CN115255330A - Passive lower ejector for metal low-pressure die - Google Patents

Abstract

The invention relates to the technical field of mold ejection structures, in particular to a passive downward ejection device of a metal type low-pressure mold. The upper die and the lower die are correspondingly arranged up and down, the front side and the rear side of the upper die are respectively connected with an upper stripper plate through a connecting piece in a detachable mode, one side of the lower end of the upper stripper plate is provided with a horizontally convex hooking nozzle, the front side and the rear side of the lower die are respectively provided with a lower stripper plate, one side of the upper end of the lower stripper plate is provided with a concave hooking groove, the hooking nozzle can stretch into the hooking groove and the hooking groove to be engaged up and down, and the upper stripper plate can drive the lower stripper plate to move upwards together through the hooking nozzle in an engaged state. According to the invention, an active ejection mechanism is not required to be arranged below the lower die, but the metal low-pressure die casting is ejected downwards by virtue of the upper and lower stripper plates which are meshed up and down through the driving force provided by the die opening driving mechanism, so that parts with heavy weight are left on the upper die.

Description

Passive Bottom Ejection Device for Metal Type Low Pressure Mold

technical field

The invention relates to the technical field of mold ejection structures, in particular to a passive lower ejection device for metal-type low-pressure molds.

Background technique

When the metal type low-pressure mold is in production, the holding furnace of the low-pressure equipment is directly below the mold body, and the active lower ejection system cannot be arranged under the lower mold.

In the prior art, the molded castings in metal-type low-pressure molds generally rely on the wrapping force of the upper mold to pull the castings out of the lower mold and stay in the upper mold, and then the castings are ejected by the ejection mechanism arranged above the upper mold , to achieve demoulding. In this process, in order to pull out the casting from the lower mold and stay in the upper mold, the wrapping force of the upper mold on the casting is greater than the sum of the wrapping force of the lower mold on the casting and the gravity of the product itself, which leads to the The design requirements are higher and more complex. Especially when the wrapping force of the lower mold on the casting is particularly large, in order to ensure that the casting can stay in the upper mold during the process of being released from the lower mold, it is necessary to add more designs to the upper mold to improve the impact of the upper mold on the casting. wrapping power.

Contents of the invention

The present application aims at the shortcomings in the above-mentioned existing production technology, and provides a passive lower ejection device for a metal-type low-pressure mold with a reasonable structure, which can eject the casting from the lower mold of the low-pressure mold through the driving part arranged above the upper mold , the wrapping force of the low-pressure mold only needs to be greater than the weight of the casting itself, which simplifies the structural design of the upper mold of the low-pressure mold.

The technical scheme adopted in the present invention is as follows:

The passive lower ejection device of the metal type low-pressure mold includes an upper mold and a lower mold correspondingly arranged up and down. For the hook mouth, the lower stripping plate is set on the front and rear sides of the lower mold, and the upper side of the lower stripping plate is provided with a concave occlusal groove. The lower ejection plate can be driven to move upwards together by the hook mouth; the lower end of the lower ejection plate is detachably connected to the side of the lower ejection plate through a connector, the upper surface of the lower ejection plate is fixed on the lower ejection rod mounting plate, and the lower ejection rod is installed A plurality of lower ejector rods are fixed on the upper surface of the plate, and the upper ends of the plurality of lower ejector rods pass upwardly through the end face of the cavity of the lower die, and the plurality of lower ejector rods can eject the casting in the end face of the die cavity of the lower die.

Further, guide grooves are arranged along the height direction on the lower stripping plate, guide posts are arranged in the guide grooves, and one end of the guide posts is screwed to the side of the lower die.

Further, the guide groove includes a first guide groove segment and a second guide groove segment arranged up and down, the first guide groove segment and the second guide groove segment are staggered in the horizontal direction, and the first guide groove segment and the second guide groove segment The sections are connected into one body through the disengagement groove section, the guide post can slide up and down in the first guide groove section and the second guide groove section, and the guide post reaches the second guide groove from the first guide groove section through the disengagement groove section Horizontal movement can occur during the period.

Further, the upper groove surface of the occlusal groove is a straight groove end surface arranged horizontally, and the hook mouth protruding into the occlusal groove can be in contact with the end surface of the straight groove up and down. The stripping plate moves upwards, and the lower groove surface of the engaging groove is the end surface of the chute arranged obliquely.

