Low-inertia high-precision all-electric injection table

Abstract

The low-inertia high-precision all-electric injection table comprises an injection table continuous casting piece, a melt glue driving assembly and a melt glue executing assembly, and the melt glue driving assembly is fixedly installed on the injection table continuous casting piece; the glue melting execution assembly is provided with a spline shaft and a spline sleeve in axial sliding fit with the spline shaft; the melt glue driving assembly drives the spline shaft to rotate through a first-stage transmission mechanism, and the spline sleeve drives the melt glue execution assembly to rotate through another-stage transmission mechanism; in the glue injection process, the spline housing axially moves along the spline shaft, the glue melting driving assembly does not axially move along with the glue melting execution assembly, and the spline housing and the glue melting execution assembly are in a separated state. According to the low-inertia high-precision all-electric injection table, the melt glue driving assembly and the melt glue executing assembly are separately installed, the melt glue driving assembly is fixedly installed and does not move along with the melt glue driving assembly, the total weight of axial moving parts in the glue injection process is obviously reduced, the axial inertia of the injection table during glue injection is obviously reduced, and the injection efficiency is improved. The service life of parts is prolonged; and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber plastic injection molding machine, in particular to a low-inertia high-precision full-electric shooting table. BACKGROUND

[0002] In the shooting table of the existing full-electric injection molding machine, the melt glue motor is placed in the radial direction of the melt glue execution assembly. When the melt glue is shot at high speed (the shooting speed is more than 500 mm / s), due to the self-weight of the melt glue execution assembly and the gravity center offset of the melt glue motor, the axial inertia of the melt glue execution assembly is large during the melt glue shooting action, and unnecessary forward inertia force of the motor is accompanied. In actual production, the large axial inertia will cause the melt glue movable plate brake to be difficult, the melt glue repetition accuracy to be poor, the melt glue peak pressure to be too high, the product flash to be large, and the like. In severe cases, the mold will be damaged; and the forward inertia force will deform the entire melt glue execution assembly, causing the injection screw to break.

[0003] Therefore, it is necessary to solve the above technical problems. SUMMARY

[0004] The present application aims at the above technical problems, and provides a low-inertia high-precision full-electric shooting table. The melt glue driving assembly and the melt glue execution assembly are separated and installed, the melt glue driving assembly is fixedly installed and does not follow the movement, the total weight of the axial moving parts is significantly reduced during the melt glue shooting process, the axial inertia of the shooting table during the melt glue shooting is obviously reduced, the melt glue shooting accuracy is improved, the part life is prolonged, and the energy consumption is reduced.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] A low-inertia high-precision full-electric shooting table, comprising a shooting table continuous casting, a melt glue driving assembly and a melt glue execution assembly, the melt glue driving assembly is fixedly installed on the shooting table continuous casting;

[0007] The melt glue execution assembly is provided with a spline shaft and a spline sleeve in axial sliding cooperation with the spline shaft;

[0008] The melt glue driving assembly drives the spline shaft to rotate through a primary transmission mechanism, and the spline sleeve drives the melt glue execution assembly to rotate through another primary transmission mechanism;

[0009] During the melt glue shooting process, the spline sleeve moves axially along the spline shaft, and the melt glue driving assembly does not move axially with the melt glue execution assembly, and the two are in a separated state.

[0010] The low-inertia high-precision full-electric injection table separates the melt glue driving assembly from the melt glue executing assembly for installation, the melt glue driving assembly is fixedly installed on the injection table continuous casting, the melt glue executing assembly moves axially during the melt glue injection process, the melt glue driving assembly does not follow the axial movement, the total weight of the axial movement components is significantly reduced, the axial inertia of the injection table during the melt glue injection is significantly reduced, the peak pressure of the melt glue injection is reduced, the melt glue injection precision is improved, the part life is prolonged, and the melt glue injection brake energy consumption is reduced.

[0011] The melt glue driving assembly drives the melt glue executing assembly to rotate through two-stage transmission mechanisms, both stages can reduce the rotation speed and amplify the torque, the power source in the melt glue driving assembly, such as a motor, can select a general high-speed low-torque motor, without the need for a special low-speed high-torque motor, and the servo can also select a smaller size, thereby reducing the equipment cost.

