecting columns (11) is fixedly connected with a plurality of the inner side walls of the connecting columns (17), and one connecting grooves (17) are fixedly connected with a plurality of the inner side walls of the annular grooves (17), the check block (18) is fixedly connected with a conductive spring (19) between the inner wall of the corresponding mounting groove (17), the conductive spring (19), the force sensitive resistor (16), the resistor coil (14) and the conductive block (13) are electrically connected through a lead, the resistance value of the resistor coil (14) connected into the circuit can be changed by sliding the conductive block (13) downwards, the resistance value is increased along with the reduction of the conductive block (13), so that when the plastic mold is placed on the placing table (20), according to the weight of different plastic molds, the sliding degree of the connecting column (11) is different, so that the resistance value of the resistor coil (14) connected into the circuit is different, the larger the weight of the plastic mold is, the larger the resistance value of the connected circuit is, when the force sensitive resistor (16) is not stressed, namely when the clamping block (15) is not contacted with the plastic mold, the resistance value of the whole circuit is increased at the moment, the current is reduced, so that the shrinkage of the conductive spring (19) is reduced, at the check block (18) slides out of the mounting groove (17), the sliding column (9) is blocked, so that the servo motor (4) drives the threaded cylinder (5) to rotate, and the screw (7) is connected with the clamping block (7) through the rotary screw (6) until the rotary screw (7), the pressure that force sensing resistor (16) received also constantly increases, the resistance constantly reduces, circuit current constantly increases, electrically conductive spring (19) constantly shrink, when the resistance that until reduces is unanimous with resistance coil (14) access circuit's resistance, electrically conductive spring (19) shrink completely into mounting groove (17) this moment, the rotation of traveller (9) is no longer spacing this moment, servo motor (4) drive screw thread section of thick bamboo (5) rotation again this moment, can drive first screw rod (6) and rotate together, thereby make rotatory piece (7) rotate, the plastic mould that drives the centre gripping rotates, thereby make equipment can be by oneself according to the weight adjustment clamping-force of plastic mould.

2. The plastic mold surface milling equipment as claimed in claim 1, wherein the clamping mechanism further comprises two second sliding grooves (21) formed in the machine tool base (1), sliding blocks (22) are slidably connected in the second sliding grooves (21), the sliding blocks (22) correspond to the hydraulic cylinders (2) in fixed connection, the machine tool base (1) is connected with a second screw (23) through a bearing in a penetrating and rotating mode, the second screw (23) is located in two sections in the second sliding grooves (21) and is provided with threads opposite in rotating direction, the rest sections are of a smooth structure, the second screw (23) is in threaded connection with the sliding blocks (22), the second screw (23) is located at one end of the outer portion of the machine tool base (1) and is fixedly connected with a rocking handle (25), two table surface grooves (26) are formed in the placing table (20), an extension plate (27) is slidably connected in the table surface grooves (26), a second spring (28) is fixedly connected between the extension plate (27) and the placing table (20), and the extension plate (27) is abutted against the corresponding hydraulic cylinders (2).

3. The plastic mold surface milling equipment as claimed in claim 1, wherein a damping pad is disposed at the sliding connection between the connecting column (11) and the first sliding groove (10), and a first spring (12) is fixedly connected between the connecting column (11) and the bottom wall of the corresponding first sliding groove (10).

4. The plastic mold surface milling equipment as claimed in claim 2, wherein a gantry (32) is fixedly connected to the upper surface of the machine tool base (1), and a milling device (33) is arranged on the gantry (32).

5. The plastic mold surface milling equipment as claimed in claim 4, wherein a dust suction mechanism for cleaning dust is arranged at the portal frame (32), the dust suction mechanism comprises two hollow transfer boxes (34), the transfer boxes (34) are connected with the portal frame (32) in a penetrating and sliding manner, the transfer boxes (34) are fixedly connected with the corresponding hydraulic cylinders (2) through a support, a piston plate (40) is sleeved in the transfer boxes (34) in a sealing and sliding manner, two second racks (39) are connected to the side wall of one side, close to the placing table (20), of the transfer boxes (34) in a penetrating and sliding manner, the outer side wall of one side, close to the placing table (20), of the transfer boxes (34) is rotatably connected with a tooth cylinder (37) through a bearing, the second racks (39) are engaged with the corresponding tooth cylinder (37), the side wall of the output shaft of the hydraulic cylinder (2) is fixedly connected with a first rack (38) through a support, and the first racks (38) are engaged with the corresponding tooth cylinders (37).

6. The plastic mold surface milling equipment as claimed in claim 5, wherein the dust absorption mechanism further comprises two hollow absorption blocks (35), the absorption blocks (35) are fixedly connected to the upper surfaces of the corresponding extension plates (27), two opposite side walls of the absorption blocks (35) are fixedly connected with hoses (41) in a penetrating manner, two opposite side walls of the absorption blocks (35) are fixedly connected with a plurality of absorption tubes (36) in a penetrating manner, and the top wall of the transit box (34) is fixedly connected with a discharge tube (42) in a penetrating manner.

7. The plastic mold surface milling apparatus as defined in claim 6, wherein check valves are provided in both the suction pipe (36) and the discharge pipe (42), and the area of the side wall of the piston plate (40) is larger than the sum of the sectional areas of the suction pipes (36).

8. The plastic mold surface milling equipment as claimed in claim 2, wherein two opposite inner side walls of the table surface groove (26) are provided with limiting grooves (29), limiting blocks (30) are slidably connected in the limiting grooves (29), the limiting blocks (30) are fixedly connected with the corresponding side walls of the extension plates (27), and elastic membranes (31) are fixedly connected between the extension plates (27) and the placing table (20).