Rain core box
By adding a venting hole structure on the upper template of the cold rain shower core, the problem of false sand in the cold rain shower core under high resin content is solved, the compactness of the cold rain shower core is improved and the scrap rate is reduced.
Patent Information
- Application Number
- CN202422475709.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-12
AI Technical Summary
Existing cold rain cores are prone to virtual sand under conditions of high resin content, resulting in unqualified wheel quality and high scrap rate.
Add an exhaust hole structure to the upper template of the cold rain shower core, especially open exhaust holes on the three sides of the central triangular hole, increase the diameter of the exhaust hole and widen the exhaust strip to enhance the exhaust effect.
It effectively reduces or eliminates the phenomenon of false sand in the cold rain shower core, improves the compactness of the cold rain shower core, and reduces the scrap rate.
Smart Images
Figure CN223368134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shower casting, in particular to a shower core box. Background Art
[0002] Currently, cold core machines are used to manufacture cold shower cores. Twelve evenly spaced inverted conical holes serve as shower gates for wheel casting. The strength and compactness of the cold shower core significantly impact wheel quality. Any presence of loose sand in the shower core can easily lead to wheel inclusion rejection. Cold shower cores use a two-component resin binder. While conventional cold resin sand typically contains 1.5-1.8% of the sand weight, our company requires a resin content of 2.8-3.3% to meet wheel production quality requirements. This high resin content can easily lead to loose sand in the cold shower core during sand injection. Utility Model Content
[0003] The utility model aims to provide a shower core box, which can reduce the phenomenon of cold shower core empty sand and reduce the shower core scrap rate on the basis that the resin content of cold resin sand is (2.8-3.3)% of the sand weight.
[0004] The technical solution of the present utility model is achieved as follows:
[0005] A shower core box, comprising a box body, the box body comprising a cold shower core upper template, a plurality of cold shower core cavities provided in the box body, the cold shower core cavities being used to produce the cold shower cores, and a plurality of shower hole model holes being evenly formed on the cold shower core upper template for forming shower holes on the cold shower core;
[0006] An exhaust hole structure is respectively provided on the three sides of the cold rain shower core template corresponding to the central triangular hole. The exhaust hole structure includes an exhaust hole and an exhaust plug hole located at the outer end of the exhaust hole. The exhaust plug hole is coaxially arranged with the exhaust hole, and the diameter of the exhaust plug hole is larger than the diameter of the exhaust hole. The exhaust plug hole is used to install an exhaust plug.
[0007] Furthermore, the diameter of the exhaust hole ranges from 12 to 18 mm.
[0008] Furthermore, the diameter of the exhaust hole is in the range of 16 mm.
[0009] Furthermore, the exhaust plug is a cap-shaped structure, and the longitudinal section of the exhaust plug is door-shaped, and the side wall thickness of the exhaust plug is 1.2 mm.
[0010] Furthermore, the central portion of the upper template of the cold rain shower core is a central block, and three evenly distributed and mutually intersecting exhaust slits are formed on the inner side surface of the central block.
[0011] Furthermore, the width of the exhaust slit ranges from 28 to 36 mm.
[0012] Furthermore, the width of the exhaust slit is 32 mm.
[0013] Furthermore, the box body also includes a cold floating core upper template, and three cold rain shower core cavities and one cold floating core cavity are further provided in the box body. The three cold rain shower core cavities and one cold floating core cavity are distributed in a rectangular shape, and the cold rain shower core upper templates are arranged in a one-to-one correspondence with the cold rain shower core cavities. The cold floating core upper templates are arranged corresponding to the cold floating core cavities, and the cold floating core upper templates are evenly provided with multiple exhaust hole structures.
[0014] Furthermore, the cold shower core upper template is evenly provided with 12 shower hole model holes and two circles of exhaust hole structures along its central axis, wherein the first circle of exhaust hole structure and the second circle of exhaust hole structure respectively include 12 of the exhaust hole structures, and the first circle of exhaust hole structure and the second circle of exhaust hole structure are respectively located in the inner circle and outer circle of the shower hole model hole.
[0015] Furthermore, the exhaust hole structures in the first circle of exhaust hole structures and the exhaust hole structures in the second circle of exhaust hole structures are arranged alternately;
[0016] Furthermore, the molded cold rain shower core comprises a disc body, a central triangular hole is opened at the center of the disc body, and the triangular part of the central triangular hole is chamfered;
[0017] The disc body is also provided with a plurality of shower holes, which serve as shower gates when the wheel is cast.
