A powder dispensing device

Abstract

The utility model discloses a quantitative powder paying device belongs to optical glass secondary compression technology field. It mainly solves the present artificial powder paying volume difference, makes each time production optical glass blank surface release agent thickness different causes the problem of different heating degree and artificial powder paying dust particle inhalation risk. Its main characteristics are: including at least one detachable powder box and quantitative powder paying device main part structure, the quantitative powder paying device main part structure can pass through rotation or replacement and select the unit bin volume size of convertible volume, the quantitative powder paying device main part structure can pass through the switch main lever control switch mechanism and realize the discharge control of the unit bin of convertible volume to release agent powder operation of blank of optical glass secondary compression. The utility model has the advantages of simple operation, stable production, improve production efficiency and reduce the dust risk of operation environment, can cooperate with automatic material placing machine and be mainly used for the blank release agent powder operation of optical glass secondary compression.

Description

Technical Field

[0001] This utility model belongs to the field of secondary pressing technology of optical glass materials, and specifically relates to a quantitative powder application device. Background Technology

[0002] In the secondary molding process of optical glass, the primary purpose of applying release agent powder to the optical glass blank is to facilitate the smooth ejection of the molded part from the mold. A secondary purpose is to ensure the optical glass blank, after being softened by high-temperature baking, can cleanly separate from the ceramic box (or boat) and be transferred to the forming mold. Under the condition of baking and softening the optical glass blank at the same temperature, besides the material type, shape, and size of the blank itself, the thickness of the release agent powder coating on the blank surface has a significant impact on the degree of heating of the blank. Generally, the amount of powder applied is controlled by the operator based on experience, using a spoon as a unit, and subjectively adjusted according to the coverage of the release agent powder on the blank surface after mixing.

[0003] The current method of manually and subjectively judging the amount of powder to be applied to optical glass blanks has the following two shortcomings:

[0004] First, it requires operators to have experience in judging the amount of release agent powder applied. The amount of powder applied directly affects the thickness of the release agent powder that will cover the surface of the optical glass blank to be powdered, which in turn affects the softening and heating effect of the powder-powdered blank in the softening furnace, leading to deviations in the process and secondary pressing production, which is not conducive to stable mass production of products.

[0005] Secondly, manual application of release agent powder increases the risk of dust hazards in the work environment. The fine powder inevitably gets scattered into the work environment during the manual addition of the release agent to the billet pile, increasing the risk of dust hazards and consequently affecting the health of the workers. Utility Model Content

[0006] This utility model provides a quantitative powder dispensing device to solve the above-mentioned technical problems.

[0007] The technical solution of this utility model is: a quantitative powder dispensing device, characterized in that: it includes at least one loadable and detachable powder box and a main structure of the quantitative powder dispensing device; the main structure of the quantitative powder dispensing device can select the appropriate convertible volume unit hopper volume size by rotating or changing it; the main structure of the quantitative powder dispensing device can control the dispensing of the convertible volume unit hopper by pushing the main lever of the switch to control the switching mechanism.

[0008] The technical solution of this utility model can also be: a quantitative powder dispensing device, characterized in that: it consists of a detachable powder box and a main structure of the quantitative powder dispensing device; wherein, the bottom of the detachable powder box is provided with a discharge port and an opening and closing device; the main structure of the quantitative powder dispensing device includes a powder box base at the top, a shell, a bottom plate, a switching mechanism, and a unit hopper with convertible volume; the powder box base and the bottom of the detachable powder box are provided with a movable connecting mechanism, and the powder box base is provided with a feed port that cooperates with the discharge port; the bottom plate is provided with a discharge port; the unit hopper with convertible volume is provided with convertible powder hoppers of different unit volumes and a convertible powder hopper lever, the convertible powder hopper is installed in the cavity corresponding to the shell, and the convertible powder hopper lever is connected to the convertible powder hopper; the convertible powder hopper is provided with a hopper discharge port that cooperates with the discharge port.

[0009] The main structure of the quantitative powder dispensing device in the technical solution of this utility model includes a main shaft, a powder box base, a switching mechanism, a convertible volume unit hopper, a shell, a base plate, a shell limiting structure, and a limiting nut; the powder box base and the bottom of the detachable powder box are provided with a movable connecting mechanism, and the powder box base is provided with a feed through hole that matches the discharge through hole; the base plate is provided with a discharge port; the convertible volume unit hopper is provided with a convertible powder hopper and a convertible powder hopper lever, the convertible powder hopper is installed in the corresponding cavity of the shell, the convertible powder hopper lever is installed in the shell and connected to the convertible powder hopper; the convertible volume unit hopper is provided with a hopper discharge port that matches the discharge port.

