CN113025798A

CN113025798A - Mould heat treatment equipment

Info

Publication number: CN113025798A
Application number: CN202110224139.4A
Authority: CN
Inventors: 贾世宁; 顾纯君; 朱洋
Original assignee: Hongzhen Precision Mould Wujiang Co ltd
Current assignee: Hongzhen Precision Mould Wujiang Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-06-25
Anticipated expiration: 2041-03-01
Also published as: CN113025798B

Abstract

The utility model relates to a mold heat treatment device, which belongs to the technical field of mold processing and comprises a furnace body with an opening at one side and a furnace door used for closing the opening of the furnace body, wherein a plurality of heating wires are fixedly arranged on the inner wall of the furnace body, a plurality of support rods are fixedly arranged on the inner bottom wall of the furnace body, the top ends of the support rods are hinged with levers, the hinge axis at the middle part of each lever is horizontally arranged, the two ends of each lever are hinged with connecting rods which are oppositely arranged, and the top ends of the connecting rods are fixedly provided with contact rods used; the diapire is equipped with the direction subassembly of the vertical lift of a plurality of confession connecting rods in the furnace body, and the diapire is equipped with and is used for driving all levers simultaneously along the synchronous pivoted actuating mechanism in self middle part articulated axis, and this application has the mould be heated more evenly when the heating, and then improves the effect of the intensity of mould self and performance such as hardness.

Description

Mould heat treatment equipment

Technical Field

The application relates to the technical field of die machining, in particular to die heat treatment equipment.

Background

The die is a tool which enables a blank to be a product with a specific shape and a specific size under the action of external force; in the processing of mould, need heat the mould embryo to improve performances such as mould self hardness and intensity, and the heating at the mould often uses resistance furnace.

The existing Chinese patent with reference to publication number CN103940219A discloses a box-type resistance furnace, which comprises a furnace body and a furnace door, wherein the furnace door is arranged on the furnace body, air cylinders capable of enabling the furnace door to move up and down are arranged on two sides of the furnace door, the furnace door is in sliding connection with the furnace body, the furnace body comprises an outer shell and an inner shell, a vacuum gap is arranged between the outer shell and the inner shell, heat-resistant bricks are covered on the inner wall of the inner shell, heating elements are arranged between the heat-resistant bricks on two side surfaces of the inner wall of the inner shell, two parallel vertical heat-insulating plates are fixed on the top surface of the inner wall of the inner shell, and a gap is arranged between; the furnace door is pushed by the air cylinder, so that labor force is saved.

In view of the above-mentioned related art, the inventor believes that there is a defect that when the mold is placed in the furnace body for heating, the lower surface of the mold cannot contact with hot air, so that the mold is heated unevenly, and the strength, hardness and other properties of the mold are reduced.

Disclosure of Invention

In order to embody the even heating of the die during heating so as to improve the strength, hardness and other properties of the die, the application provides die heat treatment equipment.

The application provides a mould heat treatment equipment adopts following technical scheme:

a mold heat treatment device comprises a furnace body with an opening on one side and a furnace door for sealing the opening of the furnace body, wherein a plurality of electric heating wires are fixedly arranged on the inner wall of the furnace body, a plurality of support rods are fixedly arranged on the inner bottom wall of the furnace body, the top ends of the support rods are hinged with levers, the hinged axes in the middle parts of the levers are horizontally arranged, two ends of each lever are hinged with connecting rods which are oppositely arranged, and the top ends of the connecting rods are fixedly provided with contact rods for horizontally supporting a mold; the bottom wall in the furnace body is provided with a plurality of guide assemblies for vertical lifting of the connecting rods, and the bottom wall in the furnace body is provided with a driving mechanism for driving all the levers to synchronously rotate along the hinged axes at the middle part of the levers.

By adopting the technical scheme, the moulds are placed on the groups of opposite contact rods, the furnace doors are closed to heat the electric heating wires, the moulds are erected in the furnace body, and the lower surfaces of the moulds can be heated more uniformly; make the lever rotate along the articulated axis at self middle part through actuating mechanism, and then make relative connecting rod drive relative contact lever and carry out the oscilaltion respectively, direction subassembly makes the connecting rod keep vertical lift simultaneously, and then make the contact lever remain the horizontality throughout, and then stability when having improved the mould heating, and the mould can erect on the contact lever of difference by the interval, can make the position of mould lower surface and different contact lever contact can be continuous with contact lever separation or contact, finally make the mould lower surface carry out better being heated with the position of contact lever contact, make the mould wholly be heated more evenly, the intensity and the hardness isoterformance of mould self have been improved.

