Injection unit and injection molding machine

Abstract

The present invention provides an injection unit and an injection molding machine. The injection unit includes: a plasticizing driven wheel and an injection driven wheel, which are sequentially arranged at intervals along a predetermined direction; a transmission pin, which is connected to the plasticizing driven wheel and is located on the side of the plasticizing driven wheel close to the injection driven wheel; an external gear, which is connected to the injection driven wheel and is located on the side of the injection driven wheel close to the plasticizing driven wheel; a joint member, which is movably arranged along the predetermined direction on the side of the plasticizing driven wheel close to the injection driven wheel. A through hole for slidably connecting with the transmission pin is arranged on the joint member, and an internal gear ring for meshing with the external gear is also arranged on the joint member. Wherein, the joint member includes an engagement position for engaging with the external gear and a separation position for separating from the external gear, so as to solve the problem that the power of the driving screw in the injection unit in the prior art cannot participate in the pressure holding.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and more particularly, to an injection unit and an injection molding machine. Background Art

[0002] Currently, the driving screw and the driving injection screw are two independent power sources. The power of the driving screw cannot participate in the holding pressure. To meet the requirements of the injection molding process for long-term holding pressure, a large-sized servo motor and a driver are required for the injection power, which leads to high requirements for the servo motor and the driver, and also results in high costs for injection molding production. Summary of the Invention

[0003] The main object of the present invention is to provide an injection unit and an injection molding machine to solve the problem that the power of the driving screw in the existing injection unit cannot participate in the holding pressure.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an injection unit, including: a melt plastic driven wheel and an injection driven wheel, which are sequentially arranged at intervals along a predetermined direction; a transmission pin, which is connected to the melt plastic driven wheel and is located on the side of the melt plastic driven wheel close to the injection driven wheel; an external gear, which is connected to the injection driven wheel and is located on the side of the injection driven wheel close to the melt plastic driven wheel; a engaging member, which is movably arranged on the side of the melt plastic driven wheel close to the injection driven wheel along the predetermined direction. A through hole for slidably connecting with the transmission pin is arranged on the engaging member, and an internal gear ring for meshing with the external gear is also arranged on the engaging member; wherein, the engaging member includes an engaging position for meshing with the external gear and a separating position for separating from the external gear.

[0005] Further, the number of the transmission pins is multiple, and the multiple transmission pins are sequentially arranged at intervals around the rotation axis of the melt plastic driven wheel; the number of the through holes is multiple, and the multiple through holes are arranged in one-to-one correspondence with the multiple transmission pins.

[0006] Further, the injection unit includes a transition connecting portion, and the injection driven wheel and the external gear are connected through the transition connecting portion, and the transition connecting portion is used for avoiding the engaging member.

[0007] Further, the outer diameter of the transition connecting portion is smaller than the tip circle diameter of the internal gear ring, and the width of the transition connecting portion in the predetermined direction is greater than the width of the engaging member in the predetermined direction.

[0008] Furthermore, the injection unit includes two support plates arranged at intervals and a plurality of guide posts located between the two support plates and arranged at intervals around the rotation axis of the plasticizing driven wheel; the injection unit further includes a moving part, which is arranged between the two support plates and sleeved on the plurality of guide posts to slide along a predetermined direction, and the plasticizing driven wheel is rotatably connected to the moving part, and the injection driven wheel is rotatably connected to one of the two support plates; wherein, the injection unit includes a driving part, which is arranged on the moving part and is drivingly connected to the engaging part to drive the engaging part to move along a predetermined direction.

[0009] Furthermore, the driving part is a cylinder, the cylinder block of the cylinder is connected to the moving part, and the piston rod of the cylinder is connected to the engaging part; and / or the number of the driving parts is plural, and the plural driving parts are arranged at intervals around the rotation axis of the plasticizing driven wheel.

[0010] Furthermore, the injection unit includes two support plates arranged at intervals and a plurality of guide posts located between the two support plates and arranged at intervals around the rotation axis of the plasticizing driven wheel; the injection unit includes an engaging guiding assembly, and the engaging part is movably connected to the plurality of guide posts through the engaging guiding assembly.

