Atomized gas control quantitative spray head

Abstract

The invention relates to the field of spraying, in particular to an atomized gas control quantitative sprayer which comprises a sprayer body, a shrinkage cavity is formed in the sprayer body, and the shrinkage cavity communicates with a transition core and an atomizing nozzle. A shrinking piston is slidably connected in the shrinking cavity, a quantifying cavity is arranged below the shrinking cavity, a release agent inlet is formed in the bottom of the quantifying cavity, a release agent suction channel is formed in the shrinking piston, the top end of the release agent suction channel is communicated with a release agent spraying outlet, and a release agent channel sealing ring is arranged at the top of the shrinking cavity; a quantitative piston is slidably connected into the quantitative cavity, the bottom end of the shrinking cavity is communicated with a control gas channel, an atomized gas inlet channel and an atomized gas outlet channel are arranged in the spray head body, the atomized gas outlet channel is communicated between the shrinking cavity and the atomizing nozzle, and atomized gas can enter the shrinking cavity firstly and then enter the quantitative cavity after entering through the atomized gas inlet channel. Control gas is adopted to control the shrinkage piston to reset, the control precision is high, and the device is small in size and can be applied to a narrow working space.

Description

Technical Field

[0001] The invention relates to the field of spraying, and in particular to an atomizing gas controlled quantitative spray head. Background Art

[0002] In the manufacturing process of mold making and injection molding, spraying the mold surface with a release agent can form a lubricating film, thereby preventing the material from adhering to the mold surface and causing demolding difficulties. At the same time, it prevents the parts from being scratched or damaged during the demolding process, ensuring that the parts are smoothly demolded from the mold and ensuring the surface quality of the parts.

[0003] Due to the different processing temperatures of the products, the amount of release agent required is different. However, the traditional nozzles are usually continuous spraying, which cannot meet the needs of differential spraying. Therefore, a quantitative pulse nozzle (publication number: CN117696284A; application date: 2024-01-12) is disclosed in the prior art, including a valve block, an injection structure and a pulse structure; the valve block is provided with a control air hole for passing control air, a release agent hole for injecting release agent, an atomizing air hole for passing atomizing air, a plunger hole and a mounting hole for mounting components; the end of the control air hole is divided into two paths, one of which is connected to the plunger hole and the other is connected to the upper end of the mounting hole; the release agent hole is connected to the bottom of the mounting hole; the valve block is also equipped with an internal pipe connected to the mounting hole. The nozzle is set by the pulse shaft, and it can continuously switch the relevant pipes through the control of the control gas, so that the release agent therein can be sprayed out in a pulsed manner, realizing the quantitative spraying of the release agent. However, the nozzle still has the following problems:

[0004] 1. The spring-driven pulse shaft reset method may cause fatigue, aging or damage over time, resulting in a decrease in elastic performance or even complete failure. Once the spring fails, it will not be able to effectively drive the pulse shaft to reset, resulting in the pulse shaft being unable to smoothly reset to the preset point, which in turn causes the plunger hole to be loosely sealed, causing the release agent to leak. In severe cases, the release agent may not have sufficient pressure to push the plunger to the predetermined position, which in turn causes the failure to fill the predetermined amount of release agent, making it impossible to spray the release agent to the predetermined amount, affecting the demoulding effect of the part.

[0005] 2. In the current design, the pulse axis is set on one side of the plunger, resulting in a larger nozzle volume. The larger nozzle volume limits its use when spraying in some narrow areas and cannot flexibly cope with various working conditions. Summary of the invention

[0006] The present invention is intended to provide an atomizing gas controlled quantitative spray head to solve the problems in the prior art of release agent leakage due to spring failure and even inability to accurately spray quantitatively.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme:

