CN219724528U

CN219724528U - Sand core weight-reducing core pulling device of hot core box die

Info

Publication number: CN219724528U
Application number: CN202321040924.5U
Authority: CN
Inventors: 刘必生; 徐光雨; 沈海峰
Original assignee: Suzhou Chuo Malleable Iron Co ltd
Current assignee: Suzhou Chuo Malleable Iron Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-09-22
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses a sand core weight-reducing core pulling device of a hot core box die, which comprises a fixed die and a movable die, wherein sand core cavities are formed in the fixed die and the movable die, a sand shooting opening is formed above the sand core cavities, first heating pipes are arranged in the fixed die and the movable die, movable blocks are arranged in the sand core cavities, the movable blocks are of hollow structures and are internally provided with second heating pipes, a movable block bottom plate is arranged below the movable blocks, a drawing structure is arranged below the movable block bottom plate, the drawing structure comprises a top pull rod, the lower end of the top pull rod is connected with a cylinder, and the cylinder is erected below the fixed die. The beneficial effects of the utility model are as follows: the load of the pumping structure can be reduced, the weight of the core pulling device is reduced, the operation difficulty is reduced, and the material cost is saved; the strength of the sand core can be effectively improved, and the weight of the sand core is reduced; the automatic pushing-in or pulling-out loose piece is realized, so that automatic core setting operation is realized, automatic operation is realized, potential safety hazards caused by manual operation can be avoided, and the production efficiency of the sand core is greatly improved.

Description

Sand core weight-reducing core pulling device of hot core box die

Technical Field

The utility model relates to the technical field of sand core forming, in particular to a weight-reducing core-pulling device for a sand core of a hot core box die.

Background

When the casting is produced, the shape of the inner cavity is generally manufactured and formed by a sand core. In order to facilitate core setting operation and resource saving, lightweight treatment is generally adopted for the sand core, and two methods are adopted. The first method is a emptying method: the sand core is turned 180 degrees to pour out uncured core sand from the sand injection port, but the sand injection port is smaller, so that the sand output is less, the effect is limited even if the sand is output by vibration, the noise is loud, and the physical and psychological health of an operator is influenced; the second method is a loose block method: a certain volume of metal blocks 18 (namely movable blocks) are placed in the sand core mould 17, as shown in fig. 1, so that the core sand filling amount is reduced, after the sand core is solidified and formed, the metal blocks 18 are taken out and then the sand core is ejected, and the disadvantage is that the metal blocks 18 attached to the sand core mould 17 are not easy to take down after being heated and expanded, and an operator is required to repeatedly knock with a wood hammer, so that the sand core is easy to knock out; secondly, the temperature of the sand core mould 17 is up to more than 250 ℃, and the sand core mould is repeatedly assembled and disassembled at high frequency, so that the mould can be damaged, and the fingers of operators can be easily scalded.

Disclosure of Invention

The utility model aims to provide a core-pulling device for reducing weight of a sand core of a hot core box die, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a hot core box mould psammitolite subtracts heavy core pulling device, includes cover half and movable mould, all be equipped with the psammitolite die cavity on cover half and the movable mould, the top of psammitolite die cavity is equipped with the sand mouth, all be equipped with first heating pipe in cover half and the movable mould, be equipped with the loose piece in the psammitolite die cavity, the loose piece is hollow structure, is equipped with the second heating pipe in it, the below of loose piece is equipped with the loose piece bottom plate, the below of loose piece bottom plate is equipped with the structure of drawing forth, the structure of drawing forth contains the top pull rod, the lower extreme of top pull rod is connected with the cylinder, the below of cover half is located to the cylinder frame.

Further preferably, the lower part of cover half is connected with the backup pad, the lower extreme of backup pad is connected with the connecting plate, the cylinder is fixed in the below of connecting plate, realizes the installation of cylinder through backup pad and connecting plate, and can not influence the compound die operation of movable mould and cover half.

Further preferably, a guide assembly is arranged between the connecting plate and the loose piece bottom plate and used for guiding movement of the loose piece bottom plate, so that movement stability of the loose piece bottom plate is guaranteed.

