Middle plate structure of electric mode locking column frame

Abstract

The utility model discloses a middle plate structure of an electric mode locking column frame, which comprises a middle plate component and a pair of supporting hinge lugs, the supporting hinge lugs are relatively inclined and are symmetrically mounted on one side of the middle plate component up and down, and the axial surfaces of the two supporting hinge lugs intersect and are matched with the other side surface of the middle plate component to form a mounting space; the mounting space is suitable for mounting an injection mold; and during mold locking, the mold locking force of the middle plate component is suitable for being in the axis direction of the middle plate component. The mold locking device has the beneficial effects that the supporting hinge lugs are mounted in a relatively inclined manner, so that mold locking force acts perpendicular to the middle plate component, inward extrusion force can be formed on a mold of the middle plate component, the force can uniformly act on the mold, the limiting effect on the mold is enhanced, and the mold locking effect is improved. And the mold is more stable and reliable during mold locking.

Description

Technical Field

[0001] This application relates to the field of injection molding machine technology, and in particular to a middle plate structure of an electric clamping column. Background Technology

[0002] An injection molding machine, also known as an injection molding machine or injection molding machine, is a primary molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The middle plate component of the clamping column is one of the most important parts of an injection molding machine. It is crucial for generating clamping force to overcome the expansion force of the molten plastic during the molding process. In existing technologies, the clamping force is generally perpendicular to the middle plate component, which fails to ensure that the supporting force is evenly applied to the mold of the middle plate component. Therefore, an electrically operated clamping column middle plate structure is proposed to solve the above-mentioned technical problems. Utility Model Content

[0003] One of the objectives of this application is to provide a middle plate structure for an electric locking column frame.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a middle plate structure for an electric clamping column frame, comprising a middle plate component and a pair of supporting hinges, wherein the supporting hinges are relatively inclined and symmetrically installed on one side of the middle plate component, the axial surfaces of the two supporting hinges intersect and cooperate with the other side of the middle plate component to form an installation space, the installation space being suitable for installing an injection mold; during clamping, the clamping force of the middle plate component is suitable for being along its axial direction.

[0005] Preferably, the projection angle of the axis of the supporting hinge and the axis of the middle plate component onto the vertical plane is θ, where 8°≦θ≦20°.

[0006] Preferably, the two supporting hinges are connected at their midpoints by a tie rod, and the tie rod, the supporting hinges, and the middle plate component together form an installation cavity.

[0007] Preferably, the support hinge is provided with a groove, thereby forming a pair of symmetrical support edges between the support hinge and the middle plate component.

[0008] Preferably, the support edge is provided with an extension portion away from the groove and close to the side of the middle plate component.

[0009] Preferably, the thickness of the middle plate component is greater than the thickness of its edge.

[0010] Preferably, the middle plate component is mounted on the injection molding machine via a linear guide rail assembly. The lower two sides of the middle plate component are provided with grooves, and the upper two sides of the middle plate component are provided with notches. The grooves are clearance-fitted with the gateposts of the injection molding machine, and the notches are fitted with the grooves.

[0011] Preferably, the injection molding machine includes a tail plate component, a lead screw mechanism, and a hinge assembly. The lead screw mechanism is mounted on the tail plate component, and the hinge assembly is a foldable structure. The first end of the hinge assembly is hinged to the middle plate component, the second end of the hinge assembly is hinged to the tail plate component, and the third end of the hinge assembly is hinged to the lead screw mechanism. During mold locking, the hinge assembly is adapted to unfold under the drive of the lead screw mechanism and lock the middle plate component.

[0012] Preferably, the lead screw mechanism includes a motor, a transmission assembly, a locking lead screw, and a crosshead. The motor is mounted on the outside of the tail plate component and flush with the end of the tail plate component. The locking lead screw is rotatably mounted on the tail plate component, and its end cooperates with the output end of the motor through the transmission assembly. The crosshead is slidably disposed on the tail plate component and cooperates with the locking lead screw, and the crosshead is hinged to the third end of the mechanical hinge assembly. During mold locking, the motor is adapted to drive the locking lead screw to rotate through the transmission assembly, thereby driving the crosshead to slide and act on the mechanical hinge assembly to unfold.

