A cutting structure for opening a mold of a bent pipe type casting

Abstract

The utility model belongs to the technical field of pipe bend casting mold opening, and disclose a kind of cutting structure for pipe bend casting mold opening, including two pipe mold bodies;The surface of pipe mold body is equipped with bonding assembly, and the bonding assembly includes the bending mold symmetrically adhered at the bending of two pipe mold bodies and the bonding positioning strip and the bonding strip for bonding, positioning groove equipped in the inner side wall of one bending mold;The surface of bending mold is equipped with auxiliary core-pulling assembly, and the auxiliary core-pulling assembly includes auxiliary block symmetrically installed in the outer side of bending mold, the utility model has the advantages that multiple movable blocks can be operated without pulling, the number of movable blocks is reduced, the structure of mold is simplified, wax operation is facilitated, operation efficiency is improved, mold wear is reduced during mold operation, mold life is improved, wax quality is also improved, and mold use effect is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold opening technology for pipe bending casting molds, specifically a cutting structure for opening pipe bending casting molds. Background Technology

[0002] In the field of precision casting, such as lost-wax casting, the production of bent pipe castings (such as automotive intake and exhaust pipes, fluid transport pipelines, etc.) has always faced challenges in mold design and manufacturing. These castings typically have complex curved internal cavities and non-linear channels. In order to form these cavities in the mold, existing technologies generally adopt a multi-piece core-pulling structure. Specifically, the traditional method requires designing and manufacturing multiple sets (usually three to five, or even more) of sliding core-pulling blocks based on the axial direction and cross-sectional changes of the bent pipe. After wax injection, these blocks must be pulled out one by one in a strict sequence before the wax model can be finally removed. However, this traditional process that relies on multiple core-pulling blocks has many inherent defects and has become a bottleneck restricting production efficiency and casting quality. The process requires the design and fabrication of numerous complex-shaped core-pulling blocks, guiding mechanisms, and driving devices. The precision requirements for the fit between the core-pulling blocks and between the core-pulling blocks and the mold body are extremely high, making processing difficult and significantly increasing the mold's manufacturing cost and cycle time. Furthermore, multiple core-pulling blocks must be pulled out sequentially in a predetermined order, involving numerous and time-consuming steps. During the pulling process, the mold wears out quickly, resulting in a short service life. A large number of core-pulling blocks also means a large number of sliding friction surfaces, which are highly susceptible to wear and tear during frequent mold opening and closing cycles.

[0003] Therefore, a cutting structure for mold opening of pipe-type castings is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a cutting structure for opening molds of pipe-type castings. It has the advantages of eliminating the need to pull out multiple movable blocks for operation, reducing the number of core-pulling movable blocks, simplifying the mold structure, facilitating wax injection, improving work efficiency, reducing mold wear during mold operation, increasing mold life, and improving the quality of waxed parts, thus effectively improving the mold's performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cutting structure for opening molds for pipe-type castings, comprising two pipe mold bodies; The surface of the tube mold body is equipped with an adhesive assembly, which includes a bending mold symmetrically bonded to the bending points of the two tube mold bodies, an adhesive positioning strip installed on the inner side wall of one of the bending molds, and an adhesive strip and positioning groove for bonding. The bending die is equipped with an auxiliary core-pulling assembly, which includes auxiliary blocks symmetrically installed on the outer side of the bending die and a plurality of protrusions evenly distributed on the outer side of the auxiliary blocks.

[0006] Preferably, the positioning groove is formed on the inner side wall of one of the bending dies, and the adhesive positioning strip is inserted into the inside of the positioning groove. The two adhesive strips are respectively installed on the outer side of the two bending dies, and the two adhesive strips are tightly attached.

[0007] Preferably, the curves of the adhesive positioning strip and the adhesive strip are the same as the curves of the bending die.

[0008] Preferably, the adhesive positioning strip and the positioning groove are fitted with an interference fit.

[0009] Preferably, the adhesive strip and the adhesive positioning strip are integrally formed with the bending mold.

[0010] Preferably, at least one set of venting micropores are provided on the bonding surface of the adhesive strip.

