Secondary turning core pulling mechanism of metal mold slider

Abstract

The invention relates to a secondary steering core-pulling mechanism for a slider of a metal mold, and belongs to the technical field of mold core-pulling. The mechanism comprises an inner slider, an inclined guide slider, a fixed mold, an oil cylinder, a slider seat and a movable mold, wherein the inner slider is an inner hole core, cooperates with the slider seat, is fixed on the slider seat and can move back and forth. The inclined guide slider is fixed on the fixed mold and can move the slider seat in a straight line. The slider seat drives the inner slider to perform core-pulling movement, and at the same time, the inner slider performs oblique movement along the slider seat to complete secondary steering. The fixed mold is the fixed mold part of the mold and the main structure of the mold. The oil cylinder is fixed on a supporting plate and drives the iron core to move forward and backward during operation. The iron core is connected to the movable mold, the movable mold moves to a certain position, and the casting is ejected from the ejector plate. The invention solves the problem of undercut during demoulding when the product structure buckle slider is undercut during demoulding, when the position space is limited and the inclined ejection angle is large.

Description

Technical Field

[0001] The invention belongs to the technical field of mold core pulling, and in particular relates to a secondary turning core pulling mechanism for a metal mold slide block. Background Art

[0002] Traditional metal molds generally use a single slider one-time core pulling mechanism, which has a large inner hole clamping force and is difficult to demold. The process is relatively backward, and the product is easy to deform and crack during demolding. In metal molds, some finished products have undercuts in the mold opening direction, and a slanted top structure is usually used on the slider. However, if the angle in the demolding direction of the slanted top is large, the conventional slanted top or slider structure cannot solve the large inclination undercut, and solve the problem of large slanted top angle. The conventional slanted top is about 10 degrees and occupies a large space. The commonly used slider structure cannot be realized, which is not conducive to production and reduces the service life of the mold. In addition, conventional core pulling often requires the cooperation of the slider and the cylinder, but many molds have a large clamping force and a long core pulling distance. Especially at the moment of mold opening, the slider has a greater clamping force, which makes it difficult to complete the mold opening. If the mold is opened forcibly, the slider, slider seat and cylinder may be damaged, which not only affects production efficiency, but also shortens the service life of the mold. The oil cylinder cannot move normally or even gets stuck, which causes the entire mold to be unable to produce normally, and in serious cases, the product will be damaged. In summary, a secondary steering core-pulling mechanism for the metal mold slider is designed to perfectly solve the above problems. Summary of the invention

[0003] The present invention overcomes the shortcomings of the prior art and proposes a secondary turning core pulling mechanism for a metal mold slider; it solves the problem of undercuts when the product structure buckle slider is demolded when there is undercut when the position space is limited and the inclined top angle is large.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0005] The metal mold slider secondary steering core pulling mechanism comprises a bottom plate, a fixed mold and a support frame are respectively arranged at both ends of the upper end surface of the bottom plate, a movable mold is slidably connected between the fixed mold and the support frame, a movable mold iron core is slidably connected inside the movable mold, a fixed mold iron core is fixed inside the fixed mold, the movable mold is fixed on the movable mold fixing frame, an oil cylinder is fixed on the support frame, the end of the telescopic rod of the oil cylinder is connected to the movable mold iron core through the movable mold iron core moving part, a vertical fixed plate is fixedly arranged at one end of the support frame close to the fixed mold through a fixed rod, and a vertical top plate is arranged at one end of the movable mold fixing frame away from the fixed mold, and the top plate A horizontal ejector rod is provided and inserted into the ejector rod through-holes on the movable mold and the movable mold fixing frame. The telescopic rod of the oil cylinder passes through the through-holes at the center of the fixed plate and the ejector plate in turn. An inclined groove is provided on one side of the movable mold. A triangular slider seat is slidably connected inside the inclined groove. A dovetail groove is provided at the end surface where the slider seat and the inclined groove cooperate. An inner sliding block is inserted into the movable mold. The dovetail block fixed at the outer end of the inner sliding block is slidably connected in the dovetail groove of the slider seat. The slider seat is slidably connected to the end surface of the movable mold fixing frame. The outer end surface of the slider seat is slidably connected to the inclined guide slider, and the inclined guide slider is fixed on the fixed mold.