[0013] Preferably, the hinge assembly is symmetrically distributed vertically. The hinge assembly includes a first connecting plate, a second connecting plate, and a third connecting plate. The first end of the first connecting plate is the first end of the hinge assembly, the first end of the second connecting plate is the second end of the hinge assembly, and the first end of the third connecting plate is the third end of the hinge assembly. The second ends of the first and second connecting plates are hinged together, and the second end of the third connecting plate is hinged to the middle of the second connecting plate. The crosshead is adapted to drive the second connecting plate and the first connecting plate to rotate relative to each other through the third connecting plate, thereby realizing the unfolding or retraction of the hinge assembly. A hinge point one is formed between the first connecting plate and the middle plate component, a hinge point two is formed between the first connecting plate and the second connecting plate, and a hinge point three is formed between the second connecting plate and the tail plate component. During mold locking, the three hinge points are located on the same straight line.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] This invention, by installing the supporting hinges at a relatively inclined position, ensures that the clamping force not only acts perpendicularly to the middle plate component but also forms an inward squeezing force on the mold of the middle plate component. This allows the force to be applied evenly to the mold, thereby enhancing the limiting effect on the mold and making the mold more stable and reliable during clamping. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram showing the state of the middle plate component of this utility model during mold opening and mold closing.

[0018] Figure 3 This is a structural diagram of the lead screw mechanism, tail plate assembly, mechanical hinge assembly, and middle plate component of this utility model after disassembly.

[0019] Figure 4 This is a schematic diagram of the structure of the lead screw mechanism and the mold adjustment mechanism of this utility model when installed on the tail plate component.

[0020] Figure 5 This is a schematic diagram of the specific structure of the lead screw mechanism of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the mechanical hinge assembly of this utility model.

[0022] Figure 7 This is a schematic diagram illustrating the working principle of the mechanical hinge assembly of this utility model.

[0023] Figure 8 This is a schematic diagram of the specific mating structure of the support hinge lug of this utility model installed on the middle plate component.

[0024] Figure 9 These are three-dimensional and top view structural diagrams of the middle plate component of this utility model.

[0025] Figure 10 This is a schematic diagram of the middle plate component of this utility model when it is used in conjunction with the linear guide rail assembly.

[0026] Figure 11 This is a side view of the middle plate component of this utility model.

[0027] Figure 12 This is a schematic diagram of the specific structure of the mold adjustment mechanism of this utility model.

[0028] Figure 13 This is a schematic diagram of the specific structure of the transmission device of this utility model.

[0029] In the diagram: 1. Tail plate assembly; 2. Middle plate assembly; 3. Head plate assembly; 4. Lead screw mechanism; 401. Motor 1; 402. Transmission assembly; 403. Mold locking screw; 404. Cross head; 5. Mechanical hinge assembly; 501. Connecting plate 1; 502. Connecting plate 2; 503. Connecting plate 3; 6. Tie column; 7. Mold adjustment mechanism; 701. Motor 2; 702. Transmission device; 7021. Drive gear; 7022. Gear ring; 7023. Driven gear; 703. Screw sleeve; 8. Tail plate steel strip assembly; 9. Mechanical lock assembly; 10. Linear guide rail assembly; 11. Support hinge lug; 12. Ejection assembly; 13. Tie rod; 14. Groove; 15. Notch; 16. Column groove; 17. Mounting cavity; 18. Support edge. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] One preferred embodiment of this application, such as Figures 1 to 13 As shown, a middle plate structure of an electric mold clamping column includes a tail plate component 1, a middle plate component 2, a lead screw mechanism 4, and a mechanical hinge assembly 5. The tail plate component 1 and the middle plate component 2 are commonly used components in injection molding machines. The middle plate component 2 typically mounts the mold; its specific structure and location are common knowledge to those skilled in the art and will not be described further. The lead screw mechanism 4 is mounted on the tail plate component 1. The mechanical hinge assembly 5 is a foldable structure, with its first end hinged to the middle plate component 2, its second end hinged to the tail plate component 1, and its third end hinged to the lead screw mechanism 4.

