Sand shooting head, sand shooting device and core shooting machine
By setting up a projection and a straight section in the sand injection cavity of the sand injection head, the problem of insufficient sand injection pressure is solved, and the compact forming of the large-volume sand core is achieved, which reduces the occurrence of dead sand and material shortages, and improves the The finished product quality of the sand core.
Patent Information
- Application Number
- CN202420165726.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-01-23
AI Technical Summary
When making large-volume sand cores, the sand injection pressure is insufficient, resulting in shortage of material and dead sand at the end of the sand core. In severe cases, waste products are generated, especially at the ends farther away from the center of the sand injection cavity, which is more likely to appear dead sand. question.
The raised portion is provided in the sand injection cavity of the sand injection head to reduce the volume of the sand injection cavity. By gradually reducing the thickness of the raised portion, a four-edge platform-type sand injection cavity and a straight cylinder are formed by gradually reducing the thickness of the raised portion from the sand inlet to the sand outlet. To ensure sufficient sand injection pressure and reduce the generation of dead sand.
The compactness of the sand injection is improved, the occurrence of material shortage at the end of the sand core is reduced, the molding quality of the large-volume sand core is ensured, the possibility of dead sand is reduced, and the sand injection pressure is increased.
Smart Images
Figure CN222359227U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of sand core preparation, and in particular to a sand shooting head, a sand shooting device and a core shooting machine. Background Art
[0002] The core shooting machine uses compressed air to evenly shoot the core sand into the sand core mold for pre-tightening, and then applies pressure to compact it to obtain a sand core; specifically, the core sand passes through the sand shooting head and the sand shooting nozzle on the sand shooting plate 4 to shoot sand into the sand core mold to form a sand core. Figure 1 As shown, the sand blasting head includes a shell 1, a sand blasting chamber 11 is formed in the shell 1, and a sand inlet 12 and a sand outlet 13 connected to the sand blasting chamber 11 are respectively formed on opposite sides of the shell 1. The sand inlet 12 of the shell 1 is connected to the sand blasting barrel 3, and the sand outlet 13 is connected to the sand blasting plate 4.
[0003] At present, for sand cores with heavy weight and large volume, although the amount of sand in the sand shooting barrel 3 is sufficient, the amount of sand in the sand shooting barrel 3 is basically the same as the weight of the sand core. Due to space and tooling structure limitations, the volume of the sand shooting barrel 3 cannot be expanded, resulting in the sand height after sand shooting being lower than the bottom surface of the sand shooting barrel 3, resulting in a core sand cavity, resulting in insufficient sand shooting pressure, especially for the end of the sand core far away from the center of the sand shooting cavity 11, it is more likely to produce dead sand due to insufficient sand shooting pressure, thereby causing the sand shooting to be loose due to less sand. In severe cases, the end of the sand core is short of material and waste is generated. Utility Model Content
[0004] In view of the problems existing in the background technology, the present application provides a sand shooting head, a sand shooting device and a core shooting machine. The sand shooting head can increase the sand shooting pressure, reduce the possibility of dead sand in the sand shooting chamber, increase the compactness of the sand shooting, and improve the molding quality of the sand core.
[0005] According to a first aspect of the utility model, a sandblasting head is provided, comprising:
[0006] A shell, wherein a sand shooting cavity is formed in the shell, and a sand inlet and a sand outlet communicated with the sand shooting cavity are respectively formed on opposite sides of the shell, and the cross-sectional area of the sand shooting cavity gradually increases from the sand inlet to the sand outlet;
[0007] The raised portion is arranged on the cavity wall of the sand shooting cavity.
[0008] In some embodiments of the present invention, the thickness of the raised portion gradually decreases from the middle of the sand shooting cavity toward the sand inlet and / or the sand outlet.
[0009] In some embodiments of the present invention, the thickness of the raised portion decreases linearly from the middle of the sand shooting cavity toward the sand inlet and the sand outlet.
[0010] In some embodiments of the present invention, the thickness of the protrusion decreases in a parabolic shape from the middle of the sand shooting cavity toward the sand inlet and the sand outlet.
[0011] In some embodiments of the present invention, the sand shooting chamber is in the shape of a quadrangular pyramid.
[0012] In some embodiments of the present invention, a straight section is formed at one end of the sand shooting chamber close to the sand outlet.
[0013] In some embodiments of the present invention, the straight tube section is seamlessly connected to the raised portion.
[0014] According to a second aspect of the utility model, a sand shooting device is provided, comprising a sand shooting bucket, a sand shooting plate and the above-mentioned sand shooting head.
