CN116214860A - Injection molding equipment of wear-resisting earphone shell - Google Patents

Abstract

The invention relates to the technical field of earphone production, in particular to injection molding equipment for a wear-resistant earphone shell. The invention provides an injection molding device of a wear-resistant earphone shell, which can adjust the temperature of a feed cylinder and slow down the falling speed of a molten material. The utility model provides an injection moulding equipment of wear-resisting earphone shell, including fuselage, hopper, first cylinder, fixed box, discharging pipe and feed cylinder etc. the hopper is installed to fuselage upper portion front side, and first cylinder is installed to fuselage upper portion rear side, and the feed cylinder is installed to the telescopic link bottom of first cylinder, and the hopper passes through coupling hose UNICOM with the feed cylinder, and the feed cylinder lower part is connected with fixed box, and fixed box lower part is connected with the discharging pipe. Through the circulation of heat in the circulation trachea, can be with the temperature regulation of feed cylinder to suitable temperature, do benefit to the complete melting of plastics, so can avoid incomplete molten plastic granules by injection moulding, improve the quality of earphone shell.

Description

Injection molding equipment of wear-resisting earphone shell

Technical Field

The invention relates to the technical field of earphone production, in particular to injection molding equipment for a wear-resistant earphone shell.

Background

The earphone shell is generally made of plastic, when the earphone shell is manufactured, an injection molding machine is generally used for manufacturing, when the earphone shell is manufactured, a proper fixed mold is selected according to the shape of the earphone shell, the fixed mold is placed under the movable mold, the movable mold is attached to the fixed mold, then plastic is placed into a hopper and heated, the plastic is melted, then molten material enters between the movable mold and the fixed mold through a charging barrel, then the injection molded molten material is cooled and molded, then the fixed mold and the movable mold are separated, and the molded earphone shell is taken away. However, in the process of producing the earphone shell, the melting material is too low in temperature or too fast in falling, so that the plastic is not completely melted, and the incompletely melted plastic is subjected to injection molding to enable white spots to appear on the earphone shell product, so that the quality of the earphone shell is affected.

Patent publication number is CN 108501312A's patent, an injection molding machine is used in earphone production, including the injection molding machine body, be equipped with on the injection molding machine body and prevent plugging device, the inside earphone shell discharging device that is provided with of injection molding machine body, prevent plugging device is including setting up the feed cylinder of injection molding machine body upper surface, the upper surface of feed cylinder is equipped with a plurality of and is annular equidistant recess of arranging, earphone shell discharging device is including setting up the inside section of thick bamboo that holds of injection molding machine body, the inside of holding the section of thick bamboo is equipped with the cavity.

Above-mentioned patent can not adjust the temperature of feed cylinder at the in-process of producing earphone shell, and can not slow down the speed that the melt dropped, leads to earphone shell product to have the condition of white point, reduces the quality of earphone shell, consequently, need to develop an injection moulding equipment that can adjust feed cylinder temperature and can slow down the wear-resisting earphone shell of melt whereabouts speed to avoid appearing the white point on the earphone shell product, improve earphone shell quality.

Disclosure of Invention

In order to overcome the defects that the temperature of a charging barrel cannot be regulated and the falling speed of the molten material cannot be slowed down in the prior art, the invention provides the injection molding equipment of the wear-resistant earphone shell, which can regulate the temperature of the charging barrel and can slow down the falling speed of the molten material.

The utility model provides an injection moulding equipment of wear-resisting earphone shell, including the fuselage, the hopper, first cylinder, fixed box, discharging pipe and feed cylinder, the hopper is installed to fuselage upper portion front side, first cylinder is installed to fuselage upper portion rear side, the feed cylinder is installed to the telescopic link bottom of first cylinder, the hopper passes through coupling hose UNICOM with the feed cylinder, feed cylinder lower part is connected with fixed box, fixed box lower part is connected with the discharging pipe, still including forming assembly, temperature regulating mechanism and reducing mechanism, be equipped with on the discharging pipe and be used for carrying out fashioned forming assembly to the melt after the plastics melts, be equipped with on the feed cylinder and be used for carrying out the temperature regulating mechanism who adjusts to the temperature of feed cylinder, be equipped with the reducing mechanism who is used for slowing down the melt whereabouts speed in the fixed box.

