TWI428267B - Charging barrel and charging system with the same - Google Patents

Description

Cartridge and feeding system having the same

The present invention relates to an injection molding apparatus, and more particularly to a cylinder that prevents material from collecting on an inner wall and a feeding system having the same.

In recent years, as the demand for light and thin electronic products has increased, miniaturized and low-cost plastic products, especially optical products attached to portable devices such as notebook computers and mobile phones, have become more and more widely used. In order to obtain high-quality plastic products, such as microlenses, lens barrels, mirror holders, spacer rings, etc., injection molding methods are usually used for mass production. See Yao-Be Wang et al., Proceedings of the 2005 IEEE International Conference on Mechatronics July 10-12, 2005, Design and Fabrication of an All-Electric Tiebarless In Mection Machine in Taipei, Taiwan. The injection molding method can directly form a plastic product, has a short molding cycle and high precision, greatly improves the production efficiency and output of the plastic product, and reduces the production cost.

The injection molding machine includes a feeding system, a melting device, and an injection mold. When an injection molding machine is used to produce an injection molded product, the heated plasticized material is usually supplied from the supply system and the melting equipment to the injection mold for molding. The feed system typically includes a connected hopper and barrel. After the material (such as plastic particles) enters the feeding system from the hopper, it is stored in the barrel, then is heated and plasticized into the melting equipment, and finally injected into the injection mold to form. To ensure continuous production of the injection molding machine, the barrel usually has a high material retention Degrees, when the material stored in the barrel is lower than the material holding height, the material must be added to the feeding system.

The feeding system of the prior art is provided with a material sensor at the material holding height of the barrel, and when the material sensor senses that the material in the material is insufficient at the material holding height, it is determined that the material in the barrel is insufficient, and the feeding is performed. Instructions. However, the material entering the barrel from the hopper is electrostatically charged due to contact, friction, etc., and the static electricity causes the material added to the barrel to be stacked on the inner wall of the barrel. At this time, although the material in the barrel is insufficient, the material sensor still senses that there is material at the material holding height on the inner wall of the barrel and misjudges that the material in the barrel is sufficient. Inaccurate sensing results will result in insufficient feed, which will hinder the continuous development of the injection molding process and affect the efficiency of continuous production.

In view of the above, it is necessary to provide a cartridge that prevents material from collecting on the inner wall and a feeding system having the cartridge.

A cartridge includes a barrel, a boss and a conductive element. The barrel has a receiving hole for receiving material. The boss is disposed on the cylinder and protrudes into the receiving hole. The conductive element is disposed on the boss.

A feeding system comprising a cartridge as described above, a hopper connected to the cartridge, and a material sensor disposed outside the cartridge. The hopper has a receiving bin connected to the receiving hole to receive the material. The material sensor is opposite to the boss for sensing whether there is material in the corresponding position of the boss in the receiving hole.

Compared with the prior art, the boss of the barrel of the present technical solution protrudes into the receiving hole to prevent the materials from being stacked there. The cartridge also has a conductive member that can discharge static electricity inside the cylinder, thereby further preventing material from collecting in the cylinder. Feed system with the barrel The system can accurately sense whether there is material in the corresponding position of the boss in the barrel, which is beneficial to the smooth progress of the injection molding process and the improvement of continuous production efficiency.

10, 20‧‧‧ barrel

11, 21‧‧‧ barrel

110‧‧‧First end

111‧‧‧second end

112, 212‧‧‧ receiving holes

113, 213‧‧‧ inner surface

114‧‧‧ outer surface

115‧‧‧ openings

116‧‧‧ Connection surface

12, 22‧‧‧ boss

121‧‧‧floor

122‧‧‧ side panels

123‧‧‧Contact plate

124‧‧‧through hole

13, 23‧‧‧ conductive elements

14‧‧‧ airtight cushion

141‧‧‧Part 1

142‧‧‧Part II

100‧‧‧Feeding system

101‧‧‧ hopper

102‧‧‧Material Sensor

103‧‧‧ Receiving bin

104‧‧‧Feeding Department

105‧‧‧Connecting Department

200‧‧‧Materials

FIG. 1 is an exploded perspective view of a cartridge provided by a first embodiment of the present technical solution.

2 is a schematic structural view of a cartridge provided by the first embodiment of the present technical solution.

Figure 3 is a cross-sectional view taken along line III-III of Figure 2.

FIG. 4 is a schematic structural view of a feeding system provided by the technical solution.

FIG. 5 is a schematic view showing the state of use of the feeding system provided by the technical solution.

FIG. 6 is a schematic cross-sectional view of a cartridge provided by a second embodiment of the present technical solution.

