CN112388922A

CN112388922A - Injection molding machine with mutual cooperation of ejection and charging

Info

Publication number: CN112388922A
Application number: CN202011161179.0A
Authority: CN
Inventors: 陈明华
Original assignee: Suzhou Gienkee Plastics Technology Co ltd
Current assignee: Suzhou Gienkee Plastics Technology Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-02-23

Abstract

The invention discloses an injection molding machine with mutual cooperation of injection and feeding, which comprises a machine base, a charging barrel, a screw and a power system. On one hand, the main power output of the injection and the charging is the same output shaft, and the coordinated power output of the injection and the charging is realized under the switching of the corresponding clutch clutching state; on the other hand, under the cooperative output of the auxiliary servo motor, the utilization efficiency of the main servo motor and the auxiliary servo motor can be maximized, the operation in an injection molding state is favorably implemented, the rated output power of the selected motor can be reduced, and the manufacturing cost and the use cost of the injection molding machine are further reduced.

Description

Injection molding machine with mutual cooperation of ejection and charging

Technical Field

The invention belongs to the field of injection molding machines, and particularly relates to an injection molding machine with mutual cooperation of injection and charging.

Background

Injection molding machines, also known as injection molding machines or injection molding machines. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.

Specifically, the injection motion state mainly includes the following actions:

1) and injection: the injection motor drives the rotary screw rod to push the screw rod to advance;

2) and pressure maintaining: keeping the pressure intensity of the die cavity and the material pipe unchanged for a period of time, and continuously applying work by the injection motor;

3) and feeding materials: the feeding motor drives the screw to rotate (the screw can only rotate in one direction);

4) and loosening after loosening: the pressure of screw rod anterior segment can be bigger and bigger when feeding motor drives the screw rod rotation and produces the backpressure, needs ball to move backward at this moment and releases the backpressure, feeding motor and ejection motor simultaneous working this moment.

However, in most injection molding machines at present, the injection shaft and the feeding shaft are respectively controlled by a servo motor, wherein the injection motor drives the ball screw to rotate, the pushing screw advances and retreats, and the feeding motor drives the screw to rotate, generally, the output power of the injection motor is greater than that of the feeding motor, and in the whole injection process, the injection motor and the feeding motor do not work with the maximum torque force at the same time (that is, when the output power of the injection motor is the maximum, the feeding motor does not work with the maximum output at the same time, and vice versa), so, there are following obvious defects:

1) the two motors cannot cooperate with each other, so that the utilization efficiency of the motors is relatively low;

2) the servo motor has higher use specification and high price, so the manufacturing cost and the use cost are high.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an improved injection molding machine with mutual cooperation of injection and feeding.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

an injection molding machine with cooperative injection and charging, comprising:

a machine base;

the charging barrel comprises a barrel body and a nozzle, wherein the rear end part of the barrel body is connected to the base, a material cavity is formed in the barrel body, the nozzle is arranged at the front end part of the barrel body, and a plastic raw material inlet is formed in the barrel body;

the screw rod extends along the length direction of the charging barrel, the front end part of the screw rod is positioned in the barrel, and the rear end part of the screw rod extends into the machine base;

a power system for driving the screw rod to rotate around the axis of the screw rod or/and to move linearly along the length direction of the screw rod,

in particular, the power system comprises a sliding seat, an injection unit, a feeding unit and a power unit, wherein the sliding seat is arranged on the machine base in a manner of moving back and forth along the length direction of the screw rod, the power unit is provided with an output shaft parallel to the screw rod,

the ejection unit comprises a screw rod which is coaxial with the screw rod and is rotationally connected with the rear end part of the screw rod, an ejection power part which drives the screw rod to rotate so as to drive the sliding seat and the screw rod to synchronously move back and forth relative to the base, an ejection transmission part which is in transmission connection with the ejection power part and the output shaft, and a first clutch which is arranged on the output shaft and can relatively clutch the output shaft and the ejection transmission part;

the feeding unit comprises a feeding power part which is arranged at the rear part of the screw rod extending into the base and is coaxially connected with the screw rod, a feeding transmission part which is used for driving and connecting the feeding power part and the output shaft, and a second clutch which is arranged on the output shaft and can relatively clutch the output shaft and the feeding transmission part;

the power unit comprises a main servo motor and an auxiliary servo motor, wherein a first clutch and a second clutch are arranged on an output shaft of the main servo motor, and an output shaft of the auxiliary servo motor is in transmission connection with the ejection power part.

