Wax injection gun capable of preventing gun nozzle from being solidified and blocked

Abstract

The utility model discloses a wax injection gun capable of avoiding solidification and blockage of a gun nozzle, which comprises a gun body with a wax injection cavity and a heat preservation structure, a piston rod arranged in the wax injection cavity, the wax injection nozzle arranged at the end part of the gun body and a plugging head arranged at the end part of the piston rod, a wax inlet is formed in the gun body, a gap allowing wax liquid to pass through is formed between the piston rod and the cavity wall of the wax injection cavity, a wax injection channel is formed in the wax injection nozzle, and when the plugging head completely stretches into the wax injection channel, the end part of the plugging head completely fills the end part of the outlet end of the wax injection channel to plug the wax injection channel and push out the wax liquid at the end part of the wax injection channel. The plugging position of the plugging head is arranged at the outlet end of the wax injection channel, the end portion of the outer end of the wax injection channel is completely filled during plugging, cerate in the area is completely discharged, and the situation that the residual cerate makes contact with air for a long time, the temperature is lowered, and solidification and plugging occur is avoided.

Description

Technical Field

[0001] This utility model relates to wax injection guns, and more particularly to wax injection guns that can prevent the nozzle from solidifying and clogging. Background Technology

[0002] Wax injection machines are mostly used in precision casting. The precision casting process generally includes wax injection, welding, slurry application, sanding, drying, dewaxing, sintering, and casting. Among these, the wax injection process involves injecting molten wax into a mold made according to the shape and size of the product, which then solidifies to form a wax part. The wax injection process requires a wax injection gun.

[0003] Patent application number 2014203717702 discloses the mechanical mechanism of the wax injection valve body of a wax injection machine, as shown in its specification appended to the patent application. Figure 1 As shown, when the piston rod extends outward to block the inner end of the wax injection nozzle, the opening at the top of the wax injection nozzle is closed. When wax is injected, the piston rod retracts to open the opening at the top of the wax injection nozzle for wax injection.

[0004] Since wax injection guns are generally equipped with heat preservation structures, the wax paste will not solidify inside the wax injection gun. However, the wax injection nozzle is located outside the wax injection gun, so the temperature will drop when wax injection stops. In the aforementioned patent, the piston rod cannot expel the wax paste inside the wax injection nozzle when sealing the opening, resulting in wax paste remaining inside the wax injection nozzle. When the temperature of the wax injection nozzle drops, it solidifies, causing blockage of the wax injection nozzle and affecting the next wax injection. Utility Model Content

[0005] The limitations of existing wax nozzle structures lead to wax residue on the nozzle, which solidifies when the temperature drops, thus affecting the next waxing operation. This invention provides a wax injection gun that can avoid nozzle solidification and clogging.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A wax injection gun that can prevent nozzle solidification and clogging includes a gun body with a wax injection chamber and a heat insulation structure, a piston rod disposed in the wax injection chamber, a wax injection nozzle disposed at the end of the gun body, and a sealing head disposed at the end of the piston rod. The gun body has a wax inlet and a gap for wax paste to pass through is provided between the piston rod and the wall of the wax injection chamber. The wax injection nozzle has a wax injection channel inside. When the sealing head is fully inserted into the wax injection channel, its end part completely fills the end part of the wax injection channel outlet, forming a seal on the wax injection channel and pushing out the wax paste at the end of the wax injection channel.

[0008] Preferably, the outer end of the wax injection channel has a venting cavity with a diameter that gradually decreases from the inside to the outside. The outer end of the sealing head is a sealing part that matches the shape of the venting cavity. When the sealing part extends into the venting cavity and completely fills the venting cavity, it forms a seal and completely removes the wax paste from the venting cavity.

[0009] Preferably, the venting cavity is a frustum-shaped hole, and the sealing part is a frustum-shaped plug that matches the shape of the frustum-shaped hole. The frustum-shaped plug has a gap with the wax injection channel before it is fully inserted into the wax injection channel.