[0012] Further optimization, the melt glue driving assembly includes an output end of a melt glue motor connected to a first primary synchronous wheel, a first synchronous belt, and a first secondary synchronous wheel.

[0013] The melt glue executing assembly is also provided with a second primary synchronous wheel, a second synchronous belt, and a second secondary synchronous wheel.

[0014] The first secondary synchronous wheel is fixedly connected to the spline shaft, and the second primary synchronous wheel is fixedly connected to the spline sleeve.

[0015] The melt glue driving assembly drives the melt glue executing assembly to rotate through two-stage synchronous belts, the synchronous belt transmission has high precision, ensuring stable and reliable rotation of the melt glue executing assembly and high precision.

[0016] Further optimization, the spline shaft and the spline sleeve form a pair of motion pairs that rotate synchronously in the radial direction and slide freely in the axial direction. The motion pair refers to the connection form that allows specific relative motion between two components; that is, the spline sleeve can slide freely in the axial direction of the spline shaft to adapt to the melt glue displacement; the spline sleeve and the spline shaft rotate synchronously through tooth meshing to transmit the melt glue torque, and there is no relative rotation between them.

[0017] Further optimization, the spline shaft is a flange spline shaft. The flange structure of the flange spline shaft significantly enhances the bending moment resistance by increasing the end surface contact area, preventing the spline sleeve from twisting and deforming.

[0018] Further optimization, it also includes a screw barrel assembly connected to the injection table continuous casting, the screw barrel assembly is provided with an injection screw;

[0019] The second secondary synchronous wheel is connected to the injection screw and drives it to rotate. The second secondary synchronous wheel drives the injection screw to rotate to realize the melt glue step, and the solid plastic particles are melted through the shear heat generated by the rotation of the injection screw, the friction between the particles, the friction with the surface of the barrel / screw, and the conduction heat of the external heater of the barrel.

[0020] Further optimization scheme, the glue injection driving assembly is provided with a glue injection movable plate and a rotating inner sleeve, the rotating inner sleeve is rotationally arranged in the glue injection movable plate;

[0021] The end of the rotating inner sleeve is connected with the injection screw, the secondary synchronous gear outer sleeve is arranged outside the rotating inner sleeve and drives the rotating inner sleeve to rotate.

[0022] Further optimization scheme, the glue injection driving assembly is provided with a connecting sleeve and a transmission connecting piece, the connecting sleeve is rotationally arranged in the transmission connecting piece;

[0023] The connecting sleeve is movably penetrated through the spline shaft and fixedly connected with the secondary main synchronous gear, and the transmission connecting piece is connected with the glue injection movable plate.

[0024] The connecting sleeve is fixedly connected with the secondary main synchronous gear and connected with the glue injection movable plate through the transmission connecting piece, so that the stability of the secondary transmission mechanism in rotation is ensured, and axial back-and-forth swinging of the spline sleeve on the spline shaft in the rotating process is avoided.

[0025] During the glue injection process, the glue injection motor stops rotating, and the corresponding secondary transmission mechanism and the injection screw stop rotating; the glue injection movable plate drives the spline sleeve to move axially on the spline shaft through the transmission connecting piece, so that the glue injection executing assembly is synchronously moved axially.

[0026] Further optimization scheme, the glue injection driving assembly further comprises a driving motor transmission ball screw assembly, and a screw nut of the ball screw assembly is in transmission connection with the glue injection movable plate;

[0027] The axial movement of the screw nut drives the axial movement of the glue injection movable plate, and further drives the axial movement of the injection screw to complete the glue injection action.

[0028] Compared with the prior art, the low-inertia high-precision full-electric injection platform has the following technical advantages:

[0029] 1. Low inertia, the glue injection motor is fixedly installed and does not move when the glue injection is performed, so that the total weight of the glue injection executing assembly is significantly reduced, the axial inertia of the injection platform during the glue injection is obviously reduced, the peak pressure of the glue injection is reduced, and the glue injection precision is improved;

[0030] 2. High stability, the forward tilting inertia force of the glue injection motor is eliminated, and the risk of breakage of the injection screw is avoided;

[0031] 3. Low cost, the two-stage transmission mechanism can use a high-speed low-torque general motor, and a small-sized servo is used, so that the equipment cost is reduced;

[0032] 4. Energy saving, the energy consumption of the glue injection brake is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 This is a perspective view of a specific embodiment of the low-inertia, high-precision, all-electric shooting platform of the present invention;

[0034] Figure 2 yes Figure 1 A stereogram from another perspective;

[0035] Figure 3 yes Figure 1 The main view;

[0036] Figure 4 yes Figure 3 Left view of;

[0037] Figure 5 yes Figure 3 Right view;

[0038] Figure 6 yes Figure 4 AA section view;

[0039] Figure 7 yes Figure 6 A partial enlarged view of middle B.