[0010] The switching mechanism described in the technical solution of this utility model consists of a switch rotating shaft, a switch main lever, an upper switch secondary lever, a lower switch secondary lever, a switch upper plate, and a switch lower plate. The switch rotating shaft is installed inside the main shaft. The upper switch secondary lever, the switch main lever, and the lower switch secondary lever pass through the main shaft in sequence and are fixed on the switch rotating shaft. The switch upper plate and the switch lower plate pass through the main shaft and are respectively connected to the upper switch secondary lever and the lower switch secondary lever, and are respectively restricted between the powder box base and the outer shell, and between the bottom plate and the limit nut.

[0011] In the technical solution of this utility model, the upper end of the main shaft is connected to the powder box base, and the lower end is fixed above the lower switch plate by a limiting nut; the upper switch plate is provided with a switch upper plate through hole that matches the feed through hole of the powder box base, and the lower switch plate is provided with a switch lower plate through hole that matches the discharge port of the base plate.

[0012] The convertible volume unit hopper in the technical solution of this utility model is located between the outer shell and the bottom plate, including convertible powder hoppers of different volumes and convertible powder hopper levers, which are sleeved on the main shaft between the main switch lever and the lower switch secondary lever; the convertible powder hopper includes a sleeve and unit hoppers of different volumes connected to the sleeve.

[0013] In the technical solution of this utility model, the outer shell is provided with a rotating groove through which the convertible powder hopper lever can pass and rotate; the outer shell is provided with a rotating groove through which the main switch lever can pass and rotate; the upper surface of the upper switch plate has a groove that conforms to the key position of the upper switch secondary lever; the upper surface of the lower switch plate has an arc-shaped groove with a matching angle and a radius equal to the distance from the main shaft to the key position of the lower switch secondary lever; the outer shell limiting structure consists of an outer shell limiting pin and an outer shell limiting pin.

[0014] The removable powder box in the technical solution of this utility model includes a cover plate and a powder box cavity; the powder box cavity is provided with a slope inclined to the discharge hole; the bottom of the removable powder box is provided with a discharge hole and an opening and closing device, the opening and closing device includes a discharge slider and a spring; the discharge slider, spring and discharge hole are located at the bottom of the powder box cavity.

[0015] In the technical solution of this utility model, the cover plate is made of transparent material and has a sealing structure between it and the powder box cavity; the bottom surface of the powder box cavity is provided with a groove facing the discharge through hole; the discharge slider is set in the groove and connected to the spring; when the spring is in an uncompressed state, the discharge slider is in the position of closing the discharge through hole.

[0016] The movable connecting mechanism in the technical solution of this utility model is a unidirectional sliding track; the sliding track includes a limiting groove for the discharge slider at the bottom of the powder box and a limiting groove for fixing the powder box at the top of the powder box base; the powder box base is provided with a stop block to prevent the discharge slider from moving and opening the discharge through hole; the stop block is a cuboid and is located at the middle position between the discharge through hole and the main shaft. The quantitative powder dispensing device can be installed on the vibrating crucible of an automatic feeding machine and used in conjunction with the automatic feeding machine.

[0017] The beneficial effects of this utility model are:

[0018] 1. This quantitative powder dispensing device transforms manual control of powder dispensing into mechanical control, ensuring the consistency of the release agent powder coverage thickness of optical glass blanks in mass production, providing a foundation for stable heating of the blanks, and thus reducing production and debugging costs.

[0019] 2. This quantitative powder application device effectively isolates the operator from contact with the release agent powder during the powder application stage of optical glass secondary molding production, while preventing the release agent powder from turning into dust, thus reducing the risk of the working environment.

[0020] This invention has the advantages of simple operation, ensuring stable product production, improving production efficiency, and effectively improving the working environment. This invention is mainly used for the quantitative powder application of preforms before secondary molding of optical glass. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the isometric structure of Embodiment 1 of this utility model.

[0022] Figure 2 This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0023] Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the detachable powder box of Embodiment 1 of this utility model when it is not installed.

[0025] Figure 5 This is an isometric sectional view of the powder box base, outer shell, bottom plate, and outer shell limiting structure of Embodiment 1 of this utility model.

