TWI773454B - Injection molding machine with storage injection and cleaning functions - Google Patents

Abstract

An injection molding machine with the functions of material storage injection and material cleaning, including a feeding mechanism, a material injection mechanism, a material cleaning mechanism and a switching mechanism, the feeding mechanism pushes molten plastic through the switching mechanism, and then enters the material storage channel of the material injection mechanism Internally, heating is performed to increase the melting temperature, and then the ejection mechanism drives the ejection rod to extrude the molten plastic forward, so that the molten plastic passes through the switching part and the ejection nozzle to complete the ejection action, and finally the clearing mechanism drives the clearing rod to pass forward. The residual molten plastic is pushed forward and removed from the injection rod to avoid the coking phenomenon of the residual molten plastic due to continuous high temperature heating, which can ensure the quality and appearance of the injection molded object.

Description

Injection molding machine with storage injection and cleaning functions

The present invention relates to the field of injection molding machines, in particular to an injection molding machine with functions of material storage injection and material cleaning.

The current two-stage injection molding machine mainly includes a feeding mechanism, a shooting mechanism and a switching mechanism. When the switching mechanism is switched to the storage position, the feeding mechanism pushes the molten plastic through the switching mechanism, and then enters the storage of the shooting mechanism. Inside the channel, heating is performed to increase the melting temperature, and then the switching mechanism is controlled to switch to the injection position, and the injection mechanism is used to drive the injection rod to extrude the molten plastic forward, so that the molten plastic is injected into the mold through the switching part and the injection nozzle outwards. , to inject molded objects in one piece.

When the shooting mechanism drives the shooting rod to extrude the molten plastic forward for the shooting action, it controls the shooting rod to move backward and reset, but the shooting mechanism has molten plastic remaining in the storage channel and the feeding and discharging holes, and this When the residual molten plastic is continuously heated at high temperature, the residual molten plastic is prone to coking and other defects, and affects the quality and appearance of the injection molded object. Therefore, how to solve the above-mentioned problems is the topic that the industry-related industry is eager to study.

The main purpose of the present invention is that the shooting mechanism drives the shooting rod to carry out the shooting action Afterwards, use the cleaning rod to pass forward through the injection rod, and push the residual molten plastic forward to remove it, so as to avoid the coking phenomenon of the residual molten plastic due to continuous high temperature heating, which can ensure the quality of the injection-molded objects. Exterior.

In order to achieve the above-mentioned purpose, the injection molding machine with the functions of material storage injection and material cleaning of the present invention includes: a feeding mechanism for heating and conveying molten plastic to move toward the feeding hole; a material injection mechanism, including a material storage mechanism The material storage tube of the channel, a material injection rod movably inserted in the material storage channel towards the front, and a material injection driving cylinder with a material injection piston rod, the material injection rod is provided with a rearward opening channel, and the material injection rod The front end is provided with a through hole connected to the channel; a clearing mechanism includes a clearing rod movably inserted in the channel and the through hole of the shooting rod, and a clearing drive cylinder set inside the front end of the shooting piston rod , the clearing drive cylinder has a controlled clearing piston rod that protrudes forward; a switching mechanism, including a switching seat and a switching piece, the switching seat has a material injection hole inside, and a material feeding connected to the feeding mechanism The feeding channel of the hole, and a feeding and discharging channel connected to the front end of the material storage channel, the outlet of the injection channel is provided with a feeding nozzle, and the switching part is pivotally connected to the intersection of the injection channel, the feeding channel and the feeding and discharging channel, and the switching part It can be controlled to switch to the material storage position where the feeding hole is connected with the material inlet and outlet, and can be controlled to switch to the material injection position where the material injection hole is connected with the material inlet and outlet; , the feeding mechanism pushes the molten plastic through the feeding hole, the feeding hole, the switching piece and the feeding and discharging hole, so that the molten plastic enters the inside of the storage channel, heats up to increase the melting temperature, and pushes the ejection rod and the cleaning rod to move backwards The material storage state is formed; then the switch is controlled to switch to the injection position, and the injection piston rod of the injection drive cylinder is used to push the injection rod to move forward, so as to push the molten plastic in the storage channel forward through the inlet and outlet holes channel, switching parts and injection holes, so that the molten plastic completes the injection action through the injection nozzle; then the cleaning piston rod of the cleaning drive cylinder pushes the cleaning rod to move forward, so that the cleaning rod passes forward through the injection rod Through the hole, the molten plastic remaining in the inlet and outlet channels can be pushed forward and removed; finally, the cleaning drive cylinder drives the cleaning piston rod to move back and reset, and the cleaning rod moves backward and retreats to the injection rod.