[0040] In the figure: the injection molding machine continuous casting component 10, the melt drive assembly 20, the melt motor 21, the first-level main synchronous pulley 22, the first-level synchronous belt 23, the first-level slave synchronous pulley 24, the melt actuator assembly 30, the spline shaft 31, the spline sleeve 32, the second-level main synchronous pulley 33, the second-level synchronous belt 34, the second-level slave synchronous pulley 35, the connecting sleeve 36, the transmission connecting piece 37, the bearing locking nut 38, the screw barrel assembly 40, the injection screw 41, the injection drive assembly 50, the injection movable plate 51, the rotating inner sleeve 52, the drive motor 53, the ball screw assembly 54, the screw nut 54a, and the injection synchronous belt and synchronous pulley assembly 55. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below with reference to the embodiments in the accompanying drawings.

[0042] like Figures 1 to 7 As shown, a specific embodiment of the low-inertia and high-precision all-electric shooting platform of the present invention.

[0043] like Figure 1 and Figure 2 As shown, the low-inertia, high-precision, all-electric shooting platform of this embodiment includes a shooting platform continuous casting 10, a melt driving assembly 20 and a melt execution assembly 30, and the melt driving assembly 20 is fixedly installed on the shooting platform continuous casting 10.

[0044] like Figure 3 、 Figure 6 and Figure 7As shown, the glue execution assembly 30 is provided with a spline shaft 31 and a spline sleeve 32 in axial sliding fit with the spline shaft 31; the glue driving assembly 20 drives the spline shaft 31 to rotate through a primary transmission mechanism, and the spline sleeve 32 drives the glue execution assembly 30 to rotate through another transmission mechanism. The spline shaft 31 is horizontally arranged, and the front and rear ends thereof are rotatably arranged on the casting platform 10 through bearings.

[0045] During the glue injection process, the spline sleeve 32 moves axially along the spline shaft 31, and the glue driving assembly 20 does not move axially with the glue execution assembly 30, and the two are in a separated state.

[0046] The low-inertia high-precision fully electric casting platform separates the glue driving assembly from the glue execution assembly, and the glue driving assembly is fixedly arranged on the casting platform, and the glue execution assembly moves axially during the glue injection process, and the glue driving assembly does not move axially with the glue execution assembly, the total weight of the axially moving components is significantly reduced, the axial inertia of the casting platform during the glue injection process is significantly reduced, the peak pressure of the glue injection is reduced, the glue injection precision is improved, the service life of the components is prolonged, and the energy consumption of the glue injection brake is reduced.

[0047] The glue driving assembly drives the glue execution assembly to rotate through two-stage transmission mechanisms, both of which can reduce the rotating speed and amplify the torque, and the power source in the glue driving assembly, such as a motor, can select a general high-speed low-torque motor, without the need for a special low-speed high-torque motor, and the servo can also select a smaller size, thereby reducing the equipment cost.

[0048] As shown in the drawings, Figures 3 to 6 The glue driving assembly 20 includes the output end of the glue motor 21 connected with a primary master synchronous wheel 22, a primary synchronous belt 23, and a primary slave synchronous wheel 24.

[0049] As shown in the drawings, Figure 6 and Figure 7 The glue execution assembly 30 is further provided with a secondary master synchronous wheel 33, a secondary synchronous belt 34, and a secondary slave synchronous wheel 35. The primary slave synchronous wheel 24 is fixedly connected with the spline shaft 31, and the secondary master synchronous wheel 33 is fixedly connected with the spline sleeve 32.

[0050] The glue driving assembly 20 drives the glue execution assembly 30 to rotate through two-stage synchronous belts, and the synchronous belt transmission has high precision, which ensures that the glue execution assembly 30 rotates stably, reliably, and with high precision.

