TWI399278B - Removing device - Google Patents

Description

Clearing device

The invention relates to a cleaning device.

Injection molding technology refers to the injection of the injection material into the barrel of the injection machine, heated to a molten state, pushed by the screw or plunger of the injection machine, into the mold cavity of the mold through the pouring system of the nozzle and the mold, and the injection material is cooled. Hardening (see Knowledge Based Research on Integrated Design Methods of Hot-Runner Technology for Multi-Cavity Injection Molding, Mechatronics and Automation, 2007. ICMA 2007. International Conference on, 5-8 Aug. 2007 Page(s): 469- 474).

However, in the normal production of the nozzle for plastic injection molding, due to the accurate measurement parameters of the mold (not shown), it is rare that the plastic is cooled in the nozzle and the nozzle is stuck together. However, when the nozzle is in the test mode, the metering parameter of the mold has not been determined or the measurement parameters of the mold are inaccurate several times before the production, so that the blocking phenomenon of the plastic in the nozzle often occurs. Generally, a tool such as a screwdriver is used to clear the plastic. When the plastic is loosened to a certain extent, the plastic can be completely detached from the nozzle. However, in the process of loosening the plastic, the mouth of the nozzle is easily damaged by the screwdriver.

In view of the above, it is necessary to provide a cleaning device that can prevent the mouth of the plastic injection molding from being damaged.

A cleaning device for removing plastic from a nozzle in an injection molding die. The injection molding die has a fixed side device plate, a positioning ring fixedly mounted on the fixed side device plate, and a filling nozzle. The fixed side device board has a first receiving hole coaxial with the positioning ring. The first receiving hole is for receiving the filling nozzle. The filling nozzle includes a nozzle opening coaxial with the first receiving hole and a sprue communicating with the filling mouth. The mouth of the nozzle is closer to the positioning ring than the channel. The cleaning device includes a positioning seat fixedly received in the positioning ring and an impact member. The positioning seat is provided with a second receiving hole extending through the positioning seat for receiving the impact member. The second receiving hole is coaxial with the positioning ring, so that the impact member received therein passes through the positioning seat and impacts the plastic in a direction perpendicular to the nozzle opening. The impact member has an impact bar and a pin fixed to the impact bar. The needle is away from the end of the impact bar toward the plastic in the nozzle. The impact bar has a first section that is larger in diameter and adjacent to the nozzle and a second section that is smaller in diameter and away from the nozzle. The second receiving hole has a first hole having a diameter equal to the diameter of the first segment and a second hole having a diameter equal to or smaller than the diameter of the second segment, and the length of the second segment along the central axis of the positioning ring is greater than The second hole is along the length of the central axis of the positioning ring.

Compared with the prior art, the cleaning device guides the impact direction of the impact member by the positioning ring and the positioning seat, so that the impact member can only impact the plastic in a direction perpendicular to the mouth of the nozzle, thereby making the nozzle The mouth is protected from damage during the impact.

10, 10a‧‧‧ removal device

20‧‧‧ Injection molding dies

22‧‧‧Dors

24, 24a‧‧‧ plastic

26‧‧‧Fixed side panel

262‧‧‧ first receiving hole

28, 28a‧‧‧ positioning ring

280‧‧‧ screws

282‧‧‧through hole

222, 222a‧‧ ‧ mouthpiece

224‧‧‧Note

12, 12a‧‧‧ Positioning Block

14, 14a‧‧‧ impact parts

122, 122a‧‧‧Second receiving hole

1222‧‧‧ first hole

1224‧‧‧ second hole

142‧‧‧ impact rod

1422‧‧‧ first paragraph

1424‧‧‧second paragraph

1426‧‧‧ third paragraph

144‧‧‧needle

1442‧‧‧Fixed Department

1444‧‧‧ head

1446‧‧‧Connecting Department

146‧‧‧ impact block

148‧‧‧Remove parts

1428‧‧‧ impact surface

1429‧‧‧First fixed unit

1445‧‧‧Second fixed unit

1447‧‧‧ first end

1448‧‧‧ second end

1462‧‧‧ third hole

FIG. 1 is a schematic diagram of a combination of a cleaning device according to a first embodiment of the present invention.

2 is a schematic structural view of a cleaning device according to a first embodiment of the present invention.

3 is an exploded perspective view of a cleaning device according to a first embodiment of the present invention.

4 is a schematic structural view of a cleaning device according to a second embodiment of the present invention.

The present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, FIG. 2 and FIG. 3 together, the cleaning device 10 according to the first embodiment of the present invention is used for removing the plastic 24 in the nozzle 22 of the plastic injection molding die 20.

The injection molding die 20 further has a fixed side device plate 26 and a positioning ring 28 fixedly mounted on the fixed side device plate 26 by screws 280. In this embodiment, the center of the positioning ring 28 is a circular through hole 282. Of course, the center of the positioning ring 28 may also be a truncated-shaped through hole, that is, the truncated-shaped through-hole is parallel to the central axis of the positioning ring 28 and has a trapezoidal shape.