Preferably, the sliding seat is provided with a connecting shaft which rotates around the axis of the screw rod, the rear end part of the connecting shaft is fixed with the front end part of the screw rod, and the front end part of the connecting shaft is rotatably sleeved with the rear end part of the screw rod. Therefore, the axial leads of the connecting shaft, the screw rod and the screw rod are overlapped, so that the rotation and the linear motion of the screw rod are met, the unidirectional rotation and the linear motion of the screw rod are also met, and the implementation of the motion state of the injection molding machine is facilitated.

According to a specific implementation and preferred aspect of the invention, the injection power component is an injection power wheel fixedly sleeved on the connecting shaft, and the injection transmission component comprises an injection transmission wheel connected to the output shaft of the main servo motor through a first clutch and an injection transmission belt for transmission connection of the injection transmission wheel and the injection power wheel. The synchronous connection of the transmission belts is adopted, and the clutch is controlled to facilitate the movement requirement in the injection and charging states on the same output shaft, so that the injection action is implemented efficiently.

Preferably, an auxiliary output wheel is arranged on the output shaft of the auxiliary servo motor, and the auxiliary output wheel is positioned in the inner area of the injection transmission belt and is in transmission fit with the injection transmission belt or the injection power wheel. In this way, both the main servomotor and the auxiliary servomotor can be driven with maximum power to meet the power requirements of the injection process, regardless of the injection state or the charging state.

Specifically, the injection driving belt is an annular belt with tooth grooves formed on the inner wall, and the injection driving wheel, the injection power wheel and the auxiliary output wheel are all toothed belt wheels matched with the tooth grooves. Under the transmission of the cooperation of the toothed belt and the toothed belt wheel, the transmission efficiency and the transmission effect are in the best state.

According to a further embodiment and preferred aspect of the present invention, the power system further comprises an elastic member disposed between a rear end surface of the slider and an inner wall of a rear end of the housing, wherein the elastic member constantly maintains a movement tendency of the slider toward the cylinder. In this case, the elastic member can store and release energy, and particularly can provide instantaneous power during ejection, thereby improving the ejection effect.

Preferably, the rear end of the screw rod penetrates out of the base and is matched with a nut fixed on the base, wherein the screw rod and the nut form a ball screw, the elastic part is a spring, the spring is sleeved on the periphery of the screw rod, the rear end of the spring is sleeved on the nut, and the front end of the spring abuts against the rear end face of the sliding seat. On one hand, the ball screw structure ensures the stability of the screw movement; on the other hand, the spring for keeping the deformation state is more beneficial to the implementation of the injection process.

According to a specific implementation and preferred aspect of the invention, the feeding power component is a feeding power wheel fixedly sleeved on the screw, and the feeding transmission component comprises a feeding transmission wheel connected to the output shaft of the main servo motor through a second clutch and a feeding transmission belt for transmission connection of the feeding transmission wheel and the feeding power wheel. The synchronous connection of the transmission belts is adopted, and the clutch is controlled to facilitate the movement requirement in the injection and charging states on the same output shaft, so that the injection action is implemented efficiently.

Preferably, the feeding transmission belt is also an annular belt with tooth grooves formed on the inner wall, and the feeding transmission wheel and the feeding power wheel are also toothed belt wheels matched with the tooth grooves. Under the transmission of the cooperation of the toothed belt and the toothed belt wheel, the transmission efficiency and the transmission effect are in the best state.

In addition, the power system also comprises a supporting seat arranged on the sliding seat, and a one-way belt wheel which is arranged on the supporting seat and extends along the width direction of the feeding transmission belt by the axial lead, wherein the one-way belt wheel is tightly pressed on the outer side of the feeding transmission belt, and when in injection, the one-way belt wheel limits the movement of the feeding transmission belt so as to lead the feeding power wheel and the screw rod not to rotate.

Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:

on one hand, the main power output of the injection and the charging is the same output shaft, and the coordinated power output of the injection and the charging is realized under the switching of the corresponding clutch clutching state; on the other hand, under the cooperative output of the auxiliary servo motor, the utilization efficiency of the main servo motor and the auxiliary servo motor can be maximized, the operation in an injection molding state is favorably implemented, the rated output power of the selected motor can be reduced, and the manufacturing cost and the use cost of the injection molding machine are further reduced.