[0026] Figure 6 This is a schematic diagram of the isoaxial structure of the switching mechanism of Embodiment 1 of this utility model.

[0027] Figure 7 This is a schematic diagram of the switching mechanism of Embodiment 1 of this utility model.

[0028] Figure 8 This is a schematic diagram of the isoaxial structure of a unit silo with convertible volume according to Embodiment 1 of this utility model.

[0029] Figure 9 This is a schematic diagram of the isometric sectional view of Embodiment 2 of this utility model.

[0030] Figure 10 This is a schematic diagram of the isometric side section of Embodiment 3 of this utility model.

[0031] Figure 11 This is a schematic diagram of the isometric side section of Embodiment 4 of this utility model.

[0032] The diagram is labeled as follows: 100 - Removable powder box; 110 - Cover plate; 120 - Powder box cavity; 131 - Discharge slider; 132 - Spring; 200 - Main structure of the quantitative powder dispensing device; 210 - Main shaft; 220 - Powder box base; 230 - Switching mechanism; 231 - Switching rotating shaft; 232 - Main switch lever; 233 - Upper secondary switch lever; 234 - Lower secondary switch lever; 235 - Upper switch plate. ; 236- Switch lower plate; 240- Convertible volume unit hopper; 241- Convertible powder hopper; 242- Convertible powder hopper lever; 251- Outer shell; 252- Base plate; 260- Outer shell limiting structure; 261- Outer shell limiting; 262- Outer shell limiting pin; 270- Limiting nut; 243- Powder hopper with pull-out and replacement of different diameter through holes; 244- Powder hopper limiting pin; 245- Through hole module. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Example 1:

[0035] like Figures 1 to 8 As shown, this utility model is a quantitative powder dispensing device, including a detachable powder box 100 and a main structure 200 for the quantitative powder dispensing device.

[0036] The removable powder box 100 includes a removable powder box cover 110, a powder box cavity 120, a discharge slider 131, and a spring 132. The cover 110 is made of transparent material and has a sealing structure between it and the powder box cavity 120. The bottom of the powder box cavity 120 has a discharge through hole, and the cavity has a ramp inclined towards the discharge through hole. The discharge slider 131 and the spring 132 constitute the opening and closing device of the discharge through hole, and are set at the bottom of the powder box cavity 120. The bottom surface of the powder box cavity 120 has a groove facing the discharge through hole. The discharge slider 131 is set in the groove and connected to the spring 132. When the spring 132 is in an uncompressed state, the discharge slider 131 is in the closed position of the discharge through hole. The opening and closing of the discharge through hole is controlled by the spring 132 and the discharge slider 131. The bottom surface of the powder box cavity 120 is provided with a discharge slider 131 limiting groove for unidirectional installation and cooperation with the powder box base 220 of the main structure 200 of the quantitative powder dispensing device, which can fix the detachable powder box 100. The detachable powder box 100 is fixed on the powder box base 220 by unidirectional loading and unloading, and its function is to provide release agent powder as a replaceable powder box.

