阅读说明：本技术 一种抽芯结构及模具 (Core pulling structure and mold ) 是由 林国栋 潘曙光 陈浩 林潘定 陈继会 陈艳华 于 2021-08-05 设计创作，主要内容包括：本发明提供了一种抽芯结构及模具,涉及涡轮增压器制造技术领域。抽芯结构包括定模框、定模芯、动模框、动模芯、芯块、导向机构和芯座；定模芯设置于定模框的底部；动模芯设置于动模框的顶部,动模芯适于与定模芯合模以形成用于成型涡轮增压器壳体的型腔,动模芯的一侧开设有入口槽,入口槽与动模芯的凹腔连通；芯块的一端适于从入口槽处深入动模芯的凹腔中以形成涡轮增压器壳体的出气管的内腔；导向机构包括支板,支板与动模芯或动模框连接,支板开设有弧形滑槽,弧形滑槽的圆心与出气管的圆心同心；芯座与芯块的另一端连接,芯座适于沿弧形滑槽的长度方向滑动。本发明通过导向机构为芯块提供圆弧方向上的运动而完成抽芯,结构简单,抽芯便捷。(The invention provides a core-pulling structure and a mold, and relates to the technical field of turbocharger manufacturing. The core-pulling structure comprises a fixed mold frame, a fixed mold core, a movable mold frame, a movable mold core, a core block, a guide mechanism and a core seat; the fixed mold core is arranged at the bottom of the fixed mold frame; the movable mold core is arranged at the top of the movable mold frame and is suitable for being matched with the fixed mold core to form a cavity for molding the turbocharger shell, and an inlet groove is formed in one side of the movable mold core and is communicated with the concave cavity of the movable mold core; one end of the core block is suitable for penetrating into the concave cavity of the movable mold core from the inlet groove to form an inner cavity of an air outlet pipe of the turbocharger shell; the guide mechanism comprises a support plate, the support plate is connected with the movable mold core or the movable mold frame, the support plate is provided with an arc-shaped chute, and the circle center of the arc-shaped chute is concentric with the circle center of the air outlet pipe; the core seat is connected with the other end of the core block and is suitable for sliding along the length direction of the arc-shaped sliding groove. The core pulling device provided by the invention can provide motion in the arc direction for the core block through the guide mechanism to complete core pulling, and has the advantages of simple structure and convenience in core pulling.)

1. A core pulling structure is characterized by comprising:

a fixed mould frame (1);

the fixed mold core (11), the fixed mold core (11) is arranged at the bottom of the fixed mold frame (1);

a movable mould frame (2);

the movable mold core (21) is arranged at the top of the movable mold frame (2), the movable mold core (21) is suitable for being matched with the fixed mold core (11) to form a cavity for forming the turbocharger shell (9), one side of the movable mold core (21) is provided with an inlet groove (211), and the inlet groove (211) is communicated with a concave cavity of the movable mold core (21);

a core block (5), wherein one end of the core block (5) is suitable for penetrating into the concave cavity of the movable mold core (21) from the inlet groove (211) to form an inner cavity of an air outlet pipe (91) of the turbocharger shell (9);

the guide mechanism comprises a support plate (6), the support plate (6) is connected with the movable mold core (21) or the movable mold frame (2), the support plate (6) is provided with an arc-shaped sliding groove (61), and the circle center of the arc-shaped sliding groove (61) is concentric with the circle center of the air outlet pipe (91); and

the core seat (7) is connected with the other end of the core block (5), and the core seat (7) is suitable for sliding along the length direction of the arc-shaped sliding groove (61).

2. The core pulling structure according to claim 1, wherein the core print (7) comprises a core print body and an arc-shaped sliding block (71) located on a side surface of the core print body, and the arc-shaped sliding block (71) is matched with the arc-shaped sliding groove (61).

3. The core pulling structure according to claim 2, wherein the number of the support plates (6) is two, the arc sliding grooves (61) are formed in one side of the two support plates (6) close to each other, the core holder (7) is located between the two support plates (6), the number of the arc sliding blocks (71) is two, the two arc sliding blocks (71) are symmetrically arranged on two sides of the core holder body, and the two arc sliding blocks (71) are respectively arranged in the corresponding arc sliding grooves (61).

