Glue supply piezoelectric valve suitable for volatile glue

Abstract

The utility model discloses a glue supply piezoelectric valve suitable for volatile glue, which belongs to the technical field of piezoelectric valve dispensing machines, and comprises a glue barrel, a dispensing head communicated with the lower end of the glue barrel, a firing pin arranged in the dispensing head, a valve body used for driving the firing pin to move up and down, a liquid box and a cushion block, a window is formed in the cushion block and / or the cushion block is made of a heat insulation material, one end of the liquid box is communicated with the glue barrel, the other end of the liquid box is located at the bottom of the valve body, and the glue dispensing head is arranged at the bottom of the end, close to the valve body, of the liquid box. The cushion block is located between the valve body and the liquid box, the firing pin penetrates through the window of the cushion block and the liquid box and then is connected with the dispensing head, the cushion block is arranged on the liquid box to serve as a heat insulation piece, rosin can be effectively cooled in the liquid box and solidified into liquid, and the rosin is prevented from being heated to form gas to enter the valve body.

Description

TECHNICAL FIELD

[0001] The utility model relates to piezoelectric valve point glue machine technical field especially suitable for the glue supply piezoelectric valve of volatile glue. BACKGROUND

[0002] In the field of mechanical manufacturing and electronic equipment assembly, point glue technology is widely used in the bonding and packaging of various precision components. Especially for the application of volatile glue, such as rosin, this glue is favored due to its low melting point and high fluidity. However, these characteristics also bring many challenges, especially in high temperature environment, which is easy to cause the glue to volatilize, thereby causing a series of problems. In order to ensure the stability and reliability of the point glue process, many research and development work focuses on how to effectively control the state of the glue to avoid problems in the use process. At present, the common solution mainly includes the following several kinds: one is to optimize the design of the glue barrel, so that it has better sealing performance and reduces the volatilization of the glue; Two is to use temperature control devices such as heating block and heating assembly to keep the glue in the appropriate working temperature range; Three is to increase additional filter device to prevent volatile matter from entering the key components. In addition, some designs will increase the buffer zone on the glue conveying path to slow down the glue flow rate and further reduce the risk of volatilization.

[0003] The prior art such as Chinese patent publication No. CN219804898U discloses a piezoelectric valve point glue cooling device, which comprises a glue barrel, a point glue head, a glue closing hammer, a piezoelectric valve, a glue cooling member A and a glue cooling member B; the glue cooling member A is sleeved on the outer lower end of the glue barrel, and the glue cooling member B is fixedly arranged outside the point glue head and the glue guide plate.

[0004] The cooling member of the above-mentioned point glue cooling device is relatively complex, which increases the structural complexity of the piezoelectric valve point glue machine and affects the overall production efficiency. UTILITY MODEL CONTENTS

[0005] The utility model relates to a kind of glue supply piezoelectric valve suitable for volatile glue, which can effectively prevent volatile glue from entering the piezoelectric valve.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A glue supply piezoelectric valve suitable for volatile glue, comprising a glue barrel, a glue dispensing head connected to the lower end of the glue barrel, a striker provided in the glue dispensing head, and a piezoelectric valve for driving the striker to move up and down to correspondingly open or close the glue dispensing head, further comprising a liquid box and a cushion block, the cushion block is provided with a window, and / or the material of the cushion block is heat insulation material, one end of the liquid box is connected to the glue barrel, the other end of the liquid box is located at the bottom of the valve body, the glue dispensing head is arranged at the bottom of the end of the liquid box close to the valve body, the cushion block is located between the valve body and the liquid box, and the striker is connected to the glue dispensing head after passing through the window of the cushion block and the liquid box.

[0008] The bottom of the window is provided with a through hole, the diameter of the through hole is greater than the diameter of the striker, and the striker is connected to the glue dispensing head by passing through the through hole.

[0009] The two sides of the window are provided with arc-shaped flow channels, and the arc-shaped flow channels are communicated with the through hole.

[0010] The connection block is provided between the glue barrel and the liquid box, the sealing gasket and the sealing ring are arranged in the connection block, the sealing ring is located at the connection position of the connection block and the liquid box, and the sealing gasket is located at the connection position of the glue barrel and the connection block.

[0011] The material of the cushion block can be polyether ether ketone plastic, the liquid box is provided with a liquid inlet flow channel, the liquid inlet flow channel is communicated with the connection block, and the liquid box is made of stainless steel.

[0012] The outer side of the liquid box is provided with a heating block, the outer side of the glue barrel is covered with a heating assembly, and the outer side of the heating assembly is provided with a heat insulation sleeve.

