阅读说明：本技术 一种环状砂芯的芯盒 (Core box of annular sand core ) 是由 申发田 于 2020-06-15 设计创作，主要内容包括：本发明提供了一种环状砂芯的芯盒,属于模具技术领域,包括支撑体、外模具、内模具、若干凸起以及驱动机构；外模具包括至少两个外模板,每个所述外模板均与所述支撑体滑动连接；内模具包括至少三个内模板,每个所述内模板均与所述支撑体滑动连接,且每个所述内模板的弧长均小于内圆周长的一半；若干凸起分别设置在每个所述内模板上,并用于在三个所述内模板拼合后形成环状结构；驱动机构设置在所述支撑体上；通过驱动机构驱动外模板向外运动,使得外模板与环状砂芯的外表面分离,从而完成对环状砂芯内表面的型腔的加工；由于内模板的弧长小于内圆周长的一半,因此,便于内模板在内圆内滑动,从而使得内模板与环状砂芯的内表面分离。(The invention provides a core box of an annular sand core, which belongs to the technical field of dies and comprises a support body, an outer die, an inner die, a plurality of bulges and a driving mechanism, wherein the support body is provided with a plurality of bosses; the outer die comprises at least two outer die plates, and each outer die plate is connected with the support body in a sliding manner; the inner die comprises at least three inner die plates, each inner die plate is connected with the support body in a sliding mode, and the arc length of each inner die plate is smaller than half of the inner circumference; the plurality of bulges are respectively arranged on each inner template and are used for forming an annular structure after the three inner templates are spliced; the driving mechanism is arranged on the supporting body; the driving mechanism drives the outer template to move outwards, so that the outer template is separated from the outer surface of the annular sand core, and the processing of a cavity on the inner surface of the annular sand core is completed; because the arc length of the inner mould plate is less than half of the inner circumference, the inner mould plate can slide in the inner circle conveniently, so that the inner mould plate is separated from the inner surface of the annular sand core.)

1. A core box for an annular sand core, comprising:

a support body (1);

the outer die comprises at least two outer die plates (4), and each outer die plate (4) is connected with the support body (1) in a sliding mode and is used for forming an outer circle after being spliced;

the inner die comprises at least three inner die plates (5), each inner die plate (5) is connected with the support body (1) in a sliding mode and used for forming an inner circle after being spliced, the arc length of each inner die plate (5) is smaller than half of the length of the inner circle, and the inner circle is matched with the outer circle to form a die cavity;

the bulges (2) are respectively arranged on each inner template (5) and are used for forming an annular structure after the three inner templates (5) are spliced; and

the driving mechanism (3) is arranged on the supporting body (1) and is used for driving the outer template (4) to expand outwards and driving the inner template (5) to contract so as to separate the outer template (4) and the inner template (5) from the annular sand core, or used for driving the outer template (4) and the inner template (5) to be matched so as to enable the outer template (4) and the inner template (5) to form an outer circle and an inner circle respectively.

2. A core box for a ring-shaped sand core according to claim 1, characterized in that said driving mechanism (3) comprises a first hydraulic cylinder (31) for driving said outer pattern plate (4) to slide and a second hydraulic cylinder (32) for driving said inner pattern plate (5) to slide.

3. A core box for a ring-shaped sand core according to claim 1, wherein a guide rod (11) is provided on the support body (1), and one end of the guide rod (11) is connected with the support body (1); the inner template (5) is provided with a through hole for the guide rod (11) to pass through; after the inner die plate (5) forms an inner circle, the other end of the guide rod (11) is used for being located in the inner die plate (5).

4. A core box for a ring-shaped sand core according to claim 3, wherein the other end of said guide rod (11) is adapted to form the same circular arc surface with the outer surface of said inner mold plate (5).

5. The core box of the annular sand core as claimed in claim 1, further comprising a plurality of connecting sleeves (6), wherein the connecting sleeves (6) are connected with the protrusions (2) for forming an annular structure after the inner circle is formed on the inner mould plate (5) by the connecting sleeves (6).

