Wax injection mechanism of a wax injection machine

Abstract

This utility model relates to the field of wax injection machine technology, specifically a wax injection mechanism for a wax injection machine. It includes a wax delivery tube, with a wax injection tube threadedly connected to the bottom end of the delivery tube. A wax injection head is located at the bottom end of the injection tube. An upper annular limiting member is fixedly installed on the outer wall of the bottom end of the delivery tube, and a lower annular limiting member is fixedly installed on the outer wall of the top end of the injection tube. This wax injection mechanism utilizes the cooperation of the delivery tube, injection tube, upper annular limiting member, positioning groove, lower annular limiting member, sealing gasket, wing nut, mounting groove, and positioning rod. The injection tube is threadedly connected to the delivery tube, and the sealing gasket is fitted onto the outer wall of the injection tube. When the injection tube is tightened, the sealing gasket adheres to the upper and lower annular limiting members, ensuring a tight seal at the connection. The positioning rod engages with the positioning groove and the wing nut is tightened, achieving self-locking of the threaded connection, limiting relative rotation, and improving connection stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of wax injection machine technology, specifically to a wax injection mechanism for a wax injection machine. Background Technology

[0002] The wax injection machine is a key piece of equipment used in the investment casting process to manufacture wax patterns. The wax injection mechanism, as the core component of the wax injection machine, directly affects the quality of the wax pattern and production efficiency.

[0003] Chinese Patent No. CN219484112U discloses a wax injection mechanism for a wax injection machine. It includes a variable diameter tube, with a first connecting tube nested on the outer surface of the variable diameter tube and a second connecting tube threaded to the lower end of the variable diameter tube. A wax injection tube is movably embedded inside the variable diameter tube. This invention avoids the problem of the wax injection tube being unable to contract and being damaged by stress when it collides with the mold while the wax delivery tube is descending. This prevents damage to the wax injection tube, which would affect the wax injection effect. Furthermore, it combines the extension and retraction of the wax injection tube with its discharge, facilitating automatic material feeding.

[0004] Regarding the aforementioned technologies, this device has some shortcomings. In actual use, the No. 1 connecting pipe and the wax delivery pipe are connected by threads. Although the threaded connection has a certain degree of sealing, during long-term use, pressure fluctuations when the wax is delivered by the wax injection machine may cause wax leakage at the threaded connection. Therefore, it is necessary to provide a wax injection mechanism for the wax injection machine to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a wax injection mechanism for a wax injection machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A wax injection mechanism for a wax injection machine, comprising:

[0008] A wax delivery tube is provided with a wax injection tube threaded to its bottom end. A wax injection head is provided at the bottom end of the wax injection tube. An upper annular limiting member is fixedly installed on the outer wall of the bottom end of the wax delivery tube, and a lower annular limiting member is fixedly installed on the outer wall of the top end of the wax injection tube. A sealing gasket is provided between the upper annular limiting member and the lower annular limiting member.

[0009] The lower annular limiting member has an installation groove on its outer surface, and the upper annular limiting member has a plurality of positioning grooves evenly spaced on its outer surface. A positioning rod is hinged to the installation groove and is adapted to the positioning groove. A wing nut is threaded onto the outer wall of the positioning rod.

[0010] Preferably, a fixing bracket is fixedly installed on the outer wall of the wax injection tube, and an inner box is fixedly installed on the lower side of the inner wall of the wax injection tube. A through groove corresponding to the position of the inner box is opened on the outer wall of the wax injection tube, and the through groove is connected to the interior of the inner box. A moving block is slidably installed inside the inner box. A connecting arm is fixedly installed at the bottom of the moving block, and the bottom end of the connecting arm passes through the inner box and extends to the connection between the wax injection tube and the wax injection head. A sealing plug is fixedly installed at the bottom end of the connecting arm, and the sealing plug slides in contact with the inner wall of the wax injection head. A driving mechanism is provided on the fixing bracket.

[0011] Preferably, the driving mechanism includes a cylinder, which is fixedly mounted on the top of the fixed frame. One end of the moving block passes through the through slot and extends into the interior of the fixed frame. The driving end of the cylinder passes through the fixed frame and is fixedly connected to the top of the moving block.

[0012] Preferably, a sealing sleeve is fixedly embedded in the bottom of the built-in housing, and the sealing sleeve is slidably connected to the connecting arm.