[0037] The main structure 200 of the quantitative powder dispensing device includes a powder box base 220 at the top, a main shaft 210, a switching mechanism 230, a unit hopper with convertible volume 240, an outer shell 251, a bottom plate 252, an outer shell limiting structure 260, and a limiting nut 270. The powder box base 220 is provided with a feed through hole that mates with the discharge through hole, a limiting groove for fixing the detachable powder box 100, and a stop. The limiting groove for fixing the detachable powder box 100 and the limiting groove for the discharge slider 131 of the powder box cavity 120 form a movable connection mechanism. The stop is a cuboid and is located in the middle between the discharge through hole and the main shaft. It prevents the discharge slider 131 from moving and opening the discharge through hole. During installation, the stop prevents the discharge slider 131 from moving, and the compression of the spring 132 completes the opening action of the discharge port of the detachable powder box 100. During unloading, the movement restriction of the discharge slider 131 is released, and the spring 132 releases and pushes the discharge slider 131 to close the discharge port of the detachable powder box 100. The base plate 252 is provided with a discharge port. The upper end of the main shaft 210 is connected to the powder box base 220, and the lower end is restricted by the limiting nut 270 to switch the lower plate 236. The switching mechanism 230 consists of a switch rotating shaft 231, a switch main lever 232, an upper switch secondary lever 233, a lower switch secondary lever 234, a switch upper plate 235, and a switch lower plate 236, and is installed inside the housing 251. The switch rotating shaft 231 is installed inside the main shaft 210. The upper switch secondary lever 233, the switch main lever 232, and the lower switch secondary lever 234 pass through the main shaft 210 and are fixed on the switch rotating shaft 231. The switch upper plate 235 and the switch lower plate 236 pass through the main shaft 210 and are respectively connected to the upper switch secondary lever 233 and the lower switch secondary lever 234, and are respectively restricted between the powder box base 220 and the housing 251, and between the base plate 252 and the limit nut 270. The switch upper plate 235 has a switch upper plate through hole that matches the feed through hole of the powder box base 220, and the switch lower plate 236 has a switch lower plate through hole that matches the discharge port of the base plate 252. The upper surface of the upper switch plate 235 has a groove that matches the key position of the upper switch secondary lever 233, and the upper surface of the lower switch plate 236 has an arc-shaped groove with a matching angle and a radius equal to the distance from the key position of the lower switch secondary lever 234 to the main shaft. The upper switch plate 235 and the lower switch plate 236 are constrained on the main shaft 210. The switch rotation shaft 231 can be rotated by pushing the main switch lever 232, and the rotation is driven by the key positions of the upper switch secondary lever 233 and the lower switch secondary lever 234 passing through the grooves on the plate. The convertible volume unit hopper 240 is provided with a convertible powder hopper 241 and a convertible powder hopper lever 242. The convertible powder hopper 241 is installed in the corresponding cavity of the outer shell 251 and is sleeved on the main shaft 210 between the main switch lever 232 and the lower switch secondary lever 234. The convertible powder hopper 241 includes a sleeve and unit hoppers of different volumes connected to the sleeve. The convertible volume unit hopper 240 is located between the switch upper panel 235 and the base plate 252.The outer casing 251 has a rotating groove through which the convertible powder hopper lever 242 can pass and rotate, and the outer casing 251 also has a rotating groove through which the main switch lever 232 can pass and rotate. By pushing the convertible powder hopper lever 242, the convertible volume unit hopper 240 can be rotated around the main shaft 210. The outer casing limiting structure 260 consists of an outer casing limiting 261 and an outer casing limiting pin 262. The function of the main structure 200 of the quantitative powder dispensing device is to take a certain amount of release agent powder and pour it into the powder dispensing crucible.

[0038] The quantitative powder dispensing device described in the technical solution of this utility model can be fixed on the cover plate of the vibrating crucible of the automatic feeding machine for use; the cover plate has a hole that matches the size of the discharge port of the quantitative powder dispensing device.

[0039] Assembly process of the main structure 200 of the quantitative powder dispensing device:

[0040] Insert the switch rotating shaft 231 into the main shaft 210, align and install the powder box base 220, and then insert the switch secondary lever 233. Install the switch upper plate 235 according to the position of the switch secondary lever 233. Install the housing limit 261 on the main shaft 210 and insert the housing limit pin 262; install the housing 251 according to the position of the housing limit 261. Insert the switch main lever 232 from the housing 251 into the reserved slot of the switch rotating shaft 231, and push the switch main lever 232 so that the through hole of the switch upper plate 235 is coaxial with the through hole of the powder box base 220. Place the convertible powder hopper 241 on the main shaft 210 and place it in the reserved space of the housing 251; insert the convertible powder hopper lever 242 into the convertible powder hopper 241, and push the convertible powder hopper lever 242 so that one of the hoppers is aligned with the through hole of the switch upper plate 235; install the base plate 252 below the convertible powder hopper 241. Insert the secondary lever 234 of the switch into the pre-reserved position on the housing 251 and then into the switch rotating shaft 231. Aligning the secondary lever 234 with the main shaft 210, install the lower switch plate 236 onto the main shaft and rotate it so that the through hole of the lower switch plate 236 is away from the through hole of the powder box base 220. After tightening the limit nut 270 onto the switch rotating shaft 231, the main structure 200 of the quantitative powder dispensing device is assembled.

[0041] The quantitative powder dispensing device can be fixed to the cover plate of the vibrating crucible of the automatic feeding machine for use. The upper surface of the vibrating crucible cover plate is in contact with the lower surface of the switch lower plate 236, and the vibrating crucible cover plate has through holes of the same position and diameter as the bottom plate 252.

[0042] When using, wear dustproof personal protective equipment in a ventilated area or a designated powder application room to batch pack the release agent powder into removable powder boxes 100 for production use.