[0034] Understandably, during mold locking, the lead screw mechanism 4 directly drives the mechanical hinge assembly 5 to unfold, and the unfolded mechanical hinge assembly 5 acts on the middle plate component 2, thereby locking the middle plate component 2. Thus, while existing technologies convert electrical energy into hydraulic energy, and then from hydraulic energy into mechanical energy to lock the middle plate component 2, this design directly locks the middle plate component 2 through a mechanical structure driven by electrical energy. Furthermore, the threads in the lead screw mechanism 4 have self-locking properties, ensuring the locked state of the middle plate component 2 even in the event of an electrical failure, further enhancing the stability during mold locking.

[0035] It should be noted that the hinge assembly 5 here is designed to amplify the force, allowing for stable locking of the middle plate component 2 with a relatively small driving force. During mold opening, the lead screw mechanism 4 will drive the hinge assembly 5 to fold and retract, releasing the locking of the middle plate component 2 and facilitating the mold opening operation.

[0036] As a further description of the above embodiments: such as Figure 4 and Figure 5 As shown, the lead screw mechanism 4 includes a motor 401, a transmission assembly 402, a locking lead screw 403, and a crosshead 404. The motor 401 is mounted on the outside of the tail plate component 1. The locking lead screw 403 is rotatably mounted on the tail plate component 1 and its end cooperates with the output end of the motor 401 through the transmission assembly 402. The crosshead 404 is slidably disposed on the tail plate component 1 and cooperates with the locking lead screw 403. The crosshead 404 is hinged to the third end of the hinge assembly 5.

[0037] Understandably, during mold clamping, the forward rotation of motor 401 drives the mold clamping screw 403 to rotate via transmission assembly 402, which in turn drives the crosshead 404 to slide and act on the mechanical hinge assembly 5 to unfold. Conversely, when motor 401 rotates in reverse, it drives the mechanical hinge assembly 5 to fold and retract.

[0038] like Figure 4As shown, the locking screw 403 could be directly connected to the output end of the motor 401, meaning the motor 401 could be installed at the end of the tail plate component 1. However, this would increase the length of the tail plate component 1, thus increasing the overall size of the injection molding machine. Therefore, in this design, the output end of the motor 401 is connected to the locking screw 403 via the transmission assembly 402. The motor 401 can then be installed on the side of the tail plate component 1 and flush with its end (i.e., inverted installation). This avoids excessively "extending" the length of the tail plate component 1, resulting in a shorter overall length of the locking column. This reduces the space requirements for the injection molding machine, allowing for a larger number of machines to be placed in the same space, saving space. Of course, this application does not specifically limit the structure of the transmission assembly 402; for example, it could use belt drive, chain drive, or gear drive, etc.

[0039] In one embodiment of this application, such as Figure 6 As shown, the mechanical hinge assembly 5 preferably adopts a symmetrical distribution, which makes the mechanical hinge assembly 5 more stable and reliable when providing mold clamping support. The symmetrical structure also ensures more even force distribution, preventing structural damage caused by excessive force in one direction, thus further enhancing the service life and stability of the mold clamping mechanism. Specifically, the mechanical hinge assembly 5 includes connecting plate 1 501, connecting plate 2 502, and connecting plate 3 503. The first end of connecting plate 1 501 is the first end of the mechanical hinge assembly 5, the first end of connecting plate 2 502 is the second end of the mechanical hinge assembly 5, and the first end of connecting plate 3 503 is the third end of the mechanical hinge assembly 5. The second ends of connecting plate 1 501 and connecting plate 2 502 are hinged together, and the second end of connecting plate 3 503 is hinged together with the middle of connecting plate 2 502.

