High-precision two-component plunger valve and application method thereof

Abstract

The invention relates to the technical field of dispensing equipment, in particular to a high-precision two-component plunger valve and an application method thereof.The high-precision two-component plunger valve comprises a base and a dispensing head, glue flowing holes are symmetrically formed in the dispensing head about the axis of the dispensing head, a first metering piece and a second metering piece which are the same in structure are arranged on the base, and the first metering piece comprises a metering block arranged on the base; a glue inlet valve and a plunger pipe are arranged on the metering block, a metering column is coaxially arranged on the plunger pipe in a sliding mode, a sealing piece is arranged between the metering column and the inner side wall of the plunger pipe, a first pneumatic valve is communicated between one glue flowing hole in the dispensing head and the plunger pipe, and a second pneumatic valve is communicated between the glue inlet valve and the plunger pipe; the first pneumatic valve and the second pneumatic valve are both communicated with the same end of the plunger pipe and are both electrically connected to a control system, and a control metering piece for controlling the sliding distance of the metering column is arranged on the base. The invention has the effects of any glue proportion and no need of debugging.

Description

Technical Field

[0001] The present application relates to the technical field of dispensing equipment, and in particular to a high-precision two-component plunger valve and an application method thereof. Background Art

[0002] Glue dispensing equipment is a machine used for dispensing, coating, spraying, pouring and sprinkling glue, and is widely used in any process involving glue dispensing and fluid control in industrial production. These devices can realize automatic glue dispensing by accurately controlling the flow and position of glue, thereby improving production efficiency and product quality, and the glue dispensing valve is one of the core components that affect the accuracy of glue dispensing.

[0003] Among them, AB glue is a two-component adhesive, which is composed of glue and hardener. It is a kind of room temperature hardening glue. It needs to be mixed at room temperature before it can harden. Different ratios have different hardening effects. Therefore, the two glues need to be mixed when used, so that two glue injection valves are needed to extract the glue separately and apply it to the surface of the workpiece at the same time.

[0004] A Chinese patent with announcement number CN105381931A discloses an AB glue dispensing machine, which includes a plunger-type dispensing valve for continuously feeding in and out AB glue, a glue pushing mechanism for precisely controlling the amount of glue, and a mechanism for quickly replacing a mixing tube and a dispensing needle. The plunger-type dispensing valve includes two separately separated cavities, namely, an A glue temporary storage cavity and a B glue temporary storage cavity. Each cavity has a rotary switching valve, and the switching valve is provided with a glue inlet, a glue outlet and an inflation port which are interconnected.

[0005] Although the above technology can achieve precise control of the amount of glue dispensed, it can only achieve a combination of AB glue. When workers need to use different proportions of components, they need to manually debug the equipment, and during the debugging process, they need to repeatedly test the debugging results, which is not only time-consuming and labor-intensive, but also wastes a lot of debugging glue, and there are shortcomings. Summary of the invention

[0006] In order to improve the problem of being unable to mix two-component glues with different composition ratios, the present application provides a high-precision two-component plunger valve and an application method thereof.

[0007] In the first aspect, the present application provides a high-precision two-component plunger valve, which adopts the following technical solution: A high-precision two-component plunger valve comprises a base and a dispensing head, wherein the dispensing head is provided with glue flow holes symmetrically about its axis, the base is provided with a first metering piece and a second metering piece of the same structure, the first metering piece comprises a metering block arranged on the base, the metering block is provided with a glue feed valve and a plunger tube, a metering column is coaxially slidably arranged on the plunger tube, a sealing component is provided between the metering column and the inner side wall of the plunger tube, a first pneumatic valve is connected between one of the glue flow holes on the dispensing head and the plunger tube, a second pneumatic valve is connected between the glue feed valve and the plunger tube, the first pneumatic valve and the second pneumatic valve are both connected to the same end of the plunger tube, the first pneumatic valve and the second pneumatic valve are both electrically connected to a control system, and a control metering piece for controlling the sliding distance of the metering column is provided on the base.