6. The core box of the annular sand core as claimed in claim 5, wherein the connecting sleeve (6) is sleeved with the protrusion (2), a tapered groove (61) for clamping the protrusion (2) is formed in the connecting sleeve (6), and the tapered groove (61) has elasticity.

7. The core box of a toroidal sand core as claimed in claim 6, wherein said connecting sleeve (6) is provided with a threaded hole (62), and said inner mold plate (5) is provided with a fastening bolt (63) for screw-fitting with the threaded hole (62) of the connecting sleeve (6).

8. The core box of an annular sand core as claimed in claim 5, wherein said inner mold plate (5) is provided with a plurality of sliding grooves (51), and said inner mold plate (5) is provided with a connecting frame (52); the protrusion (2) is used for being in sliding connection with the sliding groove (51), and a power mechanism used for driving the protrusion (2) to slide is arranged on the connecting frame (52).

9. The core box of the annular sand core as claimed in claim 8, wherein the connecting sleeve (6) is provided with a first inserting groove (64), the protrusion (2) is provided with a second inserting groove (21), the second inserting groove (21) is internally connected with an inserting column (22) in a sliding way, and an elastic part is arranged between the inserting column (22) and the second inserting groove (21); the plug-in column (22) is used for being plugged with the first plug-in groove (64) after the second plug-in groove (21) slides out of the inner template (5).

10. A core box for a ring core according to claim 9, wherein said connecting sleeve (6) is provided with a pin hole (65), said pin hole (65) being in communication with said first insertion slot (64).

Technical Field

The invention belongs to the technical field of molds, and particularly relates to a core box of an annular sand core.

Background

The sand core is a material for manufacturing a mold core in casting production and comprises casting sand, a molding sand adhesive and the like; in the prior art, when an annular sand core is processed, a core column needs to be placed in the middle of a core box, and casting sand and a molding sand binder are placed into the core box after the core box is closed; after the core box is opened, taking down the core column on the annular sand core, and finishing the processing of the annular sand core; generally, the core box mold is provided with the annular protrusion, so that the outer surface of the annular sand core forms the cavity, but when the inner surface of the annular sand core needs to be processed with the cavity, the core column cannot be separated from the processed annular sand core after the annular protrusion is arranged on the core column, and therefore, the inner surface of the annular sand core is inconvenient to process.

Disclosure of Invention

The invention aims to provide a core box of an annular sand core, and aims to solve the technical problem that a cavity is inconvenient to machine on the inner surface of the annular sand core in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: providing a core box of an annular sand core, which comprises a support body, an outer die, an inner die, a plurality of bulges and a driving mechanism; the outer die comprises at least two outer die plates, and each outer die plate is connected with the support body in a sliding mode and is used for forming an outer circle after being spliced; the inner die comprises at least three inner die plates, each inner die plate is connected with the support body in a sliding mode and is used for forming an inner circle after being spliced, the arc length of each inner die plate is smaller than half of the length of the inner circumference, and the inner circle and the outer circle are matched to form a die cavity; the plurality of bulges are respectively arranged on each inner template and are used for forming an annular structure after the three inner templates are spliced; the driving mechanism is arranged on the supporting body and used for driving the outer template to expand outwards and driving the inner template to contract so as to separate the outer template and the inner template from the annular sand core, or used for driving the outer template and the inner template to be matched so as to enable the outer template and the inner template to form an outer circle and an inner circle respectively.

As another embodiment of the application, the driving mechanism comprises a first hydraulic cylinder for driving the outer template to slide and a second hydraulic cylinder for driving the inner template to slide.

As another embodiment of the present application, a guide rod is disposed on the support body, and one end of the guide rod is connected to the support body; the inner template is provided with a through hole for the guide rod to pass through; after the inner die plate forms an inner circle, the other end of the guide rod is used for being located in the inner die plate.

As another embodiment of the present application, the other end of the guide bar is configured to form the same arc surface with the outer surface of the inner mold plate.