[0006] Furthermore, two horizontal guide rods are fixedly arranged between the support frame and the fixed mold, and the two guide rods are respectively kept perpendicular to the support frame and the fixed mold. Horizontal guide holes are arranged at the left and right ends of the movable mold fixing frame, and the two guide rods are respectively inserted into the two guide holes. The movable mold fixing frame is slidably connected between the fixed mold and the support frame along the axis of the guide rods.

[0007] Furthermore, the movable mold core is a stepped cylindrical structure, the end close to the fixed mold is a large diameter section, the end away from the fixed mold is a small diameter section, and an internal threaded hole is arranged on the end face of the small diameter section; the movable mold core connecting piece is a two-section stepped shaft structure, the small diameter section is screwed into the internal threaded hole of the movable mold core, and the end face of the large diameter section is in contact with the end face of the small diameter section of the fixed mold; the outer diameter of the large diameter section of the movable mold core connecting piece is larger than the outer diameter of the small diameter section of the fixed mold.

[0008] Furthermore, the movable mold fixing frame is provided with mutually interpenetrating movable holes, and the movable holes are composed of two sections of holes with different diameters, namely a limiting hole and a through hole. The limiting hole is close to one end of the fixed mold and has a larger diameter, and the through hole is far away from one end of the fixed mold and has a smaller diameter; the large diameter section of the movable mold iron core is located inside the limiting hole of the movable mold fixing frame, and the small diameter section of the movable mold iron core is located inside the through hole of the movable mold fixing frame; the outer diameters of the large diameter section of the movable mold iron core and the large diameter section of the movable mold iron core connecting piece are both larger than the inner diameter of the through hole of the movable mold fixing frame.

[0009] Furthermore, the length of the large diameter section of the movable mold core is smaller than the length of the limiting hole of the movable mold fixing frame; the length of the small diameter section of the movable mold core is larger than the length of the through hole of the movable mold fixing frame.

[0010] Furthermore, two horizontal connecting rods are fixedly arranged on the end surface of one end of the top plate close to the movable mold, and an anti-slip column is fixedly arranged on the end of the connecting rod away from the top plate, the anti-slip column is coaxially arranged with the connecting rod and the outer diameter of the anti-slip column is larger than the outer diameter of the connecting rod; two connecting rod through holes are correspondingly arranged on the movable mold fixing frame and the movable mold, the connecting rod through holes are connected with the parting surface of the movable mold and the fixed mold, and the two connecting rods are respectively inserted into the two connecting rod through holes; the connecting rod through hole is provided with an anti-slip column groove at the parting surface of the movable mold and the fixed mold, the inner diameter of the anti-slip column groove is larger than the outer diameter of the anti-slip column, the depth of the anti-slip column groove is equal to the length of the anti-slip column, and the anti-slip column is located inside the anti-slip column groove.

[0011] Furthermore, the movable mold core is provided with a groove at one end connected to the fixed mold core, and the fixed mold core is provided with a protrusion at one end connected to the movable mold core, and the protrusion of the fixed mold core is inserted into the groove of the movable mold core.

[0012] Furthermore, the inclined groove is connected to the front and rear end surfaces of the movable mold, and the end of the inclined groove close to the fixed mold is further outward than the end of the inclined groove close to the movable mold fixing frame; the horizontal cross-section of the slider seat is a triangular structure, and the slider seat slides in the inclined groove along the extension direction of the inclined groove.

[0013] Furthermore, the movable mold is provided with a slider through hole between the inclined groove and the inside of the cavity, and the angle between the axis of the slider through hole and the bottom surface of the inclined groove is 95°; an inner slider is inserted into the slider through hole, and the inner slider is an inner hole core, which is a cylindrical structure as a whole, and its inner end extends into the cavity of the movable mold and the fixed mold, and a dovetail block is fixed at its outer end, and the dovetail block is parallel to the inclined groove; a horizontal dovetail groove is provided on the end face of the slider seat that is inserted into the inclined groove, and the dovetail block on the inner slider is slidably connected in the dovetail groove on the slider seat.