In the above-mentioned injection molding machine with material storage injection and material cleaning functions, the cleaning rod is sleeved with a compression spring in the channel of the material injection rod, and the compression spring normally pushes back against the cleaning rod.

In the above-mentioned injection molding machine with material storage injection and material cleaning functions, the front end of the material cleaning driving cylinder is exposed on the injection piston rod, and the material injection piston rod drives the material cleaning driving cylinder to push the rear end of the material injection rod forward.

The above-mentioned injection molding machine with material storage injection and material cleaning functions, wherein the material cleaning piston rod extends forward into the channel of the material injection rod, the cleaning piston rod pushes the material cleaning rod and the compression spring forward, and the compression spring pushes the injection rod. The material rod reaches the front dead center.

In the above-mentioned injection molding machine with the functions of storage injection and material cleaning, the injection rod is provided with a blocking piece at the rear end of the channel, and the blocking piece is blocked at the rear end of the material clearing rod.

In the above-mentioned injection molding machine with the functions of material storage, injection and material cleaning, the switching element is provided with a first hole radially penetrating through it, and a second hole radially perpendicular to the first hole, so that the first hole and the second hole The channel constitutes a T-shaped channel.

In the above-mentioned injection molding machine with material storage injection and material cleaning functions, when the switching member is rotated to switch to the material storage position, one end of the first hole is connected to the feed hole of the switching seat, and the second hole is connected to the inlet and outlet holes. The other end of the first channel is closed at the switch seat.

In the above-mentioned injection molding machine with material storage, injection and material cleaning functions, when the switching member is rotated and switched to the injection position, both ends of the first hole are relatively connected to the injection hole and the inlet and outlet holes, and the second hole is closed at the switch. seat.

The above-mentioned injection molding machine with the functions of storage injection and material cleaning, wherein the material cleaning driving cylinder pushes the material cleaning piston rod and the material cleaning rod to move forward, so that the material cleaning rod passes through the inlet and outlet holes of the switching seat sequentially forward. , Both ends of the first hole, the injection hole and the injection nozzle, to push the residual molten plastic forward and remove it.

1: Feeding mechanism

11: Feeding tube

111: Feed port

112: Feeding hole

12: Screw

13: Drive

14: Connecting pipes

2: Injection mechanism

21: Pedestal

22: Storage tube

221: Storage channel

23: Shooting rod

231: Channel

232: Through hole

24: Shot drive cylinder

241: Injection piston rod

25: Stopper

3: Clearing mechanism

31: Clearing rod

311: Head

32: Clearing drive cylinder

321: Purge piston rod

33: Compression spring

4: Switching mechanism

41: switch seat

411: Injection channel

412: Feeding channel

413: inlet and outlet channels

42: Toggles

421: The first channel

422: Second channel

43: Injection nozzle

5: Molten Plastic

The first figure is a perspective view of the injection molding machine of the present invention.

The second figure is a cross-sectional view of the injection molding machine of the present invention performing the stocking action.

The third picture is an enlarged cross-sectional view of the injection mechanism, the cleaning mechanism and the switching mechanism of the injection molding machine in the second picture.