As another embodiment of this application, still include a plurality of adapter sleeves, the adapter sleeve with protruding connection is used for behind the inner circle is formed to the inner formword the adapter sleeve forms the loop configuration.

As another embodiment of this application, the adapter sleeve with the arch cup joints, be equipped with on the adapter sleeve and be used for the joint bellied tapering groove, the tapering groove has elasticity.

As another embodiment of this application, be equipped with the screw hole on the adapter sleeve, be equipped with on the inner formword and be used for with the screw hole screw-thread fit's of adapter sleeve fastening bolt.

As another embodiment of the application, a plurality of sliding grooves are formed in the inner template, and a connecting frame is arranged on the inner template; the protrusion is used for being in sliding connection with the sliding groove, and a power mechanism used for driving the protrusion to slide is arranged on the connecting frame.

As another embodiment of the present application, a first inserting groove is formed on the connecting sleeve, a second inserting groove is formed on the protrusion, an inserting column is slidably connected in the second inserting groove, and an elastic member is arranged between the inserting column and the second inserting groove; the inserting column is used for inserting the second inserting groove into the first inserting groove after the second inserting groove slides out of the inner template.

As another embodiment of this application, be equipped with the pinhole on the adapter sleeve, the pinhole with first inserting groove intercommunication.

The core box of the annular sand core provided by the invention has the beneficial effects that: compared with the prior art, the inner die and the outer die are supported by the supporting body, the inner die and the outer die are driven to be matched by the driving mechanism, so that the inner die and the outer die respectively form an inner circle and an outer circle, and a cavity is formed between the inner circle and the outer circle; placing molding sand into the cavity and solidifying the molding sand in the cavity, wherein an annular groove is formed in the inner surface of the molding sand after the molding sand is molded because an annular structure formed by a plurality of bulges is positioned in the cavity; the driving mechanism drives the inner template to contract, so that the inner template is separated from the inner surface of the annular sand core; the driving mechanism drives the outer template to move outwards, so that the outer template is separated from the outer surface of the annular sand core, and the processing of a cavity on the inner surface of the annular sand core is completed; because the arc length of the inner mould plate is less than half of the inner circumference, the inner mould plate can slide in the inner circle conveniently, so that the inner mould plate is separated from the inner surface of the annular sand core.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a core box of an annular sand core provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the opening of the core box of an annular sand core according to an embodiment of the present invention;

FIG. 4 is a schematic view of an inner mold plate portion of a core box of an annular sand core provided in accordance with an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a connecting sleeve part of a core box of an annular sand core provided by the embodiment of the invention;

fig. 6 is an enlarged schematic view of a portion B in fig. 5.

In the figure: 1. a support body; 11. a guide bar; 12. a fixed block; 2. a protrusion; 21. a second insertion groove; 22. inserting the column; 23. a spring; 3. a drive mechanism; 31. a first hydraulic cylinder; 32. a second hydraulic cylinder; 4. an outer template; 5. an inner template; 51. a chute; 52. a connecting frame; 53. a screw; 54. connecting blocks; 6. connecting sleeves; 61. a tapered groove; 62. a threaded hole; 63. fastening a bolt; 64. a first insertion groove; 65. a pinhole.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 6 together, a core box of a ring-shaped sand core according to the present invention will now be described. A core box of an annular sand core comprises a support body 1, an outer die, an inner die, a plurality of protrusions 2 and a driving mechanism 3; the outer die comprises at least two outer die plates 4, and each outer die plate 4 is connected with the support body 1 in a sliding mode and is used for forming an outer circle after being spliced; the inner die comprises at least three inner die plates 5, each inner die plate 5 is connected with the support body 1 in a sliding mode and is used for forming an inner circle after being spliced, the arc length of each inner die plate 5 is smaller than half of the length of the inner circumference, and the inner circle and the outer circle are matched to form a die cavity; the plurality of protrusions 2 are respectively arranged on each inner template 5 and are used for forming an annular structure after the three inner templates 5 are spliced; the driving mechanism 3 is arranged on the supporting body 1 and is used for driving the outer template 4 to expand outwards and driving the inner template 5 to contract so as to separate the outer template 4 and the inner template 5 from the annular sand core, or used for driving the outer template 4 and the inner template 5 to be matched so as to enable the outer template 4 and the inner template 5 to form an outer circle and an inner circle respectively.

