Self-locking gate device for casting

Abstract

A self-locking gate device for casting, belonging to the field of casting technology, is used to solve the problem of loose connection between a gate basin and a gate seat, including a gate basin and a gate seat, one end of the gate basin connected to the gate seat is provided with a connecting section, the connecting section is composed of a first inclined surface tilted outward at an angle of α relative to the surface where the axis of the gate basin is located, two second inclined surfaces intersecting with the first inclined surface tilted inward at an angle of θ relative to the surface where the axis of the gate basin is located, and a third inclined surface intersecting with the other ends of the two second inclined surfaces and tilted inward relative to the surface where the axis of the gate basin is located, and the two second inclined surfaces intersect in the extension direction of the third inclined surface; a self-locking structure that cooperates with the connecting section is provided on the gate seat, and the inner side wall of the self-locking structure is the same as the outer contour of the connecting section. The gate basin is fixed in the vertical direction, avoiding the problems of the gate basin floating, metal liquid cannon fire, and choking caused by the gate basin being lifted by the molten metal.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to a pouring basin for casting. Background Art

[0002] Casting refers to a method of manufacturing castings by melting solid metal into liquid form and pouring it into a mold of a specific shape, waiting for it to solidify and form. Sand casting refers to a method of producing castings in a sand mold. In this process, the pouring basin plays the role of draining the molten metal into the sand mold. The existing production method is to stick the pouring basin and the sand mold together with a binder.

[0003] During the sand casting process, the pouring basin resists the buoyancy of the molten metal by its own gravity and the bonding force between it and the sand mold. When the buoyancy of the molten metal is greater than the deadweight of the pouring basin and the bonding force between it and the sand mold, the pouring basin will be separated from the sand mold under the action of the buoyancy of the molten metal, causing the bottom of the pouring basin to be blasted, making it impossible to cast the casting normally. On the other hand, the pouring basin connection process of bonding the pouring basin to the sand mold is labor-intensive and inefficient. At the same time, during the transportation of the core package after the core is assembled, the pouring basin may be collided and separated from the top of the core package. At the same time, since the pouring basin and the core package are bonded with an adhesive, when the molten metal flows through the bottom of the pouring basin, the adhesive vaporizes at high temperature, and gas enters the molten metal, causing possible pore defects in the casting of the casting. Summary of the invention

[0004] In view of the problems of insufficient connection force between the pouring basin and the core package caused by setting the pouring basin on the core package in the bonding manner and the entry of volatile gases in the adhesive into the molten metal when exposed to high temperature, it is necessary to propose a self-locking pouring device for casting, which is connected to the core package by snap-on connection, thereby solving the above problems.

[0005] A self-locking gate device for casting, comprising a gate basin and a gate seat, wherein one end of the gate basin connected to the gate seat is provided with a connecting section, wherein the connecting section is composed of a first inclined surface inclined outwardly at an angle α relative to the surface where the axis of the gate basin is located, two second inclined surfaces inclined inwardly at an angle θ relative to the surface where the axis of the gate basin is located and intersecting with the first inclined surface, and a third inclined surface intersecting with the other ends of the two second inclined surfaces and inclined inwardly relative to the surface where the axis of the gate basin is located, wherein the two second inclined surfaces intersect in the extension direction of the third inclined surface; a self-locking structure cooperating with the connecting section is provided on the gate seat, and the inner side wall of the self-locking structure is the same as the outer contour of the connecting section; the matching and hanging of the gate basin and the gate seat are realized, and the hanging is realized by the connecting section having the second inclined surface and the self-locking structure.

[0006] Furthermore, the connecting section is composed of a first inclined plane, two second inclined planes and a third inclined plane, one end of the two second inclined planes intersects with the first inclined plane, and the other end intersects with the third inclined plane, thereby forming the connecting section with a continuous external contour, the first inclined plane is tilted outwardly at an angle α relative to the plane where the axis of the pouring basin is located; the third inclined plane is tilted inwardly at an angle θ relative to the plane where the axis of the pouring basin is located, that is, the extended surfaces of the two second inclined planes intersect with the plane where the axis of the pouring basin is located; the extended surfaces of the two second inclined planes in the direction of the third inclined plane intersect, and the angle between the two second inclined planes is an angle β. That is, the cross section of the connecting section parallel to the axis of the pouring basin is a trapezoid, and the area of ​​the trapezoid decreases from the first inclined plane to the third inclined plane. At this point, the connecting section forms a structure that is small at the top and large at the bottom, and tilts toward one end, realizing a vertical hanging force or a resistance that can counteract the buoyancy of the molten metal.

[0007] Furthermore, the third inclined surface is parallel to the first inclined surface, that is, the third inclined surface is inclined inwardly at an angle α relative to the plane where the axis of the pouring basin is located.

[0008] Furthermore, a gap of 0.5 mm to 1 mm is provided between the inner side wall of the self-locking structure and the outer contour of the connecting section to facilitate the fit between the two.

