Full-electric and ejection injection molding machine

Abstract

The present invention relates to a fully electric and ejection type injection molding machine, which comprises a machine base, a barrel, a screw, a pressure sensor, and a power system. The power system includes a transmission lead screw, a transmission nut sleeve, a feeding power unit, an injection power unit, and an ejection power telescopic rod. The center lines of the transmission nut sleeve, the transmission lead screw, and the screw coincide with each other, and the transmission nut sleeve is synchronously connected to the rear end of the screw from the front end. The telescopic direction of the ejection power telescopic rod is parallel to the length direction of the screw. When feeding materials, the present invention can realize the synchronous cooperation of the injection motor and the feeding motor, improve the utilization efficiency of the motor, and reduce the specification of the feeding motor. At the same time, through the energy release of the ejection power telescopic rod to cooperate with injection, the specification of the injection motor is reduced. Therefore, the requirements for motor selection are greatly reduced, and the manufacturing cost and usage cost are reduced.

Description

Technical Field

[0001] The present invention belongs to the field of injection molding machines, and particularly relates to a fully electric and ejection type injection molding machine. Background Art

[0002] Currently, the fully electric injection molding machine has the following working states:

[0003] Injection: The injection motor drives the rotating screw rod to push the screw forward;

[0004] Holding pressure: Keep the pressure in the mold cavity and the barrel unchanged for a period of time, and at this time the injection motor continues to do work;

[0005] Feeding: The feeding motor drives the screw to rotate (the screw can only rotate in one direction), and when the feeding motor drives the screw to rotate, the pressure at the front end of the screw will become larger and larger to generate back pressure. At this time, the transmission screw rod needs to move backward to release the back pressure. At this time, the feeding motor and the injection motor work simultaneously;

[0006] Rear loosening (anti - dripping): After the feeding action is completed, in order to prevent the molten plastic from overflowing, the injection screw needs to retreat a certain displacement.

[0007] However, for the vast majority of injection molding machines, the injection shaft and the feeding shaft are each controlled by a servo motor. The injection motor drives the transmission screw rod to rotate through an injection belt to push the screw forward and backward; during feeding, the feeding motor drives the screw to rotate. In this way, injection and feeding each require a servo motor (generally, the injection servo motor is larger than the feeding servo motor). During the entire injection process, they do not simultaneously output the maximum torque to do work (that is, when the injection motor outputs the maximum power, the feeding motor will not simultaneously output the maximum power, and vice versa). Therefore, the utilization efficiency of the motor is relatively low. As a result, not only does the selection and matching of servo motors increase the cost of the injection molding machine, but also the low utilization rate of servo motors causes high injection costs. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved fully electric and ejection type injection molding machine.

[0009] To solve the above - mentioned technical problem, the technical solution adopted by the present invention is as follows:

[0010] A fully electric and ejection type injection molding machine, which includes:

[0011] A machine base;

[0012] A barrel, which includes a barrel body with a material cavity formed inside, and a nozzle provided at the front end of the barrel body, wherein a plastic raw material inlet is provided on the barrel body;

[0013] A screw, which extends along the length direction of the barrel and extends into the machine base from the rear end;

[0014] Pressure sensor;

[0015] Power system, which is used to drive the screw to rotate around its own axis or / and move linearly along its own length direction,

[0016] In particular, the power system includes a transmission lead screw located behind the screw and with its rear end passing through the machine base, a transmission nut threadedly engaged with the transmission lead screw, a feeding power device for driving or restricting the rotation of the transmission nut, an injection power device for driving the transmission lead screw to rotate around its own axis, and an ejection power telescopic rod that moves synchronously with the transmission nut and has energy storage and energy release modes. The center lines of the transmission nut, the transmission lead screw, and the screw coincide, and the transmission nut is synchronously connected to the rear end of the screw from the front end. The telescopic direction of the ejection power telescopic rod is parallel to the length direction of the screw.