[0013] Preferably, the fixed frame has symmetrically distributed stabilizing rods fixedly installed inside, and the movable block has sliding holes corresponding to the position and number of stabilizing rods, and the movable block is slidably connected to the stabilizing rods through the sliding holes.

[0014] Preferably, the top of the sealing plug is conical.

[0015] Preferably, the inner diameter of the wax injection tube is larger than the inner diameter of the wax injection head.

[0016] Preferably, the inner diameter of the sealing gasket is adapted to the outer diameter of the wax injection tube.

[0017] Preferably, the size of the winged nut is larger than the size of the positioning groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model utilizes the combined use of a wax delivery tube, a wax injection tube, an upper annular limiting component, a positioning groove, a lower annular limiting component, a sealing gasket, a wing nut, a mounting groove, and a positioning rod. The wax injection tube is threadedly connected to the wax delivery tube. The sealing gasket is fitted onto the outer wall of the wax injection tube. When the wax injection tube is tightened, the sealing gasket adheres to the upper and lower annular limiting components, ensuring a tight seal at the connection. The positioning rod engages with the positioning groove and the wing nut is tightened, achieving a self-locking threaded connection, limiting relative rotation, and improving connection stability and reliability. Combined with the sealing effect, wax leakage is prevented, enhancing the stability of the wax injection mechanism.

[0020] 2. This utility model utilizes a combination of a fixed frame, a through groove, a stabilizing rod, a moving block, a cylinder, an internal housing, a connecting arm, and a sealing plug. During wax injection, the wax delivery pipe and the wax injection pipe work together, and the cylinder drives the sealing plug to move, achieving wax injection and sealing. During wax injection, the sealing plug moves upward, and the wax flows through the gap into the wax injection head and into the mold; after wax injection, the sealing plug moves downward to seal the wax injection head, cutting off the wax flow at the source, preventing wax dripping, ensuring the cleanliness of the mold and machine table, reducing cleaning, and improving the automated production cycle and product cleanliness. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded structural diagram of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of the present invention.

[0024] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Wax delivery tube; 2. Wax injection tube; 3. Wax injection head; 4. Upper annular limiting component; 5. Positioning groove; 6. Lower annular limiting component; 7. Fixing frame; 8. Through groove; 9. Stabilizing rod; 10. Moving block; 11. Cylinder; 12. Sealing gasket; 13. Internal housing; 14. Connecting arm; 15. Sealing plug; 16. Wing nut; 17. Mounting groove; 18. Positioning rod. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-4 One embodiment provided by this utility model:

[0028] A wax injection mechanism for a wax injection machine, comprising:

[0029] Wax delivery tube 1, wax delivery tube 1 is threaded to the bottom end of wax delivery tube 1 and wax injection tube 2 is provided at the bottom end of wax injection tube 2 and wax injection head 3 is provided at the bottom end of wax delivery tube 1. An upper annular limiting member 4 is fixedly installed on the outer wall of the bottom end of wax delivery tube 1 and a lower annular limiting member 6 is fixedly installed on the outer wall of the top end of wax injection tube 2. A sealing gasket 12 is provided between the upper annular limiting member 4 and the lower annular limiting member 6.

[0030] An installation groove 17 is provided on the outer surface of the lower annular limiting member 6, and several positioning grooves 5 are provided at equal intervals and evenly on the outer surface of the upper annular limiting member 4. A positioning rod 18 is hinged to the installation groove 17, and the positioning rod 18 is adapted to the positioning groove 5. A wing nut 16 is threaded on the outer wall of the positioning rod 18.

[0031] A fixing bracket 7 is fixedly installed on the outer wall of the wax injection tube 2. An inner box 13 is fixedly installed on the lower side of the inner wall of the wax injection tube 2. A through groove 8 corresponding to the position of the inner box 13 is opened on the outer wall of the wax injection tube 2, and the through groove 8 is connected to the inside of the inner box 13. A moving block 10 is slidably installed inside the inner box 13. A connecting arm 14 is fixedly installed at the bottom of the moving block 10, and the bottom end of the connecting arm 14 passes through the inner box 13 and extends to the connection between the wax injection tube 2 and the wax injection head 3. A sealing plug 15 is fixedly installed at the bottom end of the connecting arm 14, and the sealing plug 15 slides in contact with the inner wall of the wax injection head 3. A driving mechanism is provided on the fixing bracket 7.