Optionally, the forming assembly comprises a movable die and a fixed die, the movable die is arranged at the bottom of the discharging pipe, the fixed die is arranged in the middle of the machine body, and the fixed die is located under the movable die.

Optionally, the temperature adjusting mechanism comprises a blower and a circulating air pipe, the blower is arranged on the left side and the right side of the upper portion of the machine body, the circulating air pipe is wound on the outer wall of the charging barrel, and the blower is communicated with the circulating air pipe.

Optionally, the reducing mechanism is including gear wheel, pinion, motor and fixed block, and the motor is installed on roof right side in the fixed box, and the output shaft lower part and the fixed box rotation of motor are connected with the pinion on the output shaft of motor, and the rotary type is connected with the gear wheel between feed cylinder bottom and the discharging pipe top, gear wheel and pinion meshing, and the fixed block is installed to the upper left side of discharging pipe inner wall, and it has the weeping mouth to open on the gear wheel, and the fixed block is located the gear wheel and leaks the material mouth under the mouth, and the fixed block plugs up the weeping mouth on the gear wheel.

Optionally, the device further comprises a heat preservation mechanism for preserving heat of the charging barrel, the heat preservation mechanism comprises a heat preservation sleeve, a moving plate and a ventilation plate, the ventilation plate is arranged on the front side of the charging barrel, the ventilation plate is connected with the moving plate in a sliding mode, the heat preservation sleeve is sleeved outside the charging barrel, the moving plate and the ventilation plate are both located inside the heat preservation sleeve, and the moving plate is connected with the heat preservation sleeve in a sliding mode.

Optionally, lubrication mechanism that still is used for lubricating gear wheel and pinion is including the oil tank, go out oil pipe, shifting block and rotating block, the oil tank is installed on fixed box top right side, the oil tank left side downside is connected with out oil pipe, go out oil pipe and oil tank UNICOM, go out oil pipe and pass fixed box inner roof, go out the oil-out of oil pipe towards the meshing department of gear wheel and pinion, go out the inside downside rotation of oil pipe and be connected with the rotating block, the rotating block blocks up out oil pipe, be connected with the shifting block on the output shaft of motor, shifting block and rotating block lower part contact.

Optionally, the cooling and forming dehumidifying mechanism for accelerating the melting stock is further included, the dehumidifying mechanism comprises a second air cylinder, air cylinders and a flaring pipe, the second air cylinder is installed on the rear side of the lower portion of the machine body, a plurality of air cylinders are installed on the rear side of the middle portion of the machine body, the air cylinders are transversely arranged in parallel, piston rods of the air cylinders are connected with telescopic rods of the second air cylinder, the front sides of the air cylinders are connected with the flaring pipes, the flaring pipes are communicated with the air cylinders, and the flaring pipes face towards the fixed die.

Optionally, still including being used for carrying out the clearance mechanism of clearing up to fuselage inner bottom wall residual plastics and melt, clearance mechanism is connected with the connecting rod including connecting rod and cleaning piece on the telescopic link of second cylinder, and cleaning piece is installed to the connecting rod lower part, cleaning piece and fuselage inner bottom wall contact.

The invention has the following advantages:

1. the temperature of the charging barrel can be adjusted to a proper temperature by circulating heat in the circulating air pipe, so that complete melting of plastics is facilitated, plastic particles which are not completely melted can be prevented from being injection molded, and the quality of the earphone shell is improved;

2. the fixed block is used for intermittently intercepting the molten material, so that the falling speed of the molten material can be slowed down, the complete melting of plastics is further facilitated, and the quality of the earphone shell is further improved;

3. when the movable plate shields the ventilation plate, the movable plate and the heat preservation sleeve can preserve heat of the charging barrel, so that the temperature regulation effect of the charging barrel is enhanced;

4. the lubricating oil intermittently drops from the oil outlet pipe to the meshing position of the large gear and the small gear, so that the large gear and the small gear can be lubricated, the large gear and the small gear are prevented from being corroded, and the service lives of the large gear and the small gear are prolonged;

5. the gas is blown to the molten material between the movable die and the fixed die from the flaring pipe, so that the cooling molding of the molten material can be accelerated, and the production efficiency of the earphone shell is improved;

6. the cleaning block can repeatedly move back and forth, so that residual plastics and molten materials on the inner bottom wall of the machine body can be cleaned, the influence on the production operation of the earphone shell caused by accumulation of the residual plastics and the molten materials is avoided, and the production of the earphone shell is facilitated, and a clean operation environment is provided.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial perspective sectional view of the present invention.