[0017] Preferably, a positioning seat is formed on the machine base. Inside the positioning seat, a first hole and a second hole that are connected and form a stepped hole are formed. The aperture of the first hole is larger than that of the second hole, and the first hole is located at the front end of the second hole. The transmission lead screw passes through the first hole and the second hole in sequence and then passes through the rear end of the machine base, and the transmission lead screw is rotatably connected to the inner wall of the second hole through a bearing. The transmission nut moves linearly or rotates in the first hole. Through the setting of the positioning seat, the assembly of the relative movement of the transmission nut and the transmission lead screw is realized, and the structural layout is compact and convenient to implement.

[0018] According to a specific implementation and preferred aspect of the present invention, a chute extending along its own length direction is formed on the outer circumference of the transmission nut. The power system includes a sliding collar sleeved on the outer circumference of the transmission nut and with a sliding groove matching the chute formed inside, and a rotating bearing that rotatably connects the sliding collar to the inner wall of the first hole. The feeding power device is used to drive the sliding collar to rotate. Here, when the transmission nut needs to move linearly and cannot rotate, it is only necessary to restrict the rotation of the sliding collar. At this time, the transmission nut moves linearly along the length direction of the chute; when the transmission nut needs to be driven to rotate, the slippage between the sliding collar and the transmission nut is avoided.

[0019] Preferably, there are multiple chutes, and they are circumferentially distributed around the transmission nut, and each chute communicates with the outside from the rear end. The multiple chutes have the best limiting and guiding effects to meet the needs of different injection molding states. At the same time, the chutes communicate with the outside from the rear end to facilitate the assembly of the sliding collar and the transmission nut.

[0020] Preferably, the feeding power device includes a feeding transmission shaft fixedly connected to the sliding collar and sleeved on the outer circumference of the transmission nut, a feeding wheel disc arranged on the feeding transmission shaft, a feeding motor with an output shaft parallel to the transmission nut, and a feeding transmission member that drives and connects the feeding motor and the feeding wheel disc.

[0021] Furthermore, the sliding collar is located at the front end of the positioning seat. The feeding transmission member includes a feeding transmission pulley disposed at the end of the output shaft and a feeding transmission belt for drivingly connecting the feeding transmission pulley and the feeding pulley. Belt-wheel transmission is adopted to achieve the power output for feeding.

[0022] According to another specific implementation and preferred aspect of the present invention, there are at least two elastic ejection telescopic rods, which are evenly distributed around the center of the feeding pulley on the outer periphery of the screw. The power system includes a connecting seat plate that fixedly connects two or more elastic ejection telescopic rods. The rear end of the screw penetrates through the connecting seat plate and is engaged with the transmission nut sleeve. When the screw moves forward and backward, the elastic ejection telescopic rods synchronously expand and contract for energy release and energy storage; when the screw rotates, the feeding pulley and the elastic ejection telescopic rods rotate synchronously. In this way, multiple elastic ejection telescopic rods can move synchronously to drive the forward or backward movement of the screw. At the same time, with the synchronous rotation of the elastic ejection telescopic rods along with the feeding pulley, especially during the feeding process, the transmission nut sleeve retreats while rotating, and the elastic ejection telescopic rods store energy.

[0023] Specifically, the elastic ejection telescopic rod is a nitrogen spring.

[0024] Preferably, a rotating joint is provided on the connecting seat plate. The rear end of the screw is fixedly connected to the front end of the rotating joint, and the front end of the transmission nut sleeve is fixedly connected to the rear of the rotating joint. An avoidance cavity is formed in the rotating joint. When the transmission nut sleeve moves linearly backward relative to the transmission screw rod, the front end of the transmission screw rod moves into the avoidance cavity.

[0025] Preferably, the pressure sensor is disposed between the rear end of the positioning seat and the machine base.

[0026] In addition, the injection power device includes an injection wheel disposed at the rear end of the transmission screw rod, an injection motor whose output shaft is parallel to the transmission screw rod, and an injection transmission member that drivingly connects the injection motor and the injection wheel.