[0010] Preferably, the venting cavity is a frustum-shaped hole with a cross-sectional area decreasing from the inside to the outside, and the sealing part is a frustum-shaped plug that matches the shape of the frustum-shaped hole. The frustum-shaped plug has a gap with the wax injection channel before it is fully inserted into the wax injection channel.

[0011] Preferably, the venting cavity is a hemispherical hole, and the sealing part is a hemispherical plug that matches the shape of the hemispherical hole. The hemispherical plug has a gap with the wax injection channel before it is fully inserted into the wax injection channel.

[0012] Preferably, the sealing head has a retaining part at its inner end, which is a straight rod that fits against the inner wall of the wax injection channel and has a groove on the rod that connects the wax injection cavity and the wax injection channel.

[0013] Preferably, the rod is a rod with a unique cross-sectional shape, and the groove is a strip-shaped groove formed on the side wall of the rod and extending along the length of the rod.

[0014] Preferably, the heat insulation structure includes a heat insulation shell disposed outside the gun body and enclosing the gun body, a heat insulation cavity is formed between the heat insulation shell and the outer wall of the cavity, and the heat insulation shell is provided with an inlet pipe and an outlet pipe communicating with the heat insulation cavity, the inlet pipe and the outlet pipe being used for the inlet and outlet of the heat medium, respectively.

[0015] Preferably, the device also includes a translation mechanism comprising a slide rail, a slider mounted on the slide rail, and a telescopic drive mechanism. The output end of the telescopic drive mechanism is connected to the slider, and the slider is provided with a clamping structure for clamping the gun body or the heat insulation shell.

[0016] Preferably, the wax injection nozzle is threaded to the end of the gun body.

[0017] Compared with the prior art, the advantages of this utility model are as follows: By setting the sealing position of the sealing head at the outlet end of the wax injection channel, the outer end of the wax injection channel is completely filled during sealing, and the wax paste in that area is completely discharged, thus avoiding the situation where residual wax paste in that area causes blockage when the temperature drops. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is the front view of this application;

[0020] Figure 2 These are cross-sectional views of Examples 1-3;

[0021] Figure 3 This is a perspective view of the present application;

[0022] Figure 4 This is the front view of the gun body;

[0023] Figure 5 This is a sectional view of the gun body;

[0024] Figure 6 This is an exploded view of the gun.

[0025] In the diagram: 10. Gun body; 101. Wax inlet; 20. Piston rod; 30. Sealing head; 301. Sealing part; 302. Holding part; 303. Groove; 40. Wax injection nozzle; 401. Wax injection channel; 4011. Exhaust cavity; 50. Insulation shell; 60. Piston cylinder; 701. Slide rail; 702. Slider; 703. Telescopic drive mechanism; 80. Clamping structure; 901. Liquid inlet pipe; 902. Liquid outlet pipe. Detailed Implementation

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0028] Example 1:

[0029] This embodiment mainly describes the title of the wax injection gun that can avoid nozzle solidification and clogging, as follows:

[0030] A wax injection gun designed to prevent nozzle solidification and clogging includes a gun body 10 with a wax injection chamber and a heat insulation structure, a piston rod 20 disposed within the wax injection chamber, a wax injection nozzle 40 disposed at the end of the gun body 10, and a sealing head 30 disposed at the end of the piston rod 20. The gun body 10 has a wax inlet 101, and a gap is provided between the piston rod 20 and the wall of the wax injection chamber to allow wax paste to pass through. The wax injection nozzle 40 has a wax injection channel 401 inside. When the sealing head 30 is fully inserted into the wax injection channel 401, its end portion completely fills the outlet end of the wax injection channel 401, thus sealing the wax injection channel 401 and discharging the wax paste from the end of the wax injection channel 401. In this design, by positioning the sealing head 30 at the outlet end of the wax injection channel 401 and completely filling the outer end of the wax injection channel 401 during sealing, the wax paste in that area is completely discharged, preventing residual wax paste from causing clogging when the temperature decreases.