4. The core pulling structure according to claim 1, wherein a placing cavity matched with the movable mold core (21) is formed in the top of the movable mold frame (2), an open groove (22) for the core block (5) and the core base (7) to move is further formed in one side of the movable mold frame (2), the open groove (22) is communicated with the placing cavity, a mounting groove (221) is formed in the inner wall of the open groove (22), the support plate (6) is provided with a mounting bar (62), the mounting bar (62) is matched with the mounting groove (221), and the support plate (6) is connected with the movable mold frame (2) through a threaded piece.

5. The core pulling structure according to claim 4, characterized in that the support plate is further provided with a corner notch (63), the corner notch (63) comprises a vertical wall (631) and a horizontal wall (632), the vertical wall (631) and the horizontal wall (632) are perpendicular, the vertical wall (631) is suitable for abutting against a side wall of the movable mold core (21), and the horizontal wall (632) is suitable for abutting against a bottom wall of the movable mold core (21).

6. The core-pulling structure according to claim 1, characterized in that the core block (5) comprises a core block body (51) and a bump block (52), the bump block (52) being connected to the core block body (51);

the core-pulling structure further comprises a locking block (12), the locking block (12) is connected with the fixed mold core (11), and the locking block (12) is matched with the protruding block (52) during mold closing so that the core block (5) is fixed;

the core block body (51) comprises a block piece (511) and a rod piece (512), the rod piece (512) is integrally arranged with the block piece (511), the rod piece (512) is suitable for penetrating into the concave cavity of the movable mold core (21) from the inlet groove (211) to form an inner cavity of an air outlet pipe (91) of the turbocharger shell (9), the block piece (511) is suitable for forming an end face of the air outlet pipe (91) of the turbocharger shell (9), one end of the block piece (511) far away from the rod piece (512) is connected with the core seat (7), and the protruding piece (52) is arranged at the block piece (511).

7. The core pulling structure according to any one of claims 1 to 6, further comprising a driving mechanism (8), wherein the driving mechanism (8) is connected with the guiding mechanism, and the driving mechanism (8) is suitable for driving the core holder (7) to slide along the length direction of the arc-shaped sliding chute (61).

8. The core pulling structure according to claim 7, wherein a notch groove (72) is formed in one end, away from the core block (5), of the core holder (7), a movable pin (73) is rotatably connected between inner walls of the notch groove (72), the driving mechanism (8) comprises an oil cylinder support (84) and an oil cylinder (81), the oil cylinder support (84) is connected with the guiding mechanism, the oil cylinder (81) is connected with the oil cylinder support (84), and an end portion of a piston rod of the oil cylinder (81) is hinged to the movable pin (73).

9. The core pulling structure according to claim 8, characterized in that an end of a piston rod of the oil cylinder (81) is connected with a sleeve member (82), the sleeve member (82) is sleeved on the surface of the movable pin (73), the sleeve member (82) is provided with an oblong hole (83), the width of the oblong hole (83) is matched with the diameter of the movable pin (73), and the length of the oblong hole (83) is larger than the diameter of the movable pin (73).

10. A mold comprising a core back structure according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of turbocharger manufacturing, in particular to a core pulling structure and a mold.

Background

A turbocharger is an important component of an automobile, and is actually an air compressor that increases the amount of intake air by compressing air. The material is usually aluminum alloy, which utilizes the inertia impulse force of the exhaust gas from the engine to push the turbine in the turbine chamber, the turbine drives the coaxial impeller, and the impeller further presses and feeds the air sent from the air filter pipeline to pressurize the air to enter the cylinder. In the production and manufacturing of aluminum alloy die-casting spare part, die casting die is the most conventional forming tool, but because the material is that the turbo charger shell structure of aluminum alloy is complicated, for example for smooth and easy of air current, the air flue (be the outlet duct of turbo charger casing) often adopts the circular arc structure, lead to die casting die structure shaping difficulty, adopt 2 hydro-cylinders more, one is used for loosing core, another is used for locking, the mould inner space occupies greatly, lead to inside ejecting and cooling device to be restricted, it is great to be suitable for the restriction of product type, and because of the complicated reason of structure, the production process often easily breaks down, and is inefficient. If the casting process is adopted for production, the cost of the parts is greatly increased, and the production process is not environment-friendly.

Disclosure of Invention

The invention aims to improve the structure of a mold for producing a turbocharger shell to a certain extent and improve the production efficiency of the turbocharger shell.

