Flow stepless regulation spray head

Abstract

The invention relates to the field of spraying, in particular to a flow stepless regulation sprayer which comprises a sprayer body, a piston cavity is formed in the sprayer body, a piston is slidably connected into the piston cavity, one end of the piston cavity is communicated with a release agent inlet, the other end of the piston cavity is communicated with a release agent channel, and a one-way valve is arranged at the communication position. One end of the release agent suction channel is communicated with the release agent inlet, the other end of the release agent suction channel is communicated with a release agent outlet, a release agent temporary storage cavity is formed between the piston and the piston cavity, a temporary storage cavity sealing ring is arranged at the communication position of the piston and the release agent channel, the release agent channel is communicated with an atomizing nozzle, and the piston cavity is communicated with a control gas channel; the piston cavity is further communicated with an atomized gas inlet channel and an atomized gas outlet channel, the atomized gas outlet channel is communicated with the atomizing nozzle, an adjusting channel is communicated between the atomized gas inlet channel and the release agent channel, and an adjusting valve is arranged in the adjusting channel. The flow of the release agent can be steplessly adjusted, the release agent channel cannot be blocked, and the atomization effect is good.

Description

Technical Field

[0001] The invention relates to the field of spraying, and in particular to a flow-stepless regulating nozzle. Background Art

[0002] In the process of injection molding, spraying mold release agent is a key process. The release agent can not only adjust the temperature in the mold and improve the demoulding performance of the die casting, but also improve the working conditions of the mold, prevent sticking, and reduce the thermal conductivity and temperature of the mold. In addition, the release agent also has a lubricating effect at high temperatures to prevent the casting from wearing the cavity surface.

[0003] At present, spraying of mold release agents usually uses dedicated spraying equipment, which uses a robot to grab and approach the mold to spray the mold release agent. However, there are some problems with existing spraying equipment: existing spraying equipment usually uses multiple nozzles, and each nozzle has the same flow rate. However, due to the difference in temperature in different areas of the mold, if the nozzle with the same flow rate is used, it is impossible to adjust the nozzle flow rate at a fixed point and in a fixed area. For example, for high-temperature areas, more mold release agent needs to be sprayed to ensure a good mold release effect; while for other areas with lower temperatures, spraying too much mold release agent will cause waste.

[0004] In order to solve the above problems, the prior art discloses an atomizing nozzle for spraying a mold release agent stock solution (publication number: CN205949116U; application date: 2016-06-22), in which the closing design between the piston cone hole and the cone surface of the atomizing head is in the form of a cone valve, the atomizing head is provided with a cone groove connected to the mold release agent outlet flow channel, the end of the piston is provided with a cone head matching the cone groove, the cone groove and the cone head fit together to make the atomizing head and the piston sealed, and the nozzle flow is adjusted by adjusting the opening of the cone valve. This adjustment method of the prior art has the following problems in actual application: due to the viscosity of the mold release agent, when the opening of the cone valve is too small, it is easy to cause the mold release agent channel to be blocked. Once blocked, it will cause uneven spraying of the mold release agent, affecting product quality, and requiring shutdown for maintenance, affecting production efficiency, and increasing maintenance costs. Summary of the invention

[0005] The present invention aims to provide a nozzle with stepless flow regulation to solve the problem that the release agent regulation method in the prior art easily leads to blockage of the release agent channel.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] The flow rate stepless regulation nozzle comprises a nozzle body, a piston cavity is opened in the nozzle body, a piston is slidably connected in the piston cavity, one end of the piston cavity is connected to a release agent inlet, the other end of the piston cavity is connected to a release agent channel and a one-way valve is arranged at the connection point, a release agent suction channel is opened in the piston, one end of the release agent suction channel is connected to the release agent inlet, the other end of the release agent suction channel is connected to a release agent outlet arranged along the radial direction of the piston, a release agent temporary storage cavity is formed between the piston and the piston cavity, the release agent temporary storage cavity is connected to the release agent outlet, the piston is connected to the release agent A temporary storage chamber sealing ring is provided at the connection point of the agent channel, the release agent channel is connected to an atomizing nozzle, the piston chamber is connected to a control air channel, the control air channel is used to introduce control air to drive the piston to slide toward the release agent channel, the piston chamber is also connected to an atomizing gas inlet channel and an atomizing gas outlet channel, the atomizing gas inlet channel is used to introduce atomizing gas to drive the piston to slide toward the release agent inlet, the atomizing gas outlet channel is connected to the atomizing nozzle, an adjusting channel is connected between the atomizing gas inlet channel and the release agent channel, and a regulating valve is arranged in the adjusting channel.

