Centrifugal Molding Method for Hollow Ceramic Chopsticks

Abstract

Centrifugal forming manufacturing method for hollow ceramic chopsticks. The mold sleeve is inclined and set on the turntable, then the mold is placed inside the mold sleeve. Next, the liquid ceramic raw material is injected into the mold. The turntable, mold sleeve and mold are driven to rotate by the motor, so that the liquid ceramic raw material in the mold forms a hollow structure under the action of centrifugal force. After the ceramic raw material in the mold solidifies into a solid state, the mold is opened and the solid hollow ceramic chopsticks are taken out. The hollow ceramic chopsticks manufactured by the present invention save consumables and costs, are lighter in weight, hygienic, beautiful and easy to clean, and have excellent practical value and usability.

Description

Technical Field

[0001] The present invention relates to a forming method of hollow chopsticks, and particularly to a centrifugal forming method of hollow ceramic chopsticks. Background Art

[0002] Most current chopsticks are made of bamboo or wood, but bamboo and wooden chopsticks have some defects: bamboo chopsticks adsorb and hide dirt, which is not conducive to health; painted wooden chopsticks often have certain toxins, which is contrary to good health. Although disposable chopsticks are relatively clean and hygienic, under the premise of such a large demand, it causes huge waste of resources. China is a populous country, with more than 2 billion people using chopsticks in the world, having a huge market. The disadvantages of traditional chopsticks have become an obstacle to people's pursuit of high-quality life.

[0003] Currently, the existing ceramic chopsticks have a solid structure and are relatively heavy. Especially when used by children, due to the large weight, it is inconvenient to use. In addition, solid ceramic chopsticks consume more materials and have a higher cost than hollow ceramic chopsticks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in view of the defects of existing bamboo and wooden chopsticks, to provide a forming method of hollow ceramic chopsticks that is hygienic, light in weight, and easy to clean.

[0005] In view of the above problems, the technical solution proposed by the present invention is: a centrifugal forming method for making hollow ceramic chopsticks. The mold sleeve is inclined and arranged on the turntable, then the mold is placed in the mold sleeve, and then the liquid ceramic raw material is injected into the mold. The turntable, the mold sleeve, and the mold are driven by a motor to rotate, so that the liquid ceramic raw material in the mold forms a hollow structure under the action of centrifugal force. After the ceramic raw material in the mold solidifies into a solid state, the mold is opened and the solid hollow ceramic chopsticks are taken out.

[0006] Preferably, the mold sleeve is inclined and arranged on the turntable by arranging a wedge-shaped adjusting plate between the turntable and the mold sleeve, so that the mold sleeve is inclined and arranged on the turntable. The inclination angle between the mold sleeve and the turntable is adjusted by changing the thickness of one end of the adjusting plate, and the degree of hollowness of the ceramic chopsticks is adjusted by adjusting the size of the inclination angle.

[0007] Preferably, the included angle between the mold sleeve and the turntable is 75 degrees - 85 degrees.

[0008] Preferably, the bottom of the mold sleeve is fixedly connected to the adjusting plate, the adjusting plate is fixedly connected to the turntable, and the turntable is fixedly connected to the rotating shaft of the motor. The motor is started, so that the rotating shaft of the motor can drive the turntable, the adjusting plate, the mold sleeve, and the mold to rotate in sequence; a pressing mechanism is arranged on the mold sleeve, so that when the mold is placed in the mold sleeve, the mold is firmly fixed in the mold sleeve by the pressing mechanism.

[0009] Preferably, the die sleeve is set as a split die sleeve, which is divided into two parts. The cross-section of each part of the die sleeve is set as a C shape. The two C-shaped die sleeves are arranged oppositely, and an elastic gasket is fixedly connected in each C-shaped die sleeve. When the two C-shaped die sleeves approach each other, the two gaskets can press the die in the die sleeve, so as to firmly fix the die in the die sleeve.

