CN214392219U - Core box structure for casting - Google Patents

Abstract

The utility model discloses a core box structure for casting, which comprises a mode locking screw rod, an upper core box die, a lower core box die and a stripping fixture, wherein the upper core box die and the lower core box die are locked at the side edge by the mode locking screw rod; the top of the upper core box mold is provided with a plurality of sand inlet holes, and the side walls of the upper core box mold and the lower core box mold are provided with box lugs; the two sides of the stripping fixture are arranged into bent claw-shaped hooks for hooking the box lugs, a top core screw rod is arranged at the top of the stripping fixture, a top core plate is movably arranged below the top core screw rod, and a top core rod in clearance fit with the sand inlet hole is arranged on the plate surface of the top core plate. The core box structure of the design simulates the core box structure of a core shooter under the condition of no core shooter, the air hose is folded manually, the air hose releases pressure instantly to fill core sand into the core box by releasing air, and then the core box structure is cured by blowing amine manually to manufacture thin-wall complex sand cores, so that the core box structure is convenient and flexible, and is beneficial to development of new products and small-batch production operation.

Description

Core box structure for casting

Technical Field

The utility model relates to a casting technical field, concretely relates to core box structure of casting usefulness.

Background

At present, a thin-wall complex sand core is manufactured in a casting enterprise, a cold core machine and a hot core machine are mainly used for manufacturing the core, and the method is suitable for mass production. When a small batch of new products to be tested are not matched with a core shooter, the mold for manufacturing the thin-wall complex sand core can only be manufactured by an upper mold and a lower mold, the upper mold and the lower mold are filled with cold core sand, compacted, placed into an amine gas box, and blown with amine gas for solidification after sealing, after the sand core is solidified, the mold is required to be lifted, the upper sand core and the lower sand core are bonded together to obtain a complete sand core, and the operation of completing one sand core takes about 20-30 minutes, so that the operation is complex, the production efficiency is low, and the cost is high.

The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a core box structure and manual core making method of sand-packed of casting usefulness to above-mentioned technical problem to improve the production efficiency of manual core box core making.

In order to realize the purpose, the utility model adopts the following technical scheme:

a core box structure for casting comprises a mode locking screw, an upper core box die and a lower core box die; the upper core box die and the lower core box die are locked at the side edges by a lock screw, the top of the upper core box die is provided with a plurality of sand inlet holes, and the side walls of the upper core box die and the lower core box die are provided with box lugs; the mold stripping device is characterized by further comprising a mold stripping fixture, wherein two sides of the mold stripping fixture are arranged to be bent claw-shaped hooks for hooking the box lugs, a top core screw rod is arranged at the top of the mold stripping fixture, a top core plate is movably arranged below the top core screw rod, and a top core rod in clearance fit with the sand inlet hole is arranged on the surface of the top core plate.

Furthermore, the core box structure also comprises a blowing nozzle and a sand filling nozzle which are movably connected with the sand inlet hole, and the sand filling nozzle and the blowing nozzle are respectively connected with the soft air pipe.

Further, there are four locking screws.

Further, the number of the sand inlet holes is 25.

Furthermore, the diameter of the sand inlet hole is 12mm, and the inclination of the sand inlet hole is 3 degrees.

To the utility model discloses a core box structure still provides a manual core making method of sand-packed, it uses the utility model discloses a core box structure is the basis, including following step:

firstly, assembling a core box, and fastening split upper and lower core box dies by adopting four die locking screws;

secondly, filling sand, wherein before filling sand and making a core, an iron block is used for plugging a sand inlet hole and a sand inlet hole is reserved, and the iron block is not used for plugging; folding the soft air pipe when filling sand and making cores, manually tamping cold core sand by using a sand filling nozzle, adhering the core sand to the sand filling nozzle by using the viscosity of the cold core sand, then pressing a reserved sand inlet hole by using the sand filling nozzle, releasing gas at the same time, and filling the core sand into a core box by using the pressure of the instantly released gas until the core box is filled with the core sand; then moving the iron blocks beside the core box to block the sand inlet holes which are just filled, and then carrying out repeated sand filling operation on the sand inlet holes which are just moved by using the sand filling nozzles until all the sand inlet holes of the core box are filled, and finishing the sand filling work of the whole core box;

thirdly, solidifying, namely removing all the iron blocks after finishing the sand filling work of the whole core box, dripping a solidifying liquid into each sand inlet hole to solidify all the sand inlet holes, and then blowing air to all the solidified sand inlet holes by using an air blowing nozzle;

fourthly, disassembling the mold, after the sand core is solidified, firstly disassembling the mold locking screw and placing the top core plate, and aligning the top core rod on the top core plate with the sand inlet hole; secondly, hooking two box lugs on the side wall of the upper core box die by using a die lifting fixture, tightly twisting a core pushing screw rod by using a wrench to slowly separate the upper core box die from the inner core of the core box until the upper core box die is completely separated from the inner core of the core box, and then taking off the die lifting fixture, the core pushing plate and the upper core box die; then, lightly knocking the outer wall of the lower core box mold by using a rubber hammer to separate the sand core from the lower core box mold;

and fifthly, taking out the sand core to obtain the complete thin-wall complex sand core.