[0008] Preferably, as an improvement, the regulating valve is a ball valve, the ball of the ball valve is rotatably connected in the regulating channel, and the valve stem of the ball valve extends out of the nozzle body.

[0009] Preferably, as an improvement, an inclined connecting channel is connected between the regulating channel and the release agent channel.

[0010] Preferably, as an improvement, the inclination angle of the connecting channel is 70-80°.

[0011] Preferably, as an improvement, the atomizing gas inlet passage is communicated with the atomizing nozzle.

[0012] Preferably, as an improvement, the one-way valve comprises a valve ball and a spring, and when the spring is in a natural state, the valve ball closes the connection between the release agent channel and the piston chamber.

[0013] Preferably, as an improvement, the atomizing gas inlet channel includes a main channel, the main channel is connected to the piston cavity channel, two arc grooves with central angles of 25°-35° are symmetrically opened on both sides of the piston cavity, the piston cavity channel is connected above the arc groove on one side, and the atomizing gas outlet channel is connected above the arc groove on the other side.

[0014] Preferably, as an improvement, the control air channel is arranged on one side of the piston chamber, the atomizing gas outlet channel is arranged above the control air channel, the atomizing gas inlet channel is arranged on the other side of the piston chamber, and the inlet of the control air channel, the inlet of the atomizing gas inlet channel and the release agent inlet are all arranged at the bottom of the nozzle body.

[0015] Preferably, as an improvement, the central angle of the arc groove is 30°.

[0016] Preferably, as an improvement, a sealing seat is sealed at the bottom of the piston cavity, and the release agent inlet is opened on the sealing seat.

[0017] The principles and beneficial effects of this scheme are:

[0018] 1. The principle of injecting the release agent is as follows: the control gas is introduced, the control gas drives the piston to move to close to the sealing ring of the temporary storage chamber, the release agent is introduced from the release agent inlet, and the release agent is introduced into the release agent temporary storage chamber through the release agent suction channel for temporary storage.

[0019] The principle of atomizing and spraying the release agent is as follows: the atomizing gas enters the piston cavity from the atomizing gas inlet channel to drive the piston to move toward the release agent inlet, and a gap is formed between the piston and the sealing ring of the temporary storage cavity. The release agent can enter the release agent channel from the temporary storage cavity and push open the valve ball. The spring is compressed, and the release agent enters the atomizing nozzle through the release agent channel. At the same time, after the piston moves, the atomizing gas inlet channel and the atomizing gas outlet channel are connected through the piston cavity, and the atomizing gas also enters the atomizing nozzle. The release agent is atomized and sprayed out under the action of the atomizing gas.

[0020] The principle of release agent flow regulation is: turn the ball valve to adjust the opening of the air channel. The larger the opening, the more atomized gas will enter the release agent channel, the more space the release agent channel will occupy, and the smaller the release agent spray volume in the release agent channel; conversely, the larger the amount of release agent in the release agent channel, thereby completing the regulation of the release agent flow.

