High-precision core-pulling structure for wax mold

Abstract

The utility model aims at providing a wax mould high accuracy core-pulling structure, it includes lower mould, core-pulling and upper mould, the top surface of lower mould is set up with the first type groove and the chute intercommunication of chute, the core-pulling is arranged in the chute and slides, the side surface of core-pulling is set up with the second type groove, the top surface of core-pulling is also set up with the locating groove, the side of locating groove near the second type groove is provided with the first slope, the bottom surface of upper mould is set up with the third type groove and the emptying groove intercommunication of emptying groove, is provided with the locating block on the emptying groove, the side of locating block near the third type groove is provided with the second slope, the upper mould is used for when with lower mould buckling, to make the second slope push the first slope, and then make the third type groove, the second type groove, the first type groove form a closed wax mould cavity. Thus, the first slope is pushed by the second slope, even if after repeated use appears abrasion, can always ensure that the first type groove, the second type groove, the third type groove tightly enclose and form the wax mould cavity of closed state.

Description

Technical Field

[0001] This utility model relates to the technical field of wax molds, and in particular to a high-precision core-pulling structure for wax molds. Background Technology

[0002] A wax model is a mold made of wax, typically used for casting or creating models of other objects. Its shape and size determine the shape and size of the final casting.

[0003] Wax casting (also known as investment casting) is a casting method that uses wax models. First, a wax model is formed, and then a refractory coating such as ceramic is applied to the surface of the wax model. After drying, a hollow shell is formed. The wax model inside is heated and melted out, and the liquid metal is poured into the hollow shell. After cooling, a casting billet is formed. Finally, the outer shell is removed, and the casting billet is processed to obtain the casting.

[0004] Compared to sand casting, wax casting does not produce a parting surface, and the surface of the casting is smooth, without flash or burrs, so there is no need for a lot of grinding and polishing. Moreover, wax casting has strong plasticity and fluidity, and can realize complex structures that are difficult to achieve with traditional casting (sand casting, die casting). Therefore, it can cast castings with complex structures, and wax casting is a way to realize the manufacturing of high-precision parts.

[0005] The structure of the wax model is identical to that of the final casting; therefore, a complex casting structure implies a complex wax model structure. Currently, manufacturing wax models with complex structures often requires the use of molds with core-pulling mechanisms, which are positioned and fixed using pins and screws. However, using pins and screws for locking is not only cumbersome, but also leads to a decrease in the positioning accuracy of the core-pulling mechanism after the pins wear down, ultimately resulting in large dimensional errors in the wax model. Therefore, to improve the manufacturing quality of wax models, this application proposes a high-precision core-pulling structure for wax models. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-precision core-pulling structure for wax molds that can effectively improve the manufacturing quality of wax mold parts.

[0007] The objective of this utility model is achieved through the following technical solution: A high-precision core-pulling structure for wax molds, comprising: The lower mold has a groove and a first groove communicating with the groove on its top surface; A core puller, wherein the core puller is slidably disposed within the slide groove, a second groove is formed on one side surface of the core puller, and a positioning groove is formed on the top surface of the core puller, wherein a first inclined surface is provided on the side of the positioning groove near the second groove; and The upper mold has a clearance groove and a third type groove communicating with the clearance groove on its bottom surface. A positioning block is provided on the clearance groove, and a second inclined surface is provided on the side of the positioning block near the third type groove. When the upper mold is engaged with the lower mold, the second inclined surface pushes against the first inclined surface, thereby causing the third type groove, the second type groove, and the first type groove to surround and form a closed wax mold cavity.

[0008] Optionally, multiple types of the first type groove, the second type groove, and the third type groove are provided, with each type of the first type groove, the second type groove, and the third type groove being distributed accordingly.

[0009] Optionally, the first type of groove, the second type of groove, and the third type of groove are each provided in three parts.

[0010] Optionally, the lower mold is provided with a feeding groove, and each of the first grooves is connected to the feeding groove.

[0011] Optionally, a guide block is provided on the side of the core puller away from the second groove, and the guide block extends to one side of the lower mold.

[0012] Optionally, a guide rod is provided on the lower mold, and the guide rod passes through the guide block.

[0013] Optionally, two positioning slots and two positioning blocks are provided, so that when the upper mold and the lower mold are engaged, the two positioning blocks are respectively accommodated in the two positioning slots.

[0014] Compared with the prior art, the present invention has at least the following advantages: This utility model discloses a high-precision core-pulling structure for wax molds, comprising a lower mold, a core-pulling component, and an upper mold. The top surface of the lower mold has a sliding groove and a first groove communicating with the sliding groove. The core-pulling component is slidably disposed within the sliding groove. A second groove is formed on one side of the core-pulling component, and a positioning groove is formed on the top surface of the core-pulling component. A first inclined surface is provided on the side of the positioning groove near the second groove. The bottom surface of the upper mold has a clearance groove and a third groove communicating with the clearance groove. A positioning block is provided on the clearance groove, and a second inclined surface is provided on the side of the positioning block near the third groove. When the upper mold is engaged with the lower mold, the second inclined surface pushes against the first inclined surface, thereby causing the third groove, the second groove, and the first groove to close together and form a sealed wax mold cavity. Thus, the second inclined surface pushes against the first inclined surface, ensuring that even after repeated use and wear, both surfaces remain inclined, guaranteeing that the first groove, the second groove, and the third groove always tightly enclose and form a sealed wax mold cavity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a high-precision core-pulling structure for a wax mold according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the upper mold according to one embodiment of the present invention; Figure 3 for Figure 1 The diagram shows a cross-sectional view of the high-precision core-pulling structure of the wax model.