Optionally, the two ends of the contact rod are respectively and fixedly provided with a horizontally arranged stabilizer bar, and the stabilizer bars on the oppositely arranged contact rods are distributed in a staggered manner.

Through adopting above-mentioned technical scheme, stabilizer bar and contact bar support the mould simultaneously, further improvement the lift stability of mould when heating in the furnace body to the stabilizer bar can go up and down with the contact bar synchronization, makes being heated that the position of mould lower surface and stabilizer bar contact can be better.

Optionally, the driving mechanism includes a reciprocating motor, a rotating shaft, a plurality of cams, a plurality of rockers and a plurality of sliding sleeves, the bottom wall in the furnace body is provided with a plurality of accommodating grooves, the cams rotate in the accommodating grooves, the rotating shaft is parallel to the hinge axis in the middle of the levers, all the levers are parallel to each other and distributed along the same straight line, all the cams are fixedly sleeved on the same rotating shaft, one end of the rotating shaft extends out of the furnace body and is fixed with the reciprocating motor, and the reciprocating motor is fixed on the outer side; the bottom end of the rocker extends into the accommodating groove and is rotatably connected to the end face of the cam at a position far away from the rotating shaft, the top end of the rocker is hinged with the sliding sleeve, the sliding sleeve is sleeved on the lever in a sliding manner, and the hinged axes at the two ends of the rocker are parallel to the axis of the rotating shaft; when the sliding sleeve slides to a position close to the hinged position of the middle part of the lever, the contact rod above the lever close to the sliding sleeve is higher than the contact rod far away from the sliding sleeve, and meanwhile, one end of the cam far away from the rotating shaft faces upwards.

Through adopting above-mentioned technical scheme, start reciprocating motor and make the pivot rotate, the pivot drives all cams simultaneously and rotates, and the cam drives the rocker and swings to the rocker drives the sliding sleeve and slides on the lever, and the lever rotates simultaneously, makes two relative connecting rods rise respectively and reduce on the lever, has improved the rotation efficiency of lever, makes the even more high-efficient and stable of being heated of mould.

Optionally, the lever circumference lateral wall is located one side that the articulated department in middle part is close to the sliding sleeve, and the one end that lever circumference lateral wall is close to the sliding sleeve is all fixed the cover and is equipped with the limiting plate, and two limiting plates are located the relative both sides of sliding sleeve respectively.

Through adopting above-mentioned technical scheme, the setting up of limiting plate has reduced the position that the sliding sleeve slided to lever middle part and the articulated department of tip, and then provides good guarantee to the stability of rotation of lever, connecting rod and the lift stability of contact arm.

Optionally, the guide assembly comprises a fixing column and a vertically arranged guide sleeve, the fixing column is fixed at a position, located on one side of the connecting rod, of the bottom wall in the furnace body, the fixing column is fixed with the guide sleeve, and the connecting rod penetrates through the guide sleeve.

Through adopting above-mentioned technical scheme, when the lever drove the connecting rod and remove, the connecting rod slided in the uide bushing for the connecting rod carries out the ascending removal in vertical direction, has improved the lift stability of connecting rod.

Optionally, a plurality of parallel tracks are fixedly arranged on the ground on one side of the opening of the furnace body, a same pulley is connected to all the tracks in a sliding manner, a plurality of horizontally arranged inserting plates are fixedly arranged on one side of the pulley, which is close to the furnace body, and the horizontal height of each inserting plate is lower than the highest height of the contact rod.

Through adopting above-mentioned technical scheme, place the mould on the picture peg, promote the coaster and make the picture peg insert in the furnace mouth, the mould removes the top to all contact levers this moment, makes one of them risees in the relative contact lever through actuating mechanism, and a plurality of contact levers that rise are with mould jack-up and break away from the picture peg, can push away the coaster from the furnace body, and the mould is steady overhead on the contact lever this moment, has improved the material loading efficiency and the security of mould.