[0040] To facilitate understanding of the specific driving process of the lead screw mechanism 4, its working principle is described below:

[0041] Initial state (i.e., mold opening state) as follows Figure 2 As shown in (b), the hinge assembly 5 is in a folded and stowed state at this time, which is also the maximum opening distance state, that is, the distance between the middle plate component 2 and the head plate component 3 in the injection molding machine is the largest. Let the distance between the two be W. During mold closing, as... Figure 7 As shown in (d), the forward rotation of motor 401 drives the locking screw 403 to rotate via transmission assembly 402. The locking screw 403 drives the crosshead 404 to move to the right. The crosshead 404 acts on the upper and lower connecting plates 503, causing the previously "lying down" connecting plate 503 to rotate and "stand up," lifting the connecting plate 502. Simultaneously, the connecting plate 502 rotates and acts on the connecting plate 501. Finally, under the pushing action of the connecting plate 501, the middle plate component 2 moves to the right, approaching the head plate component 3 for mold closing. Figure 2As shown in (a), this is the mold closing state diagram. The distance between the middle plate component 2 and the head plate component 3 is set as D. Of course, the difference V between W and D is the mold opening movement stroke V of the middle plate component 2. That is, V is the space requirement size for picking up the product.

[0042] It should be known that an injection mold (not shown) is installed between the middle plate component 2 and the head plate component 3. Specifically, a moving template is generally installed on the middle plate component 2 and a fixed template is installed on the head plate component 3, which is also known to those skilled in the art.

[0043] Further optimization, such as Figure 7 As shown in (c), hinge point one is formed between connecting plate 1 501 and middle plate component 2, hinge point two is formed between connecting plate 1 501 and connecting plate 2 502, and hinge point three is formed between connecting plate 2 502 and tail plate component 1. During mold closing, the three hinge points are located on the same straight line (as shown by the dotted line in the figure). That is to say, the unfolded connecting plate 1 501 and connecting plate 2 502 are located on the same straight line, thereby enabling self-locking between connecting plate 1 501 and connecting plate 2 502, enhancing the stability of the mechanical hinge assembly 5 during mold closing. Of course, the three hinge points here do not only refer to physical connection points, but also to the equivalent hinge action points formed between connecting plate 1 501, connecting plate 2 502, and connecting plate 3 503 during the operation.

[0044] Further preferably, to improve the limiting effect on the middle plate component 2, symmetrically distributed support hinges 11 are preferably installed on one side (left side) of the middle plate component 2. Specifically, the upper support hinge 11 engages with the upper connecting plate 501, and the lower support hinge 11 engages with the lower connecting plate 501, thus forming a symmetrical upper and lower support limiting, improving the stability of the middle plate component 2 in the mold-locked state. However, in conventional designs by those skilled in the art, the support hinges 11 are perpendicular to the middle plate component 2, meaning the force is applied perpendicularly to the middle plate component 2 for limiting, thus failing to ensure that the supporting force is evenly applied to the mold of the middle plate component 2. Achieving uniform support through more sets of support hinges 11 would result in a complex structure, higher cost, and require more installation space.

[0045] Therefore, in order to solve the above-mentioned technical problems, such as Figure 8As shown, the support hinge 11 can be installed at an angle, that is, the support hinge 11 is installed at an angle relative to the horizontal plane of the axis of the middle plate component 2. Since the two support hinges 11 are symmetrically distributed vertically, the extended lines of the axes of the two support hinges 11 intersect at point "O" on the other side (right side) of the middle plate component 2. In other words, the axial surfaces of the two support hinges 11 will intersect, and then the two axial surfaces will cooperate with the right side of the middle plate component 2 to form an installation space. This installation space has a triangular prism structure, and the injection mold is installed in this installation space. When clamping the mold, the axis of the support hinge 11 coincides with the straight line formed by the three hinge points during clamping.