[0021] 2. Conventional means usually adjust the flow rate of the release agent by directly adjusting the size of the release agent channel. The inventor found through research that this method is easy to cause the release agent channel to be blocked when the size of the release agent channel is adjusted too small. Therefore, this application changes the tradition and adopts the method of introducing atomizing gas into the release agent channel to adjust the flow rate of the release agent. This method can not only adjust the flow rate of the release agent, but also due to the introduction of atomizing gas, it can also perform a certain flushing of the release agent channel to achieve daily maintenance of the release agent channel, thereby reducing the probability of blockage of the release agent channel. In addition, this method can also make the release agent atomized with the atomizing gas before entering the atomizing nozzle, and then mix with the atomizing gas introduced into the atomizing gas outlet channel after entering the atomizing nozzle. It can be atomized twice in succession, with better atomization effect, finer release agent particles after atomization, and higher spray quality.

[0022] 3. In this solution, a one-way valve composed of a spring and a valve ball is arranged at the connection point between the release agent channel and the piston chamber. The valve ball can only move toward the direction of the atomizing nozzle, and when moving toward the piston chamber, it will press against the inner wall of the release agent channel, thereby preventing the release agent in the release agent channel from flowing back.

[0023] 4. This solution adds an inclined connecting channel between the regulating channel and the release agent channel. Compared with the atomizing gas directly entering the release agent channel horizontally from the regulating channel, the atomizing gas is obliquely introduced into the release agent channel to effectively avoid the impact diversion of the atomizing gas caused by the direct horizontal introduction of the atomizing gas. On the one hand, it reduces or even avoids the downward diversion of the atomizing gas to press down the valve ball and affect the outflow of the release agent. On the other hand, it can also reduce or even avoid the consumption of the atomizing gas pressure to ensure a good atomization effect. Through experiments, it is found that the above comprehensive effect is best when the inclination angle of the connecting channel is 70-80°. When it is less than 70°, the impact loss of the atomizing gas is greater and the atomization effect is not good. When it is greater than 80°, the length of the connecting channel increases, which will increase the difficulty of processing and precision control of the connecting channel, and cause the first mixing of the atomizing gas and the release agent to be delayed, and the atomization effect is still not good.

[0024] 5. In this solution, the atomizing gas in the atomizing gas inlet channel is divided into two paths, one path enters the regulating channel, and the other path directly enters the atomizing gas nozzle. Combined with the atomizing gas entering the atomizing nozzle in the atomizing gas outlet channel, a form of atomizing gas entering from multiple directions at the same time is formed, which can make the release agent atomized more evenly and further improve the atomization effect.

[0025] 6. 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 piston, so that the 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 piston, resulting in a slow opening speed of the 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.

[0026] 7. The atomizing gas inlet channel and the control gas channel are respectively arranged on both sides of the piston 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, thereby improving the integration and reducing the nozzle volume.

[0027] 8. 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 at the tail of the nozzle, which will not occupy the side space and will not interfere with the entry of the nozzle.

[0028] 9. A sealing seat is sealed at the bottom of the piston cavity, and the release agent inlet is opened on the sealing seat. In this way, a cavity can be directly opened from the bottom of the nozzle body, and then a sealing plug is sealed to form the piston cavity, which is convenient for processing and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0030] Figure 2 It is a cross-sectional view of an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: nozzle body 1, piston cavity 2, arc groove 21, piston 3, release agent suction channel 31, release agent outlet 32, release agent temporary storage cavity 33, temporary storage cavity sealing ring 34, sealing seat 4, release agent inlet 41, release agent channel 5, one-way valve 6, valve ball 61, spring 62, transition core 7, atomizing nozzle 71, control air channel 8, atomizing air inlet channel 9, main channel 91, piston cavity channel 92, adjustment channel 10, ball valve 101, valve stem 102, connecting channel 103, atomizing air outlet channel 11.