[0010] Preferably, there is a gap between the two C-shaped die sleeves. Lugs are arranged on both sides of each C-shaped die sleeve, and through mounting holes are opened in the lugs. Bolts are passed through the lugs at the same position of the two die sleeves, and then nuts are sleeved on the bolts. Tightening the bolts can reduce the gap between the two C-shaped die sleeves, so that the two gaskets press the die in the die sleeve.

[0011] Preferably, the following steps are further included:

[0012] a. Place the die in the die sleeve and tighten the bolts at the lugs so that the two gaskets press the die in the die sleeve;

[0013] b. Inject liquid ceramic raw material into the die and let the liquid ceramic raw material gradually solidify into a gel state;

[0014] c. Start the motor to drive the die to rotate for 2 minutes to 5 minutes, so that the ceramic raw material in the inclined die forms a hollow structure under the action of centrifugal force;

[0015] d. Turn off the motor, take out the die from the die sleeve, and open the die to take out the solid hollow ceramic chopsticks formed in the die.

[0016] Preferably, the pressing mechanism includes a hand-tightening press block and a fastening nut. The die sleeve is set as an integral die sleeve, and the die is set as a hollow cuboid shape with openings at both ends. Through mounting holes are opened in two adjacent side walls of the die sleeve, a fastening nut is arranged at the mounting hole, and a hand-tightening press block is installed on the fastening nut. The die in the die sleeve is pressed by tightening the hand-tightening press block, so as to firmly fix the die in the die sleeve.

[0017] Preferably, the hand-tightening press block includes a screw head, a screw rod, a nut, a pressing plate and a pressing piece. The screw head is fixedly connected to the screw rod, and the pressing plate is fixedly connected between the nut and the pressing piece. External threads are arranged on the screw rod, and internal threads are arranged in the fastening nut and the nut. The whole formed by connecting the nut, the pressing plate and the pressing piece is arranged in the die sleeve. The screw rod passes through the mounting holes of the fastening nut and the side wall of the die sleeve, and the screw rod is in threaded fit with the nut. The pressing piece is made of an elastic material, and turning the screw head makes the pressing piece press the die in the die sleeve.

[0018] Preferably, the following steps are further included:

[0019] A. Place the mold in the mold sleeve, and tighten the screw head by hand so that the nut, pressing plate, and pressing piece rotate towards the mold, thereby pressing the mold in the mold sleeve with the pressing piece;

[0020] B. Inject liquid ceramic raw material into the mold and let the liquid ceramic raw material gradually solidify into a gel state;

[0021] C. Start the motor to drive the mold to rotate for 2 minutes - 5 minutes, so that the ceramic raw material in the inclined mold forms a hollow structure under the action of centrifugal force;

[0022] D. Turn off the motor, take out the mold from the mold sleeve, and open the mold to take out the formed solid hollow ceramic chopsticks in the mold.

[0023] The beneficial technical effects of the present invention are as follows: By injecting liquid ceramic slurry into the mold, then pressing and fixing the mold in the inclined mold sleeve, and driving the mold sleeve and the mold to rotate with the motor. Utilize the centrifugal force generated by the rotation to make the gradually solidified ceramic slurry in the mold into a hollow chopstick shape, and the ceramic slurry is gradually fixed and formed into hollow ceramic chopsticks in the mold. The hollow ceramic chopsticks manufactured by this method save consumables and costs, are lighter in weight, hygienic, beautiful, and easy to clean, and have excellent practical value and use value. Description of the Drawings

[0024] Figure 1 Schematic diagram of the overall structure of Embodiment 1; Figure 1 ;

[0025] Figure 2 Schematic diagram of the connection of the partial structure of Embodiment 1;

[0026] Figure 3 Enlarged view of the partial structure of Embodiment 1;

[0027] Figure 4 Schematic diagram of the overall structure of Embodiment 1; Figure 2 ;

[0028] Figure 5 Schematic diagram of the structure of the mold of Embodiment 1;

[0029] Figure 6 Schematic diagram of the structure of the mold sleeve and the pressing mechanism of Embodiment 2; Figure 1 ;