In order to solve the above problems, the present invention provides a core pulling structure, including:

a fixed mould frame;

the fixed mold core is arranged at the bottom of the fixed mold frame;

moving the mold frame;

the movable mold core is arranged at the top of the movable mold frame and is suitable for being matched with the fixed mold core to form a cavity for molding the turbocharger shell, an inlet groove is formed in one side of the movable mold core, and the inlet groove is communicated with a concave cavity of the movable mold core;

a core block, one end of which is suitable for penetrating into the cavity of the movable mold core from the inlet groove to form an inner cavity of the air outlet pipe of the turbocharger shell;

the guide mechanism comprises a support plate, the support plate is connected with the movable mold core or the movable mold frame, an arc-shaped chute is formed in the support plate, and the circle center of the arc-shaped chute is concentric with the circle center of the air outlet pipe; and

the core seat is connected with the other end of the core block and is suitable for sliding along the length direction of the arc-shaped sliding groove.

Further, the core print comprises a core print body and an arc-shaped sliding block positioned on the side surface of the core print body, and the arc-shaped sliding block is matched with the arc-shaped sliding groove.

Furthermore, the two support plates are arranged, the arc-shaped sliding grooves are formed in one side, close to the two support plates, of the two support plates, the core seat is located between the two support plates, the two arc-shaped sliding blocks are symmetrically arranged on two sides of the core seat body, and the two arc-shaped sliding blocks are respectively arranged in the corresponding arc-shaped sliding grooves.

Further, the top of movable mould frame seted up with movable mould core assorted lays the chamber, the confession has still been seted up to one side of movable mould frame the pellet with the uncovered groove of core print motion, uncovered groove with lay the chamber intercommunication, the mounting groove has been seted up to the inner wall in uncovered groove, the extension board is provided with the mounting bar, the mounting bar with the mounting groove matches, the extension board with the movable mould frame passes through the screw thread spare and is connected.

Furthermore, the support plate is further provided with corner notches, each corner notch comprises a vertical wall and a horizontal wall, the vertical walls are perpendicular to the horizontal walls, the vertical walls are suitable for being abutted to the side walls of the movable mold core, and the horizontal walls are suitable for being abutted to the bottom wall of the movable mold core.

Further, the core block comprises a core block body and a convex block, and the convex block is connected with the core block body;

the core pulling structure also comprises a locking block, the locking block is connected with the fixed die core, and the locking block is matched with the protruding block during die assembly so as to fix the position of the core block;

the core block body comprises a block piece and a rod piece, the rod piece and the block piece are arranged integrally, the rod piece is suitable for penetrating into the cavity of the movable mold core from the inlet groove to form an inner cavity of the air outlet pipe of the turbocharger shell, the block piece is suitable for forming the end face of the air outlet pipe of the turbocharger shell, one end, far away from the rod piece, of the block piece is connected with the core seat, and the protruding block is arranged at the block piece.

Further, the core holder is suitable for driving the core holder to slide along the length direction of the arc-shaped sliding groove.

Further, the core print is kept away from the breach groove has been seted up to the one end of core piece, it is connected with the loose pin to rotate between the inner wall in breach groove, actuating mechanism includes hydro-cylinder support and hydro-cylinder, the hydro-cylinder support with guiding mechanism connects, the hydro-cylinder with the hydro-cylinder support is connected, the tip of the piston rod of hydro-cylinder with the loose pin is articulated, the length direction of hydro-cylinder with the contained angle of the upper and lower direction of movable mould core is the acute angle.

Furthermore, the end of a piston rod of the oil cylinder is connected with a sleeve, the sleeve is sleeved on the surface of the movable pin, the sleeve is provided with a long round hole, the width of the long round hole is matched with the diameter of the movable pin, and the length of the long round hole is larger than the diameter of the movable pin.

The invention also provides a mould which comprises the core-pulling structure.

Since the mold plays the same role in the present invention as the core back structure, the description of the mold will not be repeated.

Compared with the prior art, the core-pulling structure and the die provided by the invention have the following beneficial effects that:

the core block connected with the core seat is guided by the arc-shaped sliding groove of the support plate to further enable the core block to penetrate into the cavity through the inlet groove along a set direction, so that the core block can form an inner cavity of an air outlet pipe of a turbocharger shell, after the turbocharger shell is formed, the sealing bottom plate can be driven by a die casting machine to move towards a direction far away from the fixed die plate, so that the movable die frame is driven to be separated from the movable die core and the fixed die core to realize die opening, and then core pulling motion is performed, wherein the core block is pulled out along the set direction, so that the core block and the inner cavity of the air outlet pipe of the formed turbocharger shell are pulled out, and then the turbocharger shell is ejected out through ejection motion. Simple structure, it is convenient to loose core.