The fixed side device plate 26 has a first receiving hole 262 for receiving the filling nozzle 22. The central axis of the first receiving hole 262 coincides with the central axis of the positioning ring 28 such that the positioning ring 28 and the central axis of the nozzle 22 are on the same line.

The filling nozzle 22 includes a nozzle opening 222 and a sprue 224 that communicates with the filling opening 222 and receives the plastic 24. The mouthpiece 222 is closer to the positioning ring 28 than the channel 224 and is coaxial with the positioning ring 28. The cleaning device 10 includes a positioning seat 12 and an impact member 14.

The positioning seat 12 is in the shape of a two-stage cylinder, and the diameter of the end portion contacting the positioning ring 28 is equal to the diameter of the positioning ring 28, so that the positioning seat 12 can be fixedly received in the positioning ring 28 Inside. The positioning seat 12 is provided with a second receiving hole 122 for receiving the impact member 14 through the positioning seat 12 along the central axis direction of the positioning base 12 . The central axis of the second receiving hole 122 coincides with the central axis of the positioning ring 28, so that the impact member 14 received therein passes through the positioning seat 12 and impacts the plastic 24 in the direction of the vertical nozzle opening 222.

The second receiving hole 122 is a counterbore having a first hole 1222 having a larger diameter and a second hole 1224 having a smaller diameter, and the first hole 1222 is adjacent to the filling nozzle 22.

The impact member 14 has an impact bar 142, a pin 144 fixed to the end of the impact bar 142 near the nozzle 22, a shock block 146 movably disposed through the impact bar 142, and a fixed portion The shock The rod 142 is remote from the end of the nozzle 22 for preventing the impact block 146 from coming off the stop 148 of the impact rod.

The impact bar 142 is a three-stage cylinder having a first segment 1422, a second segment 1424, and a third segment 1426 in order from the side closer to the nozzle 22 . The diameters of the first segment 1422, the second segment 1424, and the third segment 1426 are sequentially reduced such that the second segment 1424 contacts the third segment 1426 to form an impact surface 1428.

A first fixing unit 1429 extending along a central axis of the first segment 1422 is disposed on the end surface of the first segment 1422 facing the nozzle 22, and the diameter of the first segment 1422 is equal to the second receiving hole 122. The diameter of the first hole 1224 is such that the impact bar 142 can drive the positioning seat 12 away from the positioning ring 28 after the plastic 24 is removed. In this embodiment, the first fixing unit 1429 is a screw column (ie, the outer surface of the cylinder has a thread).

Of course, the first fixing unit 1429 can also be a fixing member such as a screw hole, a through hole, a cylinder, a quadrangular prism, and a pentagonal prism.

Of course, the number of the first fixing units 1429 may also be two or three or four or more.

The diameter of the second segment 1424 is less than or equal to the diameter of the second hole 1224, and the length of the second segment 1426 in a direction parallel to the central axis of the positioning ring 28 is greater than the second hole 1224 is parallel to the positioning ring 28 The length of the central axis direction is such that the impact bar 142 can pass through the positioning seat 12.

The shot 144 can be made of a material such as copper, iron, or nickel. Preferably, in the present embodiment, the firing pin 144 is made of a copper material. The nozzle 22 is generally made of a stainless steel material and has a relatively high hardness. Therefore, the copper needle 144 having a relatively soft hardness is used for impact, and even if the needle 144 hits the nozzle opening 222, the mouth of the nozzle is not 222 caused damage.

The pin 144 has a cylindrical fixing portion 1442, a cylindrical striking head 1444 away from the fixing portion 1442 and having a diameter smaller than the diameter of the fixing portion 1442, and a fixing head portion 1442 and a striking head 1444. The connecting portion 1446. The striker 1444 can enter the sprue 224 to contact the plastic 24 during the impact.

The fixing portion 1442 is provided with a second fixing unit 1445 for use with the first fixing unit 1429 on the end surface of the impact bar 142 so that the pin 144 is fixedly integrated with the impact bar 142. In this embodiment, the second fixing unit 1445 is a screw hole. Of course, the second fixing unit 1445 can also be a fixing member used in conjunction with the first fixing unit 1429 such as a screw column, a through hole, a cylinder, a quadrangular prism, a pentagonal prism, and the like.

The connecting portion 1446 is shaped as a truncated cone having a first end 1447 coupled to the fixed portion 1442 and a second end 1448 opposite the first end 1447 and coupled to the striker 1444. The diameter of the first end 1447 is the same as the diameter of the fixing portion 1442. The second end 1448 has a diameter smaller than the diameter of the fixing portion 1442 and greater than or equal to the diameter of the hitting head 1444. Since the shape of the connecting portion 1446 is a truncated cone, the possibility of the needle 144 contacting the nozzle opening 222 is reduced, thereby reducing the possibility that the firing pin 144 damages the filling port 222.

The impact block 146 is a cylindrical structure having a geometrically centered third hole 1462 extending through the impact block 146 and having the same diameter as the third section 1426 of the impact bar 142 to move the impact block 146. The ground is disposed on the third section 1426 of the impact bar 142. The impact block 146 is used to impact the impact surface 1428 to drive the impact bar 142 and the pin 144 to impact the plastic 24.