[0030] Figure 7 Schematic diagram of the structure of the mold sleeve and the pressing mechanism of Embodiment 2; Figure 2 ;

[0031] Figure 8 Enlarged view of the structure of the hand-tightening pressing block of Embodiment 2;

[0032] In the figure: bottom plate 11, border 12, support feet 13, turntable 2, die sleeve 31, lug 32, gasket 33, fastening nut 34, adjusting plate 4, motor 51, rotating shaft 52, stabilizing plate 53, mold 61, liquid injection hole 62, screw head 71, screw rod 72, nut 73, pressing plate 74, pressing piece 75. Detailed implementation mode

[0033] The present invention will be further described below in conjunction with embodiments and the accompanying drawings:

[0034] Embodiment 1

[0035] As Figure 1 、 Figure 2 and Figure 3 shown, the centrifugal forming device for hollow ceramic chopsticks includes a motor 51, a bracket, a turntable 2 and a die sleeve 31. Among them, the bracket includes a bottom plate 11, a border 12 and support feet 13. The bottom plate 11 is in the shape of a cuboid. The border 12 is arranged at the edge of the bottom plate 11, and the upper end surface of the bottom plate 11 is fixedly connected to the border 12. The support feet 13 are arranged at the four right-angle edges of the bottom plate 11, and the lower end surface of the bottom plate 11 is fixedly connected to four vertically arranged support feet 13. A transverse support foot 13 is connected between every two adjacent vertically arranged support feet 13. The vertically arranged support feet 13 play a supporting role, and the transverse support feet 13 play a stabilizing role.

[0036] An adjusting plate 4 is arranged between the die sleeve 31 and the turntable 2. The adjusting plate 4 is wedge-shaped, and the vertical cross-section of the adjusting plate 4 is triangular. The turntable 2, the adjusting plate 4 and the die sleeve 31 are fixedly connected as a whole. The transverse cross-section of the die sleeve 31 is C-shaped, and two C-shaped die sleeves 31 form an integral die sleeve 31. And the bottoms of the two C-shaped die sleeves 31 are welded and fixed on the adjusting plate 4, so that the whole die sleeve 31 is inclined on the turntable 2. The motor 51 is vertically arranged, the turntable 2 is fixedly connected to the rotating shaft 52 of the motor 51, and the disk surface of the turntable 2 is horizontally arranged. A gap is left between the two C-shaped die sleeves 31, forming a hollow cuboid shape with openings at both ends. Preferably, the gap between the two C-shaped die sleeves 31 is 2 mm - 3 mm.

[0037] Changing the thickness of one end of the adjusting plate 4 will change the height difference between the two ends of the adjusting plate 4 and the inclination angle of the adjusting plate 4, thereby changing the inclination angle between the die sleeve 31 and the turntable 2. When the motor 51 drives the turntable 2, the die sleeve 31 and the 61 mold to rotate, at the same rotational speed, the smaller the inclination angle between the die sleeve 31 and the turntable 2, the greater the centrifugal force on the liquid ceramic raw material in the 61 mold, and the larger the hollow formed. When the inclination angle between the die sleeve 31 and the turntable 2 is too small, the centrifugal force on the liquid ceramic raw material will be too large, resulting in the liquid ceramic raw material being disconnected in the middle, and the chopsticks manufactured will be disconnected at both ends. When the inclination angle between the die sleeve 31 and the turntable 2 is close to 90 degrees, the centrifugal force on the liquid ceramic raw material is too small, and it is difficult for the liquid ceramic raw material to form a hollow structure. Therefore, adjusting the size of the inclination angle between the die sleeve 31 and the turntable 2 can adjust the degree of hollowness of the ceramic chopsticks. In order to make the size of the hollow structure of the ceramic chopsticks appropriate, preferably, the included angle between the die sleeve 31 and the turntable 2 is 75 degrees - 85 degrees.