The cartridge provided by the technical solution will be further described in detail below with reference to the accompanying drawings and a plurality of embodiments.

Referring to FIG. 1 to FIG. 3 , the cartridge 10 provided by the first embodiment of the present invention includes a barrel 11 , a boss 12 , a conductive member 13 , and a gas tight pad 14 .

The barrel 11 includes an opposite first end 110 and a second end 111. The first end portion 110 is for connection with a hopper for material to enter the barrel 11. The second end 111 is for connection to a melting device. The cylinder 11 has a hollow cylindrical shape and has a receiving hole 112 for accommodating material. The barrel 11 has opposing inner and outer surfaces 113, 114. The barrel 11 also has an opening 115 that extends through the inner surface 113 and the outer surface 114. In this embodiment, the opening 115 is a square, which is opened at the material holding height of the cylinder 11. When the height of the material received in the receiving hole 112 is lower than the material holding height, the material must be replenished into the receiving hole 112. . The opening 115 of the cylinder 11 has a connecting inner surface 113 and The connecting surface 116 of the outer surface 114.

The boss 12 is disposed in the opening 115 and protrudes into the receiving hole 112 of the cylinder 11 for preventing materials from being stacked on the inner surface 113. The boss 12 is substantially a square block including a bottom plate 121, a side plate 122 and a contact plate 123. The bottom plate 121 is substantially a square plate body located inside the receiving hole 112 and opposed to the inner surface 113. The contact plate 123 is a square hollow plate body located outside the cylindrical body 11 and opposed to the outer surface 114 of the cylindrical body 11. The side plate 122 is also a square hollow plate body and is vertically connected between the bottom plate 121 and the contact plate 123. Preferably, the distance between the bottom plate 121 and the contact plate 123 is 1/3 to 1/5 of the diameter of the cylindrical body 11. The boss 12 is transparent so that the operator can observe the material in the receiving hole 112. In this embodiment, the boss 12 is made of transparent glass. The boss 12 further has a through hole 124 near the second end portion 111 of the cylindrical body 11. The through hole 124 penetrates the bottom plate 121, the side plate 122 and the contact plate 123.

The conductive element 13 is disposed on the boss 12 for contacting the material entering the barrel 11 from the first end portion 110 and discharging the static electricity of the material. In this embodiment, the conductive member 13 is a wire, and one end thereof passes through the through hole 124 of the boss 12 and extends into the receiving hole 112, and the other end is grounded.

The airtight gasket 14 is used to ensure airtightness between the cylinder 11 and the boss 12, and includes a first portion 141 and a second portion 142 that are connected. Corresponding to the shape of the boss 12, the first portion 141 and the second portion 142 are both square frames. The first portion 141 simultaneously contacts the side surface 116 of the barrel 11 with the side plate 122 of the boss 12 to ensure airtightness between the side plate 122 and the barrel 11. The second portion 142 simultaneously contacts the contact plate 123 with the outer surface 114 of the barrel 11 to ensure airtightness between the contact plate 123 and the barrel 11.

It can be understood that the shape of the cylinder 11 is not limited to a cylindrical shape, and may also be a triangular prism. The cross-section of the quadrangular prism and the pentagonal prism is a hollow cylindrical shape. The shape of the boss 12 is not limited to a square shape, and may be a circle, a triangle, a pentagon, a hexagon, or other irregular shape, and only needs to match the shape of the opening 115.

Referring to FIG. 4, the feeding system 100 provided by the embodiment of the present technical solution includes a hopper 101, a material sensor 102 and a cartridge 10 as described above.

The hopper 101 is coupled to the first end 110 of the cartridge 10. The hopper 101 has a receiving bin 103 in communication with the receiving opening 112 for receiving material and for passing material from the hopper 101 into the cartridge 10. In the present embodiment, the hopper 101 is funnel-shaped, and has a connecting portion 104 and a connecting portion 105. The cross-sectional area of the feeding portion 104 is larger than the cross-sectional area of the connecting portion 105. The feeding portion 104 is for adding materials, and the connecting portion 105 is for connecting with the first end portion 110 of the cylinder 11.

The material sensor 102 is disposed outside the barrel 10 with respect to the boss 12 for sensing the amount of material corresponding to the boss 12 in the receiving hole 112. The feeding system 100 can extend from the outer surface 114 of the cylinder 10 to a holding member. A receiving hole is disposed in the holding member relative to the boss 12, and the material sensor 102 can be received in the receiving hole to be fixed. In this embodiment, the material sensor 102 is a capacitive material sensor. When working, the capacitive material sensor sends a high frequency detection signal to the barrel 10, so that the capacitive material sensor and the receiving material are received. A capacitance is generated between the materials corresponding to the bosses 12 in the holes 112. When the materials are gradually consumed, and there is no material corresponding to the bosses 12 in the receiving holes 112, since the dielectric constant of the air is different from the dielectric constant of the materials, Therefore, the capacitance sensed by the capacitive material sensor is also changed, and it can be determined that there is no material corresponding to the boss 12 in the receiving hole 112.