Further, the lower end of the lower die is fixed on the lower die mounting plate, the upper end of the upper die is connected to the upper die mounting plate through a plurality of buffer rods, the upper ends of the plurality of buffer rods are fixedly connected to the upper die mounting plate, and the lower ends of the plurality of buffer rods are slidably connected to the upper die mounting plate. In the buffer hole of the mold, a plurality of upper ejector rods are arranged on the lower end surface of the upper mold mounting plate.

Further, buffer springs are respectively set on the plurality of buffer rods, the upper ends of the buffer springs contact the lower end surface of the mounting plate of the upper die, and the lower ends of the buffer springs contact the upper end face of the upper die.

The beneficial effects of the present invention are as follows:

The present invention does not need to set an active ejection mechanism under the lower mold, but uses the driving force provided by the mold opening driving mechanism, and realizes the lower ejection of the metal low-pressure mold casting with the help of the upper and lower stripping plates engaged up and down, so that the heavy parts remain in the upper mold. It becomes possible; at the same time, it avoids the enlarging force of the lower mold due to the uneven temperature of the mold when the low-pressure mold starts production or resumes production after interruption, which makes the casting leave the mold, and eventually the mold needs to be removed from the machine to clean the casting However, the problem of interruption occurs; the mutual cooperation of the guide groove and the guide column can also realize the automatic disengagement of the upper and lower stripping plates, which improves the work efficiency; because the casting is ejected through the lower ejector rod, the wrapping force of the upper mold cavity on the casting Only need to be greater than the gravity of the casting, the casting can be left in the upper mold, which simplifies the design of the upper mold.

Description of drawings

Fig. 1 is the front structural diagram of the present invention.

Figure 2 is an enlarged view of A in Figure 1 .

Fig. 3 is a back view of the present invention.

Figure 4 is a structural diagram of the lower stripping template.

Fig. 5 is a demoulding state diagram of the present invention.

Among them: 1. Upper mold; 2. Lower mold; 3. Upper stripping plate; 4. Lower stripping plate; 5. Guide post; 6. Lower ejector rod; 7. Lower ejector rod mounting plate; 8. Lower ejector Plate; 9, hook mouth; 10, occlusal groove; 11, guide groove; 12, first guide groove section; 13, second guide groove section; 14, disengagement groove section; 15, chute end face; 16, straight Groove end face; 17, upper die mounting plate; 18, lower die mounting plate; 19, upper ejector rod; 20, buffer rod; 21, buffer spring.

Detailed ways

The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

In the embodiment shown in Figure 1 and Figure 3, the passive lower ejection device of the metal type low-pressure mold includes an upper mold 1 and a lower mold 2 correspondingly arranged up and down, and the front and rear sides of the upper mold 1 are detachably connected by connecting pieces. Go up stripping template 3, the hook mouth 9 that horizontally protrudes is set on one side of going up stripping template 3 lower ends. The lower mold 2 is provided with a lower stripping plate 4 on the front and rear sides respectively, and a depressed occlusal groove 10 is arranged on one side of the upper end of the lower stripping plate 4. The hook mouth 9 can extend into the occlusal groove 10 and occlude the occlusal groove 10 up and down. In the occlusal state, the upper The stripping plate 3 can drive the lower stripping plate 4 to move upwards together through the hook mouth 9 .

In the embodiment shown in Figure 1 and Figure 2, the lower end of the lower stripping plate 4 is detachably connected to the side of the lower ejector plate 8 through a connector, the upper end of the lower ejector plate 8 is fixed to the lower ejector rod mounting plate 7, and the lower ejector A plurality of lower ejector rods 6 are fixed on the upper end surface of the rod mounting plate 7, and the upper ends of the plurality of lower ejector rods 6 pass upwardly through the cavity end face of the lower mold 2, and the plurality of lower ejector rods 6 can push the cavity of the lower mold 2 The casting in the end faces is ejected.

In order to allow the lower stripping plate 4 to move up and down according to the set direction, in the embodiment shown in Figure 2, a guide groove 11 is arranged along the height direction on the lower stripping plate 4, and a guide post 5 is arranged in the guide slot 11, and one end of the guide post 5 It is connected to the side of the lower die 2 by threads. The upper stripping plate 3 drives the lower stripping plate 4 to move upwards, and the lower stripping plate 4 drives a plurality of lower ejector rods 6 through the lower ejector plate 8 to eject the casting in the cavity end face of the lower mold 2 upwards. Wherein, the guide post 5 cooperates with the guide groove 11 to guide the upward movement of the lower stripping plate 4 .