[0046] It should be noted that the axial surface of the support hinge 11 mentioned above means: the surface that is parallel to the upper (lower) end surface of the support hinge 11 and passes through the axis of the support hinge 11.

[0047] It is understandable that, such as Figure 8 As shown, the clamping force acts obliquely on the support hinge 11 along direction A, meaning that the upper and lower clamping forces act directly on the support hinge 11. Furthermore, the two forces are applied at an angle relative to each other and close to the axis of the middle plate component 2. Therefore, the clamping force not only acts perpendicular to the middle plate component 2 but also forms an inward compressive force on the mold of the middle plate component 2, allowing the force to be applied evenly to the mold, thereby enhancing the limiting effect on the mold and making the mold more stable and reliable during clamping. Simultaneously, due to the oblique arrangement of the support hinge 11, the point of application of the clamping force on the middle plate component 2 (i.e., point "O") is closer to the center of the mold, further improving the stability during clamping.

[0048] It should be noted that the tilt angle of the support hinge 11 also needs to be optimized. Specifically, the tilt angle of the projection of the axis of the support hinge 11 and the axis of the middle plate component 2 onto the vertical plane is set as θ, where 8°≦θ≦20°. That is to say, the tilt angle of the support hinge 11 cannot be too large or too small. For example, if the tilt angle is too small, such as θ = 3°, it means that the support hinge 11 and the middle plate component 2 are still nearly perpendicular, and there will still be a problem that the supporting force cannot be evenly applied to the mold. If the tilt angle is too large, such as θ = 30°, under the action of the clamping force, the connection between the support hinge 11 and the middle plate component 2 is prone to deformation, and may even cause the support hinge 11 itself to deform and be damaged, thereby affecting the service life and stability of the clamping mechanism. Therefore, setting the tilt angle θ of the projection of the axis of the supporting hinge 11 and the axis of the middle plate component 2 on the vertical plane to 8°≦θ≦20° allows the clamping force to act better on the mold, while ensuring the stability of the connection between the supporting hinge 11 and the middle plate component 2, further improving the service life and stability of the clamping mechanism.

[0049] Based on the above embodiments, the following problem may exist during use: because the two supporting hinges 11 are symmetrically inclined, they may still flare outwards under stress, meaning they may still deform and be damaged. Therefore, to solve this problem, one embodiment of this application, such as... Figure 9 As shown, the upper and lower two support hinges 11 are connected by a tie rod 13 in the middle, and the tie rod 13, the support hinges 11 and the middle plate component 2 enclose and form an installation cavity 17.

[0050] It is understandable that, through the setting of the tie rod 13, the strength of the two outwardly flared support hinges 11 can be further enhanced under the action of the tie rod 13 during mold locking, thereby preventing deformation of the support hinges 11 and improving the service life and stability of the mold locking mechanism. At the same time, the mounting cavity 17 can also provide a certain mounting space for the ejector assembly 12. Of course, the ejector assembly 12 is common knowledge known to those skilled in the art, so it will not be described in detail.

[0051] like Figure 9 As shown, if the support hinge 11 adopts a "plate" structure, stress concentration is likely to occur when supporting the middle plate component 2. That is, under the action of the hinge assembly 5, the force of the support hinge 11 on the middle plate component 2 is concentrated at the center position where the support hinge 11 and the middle plate component 2 are connected. This will cause the support force to be applied unevenly in the front and rear directions.

[0052] Therefore, in order to solve the above-mentioned technical problems, such as Figure 9 As shown in (e), a groove 14 is provided on the support hinge 11, so that the support hinge 11 and the middle plate component 2 can form two symmetrical support sides 18, which allows the support force to be evenly distributed on the front and rear sides of the middle plate component 2. Since there is a pair of support hinges 11, there are four rectangular support sides 18, which form a "four-point" support and limit for the middle plate component 2, greatly improving the stability during mold clamping. At the same time, the "hollowed-out" design can save materials and reduce the weight of the middle plate component 2 while ensuring strength, further reducing production costs. Of course, due to the design of the groove 14, it also provides a certain operating space for subsequent maintenance after the ejector component 12 fails, thereby improving the convenience of subsequent maintenance.