Fig. 3 is a schematic perspective view of a temperature adjusting mechanism of the present invention.

Fig. 4 is a schematic perspective view of a speed reducing mechanism according to the present invention.

Fig. 5 is a perspective sectional view of the reduction mechanism of the present invention.

Fig. 6 is a schematic view of a first perspective structure of the thermal insulation mechanism of the present invention.

Fig. 7 is a schematic view of a second perspective view of the thermal insulation mechanism according to the present invention.

Fig. 8 is a schematic perspective view of a lubrication mechanism according to the present invention.

Fig. 9 is a partial perspective sectional view of the lubrication mechanism of the present invention.

Fig. 10 is a schematic perspective view of a dehumidifying mechanism according to the present invention.

Fig. 11 is a schematic perspective view of a first perspective view of the cleaning mechanism according to the present invention.

Fig. 12 is a schematic perspective view of a second perspective view of the cleaning mechanism of the present invention.

Meaning of reference numerals in the drawings: 1: fuselage, 2: hopper, 3: first cylinder, 4: moving die, 41: fixed box, 42: discharge tube, 43: cartridge, 44: fixed die, 5: temperature adjusting mechanism, 51: blower, 52: circulation trachea, 6: speed reduction mechanism, 61: large gear, 62: pinion, 63: motor, 64: fixed block, 7: thermal insulation mechanism, 71: insulation cover, 72: a moving plate, 73: ventilation plate, 8: lubrication mechanism, 81: oil tank, 82: oil outlet pipe, 83: a dial block, 84: rotating block, 9: dehumidification mechanism, 91: second cylinder, 92: inflator, 93: flaring tube, 10: cleaning mechanism, 101: connecting rod, 102: a cleaning block.

Detailed Description

Reference herein to an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Example 1

The utility model provides an injection moulding equipment of wear-resisting earphone shell, as shown in fig. 1 and 2, including fuselage 1, hopper 2, first cylinder 3, movable mould 4, fixed box 41, discharging pipe 42, feed cylinder 43, cover half 44, temperature regulating mechanism 5 and reduction gears 6, hopper 2 welds in fuselage 1 upper portion front side, first cylinder 3 installs in fuselage 1 upper portion rear side, the telescopic link bottom rigid coupling of first cylinder 3 has feed cylinder 43, hopper 2 and feed cylinder 43 pass through the coupling hose UNICOM, fixed box 41 has been welded to feed cylinder 43 lower part, fixed box 41 welding has discharging pipe 42, the bottom rigid coupling of discharging pipe 42 has movable mould 4, cover half 44 is placed in fuselage 1 middle part, cover half 44 is located under the movable mould 4, be equipped with temperature regulating mechanism 5 on the feed cylinder 43, temperature regulating mechanism 5 is used for adjusting the temperature of feed cylinder 43, be equipped with reduction gears 6 in the fixed box 41, reduction gears 6 are used for slowing down the melt whereabouts.

As shown in fig. 1, 2 and 3, the temperature adjusting mechanism 5 includes two blowers 51 and a circulation air pipe 52, the two blowers 51 are respectively installed on the left and right sides of the upper portion of the machine body 1, the circulation air pipe 52 is wound on the outer wall of the charging barrel 43, and the blowers 51 are all communicated with the circulation air pipe 52.

As shown in fig. 2, 4 and 5, the speed reducing mechanism 6 comprises a large gear 61, a small gear 62, a motor 63 and a fixed block 64, the motor 63 is mounted on the right side of the inner top wall of the fixed box 41, the lower part of the output shaft of the motor 63 is rotationally connected with the fixed box 41, the small gear 62 is welded on the output shaft of the motor 63, the large gear 61 is rotationally connected between the bottom of the charging barrel 43 and the top of the discharging pipe 42, the large gear 61 is meshed with the small gear 62, the fixed block 64 is welded on the left upper side of the inner wall of the discharging pipe 42, a material leakage opening is formed in the large gear 61, the fixed block 64 is positioned under the material leakage opening on the large gear 61, and the material leakage opening on the large gear 61 is blocked by the fixed block 64.