[0008] By adopting the above technical scheme, the worker first limits the maximum sliding distance of the metering column by controlling the metering piece, then closes the first pneumatic valve and opens the second pneumatic valve and the glue inlet valve, and then injects the two groups of glue into the glue inlet valve on the first metering piece and the glue inlet valve on the second metering piece respectively, and the two groups of glue are injected into the two plunger tubes respectively, and the metering columns on the plunger tubes slide to their maximum distances under the action of the glue pressure, and then closes the second pneumatic valve and opens the first pneumatic valve, and then controls the metering piece to control the metering columns on the first metering piece and the second metering piece to extrude the glue in the same proportion, and the glue in the plunger tube on the first metering piece and the glue in the plunger tube on the second metering piece flow out from the two glue flow holes on the glue dispensing head in the same proportion, and are mixed and dripped at the glue dripping tip of the glue dispensing head, so as to achieve the mixing of glue in any proportion, and this process only needs to control the maximum sliding distance of the metering columns in the two groups of plunger tubes, without the need for tedious debugging process, and the mixed glue ratio has high precision and low operation difficulty.

[0009] Optionally, the dispensing head is detachably arranged on the metering block, and the metering block is provided with a first flow channel, a second flow channel, a third flow channel and a fourth flow channel, the first flow channel is used to connect one of the glue flow holes on the dispensing head and the first pneumatic valve, the second flow channel is used to connect the first pneumatic valve and the plunger tube, the third flow channel is used to connect the plunger tube and the second pneumatic valve, and the fourth flow channel is used to connect the second pneumatic valve and the glue inlet valve.

[0010] By adopting the above technical solution, the first flow channel, the second flow channel, the third flow channel and the fourth flow channel opened in the metering block provide channels for the glue to flow, and at the same time provide stable structural strength for the extrusion flow of the glue.

[0011] Optionally, the sealing member comprises a retaining ring coaxially arranged on the metering column, the circumferential outer side wall of the retaining ring is in close contact with the circumferential inner side wall of the plunger tube, and a sealing ring is arranged between the retaining ring and the inner side wall of the plunger tube.

[0012] By adopting the above technical solution, the pressure of the glue injected into the plunger tube pushes the metering column to slide stably. The sealing ring reduces the possibility of glue flowing out of the gap between the retaining ring and the inner wall of the plunger tube, and at the same time reduces the possibility of external gas flowing in, which is beneficial to improving the accuracy of the glue injection ratio.

[0013] Optionally, the control metering component includes a support plate slidably arranged on the base, the base is provided with a driving component for driving the support plate to slide, a pressure block is provided on the support plate, the pressure block is used to block the metering column, the pressure block is provided with a metering cylinder electrically connected to the control system, and the piston rod of the metering cylinder is used to block one of the metering columns.

[0014] By adopting the above technical solution, the driving part first controls the support plate to drive the pressure block to slide a certain distance, and then the control system drives the piston rod of the metering cylinder to extend one end distance according to the ratio of the two groups of glue. When the glue is injected into the plunger tube through the glue inlet valve, the pressure of the two groups of glue pushes the metering column to abut the piston rod of the metering cylinder and the pressure block respectively. Since the diameters of the plunger tubes on the first metering part and the second metering part are the same, the sliding distance of the metering column in the plunger tube is the ratio of the glue.

[0015] Optionally, when the pressure block pushes the metering column, the metering cylinder controls the metering column blocked by it to slide in equal proportion to another metering column.

[0016] By adopting the above technical solution, while the support plate pushes the metering column through the pressure block, the piston rod of the metering cylinder also contracts its piston rod proportionally, so that the glue in the plunger tubes on the first metering piece and the second metering piece are squeezed out in the same proportion, so that the two groups of glue flowing out of the dispensing head are always mixed in the same proportion.