[0053] Furthermore, such as Figure 9As shown in (f), to improve the stability of the support edge 18, an extension is provided on the side of the support edge 18 away from the groove 14 and close to the middle plate component 2. In simpler terms, an outer support foot-like structure is provided at the connection point of the support edge 18, as shown at point B in the figure. This outer support foot-like structure increases the contact area between the support edge 18 and the middle plate component 2, allowing the supporting force to be distributed more evenly on the middle plate component 2, further improving the stability during mold clamping. Simultaneously, this outer support foot-like structure also increases the overall strength of the support hinge 11, preventing deformation or damage during mold clamping, thereby extending the service life of the mold clamping mechanism.

[0054] Further optimization reveals that during the actual stress process of the middle plate component 2, the center of the middle plate component 2 is the point of force concentration, while the outer edge experiences little or no traction force and undergoes minimal deformation. Therefore, the thickness of the middle plate component 2 can be designed to be greater than the thickness of the edges, specifically as follows: Figure 8 As shown, let the thickness of the middle plate component 2 be H, and the thickness of its edges be L. Then, H is greater than L. This design allows the middle plate component 2 to be more evenly stressed, avoiding deformation in the middle area due to excessive stress, thereby further improving the stability and service life of the clamping mechanism. Simultaneously, the design of a greater thickness in the middle than at the edges can save materials and reduce production costs while ensuring strength. Of course, as... Figure 10 As shown, in order to achieve a better transition and processing between the edge and the center of the middle plate component 2, a chamfering method can be used to achieve a thinner edge.

[0055] In one embodiment of this application, such as Figure 1 As shown, the head plate component 3 and the tail plate component 1 can be connected by multiple guide pillars 6, preferably four arranged in a rectangular pattern. It is understood that during injection molding, the expansion force of the plastic product inside the mold causes the guide pillars 6 in the head plate component 3 to undergo elastic deformation, generating a reaction force that binds and locks the mold. Simultaneously, the arrangement of the guide pillars 6 makes the connection between the head plate component 3 and the tail plate component 1 within the injection molding machine more stable.

[0056] It should be understood that in the prior art, the middle plate component 2 is generally guided and limited by the guide post 6, thus requiring consideration of wear and lubrication between the two. Therefore, to solve the above problems, in one embodiment of this application, such as Figure 1 As shown, the middle plate component 2 can be installed on the injection molding machine through the linear guide rail assembly 10. The linear guide rail assembly 10 adopts a rolling friction guide rail, which has a small coefficient of friction, flexible and stable movement and high precision. It can reduce the frictional resistance of the middle plate component 2 during movement. Compared with the original guide rail 6 for guiding and limiting, there is no pollution of product and environment by lubricating oil.

[0057] Based on the above embodiments, since the tie rod 6 also needs to pass through the middle plate component 2, in order to make the two work together more harmoniously, the specific details are as follows: Figure 11 As shown, firstly, grooves 16 are provided on both sides of the lower end of the middle plate component 2. A pair of guide pillars 6 pass through these grooves 16, and the grooves 16 and guide pillars 6 are fitted with a clearance. This ensures that the two do not contact each other, thus preventing any impact on the sliding of the middle plate component 2. On the other hand, if the linear guide assembly 10 subsequently deviates, the grooves 16 and guide pillars 6 will come into contact, and the guide pillars 6 will also serve a guiding function. The main purpose is to allow workers to promptly detect and repair any faults in the linear guide assembly 10. Secondly, notches 15 are provided on both sides of the upper end of the middle plate component 2. A pair of guide pillars 6 pass through these notches 15. This design of the notches 15 reduces the material cost of the middle plate component 2, while also simplifying its structure and reducing its overall weight.

