Cleaning structure for low-pressure feeding gun of foaming machine

Abstract

The utility model relates to a cleaning structure for a low-pressure feeding gun of a foaming machine, and belongs to the field of foaming forming equipment, the cleaning structure comprises a mixing barrel and a spray gun, the lower end of the mixing barrel is connected with the spray gun, a stirring body is coaxially and rotatably arranged in the mixing barrel, the cleaning structure further comprises a cleaning pipe, and the cleaning pipe is communicated with an inner cavity of the mixing barrel. And the cleaning pipe is used for spraying cleaning liquid into the mixing cylinder. After charging is completed, the inner cavity of the mixing barrel and the inner cavity of the spray gun are cleaned and air-dried through cleaning liquid and airflow, and raw material residues in the mixing barrel and the inner cavity of the spray gun are reduced.

Description

Technical Field

[0001] The present application relates to the field of foaming molding equipment, and in particular to a low-pressure feeding gun cleaning structure for a foaming machine. Background Art

[0002] In the foaming process or foaming polymer materials, a honeycomb or porous structure is formed by adding and reacting physical or chemical foaming agents. The basic steps of foaming are the formation of the bubble nucleus, the growth or expansion of the bubble nucleus, and the stabilization of the bubble nucleus. Under given temperature and pressure conditions, the solubility of the gas decreases, so that it reaches a saturated state, so that the excess gas is discharged and bubbles are formed, thereby achieving nucleation. The foaming machine is a device that produces products through foaming.

[0003] The feeding device of the foaming machine includes a mixing barrel and a low-pressure feeding gun. The raw materials of the foaming material enter the mixing barrel for stirring and mixing, and then are sprayed to the mold through the low-pressure feeding gun. Due to the low working pressure of the spray gun, there is often paint residue inside the gun mouth after use. If it is not cleaned in time, the residual paint is easy to solidify in the feeding device, resulting in crystallization in the sprayed paint when used next time, which seriously affects the quality of the subsequent sprayed materials. Utility Model Content

[0004] In order to improve the above problems, the present application provides a low-pressure feeding gun cleaning structure for a foaming machine.

[0005] The present application provides a foaming machine low-pressure feeding gun cleaning structure adopts the following technical solution:

[0006] A low-pressure feeding gun cleaning structure for a foaming machine comprises a mixing barrel and a spray gun, wherein the lower end of the mixing barrel is connected to the spray gun, a stirring body is coaxially rotated in the mixing barrel, and a cleaning pipe is also included, wherein the cleaning pipe is connected to the inner cavity of the mixing barrel and is used to spray cleaning liquid into the mixing barrel.

[0007] By adopting the above technical solution, after a round of feeding is completed, cleaning liquid is sprayed into the mixing barrel through the cleaning pipe. The cleaning liquid can flush and clean the inner wall of the mixing barrel and the inner cavity of the spray gun, flushing off the residual raw materials or clots attached thereon, thereby improving the cleanliness of the inner wall of the mixing barrel and the inner wall of the spray gun.

[0008] Preferably, it also includes an air blowing pipe, which is used to spray a pressurized air flow into the mixing barrel.

[0009] By adopting the above technical solution, after the cleaning tube is finished, the air blowing tube sprays a pressurized airflow into the mixing barrel to air-dry the inner wall of the mixing barrel and the inner wall of the spray gun.

[0010] Preferably, the stirring body is movably connected with a wall scraper near the inner wall of the mixing barrel, and when the cleaning pipe sprays cleaning liquid into the mixing barrel, the wall scraper contacts the inner wall of the mixing barrel.

[0011] By adopting the above technical solution, during the cleaning process, the stirring body rotates, driving the friction between the scraper and the inner wall of the mixing barrel, which is conducive to quickly removing the attachments on the inner wall of the mixing barrel and improving the cleaning intensity and effect of the inner wall of the mixing barrel.

[0012] Preferably, the scraper is slidably connected to the stirring body, the sliding direction is the radial direction of the stirring body, the scraper is fixedly connected with silicone rubber on one side facing the inner wall of the mixing barrel, and the stirring body is provided with a control component for controlling the movement of the scraper.