[0051] As shown in the drawings, Figure 6 The spline shaft 31 and the spline sleeve 32 form a pair of motion pairs that rotate synchronously in the radial direction and slide freely in the axial direction. The pair of motion pairs refers to a connection form that allows specific relative motion between two components; that is, the spline sleeve 32 can slide freely in the axial direction along the spline shaft 31 to adapt to the displacement of the glue injection; the spline sleeve 32 and the spline shaft 31 rotate synchronously through the tooth meshing to transmit the glue torque, and there is no relative rotation between them in the circumferential direction.

[0052] The spline shaft 31 is a flange spline shaft 31. The flange structure of the flange spline shaft 31 significantly enhances the bending moment resistance by increasing the end face contact area, preventing the spline sleeve 32 from being twisted and deformed.

[0053] As shown in Figure 1 and Figure 6 , the low-inertia high-precision full-electric shooting platform also includes a screw barrel assembly 40 connected with the shooting platform continuous casting 10, and the screw barrel assembly 40 is provided with an injection screw 41; the secondary slave synchronous wheel 35 connects the injection screw 41 and drives it to rotate.

[0054] During the feeding and storage process of the screw barrel assembly 40, the glue melting motor 21 rotates to melt the glue material, and at the same time pushes the glue melting execution assembly 30 to move backward, preparing for glue shooting.

[0055] The secondary slave synchronous wheel 35 drives the injection screw 41 to rotate to realize the glue melting step. The solid plastic particles are melted by the combined action of shear heat generated by the rotation of the injection screw 41, friction between particles and the surface of the barrel / screw, and conduction heat of the external heater of the barrel.

[0056] As shown in Figure 1 and Figure 6 , the low-inertia high-precision full-electric shooting platform also includes a glue shooting driving assembly 50, which is provided with a glue shooting movable plate 51 and a rotating inner sleeve 52, and the rotating inner sleeve 52 is rotatably arranged in the glue shooting movable plate 51. The rotating inner sleeve 52 and the glue shooting movable plate 51 are respectively provided with bearings in front and back to rotate together.

[0057] The end of the rotating inner sleeve 52 is connected with the injection screw 41, and the secondary slave synchronous wheel 35 is sleeved outside the rotating inner sleeve 52 and drives it to rotate.

[0058] As shown in Figure 6 and Figure 7 , the glue melting execution assembly 30 is also provided with a connecting sleeve 36 and a transmission connecting piece 37, and the connecting sleeve 36 is rotatably sleeved in the transmission connecting piece 37; the connecting sleeve 36 movably penetrates the spline shaft 31 and is fixedly connected with the secondary master synchronous wheel 33, and the transmission connecting piece 37 is connected with the glue shooting movable plate 51.

[0059] The connecting sleeve 36 and the transmission connecting piece 37 are provided with bearings to rotate with each other, and the connecting sleeve 36 is provided with a bearing locking nut 38 to fix the bearing.

[0060] The connecting sleeve 36 is fixedly connected with the secondary master synchronous wheel 33 and connected with the glue shooting movable plate 51 through the transmission connecting piece 37, which ensures the stability of the secondary transmission mechanism rotation and avoids the axial back and forth swing of the spline sleeve 32 on the spline shaft 31 during the rotation process.

[0061] During the injection process, the melt glue motor 21 stops rotating, and the corresponding secondary transmission mechanism and injection screw 41 stop rotating; the injection movable plate 51 drives the spline sleeve 32 to move axially on the spline shaft 31 through the transmission connecting piece 37, thereby ensuring that the melt glue execution assembly 30 moves synchronously and axially.

[0062] As shown in Figure 6 The injection driving assembly 50 further includes a driving motor 53 transmission ball screw assembly 54, and the driving motor 53 drives the ball screw assembly 54 to rotate through the injection synchronous belt synchronous wheel assembly 55. The screw nut 54a of the ball screw assembly 54 drives the injection movable plate 51; the axial movement of the screw nut 54a drives the injection movable plate 51 to move axially, thereby driving the injection screw 41 to move axially to complete the injection action.