[0014] Furthermore, a horizontal dovetail groove is provided on the outer end surface of the slider seat, and an inclined guide slider is slidably connected through the dovetail groove, and a horizontal dovetail block on the inclined guide slider is slidably connected to the dovetail groove of the slider seat, and a connecting rod is fixedly provided on the end surface of the inclined guide slider close to the fixed mold, and the end of the connecting rod away from the inclined guide slider is fixedly connected to the fixed mold fixing frame. The connecting rod is parallel to the guide rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the demoulding is smooth, deformation and cracking will not occur, the product qualification rate is significantly increased by 20%, the efficiency is increased by 20%, and the production cost is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a three-dimensional schematic diagram of the present invention as a whole Figure 1 ;

[0018] Figure 2 It is a three-dimensional schematic diagram of the present invention as a whole Figure 2 ;

[0019] Figure 3 is a top view of the present invention as a whole;

[0020] Figure 4 It is a front view of the present invention as a whole;

[0021] Figure 5 yes Figure 3 AA section view in;

[0022] Figure 6 yes Figure 3 BB section view in;

[0023] Figure 7 yes Figure 3 CC section view in;

[0024] Figure 8 yes Figure 4 DD section view in;

[0025] Fig. 9 It is a three-dimensional schematic diagram of the connection between the fixed mold and the movable mold;

[0026] Fig.10 It is a top view of the connection between the fixed mold and the movable mold;

[0027] Fig.11 It is the front view of the connection between the fixed mold and the movable mold;

[0028] Fig.12 yes Fig.10 FF section view in;

[0029] Fig.13 yes Fig.11 EE cross-sectional view in;

[0030] Fig.14 It is a cross-sectional view of the connection between the movable mold core and the movable mold core moving part;

[0031] Fig.15 It is a three-dimensional schematic diagram of the moving mold;

[0032] Fig.16 It is a three-dimensional schematic diagram of the fixed mold;

[0033] Among them, 1 is the bottom plate, 2 is the fixed mold, 3 is the fixed mold fixing frame, 4 is the support frame, 5 is the movable mold, 6 is the movable mold fixing frame, 7 is the guide rod, 8 is the oil cylinder, 9 is the fixed plate, 10 is the top plate, 11 is the slider seat, 12 is the inclined guide slider, 13 is the movable mold core, 14 is the movable mold core moving part, 15 is the fixed mold core, 16 is the limiting hole, 17 is the through hole, 18 is the ejector rod, 19 is the connecting rod, 20 is the anti-slip column, 21 is the inner slider, 22 is the cavity, 23 is the ejector rod through hole, 24 is the anti-slip column groove, 25 is the pouring channel, and 26 is the pouring gate. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0035] like Figure 1 As shown in FIG. 16 , the present invention provides a secondary turning core pulling mechanism for a metal mold slider, comprising a horizontally arranged bottom plate 1, on which a vertically arranged fixed mold 2 and a movable mold 5 are arranged. The fixed mold 2 is fixedly arranged at one end of the upper end surface of the bottom plate 1 along the length direction, and a vertical support frame 4 is fixedly arranged at the other end of the upper end surface of the bottom plate 1 along the length direction. The support frame 4 and the fixed mold 2 are respectively located at the two ends of the upper end surface of the bottom plate 1, and the movable mold 5 is arranged between the fixed mold 2 and the support frame 4.

[0036] Two horizontal guide rods 7 are fixedly arranged between the support frame 4 and the fixed mold 2. The two guide rods 7 are respectively fixedly arranged at the two ends of the support frame 4 and the fixed mold 2 and are parallel to each other. The two guide rods 7 are respectively kept perpendicular to the support frame 4 and the fixed mold 2.

[0037] The fixed mold 2 is fixedly arranged on one end of the upper end surface of the bottom plate 1 through the fixed mold fixing frame 3 . The fixed mold 2 is fixedly connected to the fixed mold fixing frame 3 . The fixed mold 2 is located at one end of the fixed mold fixing frame 3 close to the movable mold 5 .

[0038] The movable mold 5 is fixed on a vertical movable mold fixing frame 6, and the movable mold fixing frame 6 is located at one end of the movable mold 5 away from the fixed mold 2. Horizontal guide holes are arranged at the left and right ends of the movable mold fixing frame 6, and two guide rods 7 are respectively inserted into the two guide holes. The movable mold fixing frame 6 is slidably connected between the fixed mold 2 and the support frame 4 along the axis of the guide rods 7.

[0039] When the movable mold 5 slides to contact the fixed mold 2, the movable mold 5 and the fixed mold 2 are closed, and the blank can be injected into the mold cavity 22 between the movable mold 5 and the fixed mold 2 for casting and molding; then when the movable mold 5 moves in the direction away from the fixed mold 2, the fixed mold 2 and the movable mold 5 are separated from each other, and the casting that has been formed in the mold cavity 22 can be taken out.