[0058] In one embodiment of this application, such as Figure 1 , Figure 12 and Figure 13 As shown, the mold clamping mechanism of the injection molding machine also includes a mold adjustment mechanism 7. The mold adjustment mechanism 7 includes a second motor 701, a transmission device 702, and multiple threaded sleeves 703. The threaded sleeves 703 are rotatably mounted on the tail plate component 1 and are engaged with the corresponding tie rods 6 by threads. The second motor 701 is mounted on the tail plate component 1. The transmission device 702 is mounted on the tail plate component 1 and its input end is connected to the output end of the second motor 701. The output end of the transmission device 702 is connected to the threaded sleeves 703.

[0059] Understandably, during adjustment, motor 701 can drive the screw sleeve 703 to rotate through transmission device 702. Under the action of the guide post 6, the screw sleeve 703 can drive the tail plate component 1 to move and adjust along the axis of the guide post 6, thereby realizing the change of the above-mentioned middle D distance, which can adapt to different mold thicknesses.

[0060] This application does not specifically limit the structure of the transmission device 702, but the following specific embodiment is provided for reference:

[0061] like Figure 13 As shown, the transmission device 702 includes a drive gear 7021, a gear ring 7022, and a plurality of driven gears 7023. The drive gear 7021 is installed at the output end of the motor 701. The gear ring 7022 is rotatably installed on the tail plate component 1 and meshes with the drive gear 7021. The driven gears 7023 are sleeved on the corresponding threaded sleeves 703 and mesh with the gear ring 7022.

[0062] Understandably, during adjustment, motor 701 can drive the drive gear 7021 to rotate. The drive gear 7021 acts on the gear ring 7022 to rotate, and the gear ring 7022 can drive all the driven gears 7023 to rotate synchronously. That is, the screw sleeve 703 rotates synchronously to move and adjust axially along the guide post 6.

[0063] Further preferably, motor 701 is also mounted on the outside of tailplate component 1 and flush with the end of tailplate component 1, i.e., it adopts the same inverted mounting arrangement as motor 401. This reduces the overall length of tailplate component 1, and motor 401 and motor 701 are symmetrically arranged (e.g., Figure 4 As shown in the figure, this makes the tail plate component 1 bear the force evenly, and at the same time, the two motors are far apart from each other, so that they will not interfere with each other and improve the stability of the device operation.

[0064] In this embodiment, as Figure 1 As shown, to achieve effective force transmission, the tail plate component 1 is mounted on the injection molding machine via the tail plate steel belt assembly 8, and the middle plate component 2 is mounted on the linear guide assembly 10, ensuring that the center height of the tail plate component 1 is consistent with the center height of the middle plate component 2 and also consistent with the center height of the head plate component 3, thereby achieving smooth force transmission. Of course, a mechanical lock assembly 9 is also installed on the injection molding machine. The mechanical lock assembly 9 cooperates with the middle plate component 2 to lock and unlock it. Naturally, the mechanical lock assembly 9 and the aforementioned tail plate steel belt assembly 8 are common knowledge to those skilled in the art, and therefore will not be described in detail.

[0065] The main beneficial effects of this invention are as follows: (I) Compared with the traditional multi-ribbed, grid-type box template structure of the middle plate, the middle plate component 2 of this design is convenient in shape and easy to assemble. In particular, the simple plate and frame structure of the middle plate saves the amount of raw materials used, and the extraction of raw materials is energy-saving. (II) The tie rod 6 does not come into contact with the middle plate component 2, so there is no lubricating oil to pollute the product and the environment; thus, it has energy-saving benefits for the industry. (III) The middle plate support moves on the linear guide rail, with little assistance, low power requirement, and energy saving; it has high control precision; the operation of the injection molding machine using the ejector pin in a narrow space is simple, the design structure is simple, the force is uniform, and it is conducive to mass production.