[0032] In one embodiment, the drive mechanism includes a cylinder 11, which is fixedly mounted on the top of the fixed frame 7. One end of the moving block 10 passes through the through slot 8 and extends into the interior of the fixed frame 7. The drive end of the cylinder 11 passes through the fixed frame 7 and is fixedly connected to the top of the moving block 10, which can precisely control the movement of the moving block 10 within the fixed frame 7 to meet the operating requirements of the device.

[0033] In one preferred embodiment, a sealing sleeve is fixedly installed at the bottom of the built-in housing 13, and the sealing sleeve is slidably connected to the connecting arm 14. The sealing sleeve allows the connecting arm 14 to slide smoothly, while ensuring the airtightness of the built-in housing 13 to prevent foreign objects from entering and internal media from leaking.

[0034] In one embodiment, symmetrically distributed stabilizing rods 9 are fixedly installed inside the fixed frame 7. The moving block 10 has sliding holes corresponding to the position and number of stabilizing rods 9. The moving block 10 is slidably connected to the stabilizing rods 9 through the sliding holes, which ensures that the moving block 10 moves smoothly, prevents shaking and deviation, and improves the operating stability of the device.

[0035] In one preferred embodiment, the top of the sealing plug 15 is conical, which facilitates the smooth flow of wax along the conical surface into the wax injection head 3 and avoids wax accumulation.

[0036] In one embodiment, the inner diameter of the wax injection tube 2 is larger than the inner diameter of the wax injection head 3, which facilitates the smooth flow and buffering of the wax material in the wax injection tube 2. During wax injection, a pressure difference can be formed in the wax injection head 3, so that the wax material can be injected into the mold more efficiently and accurately.

[0037] In one preferred embodiment, the inner diameter of the sealing gasket 12 is adapted to the outer diameter of the wax injection tube 2, ensuring that the sealing gasket 12 can be tightly fitted onto the outer wall of the wax injection tube 2, thereby enhancing the sealing performance at the connection between the wax delivery tube 1 and the wax injection tube 2.

[0038] In one embodiment, the size of the wing nut 16 is larger than the size of the positioning groove 5, ensuring that the wing nut 16 can stably abut against the top of the upper annular limiting member 4 when tightened, preventing the positioning rod 18 from coming out of the positioning groove 5, and enhancing the stability and reliability of the connection between the wax delivery tube 1 and the wax injection tube 2.

[0039] The working principle of this utility model is as follows: In use, the wax injection tube 2 is first threadedly connected to the bottom end of the wax delivery tube 1 through the threaded groove on its top outer wall, and the sealing gasket 12 is fitted onto the outer wall of the wax injection tube 2. As the wax injection tube 2 is tightened, the sealing gasket 12 fits tightly between the lower annular limiting member 6 and the upper annular limiting member 4, thereby ensuring the sealing performance at the connection between the wax delivery tube 1 and the wax injection tube 2. At the same time, the positioning rod 18 on the lower annular limiting member 6 is rotated, causing it to flip upward and engage with the corresponding positioning groove 5 on the upper annular limiting member 4. Then, the wing nut 16 on the outer wall of the positioning rod 18 is tightened, so that the wing nut 16 tightly abuts against the top of the upper annular limiting member 4. Through the engagement and positioning of the positioning rod 18 and the positioning groove 5, the relative rotation between the upper annular limiting member 4 and the lower annular limiting member 6 is effectively restricted, realizing the self-locking function of the threaded connection between the wax delivery tube 1 and the wax injection tube 2, thereby improving the stability and reliability of the connection between the wax delivery tube 1 and the wax injection tube 2. Combined with the sealing effect of the sealing gasket 12, wax leakage at the connection between the wax delivery tube 1 and the wax injection tube 2 can be effectively avoided, thus improving the stability of the wax injection mechanism.