[0043] Before applying the powder, ensure that the through hole 235 on the switch plate is coaxial with the through hole 220 on the powder box base. Based on the amount of powder to be applied, push the convertible powder hopper lever 242 to select the appropriate powder hopper and align it with the through hole 220 on the powder box base. Then, install the detachable powder box 100 onto the powder box base 220 via the limiting slide in a unidirectional manner. The outlet of the detachable powder box 100 opens, and the release agent powder enters the convertible powder hopper 241 through the through holes 220 on the powder box base, 235 on the switch plate, and 251 on the outer shell. The quantitative collection of the release agent powder is achieved by limiting the volume.

[0044] The vibrating crucible below the quantitative powder dispensing device is activated. Under the vibration, the release agent powder falling from the removable powder box 100 fills the selected convertible powder hopper 241. The vibrating crucible cover is opened, the blank to be powdered is placed in, and the cover is closed. The main lever 232 of the switch is then pushed to its limit position. During this process, the rotation of the switch shaft 231 causes the through hole of the upper switch plate 235 to be misaligned with the through hole of the powder box base 220, thus isolating the release agent powder between the powder box cavity 120 and the convertible powder hopper 241. Then, the through hole of the lower switch plate 236 gradually becomes coaxial with the through hole of the bottom plate 252. After a few seconds, under the vibration, all the release agent powder per unit volume in the convertible powder hopper 241 falls into the vibrating crucible through the through holes of the bottom plate 252, the lower switch plate 236, and the vibrating crucible cover. Under the vibration of the crucible, the release agent powder per unit volume gradually and evenly covers the surface of the blank, completing the powder dispensing operation for the blank to be pressed. During this process, workers do not come into contact with the release agent powder, and the release agent powder is confined to a small space, preventing dust from being generated at the work site.

[0045] The amount of release agent powder in the powder box cavity 120 of the removable powder box 100 can be observed through the transparent cover 110. If the amount is insufficient, the removable powder box 100 can be removed and replaced with a removable powder box 100 filled with release agent powder.

[0046] In the secondary molding process, the quantitative powder application device is used to quantitatively control the amount of powder applied to the softened molding blank, ensuring that the blank is heated consistently in a softened state during reprocessing. At the same time, the dust risk in the working environment is effectively reduced by isolating the release agent powder from the working environment during the powder application process.

[0047] Example 2:

[0048] like Figure 9 As shown, based on Example 1, the convertible powder hopper 241 is removed, and the original location of the convertible powder hopper 241 is replaced by a through hole of a certain diameter in the outer shell 251, which can realize quantitative powder dispensing per unit amount.

[0049] Example 3:

[0050] like Figure 10As shown, based on Embodiment 1, the rotary type of the convertible powder hopper 241 is changed to a pull-out type of powder hopper 243 with different diameter through holes, and the convertible powder hopper lever 242 is changed to a powder hopper limiting pin 244 embedded in the outer shell 251.

[0051] Example 4:

[0052] like Figure 11 As shown, based on Example 3, the pull-out convertible powder hopper is replaced with several independent modules 245 with through holes of different diameters that are embedded and replaceable. When the main switch lever 232 is pushed to the limit position, i.e., the through hole of the switch upper plate 235 is misaligned with the through hole of the powder box base 220, the modules with different through hole diameters can be replaced, thus realizing the conversion of the powder hopper volume of the quantitative powder dispensing device.

[0053] The above are merely preferred embodiments of this utility model and do not limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quantitative powder dispensing device, characterized in that: It includes at least one removable powder box (100) and a main structure (200) for a quantitative powder dispensing device; the main structure (200) for the quantitative powder dispensing device can be rotated or replaced to select the appropriate volume of a convertible unit hopper (240); the main structure (200) for the quantitative powder dispensing device can control the dispensing of the convertible unit hopper (240) by pushing the main lever (232) to control the switching mechanism (230).

2. The quantitative powder dispensing device according to claim 1, characterized in that: The main structure (200) of the quantitative powder dispensing device includes a main shaft (210), a powder box base (220), a switching mechanism (230), a unit hopper (240) with convertible volume, an outer shell (251), a base plate (252), an outer shell limiting structure (260), and a limiting nut (270). The powder box base (220) and the bottom of the detachable powder box (100) are provided with a movable connection mechanism, and the powder box base (220) is provided with a feed passage that cooperates with the discharge through hole. Hole; the bottom plate (252) is provided with a discharge port; the convertible volume unit hopper (240) is provided with a convertible powder hopper (241) and a convertible powder hopper lever (242), the convertible powder hopper (241) is installed in the cavity corresponding to the outer shell (251), the convertible powder hopper lever (242) is installed in the outer shell (251) and connected to the convertible powder hopper (241); the convertible volume unit hopper (240) is provided with a hopper discharge port that cooperates with the discharge port.