[0033] Example:

[0034] like Figure 1 and Figure 2 As shown, the flow rate stepless regulation nozzle comprises a nozzle body 1, a piston chamber 2 is formed in the nozzle body 1, a piston 3 is slidably connected in the piston chamber 2, a sealing seat 4 is sealed at the bottom of the piston chamber 2, a release agent inlet 41 is formed on the sealing seat 4, and the bottom end of the piston 3 is sealed and slidably connected in the release agent inlet 41. The top end of the piston chamber 2 is connected to a release agent channel 5 and a one-way valve 6 is installed at the connection point. The one-way valve 6 comprises a valve ball 61 and a spring 62, the spring 62 is connected above the valve ball 61, and the valve ball 61 closes the connection point between the release agent channel 5 and the piston chamber 2 when the spring 62 is in a natural state. A release agent suction channel 31 is formed in the piston 3, the bottom end of the release agent suction channel 31 is connected to the release agent inlet 41, the top end of the release agent suction channel 31 is connected to a release agent outlet 32 ​​opened along the radial direction of the piston 3, a release agent temporary storage chamber 33 is formed between the top end of the piston 3 and the piston chamber 2, and a temporary storage chamber sealing ring 34 is installed at the connection point between the piston 3 and the release agent channel 5.

[0035] The top of the release agent channel 5 is connected to an atomizing nozzle 71 through a transition core 7, and the bottom of the left side of the piston chamber 2 is connected to a control air channel 8, which is used to introduce control air to drive the piston 3 to slide toward the release agent channel 5. An atomizing air inlet channel 9 is opened on the right side of the piston chamber 2, and the atomizing air inlet channel 9 is connected to the atomizing nozzle 71. The atomizing air inlet channel 9 is used to introduce atomizing air to drive the piston 3 to slide toward the release agent inlet 41. The atomizing air inlet channel 9 includes a main channel 91, and the main channel 91 is connected to a piston chamber channel 92. Two arc grooves 21 with a central angle of 25°-35° are symmetrically opened on both sides of the top of the piston chamber 2. In this embodiment, the central angle of the arc groove 21 is 30°. The piston chamber channel 92 is connected above the arc groove 21 on the right side, and an atomizing air outlet channel 11 is connected between the arc groove 21 on the left side of the piston chamber 2 and the atomizing nozzle 71, and the atomizing air outlet channel 11 is located above the control air channel 8. The inlet of the control gas channel 8 , the inlet of the atomizing gas inlet channel 9 and the release agent inlet 41 are all opened at the bottom of the nozzle body 1 .

[0036] An adjusting channel 10 is connected between the atomizing gas inlet channel 9 and the release agent channel 5. A regulating valve is rotatably connected in the adjusting channel 10. The regulating valve is a ball valve 101. The valve stem 102 of the ball valve 101 extends out of the nozzle body 1. An inclined connecting channel 103 is connected between the adjusting channel 10 and the release agent channel 5. The inclination angle of the connecting channel 103 is 70-80°, and 75° is preferred in this embodiment.

[0037] The method of using the flow stepless adjustment nozzle is:

[0038] This solution can be applied to the spraying of different spraying liquids. This embodiment takes the release agent as an example:

[0039] The principle of injecting the release agent: the control air is introduced from the control air channel 8, and the control air enters from the bottom of the piston chamber 2 to drive the piston 3 to move upward until the top of the piston 3 abuts against the temporary storage chamber sealing ring 34. At this time, the release agent temporary storage chamber 33 is sealed and the release agent can be introduced. The release agent is introduced from the release agent inlet 41, and the release agent enters the release agent temporary storage chamber 33 through the release agent suction channel 31 in the piston 3 for temporary storage.

[0040] The principle of atomization spraying of release agent: atomization gas is introduced from the atomization gas inlet channel 9, and the atomization gas enters from the arc groove 21 on the top right side of the piston chamber 2 and presses down the piston 3. After the piston 3 moves down, it is separated from the temporary storage seal ring, and the release agent temporary storage chamber 33 is opened. The release agent enters the release agent channel 5 and pushes up the valve ball 61. The spring 62 is compressed, and a gap is formed between the valve ball 61 and the release agent channel 5 for the release agent to be sprayed out. The release agent enters the atomization nozzle 71. At the same time, after the piston 3 is pressed down, the atomization gas inlet channel 9 and the atomization gas outlet channel 11 are connected through the piston chamber 2. Therefore, the atomization gas enters the atomization nozzle 71 through the atomization gas outlet channel 11 and mixes with the release agent in the atomization nozzle 71. The release agent is atomized and sprayed under the action of the atomization gas.