Optionally, the bottom end of the pulley is rotatably connected with a plurality of pulleys, each rail is provided with at least two pulleys, the circumferential side wall of each pulley is provided with a circular groove, and the rail is located in the groove.

By adopting the technical scheme, when the pulley moves along the track, the pulley rolls on the track, and meanwhile, the track is always positioned in the groove, so that the pulley can move more conveniently, and the stability of the pulley during moving is improved.

Optionally, a plurality of dovetail strips have vertically been set firmly to the lateral wall of furnace gate and furnace body laminating, and a plurality of dovetails have been seted up to the lateral wall of furnace body and furnace gate laminating, and the dovetail strip vertically slides in the dovetail, and the furnace body top is equipped with and is used for driving the furnace gate to go up and down with the elevating system of switching fire door.

Through adopting above-mentioned technical scheme, elevating system drives the furnace gate and goes up and down, and the dovetail vertically slides in the dovetail simultaneously, has improved the stability when the furnace gate goes up and down to make the switching of fire door more convenient and safe.

Optionally, elevating system includes support frame, back shaft, reel and lifting rope, and the support frame is total two and fix respectively and be close to the both ends of fire door one side at the outer top wall of furnace body, and the back shaft horizontal rotation is connected between two support frames, and the reel has a plurality ofly and all fixes the cover and establish on the back shaft, all is fixed with a lifting rope on every reel, and the bottom and the furnace gate upper surface that the reel was kept away from to the lifting rope are fixed.

Through adopting above-mentioned technical scheme, rotate the back shaft and make the reel rotate, and then make the outside lifting rope of reel shorten or extend for the lift of furnace gate is more convenient.

Optionally, a large gear is coaxially and fixedly arranged at one end of the supporting shaft, a lifting motor is fixedly arranged on the outer top wall of the furnace body, a small gear is coaxially and fixedly arranged on the lifting motor, the small gear is parallel to the large gear, and the small gear is connected with the large gear through a chain.

Through adopting above-mentioned technical scheme, start elevator motor and make the pinion rotate, the pinion drives the gear wheel through the chain and rotates, and the gear wheel drives the back shaft and rotates, and then makes the lift of furnace gate more convenient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the mold is arranged in the furnace body in an overhead manner, and the lower surface of the mold can be heated more uniformly; the lever is rotated along the hinge axis in the middle of the lever through the driving mechanism, so that the opposite connecting rods drive the opposite contact rods to respectively lift up and down, the dies can be erected on different contact rods at intervals, and finally the contact positions of the lower surfaces of the dies and the contact rods are better heated, so that the dies are integrally heated more uniformly, and the strength, hardness and other properties of the dies are improved;

2. the reciprocating motor is started to enable the rotating shaft to rotate, the rotating shaft simultaneously drives all the cams to rotate, the cams drive the rocking rods to swing, the rocking rods drive the sliding sleeves to slide on the levers, and meanwhile the levers rotate, so that two opposite connecting rods on the levers are respectively lifted and lowered, the rotating efficiency of the levers is improved, and the molds are heated uniformly, efficiently and stably;

3. place the mould on the picture peg, promote the coaster and make the picture peg insert in the furnace mouth, the mould removes the top to all contact levers this moment, makes one of them risees in the relative contact lever through actuating mechanism, and a plurality of contact levers that rise are with mould jack-up and break away from the picture peg, can push away the coaster from the furnace body, and the mould is stabilized the frame on the contact lever this moment, has improved the material loading efficiency and the security of mould.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic view showing the structure of the driving mechanism;

FIG. 3 is a schematic diagram showing the structure of the groove;

fig. 4 is a partial sectional view showing a dovetail bar.

In the figure, 1, a furnace body; 11. a furnace door; 12. an electric heating wire; 13. a dovetail strip; 14. a dovetail groove; 15. a limiting column; 16. accommodating grooves; 2. a support bar; 21. a lever; 211. a limiting plate; 22. a connecting rod; 23. a contact lever; 24. a stabilizer bar; 3. a drive mechanism; 31. a reciprocating motor; 32. a rotating shaft; 33. a cam; 34. a rocker; 35. a sliding sleeve; 4. a guide assembly; 41. fixing a column; 42. a guide sleeve; 5. a track; 51. a pulley; 52. inserting plates; 53. a pulley; 531. a groove; 6. a lifting mechanism; 61. a support frame; 62. a support shaft; 63. a reel; 64. a lifting rope; 7. a lifting motor; 71. a pinion gear; 72. and a gearwheel.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a mold heat treatment device.