In the embodiment shown in Figure 4, the guide groove 11 includes a first guide groove segment 12 and a second guide groove segment 13 arranged up and down, and the first guide groove segment 12 and the second guide groove segment 13 are staggered in the horizontal direction Set, the first guide groove section 12 and the second guide groove section 13 are connected into one body by disengaging the groove section 14, and the guide post 5 can slide up and down in the first guide groove section 12 and the second guide groove section 13, The guide post 5 can move in the horizontal direction when it reaches the second guide groove segment 13 from the first guide groove segment 12 through the release groove segment 14 .

In the embodiment shown in Figure 4, the upper groove surface of the engaging groove 10 is a straight groove end face 16 arranged horizontally, and the hook mouth 9 extending into the engaging groove 10 can be in contact with the straight groove end face 16 up and down, and the upper stripping plate 3 When driving the hook mouth 9 to go upward, it can drive the lower stripping template 4 that is in contact with it to move upward. The lower groove surface of the occlusal groove 10 is an inclined chute end surface 15 , and the hook mouth 9 can quickly and smoothly disengage from the occlusal groove 10 along the inclined chute end surface 15 .

In the embodiment shown in Figure 5, the lower end surface of the lower die 2 is fixed on the lower die mounting plate 18, the upper end face of the upper die 1 is connected to the upper die mounting plate 17 through a plurality of buffer rods 20, and the upper ends of the plurality of buffer rods 20 are fixedly connected to the upper die mounting plate 18. Die mounting plate 17, the lower ends of multiple buffer rods 20 are slidably connected in the buffer holes of upper die 1, buffer springs 21 are respectively set on multiple buffer rods 20, the upper ends of buffer springs 21 contact the lower end surface of upper die mounting plate 17, buffer springs 21 The lower end contacts the upper end surface of the upper die 1 . A plurality of upper ejector rods 19 are arranged on the lower end surface of the upper die mounting plate 17, and the upper ejector rods 19 can eject the casting in the upper die 1 downward.

The working principle of the present invention is: as shown in Figure 1, when the upper mold 1 and the lower mold 2 are in the mold-closed state, the hook mouth 9 of the upper stripping plate 3 and the occlusal groove 10 of the lower stripping plate 4 are engaged, and when the upper driving element Drive the mold to open for a moment, the upper ejector plate 3 will drive the lower ejector plate 4 to move upward through the hook mouth 9, the lower ejector plate 4 will drive the lower ejector plate 8 to move upward together, and the lower ejector plate 8 will drive multiple lower ejectors The ejector rods 6 move upward synchronously, and a plurality of lower ejector rods 6 synchronously eject the castings in the cavity of the lower mold 2 . During the upward movement of the lower stripping plate 4, the guide post 5 enters the disengagement slot section 14 from the second guide slot section 13 along the guide groove 11, and then enters the first guide slot section 12, between the guide slot 11 and the guide post 5 Under the guidance of the lower stripping plate 4, the upper part moves to the left while moving upwards, so that the occlusal groove 10 is gradually separated from the hook mouth 9, thereby realizing the disengagement of the upper stripping plate 3 and the lower stripping plate 4. At this time, multiple lower stripping plates The ejector rod 6 and the lower ejector plate 8 leave the bottom support of the casting, and the casting force of the cavity of the upper mold 1 only needs to be greater than the gravity of the casting to leave the casting in the cavity of the cavity of the upper mold 1. As shown in Figure 5, when the casting is taken out of the cavity of the upper mold 1, when the upper mold 1 is driven downward by the upper driving element, the cavity of the upper mold 1 contacts the lower ejector rod 6, and the cavity of the upper mold 1 drives the lower ejector The rod 6 and the lower ejector plate 8 move downward to reset. During the downward movement, the hook mouth 9 of the upper stripping plate 3 and the occlusal groove 10 of the lower stripping plate 4 engage, finally reaching the mold clamping state.