[0027] In summary, the injection working state of the injection molding machine in this application is as follows:

[0028] Injection: The injection motor and the nitrogen spring work together. At this time, the feeding motor brakes so that the transmission nut cannot rotate. The injection motor drives the transmission screw rod to rotate clockwise, causing the transmission nut to move forward (i.e., the screw moves forward);

[0029] Pressure holding: The injection motor and the nitrogen spring work together to maintain a certain pressure;

[0030] Feeding:

[0031] State (1): The injection motor drives the transmission screw rod to rotate counterclockwise at a speed of N1, and the feeding motor drives the transmission nut to rotate at a speed of N2, where N1 = N2. The screw rod and the nut rotate in place for feeding;

[0032] State (2): When the feeding reaches a certain stage, back pressure is generated. At this time, the rotational speed of the driving lead screw is increased, N1 > N2, the nut retreats, and the nitrogen spring stores energy.

[0033] Repeat state (1) and state (2) to achieve feeding and energy storage of the nitrogen spring.

[0034] Rear relaxation (anti - drooling): The feeding motor brakes, the injection motor rotates counterclockwise, overcoming the spring force to make the driving nut retreat.

[0035] Before the start of the next injection action, the injection motor is braked and stopped.

[0036] Due to the implementation of the above - mentioned technical solutions, the present invention has the following advantages compared with the prior art:

[0037] When the present invention is feeding, it can achieve the synchronous cooperation of the injection motor and the feeding motor, improve the utilization efficiency of the motor, and reduce the specification of the feeding motor; at the same time, through the energy release of the elastic - ejection telescopic rod to cooperate with injection, the specification of the injection motor is reduced. Therefore, the requirements for motor selection are greatly reduced, and the manufacturing cost and usage cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic structural diagram of the all - electric and elastic - ejection injection molding machine of the present invention (before injection);

[0039] Figure 2 It is Figure 1 the front - view schematic diagram of

[0040] Figure 3 It is Figure 1 the top - view schematic diagram of

[0041] Figure 4 It is Figure 3 the sectional view taken along the line A - A in

[0042] Figure 5 It is a schematic structural diagram of the all - electric and elastic - ejection injection molding machine of the present invention (after injection);

[0043] Figure 6 It is Figure 5 the front - view schematic diagram of

[0044] Figure 7 It is Figure 5 the top - view schematic diagram of

[0045] Figure 8 It is Figure 7 the sectional view taken along the line B - B in

[0046] Wherein: 1. Machine base; 1a. Front seat plate; 1b. Rear seat plate; 1c. Left seat plate; 1d. Right seat plate;

[0047] 2. Barrel; 20. Cylinder body; 21. Nozzle; 20a. Plastic raw material inlet;

[0048] 3. Screw;

[0049] 4. Pressure sensor;

[0050] D. Power system; 6. Positioning seat; 6a. First hole; 6b. Second hole; 7. Transmission lead screw; 8. Transmission nut; 80. Chute; 9. Feeding power device; 90. Feeding transmission shaft; 91. Feeding wheel disc; 92. Feeding motor; 93. Feeding transmission part; 930. Feeding transmission wheel disc; 931. Feeding transmission belt; 10. Injection power device; 100. Injection wheel disc; 101. Injection motor; 102. Injection transmission part; a. Driving wheel disc; b. Injection transmission belt; 11. Ejection power telescopic rod; 12. Bearing; 13. Sliding collar; 14. Connecting seat plate; 15. Rotating joint; 150. Avoidance cavity; z. Rotating bearing. Detailed implementation manners

[0051] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0056] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0057] As Figure 1 and Figure 2 As shown in the figure, the fully electric and ejectable injection molding machine of this embodiment includes a machine base 1, a barrel 2, a screw 3, a pressure sensor 4 and a power system D.

[0058] Specifically, the machine base 1 includes a front seat plate 1a and a rear seat plate 1b that enclose a rectangular area and are located at the front and rear ends, and a left seat plate 1c and a right seat plate 1d that are located on the left and right sides.

[0059] The barrel 2 is fixed to the front seat plate 1a from the rear end.

[0060] Specifically, the barrel 2 includes a barrel body 20 with a material cavity formed inside, and a nozzle 21 provided at the front end of the barrel body 20, and a plastic raw material inlet 20a is provided on the barrel body 20.

[0061] Combined with Figure 3 As shown in the figure, the screw 3 extends along the length direction of the barrel 2 and extends into the rectangular area from the rear end.