Further, the curing liquid in the third step is triethylamine.

Further, the amount of triethylamine amine water is 0.3% of the weight of the sand core.

Further, the air blowing time in the third step is 5-10 seconds.

The utility model has the advantages of compared with the prior art:

(1) according to the core box structure, under the condition that no core shooter is arranged, the core box structure for the thin-wall complex sand core simulation core shooter is cast, the venting plug and the sand shooting channel are arranged, the air hose is folded manually, gas is released to enable the air hose to release pressure instantly to fill core sand into the core box, and then the core box structure is cured by blowing amine manually to manufacture the thin-wall complex sand core; the process is completed manually, machine assistance is not needed, various core boxes can be operated, convenience and flexibility are achieved, new product development and small-batch production operation are facilitated, and barriers that complete thin-wall complex sand cores cannot be completed manually are broken.

(2) The demolding method is characterized in that the two box lugs of the upper core box die are hooked by the stripping fixture, the jacking screw rod is tightly twisted by a wrench, so that the upper core box die is slowly separated from the inner core of the core box until the upper core box die is completely separated from the inner core of the core box, the production efficiency of manual core box making is effectively improved, and the operation is convenient and flexible.

(3) The dosage of triethylamine amine water is 0.3% of the weight of the sand core, which is beneficial to ensuring that the amine water can be fully contacted and solidified with the sand in the core box, the sand core can easily reach the highest strength, and the amine water is saved.

(4) The air blowing time during core making is 5-10 seconds, which is beneficial to ensuring that the amine water can be fully contacted and solidified with the core sand in the core box, the air blowing time is too long, the over blowing can be caused, the amine water and the gas are wasted, and the strength of the core sand can be reduced.

Drawings

FIG. 1 is a schematic structural diagram I of a core box for casting according to the present invention;

fig. 2 is a schematic structural diagram II of a core box for casting according to the present invention.

Reference numerals: 1. an iron block; 2. a blowing nozzle; 3. a sand inlet hole; 4. filling a sand nozzle; 5. softening the trachea; 6. a locking screw; 7. feeding a core box mold; 8. setting a core box mold; 9. a top core plate; 10. a mandrel bar; 11. stripping the mold clamp; 12. a box ear; 13. a core screw; 14. a sand core.

Detailed Description

In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment. It should be understood that the directions "up", "down", "left" and "right" in the following embodiments of the present invention are all based on the position of the corresponding drawing. These directional terms are used for convenience of description only and do not represent limitations on the particular embodiments of the present invention. Unless otherwise specified, like reference numerals in the reference numerals refer to like structures.

Referring to fig. 1 and 2, the core box structure for casting of the present invention includes a locking screw 6, an upper core box mold 7, and a lower core box mold 8; the utility model provides an go up core box mould 7 and core box mould 8 down are locked at the side with four mode locking screws 6, it is provided with 25 sand inlet 3 to go up core box mould 7 top, and sand inlet 3 sets up in the thick big department of psammitolite to appear not compact (loose) and the unsaturated circumstances when avoiding making the psammitolite. The diameter of the sand inlet hole 3 is 12mm, the inclination is 3 degrees, and the compactness of the sand core during efficient sand filling and core making is ensured. And box lugs 12 are arranged on the side walls of the upper core box die 7 and the lower core box die 8. And simultaneously, the utility model discloses in still the design have with the supporting drawing jig 11 that uses of core box structure, the claw form that colludes of crooked is set to the both sides of drawing jig 11 for catch on the case ear 12 of 7 lateral walls of last core box mould, set up ejection core screw 13 at drawing jig 11 top, ejection core screw 13 below movable mounting has ejection core board 9, be provided with on the face of ejection core board 9 with advance 3 clearance fit's of sand hole ejection core pole 10. Referring to fig. 1, when the core box structure is used, a blowing nozzle 2 and a sand filling nozzle 4 are connected through a sand inlet hole 3, and the sand filling nozzle 4 and the blowing nozzle 2 are connected with a soft air pipe 5.

