Grinding machine for refining liquid material

An improved beads grinding machine for liquid material comprises a cylinder having a neck portion connected to an upper housing a transmission shaft mounted in the housing by means of two bearings, a plurality of blades secured onto the transmission shaft which extends into the cylinder, a cooling chamber around the cylinder, a sleeve secured onto the transmission shaft at the portion corresponding to the neck portion, a refined liquid material chamber between the neck portion and the sleeve, an inner ring fastened onto an inner end of the sleeve, an outer ring fastened onto an end plate which is fastened onto an inner portion of the neck portion, and a lubricant seal mounted on the transmission shaft in the vicinity of one of the bearings, said inner and outer rings being adjustable.

FIELD OF THE INVENTION 
This invention relates to an improved beads grinding machine for liquid 
material and, more particularly, to one wherein a gap between a grinding 
cylinder and a collection chamber is adjustable. 
BACKGROUND OF THE INVENTION 
Conventionally, the most relevant art of the preferred embodiments of this 
invention is shown in FIGS. 1, 2, 3 and 4. As shown, the prior art 
comprises a lower housing 51, a motor 2 mounted in the lower housing 51, a 
lower belt wheel 5 mounted on the driving shaft of the motor 2, an upper 
housing 52 right above the lower housing 51, particularly right above the 
position where the motor 2 is mounted, a transmission shaft 8 mounted 
partially in the upper housing 52 by means of two bearings 20, an upper 
belt wheel 7 mounted on one end of the transmission shaft 8, a 
transmission belt 6 connecting the upper belt wheel 7 and the lower belt 
wheel 5, a cylinder 1 having a neck portion 22 at one end, the cylinder 1 
being fixed onto one end of the upper housing 52 with the neck portion 22, 
a cylindrical cooling chamber 16 mounted on the inner wall of the cylinder 
1, a plurality of cooling compartments 16a, 16b, 16c, 16d, 16e and 16f 
provided in the cylindrical cooling chamber 16, a water inlet 13 provided 
on the outer end of the cylinder 1, a water outlet 17 on the inner end of 
the cylinder 1, a refined liquid material chamber 11 in the neck portion 
22, a refined liquid material outlet 12 provided on the lower portion of 
the refined liquid material chamber 11, a lubricant seal 21 mounted onto 
the outer end of the neck portion 22 to define one wall of the refined 
liquid material chamber 11, a gap 10 between the inner end wall of the 
neck portion 22 and the transmission shaft 8 which extends outside of the 
upper housing 52, a plurality of blades 9 mounted on the outer end of the 
transmission shaft 8 which extends inside of the cylinder 1, a pump 3 
mounted opposite to the motor 2 in the lower housing 51, a liquid material 
inlet 4 connecting the pump 3 and the cylinder 1, a plurality of glass 
beads 19 provided inside of the cylinder 1, a liquid material supplying 
tank (not given a reference number), a refined liquid material collecting 
tank (not given a reference number) and a power supply (not given a 
reference number) connected to the pump 3 and the motor 2. 
According to the above disclosed prior art, the liquid material such as 
paint, ink, dying material, medicine, etc., is driven by the pump 3 
through the liquid material inlet 4 into the cylinder 1 and simultaneously 
the motor 2 rotates the lower belt wheel 5. Further, the upper belt wheel 
7 driven by the transmission belt 6 will rotate the transmission shaft 8. 
The blades 9 rotation will force the glass beads 19 to grind the liquid 
material. The refined liquid material will flow through the gap 10 into 
the refined liquid material chamber 11 and further flow out of the refined 
liquid material outlet 12 into the liquid material collecting tank. 
Simultaneously, the cooling water flows through the water inlet 13 into 
the cooling compartments 16a, 16b, 16c, 16d, 16e and 16f and further flows 
out of the water outlet 17 to prevent high temperature caused by the 
grinding effect from affecting the quality of the liquid material. 
