A cast wax mold group tree mold iron core head anti-drop structure

Abstract

The application discloses a cast wax mold group tree mold core head anti-falling structure, which comprises a wax mold, the top end of the wax mold is provided with a mold head, the inside of the mold head is provided with a cavity, the top end of the mold head is provided with a mold head cup opening, the upper side of the mold head cup opening is provided with a cover plate, the middle part of the cover plate is provided with a first through hole; the inside of the wax mold is provided with a vertically extending iron rod, the top end of the iron rod is fixedly provided with an iron core head, the inside of the iron core head is provided with a threaded hole, the threaded hole of the iron core head is in threaded connection with the bottom end of a vertically extending first screw rod, the top end of the first screw rod sequentially penetrates the cavity, the mold head cup opening and the first through hole in sequence in an upward direction; the upper side of the cover plate is provided with a first nut, the first nut is in threaded connection with the top end of the first screw rod; the shape of the iron core head is designed as a vertically extending prism, and the side wall of the iron core head is provided with a boss. The structure design of the application is reasonable, the iron core head can be kept relatively fixed, the iron core head is prevented from falling out into the cavity, and thus the cover plate is locked.

Description

Technical Field

[0001] This invention relates to the field of casting wax model tree technology, and in particular to a structure for preventing the iron core head of the casting wax model tree from detaching. Background Technology

[0002] Since there is a certain degree of technical similarity between the existing technology and the technical solution of this invention, please refer to [the relevant documentation]. Figures 1 to 6 To understand the prior art: The existing casting wax mold assembly tree mold head iron core head structure includes a wax mold (1), the top of the wax mold (1) is provided with a mold head (101), the mold head (101) has a cavity (102) inside, the top of the mold head (101) is provided with a mold head cup mouth (103), a cover plate (2) is provided above the mold head cup mouth (103), the diameter of the cover plate (2) is larger than the diameter of the mold head cup mouth (103), and a first through hole (201) is provided in the middle of the cover plate (2); the wax mold (1) has a vertically extending iron rod (3) inside, and an iron core head (4) is fixed at the top of the iron rod (3). (4) The core head (4) is located at the bottom of the mold head (101). The core head (4) has a threaded hole (401) inside. The threaded hole (401) of the core head (4) is threadedly connected to the bottom end of the vertically extending first screw (5). The top end of the first screw (5) passes through the cavity (102), the mold head cup mouth (103), and the first through hole (201) in sequence. The cover plate (2) is provided with a first nut (6) above it. The first nut (6) is threadedly connected to the top end of the first screw (5). The outer diameter of the first nut (6) is larger than the inner diameter of the first through hole (201). The core head (4) is shaped as a vertically extending cylinder. In practical applications: In order for the cover plate to prevent the shell material from entering the cavity, the first nut needs to be tightened downwards to avoid the cover plate from becoming loose.

[0003] The defects of the above-mentioned prior art are as follows: Because automated production lines require a tighter fit between the cover plate and the mold head cup to ensure that it does not loosen during the shell making process, the first nut is usually tightened downwards after it is fully tightened. However, since the core head of the existing casting wax mold tree mold head core head structure is cylindrical and has no anti-loosening structure, the screw will rotate in the opposite direction and pull out upwards, while driving the core head to rotate and move upwards, causing part of the core head to come out into the cavity, thus making it impossible to lock the cover plate tightly. Summary of the Invention

[0004] The purpose of this invention is to provide a structure to prevent the iron core head of the casting wax mold tree head from detaching, so as to solve the technical problem in the prior art where the iron core head rotates upward and moves, causing part of the iron core head to detach into the cavity, thus making it impossible to lock the cover plate tightly.

[0005] To achieve the above objectives, the present invention provides a casting wax mold tree head iron core head anti-detachment structure, including a wax mold, a mold head at the top of the wax mold, a cavity inside the mold head, a mold head cup at the top of the mold head, a cover plate above the mold head cup, the diameter of the cover plate being larger than the diameter of the mold head cup, and a first through hole in the middle of the cover plate; a vertically extending iron rod inside the wax mold, an iron core head fixed at the top of the iron rod, the iron core head being located at the bottom of the mold head, a threaded hole inside the iron core head, the threaded hole of the iron core head being threadedly connected to the bottom end of a vertically extending first screw, the top end of the first screw passing upward through the cavity, the mold head cup, and the first through hole in sequence; a first nut above the cover plate, the first nut being threadedly connected to the top end of the first screw, the outer diameter of the first nut being larger than the inner diameter of the first through hole; the iron core head being shaped as a vertically extending prism, and a boss being provided on the side wall of the iron core head.