Referring to fig. 1 and 2, a mold heat treatment device comprises a furnace body 1 with an opening at one side, a furnace door 11 for opening and closing a furnace mouth is connected to the side wall of the opening of the furnace body 1 in a vertical sliding manner, a plurality of electric heating wires 12 are fixedly arranged on the inner wall of the furnace body 1, and a lifting mechanism 6 for driving the furnace door 11 to lift is arranged at the top of the furnace body 1; the bottom wall sets firmly two vertical and relative bracing pieces 2 that set up in furnace body 1, the top of bracing piece 2 all articulates there is lever 21, two levers 21 are parallel to each other, the middle part of lever 21 is articulated with bracing piece 2 top, and the articulated axis level of lever 21 sets up, the both ends of lever 21 all articulate the connecting rod 22 of vertical setting, the articulated axis of connecting rod 22 all is on a parallel with the articulated axis in lever 21 middle part, the top of two connecting rods 22 all is fixed with the contact bar 23 that the level set up and be parallel to each other, the both ends of contact bar 23 all set firmly the stabilizer bar 24 of horizontal setting, the stabilizer bar 24 staggered arrangement on the relative contact bar 23; the inner bottom wall of the furnace body 1 is provided with a plurality of groups of guide components 4 for the connecting rods 22 to stably and vertically lift, and the furnace body 1 is internally provided with a driving mechanism 3 for simultaneously driving the levers 21 to synchronously rotate.

The furnace door 11 is opened through the lifting mechanism 6, the mold is placed on the contact rods 23 and the stabilizing rods 24 above the two levers 21, the furnace door 11 is closed through the lifting mechanism 6, the heating wires 12 are electrified to heat up, the two levers 21 are intermittently rotated through the driving mechanism 3, when the levers 21 are rotated, the two connecting rods 22 on the same lever 21 are respectively lifted or lowered, one of the two opposite contact rods 23 drives the stabilizing rod 24 to jack the mold, the other contact rod 23 and the stabilizing rod 24 fixed on the contact rod 23 are separated from the lower surface of the mold, and the reciprocating motion is carried out, so that the mold can be overhead heated by the contact rods 23 and the stabilizing rods 24 in the furnace body 1, different contact rods 23 and stabilizing rods 24 are intermittently contacted with different positions of the lower surface of the mold for supporting, and the positions of the lower surface of the mold, which are contacted with the

contact rods

23 and 24, can be better heated, and then make the whole of mould be heated more evenly, improved properties such as intensity and hardness of mould self.

Referring to fig. 1 and 2, the driving mechanism 3 includes a reciprocating motor 31, a rotating shaft 32, two cams 33, two rockers 34 and two sliding sleeves 35, the reciprocating motor 31 is fixed on the outer side wall of the furnace body 1, the reciprocating motor 31 is coaxially fixed with the rotating shaft 32, two accommodating grooves 16 respectively located below the two levers 21 are formed on the inner bottom wall of the furnace body 1, the two accommodating grooves 16 are penetrated by the rotating shaft 32, and the axis of the rotating shaft 32 is parallel to the hinge axis of the levers 21 and the supporting rods 2; the two cams 33 are respectively positioned in the two accommodating grooves 16, and the two cams 33 are fixedly sleeved on the rotating shaft 32; the top ends of the two rocking bars 34 extend into the two accommodating grooves 16 respectively and are rotatably connected with the positions, far away from the rotating shaft 32, on the end faces of the corresponding cams 33, the top ends of the rocking bars 34 are hinged to the sliding sleeve 35, the sliding sleeve 35 is slidably sleeved on the lever 21, the hinged axes at the two ends of the rocking bars 34 are parallel to the axis of the rotating shaft 32, when the sliding sleeve 35 is located at the position close to the hinged position of the middle part of the lever 21, the contact rod 23 close to the sliding sleeve 35 is higher than the contact rod 23 far away from the sliding sleeve 35, and one end, far away from.