When the wear-resistant earphone shell is used for producing an earphone shell by using the injection molding equipment, the first air cylinder 3 is started, the telescopic rod of the first air cylinder 3 extends through the feed cylinder 43, the fixed box 41 and the discharge pipe 42 to enable the movable mould 4 to move downwards to be attached to the fixed mould 44, then plastic is put into the hopper 2, the machine body 1 is started, the machine body 1 is operated to heat the plastic to enable the plastic to be melted into velvet materials, then the melt enters between the fixed mould 44 and the movable mould 4 through the feed cylinder 43, the fixed box 41 and the discharge pipe 42, thus the injection molding of the earphone shell can be completed, when the melt passes through the feed cylinder 43, the air blowers 51 are started, the air blowers 51 are operated to input heat into the circulating air pipe 52, the temperature of the feed cylinder 43 can be adjusted to a proper temperature through the heat in the circulating air pipe 52, and the complete melting of the plastic is facilitated, when the molten material falls, the motor 63 is started, the motor 63 operates to drive the pinion 62 to rotate, thereby driving the bull gear 61 to rotate, and further, the discharge hole on the bull gear 61 corresponds to the fixed block 64, the molten material intermittently falls from the discharge hole of the bull gear 61 through the continuous rotation of the fixed block 64, the molten material intermittently falls from the discharge hole of the bull gear 61, the molten material can be intermittently trapped, the falling speed of the molten material can be slowed down, the complete melting of plastics is facilitated, the particles which are not completely melted are prevented from being injection molded, the quality of a earphone shell is improved, the injection molded molten material is then cooled and molded, the fixed die 44 and the movable die 4 are then separated through the first cylinder 3, the fixed die 44 and the molded earphone shell are taken away, and then the first cylinder 3, the motor 63 and the machine body 1 are closed.

Example 2

On the basis of embodiment 1, as shown in fig. 1, 2, 6 and 7, the device further comprises a heat preservation mechanism 7, wherein the heat preservation mechanism 7 comprises a heat preservation sleeve 71, a moving plate 72 and a ventilation plate 73, the ventilation plate 73 is welded on the front side of the charging barrel 43, the moving plate 72 is connected to the ventilation plate 73 in a sliding mode, the heat preservation sleeve 71 is sleeved outside the charging barrel 43, the moving plate 72 and the ventilation plate 73 are both positioned inside the heat preservation sleeve 71, and the moving plate 72 is connected with the heat preservation sleeve 71 in a sliding mode.

When the temperature of the charging barrel 43 is regulated, the moving plate 72 is pulled rightwards, so that the moving plate 72 shields the ventilation plate 73, the charging barrel 43 can be insulated through the moving plate 72 and the insulation sleeve 71, the temperature regulation effect of the charging barrel 43 is enhanced, when the excessive heat on the charging barrel 43 needs to be released, the moving plate 72 is opened, and the excessive heat on the charging barrel 43 can be dissipated through the ventilation plate 73.

As shown in fig. 1, fig. 2, fig. 8 and fig. 9, the lubricating mechanism 8 further comprises a lubricating mechanism 8, the lubricating mechanism 8 comprises an oil tank 81, an oil outlet pipe 82, a shifting block 83 and a rotating block 84, the oil tank 81 is arranged on the right side of the top of the fixed box 41, the oil outlet pipe 82 is fixedly connected with the left lower side of the oil tank 81, the oil outlet pipe 82 is communicated with the oil tank 81, the oil outlet pipe 82 penetrates through the inner top wall of the fixed box 41, the oil outlet of the oil outlet pipe 82 faces the meshing position of the large gear 61 and the small gear 62, the rotating block 84 is rotatably connected to the lower side of the inner part of the oil outlet pipe 82, the rotating block 84 blocks the oil outlet pipe 82, the shifting block 83 is welded on the output shaft of the motor 63, and the shifting block 83 is in contact with the lower part of the rotating block 84.