[0008] The atomizing gas controlled quantitative spray nozzle comprises a spray nozzle body, a shrinkage cavity is arranged in the spray nozzle body, a transition core is connected above the shrinkage cavity, and an atomizing nozzle is connected above the transition core; a shrinkage piston with a cross-shaped cross section is slidably connected in the shrinkage cavity, a quantitative cavity is arranged below the shrinkage cavity, a release agent inlet is connected at the bottom of the quantitative cavity, the bottom of the shrinkage piston is located in the quantitative cavity, the bottom end of the shrinkage piston can be inserted into the release agent inlet to block the release agent inlet, a release agent suction channel connected to the quantitative cavity is opened in the shrinkage piston, and the top of the release agent suction channel is connected to a nozzle along the diameter A release agent spray outlet is opened, and a release agent spray channel is formed between the top circumference of the shrinking piston and the shrinking cavity, and a release agent channel sealing ring is arranged on the top of the shrinking cavity; an annular quantitative piston is slidably connected in the quantitative cavity, and the quantitative piston is sealed and slidably connected with the shrinking piston; a control air channel is connected to the bottom end of the shrinking cavity, and an atomizing gas inlet channel and an atomizing gas outlet channel are arranged in the nozzle body, and the atomizing gas outlet channel is connected between the shrinking cavity and the atomizing nozzle, and the atomized gas can enter the shrinking cavity first and then enter the quantitative cavity after entering through the atomizing gas inlet channel.

[0009] Preferably, as an improvement, the atomized gas inlet channel includes a main channel, the main channel is connected with a shrinkage chamber channel, two arc grooves with central angles of 25°-35° are symmetrically opened on both sides of the top of the shrinkage chamber, the shrinkage chamber channel is connected above the arc groove on one side, and the atomized gas outlet channel is connected above the arc groove on the other side; the main channel is also connected with a quantitative chamber channel, the quantitative chamber channel is located below the top of the quantitative chamber, an upward quantitative chamber branch is connected between the quantitative chamber channel and the quantitative chamber, the diameter of the quantitative chamber channel is smaller than the diameter of the shrinkage chamber channel, and the diameter of the quantitative chamber branch is smaller than the diameter of the shrinkage chamber branch.

[0010] Preferably, as an improvement, the control air channel is arranged on one side of the metering chamber, the atomized gas outlet channel is arranged above the control air channel, the atomized gas outlet channel is arranged on the other side of the metering chamber, and the inlet of the control air channel, the inlet of the atomized gas inlet channel and the inlet of the release agent are all arranged at the bottom of the nozzle body.

[0011] Preferably, as an improvement, the shrinkage chamber and the quantitative chamber are connected, and the shrinkage chamber and the quantitative chamber are sealed and separated by a separation ring.

[0012] Preferably, as an improvement, the shrinkage chamber channel and the quantitative chamber channel are both arranged transversely and the outer ends thereof penetrate the side wall of the nozzle body, and the penetration is blocked by a blocking ball.

[0013] Preferably, as an improvement, the top of the release agent suction channel passes through the top of the shrink piston, and the top of the release agent suction channel is blocked with a blocking ball.

[0014] Preferably, as an improvement, the central angle of the arc groove is 30°.

[0015] The principles and beneficial effects of this scheme are:

[0016] 1. The control gas enters the shrinkage chamber from the control gas channel, drives the shrinkage piston to move up to the top of the shrinkage chamber, disconnects the connection between the atomizing gas inlet channel and the atomizing gas outlet channel, and at the same time, the bottom end of the shrinkage piston is pulled out from the release agent inlet, and the release agent can be loaded into the quantitative chamber through the release agent inlet. During the release agent filling process, the quantitative piston moves up until it moves up to the top of the quantitative chamber to stop injecting the release agent, thereby completing the quantitative filling of the release agent. During spraying, the atomized gas enters the shrinkage chamber channel and the quantitative chamber channel through the atomizing gas inlet channel. Since the shrinkage chamber branch channel is downward and has a larger diameter than the quantitative chamber branch channel, the atomized gas preferentially enters the shrinkage chamber from the shrinkage chamber branch channel to push the shrinkage piston down to block the release agent inlet and open the release agent spray channel at the same time. The atomized gas then enters the atomizing nozzle through the shrinkage chamber and the atomizing gas outlet channel. The atomized gas then enters the quantitative cavity through the quantitative cavity branch channel to press the piston down, presses the release agent into the release agent suction channel, and sprays it out from the release agent spray port, and finally enters the atomizing nozzle through the transition core and is atomized under the action of the atomizing gas and then sprayed out, thereby completing the quantitative spraying of the release agent.