Starting reciprocating motor 31 makes pivot 32 drive two cams 33 synchronous rotation, and two cams 33 drive two rocking bars 34 synchronous motion, and rocking bar 34 drives sliding sleeve 35 and slides on lever 21, and lever 21 rotates simultaneously for two contact bars 23 of lever 21 top rise respectively or reduce, have improved the even efficiency of being heated of mould.

Referring to fig. 2, each lever 21 is fixedly sleeved with two limiting plates 211, and the two limiting plates 211 are respectively located at two opposite sides of the sliding sleeve 35, wherein one limiting plate 211 is located at one side of the hinged position of the middle portion of the lever 21 close to the sliding sleeve 35, and the other limiting plate 211 is located at one end of the lever 21 close to the sliding sleeve 35; when the sliding sleeve 35 slides on the lever 21, the limiting plate 211 can reduce the possibility that the sliding sleeve 35 is damaged when moving to the middle part of the lever 21 and the hinged part of the end part, so that the rotation of the lever 21 and the lifting of the connecting rod 22 are well guaranteed.

Referring to fig. 2, the guide assembly 4 includes a fixing column 41 and a guide sleeve 42 fixed on one side of the fixing column 41, the bottom end of the fixing column 41 is fixed on the inner bottom wall of the furnace body 1, the fixing column 41 is located on one side of the connecting rod 22, the guide sleeve 42 is vertically arranged, and the connecting rod 22 passes through the guide sleeve 42; when the lever 21 rotates, the connecting rod 22 vertically ascends and descends in the guide sleeve 42, so that the ascending and descending stability of the mold during heating in the furnace body 1 is improved.

Referring to fig. 1 and 3, two rails 5 are fixedly arranged on the ground of the furnace body 1 on one side of the furnace door 11, the length direction of the rails 5 is perpendicular to the axis of the rotating shaft 32, a pulley 51 is connected on the rails 5 in a sliding manner, two horizontally arranged inserting plates 52 are fixed on one side of the pulley 51 close to the furnace body 1, the horizontal height of the inserting plates 52 is lower than the maximum height capable of being lifted by the contact rods 23 and higher than the upper surface of the contact rods 23 when the lever 21 is in a horizontal state, and the two inserting plates 52 are positioned between the two supporting rods 2; the lower surface of the pulley 51 is rotatably connected with four pulleys 53, each rail 5 is provided with two pulleys 53, the circumferential side wall of each pulley 53 is provided with an annular groove 531, and the rail 5 is positioned in the groove 531; make lever 21 keep the level through actuating mechanism 3 earlier, place the mould on two picture peg 52 again, promote coaster 51 and make pulley 53 drive recess 531 and roll on track 5, picture peg 52 drives the mould and moves to contact rod 23 and stabilizer bar 24 top, makes contact rod 23 stabilizer bar 24 rise and jack-up the mould through actuating mechanism 3, can push coaster 51 away from furnace body 1, has improved the material loading security and the stability of mould.

Referring to fig. 1 and 4, two limit columns 15 are vertically and fixedly arranged on the side wall of the furnace body 1 at the furnace mouth, the two limit columns 15 are respectively attached to two opposite sides of the furnace door 11, two dovetail grooves 14 are vertically and fixedly arranged on the side wall of the furnace door 11 attached to the furnace body 1, and the dovetail grooves 14 vertically slide in the dovetail grooves 14; the top of the furnace body 1 is provided with a lifting mechanism 6 for driving the furnace door 11 to lift, the lifting mechanism 6 comprises a support frame 61 vertically and fixedly arranged on the opposite side wall of the furnace body 1 and close to the position of the furnace door 11, a support shaft 62 horizontally and rotatably connected to the top of the support frame 61, two winding wheels 63 coaxially and fixedly arranged on the rotating shaft 32, and two lifting ropes 64 respectively fixed with the two winding wheels 63, the support shaft 62 is higher than the outer top wall of the furnace body 1, and the bottom ends of the two lifting ropes 64 are fixed with the furnace door 11; a lifting motor 7 is fixedly arranged on the outer top wall of the furnace body 1, a pinion 71 is fixedly arranged on the lifting motor 7 in a coaxial mode, a bull gear 72 is fixedly arranged on one end of the rotating shaft 32 in a coaxial mode, the axes of the pinion 71 and the bull gear 72 are both parallel to the axis of the supporting shaft 62, the diameter of the pinion 71 is smaller than that of the bull gear 72, and the pinion 71 and the bull gear 72 are in chain transmission.