[0062] A positioning seat 6 is formed on the machine base 1, and the pressure sensor 4 is located between the positioning seat 6 and the rear seat plate 11.

[0063] A power system D is used to drive the screw 3 to rotate around its own axis and / or move linearly along its own length direction.

[0064] Combined Figure 4 As shown, the power system D includes a transmission screw rod 7 located behind the screw 3 and having its rear end passing through the machine base 1, a transmission nut 8 threadedly engaged with the transmission screw rod 7, a feeding power unit 9 for driving or restricting the rotation of the transmission nut 8, an injection power unit 10 for driving the transmission screw rod 7 to rotate around its own axis, and an ejection power telescopic rod 11 that moves synchronously with the transmission nut 8 and has energy storage and energy release modes. The center lines of the transmission nut 8, the transmission screw rod 7, and the screw 3 coincide, and the transmission nut 8 is synchronously connected to the rear end of the screw 3 from the front end. The telescopic direction of the ejection power telescopic rod 11 is parallel to the length direction of the screw 3.

[0065] Specifically, a first hole 6a and a second hole 6b that are connected and form a stepped hole are formed inside the positioning seat 6. The aperture of the first hole 6a is larger than that of the second hole 6b, and the first hole 6a is located at the front end of the second hole 6b.

[0066] The transmission screw rod 7 passes through the first hole 6a and the second hole 6b in sequence and then passes through the rear seat plate 1b, and the transmission screw rod 7 is rotationally connected to the inner wall of the second hole 6b through a bearing 12.

[0067] The transmission nut 8 moves linearly or rotates in the first hole 6a. Through the setting of the positioning seat, the assembly of the relative movement between the transmission nut and the transmission screw rod is realized, and the structural layout is compact and convenient to implement.

[0068] In this example, the transmission screw rod 7 and the transmission nut 8 form a ball screw.

[0069] At the same time, a chute 80 extending along its own length direction is formed on the outer periphery of the transmission nut 8. The power system D includes a sliding collar 13 sleeved on the outer periphery of the transmission nut 8 and having a sliding sleeve ring 13 formed inside that matches the chute 80, and a rotating bearing z that rotatably connects the sliding collar 13 to the inner wall of the first hole 6a. The feeding power unit 9 is used to drive the sliding collar 13 to rotate. Here, when the transmission nut needs to move linearly and cannot rotate, as long as the rotation of the sliding collar is restricted, at this time, the transmission nut moves linearly along the length direction of the chute; when it is necessary to drive the transmission nut to rotate, slipping between the sliding collar and the transmission nut is avoided.

[0070] Specifically, the rotating bearing z is a commonly used cam bearing.

[0071] In this example, there are more than 80 sliding grooves, which are circumferentially distributed around the transmission sleeve 8. Each sliding groove 80 communicates with the outside from its rear end. The limiting and guiding effects of multiple sliding grooves are the best to meet the needs of different injection molding states. At the same time, the sliding grooves communicate with the outside from the rear end to facilitate the assembly of the sliding collar and the transmission sleeve.

[0072] Specifically, the sliding collar 13 is located at the front end of the first hole 6a and is installed in the first hole 6a through a sealing sleeve. At this time, not only the installation should be considered, but also the closer to the front, the more convenient it is to install the feeding power unit 9.

[0073] The feeding power unit 9 includes a feeding transmission shaft 90 fixedly connected to the sliding collar 13 and sleeved on the outer periphery of the transmission sleeve 8, a feeding wheel disc 91 arranged on the feeding transmission shaft 90, a feeding motor 92 with an output shaft parallel to the transmission sleeve 8, and a feeding transmission member 93 that drives and connects the feeding motor 92 and the feeding wheel disc 91.

[0074] The feeding transmission member 93 includes a feeding transmission wheel disc 930 arranged at the end of the output shaft and a feeding transmission belt 931 for driving and connecting the feeding transmission wheel disc 930 and the feeding wheel disc 91. Belt-wheel transmission is adopted to realize the power output of feeding.