[0017] After spraying is completed, the control air is introduced to compress the water piston again to complete the reset of the shrinking piston. This solution uses the control air to control the resetting of the shrinking piston, which has higher control accuracy and accurate reset. There is no problem of inaccurate reset due to spring failure, which leads to leakage of release agent, or even failure to quantitatively load release agent.

[0018] 2. This solution improves the integration of the nozzle and reduces the size of the nozzle through the synergistic effect of the following aspects, so that it can be used in a small working space. Specifically:

[0019] (1) The shrinking piston and the metering piston are integrated together up and down, and the mold release agent suction channel is integrated into the shrinking piston. There is no need to occupy other positions of the nozzle body to open the mold release agent suction channel. The integration is high and the nozzle volume can be effectively reduced.

[0020] (2) The atomizing gas inlet channel and the control gas channel are respectively arranged on both sides of the metering chamber, and the atomizing gas outlet channel is reasonably arranged above the control gas channel, without occupying additional space in the width direction of the nozzle body, further improving the integration and reducing the nozzle volume.

[0021] (3) The inlet of the atomizing gas inlet channel, the inlet of the control gas channel and the release agent inlet are centrally arranged at the bottom of the nozzle body and can be centrally connected. When the nozzle enters a narrow space, it can be ensured that the pipe joints and pipelines are all at the tail of the nozzle, will not occupy the side space, and will not interfere with the entry of the nozzle.

[0022] (4) The release agent inlet is opened at the bottom of the quantitative chamber. On the one hand, the pipe joint can be integrated at the bottom of the nozzle body to achieve the above-mentioned effect. On the other hand, the bottom end of the shrinking piston can be directly used to seal the release agent inlet. If the release agent inlet is set at the top in the existing technology, it is necessary to additionally configure a sealing structure for the release agent inlet and the sealing structure needs to be connected to the shrinking piston. Not only is the structure complicated, but an additional sealing structure is also introduced, resulting in an increase in the volume of the nozzle. In addition, it is also necessary to add a release agent injection channel on the side of the quantitative chamber, which will further increase the volume of the nozzle.

[0023] 3. This solution ensures both the atomization effect and the efficient response of the equipment: by setting an arc groove with a central angle of 25°-35° on the top of the shrinkage chamber to connect with the shrinkage chamber channel, and the quantitative chamber channel is only connected to the quantitative chamber through a narrow upward quantitative chamber branch, so that the atomized gas can enter the shrinkage chamber more easily, thereby achieving the purpose of the atomized gas entering the shrinkage chamber first. This solution achieves the purpose of the atomized gas entering the shrinkage chamber first through the design of the arc groove and the narrow branch. Compared with the prior art method of opening two channels separately and relying on the length difference of the channels to achieve the sequential movement, this solution has fewer channels and shorter channels, which can effectively reduce the volume of the nozzle.

[0024] The use of an arc groove with a central angle of 25°-35° can ensure that there is enough flow inside, so that the internal flow is greater than the flow at the outlet of the atomizing nozzle, thereby ensuring a good atomization effect; on this basis, such a design can also provide sufficient pressure to the retracting piston, so that the retracting piston can respond quickly, ensuring the response speed. If the central angle of the arc groove is too small, the internal flow is insufficient and a good atomization effect cannot be achieved; if the central angle of the arc groove is too large, the atomizing gas pressure relief is too large, and sufficient pressure cannot be provided to the retracting piston, resulting in a slow opening speed of the retracting piston and a slow response of the equipment. Therefore, this scheme combines the atomization effect and the equipment response speed, and after a lot of research, finally adopts an arc groove with a central angle of 25°-35°. In addition, compared with the direct drilling method, the use of an arc groove in this scheme can reduce the longitudinal volume of the nozzle body and is easy to process.

