Lower core frame with hidden inner hole

Abstract

The utility model discloses a lower core frame with hidden inner hole, include: lower core frame main part is provided with the air hole sealing plate on lower core frame main part, is equipped with a plurality of air holes on the air hole sealing plate, the front of air hole sealing plate is apart from each other and is provided with a plurality of mistake prevention boss, is provided with the lower core frame filter screen between two mistake prevention boss of lower core frame main part center upper side, two hidden holes are located in two sand cores respectively on each mistake prevention boss, and two sand cores are fixed on mistake prevention boss respectively, and the hidden hole is communicated with corresponding air hole on the air hole sealing plate, and one sand core is provided with left and right mistake prevention structure. This lower core frame with hidden inner hole is in original air area through lower core frame inlay hidden inner hole and expands air area, guarantees that sand core both sides air pressure is even, and then realizes castings one mould six pieces or one mould eight pieces arrangement and continuous production, improves production efficiency and economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of parts casting production technology, and in particular to a lower core frame with a hidden inner hole. Background Technology

[0002] Currently, most modern cars are equipped with disc brakes on their front wheels, and some even have disc brakes on all four wheels. These are the components in the car's braking system that are truly responsible for stopping the vehicle. Disc brakes are hydraulically controlled, and their main components include the brake disc, brake caliper, brake pads, and brake lines. Disc brakes are characterized by rapid heat dissipation, light weight, simple construction, and easy adjustment. The brake caliper (or caliper body) is one of the main components of a car's hydraulic disc brake. After processing, it works in conjunction with the brake piston, brake disc, friction pads, and brake bracket. It is the part of the car with the most concentrated stress and the most frequent exposure to varying loads, directly affecting the car's safety performance; therefore, its design standards are extremely stringent.

[0003] The universal lower core frame and the auxiliary positioning insert for the casting sand core can only be in the middle suction area. It can be used for normal production of four pieces in one mold. However, when the casting is arranged with six or eight pieces in one mold, the auxiliary positioning insert for the casting sand core will extend beyond the middle suction area, resulting in suction on one side and no suction on the other side. There is a risk that the sand core will be thrown out or become uneven, making continuous production impossible.

[0004] In conclusion, it is necessary to design a lower core frame with a hidden inner hole to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is that, in the case of existing castings with six or eight parts per mold, there is a risk of sand cores being thrown out or uneven, making continuous production impossible. A new lower core frame with a hidden inner hole is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides a lower core frame with a hidden inner hole, comprising: a lower core frame body, an air intake sealing plate provided on the lower core frame body, multiple air intake holes provided on the air intake sealing plate, multiple anti-misalignment protrusions provided at intervals on the front side of the air intake sealing plate, a lower core frame filter screen provided between two anti-misalignment protrusions on the upper side of the center of the lower core frame body, two hidden holes provided on each anti-misalignment protrusion, located in two sand cores respectively, the two sand cores being fixed on the anti-misalignment protrusions respectively, the hidden holes communicating with the corresponding air intake holes on the air intake sealing plate, and one of the sand cores being provided with a left and right anti-misalignment structure.

[0007] In a preferred embodiment of this solution, a plurality of weight-reducing grooves are provided on the back of the air intake sealing plate, and a plurality of air intake holes are provided in the weight-reducing grooves.

[0008] In a preferred embodiment of this solution, positioning pin holes are symmetrically provided on the left and right sides of the lower middle part of the core frame body.

[0009] Furthermore, locking screw holes are symmetrically provided on the upper and lower left and right sides of the lower core frame body.

[0010] Implementing this utility model has the following beneficial effects:

[0011] This lower core frame with a hidden inner hole meets the actual use requirements. Compared with the general-purpose lower core frame, the auxiliary positioning insert for casting sand cores can only be in the middle suction area, which cannot realize the arrangement of six or eight castings in one mold and continuous production. The lower core frame with a hidden inner hole expands the suction area in the original suction area by hiding the inner hole of the lower core frame insert, ensuring that the suction pressure on both sides of the sand core is uniform, thereby realizing the arrangement of six or eight castings in one mold and continuous production, improving production efficiency and economic benefits.