[0011] Furthermore, the engaging guiding assembly includes: a clamping plate sleeved outside the engaging part and clamped with an annular clamping groove on the outer peripheral surface of the engaging part; a dial plate sleeved outside the engaging part and connected to the clamping plate, and the dial plate is slidably sleeved on the plurality of guide posts; wherein, the clamping plate and the dial plate are detachably connected.

[0012] Furthermore, the engaging guiding assembly includes a plurality of guide sleeves, the plurality of guide sleeves are correspondingly and slidably sleeved on the plurality of guide posts, and the dial plate is sleeved on the plurality of guide sleeves and fixedly connected to all the guide sleeves; and / or the clamping plate is composed of a plurality of sub-plate bodies arranged at intervals around the central line of the engaging part, and each sub-plate body is detachably connected to the dial plate.

[0013] According to another aspect of the present invention, an injection molding machine is provided, which includes the above-mentioned injection unit.

[0014] Applying the technical solution of the present invention, the injection unit of the present invention includes: a plasticizing driven wheel and an injection driven wheel, which are sequentially arranged at intervals along a predetermined direction; a transmission pin, which is connected to the plasticizing driven wheel and is located on the side of the plasticizing driven wheel close to the injection driven wheel; an external gear, which is connected to the injection driven wheel and is located on the side of the injection driven wheel close to the plasticizing driven wheel; a joint member, which is movably arranged along the predetermined direction on the side of the plasticizing driven wheel close to the injection driven wheel, a through hole for slidably connecting with the transmission pin is arranged on the joint member, and an internal gear ring for meshing with the external gear is also arranged on the joint member; wherein, the joint member includes an engaging position for meshing with the external gear and a separating position for separating from the external gear. In this way, by setting the joint member in the injection unit of the present invention, when the joint member is in the engaging position, the power of the plasticizing driven wheel can be transmitted to the injection driven wheel, and when the joint member is in the separating position, the rotation of the plasticizing driven wheel and the rotation of the injection driven wheel do not interfere with each other, and the small rotation of the driving screw during the holding pressure does not affect the quality of the injection molded part after molding, solving the problem that the power of the driving screw cannot participate in the holding pressure, reducing the requirements for the motor and driver of the injection driven wheel, and reducing the injection molding production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 shows a schematic structural diagram of an embodiment of an injection unit according to the present invention;

[0017] Figure 2 shows Figure 1 a sectional view of the injection unit shown;

[0018] Figure 3 shows Figure 1 a schematic structural diagram of the plasticizing driven wheel of the injection unit shown;

[0019] Figure 4 shows Figure 1 a connection schematic diagram of the injection driven wheel, the external gear and the transition connection part of the injection unit shown;

[0020] Figure 5 shows Figure 1 a schematic structural diagram of the joint member of the injection unit shown;

[0021] Figure 6 shows Figure 1 a schematic structural diagram of the clamping plate of the joint guiding assembly of the injection unit shown;

[0022] Figure 7 showsFigure 1 Schematic structural diagram of the dial plate of the engagement guiding assembly of the injection unit shown

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 1. Melt plastic driven wheel; 2. Injection driven wheel; 3. Transmission pin; 4. External gear; 5. Engaging member; 51. Through hole; 52. Internal gear ring; 53. Annular clamping groove; 501. Engaging position; 502. Separating position; 6. Transition connecting portion; 7. Support plate; 8. Guide post; 9. Moving portion; 10. Driving portion; 101. Cylinder block; 102. Piston rod; 11. Engagement guiding assembly; 111. Clamping plate; 1110. Split plate body; 112. Dial plate; 113. Guide sleeve Specific embodiments