The present invention does not need to set an active ejection mechanism under the lower mold, but uses the driving force provided by the mold opening driving mechanism, and realizes the lower ejection of the metal low-pressure mold casting with the help of the upper and lower stripping plates engaged up and down, so that the heavy parts remain in the upper mold. became possible. At the same time, it avoids the uneven temperature of the mold when the low-pressure mold is in production or restarts production after interruption, which will cause the encapsulation force of the lower mold to become larger, leaving the mold in the casting, and eventually the mold needs to be removed from the machine to clean out the casting and cause interruption. problem occurs. During the lower ejection process, the automatic disengagement of the upper and lower stripping plates can also be realized through the setting of the guide groove and the guide post, which improves the work efficiency.

The above description is an explanation of the present invention, not a limitation of the invention. For the limited scope of the present invention, please refer to the claims. Within the protection scope of the present invention, any form of modification can be made.

Claims (6)

1. The utility model provides an ejecting device under metal type low pressure mould's passive form, corresponds last mould (1) and lower mould (2) that set up including from top to bottom, its characterized in that: the front side and the rear side of the upper die (1) are respectively detachably connected with the upper stripper plate (3) through connecting pieces, one side of the lower end of the upper stripper plate (3) is provided with a horizontally convex hook nozzle (9), the front side and the rear side of the lower die (2) are respectively provided with a lower stripper plate (4), one side of the upper end of the lower stripper plate (4) is provided with a concave occlusion groove (10), the hook nozzle (9) can extend into the occlusion groove (10) and be occluded with the occlusion groove (10) up and down, and in an occlusion state, the upper stripper plate (3) can drive the lower stripper plate (4) to move upwards together through the hook nozzle (9); the lower stripper plate (4) lower extreme passes through connecting piece detachable and connects ejector plate (8) side under, ejector rod mounting panel (7) under ejector plate (8) up end is fixed down, ejector rod (6) under a plurality of are fixed to ejector rod mounting panel (7) up end down, and the die cavity terminal surface of lower mould (2) is upwards passed to a plurality of ejector rod (6) upper ends down, and a plurality of ejector rod (6) down can be ejecting with the foundry goods in the die cavity terminal surface of lower mould (2).

2. The passive down-lift apparatus of a metal-type low-pressure mold as claimed in claim 1, wherein: a guide groove (11) is formed in the lower demolding plate (4) in the height direction, a guide pillar (5) is arranged in the guide groove (11), and one end of the guide pillar (5) is connected to the side face of the lower mold (2) through threads.

3. The passive down-lift apparatus of a metal-type low-pressure mold as claimed in claim 2, wherein: the guide groove (11) comprises a first guide groove section (12) and a second guide groove section (13) which are arranged up and down, the first guide groove section (12) and the second guide groove section (13) are arranged in a staggered mode in the horizontal direction, the first guide groove section (12) and the second guide groove section (13) are connected into a whole through a disengagement groove section (14), the guide pillar (5) can slide up and down in the first guide groove section (12) and the second guide groove section (13), and the guide pillar (5) can move in the horizontal direction when reaching the second guide groove section (13) from the first guide groove section (12) through the disengagement groove section (14).

4. The passive downward ejection device for the metal type low-pressure die as claimed in any one of claims 1 to 3, wherein: the last trough surface of interlock groove (10) is straight groove terminal surface (16) that the level set up, and colluding mouth (9) that stretches into in interlock groove (10) can contact from top to bottom with straight groove terminal surface (16), goes up stripper plate (3) and drives when colluding mouth (9) and go upward, can drive lower stripper plate (4) the upward movement of contact with it, and the lower trough surface of interlock groove (10) is chute terminal surface (15) that the slope set up.

5. The passive down-lift apparatus of a metal-type low pressure mold of claim 4, wherein: lower terminal surface fixes on lower mould mounting panel (18) under lower mould (2), goes up mould (1) up end and connects mould mounting panel (17) through a plurality of buffer rods (20), and mould mounting panel (17) are gone up to a plurality of buffer rod (20) upper end fixed connection, and a plurality of buffer rod (20) lower extreme sliding connection sets up a plurality of ejector pins (19) of going up in the buffering hole of last mould (1) under mould mounting panel (17).

6. The passive down-ejection apparatus for a metal-type low-pressure mold according to claim 5, wherein: buffer springs (21) are sleeved on the buffer rods (20) respectively, the upper ends of the buffer springs (21) are in contact with the lower end face of the upper die mounting plate (17), and the lower ends of the buffer springs (21) are in contact with the upper end face of the upper die (1).

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