[0012] This lower core frame with a hidden inner hole ensures uniform air pressure in the suction holes on both sides of the casting, eliminates the risk of core loss, facilitates production continuity, guarantees product quality, and significantly improves the process yield, which can reach up to 60%. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the structure of the lower core frame with a hidden inner hole provided by this utility model;

[0015] Figure 2 A schematic diagram of the back structure of the lower core frame with a hidden inner hole provided by this utility model;

[0016] Figure 3 A schematic diagram showing the location of the hidden hole on the anti-misalignment boss;

[0017] In the diagram: 1. Lower core frame body, 2. Air intake sealing plate, 3. Weight reduction groove, 4. Air intake, 5. Anti-misalignment boss, 6. Lower core frame filter screen, 7. Hidden hole, 8. Sand core, 9. Left and right anti-misalignment structure, 10. Positioning pin hole, and 11. Locking screw hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 , Figure 1 A schematic diagram of the structure of the lower core frame with a hidden inner hole provided by this utility model; Figure 2 This is a schematic diagram of the back structure of the lower core frame with a hidden inner hole provided by the present invention; the lower core frame with a hidden inner hole includes: a lower core frame body 1.

[0020] The lower core frame body 1 is provided with an air intake sealing plate 2. Multiple weight reduction grooves 3 are opened on the back of the air intake sealing plate 2, and multiple air intake holes 4 are opened in the weight reduction grooves 3.

[0021] Multiple anti-mistake protrusions 5 are spaced apart on the front of the air intake sealing plate 2, and a lower core frame filter screen 6 is provided between the two anti-mistake protrusions 5 on the upper side of the center of the lower core frame body 1.

[0022] Each error-proof protrusion 5 has two hidden holes 7, located within two sand cores 8. The two sand cores 8 are fixed to the error-proof protrusion 5. Please refer to [link / reference]. Figure 3 , Figure 3 This is a schematic diagram showing the location of the hidden hole on the anti-misalignment protrusion. The hidden hole 7 is connected to the corresponding air intake hole 4 on the air intake hole sealing plate 2, and one of the sand cores 8 is equipped with a left and right anti-misalignment structure 9.

[0023] For ease of installation, positioning pin holes 10 are symmetrically provided on the left and right sides of the lower middle part of the lower core frame body 1, and locking screw holes 11 are symmetrically provided on the left and right sides of the upper and lower parts of the lower core frame body 1.

[0024] This lower core frame with a hidden inner hole meets practical application requirements. Compared to general-purpose lower core frames, where the auxiliary positioning insert for casting sand cores is limited to the central suction area and cannot achieve six- or eight-piece arrangement or continuous production in a single mold, the lower core frame with a hidden inner hole expands the suction area by using the hidden inner hole in the lower core frame insert. This ensures uniform suction pressure on both sides of the sand core, thereby enabling six- or eight-piece arrangement and continuous production in a single mold, improving production efficiency and economic benefits.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lower core frame with a hidden inner hole, characterized in that, include: The lower core frame body has an air intake sealing plate with multiple air intake holes. Multiple anti-misalignment protrusions are spaced apart on the front side of the air intake sealing plate. A lower core frame filter screen is positioned between two anti-misalignment protrusions on the upper center side of the lower core frame body. Each anti-misalignment protrusion has two hidden holes located within two sand cores. The two sand cores are fixed to the anti-misalignment protrusions. The hidden holes communicate with the corresponding air intake holes on the air intake sealing plate. One of the sand cores has a left-right anti-misalignment structure.

2. The lower core frame with a hidden inner hole according to claim 1, characterized in that, The back of the air intake sealing plate is provided with multiple weight reduction grooves, and the multiple air intake holes are all opened in the weight reduction grooves.

3. The lower core frame with a hidden inner hole according to claim 1, characterized in that, The lower core frame body has symmetrical positioning pin holes on the left and right sides of the lower middle part.

4. The lower core frame with a hidden inner hole according to claim 3, characterized in that, The upper and lower left and right sides of the lower core frame body are symmetrically provided with locking screw holes.

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