[0075] There are two ejection power telescopic rods 11, which are evenly distributed around the center of the feeding wheel disc 91 on the outer periphery of the screw 3. The power system includes a connecting seat plate 14 that fixedly connects the two ejection power telescopic rods 11. The rear end of the screw 3 passes through the connecting seat plate 14 and is connected to the transmission sleeve 8. When the screw 3 moves forward and backward, the ejection power telescopic rods 11 synchronously expand and contract for energy release and energy storage; when the screw rotates, the feeding wheel disc and the ejection power telescopic rods rotate synchronously. In this way, multiple ejection power telescopic rods can move synchronously to drive the forward or backward movement of the screw. At the same time, through the synchronous rotation of the ejection power telescopic rods with the feeding wheel disc, especially during the feeding process, the transmission sleeve retreats in a rotating state, and the ejection power telescopic rods store energy.

[0076] Specifically, the ejection power telescopic rod 11 is a nitrogen spring.

[0077] At the same time, a rotating joint 15 is provided on the connecting seat plate 14. The rear end of the screw 3 is fixedly connected to the front end of the rotating joint 15, and the front end of the transmission sleeve 8 is fixedly connected behind the rotating joint 15. An avoidance cavity 150 is formed in the rotating joint 15. When the transmission sleeve 8 moves linearly backward relative to the transmission screw 7, the front end of the transmission screw 7 moves into the avoidance cavity.

[0078] The injection actuator 10 includes an injection wheel disc 100 fixed to the rear end of the transmission lead screw 7, an injection motor 101 with an output shaft parallel to the transmission lead screw 7, and an injection transmission member 102 that drives and connects the injection motor 101 to the injection wheel disc 100.

[0079] Specifically, the injection transmission member 102 includes an injection drive wheel disc a fixed to the drive shaft of the injection motor 101 and an injection transmission belt b for driving and connecting the injection drive wheel disc a and the injection wheel disc 100. Belt-wheel transmission is adopted to achieve the power output of injection.

[0080] Combined Figures 5 to 8 As described above, the injection molding working state of this embodiment is as follows:

[0081] Injection: The injection motor and the nitrogen spring work together. At this time, the feeding motor brakes to prevent the transmission nut from rotating. The injection motor drives the transmission lead screw to rotate clockwise, causing the transmission nut to move forward (i.e., the screw rod moves forward);

[0082] Holding pressure: The injection motor and the nitrogen spring work together to maintain a certain pressure;

[0083] Feeding:

[0084] State (1): The injection motor drives the transmission lead screw to rotate counterclockwise at a speed of N1, and the feeding motor drives the transmission nut to rotate at a speed of N2, where N1 = N2. The lead screw and the nut rotate in place for feeding;

[0085] State (2): When a back pressure is generated during feeding in State (1) at a certain stage, the rotational speed of the transmission lead screw is increased to N1 > N2, and the nut moves backward while the nitrogen spring stores energy;

[0086] States (1) and (2) are repeated to achieve feeding and energy storage of the nitrogen spring;

[0087] Post-loosening (anti-dripping): The feeding motor brakes, and the injection motor rotates counterclockwise to overcome the spring force and make the transmission nut move backward;

[0088] Before the next injection action starts, the injection motor brakes.

[0089] Therefore, the injection molding machine of this embodiment has the following advantages:

[0090] 1) Through structural improvement, the utilization of the injection motor is maximized. Especially during feeding, the injection motor and the feeding motor can cooperate synchronously, improving the utilization efficiency of the injection motor and reducing the specification of the feeding motor;

[0091] 2) By releasing the energy of the nitrogen spring to cooperate with the power output of the injection motor, the specification of the injection motor is reduced;

[0092] 3), The specifications of the feeding motor and the injection motor are reduced, and the corresponding drive specifications are also reduced. Therefore, the requirements for motor selection are significantly reduced, and the manufacturing cost and usage cost are reduced.