[0025] 4. The shrinkage cavity and the quantitative cavity are connected, and the middle is sealed and separated by a separation ring, which is easy to process. The entire cavity can be directly processed and then the separation ring can be installed. In addition, the shrinkage cavity channel and the quantitative cavity channel directly penetrate the side wall of the nozzle body and then are blocked at the outer end. Compared with directly turning inside to open, this structure of this scheme is less difficult to process and more convenient to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0027] Figure 2It is a front view of an embodiment of the present invention.

[0028] Figure 3 It is a longitudinal cross-sectional view of an embodiment of the present invention.

[0029] Figure 4 It is a partial transverse cross-sectional view of an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] The figure marks in the drawings of the specification include: nozzle body 1, shrinkage chamber 2, shrinkage piston 21, release agent suction channel 22, release agent spray port 23, transition core 3, atomizing nozzle 4, separation ring 5, metering chamber 6, release agent inlet 61, metering piston 62, metering chamber seat 63, boss 64, metering chamber seat sealing ring 65, release agent spray channel 7, release agent channel sealing ring 8, control air channel 9, main channel 10, shrinkage chamber channel 101, metering chamber channel 102, arc groove 103, metering chamber branch channel 104, atomizing gas outlet channel 11.

[0032] Example:

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the atomizing gas controlled quantitative spray head comprises a spray head body 1, a shrinkage cavity 2 is provided in the spray head body 1, a transition core 3 is connected above the shrinkage cavity 2, and an atomizing nozzle 4 is connected above the transition core 3. A shrinkage piston 21 with a cross-shaped cross section is slidably connected in the shrinkage cavity 2, a quantitative cavity seat 63 is installed below the shrinkage cavity 2, and the outer circle of the bottom of the quantitative cavity seat 63 is sealed and connected to the spray head body 1 through a quantitative cavity seat sealing ring 65, a quantitative cavity 6 is provided in the quantitative cavity seat 63, and the quantitative cavity 6 and the shrinkage cavity 2 are sealed and separated by a separation ring 5, a release agent inlet 61 is connected to the bottom of the quantitative cavity 6, the bottom of the shrinkage piston 21 is located in the quantitative cavity 6, and the bottom end of the shrinkage piston 21 can be inserted into the release agent inlet 61 to block the release agent inlet 61. An annular quantitative piston 62 is slidably connected in the quantitative cavity 6, and the quantitative piston 62 is slidably connected to the shrinkage piston 21 through a sealing ring, and an annular boss 64 is integrally formed on the upper and lower sides of the quantitative piston 62.

[0034] A release agent suction passage 22 connected to the quantitative chamber 6 is provided in the shrinking piston 21. The top of the release agent suction passage 22 passes through the top of the shrinking piston 21. The top of the release agent suction passage 22 is blocked by a blocking ball (not shown in the figure). The blocking ball is a stainless steel ball. The top of the release agent suction passage 22 is connected to a release agent spray port 23 arranged radially. A release agent spray channel 7 is formed between the top of the shrinking piston 21 and the shrinking chamber 2 in the circumferential direction. A release agent channel sealing ring 8 is installed on the top of the shrinking chamber 2. When the top of the shrinking piston 21 abuts against the release agent channel sealing ring 8, the release agent spray channel 7 is sealed.