[0040] A horizontal movable mold core 13 is inserted into the movable mold fixing frame 6, and a movable mold core moving part 14 is provided at the rear end of the movable mold core 13. The movable mold core moving part 14 can drive the movable mold core 13 to slide and connect inside the movable mold fixing frame 6 along the direction of the guide rod 7.

[0041] The movable mold core 13 is a stepped cylindrical structure, with a large diameter section at one end close to the fixed mold 2 and a small diameter section at one end away from the fixed mold 2. An internal threaded hole is arranged on the end surface of the small diameter section. The movable mold core 13 connector is a two-stage stepped shaft structure, with the small diameter section being screwed into the internal threaded hole of the movable mold core 13, and the end surface of the large diameter section being in contact with the end surface of the small diameter section of the fixed mold 2. The outer diameter of the large diameter section of the movable mold core 13 connector is larger than the outer diameter of the small diameter section of the fixed mold 2.

[0042] The movable mold fixing frame 6 is provided with mutually interpenetrating movable holes inside, and the axis of the movable hole is parallel to the axis of the guide rod 7. The movable hole is composed of two sections of holes with different diameters, namely, a limiting hole 16 and a through hole 17. The limiting hole 16 is close to one end of the fixed mold 2 and has a larger diameter, and the through hole 17 is far away from one end of the fixed mold 2 and has a smaller diameter. The large diameter section of the movable mold core 13 is located inside the limiting hole 16 of the movable mold fixing frame 6, and the small diameter section of the movable mold core 13 is located inside the through hole 17 of the movable mold fixing frame 6. The outer diameter of the large diameter section of the movable mold core 13 and the large diameter section of the movable mold core 13 connector are both larger than the inner diameter of the through hole 17 of the movable mold fixing frame 6, so that the large diameter section of the movable mold core 13 can be prevented from escaping from the movable mold fixing frame 6.

[0043] The length of the large diameter section of the movable mold core 13 is smaller than the length of the limiting hole 16 of the movable mold fixing frame 6 ; the length of the small diameter section of the movable mold core 13 is larger than the length of the through hole 17 of the movable mold fixing frame 6 .

[0044] The movable mold 5 is provided with a through hole, which corresponds to the limiting hole 16 of the movable mold fixing frame 6, and the inner diameter of the through hole is equal to the inner diameter of the limiting hole 16 of the movable mold fixing frame 6. The large diameter section of the movable mold core 13 extends into the through hole of the movable mold 5, and finally extends into the cavity 22 of the fixed mold 2 and the movable mold 5.

[0045] A horizontal oil cylinder 8 is fixedly arranged on the end surface of the support frame 4 away from the fixed mold 2, and one end of the telescopic rod of the oil cylinder 8 is horizontally facing one end of the fixed mold 2, and the end of the telescopic rod of the oil cylinder 8 is fixedly connected to the end of the movable mold core moving member 14 away from the movable mold core 13. The oil cylinder 8 drives the movable mold core 13 to achieve horizontal reciprocating movement by telescoping.

[0046] A vertical fixing plate 9 is fixedly arranged on the end surface of the support frame 4 close to the fixed mold 2 through three horizontal fixing rods. A through hole that passes through the center of the fixing plate 9 is arranged. The telescopic rod of the oil cylinder 8 passes through the through hole on the fixing plate 9.

[0047] A vertical top plate 10 is arranged between the fixed plate 9 and the movable mold 5 . A through hole that passes through the top plate 10 is arranged at the center of the top plate 10 . The telescopic rod of the oil cylinder 8 passes through the through hole on the top plate 10 .

[0048] The inner diameter of the through hole at the center of the fixed plate 9 and the top plate 10 is larger than the outer diameter of the large diameter section of the connecting piece of the movable mold core 13.

[0049] Four horizontal ejector rods 18 are fixedly provided on the end surface of the ejector plate 10 close to the movable mold 5. Four ejector rod through holes 23 are correspondingly provided on the movable mold fixing frame 6 and the movable mold 5. The ejector rod through holes 23 are connected to the inner wall of the cavity 22 of the movable mold 5. The four ejector rods 18 are respectively inserted into the four ejector rod through holes 23.