The lifting motor 7 is started, so that the pinion 71 drives the bull gear 72 to rotate through a chain, the bull gear 72 drives the two reels 63 to synchronously rotate through the support shaft 62, further, the lifting rope 64 positioned outside the reels 63 contracts or extends, and meanwhile, the dovetail strip 13 vertically ascends and descends in the dovetail groove 14, and the efficiency and the safety of opening and closing the furnace opening by the furnace door 11 are improved.

The implementation principle of the mold heat treatment equipment in the embodiment of the application is as follows: starting the lifting motor 7, so that the pinion 71 drives the bull gear 72 to rotate through a chain, the bull gear 72 drives the two reels 63 to synchronously rotate through the support shaft 62, further, the lifting ropes 64 positioned outside the reels 63 are contracted, the dovetail bar 13 is lifted in the dovetail groove 14, and the furnace door 11 is lifted to open a furnace opening;

placing the mold on two insert plates 52, pushing the pulley 51 to make the pulley 53 drive the groove 531 to roll on the track 5, and the insert plates 52 drive the mold to move above the contact rod 23 and the stabilizing rod 24;

starting the reciprocating motor 31 to enable the rotating shaft 32 to drive the two cams 33 to synchronously rotate, enabling the two cams 33 to drive the two rockers 34 to synchronously move, enabling the rockers 34 to drive the sliding sleeves 35 to slide on the levers 21, enabling the levers 21 to rotate simultaneously, enabling one of the two contact rods 23 above the same lever 21 to be lifted and jacking up the mold, and then pushing the pulley 51 away from the furnace body 1, and then starting the lifting motor 7 to enable the furnace door 11 to close the furnace mouth;

the heating wire 12 carries out the circular telegram and intensifies, make two levers 21 carry out intermittent type nature through actuating mechanism 3 once more and rotate, when lever 21 rotates, two connecting rods 22 on same lever 21 rise or reduce respectively, make two relative contact bars 23 one of them drives stabilizer bar 24 with the mould jack-up, another contact bar 23 and fixed stabilizer bar 24 and the separation of mould lower surface on this contact bar 23, with this reciprocating, can make the mould lower surface carry out better being heated with the position of contact bar 23 and stabilizer bar 24 contact, and then make the whole of mould be heated more evenly, the performance such as intensity and hardness that the mould itself has been improved.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a mould heat treatment equipment, includes one side open-ended furnace body (1) and is used for furnace body (1) opening confined furnace gate (11), and furnace body (1) inner wall has set firmly a plurality of heating wires (12), its characterized in that: the furnace body is characterized in that a plurality of support rods (2) are fixedly arranged on the inner bottom wall of the furnace body (1), the top ends of the support rods (2) are hinged with levers (21), the hinge axis in the middle of the levers (21) is horizontally arranged, two ends of each lever (21) are hinged with connecting rods (22) which are oppositely arranged, and the top ends of the connecting rods (22) are fixedly provided with contact rods (23) for horizontally supporting a mold; the inner bottom wall of the furnace body (1) is provided with a plurality of guide assemblies (4) for the connecting rods (22) to vertically lift, and the inner bottom wall of the furnace body (1) is provided with a driving mechanism (3) for simultaneously driving all the levers (21) to synchronously rotate along the hinged axes of the middle parts of the levers.

2. The mold heat treatment apparatus according to claim 1, wherein: the stabilizer bars (24) are horizontally arranged at two ends of the contact rod (23) and are distributed in a staggered manner on the oppositely arranged stabilizer bars (24) on the contact rod (23).