[0031] Preferably, the inner end of the sealing head 30 is provided with a retaining part 302, which is a straight rod. The rod fits against the inner wall of the wax injection channel 401, and the rod has a groove 303 that connects the wax injection cavity and the wax injection channel 401. In this design, the retaining part 302 fits against the wax injection channel 401 to form a support, which can ensure the positional accuracy of the piston rod 20 during extension and retraction, while the groove 303 is used to form a gap to allow the wax paste to pass through.

[0032] Preferably, the rod has a unique cross-sectional shape, and the groove 303 is a strip-shaped groove formed on the side wall of the rod and extending along the length of the rod. The rod can be cylindrical, square, or have an elliptical, triangular, or polygonal cross-section.

[0033] Insulation structure for wax injection gun :

[0034] Preferably, the insulation structure includes an insulation shell 50 disposed outside the gun body 10 and enclosing the gun body 10. An insulation cavity 501 is formed between the insulation shell 50 and the outer wall of the cavity. The insulation shell 50 is provided with an inlet pipe 901 and an outlet pipe 902 communicating with the insulation cavity 501. The inlet pipe 901 and the outlet pipe 902 are used for the inlet and outlet of the heat medium, respectively. This solution, by setting up an insulation structure, [achieves a certain effect].

[0035] Wax gun moving structure :

[0036] It also includes a translation mechanism comprising a slide rail 701, a slider 702 mounted on the slide rail 701, and a telescopic drive mechanism 703. The output end of the telescopic drive mechanism 703 is connected to the slider 702, and the slider 702 is provided with a clamping structure 80 for clamping the gun body 10 or the heat insulation shell 50. The telescopic drive mechanism 703 is a push rod motor or a cylinder.

[0037] Wax nozzle 40 mounting structure :

[0038] Preferably, the wax nozzle 40 is threaded to the end of the gun body 10.

[0039] Example 2:

[0040] This embodiment mainly describes the title of the wax injection gun that can avoid nozzle solidification and clogging, as follows:

[0041] Based on Example 1, the outer end of the wax injection channel 401 has a gradually decreasing diameter venting cavity 4011. The outer end of the sealing head 30 is a sealing part 301 that matches the shape of the venting cavity 4011. When the sealing part 301 extends into the venting cavity 4011 and completely fills the venting cavity 4011, it forms a seal and completely removes the wax paste inside the venting cavity 4011. In this design, the diameter of the venting cavity 4011 gradually decreases from the inside to the outside, which provides the sealing part 301 with the conditions to abut against the seal and fill the venting cavity 4011, so that the wax paste inside the venting cavity 4011 is completely discharged while sealing.

[0042] Example 3:

[0043] This embodiment mainly describes the title of the wax injection gun that can avoid nozzle solidification and clogging, as follows:

[0044] Based on Example 2, the venting cavity is configured as a frustum-shaped hole, and the sealing part 301 is a frustum-shaped plug that matches the shape of the frustum-shaped hole. The frustum-shaped plug has a gap with the wax injection channel 401 before it is fully inserted into the wax injection channel 401.

[0045] Example 4:

[0046] This embodiment mainly describes the title of the wax injection gun that can avoid nozzle solidification and clogging, as follows:

[0047] Based on Example 2, the venting cavity is configured as a frustum-shaped hole with a cross-sectional area decreasing from the inside to the outside, and the sealing part is a frustum-shaped plug that matches the shape of the frustum-shaped hole. The frustum-shaped plug has a gap with the wax injection channel before it is fully inserted into the wax injection channel.

[0048] Example 5:

[0049] This embodiment mainly describes the title of the wax injection gun that can avoid nozzle solidification and clogging, as follows:

[0050] Based on Example 2, the venting cavity is configured as a hemispherical hole, and the sealing part is a hemispherical plug that matches the shape of the hemispherical hole. The hemispherical plug has a gap with the wax injection channel before it is fully inserted into the wax injection channel.