Drawings

FIG. 1 is a schematic structural view of an injection molding machine according to the present invention;

FIG. 2 is a schematic front view of FIG. 1;

FIG. 3 is a schematic top view of FIG. 1;

FIG. 4 is a schematic sectional view taken along line A-A in FIG. 3;

wherein: 1. a machine base;

2. a charging barrel; 20. a barrel; 21. a nozzle;

3. a screw;

4. a power system; 40. a slide base; 400. a connecting shaft; 41. an injection unit; 410. a screw rod; 411. an injection power unit; 412. an injection transmission member; a. ejecting a driving wheel; b. injecting the transmission belt; 413. a first clutch; 414. a nut; 42. a feeding unit; 420. a charging power component; 421. a charging transmission component; c. a feeding driving wheel; d. a feeding transmission belt; 422. a second clutch; 43. a power unit; 430. a main servo motor; 431. an auxiliary servo motor; s1, s2, output shaft; f. an auxiliary output wheel; 44. an elastic member; 45. a supporting seat; 46. a one-way belt wheel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, the injection molding machine with the injection and the feeding cooperating with each other of the present embodiment includes a machine base 1, a barrel 2, a screw 3, and a power system 4.

Referring to fig. 2, the charging barrel 2 includes a barrel 20 having a rear end connected to the frame 1 and an inner cavity, and a nozzle 21 disposed at a front end of the barrel 20, wherein the barrel 20 is provided with a plastic material inlet.

The screw 3 extends along the length direction of the barrel 2, and has a front end part located in the barrel 20 and a rear end part extending into the housing 1.

The power system 4 is used for driving the screw rod 3 to rotate around the axis of the screw rod or/and to move linearly along the length direction of the screw rod.

Referring to fig. 3, the power system 4 includes a slide 40 disposed on the base 1 to move back and forth along the length direction of the screw 3, an injection unit 41, a feeding unit 42, a power unit 43 having an output shaft parallel to the screw 3, an elastic member 44 disposed between the rear end surface of the slide 40 and the inner wall of the rear end of the base 1, and a support seat 45 and a one-way pulley 46 disposed on the slide 40, wherein the power unit 43 includes a main servomotor 430 and an auxiliary servomotor 431.

In this embodiment, the slide 40 is provided with a connecting shaft 400 (connected by a rotary bearing) rotating around the axis of the screw 3, and the injection unit 41 includes a screw 410 coaxial with the screw 3 via the connecting shaft 400 and rotatably connected to the rear end of the screw 3, an injection power member 411 driving the screw 410 to rotate so as to move the slide 40 and the screw 410 back and forth synchronously with respect to the housing 1, an injection transmission member 412 drivingly connecting the injection power member 411 and an output shaft s1 of the main servo motor 430, and a first clutch 413 provided on the output shaft s1 and capable of relatively engaging and disengaging the output shaft s1 and the injection transmission member 412.

As shown in fig. 4, the rear end of the connecting shaft 400 is fixed to the front end of the screw 410, and the front end of the connecting shaft 400 is rotatably fitted to the rear end of the screw 3. Therefore, the axial leads of the connecting shaft, the screw rod and the screw rod are overlapped, so that the rotation and the linear motion of the screw rod are met, and the unidirectional rotation and the linear motion of the rockers are met, thereby facilitating the implementation of the motion state of the injection molding machine.

The injection power member 411 is an injection power wheel fixedly fitted to the connecting shaft 400, and the injection transmission member 412 includes an injection transmission wheel a connected to the output shaft s1 of the main servomotor 430 via the first clutch 413, and an injection transmission belt b for drivingly connecting the injection transmission wheel a and the injection power wheel (the injection power member 411). The synchronous connection of the transmission belts is adopted, and the clutch is controlled to facilitate the movement requirement in the injection and charging states on the same output shaft, so that the injection action is implemented efficiently.

The feeding unit 42 comprises a feeding power component 420 which is arranged at the rear part of the screw rod 3 extending into the machine base 1 and is coaxially connected with the screw rod 3, a feeding transmission component 421 which is used for driving and connecting the feeding power component 420 with the output shaft s1, and a second clutch 422 which is arranged on the output shaft s1 and can oppositely clutch the output shaft s1 and the feeding transmission component 421.

The first clutch 413 and the second clutch 422 are provided on the output shaft s1 of the main servomotor 430, that is, the injection transmission member 412 and the charge transmission member 421 are coaxial, and therefore, it suffices to say that the injection and the charge share one main servomotor 430. As far as the clutch itself is a direct outsourced product, it is clear that it is not described in detail here how the clutch is implemented, but it is also possible to implement it.

The output shaft s2 of the auxiliary servomotor 431 is drivingly connected to the injection power member 411.

Specifically, an auxiliary output wheel f is provided on the output shaft s2 of the auxiliary servomotor 431, and the auxiliary output wheel f is located in the inner region of the injection driving belt b and is in driving engagement with the injection driving belt b. In this way, both the main servomotor and the auxiliary servomotor can be driven with maximum power to meet the power requirements of the injection process, regardless of the injection state or the charging state.