[0013] Preferably, the control component includes a return spring and a thrust rod, the thrust rod is located in the stirring body and slides, the sliding direction of the thrust rod is parallel to the axis of the stirring body, a force rod is fixedly connected to the wall scraper, the length direction of the force rod is the radial direction of the stirring body, one end of the return spring is connected to the force rod, and the other end is connected to the stirring body, a thrust wedge surface is provided on the thrust rod, and a force wedge surface is provided on the force rod, the force wedge surface and the thrust wedge surface abut against each other, and the elastic force applied by the return spring to the force rod is in opposite directions to the abutting force applied by the thrust wedge surface to the thrust rod.

[0014] By adopting the above technical solution, the thrust rod moves and transmits thrust to the force-bearing rod through the wedge surface cooperation, so that the force-bearing rod and the wall scraper are close to the inner wall of the mixing cylinder, that is, the wall scraper is in contact with the inner wall of the mixing cylinder.

[0015] Preferably, a power channel is coaxially opened on the stirring body, the thrust rod is located in the power channel, a power ring is fixedly connected to the inner wall of the mixing barrel, the power ring is coaxially sleeved outside the stirring body, a power ring groove is opened on the stirring body, the power ring groove is located in the power ring, the power ring groove is connected to the power channel, the cleaning pipe and the blowing pipe are both connected to the power ring and connected to the power ring groove, a leakage hole is opened on the power ring, and the leakage hole penetrates the wall thickness of the power ring.

[0016] By adopting the above technical solution, when the cleaning fluid is introduced, hydraulic pressure is generated in the power ring groove and the power channel, and this pressure can be used as the power to push the thrust rod to move.

[0017] Preferably, the leakage holes are provided in plurality and the plurality of leakage holes are arranged in a circular array around the axis of the power collar.

[0018] By adopting the above technical solution, the cleaning liquid and the pressurized air flow enter the mixing barrel through the leakage holes around the power collar, and the fluid distribution is more uniform.

[0019] Preferably, a check ball is provided on the power collar and in the leakage hole, and a check spring is connected between the check ball and the hole wall of the leakage hole.

[0020] By adopting the above technical solution, the flow direction of the fluid relative to the inside and outside of the power ring is determined by the check ball and the check spring, and the raw material is not easy to enter the power ring groove and the power channel.

[0021] The present application includes at least one of the following beneficial technical effects:

[0022] 1. Through the setting of the cleaning pipe, after a round of feeding, the cleaning liquid is sprayed into the mixing barrel through the cleaning pipe. The cleaning liquid can flush and clean the inner wall of the mixing barrel and the inner cavity of the spray gun, flushing away the residual raw materials or clots attached thereon, thereby improving the cleanliness of the inner wall of the mixing barrel and the inner wall of the spray gun;

[0023] 2. Through the setting of the scraper, during the cleaning process, the stirring body rotates, driving the friction between the scraper and the inner wall of the mixing barrel, thereby improving the cleaning intensity of the inner wall of the mixing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall cross-sectional schematic diagram used to reflect the cleaning structure of the low-pressure feeding gun of the foaming machine in the embodiment of the present application.

[0025] Figure 2 It is a cross-sectional schematic diagram used to illustrate the internal structure of the power collar in the embodiment of the present application.

[0026] Explanation of the reference numerals: 1. mixing cylinder; 11. spray gun; 12. power collar; 121. drain hole; 122. check ball; 123. check spring; 2. stirring body; 21. power channel; 22. power ring groove; 3. scraper; 31. force rod; 311. force wedge surface; 32. control assembly; 321. return spring; 322. thrust rod; 3221. thrust wedge surface; 4. cleaning pipe; 5. air blowing pipe. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-2 This application is described in further detail.

[0028] The present application embodiment discloses a foaming machine low-pressure feeding gun cleaning structure, such as Figure 1 and 2As shown, it includes a mixing barrel 1, a spray gun 11 and a stirring body 2. The mixing barrel 1 is connected to multiple raw material supply devices (not shown in the figure). Multiple raw materials enter the mixing barrel 1 for mixing, and the stirring body 2 stirs the raw materials in the mixing barrel 1. The spray gun 11 is connected to the bottom of the mixing barrel 1, and the mixed liquid will flow into the mold through the spray gun 11. It also includes a cleaning pipe 4 and a blowing pipe 5. The cleaning pipe 4 is used to spray cleaning liquid into the mixing barrel 1, and the blowing pipe 5 is used to spray pressure air into the mixing barrel 1. The two are used to clean the inner wall of the mixing barrel 1 and the spray gun 11 after the feeding is completed.