[0051] It should be noted that embodiments 3-5 are specific solutions based on embodiment 2, and the accompanying drawings in the specification illustrate embodiments 1-3; the piston rod 20 is driven by the piston cylinder 60, and the clamping structure 80 is a clamp-type fixture.

[0052] The title provided above provides a detailed description of the present utility model. Specific examples have been used to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only for the purpose of helping to understand the present utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present utility model without departing from the principles of the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A wax injection gun that prevents nozzle solidification and clogging, comprising a gun body with a wax injection chamber and a heat insulation structure, a piston rod disposed within the wax injection chamber, a wax injection nozzle disposed at the end of the gun body, and a sealing head disposed at the end of the piston rod, wherein the gun body has a wax inlet and a gap for wax paste to pass through is provided between the piston rod and the wall of the wax injection chamber, characterized in that: The wax injection nozzle has a wax injection channel inside. When the sealing head is fully inserted into the wax injection channel, its end part completely fills the end part of the wax injection channel outlet, forming a seal on the wax injection channel and expelling the wax paste from the end of the wax injection channel.

2. The wax injection gun as claimed in claim 1, wherein: The outer end of the wax injection channel has a venting cavity whose diameter gradually decreases from the inside to the outside. The outer end of the sealing head is a sealing part that matches the shape of the venting cavity. When the sealing part extends into the venting cavity and completely fills the venting cavity, it forms a seal and completely removes the wax paste in the venting cavity.

3. The wax injection gun according to claim 1 or 2, wherein: The venting cavity is a frustum-shaped hole, and the sealing part is a frustum-shaped plug that matches the shape of the frustum-shaped hole. There is a gap between the frustum-shaped plug and the wax injection channel before the frustum-shaped plug is fully inserted into the wax injection channel.

4. The wax injection gun according to claim 1 or 2 that avoids nozzle solidification and clogging, characterized in that: The venting cavity is a frustum-shaped hole with a cross-sectional area decreasing from the inside to the outside. The sealing part is a frustum-shaped plug that matches the shape of the frustum-shaped hole. There is a gap between the frustum-shaped plug and the wax injection channel before the frustum-shaped plug is fully inserted into the wax injection channel.

5. The wax injection gun according to claim 1 or 2, wherein: The venting cavity is a hemispherical hole, and the sealing part is a hemispherical plug that matches the shape of the hemispherical hole. There is a gap between the hemispherical plug and the wax injection channel before the hemispherical plug is fully inserted into the wax injection channel.

6. The wax injection gun as claimed in claim 2, wherein: The sealing head has a retaining part at its inner end. The retaining part is a straight rod that fits against the inner wall of the wax injection channel and has a groove on the rod that connects the wax injection cavity and the wax injection channel.

7. The wax injection gun as claimed in claim 6, wherein: The rod is a rod with a unique cross-sectional shape, and the groove is a strip-shaped groove opened on the side wall of the rod and extending along the length of the rod.

8. The wax injection gun according to claim 1 that avoids nozzle solidification and clogging, characterized in that: The thermal insulation structure includes a thermal insulation shell disposed outside the gun body and enclosing the gun body. A thermal insulation cavity is formed between the thermal insulation shell and the outer wall of the cavity. The thermal insulation shell is provided with an inlet pipe and an outlet pipe that communicate with the thermal insulation cavity. The inlet pipe and the outlet pipe are used for the inlet and outlet of the heat medium, respectively.

9. The wax injection gun of claim 1, wherein: It also includes a translation mechanism, which includes a slide rail, a slider mounted on the slide rail, and a telescopic drive mechanism. The output end of the telescopic drive mechanism is connected to the slider, and the slider is provided with a clamping structure for clamping the gun body or the heat insulation shell.

10. The wax injection gun of claim 1, wherein: The wax injection nozzle is threaded onto the end of the gun body.

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