The fourth figure is an enlarged view of the switching mechanism of the third figure.

Fig. 5 is a cross-sectional view of the injection molding machine of the present invention during the shooting operation.

The sixth figure is an enlarged view of the switching mechanism of the fifth figure.

Fig. 7 is a cross-sectional view of the injection molding machine of the present invention performing the cleaning action.

Figure 8 is an enlarged view of the switching mechanism of Figure 7.

The ninth figure is a sectional view of the injection molding machine of the present invention performing the reset action in the cleaning mechanism.

In order to achieve the above-mentioned purpose of the present invention, the adopted technical means and their effects, a feasible embodiment is given hereby, and the description is as follows in conjunction with the drawings:

First of all, please refer to the first to sixth figures. It can be clearly seen from the figures that the injection molding machine of the present invention mainly has the functions of material storage, injection and cleaning. The injection molding machine includes a feeding mechanism 1, a material injection Mechanism 2, a clearing mechanism 3 and a switching mechanism 4, wherein:

The feeding mechanism 1 includes a feeding pipe 11 with a feeding port 111 and a feeding hole 112, a screw 12 inserted in the feeding pipe 11, and a driver 13 for driving the screw 12 to rotate, so as to convey heating and melting The plastic 5 moves towards the feed hole 112 and the connecting pipe 14 .

The shooting mechanism 2 includes a base 21 , a material storage tube 22 with a material storage channel 221 , a material injection rod 23 movably inserted forward in the material storage channel 221 , and a material injection piston rod 241 . The material injection driving cylinder 24, the material storage pipe 22 and the material injection driving cylinder 24 are respectively arranged at the front and rear ends of the base 21, the material injection rod 23 is axially provided with a rearward opening channel 231, and the front end of the material injection rod 23 is provided with a communication channel 231. The through hole 232 of the channel 231 (refer to Figures 3 and 6), and the ejector rod 23 is provided with a stopper 25 at the rear end of the channel 231 .

The clearing mechanism 3 includes a clearing rod 31 movably inserted in the channel 231 and the through hole 232 of the shooting rod 23 forward, and a clearing driving cylinder 32 set in the front end of the shooting piston rod 241, and The front end of the clearing drive cylinder 32 is exposed on the shooting piston rod 241 , and the clearing driving cylinder 32 has a controlled clearing piston rod 321 extending forward. The clearing rod 31 is sleeved in the channel 231 of the shooting rod 23 The spring 33 is compressed, and the compression spring 33 normally pushes back against the head 311 of the rear end of the cleaning rod 31 , and the blocking member 25 blocks the rear end of the head 311 of the cleaning rod 31 .

The switching mechanism 4 includes a switching seat 41 and a switching member 42. The switching seat 41 has a material injection hole 411 inside, a feeding hole 412 connected to the feeding mechanism 1 and the connecting pipe 14 relative to the feeding hole 112, and a continuous feeding hole 412. The feeding and discharging channel 413 leading to the front end of the material storage channel 221 is provided with a feeding nozzle 43 at the outlet of the feeding channel 411. A first channel 421 radially penetrates through the 42, and a second channel 422 whose one end is radially and vertically communicated with the first channel 421, so that the first channel 421 and the second channel 422 form a T-shaped channel, and the switching member 42 can be controlled by external Rotate and switch to the material storage position where the feeding channel 412 communicates with the feeding and discharging channel 413 (see Figures 2, 3 and 4), and can be controlled to switch to the feeding position where the feeding channel 411 communicates with the feeding and discharging channel 413 (see Figures 2, 3 and 4). Fifth and sixth figures).