However, the above disclosed prior art bears the following defects: 
(1) FIG. 3 shows an enlarged view of the area identified in FIG. 2 by 
reference character B between the end wall of the neck portion 22 and the 
transmission shaft 8. FIG. 4 is a front view of FIG. 3. As shown in FIGS. 
3 and 4, an eccentric misalignment between the shaft 8 and the gap 10 
caused during manufacturing or assembly will cause any glass beads 19 
entering a larger clearance of the gap to be ground into power at a 
smaller clearance of the gap. The undesired powdered glass beads will mix 
with the refined liquid material and lower the quality of the refined 
liquid material at the outlet 12. 
(2) As shown in FIG. 2, the lubricant seal 21 of the prior art is in 
contact with the transmission shaft 8. The abrasion thus caused is great. 
The lubricant seal 21 must be reviewed frequently. Otherwise, the 
lubricant will leak into the refined liquid material to spoil the quality. 
(3) As shown in FIG. 2, the cooling chamber 16 is further divided into a 
plurality of cooling compartments. Thus, each cooling compartment, in 
turn, is required to be filled up with water before the water is allowed 
to flow into the next cooling compartment. This causes the cooling water 
to linger, and to mix with the heated water. As a result, the heat can not 
be effectively cooled down. 
OBJECTS OF THE INVENTION 
To obviate the above defects of the prior art, one object of this invention 
is to provide a preferred embodiment wherein the aforementioned gap 
between the cylinder and the chamber is adjustable so that the glass beads 
will not be ground into powder and the worn out glass beads in the 
cylinder will flow out with the refined liquid material. 
Another object of this invention is to provide a preferred embodiment 
wherein the outer bearing is separated from the refined liquid material 
tank as a result of which the lubricant will not leak into the refined 
liquid material tank and the lubricant will not mix with the refined 
liquid material. 
Still another object of this invention is to provide a preferred embodiment 
wherein a spiral guiding board is further provided to each cooling 
compartment so that the heat caused by grinding will be effectively 
lowered. 
A further object of this invention is to provide a preferred embodiment 
wherein the blades are further provided with centrifugal guiding grooves 
for the glass beads to increase the rate of friction. 
A further object of this invention is to provide a preferred embodiment 
wherein a centrifugal blade is mounted on the transmission shaft in 
vicinity of the outer end wall of the refined liquid material chamber to 
centrifugally propel the refined liquid material so that the pressure 
between the transmission shaft and the outer end wall of the refined 
liquid material chamber is lowered to keep the refined liquid material 
from leaking between the transmission shaft and the outer end of the 
refined liquid material chamber. 
A further object of this invention is to provide a preferred embodiment 
wherein a female notch shaped lubricant seal is pressed by a male notch 
shaped ring onto the transmission shaft, the male notch shaped ring being 
screwed onto the transmission shaft in a direction opposite to the rotary 
direction of the transmission shaft so that the transmission shaft in 
rotation will press tight against the lubricant seal. 
SUMMARY OF THE INVENTION 
This invention relates to an improved beads grinding machine for liquid 
material wherein each cooling compartment is provided with a spiral 
guiding board; each blade is provided with a guiding groove; the gap for 
the glass beads to distill out is adjustable; the lubricant seal is 
provided outside of the refined liquid material chamber; a centrifugal 
blade is mounted on the transmission shaft in the refined liquid material 
chamber; and the lubricant seal in female notch shape is pressed by a male 
notch shaped ring onto the transmission shaft. 
Other objects, merits and a further understanding of the present invention 
will be obtained by those having ordinary skill in the art when the 
following detailed description of the best mode contemplated for 
practicing the invention is read in conjunction with accompanying drawings 
wherein like numerals refer to like or similar parts:

DETAILED DESCRIPTION OF THE PREFERRED EXEMPLARY EMBODIMENT 
This invention relates to an improved beads grinding machine for liquid 
material, more particularly to one wherein the gap for the beads to distil 
out is adjustable. 