Further preferably, the guide assembly comprises a guide column and a guide sleeve, the lower end of the guide column is fixed on the connecting plate, the upper end of the guide column is fixed on the fixed die, the guide sleeve is fixed on the movable block bottom plate, the guide column is movably inserted into the guide sleeve, and the movable block bottom plate is accurately and stably moved along the guide column through the arrangement of the guide column and the guide sleeve.

Further preferably, a fixing plate is arranged below the guide post, and a bolt is connected between the fixing plate and the connecting plate, so that the guide post is convenient to install and fix on the connecting plate; and a positioning column is arranged between the air cylinder and the connecting plate, so that the air cylinder is convenient to install and position.

Further preferably, the supporting plate and the connecting plate are made of heat insulating materials, so that heat transfer can be prevented, and operators can be prevented from being scalded.

Further preferably, the second heating pipe is obliquely arranged along the side wall direction of the movable block, so that the heating range of the movable block can be increased, and the heating uniformity can be improved.

Further preferably, the upper end section of the top pull rod is of a T-shaped structure, and the movable block bottom plate is provided with a T-shaped through groove for mounting the top pull rod, so that the top pull rod and the movable block bottom plate can be conveniently mounted and positioned.

Further preferably, the movable block is provided with a demoulding slope in the shape, so that the movable block and the formed sand core are conveniently demoulded.

The beneficial effects are that: according to the core-reducing core-pulling device of the hot core box die, through the arrangement of the hollow movable blocks, the load of a pumping structure can be reduced, the weight of the core-pulling device is reduced, the operation difficulty is reduced, the movable blocks can reduce the volume of a sand core cavity, the purposes of reducing sand injection quantity and saving material cost are achieved, and the weight of the sand core is reduced; the second heating pipe in the movable block is matched with the first heating pipes on the fixed die and the movable die, so that the sand core cavity can be synchronously preheated and heated, the inner wall and the outer wall of the formed sand core can be simultaneously solidified, a solidified layer is formed, and the strength of the sand core can be effectively improved; through the arrangement of the drawing structure, the movable block is automatically pushed in or pulled out, so that automatic core setting operation is realized, automatic operation is realized, potential safety hazards caused by manual operation can be avoided, and the production efficiency of the sand core is greatly improved; the core pulling device has simple structure and easy maintenance.

Drawings

FIG. 1 is a schematic view of a conventional sand core mold with metal blocks disposed therein according to the background art of the present utility model;

fig. 2 is a schematic diagram of a front view structure of a core-reducing and core-pulling device for a core of a hot core box mold according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an axial measurement structure of a core-reducing and core-pulling device of a hot core box die without a movable die according to an embodiment of the utility model;

fig. 4 is a schematic diagram of an open-mold state structure of a core weight-reducing core-pulling device of a hot core box mold according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a die assembly state structure of a core weight-reducing core-pulling device of a hot core box die according to an embodiment of the utility model.

Reference numerals: the mold comprises a 1-fixed mold, a 2-movable mold, a 3-sand core cavity, a 31-sand shooting port, a 4-movable block, a 5-movable block bottom plate, a 6-top pull rod, a 7-cylinder, an 8-supporting plate, a 9-connecting plate, a 10-first heating pipe, a 11-second heating pipe, a 12-guide post, a 13-guide sleeve, a 14-fixed plate, a 15-bolt, a 16-positioning post, a 17-sand core mold and a 18-metal block.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 2-5, the core weight-reducing core pulling device of the hot core box die is used in the core production operation, and the setting method of the movable block 4 is improved by setting a pumping structure below the movable block 4, so that the manual operation is changed into the automatic operation, and the core feeding operation is facilitated. The core pulling device comprises a fixed die 1 and a movable die 2, wherein sand core cavities 3 are formed in the fixed die 1 and the movable die 2, and the sand core is shaped through the sand core cavities 3. A sand injection port 31 is arranged above the sand core cavity 3 and is used for injecting core sand; the fixed die 1 and the movable die 2 are internally provided with first heating pipes 10 for heating the fixed die 1 and the movable die 2; the movable block 4 is arranged in the sand core cavity 3, and the movable block 4 is of a hollow structure, so that the load of a pumping structure can be reduced, the weight of the core pulling device is reduced, and the operation difficulty is reduced; simultaneously, be convenient for set up second heating pipe 11 in loose piece 4, and second heating pipe 11 sets up along the lateral wall direction slope of loose piece 4, can increase the scope of being heated of loose piece 4 and improve the degree of consistency of being heated to cooperate first heating pipe 10 on cover half 1 and the movable mould 2, can preheat and heat psammitolite die cavity 3 in step, make the interior, the outer wall of fashioned psammitolite in the psammitolite die cavity 3 can solidify simultaneously, form the solidification layer, can effectively improve the intensity of psammitolite. The below of loose piece 4 is equipped with loose piece bottom plate 5, realizes drawing the connection of structure through loose piece bottom plate 5, and drawing the structure and contain top pull rod 6, and the lower extreme of top pull rod 6 is connected with cylinder 7, and cylinder 7 erects in the below of cover half 1, can drive top pull rod 6 up-and-down motion through cylinder 7, and then can jack-in or pull out sand core die cavity 3 loose piece 4 through top pull rod 6, realizes the automated operation of loose piece 4, and then realizes automatic core setting operation, can avoid the potential safety hazard that manual operation brought.