When the injection molding machine of the present invention is in operation, as shown in the second, third and fourth figures, the switching member 42 is first controlled to rotate and switch to the material storage position, so that one end of the first hole 421 of the switching member 42 is communicated with the switch seat 41 The feeding channel 412 and the second channel 422 are connected to the feeding and discharging channel 413 , and the other end of the first channel 421 is closed at the switch seat 41 , so that the feeding mechanism 1 pushes the molten plastic 5 through the feeding hole 112 and the feeding channel 412 , The switching member 42 is opposite to the channel and the inlet and outlet channels 413, so that the molten plastic 5 is squeezed into the interior of the storage channel 221 to heat and increase the melting temperature, and the molten plastic 5 pushes the ejection rod 23 and the cleaning rod 31 to move backwards to form stock status.

Then, as shown in Figures 5 and 6, the switching member 42 is controlled to switch to the injection position, so that the front and rear ends of the first channel 421 of the switching member 42 are relatively connected to the injection channel 411 and the feeding and discharging channel 413, and the second channel 422 is closed. At the switch seat 41, use the injection drive The moving cylinder 24 pushes the ejection piston rod 241 and the cleaning drive cylinder 32, and the cleaning drive cylinder 32 pushes the rear end of the ejection rod 23 to move forward, so as to push the molten plastic 5 in the storage channel 221, so that the molten plastic 5 goes to the The molten plastic 5 is injected into the mold outward through the injection nozzle 43 through the inlet and outlet channels 413 , the first channel 421 of the switching member 42 and the injection channel 411 to complete the injection.

Then, as shown in Figures 7 and 8, the cleaning drive cylinder 32 pushes the cleaning piston rod 321 to extend forward into the channel 231 of the feeding rod 23, and the cleaning piston rod 321 pushes the cleaning rod 31 and the compression spring 33 forward. And the compression spring 33 pushes the ejection rod 23 to the front dead center, and the purge piston rod 321 continues to push the purge rod 31 to move forward, so that the purge rod 31 passes forward through the through hole 232 of the ejection rod 23, Pass through the inlet and outlet channels 413 of the switching seat 41, the two ends of the first channel 421, the injection channel 411 and the injection nozzle 43 in order to push forward the molten plastic 5 remaining in the storage channel 221 and the inlet and outlet channels 413. To avoid the coking phenomenon of the residual molten plastic 5 due to continuous high temperature heating, the quality and appearance of the injection molded object can be ensured.

Finally, as shown in the ninth figure, the clearing drive cylinder 32 drives the clearing piston rod 321 to move backward and reset, and the clearing rod 31 uses the elastic force of the compression spring 33 to push the clearing rod 31 back into the feeding rod 23. , you are ready to perform the stocking action shown in the second, third and fourth diagrams again.

The above-mentioned embodiments are only for the convenience of illustrating the present invention, and are not intended to be limiting. Without departing from the spirit of the present invention, various simple changes and modifications that can be made by those skilled in the industry should still be included in the following patent applications. in the range.

1: Feeding mechanism

11: Feeding tube

111: Feed port

112: Feeding hole

12: Screw

13: Drive

14: Connecting pipes

2: Injection mechanism

21: Pedestal

22: Storage tube

221: Storage channel

23: Shooting rod

231: Channel

24: Shot drive cylinder

241: Injection piston rod

25: Stopper

3: Clearing mechanism

31: Clearing rod

311: Head

32: Clearing drive cylinder

321: Purge piston rod

33: Compression spring

4: Switching mechanism

41: switch seat

42: Toggles

43: Injection nozzle

5: Molten Plastic

Claims (9)