Drawings

FIG. 1 is a schematic structural view of a mold of an embodiment of the present invention;

FIG. 2 is a schematic exploded view of a mold according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of a turbocharger housing of an embodiment of the present invention;

FIG. 4 is a schematic structural view of a core block of an embodiment of the present invention;

FIG. 5 is a schematic block diagram of a support plate according to an embodiment of the present invention;

FIG. 6 is a schematic block diagram of a cartridge according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a mold of an embodiment of the invention.

Description of reference numerals:

1-fixed die frame, 11-fixed die core, 12-locking block, 2-movable die frame, 21-movable die core, 211-inlet slot, 22-opening slot, 221-mounting slot, 3-bottom sealing plate, 4-die foot, 5-core block, 51-core block body, 511-block piece, 512-rod piece, 52-bulge piece, 6-support plate, 61-arc chute, 62-mounting strip, 63-corner notch, 631-vertical wall, 632-horizontal wall, 7-core seat, 71-arc slide block, 72-notch slot, 73-movable pin, 8-driving mechanism, 81-oil cylinder, 82-external member, 83-slotted hole, 84-oil cylinder support, 9-turbocharger shell and 91-air outlet pipe.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Also, in the drawings, the Z-axis represents a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) represents up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) represents down; it should also be noted that the foregoing Z-axis representation is meant only to facilitate description of the invention and to simplify description, and is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 3, a core pulling structure according to an embodiment of the present invention includes a fixed mold frame 1, a fixed mold core 11, a movable mold frame 2, a movable mold core 21, a core block 5, a guide mechanism, and a core print 7; the fixed mold core 11 is arranged at the bottom of the fixed mold frame 1; the movable mold core 21 is arranged at the top of the movable mold frame 2, the movable mold core 21 is suitable for being matched with the fixed mold core 11 to form a cavity for molding the turbocharger shell 9, an inlet groove 211 is formed in one side of the movable mold core 21, and the inlet groove 211 is communicated with a cavity of the movable mold core 21; one end of the core block 5 is suitable for penetrating into the concave cavity of the movable mold core 21 from the inlet groove 211 to form an inner cavity of the air outlet pipe 91 of the turbocharger shell 9; the guide mechanism comprises a support plate 6, the support plate 6 is connected with the movable mold core 21 or the movable mold frame 2, the support plate 6 is provided with an arc-shaped chute 61, and the circle center of the arc-shaped chute 61 is concentric with the circle center of the air outlet pipe 91; the core print 7 is connected to the other end of the core block 5, and the core print 7 is adapted to slide along the length direction of the arc chute 61 (i.e. the arc length direction of the arc chute).

It can be understood that, the cover half core 11 can be dismantled with cover half frame 1 and link together, movable mold core 21 can be dismantled with movable mould frame 2 and link together, when the die sinking, cover half core 11 and cover half frame 1 remain motionless, movable mold core 21 is motionless relatively with movable mould frame 2, cover half frame 1 links together with the fixed die plate of die casting machine, movable mold frame 2 is connected with back cover plate 3 through the back cover plate foot 4, back cover plate 3 is connected with the medium plate of die casting machine, when the die sinking, the die casting machine drives back cover plate 3, the back cover plate foot 4, movable mold frame 2 and movable mold core 21 move downwards to realize the die sinking, later do ejecting motion again and ejecting 9 ejecting with fashioned turbine casing.

It can be understood that the aforementioned "the center of the arc chute 61 is concentric with the center of the outlet pipe 91" means that the inner cavity of the outlet pipe 91 of the turbocharger housing 9, which is not ejected yet after molding, is concentric with the center of the arc chute 61.

Here, the core block 5 connected with the core block 7 is guided by the arc-shaped chute 61 of the support plate to further enter the cavity through the inlet slot 211 along a set direction, so as to ensure that the core block 5 can form an inner cavity of the air outlet pipe 91 of the turbocharger housing 9, after the turbocharger housing 9 is molded, the die casting machine can drive the bottom sealing plate 3 to move towards a direction far away from the fixed mold frame 1, so as to drive the movable mold frame 2 to be separated from the movable mold core 21 and the fixed mold core 11 to realize mold opening, and then core pulling motion is performed, wherein the core block 5 is pulled out along the set direction, so that the core block 5 and the inner cavity of the air outlet pipe 91 of the molded turbocharger housing 9 are pulled out, and then the turbocharger housing 9 is ejected through ejection motion, in this embodiment, the arc-shaped chute 61 is provided on the support plate 6 to provide a motion in an arc direction for the core block 7, and then the movement in the set direction is provided for the core block 5 connected with the core seat 7 to be drawn out from the formed air outlet pipe 91, the structure is simple, and the core pulling is convenient.