When the movable block 4 is jacked into the sand core cavity 3, the volume of the movable block can occupy about 3/5 space of the sand core cavity 3, the sand injection quantity can be reduced under the condition of not changing the appearance of the sand core cavity 3, a sand core with light weight can be finally obtained, the unit sand injection quantity is reduced by 3/5 compared with the prior structure, and the material cost is greatly reduced; the loose piece 4 with the hollow structure is automatically pulled, so that the maintenance of the loose core device is facilitated, and the repair cost can be reduced; automatic loose core, has improved the production efficiency of psammitolite greatly.

In the utility model, a supporting plate 8 is connected below a fixed die 1, a connecting plate 9 is connected at the lower end of the supporting plate 8, and a cylinder 7 is fixed below the connecting plate 9. The installation and fixation of the cylinder 7 is achieved by means of the support plate 8 and the connection plate 9. In the utility model, the stress point of the top pull rod 6 connected with the air cylinder 7 is always positioned at the center of the die-combining surface of the moving and fixed die, so that the lifting stability of the movable block 4 is ensured, and the molding quality of the sand core is further ensured. Meanwhile, the air cylinder 7 can be skillfully arranged below the fixed die through the supporting plate 8 and the connecting plate 9, and the opening and closing actions of the movable die are not affected; the supporting plate 8 and the connecting plate 9 are made of heat insulating materials, so that high-temperature heat transfer of a die can be prevented, the molding quality of a sand core is affected, the damage of the air cylinder 7 and the scalding of fingers of operators can be prevented.

In the utility model, a guide component is arranged between the connecting plate 9 and the movable block bottom plate 5. Through the setting of guide component, can guarantee that the lift of loose piece bottom plate 5 is steady, smooth and easy, and then guarantee that the top of loose piece 4 is gone into or is pulled out smoothly. The guide assembly comprises a guide post 12 and a guide sleeve 13, wherein the lower end of the guide post 12 is fixed on the connecting plate 9, the upper end of the guide post 12 is fixed on the fixed die 1, the guide sleeve 13 is fixed on the movable block bottom plate 5, the guide post 12 is movably inserted into the guide sleeve 13, and the movable block bottom plate 5 connected with the guide sleeve 13 can accurately move along the guide post 12 through the cooperation of the guide post 12 and the guide sleeve 13. Wherein, be equipped with the guiding hole of uide bushing 13 installation on the loose piece bottom plate 5, can make things convenient for the change of uide bushing 13. A fixing plate 14 is arranged below the guide post 12, a bolt 15 is connected between the fixing plate 14 and the connecting plate 9, and the fixing plate 14 is conveniently connected by the bolt 15 through the arrangement of the fixing plate 14, so that the guide post 12 is conveniently fixed; a positioning column 16 is arranged between the air cylinder 7 and the connecting plate 9, so that the air cylinder 7 is convenient to install and position.

In the utility model, the upper end section of the top pull rod 6 is of a T-shaped structure, and the movable block bottom plate 5 is provided with a T-shaped through groove, so that the installation and the positioning of the top pull rod 6 are facilitated.