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments

[0026] As Figures 1 to 7 shown, the present invention provides an injection unit, including: a melt plastic driven wheel 1 and an injection driven wheel 2, the melt plastic driven wheel 1 and the injection driven wheel 2 are arranged at intervals in sequence along a predetermined direction; a transmission pin 3, the transmission pin 3 is connected to the melt plastic driven wheel 1 and is located on the side of the melt plastic driven wheel 1 close to the injection driven wheel 2; an external gear 4, the external gear 4 is connected to the injection driven wheel 2 and is located on the side of the injection driven wheel 2 close to the melt plastic driven wheel 1; an engaging member 5, which is movably arranged on the side of the melt plastic driven wheel 1 close to the injection driven wheel 2 along a predetermined direction, a through hole 51 for slidably connecting with the transmission pin 3 is arranged on the engaging member 5, and an internal gear ring 52 for meshing with the external gear 4 is also arranged on the engaging member 5; among them, the engaging member 5 includes an engaging position 501 for meshing with the external gear 4 and a separating position 502 for separating from the external gear 4

[0027] In this way, the injection unit of the present invention realizes that when the engaging member 5 is located at the engaging position 501, the power of the melt plastic driven wheel 1 can be transmitted to the injection driven wheel 2, and when the engaging member 5 is located at the separating position 502, the rotation of the melt plastic driven wheel 1 and the rotation of the injection driven wheel 2 do not interfere with each other. During the pressure holding process, the driving screw can rotate slightly without affecting the quality of the injection molded part after molding, solves the problem that the power of the driving screw cannot participate in the pressure holding, reduces the requirements for the motor and driver of the injection driven wheel 2, and reduces the injection molding production cost

[0028] Specifically, the number of the transmission pins 3 is multiple, and the multiple transmission pins 3 are arranged at intervals in sequence around the rotation axis of the melt plastic driven wheel 1; the number of the through holes 51 is multiple, and the multiple through holes 51 are arranged in one-to-one correspondence with the multiple transmission pins 3

[0029] As Figure 2 and Figure 4 shown, the injection unit includes a transition connection portion 6. The injection follower wheel 2 and the external gear 4 are connected through the transition connection portion 6, and the transition connection portion 6 is used to avoid the engagement member 5.

[0030] Specifically, the outer diameter of the transition connection portion 6 is smaller than the pitch circle diameter of the addendum circle of the internal gear ring 52, and the width of the transition connection portion 6 in a predetermined direction is greater than the width of the engagement member 5 in the predetermined direction.

[0031] As Figure 1 and Figure 2 shown, the injection unit includes two support plates 7 arranged at intervals and a plurality of guide posts 8 arranged between the two support plates 7 and spaced around the rotation axis of the plasticizing follower wheel 1; the injection unit further includes a moving portion 9. The moving portion 9 is arranged between the two support plates 7 and sleeved on the plurality of guide posts 8 to slide along a predetermined direction. The plasticizing follower wheel 1 is rotatably connected to the moving portion 9, the injection follower wheel 2 is rotatably connected to one of the two support plates 7, the plasticizing follower wheel 1 and the injection follower wheel 2 are located on the same side of the moving portion 9, and the rotation axes of the plasticizing follower wheel 1 and the injection follower wheel 2 are coaxially arranged; wherein, the injection unit includes a driving portion 10. The driving portion 10 is arranged on the moving portion 9 and is drivingly connected to the engagement member 5 to drive the engagement member 5 to move in a predetermined direction.

[0032] Specifically, the driving portion 10 is a cylinder. The cylinder block 101 of the cylinder is connected to the moving portion 9, and the piston rod 102 of the cylinder is connected to the engagement member 5; and / or the number of the driving portions 10 is multiple, and the multiple driving portions 10 are arranged at intervals around the rotation axis of the plasticizing follower wheel 1.

[0033] As Figure 1 and Figure 2 shown, the injection unit includes two support plates 7 arranged at intervals and a plurality of guide posts 8 arranged between the two support plates 7 and spaced around the rotation axis of the plasticizing follower wheel 1; the injection unit includes an engagement guiding assembly 11. The engagement member 5 is movably connected to the plurality of guide posts 8 through the engagement guiding assembly 11 to slide along the plurality of guide posts 8.