[0029] like Figure 1 and 2 As shown, the stirring body 2 includes a stirring shaft and a stirring paddle, the stirring paddle is fixedly connected to the side wall of the stirring shaft, the stirring shaft and the mixing barrel 1 are coaxially connected for rotation, and a motor for driving the stirring shaft to rotate is installed outside the mixing barrel 1. A power collar 12 is coaxially fixedly connected to the inner top wall of the mixing barrel 1, and the power collar 12 is coaxially sleeved outside the stirring shaft. A power ring groove 22 is coaxially provided on the stirring shaft of the stirring body 2, and the power ring groove 22 is located inside the power collar 12; one end of the cleaning pipe 4 and the blowing pipe 5 extends into the mixing barrel 1 and is connected to the power collar 12 and communicates with the power ring groove 22, and a plurality of leakage holes 121 are provided on the power collar 12, and the leakage holes 121 penetrate the wall thickness of the power collar 12, and the plurality of leakage holes 121 are arranged in a circular array around the axis of the power collar 12, and the fluid entering the mixing barrel 1 through the cleaning pipe 4 and the blowing pipe 5 is sprayed into the inner cavity of the mixing barrel 1 through each leakage hole 121. A check ball 122 is provided on the power collar 12 and in the leakage hole 121, and a check spring 123 is connected between the check ball 122 and the hole wall of the leakage hole 121. In a natural state, the check ball 122 abuts against the hole wall of the leakage hole 121, and the leakage hole 121 is blocked; when the pressure in the power ring groove 22 is greater than the outside of the power collar 12, the check ball 122 is forced to move, and the leakage hole 121 is opened.

[0030] like Figure 1 and 2As shown, the agitator 2 is movably connected with a scraper 3 near the inner wall of the mixing barrel 1. During the mixing and stirring of the raw materials, the scraper 3 and the inner wall of the mixing barrel 1 are not in contact. When the cleaning tube 4 sprays cleaning liquid into the mixing barrel 1, the scraper 3 and the inner wall of the mixing barrel 1 are in contact. The scraper 3 and the agitator 2 are slidably connected, and the sliding direction is the radial direction of the agitator 2. The scraper 3 is fixedly connected with silicone rubber on the side facing the inner wall of the mixing barrel 1, and the agitator 2 is provided with a control component 32 for controlling the movement of the scraper 3. The control component 32 includes a return spring 321 and a thrust rod 322. A power channel 21 is coaxially opened in the stirring shaft. The thrust rod 322 is located in the power channel 21. The length direction and sliding direction of the thrust rod 322 are parallel to the axis of the stirring body 2. A force-bearing rod 31 is fixedly connected to the wall scraper 3. The length direction of the force-bearing rod 31 is the radial direction of the stirring body 2. One end of the return spring 321 is connected to the force-bearing rod 31, and the other end is connected to the stirring body 2. In a natural state, the return spring 321 applies a pulling force to the force-bearing rod 31 to keep the wall scraper 3 away from the inner wall of the mixing barrel 1. A thrust wedge surface 3221 is provided on the side wall of the thrust rod 322, and a force wedge surface 311 is provided at one end of the force rod 31 away from the wall scraper 3, and the force wedge surface 311 abuts against the thrust wedge surface 3221. When the thrust rod 322 moves downward, the thrust wedge surface 3221 applies a thrust to the force wedge surface 311, and this thrust can move the force rod 31 away from the axis of the stirring body 2, so that the wall scraper 3 abuts against the inner wall of the mixing barrel 1. The top of the power channel 21 is connected to the power annular groove 22, that is, during the process of injecting cleaning liquid into the cleaning pipe 4, the pressure generated by the hydraulic pressure in the power annular groove 22 and the power channel 21 is the force driving the thrust rod 322 to move downward.