[0050] Two horizontal connecting rods 19 are fixedly arranged on the end surface of one end of the top plate 10 close to the movable mold 5, and an anti-slip column 20 is fixedly arranged on the end of the connecting rod 19 away from the top plate 10. The anti-slip column 20 is coaxially arranged with the connecting rod 19 and the outer diameter of the anti-slip column 20 is larger than the outer diameter of the connecting rod 19. Two connecting rod 19 through holes are correspondingly arranged on the movable mold fixing frame 6 and the movable mold 5. The connecting rod 19 through holes are connected to the parting surface of the movable mold 5 and the fixed mold 2, and the two connecting rods 19 are respectively inserted into the two connecting rod 19 through holes. The connecting rod 19 through hole is provided with an anti-slip column groove 24 at the parting surface of the movable mold 5 and the fixed mold 2. The inner diameter of the anti-slip column groove 24 is larger than the outer diameter of the anti-slip column 20, the depth of the anti-slip column groove 24 is equal to the length of the anti-slip column 20, and the anti-slip column 20 is located inside the anti-slip column groove 24.

[0051] The fixed mold 2 and the fixed mold fixing frame 3 are both provided with through holes that penetrate front and back. The fixed mold iron core 15 is inserted into the through holes in the fixed mold fixing frame 3 and the fixed mold 2 from the outside of the fixed mold fixing frame 3 in sequence, and finally extends into the cavity 22 between the fixed mold 2 and the movable mold 5.

[0052] The movable mold core 13 is provided with a groove at one end connected to the fixed mold core 15 , and the fixed mold core 15 is provided with a protrusion at one end connected to the movable mold core 13 . The protrusion of the fixed mold core 15 is inserted into the groove of the movable mold core 13 .

[0053] A horizontal inclined groove is provided on one end surface of the movable mold 5, and the inclined groove is connected with the front and rear end surfaces of the movable mold 5, and the end of the inclined groove close to the fixed mold 2 is further outward than the end of the inclined groove close to the movable mold fixing frame 6. A slider seat 11 is inserted into the inclined groove, and the horizontal cross section of the slider seat 11 is a triangular structure, and the slider seat 11 can slide in the inclined groove along the extension direction of the inclined groove.

[0054] The movable mold 5 is provided with a slider hole between the inclined groove and the inside of the cavity 22, and the angle between the axis of the slider hole and the bottom surface of the inclined groove is 95°. An inner slider 21 is inserted into the slider hole, and the inner slider 21 is an inner hole core, which is a cylindrical structure as a whole. Its inner end extends into the cavity 22 of the movable mold 5 and the fixed mold 2, and a dovetail block is fixedly provided at its outer end, and the dovetail block is parallel to the inclined groove.

[0055] A horizontal dovetail groove is arranged on the end surface of the slider seat 11 which is plugged into the inclined groove, and the dovetail block on the inner slider 21 is slidably connected in the dovetail groove on the slider seat 11 .

[0056] The slider seat 11 is provided with a horizontal dovetail block on the end face in contact with the movable mold fixing frame 6, and the end face of the movable mold fixing frame 6 opposite to the sliding seat is provided with a horizontal dovetail groove, and the dovetail block on the slider seat 11 is slidably connected in the dovetail groove on the movable mold fixing frame 6.

[0057] A horizontal dovetail groove is arranged on the remaining outer end face of the slider seat 11, and an inclined guide slider 12 is slidably connected through the dovetail groove. The horizontal dovetail block on the inclined guide slider 12 is slidably connected to the dovetail groove of the slider seat 11. A connecting rod is fixedly arranged on the end face of the inclined guide slider 12 close to the fixed mold 2, and the end of the connecting rod away from the inclined guide slider 12 is fixedly connected to the fixed mold fixing frame 3. The connecting rod is parallel to the guide rod 7.

[0058] The contact angle between the slider seat 11 and the inclined guide slider can generally be selected between 10° and 30°. This mechanism adopts 25°, which has a relatively small friction resistance.

[0059] The inclined guide slide block 12 does not serve as a power source to push the slide block seat 11 to move. Instead, it is fixed to the fixed mold 2 and reacts to the movement of the slide block seat 11, thus saving a set of oil cylinder devices. The inclined guide slide block 12 not only plays the role of core pulling, but also achieves the purpose of wedging. It can be designed outside the mold, saving space compared to the inclined guide column structure.

[0060] Two pouring channels 25 are provided on the upper end of the parting surface between the fixed mold 2 and the movable mold 5. The two pouring channels 25 are connected to the interior of the cavity 22. The two pouring channels 25 are respectively provided with a pouring gate 26 at the upper end of the fixed mold 2 and the movable mold 5. Casting and molding are performed into the cavity 22 between the fixed mold 2 and the movable mold 5 through the pouring gate 26 and the pouring channel 25.