3. The quantitative powder dispensing device according to claim 2, characterized in that: The switching mechanism (230) consists of a switch rotating shaft (231), a switch main lever (232), an upper switch secondary lever (233), a lower switch secondary lever (234), a switch upper plate (235), and a switch lower plate (236). The switch rotating shaft (231) is installed inside the main shaft (210). The upper switch secondary lever (233), the switch main lever (232), and the lower switch secondary lever (234) pass through the main shaft (210) and are fixed on the switch rotating shaft (231). The switch upper plate (235) and the switch lower plate (236) pass through the main shaft (210) and are connected to the upper switch secondary lever (233) and the lower switch secondary lever (234) respectively, and are respectively restricted between the powder box base (220) and the outer shell (251), and between the bottom plate (252) and the limiting nut (270).

4. The quantitative powder dispensing device according to claim 3, characterized in that: The upper end of the main shaft (210) is connected to the powder box base (220), and the lower end is fixed above the switch lower plate (236) by a limiting nut (270); the switch upper plate (235) is provided with a switch upper plate through hole that cooperates with the feed through hole of the powder box base (220), and the switch lower plate (236) is provided with a switch lower plate through hole that cooperates with the discharge port of the base plate (252).

5. The quantitative powder dispensing device according to claim 4, characterized in that: The convertible volume unit hopper (240) is located between the outer shell (251) and the bottom plate (252), including convertible powder hoppers (241) of different volumes and convertible powder hopper levers (242), which are sleeved on the main shaft (210) between the main switch lever (232) and the lower switch secondary lever (234); the convertible powder hopper (241) includes a sleeve and unit hoppers of different volumes connected to the sleeve.

6. A quantitative powder dispensing device according to any one of claims 3-5, characterized in that: The outer casing (251) is provided with a rotating groove through which the convertible powder hopper lever (242) can pass and rotate; the outer casing (251) is provided with a rotating groove through which the main switch lever (232) can pass and rotate; the upper surface of the upper switch plate (235) has a groove that matches the key position of the upper switch secondary lever (233); the upper surface of the lower switch plate (236) has an arc-shaped groove with a matching angle and a radius equal to the distance from the main shaft of the key position of the lower switch secondary lever (234); the outer casing limiting structure (260) is composed of an outer casing limiting (261) and an outer casing limiting pin (262).

7. A quantitative powder dispensing device according to any one of claims 1-5, characterized in that: The removable powder box (100) includes a cover plate (110) and a powder box cavity (120); the powder box cavity (120) is provided with a ramp inclined to the discharge through hole; the bottom of the removable powder box (100) is provided with a discharge through hole and an opening and closing device, the opening and closing device including a discharge slider (131) and a spring (132); the discharge slider (131), the spring (132) and the discharge through hole are located at the bottom of the powder box cavity (120).

8. The quantitative powder dispensing device according to claim 7, characterized in that: The cover plate (110) is made of transparent material and has a sealing structure between it and the powder box cavity (120); the bottom surface of the powder box cavity (120) is provided with a groove facing the discharge through hole; the discharge slider (131) is set in the groove and connected to the spring (132); when the spring (132) is in a non-compressed state, the discharge slider (131) is in the position of closing the discharge through hole.

9. A quantitative powder dispensing device according to any one of claims 2-5, characterized in that: The movable connection mechanism is a unidirectional sliding track; the sliding track includes a limiting groove for the discharge slider (131) at the bottom of the detachable powder box (100) and a limiting groove for fixing the detachable powder box (100) at the top of the powder box base (220); the powder box base (220) is provided with a stop block to prevent the discharge slider (131) from moving and opening the discharge through hole; the stop block is a cuboid and is located in the middle of the discharge through hole and the main shaft.

10. A quantitative powder dispensing device according to any one of claims 1-5 and 8, characterized in that: The quantitative powder dispensing device can be installed on the vibrating crucible of the automatic feeding machine and used in conjunction with the automatic feeding machine.

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