[0015] In some embodiments of the present invention, a sand storage cavity is formed in the sand shooting bucket, and a sand replenishing port and a sand releasing port communicating with the sand storage cavity are respectively formed on opposite sides of the sand shooting bucket, and the sand releasing port is communicated with the sand inlet.
[0016] According to a third aspect of the utility model, a core shooting machine is provided, comprising the above-mentioned sand shooting device.
[0017] The embodiment of the present application provides a sand shooting head, which reduces the volume of the sand shooting chamber and the amount of core sand thereof by arranging a protrusion in the sand shooting chamber. Therefore, when making large-volume sand cores, the possibility of the sand height after sand shooting being lower than the bottom surface of the sand shooting barrel can be reduced, the formation of core sand cavities can be prevented, the sand shooting pressure can be ensured, and the generation of dead sand in the sand shooting chamber, especially at a position far from the center thereof, can be reduced, thereby improving the compactness of the sand shooting, improving the molding quality of the sand core, and realizing the production of large-volume sand cores. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0019] Figure 1 It is a structural schematic diagram of a current sand-shooting device;
[0020] Figure 2 It is a schematic diagram of the overall structure of the sand-shooting head of the present application;
[0021] Figure 3 is a cross-sectional view of the sand-shooting head of the present application;
[0022] Figure 4It is a schematic diagram of the overall structure of the sand shooting device of the present application.
[0023] The reference numerals in the accompanying drawings indicate the following: 1. shell; 11. sand shooting chamber; 12. sand inlet; 13. sand outlet; 14. straight tube section; 2. raised portion; 3. sand shooting barrel; 4. sand shooting plate. DETAILED DESCRIPTION
[0024] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0025] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.
[0026] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.
[0027] The sand shooting head, sand shooting device and core shooting machine provided in the embodiments of the present application are described below in conjunction with the accompanying drawings.
[0028] The present application embodiment discloses a sandblasting head. Figure 2 and Figure 3 As shown, the sand blasting head includes a shell 1 and a protrusion 2; wherein, a sand blasting cavity 11 is formed in the shell 1, and a sand inlet 12 and a sand outlet 13 connected to the sand blasting cavity 11 are respectively formed on opposite sides of the shell 1, and the cross-sectional area of the sand blasting cavity 11 gradually increases from the sand inlet 12 to the sand outlet 13; the protrusion 2 is arranged on the cavity wall of the sand blasting cavity 11.
[0029] By using the sand shooting head in the technical solution and arranging the protrusion 2 in the sand shooting cavity 11, the volume of the sand shooting cavity 11 can be reduced, and the amount of core sand can be reduced. Therefore, when making large-volume sand cores, the possibility of the sand height after sand shooting being lower than the bottom surface of the sand shooting barrel 3 can be reduced, and the formation of core sand cavities can be prevented. The sand shooting pressure is ensured, and the generation of dead sand in the sand shooting cavity 11, especially at a position far from its center, is reduced, thereby improving the compactness of the sand shooting, improving the molding quality of the sand core, and realizing the production of large-volume sand cores.
[0030] In some embodiments of the present invention, Figure 3 As shown, the thickness of the protrusion 2 gradually decreases from the middle of the sand shooting cavity 11 toward the sand inlet 12 and / or the sand outlet 13 .
[0031] For example, the thickness of the raised portion 2 gradually decreases from the middle of the sand shooting cavity 11 to the direction of the sand inlet 12, the thickness of the raised portion 2 gradually decreases from the middle of the sand shooting cavity 11 to the direction of the sand outlet 13, and the thickness of the raised portion 2 gradually decreases from the middle of the sand shooting cavity 11 to the directions of the sand inlet 12 and the sand outlet 13 respectively.
[0032] In the present embodiment, the thickness of the raised portion 2 is gradually thinned from the middle of the sand shooting chamber 11 toward the sand inlet 12 and the sand outlet 13, respectively. This can not only ensure that the sand amount in the sand shooting bucket 3 is sufficient, but also fill the dead corners to the greatest extent, ensuring that there is no dead sand storage space. The inclined surface formed by the gradual thinning of the raised portion 2 can well transfer the sand shooting pressure layer by layer from top to bottom, which will further ensure that the pressure in each area of the sand shooting chamber 11 is sufficient, and finally realize continuous and efficient sand replenishment to the end of the sand core.
[0033] Furthermore, if Figure 3 As shown, the thickness of the protrusion 2 can be linearly thinned from the middle of the sand shooting cavity 11 toward the sand inlet 12 and the sand outlet 13, respectively, to form a protrusion 2 with an approximately inverted triangle surface.
[0034] In other embodiments, the thickness of the raised portion 2 may be reduced in a parabolic shape from the middle of the sand shooting cavity 11 toward the sand inlet 12 and the sand outlet 13 , respectively, to form a raised portion 2 having an approximately arched surface.