[0061] The working principle of the present invention is:

[0062] When pouring is required, the oil cylinder 8 is in the extended state, the movable mold 5 is in contact with the fixed mold 2, the protrusion of the fixed mold core 15 is located inside the groove of the movable mold core 13, and the inner slide 21 extends into the mold cavity 22, so that a complete pouring mold cavity 22 is formed, and pouring and molding can be performed inside the mold cavity 22 through the pouring port 26. At this time, the ends of the four ejector rods 18 overlap with the inner wall of the mold cavity 22, and the end of the anti-slip column 20 of the connecting rod 19 contacts the parting surface of the fixed mold 2.

[0063] When the casting is completely formed, the oil cylinder 8 is started to shrink. First, the telescopic rod of the oil cylinder 8 drives the movable mold core 13 to move backward for a distance through the movable mold core moving member 14, so that the movable mold core 13 is separated from the casting, until the end face of the large diameter section of the movable mold core 13 contacts the end face of the limiting hole 16 of the movable mold fixing frame 6, and then the movable mold core 13 drives the movable mold fixing frame 6 to move backward together.

[0064] Since the movable mold fixing frame 6 is transitionally connected to the movable mold 5 through the slider seat 11 and the inner slider 21, and the inner end of the inner slider 21 is inserted into the casting, the movable mold 5, the casting, the slider seat 11, and the inclined guide slider 12 move together with the movable mold iron core 13, so that the casting is separated from the fixed mold 2 and the parting action is completed. The slider seat 11 slides outward relative to the movable mold fixing frame 6 and slides toward one end of the oil cylinder 8 relative to the inclined guide slider 12.

[0065] When the casting is 25mm away from the fixed mold, the inclined guide slider 12 reaches the time-delay limit point. At this time, the inclined guide slider 12 is stationary, forcing the slider seat 11 to slide outward along the dovetail groove of the inclined guide slider 12, and then the slider seat 11 pulls the inner slider 21 out to complete the long-distance core pulling. During operation, the movable mold 5 and the slider seat 11 are driven to move forward and backward through the movable mold core 13, and the slider seat 11 moves linearly along the chute of the inclined guide slider 12. The slider seat 11 drags the inner slider 21 to move along the core pulling direction, and the inner slider 21 moves obliquely in the chute of the slider seat 11 to complete the secondary steering.

[0066] When the movable mold 5 is moved by the movable mold core moving part 14, the end of the push rod 18 on the top plate 10 contacts the casting. Due to the force applied by the casting to the push rod 18, the casting drives the push rod 18 and the top plate 10 to move together, so that the top plate 10 moves with the movable mold 5.

[0067] When the top plate 10 moves to contact the fixed plate 9, the fixed plate 9 restricts the top plate 10 from moving further. The telescopic rod of the oil cylinder 8 continues to contract, driving the movable mold fixing frame 6 and the movable mold 5 to continue to move toward the fixed plate 9, so that the distance between the movable mold fixing frame 6 and the top plate 10 gradually decreases, and the ejector rod 18 gradually extends out of the ejector rod through hole 23, thereby ejecting the casting from the movable mold 5.

[0068] At this point, the core pulling and parting actions are all completed.

[0069] The inner slider 21 is subjected to two opposite forces, one is the impact pressure of the metal liquid during the filling process, and the other is the core pulling force to overcome the clamping force during the core pulling process; the open core has a small cross-sectional area, a large core pulling distance, and a large core pulling resistance; the inclined guide slider 12 is designed on the outside of the mold, with a simple and compact structure, reliable operation, and convenient manufacturing. The mold uses a hydraulic cylinder 8 for parting and core pulling, which is prone to problems such as insufficient thrust of the cylinder 8 causing creeping, and the slider locking causing the system pressure to increase, thereby damaging the cylinder 8. Therefore, parting and core pulling are designed in a segmented and delayed combination.