[0034] Specifically, the driving portion 10 is connected to the engagement guiding assembly 11 to drive the engagement member 5 to move through the engagement guiding assembly 11.

[0035] As Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown in the figure, the engagement guiding assembly 11 includes: a clamping plate 111 sleeved outside the engagement member 5 and clamped with an annular clamping groove 53 on the outer peripheral surface of the engagement member 5; a dial plate 112 sleeved outside the engagement member 5 and connected to the clamping plate 111, and the dial plate 112 is slidably sleeved on a plurality of guiding columns 8; wherein, the clamping plate 111 and the dial plate 112 are detachably connected.

[0036] Preferably, the engagement guiding assembly 11 includes a plurality of guide sleeves 113, and the plurality of guide sleeves 113 are correspondingly and slidably sleeved on the plurality of guiding columns 8 one by one, and the dial plate 112 is sleeved on the plurality of guide sleeves 113 and fixedly connected to all the guide sleeves 113; and / or the clamping plate 111 is composed of a plurality of sub-plate bodies 1110 arranged at intervals around the central axis of the engagement member 5, and each sub-plate body 1110 is detachably connected to the dial plate 112.

[0037] Specifically, a central through hole for clamping with the annular clamping groove 53 is arranged on the clamping plate 111; a plurality of guide sleeve mounting holes for mounting the guide sleeves 113 and an avoidance hole for avoiding the engagement member 5 are arranged on the dial plate 112, and the centers of these holes are located on the same straight line.

[0038] The present invention also provides an injection molding machine including the above-mentioned injection unit.

[0039] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0040] The injection unit of the present invention includes: a plasticizing driven wheel 1 and an injection driven wheel 2, and the plasticizing driven wheel 1 and the injection driven wheel 2 are sequentially arranged at intervals along a predetermined direction; a transmission pin 3 connected to the plasticizing driven wheel 1 and located on the side of the plasticizing driven wheel 1 close to the injection driven wheel 2; an external gear 4 connected to the injection driven wheel 2 and located on the side of the injection driven wheel 2 close to the plasticizing driven wheel 1; an engagement member 5 movably arranged along the predetermined direction on the side of the plasticizing driven wheel 1 close to the injection driven wheel 2, a through hole 51 for slidably connecting with the transmission pin 3 is arranged on the engagement member 5, and an internal gear ring 52 for meshing with the external gear 4 is also arranged on the engagement member 5; wherein, the engagement member 5 includes an engagement position 501 for meshing with the external gear 4 and a separation position 502 for separating from the external gear 4. In this way, by arranging the engagement member 5 in the injection unit of the present invention, when the engagement member 5 is in the engagement position 501, the power of the plasticizing driven wheel 1 can be transmitted to the injection driven wheel 2, and when the engagement member 5 is in the separation position 502, the rotation of the plasticizing driven wheel 1 and the rotation of the injection driven wheel 2 do not interfere with each other, and the small rotation of the driving screw during the pressure holding process does not affect the quality of the injection molded part after molding, solving the problem that the power of the driving screw cannot participate in the pressure holding, reducing the requirements for the motor and driver of the injection driven wheel 2, and reducing the injection molding production cost.

