High-precision dispensing gun

Abstract

This utility model relates to a high-precision dispensing gun, including a mounting base and a movable base slidably connected to it longitudinally; the movable base is provided with a sealing air chamber longitudinally and a guide hole penetrating its upper and lower ends, a matching guide shaft is slidably arranged in the guide hole, the lower end of the guide shaft extends out of the guide hole and is connected to a dispensing nozzle; the guide shaft is provided with an air passage penetrating its two ends, a pneumatic switch for opening and closing the dispensing nozzle is provided in the air passage, and an air supply nozzle is provided at the upper end of the air passage; a piston-type drive mechanism for driving the guide shaft to move up and down is provided in the sealing air chamber; the overall structure of this utility model is simple and compact, and the size is small. Through the cooperation of the guide shaft and the piston-type drive mechanism, the fine up and down position adjustment of the dispensing nozzle can be realized. During the adjustment process, it can work independently with other nozzles without affecting the working state of other nozzles.

Description

Technical Field

[0001] This utility model relates to the field of dispensing equipment technology, and in particular to a high-precision dispensing gun. Background Technology

[0002] A drip molding machine is used to make drip molded picture frames, drip molded bag labels, etc. The machine mainly relies on a three-dimensional motion system to guide the PVC paste dispensing gun to the designated position on the drip molding mold. The amount of glue dispensed is controlled by adjusting the resin extrusion time and the gun's movement speed. Drip molding machines primarily utilize CNC machining technology to automate the manual dispensing process, significantly improving production efficiency. Most drip molding machines use a crossbar mounted on a motion system. This crossbar moves in three-dimensional space, and several dispensing guns are mounted on it. Different colored liquid materials are connected to different dispensing guns for output, and then the material is dripped onto the mold to achieve the drip molding process.

[0003] When dispensing material, the dispensing guns descend to a distance close to the mold. The length of each dispensing gun in the dispensing direction cannot be fine-tuned; the dispensing guns can only be moved to their specific positions by the motion system of the dispensing machine, which moves the entire crossbar. However, the motion system can only move the crossbar simultaneously, thus moving all the dispensing guns. When only one or more dispensing guns are dispensing, the other guns interfere with the dispensing guns. Therefore, it is necessary to propose a gun holder structure specifically for fixing the dispensing guns to meet production requirements. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-precision dispensing gun that can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows: A high-precision dispensing gun is provided, including a mounting base and a movable base slidably connected thereto in the longitudinal direction; the movable base is provided with a sealing air chamber in the longitudinal direction and a guide hole extending through its upper and lower ends; a matching guide shaft is slidably disposed in the guide hole in the axial direction; the lower end of the guide shaft extends out of the guide hole and is connected to a dispensing nozzle; an air passage is provided in the guide shaft through its two ends; a pneumatic switch for opening and closing the dispensing nozzle is provided in the air passage; an air supply nozzle is provided at the upper end of the air passage; a piston-type drive mechanism for driving the guide shaft to move up and down is provided in the sealing air chamber.

[0006] The high-precision dispensing gun of this utility model includes a piston-type drive mechanism comprising a first piston adapted to the sealed air chamber, a drive shaft that moves downward through the sealed air chamber, and a first elastic reset member disposed below the first piston to provide it with an upward elastic reset force; the upper end of the sealed air chamber has an air nozzle for supplying air; the upper end of the drive shaft is connected to the lower end of the first piston, and the lower end is connected to the guide shaft through a connecting member.

[0007] The high-precision dispensing gun of this utility model includes a connecting component comprising a C-shaped clamp and a tightening bolt threaded through the two arms of the C-shaped clamp; the inner cavity of the C-shaped clamp is provided with two positioning grooves at both ends, which are adapted to the drive shaft and the guide shaft.

[0008] The high-precision dispensing gun of this utility model has an inlet on the side wall of the dispensing nozzle that communicates with its internal flow channel; the pneumatic switch includes a plug for sealing the flow channel, a second piston axially movable in the air channel and adapted to its inner diameter, and a connecting shaft connecting the plug and the second piston; the connecting shaft movably passes through the top end of the dispensing nozzle; when the dispensing nozzle is in the open state, the plug is located in the inlet.