[0017] Explanation of reference numerals in the attached figures: 10. High-precision core-pulling structure for wax mold; 100. Lower mold; 200. Core pulling; 300. Upper mold; 110. Sliding groove; 120. First type groove; 210. Second type groove; 220. Positioning groove; 221. First inclined surface; 310. Clearance groove; 320. Third type groove; 330. Positioning block; 331. Second inclined surface; 130. Feed groove; 410. Guide block; 420. Guide rod. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0019] like Figures 1 to 3 As shown, a high-precision core-pulling structure 10 for wax molds includes a lower mold 100, a core-pulling device 200, and an upper mold 300. The top surface of the lower mold 100 has a sliding groove 110 and a first groove 120 communicating with the sliding groove 110. The core-pulling device 200 is slidably disposed within the sliding groove 110. A second groove 210 is formed on one side surface of the core-pulling device 200. A positioning groove 220 is also formed on the top surface of the core-pulling device 200. A first inclined surface 221 is provided on the side of the positioning groove 220 near the second groove 210. The bottom surface of the upper mold 300 is provided with a clearance groove 310 and a third type groove 320 communicating with the clearance groove 310. A positioning block 330 is provided on the clearance groove 310. A second inclined surface 331 is provided on the side of the positioning block 330 near the third type groove 320. When the upper mold 300 is engaged with the lower mold 100, the second inclined surface 331 pushes against the first inclined surface 221, thereby causing the third type groove 320, the second type groove 210 and the first type groove 120 to surround and form a closed wax mold cavity.

[0020] It should be noted that in the prior art, the core puller 200 is positioned by a pin and locked onto the lower mold 100 with screws to ensure that the second groove 210 of the core puller 200 and the first groove 120 of the lower mold 100 fit tightly together. However, in this method, when the pin is worn, the relative position of the core puller 200 in the slide groove 110 will deviate, resulting in the second groove 210 and the first groove 120 not fitting tightly together, ultimately leading to large dimensional deviations in the molding quality of the wax model. To solve this problem, a positioning groove 220 is opened on the top surface of the core puller 200, and the inner sidewall of the positioning groove 220 near the second groove 210 is set as a first inclined surface 221, which is an inclined structure. Correspondingly, a positioning block 330 is provided in the clearance groove 310 of the upper mold 300. A second inclined surface 331 is correspondingly provided on the inner side wall of the positioning block 330 near the third groove 320. The second inclined surface 331 is an inclined structure with the same inclination as the first inclined surface 221. Thus, when the upper mold 300 closes to the lower mold 100, the second inclined surface 331 pushes against the first inclined surface 221, causing the positioning block 330 to push the core puller 200 towards the first groove 120. Ultimately, the first groove 120, the second groove 210, and the third groove 320 together enclose a sealed wax mold cavity. After injecting wax into the sealed wax mold cavity, a wax mold part with the corresponding structure can be formed. Thus, even if wear occurs between the second inclined surface 331 and the first inclined surface 221 after repeated use, they will always remain in an inclined state, which can always ensure that the first groove 120, the second groove 210 and the third groove 320 are tightly enclosed to form a sealed wax mold cavity.

[0021] It is particularly important to note that in the positioning groove 220 of this application, the inner sidewall facing the first inclined surface 221 is a vertical structure. Correspondingly, the outer sidewall of the positioning block 330 facing the second inclined surface 331 is also a vertical structure. This ensures that when the upper mold 300 and lower mold 100 are engaged, the upper mold 300 can reliably push the core pull 200. When the upper mold 300 and lower mold 100 separate, since there is no contact structure between the positioning block 330 and the positioning groove 220, the upper mold 300 will not pull the core pull 200 outwards. Thus, after the upper mold 300 is completely separated from the lower mold 100, the core pull 200 can be removed by a worker. This setup effectively ensures the molding quality of the wax molded parts. Since the drive speed of the molding press's drive shaft is difficult to control precisely, the core puller 200 is prevented from disengaging when the upper mold 300 disengages from the lower mold 100. This avoids the wax molded parts from being deformed due to excessive tension caused by the core puller 200 sliding out too quickly, thus effectively improving the molding quality.

[0022] like Figure 1 and Figure 2As shown, in one embodiment, multiple types of first-type grooves 120, second-type grooves 210, and third-type grooves 320 are provided, with each type of first-type groove 120, second-type groove 210, and third-type groove 320 correspondingly distributed. In particular, in one embodiment, three types of first-type grooves 120, second-type grooves 210, and third-type grooves 320 are provided.