The rotation of the output shaft of the motor 63 drives the shifting block 83 to rotate, and the shifting block 83 rotates to intermittently impact the rotating block 84, so that the rotating block 84 is intermittently opened, and lubricating oil intermittently drops from the oil outlet pipe 82 to the meshing position of the large gear 61 and the small gear 62, so that the large gear 61 and the small gear 62 can be lubricated, and the service lives of the large gear 61 and the small gear 62 are prolonged.

As shown in fig. 1, 2 and 9, the air dehumidifying device further comprises a dehumidifying mechanism 9, the dehumidifying mechanism 9 comprises a second air cylinder 91, air cylinders 92 and a flaring pipe 93, the second air cylinder 91 is installed on the rear side of the lower portion of the machine body 1, four air cylinders 92 are fixedly connected to the rear side of the middle portion of the machine body 1, the four air cylinders 92 are transversely arranged in parallel, piston rods of the air cylinders 92 are connected with telescopic rods of the second air cylinder 91, flaring pipes 93 are fixedly connected to the front sides of the air cylinders 92, the flaring pipes 93 are communicated with the air cylinders 92, and the flaring pipes 93 face the fixed die 44.

When the molten material enters between the movable die 4 and the fixed die 44, the second air cylinder 91 is started, the telescopic rod of the second air cylinder 91 is controlled to repeatedly stretch and retract, so that the piston rod of the air cylinder 92 is repeatedly pushed and pulled, the air cylinder 92 can be used for pumping, gas is blown to the molten material between the movable die 4 and the fixed die 44 from the flaring pipe 93, the cooling forming of the molten material is facilitated, the production efficiency of the earphone shell is improved, and when the earphone shell is produced, the second air cylinder 91 is closed.

As shown in fig. 1, 2, 11 and 12, the cleaning device further comprises a cleaning mechanism 10, the cleaning mechanism 10 comprises a connecting rod 101 and a cleaning block 102, the connecting rod 101 is fixedly connected to the telescopic rod of the second cylinder 91, the cleaning block 102 is fixedly connected to the lower portion of the connecting rod 101, and the cleaning block 102 is in contact with the inner bottom wall of the machine body 1.

In the process of producing the earphone shell, partial plastics and molten materials possibly fall to the inner bottom wall of the earphone shell 1, and the telescopic rod of the second air cylinder 91 repeatedly stretches and contracts to drive the cleaning block 102 to repeatedly move back and forth through the connecting rod 101, so that residual plastics and molten materials on the inner bottom wall of the earphone shell 1 can be cleaned, and the influence of residual plastics and molten materials accumulation on the production operation of the earphone shell is avoided.

While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the invention as defined in the following claims. Accordingly, the detailed description of the disclosed embodiments is to be taken only by way of illustration and not by way of limitation, and the scope of protection is defined by the content of the claims.

Claims (8)

1. The utility model provides an injection moulding equipment of wear-resisting earphone shell, including fuselage (1), hopper (2), first cylinder (3), fixed box (41), discharging pipe (42) and feed cylinder (43), hopper (2) are installed to fuselage (1) upper portion front side, first cylinder (3) are installed to fuselage (1) upper portion rear side, feed cylinder (43) are installed to telescopic link bottom of first cylinder (3), hopper (2) and feed cylinder (43) are through coupling hose UNICOM, feed cylinder (43) lower part connection has fixed box (41), fixed box (41) lower part is connected with discharging pipe (42), characterized by: the plastic melting furnace further comprises a forming assembly, a temperature adjusting mechanism (5) and a reducing mechanism (6), wherein the forming assembly for forming the molten material after plastic melting is arranged on the discharging pipe (42), the temperature adjusting mechanism (5) for adjusting the temperature of the charging barrel (43) is arranged on the charging barrel (43), and the reducing mechanism (6) for reducing the falling speed of the molten material is arranged in the fixed box (41).

2. An injection molding apparatus for a wear resistant earphone shell as recited in claim 1, wherein: the molding assembly comprises a movable die (4) and a fixed die (44), the movable die (4) is arranged at the bottom of the discharging pipe (42), the fixed die (44) is arranged in the middle of the machine body (1), and the fixed die (44) is located under the movable die (4).