It should be noted that the aforementioned "setting direction" is a moving direction of the core block 5, which is not a straight line, and the setting direction is also an arc direction, and the center of the arc direction is concentric with the center of the arc chute 61, and it can be understood that the radius of the circle in the setting direction may be the same as or different from the radius of the circle in the arc chute 61.

Referring to fig. 6, optionally, the core print 7 includes a core print body and an arc-shaped sliding block 71 located at the side of the core print body, and the arc-shaped sliding block 71 is engaged with the arc-shaped sliding groove 61.

Here, the movement of the core print 7 in the arc direction is realized by the cooperation of the arc slide block 71 on the side of the core print 7 and the arc slide groove 61, and the core block 5 is driven to move in the set direction.

Referring to fig. 2, optionally, two support plates 6 are provided, an arc-shaped chute 61 is provided at one side of the two support plates 6 close to each other, and the core print 7 is located between the two support plates 6; wherein, the arc slider 71 also is provided with two, and two arc sliders 71 symmetry set up in the both sides of core print body, and two arc sliders 71 are arranged in corresponding arc spout 61 respectively.

Here, the two support plates 6 are provided, the core print 7 is arranged between the two support plates 6, and the arc-shaped sliding blocks 71 on two sides of the core print 7 are arranged in the arc-shaped sliding grooves 61 of the corresponding support plates 6, so that the structure is simple and the assembly and disassembly are convenient.

Referring to fig. 2, optionally, the movable mold frame 2 is connected to the movable mold core 21, the top of the movable mold frame 2 is provided with a placement cavity matched with the movable mold core 21, one side of the movable mold frame 2 is further provided with an open groove 22 for the movement of the core block 5 and the core base 7, the open groove 22 is communicated with the placement cavity, the inner wall of the open groove 22 is provided with a mounting groove 221, the support plate 6 is provided with a mounting strip 62, the mounting strip 62 is matched with the mounting groove 221, and the support plate 6 is connected to the movable mold frame 2 through a threaded part.

Here, the fitting of the mounting groove 221 and the mounting bar 62 facilitates the mounting of the support plate 6 in place, while the bottom end of the mounting bar 62 can be supported on the top of the die foot 4, thereby ensuring that the arc-shaped chute 61 mounted in place on the support plate 6 can provide movement of the core block 5 in a set direction.

Referring to fig. 2 and 5, the support plate is further provided with a corner notch 63, the corner notch 63 includes a vertical wall 631 and a horizontal wall 632, the vertical wall 631 is perpendicular to the horizontal wall 632, the vertical wall 631 is adapted to abut against a side wall of the movable mold core 21, and the horizontal wall 632 is adapted to abut against a bottom wall of the movable mold core 21.

Here, the installation of the support plate 6 can be completed more quickly by the corner notch 63, which specifically includes: the support plate 6 is installed at the open slot 22 on one side of the movable mold frame 2, the corner notches 63 of the support plate 6 enter the open slot 22 firstly, after the vertical wall 631 abuts against the side wall of the movable mold core 21, the support plate 6 is moved above the horizontal direction to enable the installation strip 62 on one side of the support plate 6 to be placed in the installation slot 221, then the support plate 6 is moved along the installation slot 221, the horizontal wall 632 abuts against the bottom wall of the movable mold core 21, the position of the support plate 6 is installed in place at the moment, then the reserved threaded hole in the support plate 6 is connected with the reserved threaded hole in the movable mold frame 2 through a screw, and the support plate 6 is fixed.

Referring to fig. 2, 4, 7, alternatively, the core block 5 comprises a core block body 51 and a bump block 52, the bump block 52 being connected with the core block body 51; the core-pulling structure also comprises a locking block 12, wherein the locking block 12 is connected with the fixed die core 11, and the locking block 12 is matched with the convex block 52 during die assembly so as to fix the position of the core block 5.