[0041] Note that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0043] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0044] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An injection unit, characterized in that, Comprising: A plasticizing driven wheel (1) and an injection driven wheel (2), the plasticizing driven wheel (1) and the injection driven wheel (2) are sequentially arranged at intervals along a predetermined direction; A transmission pin (3), the transmission pin (3) is connected to the plasticizing driven wheel (1) and is located on one side of the plasticizing driven wheel (1) close to the injection driven wheel (2); An external gear (4), the external gear (4) is connected to the injection driven wheel (2) and is located on one side of the injection driven wheel (2) close to the plasticizing driven wheel (1); An engaging member (5) is movably arranged on one side of the plasticizing driven wheel (1) close to the injection driven wheel (2) along the predetermined direction. A through hole (51) for slidably connecting with the transmission pin (3) is arranged on the engaging member (5), and an internal gear ring (52) for meshing with the external gear (4) is also arranged on the engaging member (5); Wherein, the engaging member (5) includes an engaging position (501) meshing with the external gear (4) and a separating position (502) separated from the external gear (4). When the engaging member (5) is located at the engaging position (501), the power of the plasticizing driven wheel (1) can be transmitted to the injection driven wheel (2), and when the engaging member (5) is located at the separating position (502), the rotation of the plasticizing driven wheel (1) and the rotation of the injection driven wheel (2) do not interfere with each other; The injection unit further includes a transition connecting portion (6), the injection driven wheel (2) and the external gear (4) are connected through the transition connecting portion (6), and the transition connecting portion (6) is used for avoiding the engaging member (5); The injection unit further includes two spaced-apart support plates (7) and a plurality of guide posts (8) located between the two support plates (7) and arranged at intervals around the rotation axis of the plasticizing driven wheel (1); The injection unit further includes a moving portion (9), the moving portion (9) is arranged between the two support plates (7) and sleeved on the plurality of guide posts (8) to slide along the predetermined direction. The plasticizing driven wheel (1) is rotatably connected to the moving portion (9), and the injection driven wheel (2) is rotatably connected to one of the two support plates (7); Wherein, the injection unit includes a driving portion (10), the driving portion (10) is arranged on the moving portion (9) and is drivingly connected to the engaging member (5) to drive the engaging member (5) to move along the predetermined direction.

2. The injection unit according to claim 1, characterized in that, The number of the transmission pins (3) is multiple, and the multiple transmission pins (3) are sequentially arranged at intervals around the rotation axis of the plasticizing driven wheel (1); the number of the through holes (51) is multiple, and the multiple through holes (51) are arranged in one-to-one correspondence with the multiple transmission pins (3).

3. The injection unit according to claim 1, characterized in that The outer diameter of the transition connecting portion (6) is smaller than the pitch circle diameter of the internal gear ring (52), and the width of the transition connecting portion (6) in the predetermined direction is greater than the width of the engaging member (5) in the predetermined direction.

4. The injection unit according to claim 1, wherein The driving part (10) is a cylinder, the cylinder block (101) of the cylinder is connected to the moving part (9), and the piston rod (102) of the cylinder is connected to the engaging part (5); and / or The number of the driving parts (10) is multiple, and the multiple driving parts (10) are arranged at intervals around the rotation axis of the plasticizing driven wheel (1).

5. The injection unit according to claim 1, characterized in that The injection unit includes two support plates (7) arranged at intervals and a plurality of guide posts (8) located between the two support plates (7) and arranged at intervals around the rotation axis of the plasticizing driven wheel (1); the injection unit includes an engaging and guiding assembly (11), and the engaging part (5) is movably connected to the plurality of guide posts (8) through the engaging and guiding assembly (11).

6. The injection unit according to claim 5, characterized in that, The engaging and guiding assembly (11) includes: A clamping plate (111) sleeved outside the engaging part (5) and clamped with an annular clamping groove (53) on the outer peripheral surface of the engaging part (5); A shifting plate (112) sleeved outside the engaging part (5) and connected to the clamping plate (111), and the shifting plate (112) is slidably sleeved on the plurality of guide posts (8); Wherein, the clamping plate (111) and the shifting plate (112) are detachably connected to each other.

7. The injection unit according to claim 6, wherein The engaging and guiding assembly (11) includes a plurality of guide sleeves (113), the plurality of guide sleeves (113) are respectively and slidably sleeved on the plurality of guide posts (8), and the shifting plate (112) is sleeved on the plurality of guide sleeves (113) and fixedly connected to the plurality of guide sleeves (113); and / or The clamping plate (111) is composed of a plurality of sub-plate bodies (1110) arranged at intervals around the center line of the engaging part (5), and each of the sub-plate bodies (1110) is detachably connected to the shifting plate (112).

8. An injection molding machine, characterized in that, An injection unit according to any one of claims 1 to 7 is included.

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