3. The mold heat treatment apparatus according to claim 1, wherein: the furnace body is characterized in that the driving mechanism (3) comprises a reciprocating motor (31), a rotating shaft (32), a plurality of cams (33), a plurality of rockers (34) and a plurality of sliding sleeves (35), a plurality of accommodating grooves (16) are formed in the inner bottom wall of the furnace body (1), the cams (33) rotate in the accommodating grooves (16), the rotating shaft (32) is parallel to a hinge axis in the middle of the levers (21), all the levers (21) are parallel to each other and distributed along the same straight line, all the cams (33) are fixedly sleeved on the same rotating shaft (32), one end of the rotating shaft (32) extends out of the furnace body (1) and is fixed with the reciprocating motor (31), and the reciprocating motor (31) is fixed on the outer; the bottom end of the rocker (34) extends into the accommodating groove (16) and is rotatably connected to the end face of the cam (33) at a position far away from the rotating shaft (32), the top end of the rocker (34) is hinged with the sliding sleeve (35), the sliding sleeve (35) is sleeved on the lever (21) in a sliding manner, and the hinged axes at the two ends of the rocker (34) are parallel to the axis of the rotating shaft (32); when the sliding sleeve (35) slides to a position close to the hinged position of the middle part of the lever (21), the contact rod (23) above the lever (21) close to the sliding sleeve (35) is higher than the contact rod (23) far away from the sliding sleeve (35), and meanwhile, one end of the cam (33) far away from the rotating shaft (32) faces upwards.

4. A mold heat treatment apparatus as claimed in claim 3, wherein: one side that lever (21) circumference lateral wall is located the articulated department in middle part and is close to sliding sleeve (35), the one end that lever (21) circumference lateral wall is close to sliding sleeve (35) all fixes the cover and is equipped with limiting plate (211), and two limiting plate (211) are located the both sides that sliding sleeve (35) are relative respectively.

5. The mold heat treatment apparatus according to claim 1, wherein: the guide assembly (4) comprises a fixing column (41) and a vertically arranged guide sleeve (42), the fixing column (41) is fixed at the position, located on one side of the connecting rod (22), of the bottom wall of the furnace body (1), the fixing column (41) is fixed with the guide sleeve (42), and the connecting rod (22) penetrates through the guide sleeve (42).

6. The mold heat treatment apparatus according to claim 1, wherein: the subaerial track (5) that are parallel to each other that have set firmly of furnace body (1) opening one side, all tracks (5) slide and be connected with same coaster (51), and one side that coaster (51) are close to furnace body (1) has set firmly picture peg (52) that a plurality of levels set up, and the level of picture peg (52) is less than the highest height that contact lever (23) rose.

7. The mold heat treatment apparatus according to claim 6, wherein: the bottom end of the pulley (51) is rotatably connected with a plurality of pulleys (53), each track (5) is provided with at least two pulleys (53), the circumferential side wall of each pulley (53) is provided with a circular groove (531), and each track (5) is located in each groove (531).

8. The mold heat treatment apparatus according to claim 1, wherein: furnace gate (11) and the lateral wall of furnace body (1) laminating vertically have set firmly a plurality of dovetail (13), and a plurality of dovetail (14) have been seted up to the lateral wall of furnace body (1) and furnace gate (11) laminating, and dovetail (13) vertically slides in dovetail (14), and furnace body (1) top is equipped with and is used for driving furnace gate (11) to go up and down with elevating system (6) of switching fire door.

9. The mold heat treatment apparatus according to claim 8, wherein: elevating system (6) are including support frame (61), back shaft (62), reel (63) and lifting rope (64), support frame (61) are total two and fix respectively in the position that furnace body (1) relative lateral wall is close to furnace gate (11), the top of support frame (61) is higher than furnace body (1) outer roof, back shaft (62) horizontal rotation connects between two support frames (61), reel (63) have a plurality ofly and all fixed the cover establish on back shaft (62), all fixed with a lifting rope (64) on every reel (63), lifting rope (64) keep away from the bottom and furnace gate (11) fixed surface of reel (63).

10. A mold heat treatment apparatus as claimed in claim 9, wherein: one end of the supporting shaft (62) is coaxially and fixedly provided with a large gear (72), the outer top wall of the furnace body (1) is fixedly provided with a lifting motor (7), the lifting motor (7) is coaxially and fixedly provided with a small gear (71), the small gear (71) is parallel to the large gear (72), and the small gear (71) is connected with the large gear (72) through a chain.