[0023] It should be noted that by creating multiple wax mold cavities, multiple wax mold parts can be formed simultaneously in a single mold closing operation, such as forming three wax mold parts at the same time. This effectively improves the molding efficiency of wax mold parts. like Figure 1 and Figure 2 As shown, in one embodiment, a feed groove 130 is provided on the lower mold 100, and each first groove 120 is connected to the feed groove 130.

[0024] It should be noted that, correspondingly, a groove is also provided on the upper mold 300 that is aligned with the feed groove 130, so that when the upper mold 300 and the lower mold 100 are engaged, the groove of the upper mold 300 and the feed groove 130 of the lower mold 100 together form a complete feed channel. This feed channel is connected to the wax mold cavity, and wax is injected into each wax mold cavity at the same time through the feed groove 130.

[0025] like Figure 1 and Figure 3 As shown, in one embodiment, a guide block 410 is provided on the side of the core puller 200 away from the second groove 210, and the guide block 410 extends to one side of the lower mold 100.

[0026] It should be noted that the guide block 410 is mounted on the core pull 200 with screws. This is to facilitate the structural fit between the core pull 200 and the lower mold 100. On the other hand, it is designed as a two-part assembly structure to facilitate the machining of the second groove 210 and the positioning groove 220 on the core pull 200. Compared to machining the second groove 210 and the positioning groove 220 on the larger and heavier mold blank, machining the second groove 210 and the positioning groove 220 on the smaller and lighter core pull 200 is beneficial for mold processing and production.

[0027] Furthermore, such as Figure 1 and Figure 3 As shown, in one embodiment, a guide rod 420 is provided on the lower mold 100, and the guide rod 420 passes through the guide block 410.

[0028] It should be noted that a through hole is provided horizontally on the guide block 410, and the guide rod 420 fits through the through hole. In this way, when the worker needs to slide the core pull 200 in the opposite direction to ensure that the wax mold part is removed from the second groove 210, the cooperation between the guide rod 420 and the guide block 410 and the cooperation between the core pull 200 and the slide groove 110 can make the core pull 200 stably move away from the wax mold part to complete the demolding.

[0029] like Figure 1 and Figure 2 As shown, in one embodiment, two positioning slots 220 and two positioning blocks 330 are provided. When the upper mold 300 and the lower mold 100 are engaged, the two positioning blocks 330 are respectively accommodated in the two positioning slots 220.

[0030] It should be noted that, in order to improve the sliding stability of the core pull 200, the positioning groove 220 and the positioning block 330 are both set as two aligned pieces. When the upper mold 300 and the lower mold 100 are closed, the two second inclined surfaces 331 push against the two first inclined surfaces 221 respectively, ensuring that the core pull 200 slides towards the first groove 120, and finally the first groove 120, the second groove 210, and the third groove 320 are tightly enclosed to form a sealed wax mold cavity.

[0031] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood as including, but not limited to, locking and fixing with screws / bolts, welding, or bonding with adhesives, wherein the adhesives used can be commercially available finished products. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-precision core-pulling structure for wax molds, characterized in that, include: The lower mold has a groove and a first groove communicating with the groove on its top surface; A core puller, wherein the core puller is slidably disposed within the slide groove, a second groove is formed on one side surface of the core puller, and a positioning groove is formed on the top surface of the core puller, wherein a first inclined surface is provided on the side of the positioning groove near the second groove; and The upper mold has a clearance groove and a third type groove communicating with the clearance groove on its bottom surface. A positioning block is provided on the clearance groove, and a second inclined surface is provided on the side of the positioning block near the third type groove. When the upper mold is engaged with the lower mold, the second inclined surface pushes against the first inclined surface, thereby causing the third type groove, the second type groove, and the first type groove to surround and form a closed wax mold cavity.

2. The high-precision core-pulling structure for wax molds according to claim 1, characterized in that, The first type of groove, the second type of groove, and the third type of groove are all provided in multiples, and each of the first type of groove, the second type of groove, and the third type of groove is distributed accordingly.

3. The high-precision core-pulling structure for wax molds according to claim 2, characterized in that, The first type of groove, the second type of groove, and the third type of groove are each provided in three parts.

4. The high-precision core-pulling structure for wax molds according to claim 2, characterized in that, The lower mold is provided with a feeding groove, and each of the first grooves is connected to the feeding groove.

5. The high-precision core-pulling structure for wax molds according to claim 1, characterized in that, A guide block is provided on the side of the core puller away from the second groove, and the guide block extends to one side of the lower mold.

6. The high-precision core-pulling structure for wax molds according to claim 5, characterized in that, The lower mold is provided with a guide rod, which passes through the guide block.

7. The high-precision core-pulling structure for wax molds according to claim 1, characterized in that, Two positioning slots and two positioning blocks are provided. When the upper mold and the lower mold are engaged, the two positioning blocks are respectively accommodated in the two positioning slots.

Images