In this example, the injection driving belt b is an endless belt having a tooth groove formed in an inner wall thereof (the tooth groove is omitted for clarity), and the injection driving wheel a, the injection power wheel (the injection power member 411), and the auxiliary output wheel f are toothed pulleys each matching the tooth groove. Under the transmission of the cooperation of the toothed belt and the toothed belt wheel, the transmission efficiency and the transmission effect are in the best state.

In this example, the feeding power unit 420 is a feeding power wheel fixedly sleeved on the screw 3, and the feeding transmission unit 421 includes a feeding transmission wheel c connected to the output shaft s1 of the main servo motor through a second clutch 422, and a feeding transmission belt d for transmission-connecting the feeding transmission wheel c and the feeding power wheel (feeding power unit 420). The synchronous connection of the transmission belts is adopted, and the clutch is controlled to facilitate the movement requirement in the injection and charging states on the same output shaft, so that the injection action is implemented efficiently.

Specifically, the feeding transmission belt d is also an annular belt with a tooth socket formed on the inner wall, and the feeding transmission wheel c and the feeding power wheel (feeding power component 420) are also toothed belt wheels matched with the tooth socket. Under the transmission of the cooperation of the toothed belt and the toothed belt wheel, the transmission efficiency and the transmission effect are in the best state.

The elastic member 44 keeps the movement tendency of the slider 40 toward the cylinder 20. In this case, the elastic member can store and release energy, and particularly can provide instantaneous power during ejection, thereby improving the ejection effect.

The rear end of the screw 410 penetrates out of the base 1 and is matched with a nut 414 fixed on the base 1, wherein the screw 410 and the nut 414 form a ball screw. The ball screw structure ensures the stability of the screw motion.

The elastic component 44 is a spring, which is sleeved on the periphery of the screw 410, and the rear end of the spring is sleeved on the nut 414, and the front end of the spring abuts against the rear end face of the sliding base 1. The spring which keeps the deformation state is more beneficial to providing instant power during the ejection.

Further, the one-way pulley 46 is provided on the support base 45 and the axis line extends in the width direction of the charging belt d, wherein the one-way pulley 46 is pressed against the outside of the charging belt d, and the one-way pulley 46 restricts the movement of the charging belt d so that the charging power wheel (charging power member 420) and the screw 3 do not rotate when injecting.

In summary, the injection process of the present embodiment has the following motion states:

and (3) injection: the main servomotor 430, the auxiliary servomotor 431 and the spring (elastic component 44) output force together, the first clutch 413 is in an on state, the second clutch 422 is in an off state, at this time, the output shaft s1 and the output shaft s2 drive the injection power wheel (injection power component 411) to rotate at the same time, namely, the rotation of the screw 410, and the cooperation of the ball screw is used for realizing the forward movement (towards the barrel 2) of the slide 40, and at the same time, the feeding transmission belt d is kept still by the non-return of the one-way belt pulley 46 (keeping the feeding power component 420 and the screw to be not rotated), and under the elastic force provided by the spring, the slide 40, the screw 410 and the screw 3 advance synchronously;

pressure maintaining: on the basis of the injection, the main servo motor 430, the auxiliary servo motor 431 and the spring (elastic component 44) exert force together to maintain a certain pressure;

feeding: the first clutch 413 is in a disengaged state, the second clutch 422 is in an engaged state, at this time, the output shaft s1 drives the feeding power component 420 and the screw rod 3 to rotate, at this time, the spring (elastic component 44) always has pressure on the screw rod 3, and the pressure is greater than a set back pressure value, and the force needs to be overcome to normally continue the feeding action, at this time, the force is provided by the output shaft s2 of the auxiliary servo motor 431, so that under the drive of the output shaft s2, the injection power wheel (injection power component 411) and the screw rod 410 synchronously rotate and drive the sliding seat 40 to slowly retreat, and the spring (elastic component 44) is further compressed to store energy;

after loosening (tape casting): on the basis of feeding, the auxiliary servo motor 431 drives the injection power wheel (the injection power part 411) and the screw rod 410 to synchronously rotate and drive the sliding seat 40 and the screw rod to continuously retreat, and the molten glue can be prevented from flowing back to the die by retreating for a short distance.

Therefore, the gist of the invention of the present embodiment is: by using the clutch, it is possible to achieve a common motor for both injection and charging, thereby reducing the size of the servo motor (e.g. 20kw for the original injection motor and 12kw for the charging motor, now only one 12kw and one 4kw servo motor is needed, so the power required for injection: main servo motor + auxiliary servo motor + stored spring =12+4+4=20 kw).