[0011] Preferably, the surface of the auxiliary block is provided with an arc-shaped groove adapted to the human finger.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model simplifies the complex structure that originally required multiple core-pulling parts to a structure that only requires two split pieces by setting up an adhesive component. This directly simplifies the mold structure, reduces the number of parts, lowers manufacturing costs, and improves ease of operation. By bonding the two together, it ensures accurate positioning and firm fit when the mold is closed. The interlocking of the adhesive positioning strip and the positioning groove ensures that the two halves of the mold can quickly find their correct positions when the mold is closed, avoiding misalignment.

[0013] 2. This utility model incorporates an auxiliary core-pulling component. The arc-shaped groove on the surface of the auxiliary block is adapted to human fingers, and the friction increased by the protrusions allows workers to apply force more effortlessly and steadily when opening the mold, avoiding slippage and hand fatigue, thereby improving production efficiency and operational safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the bending mold of this utility model during separation; Figure 3 This is a schematic diagram of the bending mold and adhesive positioning strip of this utility model; Figure 4 This is a schematic diagram of the bending mold and positioning groove of this utility model; Figure 5 This is a schematic diagram of the auxiliary core-pulling component of this utility model.

[0015] In the diagram: 1. Tube mold body; 2. Adhesive assembly; 21. Bending mold; 22. Adhesive positioning strip; 23. Adhesive strip; 24. Positioning groove; 3. Auxiliary core pulling assembly; 31. Protrusion; 32. Auxiliary block. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 5 As shown, this utility model provides a cutting structure for opening molds for pipe-type castings, including two pipe mold bodies 1; An adhesive assembly 2 is installed on the surface of the tube mold body 1. The adhesive assembly 2 includes a bending mold 21 symmetrically bonded to the bending points of the two tube mold bodies 1, an adhesive positioning strip 22 installed on the inner side wall of one of the bending molds 21, an adhesive strip 23 for bonding, and a positioning groove 24. The positioning groove 24 is formed on the inner side wall of another bending mold 21, and the adhesive positioning strip 22 is inserted into the inside of the positioning groove 24. Two adhesive strips 23 are respectively installed on the outer side of the two bending molds 21, and the two adhesive strips 23 are tightly attached. This simplifies the complex structure that originally required multiple core-pulling parts to a structure that only requires two split pieces. This directly simplifies the mold structure, reduces the number of parts, reduces manufacturing costs, and improves the ease of operation. The two are bonded together to ensure accurate positioning and firm fit when the mold is closed. The insertion and cooperation between the adhesive positioning strip 22 and the positioning groove 24 ensures that the two halves of the mold can quickly find the correct position when the mold is closed, avoiding misalignment.

[0018] The curves of the adhesive positioning strips 22 and 23 are the same as the curve of the bending die 21. The curves of the adhesive positioning strips 22 and 23 are completely consistent with the bending die 21, which ensures the continuity and flatness of the entire die cavity surface, thereby ensuring the dimensional accuracy and surface quality of the casting and avoiding casting defects caused by structural steps.

[0019] The adhesive positioning strip 22 and the positioning groove 24 are fitted with an interference fit. This interference fit ensures that the two are tightly bonded after mold closing, forming a strong connection force. This not only enhances the overall rigidity of the mold and allows it to better withstand wax injection pressure, but also effectively prevents accidental separation before mold opening.

[0020] The adhesive strip 23 and the adhesive positioning strip 22 are integrally formed with the bending mold 21, which avoids errors that may be caused by later assembly. This makes the part structure more robust and the positioning more accurate, while also simplifying the manufacturing and assembly process of the mold.

[0021] At least one set of venting micropores are provided on the bonding surface of the adhesive strip 23. The venting micropores on the bonding surface of the adhesive strip 23 provide an efficient venting channel for the bonding process, avoiding air bubbles and other issues that could affect the bonding effect.

[0022] The bending die 21 is equipped with an auxiliary core-pulling assembly 3. The auxiliary core-pulling assembly 3 includes auxiliary blocks 32 symmetrically installed on the outer side of the bending die 21 and a plurality of protrusions 31 evenly distributed on the outer side of the auxiliary blocks 32. The surface of the auxiliary block 32 is provided with an arc-shaped groove that fits the human finger. The arc-shaped groove on the surface of the auxiliary block 32 fits the human finger, and the friction increased by the protrusion 31 makes it easier and more stable for workers to apply force when opening the mold, avoiding slippage and hand fatigue, thereby improving production efficiency and operational safety.