Here, because of the die-casting, in order to ensure that the core block 5 is not pushed after the casting liquid enters the cavity, the locking block 12 is arranged to limit the protruding block 52, so as to ensure that the core block 5 does not move when forming the inner cavity of the outlet pipe 91 of the turbocharger housing 9.

It can be understood that the open slot 22 of the movable mold frame 2 can be provided with a limiting structure, so as to ensure that the core block 5 extends into the mold cavity until the core block is just positioned at a set position after being limited by the limiting structure.

The core-pulling structure provided by the embodiment utilizes a small space outside the die, the core block 5 for core pulling, the arc-shaped sliding groove 61 for guiding, the hydraulic oil cylinder 81 and the locking block 12 of the static die are arranged, a large space in the middle of the die is reserved, the core-pulling structure can be used for arranging the ejection mechanism and the cooling pipeline, the space utilization is reasonable, the integration level is high, the structure is reliable, and the difficult problem that the die-casting production of the arc-shaped structure product of the aluminum alloy shell is difficult to realize for a long time is solved.

The locking block 12 is used for ensuring that the core block 5 cannot retreat after die assembly, and particularly limiting the convex block 52 on the core block 5, so that the core block 5 cannot retreat, the structure is safe and reliable, and a locking oil cylinder required by the traditional method is saved.

Referring to fig. 4 and 7, optionally, the core block body 51 comprises a block piece 511 and a rod piece 512, the rod piece 512 is integrally arranged with the block piece 511, the rod piece 512 is suitable for penetrating into the cavity of the movable mold core 21 from the inlet groove 211 to form an inner cavity of the air outlet pipe 91 of the turbocharger housing 9, the block piece 511 is suitable for forming an end surface of the air outlet pipe 91 of the turbocharger housing 9, wherein one end of the block piece 511, which is far away from the rod piece 512, is connected with the core seat 7, and the protruding piece 52 is arranged at the block piece 511.

It is understood that the area of the end surface of the block 511 connected to the rod member 512 is larger than the area of the end surface of the rod member 512 connected to the block 511, so that the end surface of the block 511 connected to the rod member 512 is used for molding the end surface of the nozzle of the outlet pipe 91. One end of the block piece 511, which is far away from the rod-shaped piece 512, is provided with a large-size block, when the mold is closed, the large-size piece abuts against the outer side wall of the movable mold core 21, the large-size piece and the protruding block 52 limit the core block 5 together, the core block 5 cannot continue to advance into the movable mold core 21, and meanwhile, the locking block 12 limits the protruding block 52, so that the fixed position of the core block 5 after mold closing is ensured to be unchanged.

Referring to fig. 1, 2 and 7, the device further comprises a driving mechanism 8, the driving mechanism 8 is connected with the guiding mechanism, and the driving mechanism 8 is suitable for driving the core print 7 to slide along the length direction of the arc-shaped sliding chute 61.

Here, the driving mechanism 8 can automatically drive the core blocks 5, and the degree of automation is higher without manual control.

Referring to fig. 6 and 7, a notched groove 72 is formed in one end of the core seat 7 away from the core block 5, a movable pin 73 is rotatably connected between inner walls of the notched groove 72, the driving mechanism 8 includes a cylinder support 84 and a cylinder 81, the cylinder support 84 is connected with the guiding mechanism, the cylinder 81 is connected with the cylinder support 84, and an end of a piston rod of the cylinder 81 is hinged to the movable pin 73.

Here, the notch groove 72 is opened at one end of the core print 7 away from the core block 5, the movable pin 73 is provided in the notch groove 72, and the end of the piston rod of the oil cylinder 81 is hinged to the movable pin 73, so that the structure is compact and the integration degree is high.

Referring to fig. 7, optionally, a sleeve 82 is connected to an end of a piston rod of the cylinder 81, the sleeve 82 is sleeved on the surface of the movable pin 73, the sleeve 82 is provided with an elongated hole 83, the width of the elongated hole 83 matches with the diameter of the movable pin 73, and the length of the elongated hole 83 is greater than the diameter of the movable pin 73.

Here, since the piston rod moves linearly, the core print 7 moves along an arc of the arc chute 61, and thus the driving of the core print 7 by the piston rod is ensured by providing the oblong hole 83 to cooperate with the movable pin.

The mold according to another embodiment of the invention comprises the core pulling structure.

Since the mold plays the same role as the core back structure in this embodiment, the mold will not be explained.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.