This invention is an improvement on the machine depicted in the area 
denoted by reference character A in FIG. 2. As shown in FIGS. 6-10, a 
preferred embodiment of the present invention comprises an end plate 18a 
between a cylinder 1a and a refined liquid material chamber 11a. The 
refined liquid material chamber 11a is defined by a neck portion 22a and a 
sleeve 33a (see FIG. 13). The end plate 18a is fastened by means of at 
least three adjustment screws 31a onto one end of the neck portion 22a in 
contact with the cylinder 1a. The radial inward portion of the end plate 
18a in relation to a transmission shaft 8a has a slot (not given a 
reference number) to allow an outer ring 30a to insert therein and screw 
onto the end plate 18a by means of screws 32a. The outer ring 30a has a 
slope portion at the side facing the refined liquid material chamber 11a. 
The sleeve 33a has a circular flange 34a at one end thereof in contact 
with the cylinder 1a. An inner ring 35a is mounted onto the circular 
flange 34a. The inner ring 35a is provided with at least three conical 
threaded holes 36a. Correspondingly, the sleeve 33a is provided with at 
least three conical threaded holes 36a. Each conical threaded hole 36a and 
a corresponding conical threaded hole 36a constitute a screw hole for an 
adjustment screw 37a to screw therein. Further by means of a dial 
indicator, the adjustment screws 37a adjust the inner ring 35a so that the 
center of the inner ring 35a and that of the outer ring 30a become one. As 
shown in FIG. 8, the inner ring 35a may be fixed by the fastening screws 
38a to maintain the equal distance between the inner ring 35a and the 
outer ring 30a. As shown in FIGS. 9 and 10, the worn out glass beads which 
are smaller in diameter than the distance or gap between the inner ring 
35a and the outer ring 30a will distill out smoothly. Since the outer ring 
30a has a slope portion facing the refined liquid material chamber 11 a, 
the length of gap for the glass beads to pass through is shortened. As a 
result, the glass beads will not be ground during distillation and 
therefore the quality of the refined liquid material will not be spoiled. 
The distilled worn out glass beads may be further screened after flowing 
out with the refined liquid material. 
As shown in FIG. 7, one bearing 20a is separated from an outer end wall 23a 
of the neck portion 22a, thus defining a space 40a. A lubricant outlet 42a 
is provided below the space 40a. Between the outer end wall 23a and the 
transmission shaft 8a there is provided a lubricant seal 41a. The 
lubricant seal 41a which appears in a female notch shape is pressed by a 
male notch shaped ring 54a which is pressed by a centrifugal blade 53a and 
the sleeve 33a in turn, said sleeve 33a being screwed onto the 
transmission shaft 8a in a direction opposite to the rotary direction of 
the transmission shaft 8a. The transmission shaft 8a in rotation will 
press tight against the lubricant seal 41a. 
Further as shown in FIG. 7 a plurality of spiral guiding boards 43a are 
provided in a cooling chamber 14a. A water inlet 13a and a water outlet 
17a are provided on the cylinder 1a. The water in low temperature flows 
from the water inlet 13a into the cooling chamber 14a where the water is 
guided forward by the spiral guiding board 43a. The heat caused by the 
operation of the blades 9a is cooled down by the water flowing through the 
cooling chamber 14a. The water thus heated flows out through the water 
outlet 17a. 
As shown in FIGS. 6, 7, 11 and 12, each blade 9a is provided with a guiding 
groove 44a to increase the rate of friction for the glass beads. A 
centrifugal blade 53a is mounted on the transmission shaft 8a in the 
vicinity of the outer end wall 23a of the neck portion 22a to 
centrifugally propel the refined liquid material so that the pressure 
between the transmission shaft 8a and the outer end wall 23a is lowered to 
keep the refined liquid material from leaking between the transmission 
shaft 8a and the outer end wall 23a. 
It is to be noted that the above description attempts to explain however 
not to limit the concept of this invention.