[0009] The high-precision dispensing gun of this utility model has a second piston located at the lower end of the air passage, and a second elastic reset member is provided below the second piston to provide an upward elastic reset force for the second piston; when the dispensing nozzle is in the closed state, the second piston moves downward and the plug is located in the flow channel.

[0010] The high-precision dispensing gun of this utility model includes an adjustment mechanism on the mounting base for adjusting the vertical position of the movable base.

[0011] The high-precision dispensing gun of this utility model includes an adjustment mechanism comprising a strip-shaped component longitudinally disposed at the rear end of the movable seat, a strip-shaped groove at the front end of the mounting seat for the strip-shaped component to move up and down, and a positioning groove on the left or right inner wall of the strip-shaped groove; the adjustment mechanism also includes a clamping block movably disposed in the positioning groove, and a driving bolt for driving the clamping block to clamp the strip-shaped component against the inner wall of the other side of the strip-shaped groove.

[0012] The high-precision dispensing gun of this utility model has the following features: the lower inner wall of the positioning groove is an inclined surface that slopes away from the strip groove; the lower end of the clamping block is provided with a guide slope that matches the inclined surface; the driving bolt is vertically arranged and its lower end is rotatably connected to the clamping block, while its upper end passes through the upper end of the mounting base; when the clamping block and the strip are clamped in place, the inclined surface and the guide slope are in close contact.

[0013] The high-precision dispensing gun of this utility model has a first limiting boss on the left or right side wall of the strip-shaped component, and a second limiting boss located in front of the first limiting boss on the side wall of the strip-shaped groove. There is a pre-adjustment gap between the first limiting boss and the second limiting boss. When the movable seat moves forward into position, the rear side wall of the first limiting boss and the front side wall of the second limiting boss abut against each other.

[0014] The high-precision dispensing gun of this utility model has a connecting component on the upper end of the rear side wall of the mounting base for detachable connection with an external mounting frame. The connecting assembly includes a movable clamping seat disposed above the mounting base. The upper part of the rear side wall of the mounting base is provided with a rearward first extension. The rear end of the movable clamping seat is provided with a second extension corresponding to the first extension. The space between the first extension and the second extension forms a clamping gap. The connecting assembly also includes a locking bolt facing downward to fasten the movable clamping seat to the upper end face of the mounting base.

[0015] The advantages of this utility model are as follows: the overall structure of this utility model is simple and compact, and the size is small. Through the cooperation of the guide shaft and the piston-type drive mechanism, the up and down fine position adjustment of the drip molding nozzle can be realized with high precision. During the adjustment process, it can work independently with other nozzles without affecting the working state of other nozzles. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is an overall bird's-eye view of this utility model.

[0017] Figure 2 yes Figure 1 Exploded view.

[0018] Figure 3 yes Figure 2 A bottom view from the rear of the center movable seat.

[0019] Figure 4 This is a longitudinal sectional view of the front and rear directions of this utility model.

[0020] Figure 5 yes Figure 4 A magnified view of the local structure. Detailed Implementation

[0021] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The high-precision glue dispensing gun of the preferred embodiment of this utility model, such as Figure 1-5 As shown, it includes a mounting base 10 and a movable base 20 that is slidably connected to it in the longitudinal direction; wherein, both the mounting base 10 and the movable base 20 are vertical quadrangular prism structures.

[0027] The movable seat 20 has a cylindrical sealing air chamber 30 longitudinally arranged on it, and a guide hole 40 that passes through the upper and lower ends of the movable seat 20. A matching guide shaft 50 is axially slidable in the guide hole 40. The lower end of the guide shaft 50 extends out of the guide hole 40 and is connected to a drip nozzle 60. The upper and lower end walls of the sealing air chamber 30 in the movable seat 20 are both made of sealing heads 70 that are threadedly connected to the movable seat 20. The sealing heads 70 are coaxial with the sealing air chamber 30 to facilitate the early processing and manufacturing and the later disassembly and maintenance.