[0006] Furthermore, the bottom end of the iron core head is provided with a base, and the width between the left and right ends of the base is greater than the width between the front and rear ends.

[0007] Furthermore, the sidewall of the base is provided with a boss and a groove.

[0008] Furthermore, the iron core head has protrusions on its four sides, the base has protrusions at its front and rear ends, and the base has grooves at its left and right ends.

[0009] Furthermore, the top of the iron rod is welded and fixed to the base of the iron core head.

[0010] Furthermore, a support plate and a shielding basin are arranged sequentially from bottom to top between the mold head cup and the cover plate. The bottom dimension of the shielding basin is smaller than the top dimension, and the opening of the shielding basin faces upward. The diameter of the support plate is larger than the diameter of the mold head cup, the bottom diameter of the shielding basin is larger than the diameter of the support plate, and the top diameter of the shielding basin is larger than the diameter of the cover plate. The cover plate is located inside the shielding basin. The support plate and the shielding basin are respectively provided with a second through hole and a third through hole in the middle. The top end of the first screw passes through the cavity, the mold head cup, the second through hole, the third through hole, the first through hole, and the first nut in sequence.

[0011] Furthermore, the shielding basin is a plastic shielding basin.

[0012] Furthermore, the bottom dimension of the mold head is smaller than the top dimension.

[0013] Furthermore, the top end of the first screw is provided with a vertically extending limiting post, the diameter of which is larger than the diameter of the first screw.

[0014] Furthermore, the top of the limiting post is provided with a vertically extending second screw, the diameter of the limiting post is larger than the diameter of the second screw, and the second screw is threadedly connected to the second nut.

[0015] In summary, the technical solution of this invention has the following beneficial effects: The structural design of this invention is reasonable. Because the core head in the prior art is cylindrical, the rotational resistance generated between it and the wax mold is friction. However, the core head of this invention is prismatic, resulting in a torque that generates rotational resistance between it and the wax mold. Obviously, the rotational resistance generated by the torque is much greater than that generated by friction. Furthermore, because the sidewall of the core head of this invention has a boss, the displacement resistance of the core head's up-and-down movement is increased. Therefore, even after the first nut is fully tightened, the rotational resistance generated by the torque and the displacement resistance generated by the boss ensure that the core head remains relatively fixed, preventing it from falling out of the cavity. At this time, the iron rod threadedly connected to the core head also remains relatively fixed, thus locking the cover plate. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 This is a structural schematic diagram from the first perspective of the present invention;

[0018] Figure 3 This is a structural schematic diagram from a second perspective of the present invention;

[0019] Figure 4 This is an exploded structural diagram of the present invention;

[0020] Figure 5 yes Figure 4 An enlarged diagram of the first part;

[0021] Figure 6 yes Figure 4 An enlarged schematic diagram of the second part;

[0022] Explanation of reference numerals in the attached drawings: 1-Wax model, 101-Mold head, 102-Cavity, 103-Mold head cup mouth; 2-Cover plate, 201-First through hole; 3-Iron rod; 4-Iron core head, 401-Threaded hole, 402-Base, 403-Groove; 5-First screw, 6-First nut, 7-Boss; 8-Support plate, 801-Second through hole; 9-Shielding basin, 901-Third through hole; 10-Limiting post, 11-Second screw, 12-Second nut. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, but this does not constitute a limitation on the scope of protection of the present invention.