Compared with the prior art, the core box of the annular sand core provided by the invention has the advantages that the support body 1 supports the inner die and the outer die, and the driving mechanism 3 drives the inner die and the outer die to be matched, so that the inner die and the outer die respectively form an inner circle and an outer circle; molding sand is placed between the inner circle and the outer circle and is solidified between the inner circle and the outer circle, and because the annular structure formed by the plurality of protrusions 2 is positioned between the inner circle and the outer circle, a cavity is formed on the inner surface of the molding sand after the molding sand is molded; the driving mechanism 3 drives the inner template 5 to contract, so that the inner template 5 is separated from the inner surface of the annular sand core; the driving mechanism 3 drives the outer template 4 to move outwards, so that the outer template 4 is separated from the outer surface of the annular sand core, and the processing of a cavity on the inner surface of the annular sand core is completed; since the inner mould plate 5 has an arc length less than half the inner circumference, it is convenient for the inner mould plate 5 to slide within the inner circle, thereby separating the inner mould plate 5 from the inner surface of the ring core.

Referring to fig. 1 to 6, the driving mechanism 3 includes a first hydraulic cylinder 31 for driving the outer mold plate 4 to slide and a second hydraulic cylinder 32 for driving the inner mold plate 5 to slide; the sliding direction of the inner template 5 is the diameter direction of the inner circle, and the sliding direction of the outer template 4 is the diameter direction of the outer circle; the support body 1 comprises a support plate, and the bottoms of the inner die and the outer die are both contacted with the top of the support plate; the first hydraulic cylinder 31 is fixedly connected with the support plate, and a piston rod of the first hydraulic cylinder 31 is fixedly connected with the outer template 4 and can drive the outer template 4 to slide on the support plate, so that the outer template 4 is matched to form an excircle or the outer template 4 is opened; second pneumatic cylinder 32 and backup pad fixed connection, the piston rod and the interior template 5 fixed connection of second pneumatic cylinder 32 can drive interior template 5 and slide in the backup pad for interior template 5 compound die forms interior circle or makes interior template 5 die sinking.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to fig. 6, in which four inner templates 5 are taken as an example for description; the arc lengths of the two opposite inner templates 5 are equal and are both smaller than the arc lengths of the adjacent inner templates 5; the bulges 2 are arc-shaped and are arranged on the inner template 5, and after the inner template 5 forms an inner circle, the bulges 2 on the inner template 5 form an annular structure; when demoulding, the two inner templates 5 with shorter arc length slide inwards firstly, a gap is reserved between the two ends of the inner templates 5 with shorter arc length and the inner templates 5 with longer arc length, and then the two inner templates 5 with longer arc length slide inwards, so that the four inner templates 5 are separated from the annular sand core, and the demoulding action is completed.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a guide rod 11 is disposed on the support body 1, and one end of the guide rod 11 is connected to the support body 1; the inner template 5 is provided with a through hole for the guide rod 11 to pass through; after the inner template 5 forms an inner circle, the other end of the guide rod 11 is used for being positioned in the inner template 5; a fixed block 12 is fixedly connected to the guide rod 11, and the fixed block 12 is fixedly connected with the support body 1; the guide rod 11 can be fixed on the support body 1 through the fixing block 12, and can guide the inner template 5 in the sliding process of the inner template 5; the end of the guide rod 11 is positioned in the inner template 5, so that the end of the guide rod 11 can be prevented from being positioned in the ring-shaped sand core, and the ring-shaped sand core is conveniently separated from the core box.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 6, the other end of the guide rod 11 is used for forming the same arc surface with the outer surface of the inner formwork 5; the end of the guide rod 11 and the outer surface of the inner template 5 are located on the same arc surface, so that when the annular sand core is manufactured, the annular sand core can be smoothly contacted with the inner template 5, and a columnar structure remained on the annular sand core due to the fact that the molding sand enters the hole of the inner template 5 is avoided.