[0093] The above has described the present invention in detail, aiming to enable those skilled in this field of technology to understand the content of the present invention and implement it. However, it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A fully electric and ejectable injection molding machine, comprising: A machine base; A barrel, which includes a barrel body with a material cavity formed inside, and a nozzle provided at the front end of the barrel body, wherein a plastic raw material inlet is provided on the barrel body; A screw, which extends along the length direction of the barrel and extends into the machine base from the rear end; A pressure sensor; A power system, which is used to drive the screw to rotate around its own axis or / and move linearly along its own length direction. Its characteristics are as follows: The power system includes a transmission lead screw located behind the screw and having its rear end passing through the machine base, a transmission nut threadedly engaged with the transmission lead screw, a feeding power device for driving or restricting the rotation of the transmission nut, an injection power device for driving the transmission lead screw to rotate around its own axis, and an ejecting power telescopic rod that moves synchronously with the transmission nut and has energy storage and energy release modes. The central lines of the transmission nut, the transmission lead screw, and the screw coincide, and the transmission nut is synchronously connected to the rear end of the screw from the front end. The telescopic direction of the ejecting power telescopic rod is parallel to the length direction of the screw; A positioning seat is formed on the machine base. A first hole and a second hole that are connected and form a stepped hole are formed inside the positioning seat. A chute extending along its own length direction is formed on the outer periphery of the transmission nut. The power system further includes a sliding collar sleeve provided on the outer periphery of the transmission nut and having a sliding groove matching the chute formed inside, and a rotating bearing that rotatably connects the sliding collar sleeve to the inner wall of the first hole. The feeding power device is used to drive the sliding collar sleeve to rotate, and the feeding power device includes a feeding transmission shaft fixedly connected to the sliding collar sleeve and sleeved on the outer periphery of the transmission nut, a feeding wheel disc provided on the feeding transmission shaft, a feeding motor with an output shaft parallel to the transmission nut, and a feeding transmission member that drives and connects the feeding motor and the feeding wheel disc. There are at least two ejecting power telescopic rods, which are evenly distributed around the center of the feeding wheel disc on the outer periphery of the screw.

2. The all-electric and ejection type injection molding machine according to claim 1, characterized in that: The aperture of the first hole is larger than the aperture of the second hole, and the first hole is located at the front end of the second hole. The transmission lead screw passes through the first hole and the second hole in sequence and then passes through the rear end of the machine base. The transmission lead screw is rotatably connected to the inner wall of the second hole through a bearing. The transmission nut moves linearly or rotates in the first hole.

3. The all-electric and ejectable injection molding machine according to claim 1, wherein: There are multiple chutes, which are distributed circumferentially around the transmission nut. Each chute communicates with the outside from the rear end.

4. The all-electric and ejection-type injection molding machine according to claim 1, wherein: The sliding collar sleeve is located at the front end of the positioning seat. The feeding transmission member includes a feeding transmission wheel disc provided at the end of the output shaft and a transmission belt for driving and connecting the feeding transmission wheel disc and the feeding wheel disc.

5. The all-electric and ejection-type injection molding machine according to claim 4, characterized in that: The power system further includes a connecting seat plate that fixedly connects two or more of the ejecting power telescopic rods. The rear end of the screw passes through the connecting seat plate and is connected to the transmission nut. When the screw moves back and forth, the ejecting power telescopic rods synchronously expand and contract for energy release and energy storage; when the screw rotates, the feeding wheel disc and the ejecting power telescopic rods rotate synchronously.

6. The all-electric and ejection injection molding machine according to claim 5, wherein: A rotary joint is provided on the connecting seat plate. The rear end of the screw rod is fixedly connected to the front end of the rotary joint, and the front end of the transmission screw sleeve is fixedly connected to the rear of the rotary joint. An avoidance cavity is formed in the rotary joint. When the transmission screw sleeve moves linearly backward relative to the transmission screw rod, the front end of the transmission screw rod moves into the avoidance cavity.

7. The all-electric and ejection injection molding machine according to claim 1, characterized in that: The pressure sensor is arranged between the rear end of the positioning seat and the machine base.

8. The all-electric and ejection type injection molding machine according to claim 1, characterized in that: The injection power device includes an injection wheel disc fixed to the rear end of the transmission screw rod, an injection motor with an output shaft parallel to the transmission screw rod, and an injection transmission member that drives and connects the injection motor and the injection wheel disc.

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