[0017] Optionally, the driving member includes a slide rail arranged on the base, a slider is slidably provided on the slide rail, the support plate is arranged on the slider, a screw rod is rotatably provided on the base, a driving block is threadedly connected to the screw rod, the support plate is arranged on the driving block, a driving motor for driving the screw rod to rotate is arranged on the base, and the driving motor is electrically connected to the control system.

[0018] By adopting the above technical solution, the control system starts the drive motor, and the drive motor drives the screw to rotate. Under the restriction of the slide rail and the slider, the screw drives the support plate to slide back and forth along the length direction of the slide rail through the drive block, thereby achieving the effect of accurately extracting glue.

[0019] Optionally, a buffer block is provided on the metering block, a buffer chamber connected to the plunger tube is opened on the buffer block, a pressure relief valve connected to the buffer chamber is opened on the buffer block, and the metering column slides through the buffer block.

[0020] By adopting the above technical solution, when the glue is injected into the plunger tube through the glue inlet valve, the retaining ring pushes and squeezes the air in the buffer chamber, and the air in the buffer chamber is slowly released by the pressure relief valve, thereby reducing the possibility of the metering column being damaged by sliding rapidly and hitting the pressure block under the action of the glue pressure.

[0021] Optionally, a glue mixing head is detachably provided on the glue dispensing head, a glue mixing chamber connected to the glue flow hole is provided in the glue mixing head, and a glue dispensing tube connected to the glue mixing chamber is provided on the glue mixing head.

[0022] By adopting the above technical solution, workers press the glue mixing head to make the two groups of glue flowing out of the glue flow hole of the glue dispensing head preliminarily mixed in the glue mixing chamber of the glue mixing head. Since the diameter of the glue dispensing tube is smaller, the preliminarily mixed glue will be further mixed during the process of flowing out of the glue dispensing tube, which is beneficial to improve the glue curing effect.

[0023] In a second aspect, the present application provides an application method of a high-precision two-component plunger valve, which adopts the following technical solution: An application method of a high-precision two-component plunger valve comprises the following steps: S1, injecting two groups of glue into the glue inlet valve on the first metering member and the glue inlet valve on the second metering member respectively, and then limiting the maximum sliding distance of the metering column on the first metering member and the metering column on the second metering member by the control metering member; S2, closing the first pneumatic valve, opening the second pneumatic valve and the glue inlet valve, and injecting two groups of glue into the plunger tube on the first metering member and the plunger tube on the second metering member respectively, and the metering column slides under the pressure of the glue, and its maximum sliding distance is controlled by the control metering member; S3. Close the second pneumatic valve and open the first pneumatic valve. The glue injected by the glue inlet valve on the first metering piece and the glue injected by the glue inlet valve on the second metering piece flow out from the two glue flow holes on the dispensing head in the same proportion. The two groups of glue mix and drip at the tip of the dispensing head.