The utility model discloses a core making method of utilizing manual sand-filling of core box structure mainly is through core shooting principle of core shooting machine, under the condition that does not have core shooting mechanism, the both sides of upper and lower core box mould of components of a whole that can function independently are with four mode locking screws 6 fastening core boxes, through the artifical method of filling cold core sand and dripping amine water blowing solidification, accomplish the preparation of the complicated psammitolite of thin wall, see figure 1 and figure 2, its core making method includes following step:

firstly, assembling a core box, and fastening split upper and lower core box dies by adopting four die locking screws 6;

secondly, filling sand, wherein before filling sand and making a core, an iron block 1 is used for plugging a sand inlet hole 3, a sand inlet hole 3 is reserved, and the iron block 1 is not placed for plugging; folding the soft air pipe 5 when filling sand and making cores, manually tamping the cold core sand by using a sand filling nozzle 4, adhering the core sand on the sand filling nozzle 4 by using the viscosity of the cold core sand, then pressing the sand filling nozzle 4 against a reserved sand inlet hole 3, releasing air, and filling the core sand into a core box by using the pressure of the instantaneously released air until the core box is filled; then moving the iron block 1 beside to block the sand inlet hole 3 which is just filled, and then repeating sand filling operation on the sand inlet hole 3 of the iron block 1 which is just moved by using the sand filling nozzle 4 until all the sand inlet holes 3 of the core box are filled, and finishing the whole core box sand filling work;

thirdly, curing, namely removing all the iron blocks 1 after finishing the sand filling work of the whole core box, and dripping triethylamine curing liquid into each sand inlet hole 3, wherein the dosage of triethylamine amine water is 0.3 percent of the weight of the sand core; dripping amine water to solidify all the sand inlet holes 3, and then blowing air to all the solidified sand inlet holes 3 by using the air blowing nozzle 2 for 8 seconds;

fourthly, disassembling the mold, after the sand core 14 is solidified, firstly disassembling the mold locking screw 6 and placing the top core plate 9, so that the top core rod 10 on the top core plate 9 is aligned with the sand inlet hole 3; secondly, hooking two box lugs 12 on the side wall of the upper core box die 7 by using a die lifting clamp 11, tightly twisting a core pushing screw rod 13 by using a wrench to slowly separate the upper core box die 7 from the inner core 14 of the core box until the upper core box die 7 is completely separated from the inner core 14 of the core box, and then taking off the die lifting clamp 11, the core pushing plate 9 and the upper core box die 7; then, lightly knocking the outer wall of the lower core box mold 8 by using a rubber hammer to separate the sand core 14 from the lower core box mold 8;

and fifthly, taking out the sand core 14 to obtain the complete thin-wall complex sand core.

The core making method of the core box of the utility model has the advantages that: 1. the complete thin-wall complex sand core can be completed manually without machine assistance, and various core boxes can be operated conveniently and flexibly; 2. the development of new products and the operation of small-batch production are facilitated; 3. breaking the barriers that the complete thin-wall complex sand core cannot be completed by hand.

The above-mentioned embodiments are only described in the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention.

Claims (5)

1. A core box structure for casting, which is characterized in that: comprises a mode locking screw rod, an upper core box die and a lower core box die; the upper core box die and the lower core box die are locked at the side edges by a lock screw, the top of the upper core box die is provided with a plurality of sand inlet holes, and the side walls of the upper core box die and the lower core box die are provided with box lugs; the mold stripping device is characterized by further comprising a mold stripping fixture, wherein two sides of the mold stripping fixture are arranged to be bent claw-shaped hooks for hooking the box lugs, a top core screw rod is arranged at the top of the mold stripping fixture, a top core plate is movably arranged below the top core screw rod, and a top core rod in clearance fit with the sand inlet hole is arranged on the surface of the top core plate.

2. A core box structure for casting as claimed in claim 1, wherein: the sand filling device further comprises a blowing nozzle and a sand filling nozzle which are movably connected with the sand inlet hole, and the sand filling nozzle and the blowing nozzle are respectively connected with the soft air pipe.

3. A core box structure for casting as claimed in claim 1, wherein: four locking screws are arranged.

4. A core box structure for casting as claimed in claim 1, wherein: the number of the sand inlet holes is 25.

5. A core box structure for foundry use as claimed in claim 4, wherein: the diameter of the sand inlet hole is 12mm, and the inclination of the sand inlet hole is 3 degrees.

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