[0009] Furthermore, a hanging structure is provided at one end of the third inclined surface of the connecting section away from the pouring basin, and the hanging structure is used to form a hanging force between the pouring basin and the pouring seat, so as to prevent the buoyancy of the molten metal during the casting process from separating the pouring basin from the pouring seat and causing problems such as fire.

[0010] Furthermore, the gate seat is made of molding sand, which facilitates the removal of the gate basin after casting. That is, after being baked by high-temperature molten metal, the gate seat made of molding sand has a certain degree of disintegration, thereby conveniently separating the gate basin from the gate seat.

[0011] The beneficial effect of the technical solution of the present invention is as follows: by arranging the connecting section with the first inclined surface and the second inclined surface and cooperating with the self-locking structure arranged on the gate seat, the purpose of fixing the gate basin in the vertical direction is achieved, thereby avoiding the problems of the gate basin floating, the molten metal cannon fire, the choking, etc. caused by the gate basin being lifted by the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a pouring basin structure;

[0013] Figure 2 It is a schematic diagram of a connecting segment structure;

[0014] Figure 3It is a schematic diagram of the matching state of the pouring basin and the pouring seat, and the arrow in the figure indicates the installation direction of the pouring basin;

[0015] Among them, 1- pouring basin; 2- pouring seat; 3- connecting section; 301- first inclined surface; 302- second inclined surface; 303- third inclined surface. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solution of the present invention, the technical solution of the invention content is described in detail in conjunction with the accompanying drawings. Obviously, the following descriptions are some typical embodiments of the present invention. For ordinary technicians in this field, other solutions can be obtained based on these embodiments without paying creative work.

[0017] In order to solve the problem that the existing pouring basin and pouring seat are directly connected in the vertical direction and cannot effectively counteract the vertical upward buoyancy of the molten metal, the present invention provides a self-locking pouring device for sand casting.

[0018] The present invention provides a self-locking gate device for sand casting, comprising a gate basin 1 and a gate seat 2, wherein one end of the gate basin 1 connected to the gate seat 2 is provided with a connecting section 3, wherein the connecting section 3 is composed of a first inclined surface 301 inclined outwardly at an angle α relative to the plane where the axis of the gate basin 1 is located, two second inclined surfaces 302 inclined inwardly at an angle θ relative to the plane where the axis of the gate basin 1 is located and intersecting with the first inclined surface 301, and a third inclined surface 303 intersecting with the other ends of the two second inclined surfaces 302 and parallel to the first inclined surface 301, wherein the two second inclined surfaces 302 intersect in the extension direction of the third inclined surface 303; that is, from another perspective, the cross section of the connecting section 3 is from the first inclined surface to the third inclined surface 303. 301 is a trapezoid with decreasing area toward the third inclined surface 303, and the upper bottom surface with shorter sides is connected to the pouring basin 1, so as to form a pouring basin 1 with a connecting section 3 that is small at the top and large at the bottom and has a self-locking function, that is, the end face shape of one end of the connecting section 3 connected to the pouring basin 1 is the same as the end face shape of the pouring basin 1, so as to achieve a good connection between the two; the pouring seat 2 is provided with a self-locking structure that cooperates with the connecting section 3, and the inner side wall of the self-locking structure is the same as the outer contour of the connecting section 3; the cooperation and hanging of the pouring basin 1 and the pouring seat 2 are realized, and the hanging is realized by the connecting section 3 with the second inclined surface 302 and the self-locking structure.

[0019] The height of the connecting section 3 in the vertical direction is Where ρ is the density of the molten metal, g is the acceleration due to gravity, and h is the 浇 is the height of the pouring basin 1, A 底 is the contact area at the bottom of the gate basin 1, G 浇is the weight of the pouring basin 1, σ is the allowable tensile stress of the sand mold, l is the length of the single-sided self-locking structure, and f is the safety factor; and the optimal vertical height of the connecting section 3 is Thus, the buoyancy during the pouring of the molten metal can be effectively resisted. The greater the vertical height of the connecting section 3, the greater the shear stress caused by the buoyancy of the molten metal minus the gravity of the pouring basin 1, and the safer the pouring basin 1. Specifically, in this embodiment, the height of the connecting section 3 is 30 mm.

[0020] The depth of the self-locking structure in the vertical direction is equal to the height of the connecting section 3 in the vertical direction, that is, the depth of the self-locking structure in the vertical direction is Where ρ is the density of the molten metal, g is the acceleration due to gravity, and h is the 浇 is the height of the pouring basin 1, A 底 is the contact area at the bottom of the gate basin 1, G 浇 is the weight of the pouring basin 1, σ is the allowable tensile stress of the sand mold, l is the length of the unilateral self-locking structure, and f is the safety factor; and the optimal vertical depth of the self-locking structure is Thereby, the hooking force can be effectively provided, that is, the connecting section 3 can be effectively accommodated, so that the hooking force of the two parts in cooperation with each other reaches an optimal state. Specifically, in this embodiment, the depth of the self-locking structure in the vertical direction is 30 mm.