[0018] Compared with the prior art, the beneficial effects of the present invention are:
[0019] The present application provides exhaust hole structures on the three sides of the cold rain shower core template corresponding to the central triangular hole. Since the three sides of the central triangle of the cold rain shower core are prone to false sand, the exhaust hole structure is added to the places where false sand is likely to appear, which can increase exhaust. After this improvement, the edge part of the central triangular hole of the cold rain shower core and its surrounding area are basically free of false sand, which reduces or eliminates the false sand phenomenon of the cold rain shower core, increases the compactness of the cold rain shower core, and reduces the scrap rate of the rain shower core. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is a structural diagram of a rain shower core box according to an embodiment of the present utility model;
[0022] Figure 2 This is a structural diagram of the upper template of the cold rain shower core according to an embodiment of the present utility model;
[0023] Figure 3 This is a structural diagram of the cold floating core upper template of the embodiment of the utility model;
[0024] Figure 4 This is a schematic cross-sectional view of the exhaust hole structure of an embodiment of the present utility model;
[0025] Figure 5 It is a schematic diagram of the block structure in an embodiment of the present utility model.
[0026] In the picture:
[0027] 1-box body;
[0028] 2-Cold rain core template;
[0029] 3- Cold floating core upper template;
[0030] 4-Rain shower hole model hole;
[0031] 5-exhaust hole structure; 501-exhaust plug hole; 502-exhaust hole;
[0032] 5a-center exhaust hole; 5b-inner ring exhaust hole; 5c-outer ring exhaust hole;
[0033] 6-medium block;
[0034] 7- Exhaust slits. DETAILED DESCRIPTION
[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.
[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.
[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0040] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0041] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.
[0042] Example
[0043] Cold box core making is a highly efficient sand core manufacturing technology widely used in the metal casting industry, particularly in the production of iron castings and some aluminum alloys. Compared to traditional hot box core making, cold box core making does not require a heated binder to form the core, hence the name "cold core".
[0044] The key to cold box core making is the use of a special resin binder that has a low curing temperature and can harden quickly at room temperature or lower. The cold box core making process mainly includes the following steps:
[0045] 1. Prepare the core box: The core box is the mold used to hold the sand and form the sand core. The core box is usually made of metal and designed with precise geometry to match the corresponding part of the casting.
[0046] 2. Mixing core sand: Mix dry sand and resin binder in a certain proportion. Resin binder usually includes stearic acid, calcium stearate or other similar resin compounds.
[0047] 3. Sand shooting: The cold core machine uses compressed air to shoot the mixed core sand into the core cavity.
[0048] 4. Hardening process: The coated core box is placed in a specific environment (such as indoors) to allow the resin binder to slowly cure. This process is usually carried out at room temperature, and the time depends on the type of resin and the required hardness.
[0049] 5. Remove the core box: After the core sand is completely hardened, carefully remove the core box from the sand core. At this time, the sand core has formed the required internal cavity structure.
[0050] In order to solve the problem of false sand on the prepared cold rain shower core, the following measures are adopted, and the general ideas are as follows:
[0051] 1. The treatment methods of strengthening the cleaning of the exhaust plug of the cold rain core box, strengthening the cleaning of the upper and lower core boxes, extending the sand shooting time, and adjusting various parameters of triethylamine hardening have not improved the false sand phenomenon.
[0052] 2. Try adding an exhaust hole structure 5 at the position where the false sand is likely to appear in the triangle hole in the center of the cold rain shower core on the template of the cold rain shower core box to see if the false sand phenomenon can be eliminated.
[0053] Regarding the second option above, the details are as follows:
[0054] Reference Figure 1-Figure 5This embodiment provides a shower core box, comprising a box body 1, the box body 1 including a cold shower core upper template 2, the box body 1 is provided with a plurality of cold shower core cavities, the cold shower core cavities are used to produce the cold shower core, the cold shower core upper template 2 is also evenly provided with a plurality of shower hole model holes 4, used to form shower holes on the produced cold shower core. The shower hole model holes 4 are inverted conical holes, and the shower holes on the produced cold shower core are also inverted conical holes, such as Figure 1 .
[0055] Here is a brief introduction to the structure of the prepared rain shower core:
[0056] The molded cold shower core includes a disc body, a central triangular hole is opened at the center of the disc body, and the triangular part of the central triangular hole is chamfered; a plurality of shower holes are also opened on the disc body, and the shower holes are shower gates when the wheel is cast.