[0035] The bottom of the shrinkage chamber 2 is connected with a control air channel 9, which is arranged on the right side of the quantitative chamber 6. An atomizing gas outlet channel 11 is opened above the control air channel 9, and an atomizing gas inlet channel is opened on the left side of the quantitative chamber 6. The atomizing gas inlet channel includes a main channel 10, which is connected with a shrinkage chamber channel 101. The shrinkage chamber channel 101 is located above the shrinkage chamber 2, combined with Figure 4 As shown, two arc grooves 103 with a central angle of 25°-35° are symmetrically opened on both sides of the top of the shrinkage chamber 2. In this embodiment, the arc groove 103 with a central angle of 30° is preferably opened. The shrinkage chamber channel 101 is connected above the arc groove 103 on the left side, and the atomized gas outlet channel 11 is connected above the arc groove 103 on the right side. The main channel 10 is also connected to the quantitative chamber channel 102, and the diameter of the quantitative chamber channel 102 is smaller than the diameter of the shrinkage chamber channel 101. The quantitative chamber channel 102 is located below the top of the quantitative chamber 6 and is laterally aligned with the position of the quantitative piston 62 after the release agent is filled. The quantitative chamber channel 102 is connected to the quantitative chamber 6 with an upward quantitative chamber branch 104, which is formed by the gap between the side wall of the quantitative chamber seat 63 and the nozzle body 1 and the radial groove (not shown in the figure) radially opened at the top of the quantitative chamber seat 63, and the diameter of the radial groove is 1.8mm. The shrinkage cavity channel 101 and the quantitative cavity channel 102 are both arranged horizontally and the outer ends penetrate the side wall of the nozzle body 1, and the penetration is blocked by a blocking ball. The inlet of the control air channel 9, the inlet of the main channel 10 of the atomizing air inlet channel and the inlet of the release agent are all arranged at the bottom of the nozzle body 1.

[0036] The method of using the atomizing gas controlled quantitative nozzle is as follows:

[0037] 1. Quantitative filling of release agent: The control gas enters the shrinkage chamber 2 from the control gas channel 9 to push the shrinkage piston 21 upward, so that the top of the shrinkage piston 21 is pressed against the release agent channel sealing ring 8. At this time, the release agent spray channel 7 is closed, and the top of the shrinkage chamber 2 is also blocked by the shrinkage piston 21. The atomized gas inlet channel 10 and the atomized gas outlet channel 11 cannot be connected; at the same time, the bottom end of the shrinkage piston 21 is pulled out from the release agent inlet 61, and the release agent inlet 61 is opened. The release agent is injected into the quantitative chamber 6 from the release agent inlet 61, and the quantitative piston 62 moves upward under the push of the release agent. The release agent fills the quantitative chamber 6. At this time, the quantitative piston 62 is located at the top of the quantitative chamber 6, thereby completing the quantitative filling of the release agent. After the filling is completed, the release agent pipeline connected to the release agent inlet 61 is closed. Although some release agent will enter the release agent suction channel 22 during the filling process, the release agent will not leak because the top of the release agent suction channel 22 is blocked and the top of the shrink piston 21 abuts against the release agent channel sealing ring 8.

[0038] 2. Quantitative atomization spraying of release agent: The atomized gas enters from the main channel 10 of the atomized gas inlet channel, and enters the shrinkage cavity channel 101 and the quantitative cavity channel 102 respectively. Since the quantitative cavity channel 102 is connected to the gap of the outer wall of the quantitative cavity seat 63, and only a narrow radial groove is opened on the top of the quantitative cavity seat 63, the atomized gas will diffuse in the gap between the quantitative cavity seat 63 and the nozzle body 1 when reaching the quantitative cavity channel 102, and the arc groove 103 with a larger space is opened on the top of the shrinkage cavity 2, so the atomized gas can enter the shrinkage cavity 2 more easily. Therefore, the atomized gas preferentially enters the lower compression water piston 21 in the shrinkage chamber 2 through the arc groove 103, so that the top of the shrinkage piston 21 is separated from the release agent channel sealing ring 8, and the release agent channel is opened; at the same time, the upper part of the shrinkage chamber 2 is opened, and the atomized gas inlet channel 10 and the atomized gas outlet channel 11 can be connected through the shrinkage chamber 2, and the atomized gas enters the atomizing nozzle 4 through the atomized gas outlet channel 11; at the same time, the bottom end of the shrinkage piston 21 is inserted into the release agent inlet 61 to block the release agent inlet 61.