In summary, the present embodiment has the following advantages:

1) on one hand, the main power output of the injection and the charging is the same output shaft, and the coordinated power output of the injection and the charging is realized under the switching of the corresponding clutch state; on the other hand, under the cooperative output of the auxiliary servo motor, the utilization efficiency of the main servo motor and the auxiliary servo motor can be maximized, thereby being beneficial to implementing the operation of an injection molding state and reducing the rated output power of the selected motor, and further reducing the manufacturing cost and the use cost of the injection molding machine;

2) the structure is simple, the implementation is convenient, and each state is stable in operation.

The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.

Claims

1. An injection molding machine with cooperative injection and charging, comprising:

a machine base;

the method is characterized in that:

the power system comprises a sliding seat, an injection unit, a feeding unit and a power unit, wherein the sliding seat is arranged on the machine base in a manner of moving back and forth along the length direction of the screw rod, the power unit is provided with an output shaft parallel to the screw rod,

the feeding unit comprises a feeding power part which is arranged at the rear part of the base, into which the screw rod extends, and is coaxially connected with the screw rod, a feeding transmission part which is used for driving and connecting the feeding power part and the output shaft, and a second clutch which is arranged on the output shaft and can relatively clutch the output shaft and the feeding transmission part;

the power unit comprises a main servo motor and an auxiliary servo motor, wherein the first clutch and the second clutch are arranged on an output shaft of the main servo motor, and the output shaft of the auxiliary servo motor is in transmission connection with the ejection power component.

2. An injection molding machine with cooperative injection and injection of claim 1, wherein: the sliding seat is provided with a connecting shaft rotating around the axis of the screw rod, the rear end part of the connecting shaft is fixed with the front end part of the screw rod, and the front end part of the connecting shaft is rotatably sleeved with the rear end part of the screw rod.

3. An injection molding machine with co-operating injection and feed as claimed in claim 2, wherein: the ejection power component is an ejection power wheel fixedly sleeved on the connecting shaft, and the ejection transmission component comprises an ejection transmission wheel connected to an output shaft of the main servo motor through the first clutch and an ejection transmission belt for driving and connecting the ejection transmission wheel and the ejection power wheel.

4. An injection molding machine with co-operating injection and feed as claimed in claim 3, wherein: and an auxiliary output wheel is arranged on an output shaft of the auxiliary servo motor, is positioned in the inner area of the injection driving belt and is in transmission fit with the injection driving belt or the injection power wheel.

5. An injection molding machine with co-operating injection and feed as claimed in claim 4, wherein: the injection driving belt is an annular belt with tooth grooves formed on the inner wall, and the injection driving wheel, the injection power wheel and the auxiliary output wheel are all toothed belt wheels matched with the tooth grooves.

6. An injection molding machine with cooperative injection and injection of claim 1, wherein: the power system also comprises an elastic component arranged between the rear end surface of the sliding seat and the inner wall of the rear end of the machine base, wherein the elastic component always keeps the movement trend of the sliding seat towards the cylinder body.

7. An injection molding machine with co-operating injection and feed as claimed in claim 6, wherein: the lead screw rear end portion is worn out the frame, and through fixing nut on the frame cooperatees, wherein the lead screw with the nut constitutes ball, elastomeric element be the spring, the spring housing is established the periphery of lead screw, just the back tip cover of spring is established conflict on the nut, preceding tip on the rear end face of slide.

8. An injection molding machine with cooperative injection and injection of claim 1, wherein: the feeding power component is a feeding power wheel fixedly sleeved on the screw rod, and the feeding transmission component comprises a feeding transmission wheel connected to an output shaft of the main servo motor through the second clutch and a feeding transmission belt in transmission connection with the feeding transmission wheel and the feeding power wheel.

9. An injection molding machine with co-operating injection and feed as claimed in claim 8, wherein: the feeding transmission belt is also an annular belt with tooth grooves formed on the inner wall, and the feeding transmission wheel and the feeding power wheel are also tooth-shaped belt wheels matched with the tooth grooves.

10. An injection molding machine with co-operation of injection and injection as claimed in claim 8 or 9, characterized in that: the power system also comprises a supporting seat arranged on the sliding seat, and a one-way belt wheel which is arranged on the supporting seat and extends along the width direction of the feeding transmission belt, wherein the one-way belt wheel is tightly pressed on the outer side of the feeding transmission belt, and when in injection, the one-way belt wheel limits the movement of the feeding transmission belt so as to cause the feeding power wheel and the screw rod not to rotate.