[0035] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the sand shooting chamber 11 is in the shape of a quadrangular pyramid.
[0036] It should be noted that the top and bottom surfaces of the tetrahedral pyramid are both rectangular, and the length of the top surface is smaller than the length of the bottom surface, the width of the top surface is smaller than the width of the bottom surface, and there are two opposite first trapezoidal surfaces and two opposite second trapezoidal surfaces between the top and bottom surfaces, the upper base and lower base of the first trapezoidal surface are the long side of the top surface and the long side of the bottom surface respectively, and the upper base and lower base of the second trapezoidal surface are the short side of the top surface and the short side of the bottom surface respectively.
[0037] In this embodiment, the sand inlet 12 is disposed at the middle position of the top surface of the quadrangular pyramid-shaped sand shooting chamber 11 , and the sand outlet 13 is disposed on the entire bottom surface of the quadrangular pyramid-shaped sand shooting chamber 11 .
[0038] Furthermore, one protrusion 2 is provided on each of the two second trapezoidal surfaces of the quadrangular pyramid-shaped sand-shooting chamber 11 .
[0039] Furthermore, the raised portion 2 and the shell 1 can adopt an integrally formed structure; or, the raised portion 2 can also be detachably connected to the inner wall of the shell 1 by means of bolts or the like, so that the size of the raised portion 2 can be selected and installed according to the size of the prepared sand core.
[0040] In some embodiments of the present invention, Figure 3 As shown, a straight tube section 14 is formed at one end of the sand shooting chamber 11 close to the sand outlet 13 .
[0041] The position where the sand shooting head contacts the sand shooting plate 4 uses a vertical transition, which can maximize the capacity of the space closest to the sand shooting plate 4, ensure that the core sand has sufficient flow space, reduce flow resistance, and further enrich the sand core.
[0042] In this embodiment, the straight tube section 14 is seamlessly connected with the raised portion 2, further ensuring that there is no dead sand storage space.
[0043] The present application also provides a sand shooting device, such as Figure 4 As shown, the sand shooting device comprises a sand shooting bucket 3, a sand shooting plate 4 and the above-mentioned sand shooting head.
[0044] A sand storage cavity is formed in the sand shooting barrel 3 , and a sand replenishing port and a sand releasing port communicating with the sand storage cavity are respectively formed on opposite sides of the sand shooting barrel 3 , and the sand releasing port is communicated with the sand inlet 12 .
[0045] The molding sand is replenished into the sand storage cavity through the sand replenishing port, and during the sand shooting, the molding sand is continuously transported into the sand shooting cavity 11 through the sand discharge port and the sand inlet 12 .
[0046] The embodiment of the present application further provides a core shooting machine, which includes the above-mentioned sand shooting device.
[0047] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A sandblasting head, characterized in that: include: A shell, wherein a sand shooting cavity is formed in the shell, and a sand inlet and a sand outlet communicated with the sand shooting cavity are respectively formed on opposite sides of the shell, and the cross-sectional area of the sand shooting cavity gradually increases from the sand inlet to the sand outlet; The raised portion is arranged on the cavity wall of the sand shooting cavity.
2. The sandblasting head according to claim 1, characterized in that: The thickness of the raised portion gradually decreases from the middle of the sand shooting cavity toward the sand inlet and / or the sand outlet.
3. The sandblasting head according to claim 2, characterized in that: The thickness of the protrusion decreases linearly from the middle of the sand shooting cavity toward the sand inlet and the sand outlet.
4. The sandblasting head according to claim 2, characterized in that: The thickness of the protrusion decreases in a parabolic shape from the middle of the sand shooting cavity toward the sand inlet and the sand outlet.
5. The sandblasting head according to any one of claims 1 to 4, characterized in that: The sand shooting chamber is in the shape of a quadrangular pyramid.
6. The sandblasting head according to any one of claims 1 to 4, characterized in that: A straight tube section is formed at one end of the sand shooting chamber close to the sand outlet.
7. The sandblasting head according to claim 6, characterized in that: The straight tube section is seamlessly connected with the raised portion.
8. A sand shooting device, characterized in that: The invention comprises a sand blasting bucket, a sand blasting plate and a sand blasting head as claimed in any one of claims 1 to 7.
9. The sand-shooting device according to claim 8, characterized in that: A sand storage cavity is formed in the sand shooting barrel, and a sand replenishing port and a sand releasing port communicating with the sand storage cavity are respectively formed on opposite sides of the sand shooting barrel, and the sand releasing port is communicated with the sand inlet.
10. A core shooting machine, characterized in that: It comprises the sand-shooting device as claimed in claim 8 or 9.