[0041] Principle of release agent flow rate regulation: Rotate the ball valve 101 to adjust the opening of the regulating channel 10, thereby adjusting the amount of atomized gas entering the release agent channel 5. The greater the amount of atomized gas entering, the larger the space occupied in the release agent channel 5, and the smaller the flow rate of the release agent in the release agent channel 5. Conversely, the flow rate of the release agent is larger, thereby completing the release agent flow rate regulation. When the ball valve 101 is fully opened, there is no release agent in the release agent channel 5, the nozzle does not spray the release agent, and only sprays the atomized gas, which can dry the mold.

[0042] 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. Flow rate stepless adjustment nozzle, characterized by: The nozzle body comprises a nozzle body, a piston cavity is formed in the nozzle body, a piston is slidably connected in the piston cavity, one end of the piston cavity is connected to a mold release agent inlet, the other end of the piston cavity is connected to a mold release agent channel and a one-way valve is arranged at the connection point, a mold release agent suction channel is formed in the piston, one end of the mold release agent suction channel is connected to the mold release agent inlet, the other end of the mold release agent suction channel is connected to a mold release agent outlet arranged along the radial direction of the piston, a mold release agent temporary storage cavity is formed between the piston and the piston cavity, the mold release agent temporary storage cavity is connected to the mold release agent outlet, and the connection between the piston and the mold release agent channel A temporary storage chamber sealing ring is arranged at the passage, the release agent channel is connected with an atomizing nozzle, the piston chamber is connected with a control air channel, the control air channel is used to introduce control air to drive the piston to slide toward the release agent channel, the piston chamber is also connected with an atomizing gas inlet channel and an atomizing gas outlet channel, the atomizing gas inlet channel is used to introduce atomizing gas to drive the piston to slide toward the release agent inlet, the atomizing gas outlet channel is connected with the atomizing nozzle, an adjusting channel is connected between the atomizing gas inlet channel and the release agent channel, and an adjusting valve is arranged in the adjusting channel.

2. The flow rate stepless adjustment nozzle according to claim 1 is characterized in that: The regulating valve is a ball valve, the ball of which is rotatably connected in the regulating channel, and the valve stem of the ball valve extends out of the nozzle body.

3. The flow rate stepless adjustment nozzle according to claim 2 is characterized in that: An inclined connecting channel is connected between the regulating channel and the release agent channel.

4. The flow rate stepless adjustment nozzle according to claim 3 is characterized in that: The inclination angle of the connecting channel is 70-80°.

5. The flow rate stepless adjustment nozzle according to claim 4 is characterized in that: The atomizing gas inlet passage is communicated with the atomizing nozzle.

6. The flow rate stepless adjustment nozzle according to claim 1, characterized in that: The one-way valve comprises a valve ball and a spring. When the spring is in a natural state, the valve ball closes the connection between the release agent channel and the piston cavity.

7. The flow rate stepless adjustment nozzle according to any one of claims 1 to 6, characterized in that: The atomizing gas inlet channel includes a main channel, which is connected to a piston cavity channel. Two arc grooves with central angles of 25°-35° are symmetrically opened on both sides of the piston cavity. The piston cavity channel is connected above the arc groove on one side, and the atomizing gas outlet channel is connected above the arc groove on the other side.

8. The flow rate stepless adjustment nozzle according to claim 7, characterized in that: The control air channel is arranged on one side of the piston cavity, the atomized gas outlet channel is arranged above the control air channel, the atomized gas inlet channel is arranged on the other side of the piston cavity, and the inlet of the control air channel, the inlet of the atomized gas inlet channel and the release agent inlet are all arranged at the bottom of the nozzle body.

9. The flow rate stepless adjustment nozzle according to claim 8, characterized in that: The center angle of the arc groove is 30°.

10. The flow rate stepless adjustment nozzle according to claim 9, characterized in that: The bottom of the piston cavity is sealed with a sealing seat, and the inlet of the release agent is opened on the sealing seat.

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