An injection molding machine with storage injection and material cleaning functions, comprising: a feeding mechanism for heating and conveying the molten plastic to move towards the feeding hole; A material injection mechanism includes a material storage tube with a material storage channel, a material injection rod movably inserted in the material storage channel forward, and a material injection driving cylinder with a material injection piston rod. The interior of the material injection rod is A channel with an opening facing backward is provided, and the front end of the ejection rod is provided with a through hole communicating with the channel; A clearing mechanism includes a clearing rod movably inserted in the channel and the through hole of the shooting rod, and a clearing driving cylinder arranged inside the front end of the shooting piston rod. The clearing driving cylinder With a controlled forward extension of the purge piston rod; A switching mechanism includes a switching seat and a switching piece, the switching seat has a material injection hole inside, a feeding hole connected to the feeding hole of the feeding mechanism, and a feeding hole connected to the front end of the material storage channel In and out of the material channel, the outlet of the material injection channel is provided with a material injection nozzle, the switching member is pivotally connected to the intersection of the material injection channel, the feeding channel and the material inlet and outlet channel, and the switching member can be controlled to switch to the feeding channel The material storage position communicated with the material inlet and outlet channels, and can be controlled to switch to the material injection position communicated with the material injection holes and the material inlet and outlet channels; By the above, when the switching member is controlled to switch to the storage position, the feeding mechanism pushes the molten plastic through the feeding hole, the feeding hole, the switching member and the feeding and discharging hole, so that the molten plastic enters the Inside the material storage channel, heating is performed to increase the melting temperature, and the material injection rod and the material cleaning rod are pushed to move backward to form a material storage state; then control the The switching element is switched to the shooting position, and the shooting piston rod of the shooting driving cylinder is used to push the shooting rod to move forward, so as to push the molten plastic in the storage channel forward through the feeding and discharging hole. , the switching member and the material injection hole, so that the molten plastic can complete the injection action through the injection nozzle; then the material cleaning piston rod of the material cleaning driving cylinder pushes the material cleaning rod to move forward, so that the material cleaning rod Go forward through the through hole of the ejection rod to push forward the molten plastic remaining in the inlet and outlet channels to remove it; finally, the cleaning drive cylinder drives the cleaning piston rod to move back and reset, and the cleaning The material rod moves backward and retreats into the material injection rod. The injection molding machine with storage injection and material cleaning functions as described in item 1 of the patent application scope, wherein the cleaning rod is sleeved with a compression spring in the channel of the injection rod, and the compression spring is normally backward Push against the purge lever. The injection molding machine with storage injection and cleaning functions as described in item 2 of the patent application scope, wherein the front end of the cleaning driving cylinder is exposed on the injection piston rod, and the injection piston rod drives the cleaning driving cylinder Push the rear end of the shot rod forward. The injection molding machine with storage injection and material cleaning functions as described in item 2 of the scope of the patent application, wherein the cleaning piston rod extends forward into the channel of the injection rod, and the cleaning piston rod pushes the material forward The clearing rod and the compression spring push the shooting rod to the front dead center. The injection molding machine with storage injection and material cleaning functions as described in item 2 of the patent application scope, wherein the injection rod is provided with a stopper at the rear end of the passage, and the stopper blocks the rear of the material removal rod end. The injection molding machine with the functions of stocking injection and material cleaning as described in claim 1, wherein the switching member is radially provided with a first hole, and a second hole radially and perpendicularly connected to the first hole A channel, so that the first channel and the second channel form a T-shaped channel. The injection molding machine with storage injection and material cleaning functions as described in item 6 of the patent application scope, wherein when the switching member is rotated to switch to the storage position, one end of the first hole is connected to the feeding material of the switching seat A channel, the second channel is communicated with the inlet and outlet channels, and the other end of the first channel is closed at the switch seat. The injection molding machine with the functions of stock injection and material cleaning as described in item 7 of the patent application scope, wherein when the switching member is rotated to switch to the injection position, the two ends of the first hole are relatively connected to the injection hole and the injection hole. The inlet and outlet channels, and the second channel is closed on the switch seat. The injection molding machine with storage injection and cleaning functions as described in item 8 of the scope of the patent application, wherein the cleaning driving cylinder pushes the cleaning piston rod and the cleaning rod to move forward, so that the cleaning rod moves forward according to the Pass through the inlet and outlet channels of the switch seat, the two ends of the first channel, the injection channel and the injection nozzle in sequence forward, so as to push the residual molten plastic forward and remove it.

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