[0013] The piezoelectric valve is internally provided with an adjusting assembly, the adjusting assembly comprises an adjusting rod and an adjusting valve seat, one end of the adjusting valve seat is located above the liquid box and is assembled and connected with the liquid box, the striker is located in the adjusting valve seat, the adjusting rod is installed at the other end of the adjusting valve seat, the adjusting rod drives the adjusting valve seat to move, and then drives the striker to move, so that the distance between the striker and the glue dispensing head is adjusted.

[0014] The utility model discloses a preferred technical scheme is in, still be provided with at least one limit post in piezoelectric valve, limit post is fixed in piezoelectric valve, be provided with limit step on the adjusting valve seat, limit step with limit post are adapted, so that limit step can be clamped on limit post, piezoelectric valve still includes transmission arm post and transmission fixed base, transmission fixed base is fixed in piezoelectric valve, transmission arm post is rotatably installed on transmission fixed base, one end of transmission arm post is rotatably arranged on transmission fixed base, and the other end of transmission arm post is located in adjusting valve seat, and is located between adjusting lever and the striker.

[0015] The utility model discloses a preferred technical scheme is in, install heat dissipation block on the lateral wall of piezoelectric valve, form heat dissipation channel in heat dissipation block.

[0016] The utility model discloses a preferred technical scheme is in, install heat dissipation block on the lateral wall of piezoelectric valve, form heat dissipation channel in heat dissipation block.

[0017] The utility model discloses a kind of beneficial effects:

[0018] The utility model provides a kind of glue supply piezoelectric valve suitable for volatile glue, by setting up cushion block as heat insulating piece on liquid box, and window and through-hole are set up on cushion block, can effectively make rosin cool and solidify into liquid in liquid box, prevent it from heating to form gas into piezoelectric valve. Cushion block can also be simultaneously or separately installed into heat insulating material.Meanwhile, through the synergistic effect of heating block of liquid box and heating assembly of glue barrel, keep glue in suitable working temperature range, ensure the stability and reliability of dispensing process.In addition, the design of adjusting assembly and limit post realizes the accurate control to striker, improves dispensing precision and efficiency.The setting of heat dissipation block and return spring further enhances the heat dissipation performance and response speed of piezoelectric valve, improves the comprehensive performance of whole system. ACCURACY

[0019] Figure 1 It is the whole structure schematic diagram of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0020] Figure 2 It is the whole structure schematic diagram of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0021] Figure 3 It is the whole structure schematic diagram of glue barrel and heating assembly etc. of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0022] Figure 4 It is the whole structure schematic diagram of glue barrel and heating assembly etc. of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0023] Figure 5 is the overall structure schematic diagram of the liquid box and the cushion block of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0024] Figure 6 is the overall structure of the liquid box of the glue supply piezoelectric valve suitable for volatile glue and the section along AA of the liquid box provided in the embodiment of the utility model;

[0025] Figure 7 is the overall structure schematic diagram of the cushion block of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0026] Figure 8 is the overall structure schematic diagram of the cushion block of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0027] Figure 9 is the partial structure schematic diagram of the piezoelectric valve of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0028] Figure 10 is the overall structure schematic diagram of the piezoelectric valve of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0029] Figure 11 is the partial structure schematic diagram of the piezoelectric valve of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0030] Figure 12 is the overall structure schematic diagram of the connecting block of the glue supply piezoelectric valve suitable for volatile glue provided in the embodiment of the utility model;

[0031] In the drawing:

[0032] 1, glue barrel; 2, glue dispensing head; 3, striker; 4, piezoelectric valve; 401, adjusting rod; 402, adjusting valve seat; 403, limiting column; 404, limiting step; 405, transmission arm column; 406, transmission fixed seat; 407, heat dissipation block; 4071, heat dissipation channel; 5, liquid box; 501, liquid inlet channel; 6, cushion block; 601, window; 602, through hole; 603, arc-shaped flow channel; 7, connecting block; 701, sealing gasket; 702, sealing ring; 8, heating block; 9, heating assembly; 10, heat insulation sleeve. EMBODIMENT

[0033] The technical scheme of the utility model will be further illustrated in combination with the drawings and through specific embodiments.

[0034] Example 1

[0035] As Figures 1-12 shown, the utility model provides a kind of glue valve body 4 suitable for volatile glue, including glue bucket 1, glue head 2 being connected with the lower end of glue bucket 1, striker 3 being arranged in glue head 2 and valve body 4 for driving striker 3 up and down movement to correspond to open or close glue head 2.In addition, it also includes liquid box 5 and cushion block 6, and window 601 is formed in cushion block 6.Cushion block 6 is located between valve body 4 and liquid box 5, and striker 3 is connected with glue head 2 after passing through the window 601 of cushion block 6 and liquid box 5, and glue liquid volatilized from liquid box 5 coagulates after meeting the window 601 of cushion block 6, because the cooling area of volatilized glue liquid is increased by window 601, so that the volatilized glue liquid coagulates faster, position is more concentrated, and volatilized glue liquid cannot continue to volatilize to the inside of valve body 4, to prevent volatile glue (such as rosin) from entering valve body 4.