[0028] Furthermore, the guide shaft 50 is provided with air passages 51 running through both ends of it. A pneumatic switch 80 for opening and closing the dispensing nozzle 60 is located within the air passages 51, and an air supply nozzle 300 is located at the upper end of the air passages 51. A piston-type drive mechanism 90 for driving the guide shaft 50 to move up and down is located within the sealed air chamber 30. The dispensing gun of this design has a simple and compact overall structure and small size. During operation, the guide shaft 50 and the piston-type drive mechanism 90 can be used to achieve fine up-and-down position adjustment of the dispensing nozzle 60. During adjustment, it can work independently of other nozzles without affecting their operation. Moreover, the guide shaft 50 also serves as the switch drive for the dispensing nozzle 60. Compared to using a simple functional structure stacking method, this further reduces the overall structure of the dispensing gun, avoiding excessive size.

[0029] In this embodiment, the piston-type drive mechanism 90 includes a first piston 91 adapted to the sealed air chamber 30, a drive shaft 92 that moves downward through the sealed air chamber 30, and a first elastic reset member 93 located below the first piston 91 and providing an upward elastic reset force to the first piston 91; the upper end of the sealed air chamber 30 has a sealing head 70 through which a gas nozzle 100 for supplying air is provided, and the gas nozzle 100 is connected to an external air pressure source; while the lower sealing head 70 has a through hole 71 coaxially provided for the drive shaft 92 to move through, and a sealing ring is provided on the inner wall of the through hole 71 to prevent air leakage when the drive shaft 92 moves up and down; the upper end of the drive shaft 92 is connected to the lower end of the first piston 91, and the lower end is connected to the guide shaft 50 through the connecting member 110.

[0030] The first elastic reset element 93 is a spring, but it can also be a metal sheet with good elasticity, a rubber pad, or a miniature gas spring.

[0031] In this embodiment, the connecting member 110 includes a C-shaped clamping sleeve 111 and a tightening bolt 112 threaded through both arms of the C-shaped clamping sleeve 111. The inner cavity of the C-shaped clamping sleeve 111 has two positioning grooves at both ends that are adapted to the drive shaft 92 and the guide shaft 50, respectively. The diameter of the drive shaft 92 is smaller than the diameter of the guide shaft 50. The positioning groove 921 adapted to the drive shaft 92 is directly formed through the gap between the two arms of the C-shaped clamping sleeve 111. When assembled, the sidewall of the drive shaft 92 is in close contact with the inner walls of the two arms of the C-shaped clamping sleeve 111. The positioning groove 501 adapted to the guide shaft 50 is formed by the grooves on the opposite sidewalls of the two arms of the C-shaped clamping sleeve 111. Through the cooperation of the C-shaped clamping sleeve 111 and the tightening bolt 112, the guide shaft 50 and the drive shaft 92 can be quickly disassembled and installed.

[0032] In this embodiment, the side wall of the drip nozzle 60 is provided with an inlet 602 communicating with its internal flow channel 601; the pneumatic switch 80 includes a plug 81 for sealing the flow channel, a second piston 82 axially movably disposed in the air passage 51 and adapted to its inner diameter, and a connecting shaft 83 connecting the plug 81 and the second piston 82; the connecting shaft 83 movably passes through the top end of the drip nozzle 60 through a movable hole on the top surface of the drip nozzle 60 and extends downward into the flow channel to connect with the plug 81, wherein the diameter of the inlet is larger than the diameter of the plug 81; when the drip nozzle... When the nozzle 60 is open, the air passage 51 is under negative pressure. The second piston 82 moves upward to pull the plug 81 upward so that it is located in the glue inlet. At this time, the molten glue in the glue inlet can enter the flow channel and flow out from its lower end. The up and down movement of the piston can be achieved by installing an upward pulling or upward pushing elastic element in the air passage 51, or by installing an upward pulling elastic element for the plug 81 in the glue inlet or an upward pushing elastic element in the flow channel. When closed, the plug 81 is located in the flow channel and blocks it.