In the utility model, the appearance of the loose piece 4 is provided with the demoulding inclination, so that the demoulding operation of the loose piece 4 is facilitated, wherein the demoulding inclination of the core pulling device is 8 degrees.

In the utility model, the operation flow of the core pulling device is as follows:

1) And (3) die assembly: the movable die 2 moves towards the fixed die 1 and is tightly combined;

2) Top block: the movable block 4 moves upwards along with the air cylinder 7 and enters the sand core cavity 3, and the movable block bottom plate 5 is tightly attached to the lower ends of the fixed die 1 and the movable die 2;

3) Sand shooting: the core sand is injected into the sand core cavity 3 from the sand injection port 31 from top to bottom, and then solidified and molded;

4) Core pulling: the cylinder 7 drives the movable block 4 to move downwards through the top pull rod 6 and is separated from the formed sand core;

5) And (5) die sinking: the movable mould 2 is separated from the fixed mould 1;

6) Core tapping: the fixed mould ejector rod of the sand core device ejects the sand core.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the summary of the present utility model within the scope of the present utility model.

Claims

1. The utility model provides a hot core box mould psammitolite subtracts heavy core pulling device, includes cover half (1) and movable mould (2), all be equipped with psammitolite die cavity (3) on cover half (1) and the movable mould (2), the top of psammitolite die cavity (3) is equipped with and shoots sand mouth (31), all be equipped with first heating pipe (10) in cover half (1) and the movable mould (2), be equipped with loose piece (4) in psammitolite die cavity (3), its characterized in that: the movable block (4) is of a hollow structure, a second heating pipe (11) is arranged in the hollow structure, a movable block bottom plate (5) is arranged below the movable block (4), a drawing structure is arranged below the movable block bottom plate (5), the drawing structure comprises a top pull rod (6), the lower end of the top pull rod (6) is connected with an air cylinder (7), and the air cylinder (7) is erected below the fixed die (1).

2. The hot core box mold sand core weight-reducing core pulling device according to claim 1, wherein the core pulling device is characterized in that: the lower part of cover half (1) is connected with backup pad (8), the lower extreme of backup pad (8) is connected with connecting plate (9), cylinder (7) are fixed in the below of connecting plate (9).

3. The core-reducing and core-pulling device for a hot core box die sand core according to claim 2, wherein the core-reducing and core-pulling device is characterized in that: a guide component is arranged between the connecting plate (9) and the movable block bottom plate (5).

4. The core-reducing and core-pulling device for a hot core box die sand core according to claim 3, wherein the core-reducing and core-pulling device is characterized in that: the guide assembly comprises a guide column (12) and a guide sleeve (13), wherein the lower end of the guide column (12) is fixed on the connecting plate (9), the upper end of the guide column (12) is fixed on the fixed die (1), the guide sleeve (13) is fixed on the movable block bottom plate (5), and the guide column (12) is movably inserted in the guide sleeve (13).

5. The core-reducing and core-pulling device for a sand core of a hot core box die according to claim 4, wherein the core-reducing and core-pulling device is characterized in that: the lower part of the guide post (12) is provided with a fixed plate (14), a bolt (15) is connected between the fixed plate (14) and the connecting plate (9), and a positioning post (16) is arranged between the air cylinder (7) and the connecting plate (9).

6. The core-reducing and core-pulling device for a hot core box die sand core according to claim 2, wherein the core-reducing and core-pulling device is characterized in that: the supporting plate (8) and the connecting plate (9) are made of heat insulation materials.

7. The hot core box mold sand core weight-reducing core pulling device according to claim 1, wherein the core pulling device is characterized in that: the second heating pipe (11) is obliquely arranged along the side wall direction of the movable block (4).

8. The hot core box mold sand core weight-reducing core pulling device according to claim 1, wherein the core pulling device is characterized in that: the section of the upper end of the top pull rod (6) is of a T-shaped structure, and a T-shaped through groove for installing the top pull rod (6) is formed in the movable block bottom plate (5).

9. The hot core box mold sand core weight-reducing core pulling device according to claim 1, wherein the core pulling device is characterized in that: the movable block (4) is provided with a demoulding inclination in appearance.