[0038] As Figure 3 and Figure 5 shown, the pressing mechanism of this embodiment includes lugs 32, bolts, nuts and gaskets 33. Lugs 32 are provided on both sides of each C-shaped die sleeve 31, and through mounting holes are opened on the lugs 32. The 61 mold is a hollow cuboid shape, and the shape of the hollow is the shape of the chopsticks, and the 61 mold is a two-piece structure. When the two pieces of the 61 mold are separated, the hollow will also be divided into two. A 62 liquid injection hole is opened at the top of the 61 mold, and the 62 liquid injection hole is communicated with the hollow.

[0039] Pass the bolt through the lugs 32 at the same position of the two die sleeves 31, then put a nut on the bolt, and tightening the bolt can reduce the distance between the two C-shaped die sleeves 31. A piece of elastic gasket 33 is also fixedly connected inside each C-shaped die sleeve 31, so that after the 61 mold is installed in the die sleeve 31, the two elastic gaskets 33 can press the two pieces of the 61 mold to prevent the two pieces of the 61 mold from spreading in the die sleeve 31. After putting the cuboid-shaped 61 mold into the die sleeve 31 and tightening the bolt on the lug 32, the bolt and the nut will squeeze the two lugs 32 towards the middle, thereby making the two die sleeves 31 approach each other. At this time, the two elastic gaskets 33 will further press the 61 mold to prevent the 61 mold from shaking in the die sleeve 31 when rotating.

[0040] As Figure 1 、 Figure 2 and Figure 4As shown, the bottom plate 11 of the bracket is provided with a through mounting hole, and the rotating shaft 52 passes through the mounting hole of the bottom plate 11 and is fixedly connected to the bottom of the turntable 2, so that the rotating shaft 52 can drive the turntable 2, the adjusting plate 4, the die sleeve 31 and the die 61 to rotate together in sequence. In this embodiment, 4 stabilizing plates 53 are fixedly connected to the circumferential direction of the motor 51 at equal intervals, and the upper ends of the 4 stabilizing plates 53 are all fixedly connected to the bottom of the bottom plate 11, so that the motor 51 is fixedly connected to the bracket.

[0041] As Figures 1 to 5 shown, the working steps and principle of this centrifugal forming device for hollow ceramic chopsticks are as follows: First, a catalyst and an initiator are added to the ceramic slurry to form a liquid ceramic raw material, and then the die 61 is installed in the die sleeve 31 fixed with the gasket 33, so that both the die sleeve 31 and the die 61 are inclined and arranged on the turntable 2. Then, the liquid ceramic raw material is injected into the die 61 from the liquid injection hole 62 of the die 61, and the liquid injection hole 62 is blocked with a soft plug for sealing. The bolt on the ear 32 is tightened to further press the die 61 by the gasket 33, so as to fix the die 61 in the die sleeve 31. Since there are a catalyst and an initiator in the ceramic raw material, the ceramic raw material will gradually solidify into a gel state in the die 61. The motor 51 is started to drive the die 61 to rotate for 2 to 5 minutes. Since the die 61 is inclined and arranged on the turntable 2, when the die 61 rotates, the middle part of the gel-like ceramic raw material in the die flows in two directions, up and down, under the action of centrifugal force, so that the ceramic raw material forms a hollow structure. The motor 51 is turned off, the die 61 is taken out of the die sleeve 31, and the die 61 is opened, and the formed solid hollow ceramic chopsticks in the die 61 are taken out.

[0042] Embodiment 2

[0043] As Figure 6 、 Figure 7 and Figure 8 shown, the difference between this embodiment and Embodiment 1 is that the pressing mechanism in this embodiment is different from that in Embodiment 1. The pressing mechanism in this embodiment includes a hand-tightening pressing block and a fastening nut 34. Among them, the hand-tightening pressing block includes a screw head 71, a screw rod 72, a nut 73, a pressing plate 74 and a pressing piece 75. The screw head 71 is fixedly connected to the screw rod 72, and the pressing plate 74 is fixedly connected between the nut 73 and the pressing piece 75. Both the pressing plate 74 and the pressing piece 75 are cylindrical, and the outer diameters of the pressing plate 74 and the pressing piece 75 are the same. The screw rod 72 is provided with an external thread, and internal threads are provided in the fastening nut 34 and the nut 73. The whole formed by connecting the nut 73, the pressing plate 74 and the pressing piece 75 is arranged in the die sleeve 31.