[0033] In this embodiment, preferably, the second piston 82 is located at the lower end of the air passage 51, and a second elastic reset member 120 is provided below the second piston 82 to provide an upward elastic reset force for the second piston 82. When the drip nozzle 60 is open, the air pressure in the air passage 51 is at normal pressure or the downward pressure of the air pressure on the second piston 82 is less than the upward reset force of the second elastic reset member 120. At this time, the second elastic reset member 120 pushes the second piston 82 upward, and drives the connecting shaft 83 and the plug 81 to move upward synchronously and remove the flow channel 601. At this time, the glue inlet 602 and the flow channel 601 are connected, and the molten glue can flow normally for drip dispensing. When the drip nozzle 60 is closed, the air pressure in the air passage 51 is at high pressure. The high pressure presses the second piston 82 downward, and causes the connecting shaft 83 and the plug 81 to move downward synchronously and enter the flow channel 601, thereby blocking the flow channel 601, thereby realizing the pneumatic opening and closing control of the drip nozzle 60.

[0034] The second elastic reset member 120 is a spring, but it can also be a metal sheet or a rubber pad with good elasticity. The upper end face of the drip nozzle 60 has a coaxially protruding connecting platform 130, and the lower end face of the guide shaft 50 is provided with a connecting groove 140 that is adapted to the connecting platform 130. The outer side wall of the connecting platform 130 and the inner side wall of the connecting groove 140 are threadedly connected. Furthermore, the upper end face of the connecting platform 130 is coaxially provided with a mounting groove 150, the lower end of the second elastic reset member 120 is located in the mounting groove 150, and the connecting shaft 83 coaxially passes through the bottom surface of the mounting groove 150.

[0035] In this embodiment, the mounting base 10 is provided with an adjustment mechanism 160 for adjusting the vertical position of the movable seat 20. Specifically, the adjustment mechanism 160 includes a strip-shaped member 161 integrally disposed longitudinally at the rear end of the movable seat 20. The front end of the mounting base 10 is provided with a strip-shaped groove 102 for the strip-shaped member 161 to move vertically. The upper end of the strip-shaped groove 102 penetrates the mounting base 10. A positioning groove 170 is provided on the left or right inner wall of the strip-shaped groove 102. Furthermore, the adjustment mechanism 160 also includes a pressing block 162 movably disposed in the positioning groove 170, and a driving mechanism. The clamping block 162 presses the strip 161 against the drive bolt 163 on the other side inner wall of the strip groove 102; further, the lower inner wall of the positioning groove 170 is an inclined surface 171 that is inclined in the direction away from the strip groove 102, and the lower end of the clamping block 162 is provided with a guide inclined surface 1621 that is adapted to the inclined surface; the drive bolt 163 is vertically set and its lower end is rotatably connected to the clamping block 162, and its upper end passes through the upper end of the mounting base 10; when the clamping block 162 and the strip 161 are pressed into place, the inclined surface and the guide inclined surface fit together and press tightly.

[0036] In this embodiment, a first limiting boss 180 is provided on the left or right side wall of the strip member 161, and a second limiting boss 190 is provided on the side wall of the strip groove 102, located in front of the first limiting boss 180. There is a pre-adjustment gap between the first limiting boss 180 and the second limiting boss. When the movable seat 20 moves forward into position, the rear side wall of the first limiting boss 180 and the front side wall of the second limiting boss 190 abut against each other. The cooperation of the first limiting boss and the second limiting boss 190 can prevent the movable seat 20 from falling forward off the mounting seat 10.

[0037] In this embodiment, the upper end of the rear sidewall of the mounting base 10 is provided with a connecting assembly 200 for detachable connection with an external mounting bracket. Specifically, the connecting assembly 200 includes a movable clamping seat 201 located above the mounting base 10. The upper part of the rear sidewall of the mounting base 10 is provided with a rearward first extension 101. The rear end of the movable clamping seat 201 is provided with a second extension 2010 corresponding to the first extension 101. The space between the first extension 101 and the second extension 2010 forms a clamping gap. Furthermore, the connecting assembly 200 also includes a locking bolt 202 facing downward to fasten the movable clamping seat 201 to the upper end face of the mounting base 10. During installation, the crossbar is positioned by the clamping cavity, and the movable clamping seat 201 is locked with the locking bolt 202 to fix the mounting base 10 on the crossbar.