[0021] The angle α of the first inclined surface 301 of the connecting section 3 is the inclination angle and inclined surface of the connecting section 3 entering the self-locking structure, thereby facilitating the connecting piece with a small upper and large lower structure to enter the self-locking structure and achieving a good self-locking effect in the vertical direction.

[0022] The connecting section 3 has two second inclined surfaces 302 intersecting in the direction of the third inclined surface 303, and the two second inclined surfaces 302 have the angle θ relative to the plane where the axis of the pouring basin 1 is located, and the angle θ enables the second inclined surface 302 to have a vertical upward hanging force, and the angle θ is Spend Wherein, μ is the friction coefficient between the sand molds, β is the angle between the two second inclined surfaces 302; and the optimal angle value of the angle θ is Theoretically, the larger the angle θ is, that is, the flatter the inner side wall of the self-locking structure is, the greater the hooking force that can be achieved or provided, that is, the greater the buoyancy of the molten metal that can be resisted. In this embodiment, the angle α is 40 degrees, the angle β is 24 degrees, and the angle θ is 12 degrees, thereby achieving the optimal hooking force and the most convenient assembly effect, that is, the pouring basin 1 can be most conveniently connected to the pouring seat 2 through the connecting section 3.

[0023] As an optimization of this embodiment, a hanging structure is further provided at one end of the third inclined surface 303 of the connecting section 3 away from the pouring basin 1. The hanging structure is embodied as a tilted end in this embodiment, so as to lock and position the pouring basin 1 in the horizontal direction. More preferably, in order to enhance the force for fixing the pouring basin 1 in the horizontal direction, a card interface is further provided at the position where the self-locking structure and the hanging structure cooperate with each other, and the card interface cooperates with the hanging structure to form locking and positioning in the horizontal direction.

[0024] Through the implementation of this technical solution, the pouring basin located on the pouring basin seat has a locking force in the vertical upward direction and a locking force in the horizontal direction, thereby realizing a self-locking pouring gate device for casting, avoiding the need to bond the pouring basin to the pouring basin seat, resulting in the entry of adhesive vapor into the molten metal and causing various problems such as air holes in the casting, floating of the pouring basin due to adhesive failure, and molten metal cannon fire.

[0025] The above embodiment is only a description of a typical application of the technical solution of the present invention, and reasonable expansion can be carried out on a reasonable basis without requiring creative work.

Claims

1. A self-locking gate device for casting, characterized in that: It comprises a pouring basin and a pouring seat, wherein one end of the pouring basin connected to the pouring seat is provided with a connecting section, wherein the connecting section is composed of a first inclined surface inclined outwardly at an angle α relative to the surface where the axis of the pouring basin is located, two second inclined surfaces intersecting with the first inclined surface and inclined inwardly at an angle θ relative to the surface where the axis of the pouring basin is located, and a third inclined surface intersecting with the other ends of the two second inclined surfaces and inclined inwardly relative to the surface where the axis of the pouring basin is located, wherein the two second inclined surfaces intersect in the extension direction of the third inclined surface; a self-locking structure cooperating with the connecting section is provided on the pouring seat, wherein the inner side wall of the self-locking structure is the same as the outer contour of the connecting section; The angle θ is Spend degrees, μ is the friction coefficient between the sand molds, and β is the angle between the two second inclined surfaces.

2. The self-locking gate device for casting according to claim 1, characterized in that: The third inclined surface is parallel to the first inclined surface.

3. The self-locking gate device for casting according to claim 2, characterized in that: A gap of 0.5 mm to 1 mm is provided between the inner side wall of the self-locking structure and the outer contour of the connecting section.

4. The self-locking gate device for casting according to claim 1, characterized in that: The height of the connecting section in the vertical direction is ρ is the density of the molten metal, g is the acceleration due to gravity, h is 浇 is the height of the pouring basin, A 底 is the contact area of ​​the bottom of the gate basin, G 浇 is the weight of the pouring basin, σ is the allowable tensile stress of the sand mold, l is the length of the single-sided self-locking structure, and f is the safety factor.

5. The self-locking gate device for casting according to claim 1, characterized in that: The depth of the self-locking structure in the vertical direction is ρ is the density of the molten metal, g is the acceleration due to gravity, h is 浇 is the height of the pouring basin, A 底 is the contact area of ​​the bottom of the gate basin, G 浇 is the weight of the pouring basin, σ is the allowable tensile stress of the sand mold, l is the length of the single-sided self-locking structure, and f is the safety factor.

6. The self-locking gate device for casting according to claim 1, characterized in that: A hanging structure is provided at one end of the third inclined surface of the connecting section away from the pouring basin.

7. The self-locking gate device for casting according to claim 6, characterized in that: A card interface is provided at the position where the self-locking structure and the hanging structure cooperate with each other, and the card interface and the hanging structure cooperate with each other to play a locking role in the horizontal direction.

8. The self-locking gate device for casting according to claim 1, characterized in that: The gate seat is made of molding sand.

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