[0070] After all the actions are completed, the telescopic rod of the oil cylinder 8 is extended again, and the large diameter section of the movable mold core moving part 14 drives the movable mold fixing frame 6 to move toward one end of the fixed mold 2. Since the top plate 10 is connected to the movable mold 5 by the connecting rod 19, the anti-detachment column 20 on the connecting rod 19 is connected to the anti-detachment column groove 24 on the movable mold 5, so that the top plate 10 is driven to move together through the connecting rod 19 until the end face of the anti-detachment column 20 of the connecting rod 19 contacts the parting surface of the fixed mold 2, and the top plate 10 stops moving, at which time the movable mold 5 contacts the parting surface of the fixed mold 2; and the movable mold core 13 continues to move until the movable mold core 13 contacts the fixed mold core 15, at which time the telescopic rod of the oil cylinder 8 stops extending. During the movement of the movable mold fixing frame 6, the slider seat 11 slides inward under the pressure of the inclined guide slider 12, thus forcing the dovetail block on the inner slider 21 to slide in the dovetail groove on the slider seat 11, so that the inner slider 21 re-extends into the cavity 22. At this point, the initial position is completely restored, the cavity 22 is completely restored, and pouring can continue.

[0071] The driving force of the oil cylinder is used as the driving force for mold opening and core pulling. If it acts at the same time, the driving force of the oil cylinder is superimposed, which is easy to damage the oil cylinder. There is a gap between the iron core and the movable mold and between the inclined guide slider and the fixed mold (the gap is 5mm). The iron core moves first, driving the movable mold to move. The inclined guide slider drives the slider seat and the inner slider to move. According to the time gradient, the oil cylinder can realize segmented force. When opening the mold, the fixed mold parting is completed first, and then the core pulling action is completed.

[0072] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. The secondary turning core pulling mechanism of the metal mold slider is characterized by: The invention comprises a bottom plate (1), wherein a fixed mold (2) and a support frame (4) are respectively arranged at both ends of the upper end surface of the bottom plate (1), a movable mold (5) is slidably connected between the fixed mold (2) and the support frame (4), a movable mold iron core (13) is slidably connected inside the movable mold (5), a fixed mold iron core (15) is fixedly arranged inside the fixed mold (2), the movable mold (5) is fixed on a movable mold fixing frame (6), an oil cylinder (8) is fixedly arranged on the support frame (4), an end of a telescopic rod of the oil cylinder (8) is connected to the movable mold iron core (13) through a movable mold iron core moving member (14), a vertical fixed plate (9) is fixedly arranged at one end of the support frame (4) close to the fixed mold (2) through a fixed rod, a vertical top plate (10) is arranged at one end of the movable mold fixing frame (6) away from the fixed mold (2), and the top plate (10) A horizontal push rod (18) is provided on the top and is inserted into the push rod through hole (23) on the movable mold (5) and the movable mold fixing frame (6). The telescopic rod of the oil cylinder (8) passes through the through holes at the center of the fixing plate (9) and the push rod (10) in sequence. An inclined groove is provided on one side of the movable mold (5). A triangular slider seat (11) is slidably connected inside the inclined groove. A dovetail groove is provided at the end surface of the slider seat (11) that matches the inclined groove. An inner sliding block is inserted inside the movable mold (5). The dovetail block fixed at the outer end of the inner sliding block is slidably connected in the dovetail groove of the slider seat (11). The slider seat (11) is slidably connected to the end surface of the movable mold fixing frame (6). The outer end surface of the slider seat (11) is slidably connected to the inclined guide slider (12). The inclined guide slider (12) is fixed on the fixed mold (2); The movable mold core (13) is a stepped cylindrical structure, the end close to the fixed mold (2) is a large diameter section, the end away from the fixed mold (2) is a small diameter section, and an internal thread hole is arranged on the end surface of the small diameter section; the movable mold core (13) connecting piece is a two-section stepped shaft structure, the small diameter section is screwed into the internal thread hole of the movable mold core (13), and the end surface of the large diameter section is in contact with the end surface of the small diameter section of the fixed mold (2); the outer diameter of the large diameter section of the movable mold core (13) connecting piece is larger than the outer diameter of the small diameter section of the fixed mold (2); The movable mold fixing frame (6) is provided with mutually interpenetrating movable holes inside, the movable holes are composed of two sections of holes with different diameters, namely, a limiting hole (16) and a through hole (17), the limiting hole (16) being close to one end of the fixed mold (2) and having a larger diameter, and the through hole (17) being far from one end of the fixed mold (2) and having a smaller diameter; the large diameter section of the movable mold iron core (13) is located inside the limiting hole (16) of the movable mold fixing frame (6), and the small diameter section of the movable mold iron core (13) is located inside the through hole (17) of the movable mold fixing frame (6); the outer diameters of the large diameter section of the movable mold iron core (13) and the large diameter section of the movable mold iron core (13) connecting piece are both larger than the inner diameter of the through hole (17) of the movable mold fixing frame (6).