[0040] During the wax injection operation, the wax injection machine delivers wax material to the wax injection tube 2 via the wax delivery tube 1. During wax injection, the wax delivery tube 1 descends, bringing the wax injection head 3 at the bottom of the wax injection tube 2 into contact with the mold. Simultaneously, the control cylinder 11 is activated, and its drive end moves the moving block 10 vertically. The displacement of the moving block 10 is transmitted to the sealing plug 15 via the connecting arm 14, causing the sealing plug 15 to move upwards, from inside the wax injection head 3 into the wax injection tube 2, thereby releasing the sealing plug 15 from blocking the wax injection head 3. At this time, the wax material in the wax injection tube 2 flows into the wax injection head 3 through the gap between the sealing plug 15 and the wax injection tube 2, and is then injected into the mold by the wax injection head 3, completing the wax injection operation into the mold. After the wax injection operation is completed, the sealing plug 15 is moved downward again to seal the wax injection head 3, cutting off the wax flow at the source and preventing the wax material in the wax injection tube 2 from dripping due to residual pressure and gravity. This ensures the cleanliness of the mold working surface and the machine table, reduces the need for frequent cleaning, and improves the automated production cycle and product cleanliness.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wax injection mechanism for a wax injection machine, characterized in that, It includes: A wax delivery tube (1) is threaded to the bottom end of the wax delivery tube (1) and a wax injection tube (2) is threaded to the bottom end of the wax injection tube (2). A wax injection head (3) is provided at the bottom end of the wax delivery tube (1). An upper annular limiting member (4) is fixedly installed on the outer wall of the bottom end of the wax delivery tube (1). A lower annular limiting member (6) is fixedly installed on the outer wall of the top end of the wax injection tube (2). A sealing gasket (12) is provided between the upper annular limiting member (4) and the lower annular limiting member (6). The lower annular limiting member (6) has an installation groove (17) on its outer surface. The upper annular limiting member (4) has several positioning grooves (5) that are evenly spaced on its outer surface. A positioning rod (18) is hinged to the installation groove (17) and is adapted to the positioning groove (5). A wing nut (16) is threaded onto the outer wall of the positioning rod (18).

2. The wax injection mechanism of a wax injection machine according to claim 1, characterized in that: A fixing bracket (7) is fixedly installed on the outer wall of the wax injection tube (2). An inner box (13) is fixedly installed on the lower side of the inner wall of the wax injection tube (2). A through groove (8) corresponding to the position of the inner box (13) is opened on the outer wall of the wax injection tube (2), and the through groove (8) is connected to the inside of the inner box (13). A moving block (10) is slidably installed inside the inner box (13). A connecting arm (14) is fixedly installed at the bottom of the moving block (10), and the bottom end of the connecting arm (14) passes through the inner box (13) and extends to the connection between the wax injection tube (2) and the wax injection head (3). A sealing plug (15) is fixedly installed at the bottom end of the connecting arm (14), and the sealing plug (15) slides in contact with the inner wall of the wax injection head (3). A driving mechanism is provided on the fixing bracket (7).

3. The wax injection mechanism of a wax injection machine according to claim 2, characterized in that: The driving mechanism includes a cylinder (11), and the cylinder (11) is fixedly installed on the top of the fixed frame (7). One end of the moving block (10) passes through the through slot (8) and extends into the interior of the fixed frame (7). The driving end of the cylinder (11) passes through the fixed frame (7) and is fixedly connected to the top of the moving block (10).

4. The wax injection mechanism of a wax injection machine according to claim 2, characterized in that: The bottom of the built-in box (13) is fixedly fitted with a sealing slide sleeve, and the sealing slide sleeve is slidably connected to the connecting arm (14).

5. The wax injection mechanism of a wax injection machine according to claim 2, characterized in that: The fixed frame (7) is fixedly installed with symmetrically distributed stabilizing rods (9). The moving block (10) has sliding holes corresponding to the position and number of stabilizing rods (9), and the moving block (10) is slidably connected to the stabilizing rods (9) through the sliding holes.

6. The wax injection mechanism of a wax injection machine according to claim 2, characterized in that: The top of the sealing plug (15) is conical.

7. The wax injection mechanism of a wax injection machine according to claim 1, characterized in that: The inner diameter of the wax injection tube (2) is larger than the inner diameter of the wax injection head (3).

8. The wax injection mechanism of a wax injection machine according to claim 1, characterized in that: The inner diameter of the sealing gasket (12) is matched with the outer diameter of the wax injection tube (2).

9. The wax injection mechanism of a wax injection machine according to claim 1, characterized in that: The size of the wing nut (16) is larger than the size of the positioning groove (5).

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