3. An injection molding apparatus for a wear resistant earphone shell as recited in claim 2, wherein: the temperature adjusting mechanism (5) comprises a blower (51) and a circulating air pipe (52), the blower (51) is arranged on the left side and the right side of the upper portion of the machine body (1), the circulating air pipe (52) is wound on the outer wall of the charging barrel (43), and the blower (51) is communicated with the circulating air pipe (52).

4. An injection molding apparatus for a wear resistant earphone shell as recited in claim 3, wherein: the speed reducing mechanism (6) comprises a large gear (61), a pinion (62), a motor (63) and a fixed block (64), the motor (63) is installed on the right side of the inner top wall of the fixed box (41), the lower portion of an output shaft of the motor (63) is rotationally connected with the fixed box (41), the pinion (62) is connected to the output shaft of the motor (63), the large gear (61) is rotationally connected between the bottom of the charging barrel (43) and the top of the discharging pipe (42), the large gear (61) is meshed with the pinion (62), the fixed block (64) is installed on the left upper side of the inner wall of the discharging pipe (42), a material leakage opening is formed in the large gear (61), the fixed block (64) is located right below the material leakage opening in the large gear (61), and the material leakage opening in the large gear (61) is blocked by the fixed block (64).

5. An injection molding apparatus for a wear resistant earphone shell as recited in claim 4, wherein: the novel thermal insulation device is characterized by further comprising a thermal insulation mechanism (7) for insulating the charging barrel (43), wherein the thermal insulation mechanism (7) comprises a thermal insulation sleeve (71), a moving plate (72) and a ventilation plate (73), the ventilation plate (73) is arranged on the front side of the charging barrel (43), the moving plate (72) is connected onto the ventilation plate (73) in a sliding mode, the thermal insulation sleeve (71) is sleeved outside the charging barrel (43), the moving plate (72) and the ventilation plate (73) are both positioned inside the thermal insulation sleeve (71), and the moving plate (72) is connected with the thermal insulation sleeve (71) in a sliding mode.

6. An injection molding apparatus for a wear resistant earphone shell as recited in claim 5, wherein: the lubricating mechanism (8) is used for lubricating the large gear (61) and the small gear (62), the lubricating mechanism (8) comprises an oil tank (81), an oil outlet pipe (82), a shifting block (83) and a rotating block (84), the oil tank (81) is installed on the right side of the top of the fixed box (41), the oil outlet pipe (82) is connected with the oil outlet pipe (82) on the left lower side of the oil tank (81), the oil outlet pipe (82) is communicated with the oil tank (81), the oil outlet pipe (82) penetrates through the inner top wall of the fixed box (41), the oil outlet of the oil outlet pipe (82) faces the meshing position of the large gear (61) and the small gear (62), the rotating block (84) is connected to the lower side inside the oil outlet pipe (82) in a rotating mode, the shifting block (83) is connected to the output shaft of the motor (63), and the shifting block (83) is in contact with the lower portion of the rotating block (84).

7. An injection molding apparatus for a wear resistant earphone shell as recited in claim 6, wherein: the cooling and forming device is characterized by further comprising a dehumidifying mechanism (9) for accelerating cooling and forming of molten materials, wherein the dehumidifying mechanism (9) comprises a second air cylinder (91), an air cylinder (92) and a flaring pipe (93), the second air cylinder (91) is installed on the rear side of the lower portion of the machine body (1), a plurality of air cylinders (92) are installed on the rear side of the middle portion of the machine body (1), the air cylinders (92) are transversely arranged in parallel, piston rods of the air cylinders (92) are connected with telescopic rods of the second air cylinder (91), the front sides of the air cylinders (92) are connected with the flaring pipes (93), the flaring pipes (93) are communicated with the air cylinders (92), and the flaring pipes (93) are all oriented to a fixed die (44).

8. An injection molding apparatus for a wear resistant earphone shell as recited in claim 7, wherein: the cleaning mechanism (10) is used for cleaning residual plastics and molten materials on the inner bottom wall of the machine body (1), the cleaning mechanism (10) comprises a connecting rod (101) and a cleaning block (102), the connecting rod (101) is connected to the telescopic rod of the second cylinder (91), the cleaning block (102) is installed on the lower portion of the connecting rod (101), and the cleaning block (102) is in contact with the inner bottom wall of the machine body (1).

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