[0023] Among them, the structure of the pipe mold body 1 and the bending mold 21 is existing technology, and its working principle is a well-known technology. The appropriate model is selected according to the actual use.

[0024] Working principle and process: The adhesive positioning strip 22 on one side of the bending mold 21 is precisely inserted into the positioning groove 24 of the other side of the bending mold 21. Since the adhesive positioning strip 22 and the positioning groove 24 adopt an interference fit, this step can achieve rapid and accurate positioning of the mold and form a preliminary fixation. The adhesive is applied to the bending mold 21 and the adhesive strip 23, and then pressure is applied to make the adhesive strip 23 on the two bending molds 21 fit tightly together. The adhesive strip 23 not only provides the bonding range, but the venting micropores on its bonding surface also provide a channel for gas to be discharged in the subsequent wax injection process. Preheat the assembled mold appropriately to ensure that the wax can flow smoothly inside the mold and fill the cavity.

[0025] Injecting wax: Molten wax is injected into the mold cavity at high speed through the mold gate. After injection, a certain pressure is maintained (holding pressure) to ensure that the wax completely fills the cavity. Wait for the wax in the mold to cool naturally or solidify through auxiliary cooling to form the required curved tube wax model. After confirming that the wax model has completely solidified, start preparing to open the mold. The operator places their fingers into the arc-shaped groove on the surface of the auxiliary block 32, holds the auxiliary blocks 32 on both sides with both hands, and applies a uniform pulling force in opposite directions. The protrusions 31 on the auxiliary block 32 increase the friction between the hand and the mold, preventing slippage and making the operation easier. Under the action of the pulling force, the two bending molds 21 that were originally glued together by the adhesive positioning strip 22 and the adhesive strip 23 begin to separate. The adhesive positioning strip 22 is pulled out from the positioning groove 24, and the bonding surface of the adhesive strip 23 also separates. Since the entire mold is separated along the designed cutting surface, there is no need to pull out any complicated movable blocks. The two half molds can be separated directly to the sides. After the mold is separated, the internal curved wax pattern is fully exposed. At this point, simply remove the solidified wax pattern from one of the mold halves, inspect and clean the parting surfaces and cavities of both mold halves, remove any residual wax residue or impurities, repeat the above process, re-glu the mold in place, and proceed to the next production cycle.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting structure for opening a mold for bent pipe castings, comprising two pipe mold bodies (1); Its features are: The surface of the tube mold body (1) is fitted with an adhesive assembly (2). The adhesive assembly (2) includes a bending mold (21) symmetrically bonded to the bending points of the two tube mold bodies (1), an adhesive positioning strip (22) installed on the inner side wall of one of the bending molds (21), and an adhesive strip (23) and a positioning groove (24) for bonding. The bending mold (21) is equipped with an auxiliary core-pulling assembly (3). The auxiliary core-pulling assembly (3) includes auxiliary blocks (32) symmetrically installed on the outer side of the bending mold (21) and a plurality of protrusions (31) evenly distributed on the outer side of the auxiliary blocks (32).

2. The cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: The positioning groove (24) is formed on the inner side wall of one of the bending molds (21), and the adhesive positioning strip (22) is inserted into the inside of the positioning groove (24). The two adhesive strips (23) are respectively installed on the outer side of the two bending molds (21), and the two adhesive strips (23) are tightly attached.

3. The cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: The curves of the adhesive positioning strip (22) and the adhesive strip (23) are the same as the curve of the bending die (21).

4. The cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: The adhesive positioning strip (22) and the positioning groove (24) are fitted with an interference fit.

5. A cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: The adhesive strip (23) and the adhesive positioning strip (22) are integrally formed with the bending mold (21).

6. The cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: At least one set of exhaust micropores are provided on the bonding surface of the adhesive strip (23).

7. A cutting structure for opening a mold for bent pipe castings according to claim 1, characterized in that: The surface of the auxiliary block (32) is provided with an arc-shaped groove adapted to the human finger.

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