[0024] By adopting the above technical solution, the two groups of glue can be quickly mixed in any proportion, and the component ratio of the mixed glue is stable and accurate during the dispensing process, and the process of changing the glue mixing ratio is simple and convenient without debugging.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The worker first limits the maximum sliding distance of the metering column by controlling the metering piece, then closes the first pneumatic valve and opens the second pneumatic valve and the glue inlet valve, and then injects the two groups of glue into the glue inlet valve on the first metering piece and the glue inlet valve on the second metering piece respectively, and the two groups of glue are injected into the two plunger tubes respectively. The metering column on the plunger tube slides to its maximum distance under the action of the glue pressure, and then closes the second pneumatic valve and opens the first pneumatic valve. Then the metering piece controls the metering column on the first metering piece and the metering column on the second metering piece to extrude the glue in the same proportion, and the glue in the plunger tube on the first metering piece and the glue in the plunger tube on the second metering piece flow out in the same proportion from the two glue flow holes on the glue dispensing head respectively, and mix and drip at the glue dripping tip of the glue dispensing head, so as to achieve the mixing of glue in any proportion. This process only needs to control the maximum sliding distance of the metering column in the two groups of plunger tubes, without the need for cumbersome debugging process, and the mixed glue has high ratio accuracy and low operation difficulty; 2. The driving member first controls the support plate to drive the pressing block to slide a certain distance, and then the control system drives the piston rod of the metering cylinder to extend one end distance according to the ratio of the two groups of glue. When the glue is injected into the plunger tube from the glue inlet valve, the pressure of the two groups of glue pushes the metering column to abut the piston rod of the metering cylinder and the pressing block respectively. Since the plunger tubes on the first metering member and the second metering member have the same diameter, the sliding distance of the metering column in the plunger tube is the ratio of the glue; 3. While the support plate pushes the metering column through the pressure block, the piston rod of the metering cylinder also contracts its piston rod in proportion, so that the glue in the plunger tubes on the first metering piece and the second metering piece are squeezed out in the same proportion, so that the two groups of glue flowing out of the dispensing head are always mixed in the same proportion. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 It is a structural schematic diagram of the positional relationship among the support plate, the lead screw and the slide rail in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view showing the positional relationship among the plunger tube, the metering column and the pressing block in the embodiment of the present application.

[0029] Figure 4 It is a cross-sectional view of the positional relationship between the metering block, the first pneumatic valve and the second pneumatic valve in the embodiment of the present application.

[0030] Figure 5 It is a cross-sectional view of the positional relationship among the metering block, the third flow channel and the second pneumatic valve in the embodiment of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. dispensing head; 3. glue flow hole; 4. first metering part; 41. metering block; 42. glue inlet valve; 43. plunger tube; 44. metering column; 45. sealing part; 451. retaining ring; 452. sealing ring; 46. first pneumatic valve; 47. second pneumatic valve; 5. second metering part; 6. control metering part; 61. support plate; 62. driving part; 621. slide rail; 622. slider; 623. screw rod; 624. driving block; 625. driving motor; 63. pressure block; 64. metering cylinder; 7. first flow channel; 8. second flow channel; 9. third flow channel; 10. fourth flow channel; 11. buffer block; 12. buffer chamber; 13. pressure relief valve; 14. glue mixing head; 15. glue mixing chamber; 16. dispensing tube; 17. synchronous belt. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0033] Example 1 The embodiment of the present application discloses a high-precision two-component plunger valve.

[0034] Reference Figure 1 A high-precision two-component plunger valve includes a base 1 and a dispensing head 2, the dispensing head 2 is provided with glue flow holes 3 symmetrically about its axis, a glue mixing head 14 is bolted to the dispensing head 2, a glue mixing chamber 15 connected to the glue flow holes 3 is provided in the glue mixing head 14, a dispensing tube 16 connected to the glue mixing chamber 15 is integrally formed on the glue mixing head 14, and a first metering member 4 and a second metering member 5 with the same structure are arranged on the base 1.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The first metering component 4 includes a metering block 41 bolted to the base 1, the dispensing head 2 is bolted to the metering block 41, a glue inlet valve 42 and a plunger tube 43 are bolted to the metering block 41, a metering column 44 is coaxially slidably arranged on the plunger tube 43, and a sealing component 45 is arranged between the metering column 44 and the inner wall of the plunger tube 43.

[0036] Reference Figure 1 , Figure 3 and Figure 4 The sealing member 45 comprises a retaining ring 451 coaxially welded to the metering column 44, the circumferential outer wall of the retaining ring 451 is in close contact with the circumferential inner wall of the plunger tube 43, a sealing ring 452 is arranged between the retaining ring 451 and the inner wall of the plunger tube 43, a buffer block 11 is bolted to the metering block 41, a buffer chamber 12 connected to the plunger tube 43 is provided on the buffer block 11, a pressure relief valve 13 connected to the buffer chamber 12 is provided on the buffer block 11, and the metering column 44 slides through the buffer block 11.