Referring to FIG. 5, when the material 200 is loaded by the feeding system 100, the material 200 passes through the receiving bin 103 of the hopper 101 and enters the receiving hole 112 of the cylinder 10, possibly due to contact or friction. With static electricity, the conductive element 13 can discharge the static electricity of the material 200 from the material 10 by entering the material of the cartridge 10 to prevent the material 200 from collecting on the inner surface 113 of the cylinder 10. When the height of the material 200 is lower than the boss 12, even if a small amount of residual static electricity causes the material 200 to gather toward the inner surface 113 of the cylinder 10, since the boss 12 protrudes from the inner surface 113 of the cylinder 10, the material 200 It also does not gather at the boss 12. Therefore, the material sensor 102 can accurately determine whether there is material in the corresponding position of the boss 12 in the receiving hole 112, and does not cause the wrong judgment result due to the static concentration of the material 200 on the inner surface 113, thereby ensuring the production. Continuously.

Referring to FIG. 6, the cartridge 20 provided by the second embodiment of the present invention is substantially the same as the cartridge 10 of the first embodiment, except that the boss 22 of the cartridge 20 is a square solid block. The inner surface 213 of the body 21 extends toward the central axis of the receiving hole 212, and the conductive member 23 is a conductive film covering the surface of the boss 22. Preferably, the conductive element 23 is grounded to direct static electricity in time. Of course, the boss 22 can also be made of a conductive material so as to function as the conductive member 23. In order to facilitate the material sensor to sense whether there is material at the boss 22 in the cylinder 20, the material of the boss 21 on which the boss 22 is disposed is preferably glass.

When the material is loaded by the cartridge 20, after the material particles contact the boss 22, the static electricity carried by the material is removed by the conductive member 23, so that it can continue downward without being concentrated on the inner surface 213.

Compared with the prior art, the boss of the barrel of the present technical solution protrudes into the receiving hole to prevent the materials from being stacked there. The cartridge also has a conductive member that can discharge static electricity inside the cylinder, thereby further preventing material from collecting in the cylinder. The feeding system with the barrel can accurately sense whether there is material in the corresponding position of the boss in the barrel, which is favorable for the smooth progress of the injection molding process and the improvement of continuous production efficiency.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Bowl

11‧‧‧Cylinder

110‧‧‧First end

111‧‧‧second end

112‧‧‧ receiving hole

113‧‧‧ inner surface

114‧‧‧ outer surface

115‧‧‧ openings

116‧‧‧ Connection surface

12‧‧‧Boss

121‧‧‧floor

122‧‧‧ side panels

123‧‧‧Contact plate

124‧‧‧through hole

13‧‧‧Conducting components

14‧‧‧ airtight cushion

141‧‧‧Part 1

142‧‧‧Part II

Claims (6)

A cartridge comprising a barrel, a boss and a conductive element, the barrel having a receiving hole for receiving material, the barrel having an inner surface, an outer surface opposite the inner surface, and an inner surface and an outer surface The opening has a connecting surface connected between the inner surface and the outer surface, the boss is disposed in the opening and protrudes into the receiving hole, the boss comprises a bottom plate and a side plate, a bottom plate corresponding to the opening, the side plate is connected between the bottom plate and the connecting surface, the conductive element is disposed on the boss, the barrel further comprises an airtight pad, and the airtight pad is disposed on Between the connecting surface and the boss. The cartridge of claim 1, wherein the receiving hole has a circular cross-sectional shape, and the length of the protruding portion protruding into the receiving hole is 1/5 of the diameter of the receiving hole. 1/3. The cartridge of claim 1, wherein the conductive member is a wire, and the boss has a through hole corresponding to the wire for the wire to pass through. The cartridge of claim 1, wherein the conductive member is a conductive film formed on a surface of the boss. The cartridge of claim 3, wherein the conductive element is grounded. A feeding system comprising a cartridge according to claim 1 of the patent application, a hopper connected to the cartridge, and a material sensor disposed outside the cartridge, the hopper having a receiving material connected to the receiving hole The warehouse is configured to receive materials, and the material sensor is opposite to the boss, and is configured to sense whether there is material in the corresponding position of the boss in the receiving hole.