[0036] The bottom of window 601 is provided with through hole 602, and the diameter of through hole 602 is greater than the diameter of striker 3, so that striker 3 is connected with glue head 2 after passing through through hole 602, so that the coagulation position of volatilized glue liquid is limited on window 601, and then flows back to liquid box 5 in through hole 602.

[0037] The two sides of window 601 are provided with arc-shaped flow channel 603, and arc-shaped flow channel 603 is communicated with through hole 602, so that glue can flow along arc-shaped flow channel 603, the flow rate of volatilized glue liquid is slowed down, the cooling and solidification of glue are promoted, the flow rate of coagulated glue liquid is increased, so that glue liquid flows back to liquid box 5 faster.

[0038] Connecting block 7 is arranged between liquid box 5 and glue bucket 1, sealing gasket 701 and sealing ring 702 are arranged in connecting block 7, sealing ring 702 is located at the connecting position of connecting block 7 and liquid box 5, and sealing gasket 701 is located at the connecting position of glue bucket 1 and connecting block 7.Sealing gasket 701 and sealing ring 702 can be made of flexible materials such as rubber or silicone, to ensure good sealing performance and prevent glue leakage.

[0039] Heating block 8 is arranged on the outside of liquid box 5, heating assembly 9 is wrapped on the outside of glue bucket 1, and heat insulation sleeve 10 is arranged on the outside of heating assembly 9.Heating block 8 can be made of electric heating wire or electric heating plate, and the heating power is adjusted by controller to keep the glue in a suitable working temperature range.Heating assembly 9 can be used to heat glue bucket 1, and the material of glue bucket 1 can be Teflon bucket, and heat insulation sleeve 10 can be made of heat insulation materials such as glass fiber or aerogel to reduce heat loss and improve energy utilization efficiency.

[0040] The valve body 4 is internally provided with an adjusting assembly, which comprises an adjusting rod 401 and an adjusting valve seat 402. One end of the adjusting valve seat 402 is located above the liquid box 5 and is connected with the liquid box 5. The striker 3 is located in the adjusting valve seat 402. The adjusting rod 401 is installed at the other end of the adjusting valve seat 402. By controlling the adjusting rod 401 to drive the adjusting valve seat 402 to move, the striker 3 is driven to move, so as to adjust the distance between the striker 3 and the glue dispensing head 2.

[0041] The valve body 4 is further provided with at least one limiting column 403 fixed in the valve body 4. The adjusting valve seat 402 is provided with a limiting step 404. The limiting step 404 is matched with the limiting column 403, so that the limiting step 404 can be clamped on the limiting column 403 to prevent the adjusting valve seat 402 from moving excessively. The valve body 4 further comprises a transmission arm column 405 and a transmission fixed seat 406. The transmission fixed seat 406 is fixed in the valve body 4, and the transmission arm column 405 is rotatably installed on the transmission fixed seat 406. One end of the transmission arm column 405 is rotatably arranged on the transmission fixed seat 406, and the other end is located in the adjusting valve seat 402 and between the adjusting rod 401 and the striker 3. Through the linkage of the transmission arm column, the striker 3 is accurately controlled.

[0042] The side wall of the valve body 4 is provided with a heat dissipation block 407, and a heat dissipation channel 4071 is formed in the heat dissipation block 407. The heat dissipation channel 4071 can be designed in a spiral or grid shape to increase the heat dissipation area and improve the heat dissipation efficiency. The heat dissipation block 407 can also be connected with an external cooling system to further enhance the heat dissipation effect through forced air cooling or water cooling.

[0043] The valve body 4 further comprises a reset spring, which is sleeved on the striker 3. The reset spring can provide a rebound force when the striker 3 moves to the lowest point, so that the striker 3 quickly returns to the initial position, ensuring the rapid response and accuracy of the glue dispensing action. The reset spring can be made of high-strength materials such as stainless steel or spring steel to ensure its reliability and stability during long-term use.

[0044] The liquid box 5 can be made of stainless steel or other corrosion-resistant and high-temperature-resistant metal materials such as titanium alloy or aluminum alloy. The shape of the liquid box 5 can be designed as a cylinder, a rectangle or other shapes according to actual needs to adapt to different installation spaces.