[0038] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A high-precision dispensing gun, comprising a mounting seat and a movable seat in longitudinal sliding connection with the mounting seat; characterized in that, The movable seat is longitudinally provided with a sealed air chamber and a guide hole extending through its upper and lower ends. A matching guide shaft is axially slidably provided in the guide hole. The lower end of the guide shaft extends out of the guide hole and is connected to a dispensing nozzle. An air passage is provided in the guide shaft, extending through its two ends. A pneumatic switch for opening and closing the dispensing nozzle is provided in the air passage. An air supply nozzle is provided at the upper end of the air passage. A piston-type drive mechanism for driving the guide shaft to move up and down is provided in the sealed air chamber.

2. The high precision glue gun according to claim 1, wherein, The piston-type drive mechanism includes a first piston adapted to the sealed air chamber, a drive shaft that moves downward through the sealed air chamber, and a first elastic reset member located below the first piston to provide it with an upward elastic reset force; the upper end of the sealed air chamber has an air nozzle for supplying air; the upper end of the drive shaft is connected to the lower end of the first piston, and the lower end is connected to the guide shaft through a connecting member.

3. The high precision glue gun of claim 2, wherein, The connecting component includes a C-shaped clamp and a tightening bolt threaded through both arms of the C-shaped clamp; the inner cavity of the C-shaped clamp is provided with two positioning grooves at both ends, which are adapted to the drive shaft and the guide shaft.

4. The high precision glue gun of claim 1, wherein, The side wall of the drip nozzle is provided with an inlet that communicates with its internal flow channel; the pneumatic switch includes a plug for sealing the flow channel, a second piston that is axially movable in the air channel and adapted to its inner diameter, and a connecting shaft connecting the plug and the second piston; the connecting shaft movably passes through the top of the drip nozzle; when the drip nozzle is in the open state, the plug is located in the inlet.

5. The high precision glue gun of claim 4, wherein, The second piston is located at the lower end of the air passage, and a second elastic reset member is provided below the second piston to provide an upward elastic reset force for the second piston; when the drip nozzle is in the closed state, the second piston moves downward and the plug is located in the flow passage.

6. The high precision glue gun of claim 1, wherein, The mounting base is equipped with an adjustment mechanism for adjusting the vertical position of the movable seat.

7. The high precision glue gun of claim 6, wherein, The adjustment mechanism includes a strip-shaped component longitudinally disposed at the rear end of the movable seat, and a strip-shaped groove for the strip-shaped component to move up and down at the front end of the mounting seat. A positioning groove is provided on the left or right inner wall of the strip-shaped groove. The adjustment mechanism also includes a clamping block movably disposed in the positioning groove, and a driving bolt for driving the clamping block to clamp the strip-shaped component against the inner wall of the other side of the strip-shaped groove.

8. The high precision glue gun of claim 7, wherein, The lower inner wall of the positioning groove is an inclined surface that slopes away from the strip groove. The lower end of the abutment block is provided with a guide slope that matches the inclined surface. The drive bolt is vertically arranged and its lower end is rotatably connected to the abutment block, while its upper end passes through the upper end of the mounting base. When the abutment block and the strip are pressed together, the inclined surface and the guide slope fit together tightly.

9. The high precision glue gun of claim 8, wherein, The left or right side wall of the strip is provided with a first limiting boss, and the side wall of the strip groove is provided with a second limiting boss located in front of the first limiting boss. There is a pre-adjustment gap between the first limiting boss and the second limiting boss. When the movable seat moves forward into position, the rear side wall of the first limiting boss and the front side wall of the second limiting boss abut against each other.

10. The high precision glue gun of claim 1, wherein, The upper rear side wall of the mounting base is provided with a connecting assembly for detachable connection with an external mounting bracket; The connecting assembly includes a movable clamping seat disposed above the mounting base. The upper part of the rear side wall of the mounting base is provided with a rearward first extension. The rear end of the movable clamping seat is provided with a second extension corresponding to the first extension. The space between the first extension and the second extension forms a clamping gap. The connecting assembly also includes a locking bolt facing downward to fasten the movable clamping seat to the upper end face of the mounting base.

Images