[0057] Since at least one circle of exhaust hole structures 5 is arranged at the position corresponding to the disc body on the template 2 of the cold rain shower core, it is precisely because of the existence of these exhaust hole structures 5 that there is no problem of false sand at the main position of the disc body of the cold rain shower core, while there is no central hole structure at the edge of the central triangular hole on the template 2 of the cold rain shower core, so the problem of false sand will occur. Based on this structure of the cold rain shower core and the above conjecture, exhaust hole structures 5 are also opened on the three sides of the template 2 of the cold rain shower core corresponding to the central triangular hole. The exhaust hole structure 5 includes an exhaust hole 502 and an exhaust plug hole 501 located at the outer end of the exhaust hole 502. The exhaust plug hole 501 is coaxial with the exhaust hole 502, and the diameter of the exhaust plug hole 501 is larger than the diameter of the exhaust hole 502. The exhaust plug hole 501 is used to install an exhaust plug.
[0058] Specifically, two exhaust hole structures 5 are respectively provided on each side of the central triangular hole corresponding to the cold rain shower core upper template 2, and the two exhaust holes 502 are evenly arranged along the sides of the central triangular hole. Figure 4 shown.
[0059] In this embodiment, all vent hole structures 5 on the upper template 2 of the cold shower core are identical, and the diameter of the vent holes 502 in the vent hole structures 5 ranges from 12 to 18 mm. The diameter of the vent holes 502 is preferably 3 mm smaller than the diameter of the vent plug hole 501 for installing the vent plug. Preferably, the diameter of the vent holes 502 is designed to be 16 mm, and the diameter of the vent plug hole 501 is designed to be 19 mm. The increased diameter of the vent holes 502 can reduce the risk of clogging with core sand, increase the effective ventilation area of the vent plug hole 501, and help eliminate the phenomenon of empty sand.
[0060] In this embodiment, the exhaust plug to be installed in each exhaust hole 502 is a cap-shaped structure, and the longitudinal section of the exhaust plug is door-shaped. The thickness of the side wall of the exhaust plug is designed to be 1.2 mm.
[0061] The center of the upper template 2 of the cold shower core is a central block 6, the inner side of which is formed with three evenly distributed and intersecting air slits 7. The position of the central block 6 corresponds exactly to the position of the central triangular hole of the cold shower core, and the three air slits 7 are evenly distributed around the central axis of the upper template 2 of the cold shower core.
[0062] In this embodiment, the width of the venting slit 7 ranges from 28 to 36 mm. Preferably, the width of the venting slit 7 is 32 mm. The original width of the venting slit 7 in the middle block 6 has been widened and improved to 32 mm, which can increase the venting cross-sectional area, enhance venting, and further eliminate the phenomenon of false sand.
[0063] In this embodiment, the box body 1 further includes a cold floating core upper template 3. Three cold rain shower core cavities and one cold floating core cavity are provided in the box body 1. The three cold rain shower core cavities and one cold floating core cavity are distributed in a rectangular shape. The cold rain shower core upper templates 2 are provided in a one-to-one correspondence with the cold rain shower core cavities. The cold floating core upper templates 3 are provided in correspondence with the cold floating core cavities. The cold floating core upper template 3 is evenly provided with multiple exhaust hole structures 5.
[0064] The cold shower core upper template 2 is evenly provided with 12 shower hole model holes 4 and two circles of exhaust hole structures 5 along its central axis, wherein the first circle of exhaust hole structures 5 are collectively referred to as inner circle exhaust holes 5b, and the second circle of exhaust hole structures 5 are collectively referred to as outer circle exhaust holes 5c. The inner circle exhaust holes 5b and the outer circle exhaust holes 5c are respectively located in the inner circle and outer circle of the shower hole model hole 4, and the inner circle exhaust holes 5b and the outer circle exhaust holes 5c respectively include 12 of the exhaust hole structures 5; each exhaust hole structure 5 is the same, and in order to facilitate the distinction between the 6 exhaust hole structures 5 corresponding to the central triangular hole and the inner circle exhaust holes 5b and the outer circle exhaust holes 5c, the 6 exhaust hole structures 5 corresponding to the central triangular hole are collectively referred to as central exhaust holes 5a. Preferably, all the exhaust hole structures 5 of the inner circle exhaust holes 5b and all the exhaust hole structures 5 of the outer circle exhaust holes 5c are staggered with each other, such as Figure 2 As shown. There are 30 vent structures 5 on each cold rain shower core template 2. The cold floating core template 3 is provided with multiple vent structures 5 and multiple rain shower hole model holes 4, which are distributed as follows. Figure 3 The number of the rain shower hole model holes 4 on the cold floating core upper template 3 is 12 in total, and the number of the exhaust hole structures 5 is 18 in total.