[0039] Then, the atomized gas enters the metering chamber 6 from the metering chamber branch 104 and presses down the metering piston 62, thereby pressing the release agent in the metering chamber 6 into the release agent suction channel 22. After the release agent is sprayed out from the release agent spray port 23, it enters the atomizing nozzle 4 through the transition core 3 and mixes with the atomizing gas. It is atomized and sprayed out under the action of the atomizing gas, thereby completing the quantitative spraying of the release agent.

[0040] After spraying is completed, the control gas is introduced again, and the control gas enters the shrinking chamber 2 again to push the shrinking piston 21 to move upward, thereby opening the release agent inlet 61 again, and the release agent can be filled again.

[0041] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Atomizing gas controlled quantitative nozzle, characterized by: It comprises a nozzle body, wherein a shrinkage cavity is arranged in the nozzle body, a transition core is connected above the shrinkage cavity, and an atomizing nozzle is connected above the transition core; A shrinking piston with a cross-shaped cross section is slidably connected in the shrinking cavity, a quantitative cavity is arranged below the shrinking cavity, a release agent inlet is connected to the bottom of the quantitative cavity, the bottom of the shrinking piston is located in the quantitative cavity, the bottom end of the shrinking piston can be inserted into the release agent inlet to block the release agent inlet, a release agent suction channel connected to the quantitative cavity is opened in the shrinking piston, the top of the release agent suction channel is connected to a release agent spraying port opened radially, a release agent spraying channel is formed between the top of the shrinking piston and the shrinking cavity in the circumferential direction, and a release agent channel sealing ring is arranged on the top of the shrinking cavity; an annular quantitative piston is slidably connected in the quantitative cavity, and the quantitative piston is sealingly and slidably connected to the shrinking piston; The bottom of the shrinkage chamber is connected with a control air channel, and the nozzle body is provided with an atomizing gas inlet channel and an atomizing gas outlet channel. The atomizing gas outlet channel is connected between the shrinkage chamber and the atomizing nozzle. After the atomizing gas enters through the atomizing gas inlet channel, it can first enter the shrinkage chamber and then enter the quantitative chamber.

2. The atomizing gas controlled quantitative spray nozzle according to claim 1, characterized in that: The atomized gas inlet channel includes a main channel, which is connected to a shrinkage cavity channel. Two arc grooves with central angles of 25°-35° are symmetrically opened on both sides of the top of the shrinkage cavity. The shrinkage cavity channel is connected above the arc groove on one side, and the atomized gas outlet channel is connected above the arc groove on the other side; the main channel is also connected to a quantitative cavity channel, which is located below the top of the quantitative cavity, and an upward quantitative cavity branch is connected between the quantitative cavity channel and the quantitative cavity, and the diameter of the quantitative cavity channel is smaller than the diameter of the shrinkage cavity channel.

3. The atomizing gas controlled quantitative spray nozzle according to claim 2, characterized in that: The control air channel is arranged on one side of the quantitative cavity, the atomized gas outlet channel is arranged above the control air channel, the atomized gas outlet channel is arranged on the other side of the quantitative cavity, and the inlet of the control air channel, the inlet of the atomized gas inlet channel and the inlet of the release agent are all arranged at the bottom of the nozzle body.

4. The atomizing gas controlled quantitative spray nozzle according to claim 3, characterized in that: The shrinkage chamber is communicated with the quantitative chamber, and the shrinkage chamber and the quantitative chamber are sealed and separated by a separation ring.

5. The atomizing gas controlled quantitative spray nozzle according to claim 4, characterized in that: The shrinkage cavity channel and the quantitative cavity channel are both arranged transversely and the outer ends thereof penetrate the side wall of the nozzle body, and a blocking ball is provided at the penetration point.

6. The atomizing gas controlled quantitative spray nozzle according to claim 5, characterized in that: The top of the mold release agent suction channel passes through the top of the shrink piston, and the top of the mold release agent suction channel is blocked with a blocking ball.

7. The atomizing gas controlled quantitative spray nozzle according to claim 2, characterized in that: The center angle of the arc groove is 30°.

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