[0037] Reference Figure 3 , Figure 4 and Figure 5 A first flow channel 7, a second flow channel 8, a third flow channel 9 and a fourth flow channel 10 are provided on the metering block 41. A first pneumatic valve 46 is connected between one of the glue flow holes 3 on the dispensing head 2 and the plunger tube 43. The first flow channel 7 is used to connect one of the glue flow holes 3 on the dispensing head 2 and the first pneumatic valve 46, and the second flow channel 8 is used to connect the first pneumatic valve 46 and the plunger tube 43.

[0038] Reference Figure 3 , Figure 4 and Figure 5 A second pneumatic valve 47 is connected between the glue inlet valve 42 and the plunger tube 43. The third flow channel 9 is used to connect the plunger tube 43 and the second pneumatic valve 47. The fourth flow channel 10 is used to connect the second pneumatic valve 47 and the glue inlet valve 42. The first pneumatic valve 46 and the second pneumatic valve 47 are both connected to the same end of the plunger tube 43. The first pneumatic valve 46 and the second pneumatic valve 47 are both electrically connected to the control system. A control metering component 6 for controlling the sliding distance of the metering column 44 is arranged on the base 1.

[0039] The worker first limits the maximum sliding distance of the metering column 44 by controlling the metering piece 6, and then closes the first pneumatic valve 46 on the first metering piece 4 and the first pneumatic valve 46 on the second metering piece 5, and simultaneously opens the second pneumatic valve 47 and the glue inlet valve 42 on the first metering piece 4 and the second pneumatic valve 47 and the glue inlet valve 42 on the second metering piece 5, and then injects the two groups of glue into the glue inlet valve 42 on the first metering piece 4 and the glue inlet valve 42 on the second metering piece 5 respectively.

[0040] The glue flows into the plunger tube 43 along the glue inlet valve 42, the fourth flow channel 10, the second pneumatic valve 47, the third flow channel 9 and the plunger tube 43 in this order. Since the first pneumatic valve 46 is closed, the glue pressure in the plunger tube 43 continues to increase, and the glue pushes the metering column 44 to move. Since the plunger tube 43 on the first metering piece 4 and the plunger tube 43 on the second metering piece 5 have the same diameter, the ratio of the moving distance of the metering column 44 on the first metering piece 4 to the moving distance of the metering column 44 on the second metering piece 5 is the ratio of the two groups of glue.

[0041] Then the control system closes the second pneumatic valve 47 on the first metering member 4 and the second pneumatic valve 47 on the second metering member 5, and simultaneously opens the first pneumatic valve 46 on the first metering member 4 and the first pneumatic valve 46 on the second metering member 5, and controls the metering member 6 to reset the metering column 44 in proportion.

[0042] The glue in the plunger tube 43 flows out from the glue flow hole 3 along the plunger tube 43, the second flow channel 8, the first pneumatic valve 46, the first flow channel 7 and the dispensing head 2 in this order, so that the glue flowing out of the two glue flow holes 3 on the dispensing head 2 always flows out in the same proportion and is preliminarily mixed. After the two groups of glue are mixed in the mixing chamber 15, they flow out from the dispensing tube 16 for further mixing.

[0043] Reference Figure 1 and Figure 2 The control metering member 6 includes a support plate 61 slidably arranged on the base 1, a driving member 62 for driving the support plate 61 to slide is arranged on the base 1, the driving member 62 includes a slide rail 621 bolted to the base 1, a slider 622 slides on the slide rail 621, the support plate 61 is bolted to the slider 622, a screw rod 623 is rotatably connected to the base 1, a driving block 624 is threadedly connected to the screw rod 623, the support plate 61 is bolted to the driving block 624, a driving motor 625 is bolted to the base 1, and a synchronous belt 17 is arranged between the output shaft of the driving motor 625 and the screw rod 623.