[0044] The die sleeve 31 is an integral die sleeve 31, which is in the shape of a hollow cuboid with openings at both ends. Through mounting holes are provided on two adjacent side walls of the die sleeve 31. A fastening nut 34 is provided on the outer side wall of the die sleeve 31 at the mounting hole. The screw rod 72 is passed through the fastening nut 34 and the mounting hole in the side wall of the die sleeve 31, and the screw rod 72 is in threaded engagement with the nut 73. A groove matching the sizes of the pressing plate 74 and the pressing piece 75 is provided on the inner side wall of the die sleeve 31, and the depth of the groove is greater than or equal to the sum of the thicknesses of the nut 73, the pressing plate 74 and the pressing piece 75. In this embodiment, the thickness of the side wall of the die sleeve 31 is 9 mm, the depth of the groove is 6 mm, and the thicknesses of the nut 73, the pressing plate 74 and the pressing piece 75 are all 2 mm. When the 61 die is placed into the die sleeve 31, first turn the screw head 71 counterclockwise to make the screw rod 72 drive the nut 73, the pressing plate 74 and the pressing piece 75 to move outward. When the nut 73 abuts against the bottom of the groove, stop turning the screw head 71. Turn all the hand-tightening blocks until the nut 73 abuts against the bottom of the groove. At this time, all the pressing pieces 75 are in the groove and will not protrude from the inner side wall of the die sleeve 31. When the 61 die is placed into the die sleeve 31, the pressing piece 75 will not interfere with the 61 die.

[0045] After the 61 die is installed in the die sleeve 31, then turn the screw head 71 clockwise to make the nut 73, the pressing plate 74 and the pressing piece 75 move towards the 61 die until the pressing piece 75 presses the 61 die in the die sleeve 31. Since nuts and hand-tightening blocks are provided on two adjacent side walls of the die sleeve 31, the 61 die can be pressed from two mutually perpendicular directions. The pressing piece 75 is made of an elastic material. When the pressing piece 75 presses the 61 die, it will not cause damage to the 61 die, and can prevent the 61 die from shaking when rotating, ensuring the quality of the product in the 61 die.

[0046] The differences in the working steps and principles between this embodiment and the first embodiment are as follows: In this embodiment, the operator tightens the hand-tightening block by hand to press the 61 die in the die sleeve 31. For the remaining steps and principles, this embodiment is the same as the first embodiment.

[0047] Obviously, without departing from the principle described in the present invention, several improvements or modifications made should be regarded as the protection scope of the present invention.

Claims

1. A method for centrifugal molding of hollow ceramic chopsticks, characterized in that, The die sleeve is inclined and set on the turntable, then the mold is placed in the die sleeve, and then the liquid ceramic raw material is injected into the mold. The turntable, die sleeve and mold are driven by a motor to rotate, so that the liquid ceramic raw material in the mold forms a hollow structure under the action of centrifugal force. After the ceramic raw material in the mold solidifies into a solid state, the mold is opened and the solid hollow ceramic chopsticks are taken out; setting the die sleeve inclined on the turntable is to set a wedge-shaped adjusting plate between the turntable and the die sleeve, so that the die sleeve is inclined on the turntable. The inclination angle between the die sleeve and the turntable is adjusted by changing the thickness of one end of the adjusting plate, and the degree of hollowness of the ceramic chopsticks is adjusted by adjusting the size of the inclination angle. The included angle between the die sleeve and the turntable is 75 degrees - 85 degrees; the bottom of the die sleeve is fixedly connected to the adjusting plate, the adjusting plate is fixedly connected to the turntable, and the turntable is fixedly connected to the rotating shaft of the motor. The motor is started so that the rotating shaft of the motor can drive the turntable, adjusting plate, die sleeve and mold to rotate in sequence; a pressing mechanism is arranged on the die sleeve, so that when the mold is placed in the die sleeve, the mold is fixed firmly in the die sleeve through the pressing mechanism; the die sleeve is set as a split die sleeve, so that the die sleeve is divided into two parts, and the cross section of each part of the die sleeve is set as a C shape; the two C-shaped die sleeves are arranged oppositely, and an elastic gasket is fixedly connected in each C-shaped die sleeve. When the two C-shaped die sleeves approach each other, the two gaskets can press the mold in the die sleeve, so as to fix the mold firmly in the die sleeve.