Of course, the impact bar 142 can also be a two-stage cylinder.

Of course, the shape of the pin 144 may be other shapes such as a cone shape or an ellipsoid shape.

The cleaning device 10 of the first embodiment of the present invention guides the impact direction of the impact member 14 by the positioning ring 28 and the positioning seat 12, so that the impact member 14 can only impact the plastic in the direction perpendicular to the nozzle opening 222. 24, thereby protecting the mouthpiece 222 from damage. Further, the cleaning device 10 does not need to detach the nozzle 22 from the injection molding die 20, thereby reducing the number of steps and shortening the time.

Referring to FIG. 4, a cleaning device 10a according to a second embodiment of the present invention is substantially identical to the cleaning device 10, and has a positioning seat 12a received in the positioning ring 28a and an impact member 14a. The positioning seat 12a is provided. And a second receiving hole 122a for receiving the impacting member 14a, the central axis of the second receiving hole 122a coincides with the central axis of the positioning ring 28a, so that the impact member 14a received therein is worn. The second receiving hole 122a of the positioning seat 12a is a through hole, and the impacting member 14a is a diameter and the second receiving hole 122a. The second receiving hole 122a of the positioning seat 12a is a through hole. The impact rod has the same diameter, and the end portion of the impact member 14a near the nozzle opening 222a is semi-ellipsoidal.

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.

20‧‧‧ Injection molding dies

22‧‧‧Dors

24‧‧‧ plastic

26‧‧‧Fixed side panel

262‧‧‧ first receiving hole

28‧‧‧ positioning ring

280‧‧‧ screws

222‧‧‧mouth mouth

224‧‧‧Note

12‧‧‧ Positioning Block

122‧‧‧Second receiving hole

1222‧‧‧ first hole

1224‧‧‧ second hole

142‧‧‧ impact rod

1422‧‧‧ first paragraph

1424‧‧‧second paragraph

1426‧‧‧ third paragraph

144‧‧‧needle

1442‧‧‧Fixed Department

1444‧‧‧ head

1446‧‧‧Connecting Department

146‧‧‧ impact block

148‧‧‧Remove parts

1429‧‧‧First fixed unit

1445‧‧‧Second fixed unit

1447‧‧‧ first end

1448‧‧‧ second end

Claims (8)

A cleaning device for removing plastic in a nozzle in an injection molding die, the injection molding die having a fixed side device plate, a positioning ring fixedly mounted on the fixed side device plate, and a filling nozzle, The fixed side device board has a first receiving hole coaxial with the positioning ring, the first receiving hole is for receiving the filling nozzle, the filling nozzle comprises a filling mouth coaxial with the first receiving hole, and a filling The nozzle is connected to the nozzle, and the nozzle mouth is closer to the positioning ring than the nozzle. The improvement device comprises: a positioning device fixedly received in the positioning ring and an impact member, the positioning seat a second receiving hole extending through the positioning seat for receiving the impacting member, the second receiving hole being coaxial with the positioning ring, so that the impact member received therein passes through the positioning seat and perpendicular to the filling nozzle The impact of the mouth impacts the plastic, the impact member has an impact bar and a pin fixed to one end of the impact bar, the pin is away from the end of the impact bar toward the plastic in the nozzle, the impact bar has a diameter Larger and close to the first section of the nozzle a second hole having a diameter smaller than the nozzle, the second receiving hole has a first hole having a diameter equal to the diameter of the first segment and a second hole having a diameter equal to or smaller than the diameter of the second segment, and the second hole The length of the second section along the central axis of the positioning ring is greater than the length of the second hole along the central axis of the positioning ring. The cleaning device of claim 1, wherein the impact bar is provided with at least one first fixing unit near the end of the impact pin, and the pin is disposed adjacent to the end of the impact bar. The second fixing unit is used in combination with the fixing unit to fix the needle to the impact bar. The cleaning device of claim 2, wherein the first fixing unit is a screw or a screw hole, and the second fixing unit is a screw hole or a screw. The cleaning device of claim 1, wherein the shape of the shot is semi-ellipsoidal. The cleaning device of claim 1, wherein the needle has a cylindrical fixing portion, a cylindrical head that is away from the fixing portion, and a connection between the fixing portion and the head. The diameter of the hitting head is smaller than the diameter of the fixing portion, and the connecting portion has a truncated cone shape, and has a first end connected to the fixing portion and a second end opposite to the first end, the first end The diameter is the same as the diameter of the fixing portion, and the second end is connected to the hitting head, and the diameter of the second end is smaller than the diameter of the fixing portion and greater than or equal to the diameter of the hitting head. The cleaning device of claim 1, further comprising a impact block, the impact bar of the impact member further having a third segment having a diameter smaller than a diameter of the second segment, the geometric center of the impact block being opened A third hole penetrating the impact block is disposed such that the impact block passes through the third segment to impact the second segment. The cleaning device of claim 6, further comprising a retaining member disposed at an end of the third segment away from the nozzle, the retaining member for preventing the impact block from being detached from the impact bar . The cleaning device of claim 1, wherein the material of the shot is copper.