2. The secondary turning core pulling mechanism of the metal mold slider according to claim 1 is characterized in that: Two horizontal guide rods (7) are fixedly arranged between the support frame (4) and the fixed mold (2), and the two guide rods (7) are respectively kept perpendicular to the support frame (4) and the fixed mold (2). The left and right ends of the movable mold fixing frame (6) are provided with horizontal guide holes, and the two guide rods (7) are respectively inserted into the two guide holes. The movable mold fixing frame (6) is slidably connected between the fixed mold (2) and the support frame (4) along the axis of the guide rods (7).

3. The secondary turning core pulling mechanism of the metal mold slider according to claim 1 is characterized in that: The length of the large diameter section of the movable mold iron core (13) is less than the length of the limiting hole (16) of the movable mold fixing frame (6); and the length of the small diameter section of the movable mold iron core (13) is greater than the length of the through hole (17) of the movable mold fixing frame (6).

4. The secondary turning core pulling mechanism of the metal mold slider according to claim 3 is characterized in that: Two horizontal connecting rods (19) are fixedly arranged on the end surface of one end of the top plate (10) close to the movable mold (5); an anti-slip column (20) is fixedly arranged on the end of the connecting rod (19) away from the top plate (10); the anti-slip column (20) is coaxially arranged with the connecting rod (19) and the outer diameter of the anti-slip column (20) is larger than the outer diameter of the connecting rod (19); two connecting rod (19) through holes are correspondingly arranged on the movable mold fixing frame (6) and the movable mold (5); the connecting rod (19) through holes The hole is connected to the parting surface of the movable mold (5) and the fixed mold (2), and the two connecting rods (19) are respectively inserted into the two connecting rod (19) through holes; the connecting rod (19) through hole is provided with an anti-slip column groove (24) at the parting surface of the movable mold (5) and the fixed mold (2), the inner diameter of the anti-slip column groove (24) is greater than the outer diameter of the anti-slip column (20), the depth of the anti-slip column groove (24) is equal to the length of the anti-slip column (20), and the anti-slip column (20) is located inside the anti-slip column groove (24).

5. The secondary turning core pulling mechanism of the metal mold slider according to claim 1 is characterized in that: The movable mold iron core (13) is provided with a groove at one end thereof that is connected to the fixed mold iron core (15), and the fixed mold iron core (15) is provided with a protrusion at one end thereof that is connected to the movable mold iron core (13). The protrusion of the fixed mold iron core (15) is inserted into the groove of the movable mold iron core (13).

6. The secondary turning core pulling mechanism of the metal mold slider according to claim 1, characterized in that: The inclined groove is connected to the front and rear end surfaces of the movable mold (5), and the end of the inclined groove close to the fixed mold (2) is further outward than the end of the inclined groove close to the movable mold fixing frame (6); the horizontal cross-section of the slider seat (11) is a triangular structure, and the slider seat (11) slides in the inclined groove along the extension direction of the inclined groove.

7. The secondary turning core pulling mechanism of the metal mold slider according to claim 6 is characterized in that: The movable mold (5) is provided with a slider through hole between the inclined groove and the inside of the cavity (22), and the angle between the axis of the slider through hole and the bottom surface of the inclined groove is 95 degrees; an inner slider (21) is inserted into the slider through hole, and the inner slider (21) is an inner hole core, and is a cylindrical structure as a whole, and its inner end extends into the cavity (22) of the movable mold (5) and the fixed mold (2), and a dovetail block is fixedly provided at the outer end, and the dovetail block is parallel to the inclined groove; a horizontal dovetail groove is provided on the end surface of the slider seat (11) that is inserted into the inclined groove, and the dovetail block on the inner slider (21) is slidably connected in the dovetail groove on the slider seat (11).

8. The secondary turning core pulling mechanism of the metal mold slider according to claim 7 is characterized in that: A horizontal dovetail groove is provided on the outer end surface of the slider seat (11), and an inclined guide slider (12) is slidably connected via the dovetail groove. A horizontal dovetail block on the inclined guide slider (12) is slidably connected to the dovetail groove of the slider seat (11). A connecting rod is fixedly provided on the end surface of the inclined guide slider (12) close to the fixed mold (2). The end of the connecting rod away from the inclined guide slider (12) is fixedly connected to the fixed mold fixing frame (3), and the connecting rod is parallel to the guide rod (7).

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