[0045] Example 2

[0046] The difference between the embodiment and the embodiment 1 is that the cushion block 6 is provided with a heat insulation material, preferably polyether ether ketone plastic (PEEK material), and other heat insulation materials such as ceramics or graphite can also be selected, which can effectively accelerate the condensation speed of the volatile glue liquid. At the same time, the height of the cushion block 6 can be appropriately increased, so that the distance between the valve body 1 and the liquid box 5 is increased, so that the path of the volatile glue condensation is longer, and the risk of the volatile glue to the valve body 1 is reduced.

[0047] Embodiment 3

[0048] The embodiment is combined with the embodiment 1 and the embodiment 2, the cushion block 6 is installed with a heat insulation material, and the window 601 is arranged on the cushion block 6, the condensation speed and the path of the volatile glue liquid are increased, and the risk of the volatile glue liquid rising to the valve body 4 is reduced.

[0049] The utility model is described through preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application belong to the protection scope of the utility model.

Claims

1. A glue supply piezoelectric valve suitable for volatile glue, comprising a glue barrel (1), a glue dispensing head (2) in communication with the lower end of the glue barrel (1), a striker (3) arranged in the glue dispensing head (2), and a valve body (4) for driving the striker (3) to move up and down, characterized in that: a liquid box (5) and a cushion block (6) are further included, a window (601) is formed on the cushion block (6), and / or the material of the cushion block (6) is heat insulation material, one end of the liquid box (5) is in communication with the glue barrel (1), the other end of the liquid box (5) is located at the bottom of the valve body (4), the glue dispensing head (2) is arranged at the bottom of the end of the liquid box (5) close to the valve body (4), the cushion block (6) is located between the valve body (4) and the liquid box (5), and the striker (3) is connected with the glue dispensing head (2) after passing through the window (601) of the cushion block (6) and the liquid box (5).

2. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: a through hole (602) is formed at the bottom of the window (601), the diameter of the through hole (602) is greater than the diameter of the striker (3), and the striker (3) is connected with the glue dispensing head (2) by passing through the through hole (602).

3. The glue supply piezoelectric valve suitable for volatile glue according to claim 2, characterized in that: arc-shaped flow channels (603) are arranged on both sides of the window (601), and the arc-shaped flow channels (603) are in communication with the through hole (602).

4. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: a connecting block (7) is arranged between the glue barrel (1) and the liquid box (5), a sealing gasket (701) and a sealing ring (702) are arranged in the connecting block (7), the sealing ring (702) is located at the connection between the connecting block (7) and the liquid box (5), and the sealing gasket (701) is located at the connection between the glue barrel (1) and the connecting block (7).

5. The glue supply piezoelectric valve suitable for volatile glue according to claim 4, characterized in that: the material of the cushion block (6) can be polyether ether ketone plastic; a liquid inlet flow channel (501) is arranged on the liquid box (5), the liquid inlet flow channel (501) is in communication with the connecting block (7), and the liquid box (5) is made of stainless steel.

6. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: a heating block (8) is arranged on the outside of the liquid box (5), a heating assembly (9) is wrapped on the outside of the glue barrel (1), and a heat insulation sleeve (10) is arranged on the outside of the heating assembly (9).

7. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: an adjusting assembly is arranged in the valve body (4). ​ ​ ​ ​ ​ ​ ​ The adjusting assembly comprises an adjusting rod (401) and an adjusting valve seat (402), one end of the adjusting valve seat (402) is located above the liquid box (5) and is assembled and connected with the liquid box (5), the striker (3) is located in the adjusting valve seat (402), the adjusting rod (401) is installed at the other end of the adjusting valve seat (402), the adjusting valve seat (402) is driven to move by controlling the adjusting rod (401), and then the striker (3) is driven to move, so that the distance between the striker (3) and the glue dispensing head (2) is adjusted.

8. The glue supply piezoelectric valve suitable for volatile glue according to claim 7, characterized in that: At least one limiting column (403) is further arranged in the valve body (4), the limiting column (403) is fixed in the valve body (4), a limiting step (404) is arranged on the adjusting valve seat (402), the limiting step (404) is matched with the limiting column (403), so that the limiting step (404) can be clamped on the limiting column (403); The valve body (4) further comprises a transmission arm column (405) and a transmission fixed seat (406), the transmission fixed seat (406) is fixed in the valve body (4), and the transmission arm column (405) is rotatably installed on the transmission fixed seat (406); One end of the transmission arm column (405) is rotatably arranged on the transmission fixed seat (406), the other end of the transmission arm column (405) is located in the adjusting valve seat (402) and between the adjusting rod (401) and the striker (3).

9. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: A heat dissipation block (407) is installed on the side wall of the valve body (4), and a heat dissipation channel (4071) is formed in the heat dissipation block (407).

10. The glue supply piezoelectric valve suitable for volatile glue according to claim 1, characterized in that: The cushion block (6) is entirely installed on the bottom of the valve body (4).

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