[0066] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A middle plate structure for an electric mold-locking column frame, characterized in that, include: The middle plate component and a pair of support hinges are installed on one side of the middle plate component with relative inclination and symmetrical arrangement. The axial surfaces of the two support hinges intersect and cooperate with the other side of the middle plate component to form an installation space. The installation space is suitable for installing the injection mold. When clamping the mold, the clamping force of the middle plate component is suitable to be along its axial direction.

2. The middle plate structure of the electric locking column frame as described in claim 1, characterized in that: The tilt angle of the projection of the axis of the supporting hinge and the axis of the middle plate component onto the vertical plane is θ, where 8°≦θ≦20°.

3. The middle plate structure of the electric locking column frame as described in claim 2, characterized in that: The two supporting hinges are connected at their midpoints by a tie rod, and the tie rod, the supporting hinges, and the middle plate component together form an installation cavity.

4. The middle plate structure of the electric locking column frame as described in claim 3, characterized in that: The support hinge is provided with a groove, thereby forming a pair of symmetrical support edges between the support hinge and the middle plate component.

5. The middle plate structure of the electric locking column frame as described in claim 4, characterized in that: An extension is provided on the side of the support edge that is away from the groove and close to the middle plate component.

6. The middle plate structure of the electric locking column frame as described in claim 5, characterized in that: The thickness of the middle plate component is greater than the thickness of its edges.

7. The middle plate structure of the electric mold-locking column frame as described in any one of claims 1-6, characterized in that: The middle plate component is mounted on the injection molding machine via a linear guide rail assembly. The lower two sides of the middle plate component are provided with grooves, and the upper two sides of the middle plate component are provided with notches. The grooves are clearance-fitted with the gate columns of the injection molding machine, and the notches are fitted with the grooves.

8. The middle plate structure of the electric locking column frame as described in claim 7, characterized in that: The injection molding machine includes a tail plate component, a lead screw mechanism, and a hinge assembly. The lead screw mechanism is mounted on the tail plate component, and the hinge assembly has a foldable structure. The first end of the hinge assembly is hinged to the middle plate component, the second end of the hinge assembly is hinged to the tail plate component, and the third end of the hinge assembly is hinged to the lead screw mechanism. During mold locking, the hinge assembly is adapted to unfold under the drive of the lead screw mechanism and lock the middle plate component.

9. The middle plate structure of the electric locking column frame as described in claim 8, characterized in that: The lead screw mechanism includes a motor, a transmission assembly, a locking screw, and a crosshead. The motor is mounted on the outside of the tail plate component and flush with the end of the tail plate component. The locking screw is rotatably mounted on the tail plate component, and its end cooperates with the output end of the motor through the transmission assembly. The crosshead is slidably disposed on the tail plate component and cooperates with the locking screw, and the crosshead is hinged to the third end of the mechanical hinge assembly. During mold locking, the motor is adapted to drive the locking screw to rotate through the transmission assembly, thereby driving the crosshead to slide and act on the mechanical hinge assembly to unfold.

10. The middle plate structure of the electric mold-locking column frame as described in claim 9, characterized in that: The hinge assembly is symmetrically arranged vertically. The hinge assembly includes a first connecting plate, a second connecting plate, and a third connecting plate. The first end of the first connecting plate is the first end of the hinge assembly, the first end of the second connecting plate is the second end of the hinge assembly, and the first end of the third connecting plate is the third end of the hinge assembly. The second ends of the first and second connecting plates are hinged together, and the second end of the third connecting plate is hinged to the middle of the second connecting plate. The crosshead is adapted to drive the second connecting plate and the first connecting plate to rotate relative to each other via the third connecting plate, thereby realizing the unfolding or retraction of the hinge assembly. Hinge point one is formed between connecting plate one and the middle plate component, hinge point two is formed between connecting plate one and connecting plate two, and hinge point three is formed between connecting plate two and the tail plate component; during mold locking, the three hinge points are located on the same straight line.

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