[0024] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1 When conducting observations, the observer's left side is designated as left, the observer's right side as right, the area in front of the observer as front, the area behind the observer as back, the area above the observer as top, and the area below the observer as bottom. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0025] See Figures 1 to 6This embodiment provides a casting wax mold tree head iron core head anti-detachment structure, including a wax mold 1, a mold head 101 at the top of the wax mold 1, a cavity 102 inside the mold head 101, a mold head cup 103 at the top of the mold head 101, a cover plate 2 above the mold head cup 103, the diameter of the cover plate 2 being larger than the diameter of the mold head cup 103, and a first through hole 201 in the middle of the cover plate 2; a vertically extending iron rod 3 is provided inside the wax mold 1, and an iron core head 4 is fixed at the top of the iron rod 3. Located at the bottom end of the die head 101, the iron core head 4 has a threaded hole 401 inside. The threaded hole 401 of the iron core head 4 is threadedly connected to the bottom end of the vertically extending first screw 5. The top end of the first screw 5 passes upward through the cavity 102, the die head cup 103, and the first through hole 201 in sequence. A first nut 6 is provided above the cover plate 2. The first nut 6 is threadedly connected to the top end of the first screw 5. The outer diameter of the first nut 6 is larger than the inner diameter of the first through hole 201. This is so that the cover plate can be locked by tightening the nut downward. The iron core head 4 is shaped as a vertically extending prism, and the side wall of the iron core head 4 has a boss 7. Function: Because the core head in existing technology is cylindrical, the rotational resistance between it and the wax model is friction. However, the core head of this invention is prismatic, resulting in torque as the rotational resistance. Obviously, the rotational resistance caused by torque is much greater than that caused by friction. Furthermore, the protrusions on the sidewalls of the core head increase the displacement resistance during its vertical movement. Therefore, even after the first nut is fully tightened, the core head remains relatively fixed due to the rotational resistance from the torque and the displacement resistance from the protrusions, preventing it from slipping out of the cavity. The threaded iron rod connected to the core head also remains relatively fixed, thus locking the cover plate. It should be noted that the iron rod and core head are added inside the wax model primarily because the weight increases with the number of shell layers after wax assembly, potentially leading to breakage if the weight exceeds the limit. Adding the core head and iron rod helps to distribute the load. For some small, lightweight parts, these components may not be necessary. As mentioned above, the purpose of the cover plate is to prevent the shell-making material from entering, thus creating a cavity identical to the product after shell making. The wax is then melted (lost-wax casting), and molten steel is poured in to form the casting. Furthermore, the rotation of the iron rod will cause the following problems: a) During the shell-making process by the robotic arm, the iron rod will rotate, causing slurry contamination (slurry accumulation during return), and uneven sand application. This results in uneven shell mold thickness and strength, making thin-walled sections prone to breakage during firing / casting, while thick-walled sections may overheat, leading to poor shrinkage in the product; b) During the rotation (loosening) of the iron rod, the mold head cup mouth and the cover plate may collide during the flipping process; c) When switching from a manual to an automatic line, the nut needs to be tightened again, a process that can easily crack the shell mold. Therefore, the iron rod + iron core rod is more important than the wax mold for fixation.

[0026] Specifically, the bottom end of the iron core head 4 is provided with a base 402, and the width between the left and right ends of the base 402 is greater than the width between the front and rear ends. Function: By increasing the length of the two ends of the base, the lever arm increases, the corresponding rotational torque is greater, the rotational resistance is increased, and the displacement resistance of the up and down movement is also greater.

[0027] Specifically, the side wall of the base 402 is provided with a boss 7 and a groove 403. Function: By providing a boss on the base, the displacement resistance of the iron core head moving up and down is further increased; by providing a groove on the base, the rotation resistance of the iron core head is further increased, preventing the iron core head from falling out of the cavity.

[0028] Specifically, the four sides of the iron core head 4 are provided with protrusions 7, the front and rear ends of the base 402 are provided with protrusions 7, and the left and right ends of the base 402 are provided with grooves 403. Function: This design can make the force distribution more reasonable. Of course, changing the size, position and number of protrusions and grooves can also achieve a similar effect. The specific structure can be set according to actual needs.

[0029] Specifically, the top of the iron rod 3 is welded and fixed to the base 402 of the iron core head 4. In actual use, the base of the iron core head and the iron rod are welded together. The first screw (or the screw of the hook) is screwed into the iron core head to form a whole. This makes it easier to operate and provides a grip. Secondly, it strengthens the structure and makes it less prone to deformation and breakage when flipped during the coating and sanding operations in the shell making process.

[0030] Specifically, a support plate 8 and a shielding basin 9 are arranged sequentially from bottom to top between the mold head cup 103 and the cover plate 2. The bottom dimension of the shielding basin 9 is smaller than the top dimension, and the opening of the shielding basin 9 faces upward. The diameter of the support plate 8 is larger than the diameter of the mold head cup 103, the bottom diameter of the shielding basin 9 is larger than the diameter of the support plate 8, and the top diameter of the shielding basin 9 is larger than the diameter of the cover plate 2. The cover plate 2 is located inside the shielding basin 9. The support plate 8 and the shielding basin 9 are respectively provided with a second through hole 801 and a third through hole 901 in the middle. The top end of the first screw 5 passes through the cavity 102, the mold head cup 103, the second through hole 801, the third through hole 901, the first through hole 201, and the first nut 6 in sequence. Function: The shielding basin can prevent the screw connected to external machinery from getting dirty during the slurry application process; while the support plate and the cover plate can jointly clamp and fix the bottom wall of the shielding basin.