[0031] The implementation principle of a low-pressure feeding gun cleaning structure of a foaming machine in the embodiment of the present application is:

[0032] After the loading is completed, the mixing drum 1 and the spray gun 11 are cleaned, and the cleaning liquid is introduced into the cleaning pipe 4. At the same time, the stirring body 2 is rotated. The cleaning liquid rinses the inner wall of the mixing drum 1, the inner wall of the spray gun 11 and the stirring body 2. The scraper 3 frictionally cleans the inner wall of the mixing drum 1, and then a pressurized air flow is input into the mixing drum 1 through the blowing pipe 5 to air-dry the inner wall of the mixing drum 1, the inner wall of the spray gun 11 and the stirring body 2.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foaming machine low-pressure feeding gun cleaning structure, comprising a mixing barrel (1) and a spray gun (11), wherein the lower end of the mixing barrel (1) is connected to the spray gun (11), and a stirring body (2) is coaxially rotatably arranged in the mixing barrel (1), characterized in that: It also comprises a cleaning tube (4), the cleaning tube (4) being in communication with the inner cavity of the mixing cylinder (1), and the cleaning tube (4) being used for spraying cleaning liquid into the mixing cylinder (1).

2. A foaming machine low-pressure feeding gun cleaning structure according to claim 1, characterized in that: It also comprises an air blowing pipe (5), and the air blowing pipe (5) is used to spray a pressurized air flow into the mixing cylinder (1).

3. A foaming machine low-pressure feeding gun cleaning structure according to claim 2, characterized in that: The stirring body (2) is movably connected with a scraper (3) near the inner wall of the mixing cylinder (1); when the cleaning pipe (4) sprays cleaning liquid into the mixing cylinder (1), the scraper (3) contacts the inner wall of the mixing cylinder (1).

4. A foaming machine low-pressure feeding gun cleaning structure according to claim 3, characterized in that: The scraper (3) and the stirring body (2) are connected in a sliding manner, the sliding direction being the radial direction of the stirring body (2), the scraper (3) is fixedly connected with silicone rubber on one side facing the inner wall of the mixing barrel (1), and the stirring body (2) is provided with a control component (32) for controlling the movement of the scraper (3).

5. A foaming machine low-pressure feeding gun cleaning structure according to claim 4, characterized in that: The control assembly (32) comprises a return spring (321) and a thrust rod (322), wherein the thrust rod (322) is located in the stirring body (2) and slides, and the sliding direction of the thrust rod (322) is parallel to the axis of the stirring body (2). The wall scraper (3) is fixedly connected to a force-bearing rod (31), and the length direction of the force-bearing rod (31) is the radial direction of the stirring body (2). One end of the return spring (321) and the force-bearing rod (31) are connected to each other. The thrust rod (322) is connected to the force-bearing rod (31) at one end, and the other end is connected to the stirring body (2); a thrust wedge surface (3221) is provided on the thrust rod (322), and a force-bearing wedge surface (311) is provided on the force-bearing rod (31); the force-bearing wedge surface (311) and the thrust wedge surface (3221) are in abutment with each other, and the elastic force applied by the return spring (321) to the force-bearing rod (31) and the abutment force applied by the thrust wedge surface (3221) to the thrust rod (322) are in opposite directions.

6. A foaming machine low-pressure feeding gun cleaning structure according to claim 5, characterized in that: The stirring body (2) is coaxially provided with a power channel (21), the thrust rod (322) is located in the power channel (21), the inner wall of the mixing barrel (1) is fixedly connected with a power sleeve (12), the power sleeve (12) is coaxially sleeved outside the stirring body (2), the stirring body (2) is provided with a power ring groove (22), the power ring groove (22) is located in the power ring (12), the power ring groove (22) and the power channel (21) are communicated, the cleaning pipe (4) and the blowing pipe (5) are both connected to the power ring (12) and communicated with the power ring groove (22), the power ring (12) is provided with a leakage hole (121), and the leakage hole (121) passes through the wall thickness of the power ring (12).

7. A foaming machine low-pressure feeding gun cleaning structure according to claim 6, characterized in that: A plurality of leakage holes (121) are provided, and the plurality of leakage holes (121) are arranged in a ring array around the axis of the power collar (12).

8. A foaming machine low-pressure feeding gun cleaning structure according to claim 6 or 7, characterized in that: A check ball (122) is provided on the power collar (12) and in the leakage hole (121), and a check spring (123) is connected between the check ball (122) and the hole wall of the leakage hole (121).

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