[0044] Reference Figure 1 , Figure 3 and Figure 4 The driving motor 625 can adopt the forward and reverse motor in the prior art, and the driving motor 625 is electrically connected to the control system. A pressure block 63 is bolted on the support plate 61, and the pressure block 63 is used to block the metering column 44. A metering cylinder 64 electrically connected to the control system is bolted on the pressure block 63, and the piston rod of the metering cylinder 64 is used to block one of the metering columns 44. When the pressure block 63 pushes the metering column 44, the metering cylinder 64 controls the blocked metering column 44 to slide in proportion to the other metering column 44.

[0045] The control system starts the drive motor 625, and the drive motor 625 drives the screw rod 623 to rotate. Under the restriction of the slide rail 621 and the slider 622, the screw rod 623 drives the support plate 61 to make reciprocating sliding motion along the length direction of the slide rail 621 through the drive block 624. When the support plate 61 drives the pressure block 63 away from the metering column 44 to the maximum distance, the control system starts the metering cylinder 64 to extend the piston rod of the metering cylinder 64 to a certain distance.

[0046] When the glue pressure in the plunger tube 43 pushes the two metering columns 44 to respectively abut against the piston rods of the pressure block 63 and the metering cylinder 64, since the inner diameters of the two groups of plunger tubes 43 are the same, the sliding distance of the two metering columns 44 is the ratio of the two groups of glue. When the pressure block 63 pushes the metering column 44 to squeeze the glue in the plunger tube 43, the control system starts the metering cylinder 64, and the piston rod of the metering cylinder 64 continuously contracts, so that the glue in the two groups of plunger tubes 43 is always squeezed out in the same proportion.

[0047] The implementation principle of Example 1 is as follows: the worker first limits the maximum sliding distance of the metering column 44 by controlling the metering piece 6, and then closes the first pneumatic valve 46 on the first metering piece 4 and the first pneumatic valve 46 on the second metering piece 5, and simultaneously opens the second pneumatic valve 47 and the glue inlet valve 42 on the first metering piece 4 and the second pneumatic valve 47 and the glue inlet valve 42 on the second metering piece 5, and then injects the two groups of glue into the glue inlet valve 42 on the first metering piece 4 and the second glue inlet valve 42 on the second metering piece 5 respectively.

[0048] The glue flows into the plunger tube 43 along the glue inlet valve 42, the fourth flow channel 10, the second pneumatic valve 47, the third flow channel 9 and the plunger tube 43 in this order. Since the first pneumatic valve 46 is closed, the glue pressure in the plunger tube 43 continues to increase, and the glue pushes the metering column 44 to move. Since the plunger tube 43 on the first metering piece 4 and the plunger tube 43 on the second metering piece 5 have the same diameter, the ratio of the moving distance of the metering column 44 on the first metering piece 4 to the moving distance of the metering column 44 on the second metering piece 5 is the ratio of the two groups of glue.

[0049] Then the control system closes the second pneumatic valve 47 on the first metering member 4 and the second pneumatic valve 47 on the second metering member 5, and simultaneously opens the first pneumatic valve 46 on the first metering member 4 and the first pneumatic valve 46 on the second metering member 5, and controls the metering member 6 to reset the metering column 44 in proportion.

[0050] The glue in the plunger tube 43 flows out from the glue flow hole 3 along the plunger tube 43, the second flow channel 8, the first pneumatic valve 46, the first flow channel 7 and the dispensing head 2 in this order, so that the glue flowing out of the two glue flow holes 3 on the dispensing head 2 always flows out in the same proportion and is preliminarily mixed. After the two groups of glue are mixed in the mixing chamber 15, they flow out from the dispensing tube 16 for further mixing.