[0063] The low-inertia high-precision all-electric injection platform separates the melt glue motor and the melt glue execution assembly, fixes the melt glue motor without movement, significantly reduces the total weight of the axial moving parts during the injection process, significantly reduces the axial inertia of the injection platform during injection, improves the injection precision, prolongs the service life of the parts, and reduces the energy consumption.

[0064] In summary, the application as described in the specification and the drawings, actual samples are made and tested for many times, and the test results prove that the application can achieve the expected purpose, and the practicability is self-evident. The above examples are only used to facilitate the description of the content of the application, and are not limited in form; any person skilled in the art with common knowledge, without departing from the technical features and similar features of the application, using the disclosed technical content of the application, making equivalent embodiments of partial changes or modifications, all belong to the protection scope of the application.

Claims

1. A low-inertia, high-precision, fully electric shooting platform, characterized by: It comprises a shooting platform continuous casting (10), a melt driving assembly (20) and a melt execution assembly (30), wherein the melt driving assembly (20) is fixedly mounted on the shooting platform continuous casting (10); The melt glue execution assembly (30) is provided with a spline shaft (31) and a spline sleeve (32) axially slidingly engaged with the spline shaft; The melt glue driving assembly (20) drives the spline shaft (31) to rotate via a first-stage transmission mechanism, and the spline sleeve (32) drives the melt glue executing assembly (30) to rotate via another-stage transmission mechanism; During the injection process, the spline sleeve (32) moves axially along the spline shaft (31), and the melt glue driving assembly (20) does not follow the axial movement of the melt glue execution assembly (30), and the two are in a separated state.

2. The low-inertia, high-precision, all-electric shooting platform according to claim 1 is characterized in that: The melt glue driving assembly (20) includes an output end of a melt glue motor (21) connected to a primary main synchronous wheel (22), a primary synchronous belt (23) and a primary slave synchronous wheel (24); The melt glue execution assembly (30) is further provided with a secondary main synchronous wheel (33), a secondary synchronous belt (34) and a secondary slave synchronous wheel (35); The primary slave synchronous wheel (24) is fixedly connected to the spline shaft (31), and the secondary master synchronous wheel (33) is fixedly connected to the spline sleeve (32).

3. The low-inertia, high-precision, all-electric shooting platform according to claim 1 is characterized in that: A kinematic pair is formed between the spline shaft (31) and the spline sleeve (32), which rotates synchronously in the radial direction and slides freely in the axial direction.

4. The low-inertia, high-precision, all-electric shooting platform according to claim 1 is characterized in that: The spline shaft (31) is a flange-type spline shaft (31).

5. The low-inertia, high-precision, all-electric shooting platform according to claim 2 is characterized in that: It also includes a screw barrel assembly (40) connected to the injection molding continuous casting (10), and the screw barrel assembly (40) is provided with an injection screw (41); The secondary slave synchronous wheel (35) is connected to the injection screw (41) and drives it to rotate.

6. The low-inertia, high-precision, all-electric shooting platform according to claim 5 is characterized in that: It also includes an injection drive assembly (50), which is provided with an injection movable plate (51) and a rotating inner sleeve (52), wherein the rotating inner sleeve (52) is rotatably arranged inside the injection movable plate (51); The end of the rotating inner sleeve (52) is connected to the injection screw (41), and the secondary synchronous wheel (35) is externally mounted on the rotating inner sleeve (52) and drives the rotating inner sleeve (52) to rotate.

7. The low-inertia, high-precision, all-electric shooting platform according to claim 6 is characterized in that: The melt-adhesive execution assembly (30) is further provided with a connecting sleeve (36) and a transmission connecting piece (37), wherein the connecting sleeve (36) is rotatably sleeved inside the transmission connecting piece (37); The connecting sleeve (36) movably passes through the spline shaft (31) and is fixedly connected to the secondary main synchronous wheel (33), and the transmission connecting member (37) is connected to the injection movable plate (51).

8. The low-inertia, high-precision, all-electric shooting platform according to claim 6 is characterized in that: The injection drive assembly (50) further includes a drive motor (53) driving a ball screw assembly (54), wherein a screw nut (54a) of the ball screw assembly (54) is in driving connection with the injection movable plate (51); The axial movement of the screw nut (54a) drives the axial movement of the injection movable plate (51), thereby driving the axial movement of the injection screw (41) to complete the injection action.

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