[0065] The following table shows the actual scrap rate statistics of cold rain shower cores produced before and after the improvement of the false sand in the cold rain shower cores:
[0066]
[0067] After the above improvements, the shower core box has been actually produced. The false sand at the edge and the circular periphery of the central triangular hole of the cold shower core has basically disappeared, which reduces or eliminates the false sand phenomenon of the cold shower core, increases the compactness of the cold shower core, reduces the rejection rate of the shower core, and achieves good technical results.
[0068] The beneficial effects of the technical solution of the utility model are:
[0069] In order to meet the company's quality requirements for wheel production, the resin content must be (2.8~3.3)% of the sand weight. On this basis, the present application provides exhaust hole structures 5 on the three sides of the cold rain shower core template 2 corresponding to the central triangular hole, and thickens the diameter of the exhaust hole 502 to promote exhaust, and widens the width of the exhaust strip 7 to promote exhaust; since the three sides of the central triangle of the prepared cold rain shower core are prone to false sand phenomenon, adding exhaust hole structures 5 to the places where false sand is likely to occur can increase exhaust. After this series of improvements, the edge part of the central triangular hole of the prepared cold rain shower core and its surrounding area basically have no false sand phenomenon, which reduces or eliminates the false sand phenomenon of the cold rain shower core, increases the compactness of the cold rain shower core, and reduces the scrap rate of the rain shower core.
[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A shower core box, comprising a box body (1), wherein the box body (1) comprises a cold shower core upper template (2), characterized in that: A plurality of cold shower core cavities are provided in the box body (1), and the cold shower core cavities are used to produce the cold shower cores. A plurality of shower hole model holes (4) are also evenly provided on the cold shower core upper template (2) for forming shower holes on the produced cold shower cores. An exhaust hole structure (5) is respectively provided on three sides of the cold rain shower core upper template (2) corresponding to the central triangular hole on the cold rain shower core. The exhaust hole structure (5) comprises an exhaust hole (502) and an exhaust plug hole (501) located at the outer end of the exhaust hole (502). The exhaust plug hole (501) is coaxially arranged with the exhaust hole (502), and the diameter of the exhaust plug hole (501) is larger than the diameter of the exhaust hole (502). An exhaust plug is installed in the exhaust plug hole (501).
2. The shower core box according to claim 1, characterized in that: The diameter of the exhaust hole (502) ranges from 12 to 18 mm.
3. The rain shower core box according to claim 2, characterized in that: The diameter of the exhaust hole (502) is in the range of 16 mm.
4. The rain shower core box according to claim 2, characterized in that: The exhaust plug is a cap-shaped structure, and the longitudinal section of the exhaust plug is door-shaped. The side wall thickness of the exhaust plug is 1.2 mm.
5. The shower core box according to claim 1, characterized in that: The central portion of the cold rain shower core upper template (2) is a central block (6), and the inner side surface of the central block (6) is formed with three evenly distributed and mutually intersecting exhaust slits (7).
6. The rain shower core box according to claim 5, characterized in that: The width of the exhaust slit (7) ranges from 28 to 36 mm.
7. The rain shower core box according to claim 6, characterized in that: The width of the exhaust slit (7) is 32 mm.
8. The shower core box according to claim 1, characterized in that: The box body (1) further comprises a cold floating core upper template (3), wherein three cold rain shower core cavities and one cold floating core cavity are arranged in the box body (1), the three cold rain shower core cavities and one cold floating core cavity are distributed in a rectangular shape, and the cold rain shower core upper template (2) is arranged in a one-to-one correspondence with the cold rain shower core cavities, the cold floating core upper template (3) is arranged in correspondence with the cold floating core cavities, and the cold floating core upper template (3) is evenly provided with a plurality of exhaust hole structures (5).
9. The rain shower core box according to claim 8, characterized in that: The cold shower core upper template (2) is evenly provided with 12 shower hole model holes (4) and two circles of exhaust hole structures (5) along its central axis, wherein the first circle of exhaust hole structures (5) and the second circle of exhaust hole structures (5) respectively include 12 exhaust hole structures (5), and the first circle of exhaust hole structures (5) and the second circle of exhaust hole structures (5) are respectively located in the inner circle and the outer circle of the shower hole model hole (4).
10. The shower core box according to claim 1, characterized in that: The molded cold rain shower core includes a disc body, a central triangular hole is opened at the center of the disc body, and the triangular part of the central triangular hole is chamfered; The disc body is also provided with a plurality of shower holes, which serve as shower gates when the wheel is cast.