[0051] The control system starts the drive motor 625, and the drive motor 625 drives the screw rod 623 to rotate. Under the restriction of the slide rail 621 and the slider 622, the screw rod 623 drives the support plate 61 to make reciprocating sliding motion along the length direction of the slide rail 621 through the drive block 624. When the support plate 61 drives the pressure block 63 away from the metering column 44 to the maximum distance, the control system starts the metering cylinder 64 to extend the piston rod of the metering cylinder 64 to a certain distance.

[0052] When the glue pressure in the plunger tube 43 pushes the two metering columns 44 to respectively abut against the piston rods of the pressure block 63 and the metering cylinder 64, since the inner diameters of the two groups of plunger tubes 43 are the same, the sliding distance of the two metering columns 44 is the ratio of the two groups of glue. When the pressure block 63 pushes the metering column 44 to squeeze the glue in the plunger tube 43, the control system starts the metering cylinder 64, and the piston rod of the metering cylinder 64 continuously contracts, so that the glue in the two groups of plunger tubes 43 is always squeezed out in the same proportion.

[0053] Example 2 Embodiment 2 of the present application discloses an application method of a high-precision two-component plunger valve, comprising the following steps: S1, the worker connects two groups of glue to two groups of glue inlet valves 42 on the metering block 41 respectively; S2. The individual starts the control system, and the control system starts the drive motor 625. The drive motor 625 drives the screw rod 623 to rotate, so that the support plate 61 drives the pressing block 63 away from the metering column 44; S3, the control system starts the metering cylinder 64, and the piston rod of the metering cylinder 64 extends a distance, so that the distance between the extended end of the piston rod of the metering cylinder 64 and the side of the pressure block 63 toward the metering column 44 is a multiple of the ratio of the two groups of glue; S4, close the first pneumatic valve 46 and open the second pneumatic valve 47, two groups of glue are injected into the plunger tube 43 through the fourth flow channel 10 and the third flow channel 9, the glue pressure in the plunger tube 43 increases and pushes the metering column 44 close to the pressing block 63, until the two groups of metering columns 44 abut against the piston rods of the pressing block 63 and the metering cylinder 64 respectively; S5, close the second pneumatic valve 47 and open the first pneumatic valve 46, start the drive motor 625 again, the drive motor 625 drives the support plate 61 to drive the pressing block 63 to push the metering column 44 through the screw rod 623, and at the same time, the control system starts the piston rod of the metering cylinder 64 to continuously contract, so that the glue in the two groups of plunger tubes 43 is squeezed out of the dispensing head 2 in the same proportion; S6. The two groups of glue are mixed in the glue mixing head 14 and are mixed again and discharged from the glue dispensing tube 16.

[0054] 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 high-precision two-component plunger valve, characterized in that: The invention comprises a base (1) and a dispensing head (2), wherein the dispensing head (2) is provided with a glue flow hole (3) symmetrically about its axis, and the base (1) is provided with a first metering member (4) and a second metering member (5) having the same structure, wherein the first metering member (4) comprises a metering block (41) arranged on the base (1), wherein the metering block (41) is provided with a glue inlet valve (42) and a plunger tube (43), wherein a metering column (44) is coaxially slidably arranged on the plunger tube (43), and a sealing member (45) is provided between the metering column (44) and the inner side wall of the plunger tube (43). 45), a first pneumatic valve (46) is connected between one of the glue flow holes (3) on the glue dispensing head (2) and the plunger tube (43), a second pneumatic valve (47) is connected between the glue inlet valve (42) and the plunger tube (43), the first pneumatic valve (46) and the second pneumatic valve (47) are both connected to the same end of the plunger tube (43), the first pneumatic valve (46) and the second pneumatic valve (47) are both electrically connected to a control system, and a control metering member (6) for controlling the sliding distance of the metering column (44) is provided on the base (1).