2. The centrifugal molding method for making hollow ceramic chopsticks according to claim 1, characterized in that, There is a gap between the two C-shaped die sleeves. Lugs are arranged on both sides of each C-shaped die sleeve, and through mounting holes are opened in the lugs. Bolts are passed through the lugs at the same position of the two die sleeves, and nuts are sleeved on the bolts; tightening the bolts can reduce the gap between the two C-shaped die sleeves, so that the two gaskets press the mold in the die sleeve.

3. The centrifugal molding manufacturing method of the hollow ceramic chopsticks according to claim 2, characterized in that, The centrifugal forming manufacturing method of the hollow ceramic chopsticks further includes the following steps: a. Place the mold in the die sleeve and tighten the bolts at the lugs so that the two gaskets press the mold in the die sleeve; b. Inject liquid ceramic raw material into the mold and let the liquid ceramic raw material gradually solidify into a gel state; c. Start the motor to drive the mold to rotate for 2 minutes - 5 minutes, so that the ceramic raw material in the inclined mold forms a hollow structure under the action of centrifugal force; d. Turn off the motor, take out the mold from the die sleeve, open the mold, and take out the solid hollow ceramic chopsticks formed in the mold.

4. The centrifugal molding method for making hollow ceramic chopsticks according to claim 1, characterized in that, The pressing mechanism includes a hand-tightening pressing block and a fastening nut. The die sleeve is set as an integral die sleeve, and the die sleeve is set as a hollow cuboid shape with openings at both ends. Through mounting holes are opened in two adjacent side walls of the die sleeve, a fastening nut is arranged at the mounting hole, and a hand-tightening pressing block is installed on the fastening nut. The mold in the die sleeve is pressed by tightening the hand-tightening pressing block, so as to fix the mold firmly in the die sleeve.

5. The centrifugal forming method for making hollow ceramic chopsticks according to claim 4, characterized in that, The hand-twist pressing block includes a screw head, a screw rod, a nut, a pressing plate and a pressing piece. The screw head is fixedly connected to the screw rod, and the pressing plate is fixedly connected between the nut and the pressing piece. External threads are provided on the screw rod, and internal threads are provided in the fastening nut and the nut. The whole formed by connecting the nut, the pressing plate and the pressing piece is arranged in the mold sleeve. The screw rod passes through the fastening nut and the mounting hole on the side wall of the mold sleeve, and the screw rod is in threaded fit with the nut. The pressing piece is made of an elastic material. By turning the screw head, the pressing piece presses the mold in the mold sleeve tightly.

6. The centrifugal forming method for making hollow ceramic chopsticks according to claim 5, characterized in that, The centrifugal forming method for the hollow ceramic chopsticks further includes the following steps: A. Place the mold in the mold sleeve and tighten the screw head by hand, so that the nut, the pressing plate and the pressing piece rotate towards the mold, thereby pressing the mold in the mold sleeve tightly by the pressing piece; B. Inject the liquid ceramic raw material into the mold and let the liquid ceramic raw material gradually solidify into a gel state; C. Start the motor to drive the mold to rotate for 2 minutes to 5 minutes, so that the ceramic raw material in the inclined mold forms a hollow structure under the action of centrifugal force; D. Turn off the motor, take out the mold from the mold sleeve, and open the mold to take out the formed solid hollow ceramic chopsticks in the mold.

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