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, further comprising a plurality of connecting sleeves 6, wherein the connecting sleeves 6 are connected with the protrusions 2, and are used for forming an annular structure after the inner circle is formed on the inner template 5; the connecting sleeve 6 is sleeved on the protrusion 2, and the width and the thickness of the protrusion 2 can be increased according to actual needs, so that a preset cavity is formed on the inner surface of the annular sand core conveniently.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a connection sleeve 6 is sleeved with a protrusion 2, a tapered groove 61 for clamping the protrusion 2 is disposed on the connection sleeve 6, and the tapered groove 61 has elasticity; after the connecting sleeve 6 is sleeved with the bulge 2, the bulge 2 is clamped in the elastic conical groove 61, so that the connection between the connecting sleeve 6 and the bulge 2 is facilitated to be enhanced, the driving mechanism 3 can drive the connecting sleeve 6 to move together in the process of driving the inner template 5 to move, the demoulding action is completed, and the die cavity on the inner surface of the annular sand core is facilitated to be processed.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a threaded hole 62 is formed on the connecting sleeve 6, and a fastening bolt 63 for being in threaded fit with the threaded hole 62 of the connecting sleeve 6 is arranged on the inner template 5; the inner formwork 5 and the connecting sleeve 6 are connected through the fastening bolt 63, so that the stability between the inner formwork 5 and the connecting sleeve 6 can be further enhanced, the connecting sleeve 6 can conveniently move along with the inner formwork 5, and the demolding action can be conveniently completed.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, the inner mold plate 5 is provided with a plurality of sliding grooves 51, and the inner mold plate 5 is provided with a connecting frame 52; the bulge 2 is used for being in sliding connection with the sliding groove 51, and a power mechanism for driving the bulge 2 to slide is arranged on the connecting frame 52; the motive mechanism comprises a screw 53 rotatably connected with the connecting frame 52 and a connecting block 54 provided with a threaded hole 62, the connecting block 54 is in threaded fit with the screw 53, and one end of the screw 53 is positioned in the inner template 5 and is relatively fixed with the inner template 5; the screw 53 can be rotated to drive the protrusion 2 to slide in the sliding groove 51, so that the protrusion 2 is connected with the connecting sleeve 6 conveniently.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a first inserting groove 64 is disposed on the connecting sleeve 6, a second inserting groove 21 is disposed on the protrusion 2, an inserting column 22 is slidably connected in the second inserting groove 21, and an elastic member is disposed between the inserting column 22 and the second inserting groove 21; the inserting column 22 is used for inserting the second inserting groove 21 into the first inserting groove 64 after sliding out of the inner template 5; the elastic part comprises a spring 23, and two ends of the spring 23 are respectively fixedly connected with the plug column 22 and the second plug groove 21; the second inserting hole is positioned in the inner template 5, when the connecting sleeve 6 is required to be arranged on the bulge 2, the connecting sleeve 6 is sleeved on the bulge 2, the second inserting groove 21 slides out of the inner template 5 by rotating the screw 53, and the inserting column 22 is ejected out under the action of the spring 23 and is inserted into the first inserting groove 64 on the connecting sleeve 6; after the insertion column 22 is inserted into the first insertion groove 64, one part of the insertion column 22 is located in the first insertion groove 64, and the other part of the insertion column 22 is located in the second insertion groove 21, so that the connection sleeve 6 can be clamped on the protrusion 2, and the connection sleeve 6 can move along with the protrusion 2.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a pinhole 65 is disposed on the connecting sleeve 6, and the pinhole 65 is communicated with the first inserting groove 64; the needle-shaped connecting rod is inserted into the needle hole 65, so that the inserting column 22 can be pushed back into the second inserting groove 21, and the connecting sleeve 6 is convenient to detach.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.