2. A high-precision two-component plunger valve according to claim 1, characterized in that: The dispensing head (2) is detachably arranged on the metering block (41); the metering block (41) is provided with a first flow channel (7), a second flow channel (8), a third flow channel (9) and a fourth flow channel (10); the first flow channel (7) is used to connect one of the dispensing holes (3) on the dispensing head (2) and the first pneumatic valve (46); the second flow channel (8) is used to connect the first pneumatic valve (46) and the plunger tube (43); the third flow channel (9) is used to connect the plunger tube (43) and the second pneumatic valve (47); the fourth flow channel (10) is used to connect the second pneumatic valve (47) and the glue feed valve (42).

3. A high-precision two-component plunger valve according to claim 1, characterized in that: The sealing member (45) comprises a retaining ring (451) coaxially arranged on the metering column (44); the circumferential outer wall of the retaining ring (451) is in close contact with the circumferential inner wall of the plunger tube (43); and a sealing ring (452) is arranged between the retaining ring (451) and the inner wall of the plunger tube (43).

4. A high-precision two-component plunger valve according to claim 3, characterized in that: The control metering member (6) comprises a support plate (61) slidably arranged on the base (1); a driving member (62) for driving the support plate (61) to slide is arranged on the base (1); a pressure block (63) is arranged on the support plate (61); the pressure block (63) is used to block the metering column (44); a metering cylinder (64) electrically connected to the control system is arranged on the pressure block (63); and a piston rod of the metering cylinder (64) is used to block one of the metering columns (44).

5. A high-precision two-component plunger valve according to claim 4, characterized in that: When the pressure block (63) pushes the metering column (44), the metering cylinder (64) controls the metering column (44) blocked by it to slide in equal proportion to the other metering column (44).

6. A high-precision two-component plunger valve according to claim 4, characterized in that: The driving member (62) comprises a slide rail (621) arranged on the base (1), a slider (622) slidingly arranged on the slide rail (621), the support plate (61) being arranged on the slider (622), a screw rod (623) rotatably arranged on the base (1), a driving block (624) being threadedly connected to the screw rod (623), the support plate (61) being arranged on the driving block (624), a driving motor (625) driving the screw rod (623) to rotate being arranged on the base (1), and the driving motor (625) being electrically connected to a control system.

7. A high-precision two-component plunger valve according to claim 4, characterized in that: The metering block (41) is provided with a buffer block (11), the buffer block (11) is provided with a buffer chamber (12) connected to the plunger tube (43), the buffer block (11) is provided with a pressure relief valve (13) connected to the buffer chamber (12), and the metering column (44) slides through the buffer block (11).

8. The high-precision two-component plunger valve according to claim 1, characterized in that: The glue dispensing head (2) is detachably provided with a glue mixing head (14), the glue mixing head (14) is provided with a glue mixing chamber (15) connected to the glue flow hole (3), and the glue dispensing tube (16) connected to the glue mixing chamber (15) is provided on the glue mixing head (14).

9. An application method of the high-precision two-component plunger valve according to any one of claims 1 to 8, characterized in that: The steps include: S1, injecting two groups of glue into the glue inlet valve (42) on the first metering member (4) and the glue inlet valve (42) on the second metering member (5) respectively, and then limiting the maximum sliding distance of the metering column (44) on the first metering member (4) and the metering column (44) on the second metering member (5) by the control metering member (6); S2, closing the first pneumatic valve (46), opening the second pneumatic valve (47) and the glue inlet valve (42), and injecting two groups of glue into the plunger tube (43) on the first metering member (4) and the plunger tube (43) on the second metering member (5) respectively, and the metering column (44) slides under the pressure of the glue, and its maximum sliding distance is controlled by the control metering member (6); S3, close the second pneumatic valve (47), open the first pneumatic valve (46), the glue injected by the glue inlet valve (42) on the first metering member (4) and the glue injected by the glue inlet valve (42) on the second metering member (5) flow out from the two glue flow holes (3) on the dispensing head (2) in the same proportion, and the two groups of glue are mixed and dripped at the tip of the dispensing head (2).

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