[0031] Specifically, the shielding basin 9 is a plastic shielding basin.

[0032] Specifically, the bottom dimension of the mold head 101 is smaller than the top dimension.

[0033] Specifically, the top end of the first screw 5 is provided with a vertically extending limiting post 10, the diameter of which is larger than the diameter of the first screw 5. Function: The limiting post can limit the upward movement of the first nut.

[0034] Specifically, the top of the limiting post 10 is provided with a vertically extending second screw 11. The diameter of the limiting post 10 is larger than the diameter of the second screw 11, and the second screw 11 is threadedly connected to the second nut 12. Function: The limiting post can limit the downward movement of the second nut.

[0035] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A casting wax mold tree head iron core head anti-detachment structure, comprising a wax mold (1), wherein the top of the wax mold (1) is provided with a mold head (101), the interior of the mold head (101) is provided with a cavity (102), the top of the mold head (101) is provided with a mold head cup mouth (103), a cover plate (2) is provided above the mold head cup mouth (103), the diameter of the cover plate (2) is larger than the diameter of the mold head cup mouth (103), and a first through hole (201) is provided in the middle of the cover plate (2); a vertically extending iron rod (3) is provided inside the wax mold (1), and an iron core head (4) is fixed at the top of the iron rod (3). The iron core head (4) is located at the bottom end of the mold head (101). The iron core head (4) has a threaded hole (401) inside. The threaded hole (401) of the iron core head (4) is threadedly connected to the bottom end of the vertically extending first screw (5). The top end of the first screw (5) passes through the cavity (102), the mold head cup mouth (103), and the first through hole (201) sequentially. A first nut (6) is provided above the cover plate (2). The first nut (6) is threadedly connected to the top end of the first screw (5). The outer diameter of the first nut (6) is larger than the inner diameter of the first through hole (201). The characteristic of the following is: The core head (4) is shaped as a vertically extending prism, and the side wall of the core head (4) is provided with a boss (7). The bottom end of the iron core head (4) is provided with a base (402), and the width between the left and right ends of the base (402) is greater than the width between the front and rear ends. The base (402) has a boss (7) and a groove (403) on its side wall. The iron core head (4) has protrusions (7) on its four sides, and the base (402) has protrusions (7) at its front and rear ends, and grooves (403) at its left and right ends. The top of the iron rod (3) is welded and fixed to the base (402) of the iron core head (4); Between the mold head cup opening (103) and the cover plate (2), there are a support plate (8) and a shielding basin (9) arranged sequentially from bottom to top. The bottom dimension of the shielding basin (9) is smaller than the top dimension, and the opening direction of the shielding basin (9) is upward. The diameter of the support plate (8) is larger than the diameter of the mold head cup opening (103), the bottom diameter of the shielding basin (9) is larger than the diameter of the support plate (8), and the top diameter of the shielding basin (9) is larger than the diameter of the cover plate (2). The cover plate (2) is located inside the shielding basin (9). The support plate (8) and the shielding basin (9) are respectively provided with a second through hole (801) and a third through hole (901). The top end of the first screw (5) passes through the cavity (102), the mold head cup opening (103), the second through hole (801), the third through hole (901), the first through hole (201), and the first nut (6) in sequence. The shielding basin (9) is a plastic shielding basin.

2. The anti-detachment structure for the iron core head of the casting wax mold tree as described in claim 1, characterized in that: The bottom dimension of the mold head (101) is smaller than the top dimension.

3. The anti-detachment structure for the iron core head of the casting wax mold tree as described in claim 1, characterized in that: The top end of the first screw (5) is provided with a vertically extending limiting post (10), the diameter of which is larger than the diameter of the first screw (5).

4. The anti-detachment structure for the iron core head of the casting wax mold tree as described in claim 3, characterized in that: The top of the limiting post (10) is provided with a vertically extending second screw (11). The diameter of the limiting post (10) is larger than the diameter of the second screw (11). The second screw (11) is threadedly connected to the second nut (12).

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